Backhoes
BH3512
20555
340-131M
Operator’s Manual
Read the Operator’s manual entirely. When
you see this symbol, the subsequent
instructions and warnings are serious - follow
without exception. Your life and the lives of
others depend on it!
!
7/14/08
© Copyright 2008 Printed
Cover photo may show optional equipment not supplied
with standard unit.
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▲
Land Pride
Important Safety Information
Important Safety Information
These are common practices that may or may not be applicable to the products described in
this manual.
Safety at All Times
Look For The Safety Alert Symbol
Thoroughly read and understand
the instructions given in this
manual before operation. Refer to
the “Safety Label” section, read
all instructions noted on them.
The SAFETY ALERT SYMBOL indicates there is a
potential hazard to personal safety involved and extra
safety precaution must be taken. When you see this
symbol, be alert and carefully read the message that
follows it. In addition to design and configuration of
equipment, hazard control and accident prevention
are dependent upon the awareness, concern,
prudence and proper training of personnel involved in
the operation, transport, maintenance and storage of
equipment.
Do not allow anyone to operate
this equipment who has not fully
read and comprehended this
manual and who has not been
properly trained in the safe
operation of the equipment.
!
▲ Operator should be familiar with
!
Be Aware of
Signal Words
WARNING
all functions of the unit.
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury, and
includes hazards that are exposed
when guards are removed. It may also
be used to alert against unsafe
practices.
▲ Operate implement from the
driver’s seat only.
A Signal word designates a degree or
level of hazard seriousness. The
signal words are:
▲ Make sure all guards and shields
are in place and secured before
operating the implement.
▲ Do not leave tractor or implement
!
DANGER
unattended with engine running.
Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury. This
signal word is limited to the most
extreme situations, typically for
machine components that, for
functional purposes, cannot be
guarded.
!
CAUTION
▲ Dismounting from a moving
tractor could cause serious injury
or death.
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
▲ Do not stand between the tractor
and implement during hitching.
▲ Keep hands, feet, and clothing
away from power-driven parts.
▲ Wear snug fitting clothing to avoid
entanglement with moving parts.
▲ Watch out for wires, trees, etc.,
when raising implement. Make
sure all persons are clear of
working area.
For Your Protection
Shutdown and Storage
▲ Turning tractor too tight may
cause implement to ride up on
wheels. This could result in injury
or equipment damage.
▲ Thoroughly read and understand
the “Safety Label” section, read all
instructions noted on them.
▲ Lower machine to ground, put
tractor in park, turn off engine, and
remove the key.
▲ Detach and store implements in a
area where children normally do
not play. Secure implement by
using blocks and supports.
OFF
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Land Pride
Important Safety Information
These are common practices that may or may not be applicable to the products described in
this manual.
20 mph when weight is less
than or equal to the weight of
tractor.
Transport
Machinery Safely
Use Safety
Lights and Devices
10 mph when weight is double
▲ Comply with state and local laws.
▲ Slow moving tractors, self-
propelled equipment, and towed
implements can create a hazard
when driven on public roads. They
are difficult to see, especially at
night.
the weight of tractor.
▲ Maximum transport speed for
implement is 20 mph. DO NOT
EXCEED. Never travel at a speed
which does not allow adequate
control of steering and stopping.
Some rough terrain require a
slower speed.
▲ Sudden braking can cause a
towed load to swerve and upset.
Reduce speed if towed load is not
equipped with brakes.
IMPORTANT: Do not tow a load that
is more than double the weight of
tractor.
Transporting the Loader
and Attachment
▲ Flashing warning lights and turn
signals are recommended
whenever driving on public roads.
▲ Always drive up the ramp with
heavy end uphill. Engage parking
brake.
▲ Secure loader and attachments
using tiedowns and chains. Use
towing vehicle and trailer of
adequate capacity.
▲ Use the following maximum
speed - tow load weight ratios as
a guideline:
▲ Allow implement to cool
Practice Safe Maintenance
Tractors With Cabs
Tractors Equipped With
ROPS
completely.
▲ Understand procedure before
doing work. Use proper tools and
equipment, refer to Operator’s
Manual for additional information.
▲ Do not grease or oil implement
while it is in operation.
▲ Inspect all parts. Make sure parts
are in good condition & installed
properly.
▲ There should be sufficient
clearance for the operator when
mounted to a tractor with a cab or
that is equipped with ROPS.
▲ The ROPS may need to be
extended or flipped around to
obtain sufficient clearance.
▲ Work in a clean dry area.
▲ Lower the implement to the
ground, put tractor in park, turn off
engine, and remove key before
performing maintenance.
▲ Remove buildup of grease, oil or
debris.
▲ Remove all tools and unused
parts from implement before
operation.
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Land Pride
Important Safety Information
These are common practices that may or may not be applicable to the products described in
this manual.
Wear
Prepare for Emergencies
Protective Equipment
▲ Be prepared if a fire starts.
▲ Protective clothing and equipment
▲ Keep a first aid kit and fire
should be worn.
extinguisher handy.
▲ Wear clothing and equipment
▲ Keep emergency numbers for
appropriate for the job. Avoid
doctor, ambulance, hospital and
loose fitting clothing.
fire department near phone.
▲ Prolonged exposure to loud noise
can cause hearing impairment or
hearing loss. Wear suitable
hearing protection such as
earmuffs or earplugs.
▲ Operating equipment safely
requires the full attention of the
operator. Avoid wearing radio
headphones while operating
machinery.
911
Avoid High
Pressure Fluids Hazard
Keep Riders
Off Machinery
▲ Escaping fluid under pressure can
▲ Riders obstruct the operator’s
view, they could be struck by
foreign objects or thrown from the
machine.
penetrate the skin causing serious
injury.
▲ Avoid the hazard by relieving
pressure before disconnecting
hydraulic lines.
▲ Use a piece of paper or
cardboard, NOT BODY PARTS, to
check for suspected leaks.
▲ Never allow children to operate
equipment.
▲ Wear protective gloves and safety
glasses or goggles when working
with hydraulic systems.
▲ If an accident occurs, see a
doctor immediately. Any fluid
injected into the skin must be
surgically removed within a few
hours or gangrene may result.
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Land Pride
Important Safety Information
make sure the correct safety labels are included in the
request.
4. Refer to this section for proper label placement.
To install new labels:
Safety Labels
Your backhoe comes equipped with all safety labels in place.
They were designed to help you safely operate your implement.
Read and follow their directions.
a. Clean the area the label is to be placed.
1. Keep all safety labels clean and legible.
2. Replace all damaged or missing labels. To order new
b. Spray soapy water on the surface where the label is to
be placed.
labels go to your nearest Land Pride dealer.
c. Peel backing from label. Press firmly onto the surface.
d. Squeeze out air bubbles with the edge of a credit card.
3. Some new equipment installed during repair requires
safety labels to be affixed to the replaced component as
specified by Land Pride. When ordering new components
838-380C
19364
19366
19366
Caution: Lock For Transport
838-378C
Warning: Pinch or Crush Hazard
838-379C
Danger: Overhead/
Underground Utilities
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Land Pride
Important Safety Information
818-339C
Warning: High Pressure
19366
839-933C
Warning: General
19366
839-932C
Caution: Watch your step
19366
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Introduction
Introduction
Land Pride welcomes you to the growing family of new
product owners.
parts and equipment needed to service the backhoe.
The parts on your backhoe have been specially designed
and should only be replaced with genuine Land Pride
parts. Therefore, should your backhoe require
This Backhoe has been designed with care and built by
skilled workers using quality materials. Proper assembly,
maintenance, and safe operating practices will help you
get years of satisfactory use from the machine.
replacement parts go to your Land Pride Dealer.
Serial Number Plate
Application
For prompt service always use the serial number and
model number when ordering parts from your Land Pride
dealer. Be sure to include your serial and model numbers
in correspondence also. Refer to Figure 1 for the location
of your serial number plate.
The BH3512 Backhoe is the ideal tool for farms, drainage
ditches, nurseries, golf courses, utilities and cemeteries.
An unobstructed view of the work area, comfortable
positioning of the controls and walk through platform
allow for hours of fatigue free work. Stabilizer legs
provide a stance of 10’ 7" assuring more stability and
safer operational control. Optional rubber shoes can be
added to the stabilizer legs for working on concrete.
Selected skid steer loader mounting kits are available for
added versatility. See “Features and Benefits”,
“Section 6” for additional information.
Using This Manual
• This Operator’s Manual is designed to help familiarize
you with safety, assembly, operation, adjustments,
troubleshooting, and maintenance. Read this manual
and follow the recommendations to help ensure safe
and efficient operation.
• The information contained within this manual was
current at the time of printing. Some parts may change
slightly to assure you of the best performance.
20556
• To order a new Operator’s or Parts Manual contact
your authorized dealer. Manuals can also be
downloaded, free-of-charge from our website at
Service & Support Center by your dealer.
Serial Number Plate Location
Figure 1
Further Assistance
Terminology
“Right” or “Left” as used in this manual is determined by
facing the direction the machine will operate while in use
unless otherwise stated.
Your dealer wants you to be satisfied with your new
backhoe. If for any reason you do not understand any
part of this manual or are not satisfied with the service
received, the following actions are suggested:
1. Discuss the matter with your dealership service
manager making sure he is aware of any problems
you may have and that he has had the opportunity to
assist you.
Definitions
NOTE: A special point of information that the
operator must be aware of before continuing.
2. If you are still not satisfied, seek out the owner or
general manager of the dealership, explain the
problem and request assistance.
IMPORTANT: A special point of information related
to its preceding topic. Land Pride’s intention is that
this information should be read and noted before
continuing.
3. For further assistance write to:
Land Pride Service Department
1525 East North Street
P.O. Box 5060
Owner Assistance
The Warranty Registration card should be filled out by
the dealer at the time of purchase. This information is
necessary to provide you with quality customer service.
Salina, Ks. 67402-5060
E-mail address
If customer service or repair parts are required contact a
Land Pride dealer. A dealer has trained personnel, repair
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Land Pride
Introduction
19. Do not attempt to raise the tractor off the ground or
move the tractor forward or backward using the boom
or stabilizers.
Backhoe Operation, Maintenance &
Safety Tips
1. Your backhoe must be mounted only on a tractor
equipped with a Category 1 or 2 hitch or Skid Steer
Hitch. Failure to do so may result in serious injury.
20. When leaving the backhoe for any reason, lower the
bucket to the ground for safety.
21. Never leave the backhoe unattended with tractor
engine running.
2. When servicing the backhoe, make sure all moving
parts are on the ground.
22. To prevent injury during assembly, installation,
operation, adjustment, or removal of the backhoe, it
is recommended that gloves, safety glasses or face
shield, and safety toe shoes be worn.
3. To avoid injury from escaping pressurized hydraulic
fluid, move the control levers in all directions before
disconnecting any hoses, steel lines, or couplers.
4. Keep footpads clean to prevent feet from slipping
while mounting backhoe.
23. Do not wear loose clothing while operating or
working near the backhoe. Keep hair and clothing
away from all moving parts of the backhoe.
5. Do not transport your backhoe with the bucket fully
raised.
24. Only the operator should be near the backhoe during
operation. Keep all others a minimum of fifty feet
away from your work area.
6. Be sure your tractor has sufficient front end weight to
operate and transport the backhoe.
7. When traveling on highways and roads, be sure the
boom and stabilizers are in the fully raised position
and transport lock is in the transport lock position.
25. Keep your work area clear of obstacles at all times.
26. Children should never be permitted to operate the
backhoe.
8. When traveling on a road with your backhoe, use
proper safety lights and warning sign. Check local
regulations.
27. Do not attempt any repairs, maintenance, or
adjustments of your backhoe while it is in operation.
Always turn off your tractor before making repairs or
adjustments or performing maintenance procedures.
9. When traveling with your backhoe, do not make
sudden starts, stops or turn at high speeds. Do not
exceed safe speed limits on rough ground. Do not
make sudden starts when climbing grades.
28. When the use of hand tools is required to perform
any part of assembly, installation, removal or
adjustment of the backhoe, be sure that the tools are
designed and recommended by the tool
manufacturer for the specific task in which they are
being used.
10. Always wear protective headgear while operating
backhoe.
11. Be sure to lower the stabilizers to the ground before
operating the backhoe.
29. Keep all bolts and nuts tight. Replace any damaged
or worn parts such as hydraulic hoses and fittings
immediately. Always use Land Pride replacement
parts.
12. Lookout for overhead low hanging wires. Do not
touch wires with any part of the backhoe.
13. Do not operate from any position other than the
backhoe’s operator’s seat.
30. Perform all maintenance procedures as
recommended.
14. Before swinging the backhoe for any reason, make
sure you have room to swing and that all persons are
clear of the backhoe.
31. Anytime hoses are disconnected from your backhoe,
cover all open ports with protective caps or plugs in
order to prevent contamination of the oil supply.
15. Be extra careful when working on hillsides and close
to ditches or any place where danger of tipping or
sliding is possible.
IMPORTANT: Make sure that there is sufficient
clearance for the operator if the backhoe is mounted
to a tractor with a cab or is equipped with a ROPS.
The ROPS may need to be extended or flipped
around to obtain sufficient clearance.
16. Do not dig under the stabilizers or backhoe, as a
cave-in could occur.
17. Be sure you are not digging over underground wiring
or other underground obstructions.
18. When digging to either side and close to the tractor,
be extremely careful that the backhoe does not
contact the stabilizers as serious damage could
occur.
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Section 1: Assembly and Set-Up
Section 1: Assembly and Set-Up
Tractor Requirements
Open Center System
Remove cap from the 1/2” high pressure hose connected
to the right hand side of backhoe valve. The high
pressure hose may be connected to any high pressure
outlet in the tractor system. A tractor remote hydraulic
valve is usually the preferable source. An oil quick
coupler that is compatible to the oil coupler on the tractor
valve is permissible.
!
CAUTION!
Your backhoe must be mounted only on a tractor equipped with
a Category 2 and 3 hitch. Failure to do so may result in serious
injury.
NOTE: In order to maintain steering control on your
tractor, ballast may need to be added to your tractor.
To determine whether or not to add the ballast, refer
to your tractor’s operator manual.
The return hose must be connected so that the oil returns
directly to the tractor oil sump. DO NOT connect the
return hose directly to the tractor remote valve. If the
operator would be reversed. This could result in damage
to the return hose or the backhoe’s hydraulic valve.
Hydraulic System Requirements
!
CAUTION!
!
CAUTION!
The hydraulic valve can be damaged by reverse flow of oil
through the valve, disconnecting the return hose while the
tractor is running, and by using more than 12 GPM of oil flow
while operating. The valve manufacturer will not warrant the
valve when damaged under these circumstances.
The backhoe valve must be compatible with the hydraulic
system that will power it. Make sure that if you are powering the
backhoe with an open center hydraulic system, the backhoe is
set for open center operation. If you are using a closed center
hydraulic system, the valve must be set for closed center
operation. If you are using a power beyond setup, the valve must
be converted for this use. See the appropriate section of this
manual on how to convert your valve. If you do not know how
your valve is currently setup, check with your Land Pride
dealer.
Closed Center System
Power Beyond Closed Center Kit
Part No. 340-084A
Your backhoe cylinders have been filled with oil at the
factory. The oil in the unit is compatible with most tractor
manufacturers’ oil. Do not move any control levers on the
unit until after hydraulic connections to the tractor or the
independent hydraulic system have been made.
!
CAUTION!
If you are going to use a closed center tractor hydraulic system
to power your Land Pride Backhoe, A Power Beyond and
Closed Center Kit must be purchased from your Land Pride
Dealer, then you must follow carefully the directions below.
Failure to do so may cause extensive damage to your tractor
and/or Land Pride Backhoe.
The Land Pride Backhoe has been designed to be
operated at a flow rate of 8-11 GPM.
Since many tractor systems exceed a flow rate specified
for your backhoe, the flow may have to be adjusted by
throttling the engine RPM down to obtain an acceptable
flow rate. By adjusting the flow rate correctly, you will
prevent sudden shock loads on the cylinders, pins,
hoses seals, etc. This results in a smooth operation and
reduced maintenance costs and down time.
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Land Pride
Section 1: Assembly and Set-Up
Refer to Figure 1-1:
Power Beyond Closed Center Kit
Part No. 340-084A
1. Adjust the Valve Bypass for Closed Center
Conversion only.
For power beyond applications, a Power Beyond and
Closed Center Kit (Part # 340-084A) must be purchased
from your Land Pride Dealer, then perform the following
steps:
a. Remove the cover nut (#3) from the valve bypass.
This exposes a socket head screw.
b. Loosen locknut and turn socket head screw in
approximately four complete turns, then tighten
locknut.
3. Remove return hose and elbow, only if it was
installed at point “B”.
c. Replace cover nut. Be sure to replace the washer
with the cover nut as it acts as a gasket.
4. Remove plug (#4) from port “A” and install Power
beyond sleeve (#1) in port “B” as shown in Figure 1-
2.
2. Installing the Closed Center Sleeve.
5. Install a #8 O-Ring ell (Part # 839-882C) (#2) into
closed center sleeve (#1) opening. This converts it to
a power beyond sleeve.
a. Return hose must be connected to the return
section of the valve at point “A” and with the other
end to the tractor.
6. Install a high pressure hose going to the inlet of
another valve (front loader valve). This hose is not
furnished.
b. Remove elbow at point “B” and install the closed
center sleeve (#1). Use the plug (#2) that was
removed from port “A” to plug the sleeve.
7. If the return hose was installed at Point “B” it must
be relocated and installed at point “A” of the outlet
section. Remove the O’Ring plug and install one
839-768C adapter. Connect the return hose to the
elbow and the other end to the oil sump of the tractor.
c. With the removal of the O-Ring plug from the front
of outlet section of the valve Point “A” and
replace with a 839-768C O-Ring adapter.
Connect return line to the adapter and return to oil
sump of the tractor.
19516
B
B
A
A
19386
Power Beyond Hydraulic Systems
Closed Center Hydraulic Systems
Figure 1-1
Figure 1-2
This procedure converts the valve to a closed center
operation. If the valve is set for closed center operation,
it may be converted back to open center by reversing the
above procedure.
Choose the Appropriate Hosing.
Independent P.T.O.
Hydraulic Pump System
Power Beyond Hydraulic System
Install the independent hydraulic system onto the
backhoe according to the following procedures. Refer to
Figure 1-3 and Figure 1-4 for the identification of the
parts. During the assembly, use pipe compound on all
pipe fittings. None is required on the O-Ring fittings.
If you wish to run both a loader and a backhoe from the
same hydraulic system, make your connection as
illustrated in Figure 1-2. Since there are so many
variations for this type of setup, we are showing only a
generalized hosing scheme. If you have any questions
concerning the specifics for your situation, please
contact your dealer before attempting operation.
a. Insert the filter into the SUCTION PORT of the
reservoir. This is the port that is located on the left
side of the reservoir.
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Land Pride
Section 1: Assembly and Set-Up
b. Attach the 1/2” street ell to the RETURN PORT on
the reservoir. This is the port located on the right
side of the reservoir.
!
CAUTION!
The hydraulic valve can be damaged by:
c. Attach the reservoir to the backhoe as shown in
the drawings that come with the pump kit.
1. Reversing the flow of oil through the valve.
d. Bolt the torque bar to the flange mounting of the
pump. Use the bolts, lock washers and nuts
supplied.
2. Hydraulic lines disconnected during transport.
3. Disconnecting the return line while the tractor is
running.
e. Connect all fittings as illustrated in the instruction
with the PTO hydraulic pump kit for your backhoe.
4. A faulty quick coupler.
5. More than 12 GPM of oil flow while operating the
backhoe.
!
CAUTION!
6. By connecting the backhoe to a tractor valve and
actuating the valve in the wrong direction causing a
reverse flow through the backhoe valve.
Do not connect the pressure supply hose to return port of the
backhoe valve. This will destroy a hydraulic pump in seconds.
IMPORTANT: If removing backhoe from tractor,
quick coupler reconnections should be made with
tractor engine off.
!
CAUTION!
This power beyond circuit should be used only when powering
your tractor and backhoe from a tractor internal system where
you have relief valve protection of the pump. If it is used on an
external pump, disconnection of any quick-coupler with the
engine running will result in almost certain pump damage.
Pressure Line
Power Beyond
Circuit When Backhoe
is Removed
Outlet
Quick Coupler
Inlet Valve of
Backhoe Valve
Tractor Loader
(Female)
Valve
Return Hose From
Tractor Valve To Sump
(Male)
Pump
Inlet
Valve
(Male)
(Female)
Tee
Tank
Press.
Oil Reservoir
(Backhoe,
Loader or
Tractor Sump)
Quick Coupler
Suction Hose To Pump
Return Hose From
Backhoe Valve
Suction Filter
(Loader or Backhoe)
Pressure Hose
From The Pump
Power Beyond Independent Hydraulic Systems
Figure 1-3
19388
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Land Pride
Section 1: Assembly and Set-Up
Pressure Line
Circuit when Backhoe
is removed
Quick Coupler
Inlet Valve of
Backhoe Valve
Press.
Tank
(Female)
(Male)
Pump
(Rear, Front or Tractor)
Return Outlet
Oil Reservoir
(Backhoe or
Tractor Sump)
(Male)
(Female)
Suction Filter
(Backhoe, Tractor)
Quick Coupler
(Male)
Return Port
Valve Return Hose
Tractor Loader Valve
(Female)
Power Beyond Port
19548
Quick Coupler
Inlet of Valve
Backhoe Independent Hydraulic Systems
Figure 1-4
low speed while actuating the stabilizer control in the UP
position until the cylinder is entirely collapsed, continue
holding the control lever and read the PSI on the gauge.
Next, speed the tractor up. If the PSI increases as the
speed increases, this indicates a worn pump. If the PSI
remains steady, but less than 2250 lbs, then the
Testing Procedure for
Hydraulic Circuits
Identification of terminology:
1. PSI (Pounds per square inch)-Represents Power
2. GPM (Gallons per minute)-Represents Speed
backhoe’s master relief is set too low (See HOW TO SET
PRESSURE ON MAIN RELIEF VALVE section).
A glycerin filled hydraulic pressure gauge (located on the
right hand side of the valve) is factory installed on your
Land Pride Backhoe for your convenience in testing and
diagnosing any problem that may arise in the backhoe
hydraulic system.
!
CAUTION!
Never attempt to adjust any relief valve without a gauge in a
pressure line.
The gauge indicates only PSI, but with proper use, one
can diagnose almost any hydraulic problem in a
backhoe’s hydraulic system. The first thing to remember
is the backhoe hydraulic valve is made of six individual
valves, each doing a single function. The only thing that
is common to the valve bank is the hydraulic valve and
the master relief valve.
Checking a Single Circuit
If the power or speed goes down on one function the
problem is in that valve section, circuit relief, cylinder, or
a restriction in the hoses (The boom and stick are
restricted to prevent sudden drop). To check the
individual circuit, move the cylinder to the end of its
stroke, and continue holding the valve, then take a
pressure reading and compare the readings, they should
be the same. If they are not the same it could be a faulty
circuit relief. Circuit reliefs are on the down stroke of the
Testing Open Center System
Check the pump and master relief: If a problem exists on
all hydraulic circuits, the pump or master relief usually
causes it. To check these, operate the tractor at a very
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Land Pride
Section 1: Assembly and Set-Up
boom, the power crowd side of the dipper stick, and both
sides of the swing. If the circuit relief is faulty, it could be
caused by dirt. This could be rectified by removing and
cleaning the circuit relief. See instructions for Circuit
Relief Valve.
not return to the original reading, this would indicate a
faulty cylinder or circuit relief. Circuit reliefs are on the
down stroke of the boom, the power crowd side of the
dipper stick, and both sides of the swing. If the circuit
relief is faulty, it could be caused by dirt. This could be
rectified by removing and cleaning the circuit relief.
Checking the Cylinders
Checking the Pump
Take a reading at idle speed, with cylinder at end of
stoke. Next take another reading at high speed. If the
pressure increases with speed, it would indicate a faulty
cylinder.
If the tractor’s PSI is rated at 2250 lbs, and the gauge
reads less, the tractor’s hydraulic system is faulty or the
backhoe’s valve is improperly set for closed center
operation. See Closed Center Hydraulic System Section.
Return Hose:
Checking The Cylinders
If the return hose bursts, check to see if the high-
pressure line is connected to pressure port of the
backhoe, or if the return hose is restricted (usually by an
oil coupler).
Take a pressure reading at idle speed, with cylinder at
end of stoke. Next take another pressure reading at high
speed. If the pressure increases with speed it would
indicate a faulty cylinder.
Testing Closed Center System
For other hydraulic problems refer to Troubleshooting
Section.
On a closed center system the gauge will read the same
as the tractor’s system pressure rating. (e.i. older Closed
Center John Deere’s will read 2200 to 2250 PSI)
Before calling your dealer, fill in the Hydraulic Testing
Chart below. The chart below will enable the service man
to diagnose nearly all-hydraulic problems you may be
having with your backhoe. Be certain that the cylinder is
at the end of the stroke when the readings are taken.
Checking a Single Circuit
If there is a loss of power on one circuit, it may be
checked by actuating the valve. The pressure should
drop until the end of cylinder stroke, if the pressure does
Hydraulic Testing Chart
Cylinder Function*
PSI Idle Speed
PSI Full Speed
Stabilizer - Up R.H.
Stabilizer - Down R.H.
Stabilizer - Up L.H.
Stabilizer - Down R.H.
Dipper Stick - In
Dipper Stick - Out
Swing - Left
Swing - Right
Bucket - Open
Bucket - Closed
Boom - Up
Boom - Down
* Reder to Figure 1-5 on Page 13 for Cylinder Locations.
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Section 1: Assembly and Set-Up
the tractor so that it starts a flow to the backhoe valve,
and secure it in full open position.
Using Tractor Hydraulics All Tractors
If you wish to use the tractor hydraulic system, consult
the dealer of your tractor for a safe and proper method of
connecting the Land Pride BACKHOE to your tractor.
The above procedure results in a direct connection to the
JOHN DEERE master pump, and eliminates a return into
the rear transfer pump chamber. The problem with
returning oil into the rear transfer pump chamber is that if
the tractor engine RPM is throttled down to a point at
which the oil transfer pump cannot supply sufficient oil to
the main system pump, the main pump runs out of oil in
its sump and starts chattering.
Using Tractor Hydraulics John Deere
The return hose supplied with your Backhoe will not be
long enough. You will have to purchase a 1/2” return
hose with a length suitable for the following procedure.
Purchase a Port Filter Cover (JOHN DEERE Part
number AT301970) from your dealer if filter cover is not
already ported for an auxiliary return line. Install it on
your tractor.
Mounting The Backhoe
IMPORTANT: Make sure that there is sufficient
clearance for the operator if the backhoe is mounted
to a tractor with a cab or is equipped with a ROPS.
The ROPS may need to be extended or flipped
around to obtain sufficient clearance.
NOTE: Many newer John Deere tractors will already
be equipped for this return hose porting through
filter cover cap back to transmission sump.
Attach the backhoe’s pressure hose to the tractor quick
coupler. Attach the backhoe’s return hose to the port
filter cover that you installed. Move the control lever on
Description of Major Backhoe Parts
Refer to Figure 1-5:
1. Familiarize yourself with all of the terms in the
following instructions “Description of Major Backhoe
Parts”.
Dipper Stick
Cylinder
Boom
Boom Cylinder
(Inside Boom)
Stabilizer
Cylinder R.H
Bucket
Cylinder
Main Frame
Stabilizer Cylinder L.H
Stabilizer
Dipper Stick
Swing Cylinder L.H
Description of Major Backhoe Parts
Figure 1-5
20555
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Section 1: Assembly and Set-Up
2. Back tractor against backhoe in mounting position.
3. Connect tractor’s upper 3-point to backhoe.
4. Apply hydraulic power to the backhoe.
6. Remove the pin (#3) and extend the dipper stick
cylinder until the rod end lines up with the holes in the
dipper stick, re-install pin (#3), bolt (#1) & lock nut
(#2). Refer to Figure 1-7.
5. Raise the boom to take the tension off of the boom
lock so you can release the lock. Figure 1-6.
Dipper Cylinder Installation
Figure 1-7
20559
!
CAUTION!
Keep all people clear of your work area during the next steps.
Until the backhoe is securely mounted, the operator should
make sure that no portion of his body is beneath any part of the
backhoe.
7. Extend boom and lower dipper stick until they
contact the ground.
8. By manipulating the cylinder and placing down
pressure on the boom and stabilizers, lift the
backhoe vertically to approximately 10” to 12” of
ground clearance.
20557
Transport Lock
Transport Lock
Figure 1-6
10” to 12”
19380
Ground Clearance
Figure 1-8
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Section 1: Assembly and Set-Up
9. Attach the backhoe to the lower lift arms of the tractor
using the pins that are attached to the pallet. Refer to
Figure 1-9.
14. Once an appropriate set of holes is found, secure the
backhoe to the top link using the two 7/8” x 2-1/2”
bolts and hardware that were removed in Step 20.
10. Remove the two 7/8” bolts in order to free the top link.
Refer to Figure 1-9.
!
WARNING!
11. Mount the top link to the tractor. There is no correct
side up for the top link. There are four different offset
positions for the top link’s vertical and horizontal
adjustment to match backhoe frame depending on
your tractor’s 3-point.
Tractor roll bars and tractor cabs can present a danger in the
operation of a three point mounted backhoe. We do not
recommend the use of a three-point backhoe in conjunction with
either a roll bar and/or a tractor cab.
12. Mount the top link of the backhoe to the main frame
of the backhoe. To do this, maneuver the backhoe
until you can align two holes in the backhoe frame
with a set of holes in the top link. It is important to
pick a set of holes that places the backhoe in a
vertical position in relationship to the ground with a
10” to 12” ground clearance. There are four possible
positions.
!
WARNING!
Tractors with cabs must have at least 24” minimum clearance
between the end of lower links and tractor cab. Operator must
have at least 8” clearance between his back and tractor cab.
!
WARNING!
7/8” Bolts
Tractor should be equipped with a front end loader or
equivalent front-end weight for safe and stable operation.
!
CAUTION!
No warranty shall be allowed as to the attachment of the
backhoe to specific tractors. It is beyond our control that tractor
manufacturers make changes which may require minor
alterations of the BH3512.
Top Link
!
CAUTION!
For tractors with a top link draft control system, make sure the
draft control is in its heavy position. It is very important to
prevent the top link from exerting pressure that may activate the
draft control system. Continued operation with the draft control
system activated can cause overheating of the hydraulic fluid
and can cause tractor hydraulic pump failure. Put the draft
control lever to the bottom of the quadrant.
Tractor Lower Links
Mounting Top Link
Figure 1-9
13. If you have to make adjustments, make sure that the
backhoe tilts towards the tractor rather than away. If
you cannot find a satisfactory set of holes, turn the
top link upside down and try again. In some cases it
may be necessary to drill additional holes in the top
link or to shorten the top link.
!
WARNING!
You must secure the backhoe top link to the main backhoe frame
with TWO 7/8” x 2-1/2” bolts and hardware. EXTREME
DANGER exists to the operator if the procedure is not properly
followed.
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Section 1: Assembly and Set-Up
Bucket Installation
Refer to Figure 1-10:
Assemble the bucket (#1) with the pins (#2) and roll pins
(#3) as shown.
Tractor Lower Link
Bucket Installation
Figure 1-10
Locking Bar Installation
Figure 1-9
19369
Seat Assembly
Locking Bar Installation (Optional)
Refer to Figure 1-11:
1. After the backhoe is attached to the tractor in working
position proceed with the following steps to install the
lower drawbar link locks in Figure 1-9.
Assemble the seat as shown with the 3/8” flange nuts.
Adjust seat positioning to your comfort by releasing latch
located beneath the front of the seat.
2. Install pins (#3) through eyebolt (#2) with the
eyebolts being located on each side of backhoe
lower link sockets. Secure pins in place with lynch
pins(#4).
3. Install lower link lock angles right (J) and left (K) as
indicated in the drawing. Place lockwashers (L) and
install nuts (M) on eyebolts and snug nuts in place.
4. Adjust the 3/4” bolt against the tractor drawbar link.
Lock adjustment screw (N) with locknut (O).
5. Tighten eyebolt (#2) with nut and jam nut.
Seat Assembly
Figure 1-11
19368
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Section 2: Operating Instructions
Section 2: Operating Instructions
IMPORTANT: When loading or unloading, dipper stick Must be extended to avoid contact with ground. Failure to
do so may result in serious damage to backhoe assembly. Refer to Figure 2-1.
19563
Unloading Backhoe From Trailer
Figure 2-1
Preparing For Operation
Preparing The Backhoe
Unlock the boom lock. You may have to raise the boom in
order to relax the tension on the lock.
IMPORTANT: If you are not familiar with the
operation of the Backhoe, DO NOT PROCEED until
you have studied the following “Transporting the
Backhoe” section.
Preparing The Tractor
Move the tractor’s gearshift lever to a neutral position.
Set the engine throttle to the correct RPM. For added
stability, lower the front-end loader to the ground (if
equipped). Move the draft control lever to the bottom-
most position (Refer to your Tractor Operator’s Manual
for Draft Control Terminology). If you are using an
independent hydraulic system, engage the PTO.
Transporting The Backhoe
!
CAUTION!
While traveling with the backhoe, the tractor must have at least
20% of the combined tractor and backhoe weight on its front
wheels. Add additional front-end weight, if necessary, to meet
this requirement. This is necessary in order to maintain
complete control of the tractor during travel.
Operating The Backhoe
When loading or unloading from the trailer, you may
need to extend the dipper stick out to keep the bucket
from dragging. Refer to Figure 2-1.
!
CAUTION!
Operate the backhoe only from the backhoe operator’s seat. Be
sure to place your feet on the footpads during operation. This
protects them from injury that could result from moving parts.
Your backhoe comes equipped with a transport lock. See
Figure 1-6 on page 14. This transport lock should be put
into proper position anytime you are transporting your
backhoe. To ready your backhoe for transport, perform
the following:
!
CAUTION!
For tractors with a top link draft control system, make sure the
draft control is in its heavy position. It is very important to
prevent the top link from exerting pressure that may activate the
draft control system. Continued operation with the draft control
system activated can cause overheating of the hydraulic fluid
and can cause tractor hydraulic pump failure. Put the draft
control lever to the bottom of the quadrant.
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Section 2: Operating Instructions
When hauling the backhoe on a trailer lower the dipper
stick to the trailer if possible. See Figure 2-2.
Control Functions
Refer to Figure 2-3:
In front of you there are four control levers. Right and Left
are determined from a seated position in the operator’s
seat.
Refer to “Description of Major Backhoe Parts”
Figure 1-5 on page 13 for the following controls.
Stabilizers
To the outside of the operator’s console are the controls
for the stabilizers. The left lever controls the left
stabilizer, and the right lever controls the right stabilizer.
To raise the stabilizers, pull the levers towards yourself.
To lower the stabilizers, push the levers forward (away
from yourself).
19564
Transporting on Trailer
Figure 2-2
Boom
Observe the following precautions while transporting the
backhoe with tractor:
The center lever on the left side of console controls the
boom up and down. Pulling the lever towards you raises
the boom; pushing the lever forward lowers the boom.
Pushing the lever further into detent float position
renders the valve functions inoperable.
1. When traveling on roads, use the proper safety lights
and warning signs. (Check your local regulations.)
2. When traveling over rough ground, do not exceed
safe speed limits.
Moving this lever to the left swings the boom to the left;
moving the lever to the right swings the boom to the right.
3. Do not make sudden starts or stops.
4. When climbing grades, be particularly careful not to
make sudden starts.
Dipper Stick And Bucket
The centered lever on the right side of console controls
the dipper stick in and out and the bucket curl and uncurl.
Pulling lever towards yourself moves the dipper stick in;
pushing the lever forward moves the dipper stick out.
Moving this lever to the left curls the bucket; moving the
lever to the right uncurls the bucket.
Familiarize yourself with these controls before beginning
to operate the backhoe. After a little experience, you will
be able to operate the unit with a smooth, steady motion.
UNLOAD
STABILIZER
DOWN
STABILIZER
DOWN
DIPPER
OUT
BOOM
DOWN
SWING
LEFT
SWING
RIGHT
BUCKET
CURL
BUCKET
UNCURL
RIGHT
LEFT
STABILIZER
UP
BOOM
UP
STABILIZER
UP
DIPPER
IN
Control Levers
Figure 2-3
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Section 2: Operating Instructions
The following suggestions should aid you in gaining
maximum efficiency with your backhoe.
Digging Suggestions
Digging at the Correct Angle
Dipper Stick & Boom
To obtain the best penetration, the dipper stick should be
at an angle. Do not extend the boom and the dipper stick
out into a straight line. See Figure 2-4.
!
CAUTION!
Always be sure that the stabilizers maintain contact with the
ground during digging operations. Take the time to readjust the
stabilizers when necessary during digging. Before you begin
digging, extend the stabilizers so that they make a firm contact
with the ground. This is essential in order to gain the necessary
stability and weight transfer to insure safe digging.
Observe the following cautions while digging.
!
CAUTION!
Before swinging the backhoe, make sure you have room to swing
and that all people are clear of the backhoe. For added
protection, place a barricade around the swing area before
commencing operation.
!
CAUTION!
Be sure that you are not digging over any underground wiring,
pipes, or other obstructions. If there is any doubt, call your
public service agency.
19374
Correct Angle
!
CAUTION!
When digging to either side and/or close to the tractor, be
extremely careful that the bucket does not contact the
stabilizers, as serious damage may occur.
19375
Incorrect Angle
!
CAUTION!
Be extra careful when working on hillsides and/or close to
ditches. It is always extremely dangerous to work in a position
where the danger of tipping or sliding exists.
Dipper Stick & Boom Digging Angle
Figure 2-4
!
CAUTION!
Digging on a slope should be done from the top down. When
digging across a slope, use the stabilizers to keep the backhoe
level and ALWAYS dump uphill. Use caution when digging under
these conditions. Move the unit carefully and at a safe ground
speed.
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Section 2: Operating Instructions
Bucket
side so as not to run out of dumping room. It is desirable
while swinging to the side to make contact with the
already removed material in order to lessen shock on the
machine. This also aides the operator in pushing the
material away from the working area.
After you have filled the bucket, do not pull the dipper
stick any closer to the boom than is necessary in order to
clear the hole. When the bucket is clear, swing it to the
side to dump. Always start dumping far enough to the
19376
19377
Incorrect Angle
Correct Angle
Bucket Digging Angle
Figure 2-5
The length of the pass should be just long enough so that
When loading trucks, curling the bucket close to the
dipper stick will prevent undue spillage when the bucket
is raised so that it can be dumped in the truck bed.
the bucket will be full at the end of the pass. The depth of
the pass will depend upon the type of soil. Do not drag a
full bucket of dirt. After making a pass you will be able to
determine how deep you will be able to dig. To control
the depth of the pass, work the bucket and dipper stick
controls alternately, In this way you can take an even bite
each time you make a pass and obtain a full bucket.
Refer to Figure 2-6.
To obtain a level bottom, set the bucket teeth at a slight
angle. Keep this angle as you drag the bucket with the
dipper stick by gradually uncurling the bucket.
Intermittently pull the boom lever at the same time to
maintain a level bottom.
19371
Level Bottom
Figure 2-6
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Section 3: Maintenance and Lubrication
Section 3: Maintenance and Lubrication
Maintenance
Proper servicing and adjustment can increase the life of
any implement. With careful and systematic inspection,
you can avoid costly maintenance, time and repair.
Bucket Tooth Replacement
To remove a tooth:
1. Heat the tooth with a torch at point “A” (this is the
compressed area that overlaps “B”).
2. Hammer at the top of the tooth until the tooth comes
free from the shank.
!
CAUTION!
For safety reasons, each maintenance operation must be
performed with the backhoe lowered completely to the ground
or folded with the transport boom lock engaged and the tractor
engine shut off with ignition key removed.
To replace a tooth:
1. Hammer the tooth onto the shank.
2. Heat at point “A” and hammer the heated section into
recess “B”.
• After using the backhoe for several hours, check all
bolts to be sure they are tight.
• Lubricate items as listed under Lubrication, this
section, starting on page 22.
• Replace any worn, damaged or illegible safety labels by
obtaining new labels from your Land Pride Dealer.
Information about labels is located under Safety Labels in
the “Important Safety Information” section starting on
Storage
For short periods coat all exposed cylinder shafts with
grease or a corrosion preventive.
B
Install dust caps on the quick couplers, if equipped, to
prevent dirt contamination of the hydraulic system. Or, if
possible, connect the quick couplers together.
A
A
At the end of the working season or when the backhoe
will not be used for a long period, it is good practice to
clean off any dirt or grease that may have accumulated
on the backhoe and any of the moving parts. It may be
necessary to scrape off compacted dirt from the bucket,
then use a garden hose to thoroughly clean the surface.
19382
Bucket Tooth Replacement
Inspect the backhoe for loose, damaged or worn parts
and adjust or replace if needed.
Figure 5-1
Lubricate as noted in the Lubrication portion of this
section starting on page 22.
Repaint parts where paint is worn or scratched to prevent
rust. Aerosol touch-up paint is available from your Land
Pride dealer. Order Land Pride part # 821-002C for
Black.
Store backhoe in a clean, dry place.
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Section 3: Maintenance and Lubrication
Lubrication
Multipurpose
spray lube
Multipurpose
grease lube
Multipurpose
oil lube
Intervals at which
lubrication is required
Lubrication
Legend
50
25
Bucket Pivot
Type of Lubrication: Multipurpose Grease
Quantity = As required
25
25
Bucket Cylinder Base End
Type of Lubrication: Multipurpose Grease
Quantity = As required
20555
Dipper Stick Pivots
Type of Lubrication: Multipurpose Grease
Quantity = As required
20556
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Section 3: Maintenance and Lubrication
25
25
Boom Cylinder Rod End
Type of Lubrication: Multipurpose Grease
Quantity = As required
20557
Boom Pivot
Type of Lubrication: Multipurpose Grease
Quantity = As required
20555
25
Boom Cylinder Base End
Type of Lubrication: Multipurpose Grease
Quantity = As required
20556
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Section 3: Maintenance and Lubrication
25
Stabilizer Arms
Type of Lubrication: Multipurpose Grease
Quantity = As required
20555
25
25
Boom Swing Cylinder Rod End
Type of Lubrication: Multipurpose Grease
Quantity = As required
20555
Boom Swing Cylinder Base End
Type of Lubrication: Multipurpose Grease
Quantity = As required
20558
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Section 4: Specifications & Capacities
Section 4: Specifications & Capacities
BH35 Series Backhoes
BH3512
Tractor Horse Power Rating 50 -150
Maximum Digging Depth 12’ 6”
Digging Depth 2” Flat Bottom 12’
Reach from Swing Pivot 14’ 6”
Transport Height 9’ 3”
Bucket Clearance or Loading Height 9’ 2”
Bucket Curl 172 deg.
Swing Arc 180 deg.
Stabilizer Spread-Folded Down, Operating Position 10’ 7”
Stabilizer Spread-Folded Down, Transport Position 6’ 5”
Hydraulic System Four Lever 6-spool control valve
Main Circuit Relief 2250 PSI
four individual circuit reliefs
Hydraulic Fluid Minimum 8.0 GPM
Hydraulic Fluid Maximum 11.0 GPM
Boom Lifting Power 1729 lbs. (less bucket)
(boom straight out, dipper stick at 90 deg.)
Boom Lifting Power 900 lbs.
(boom and dipper stick extended.)
Bucket Cylinder Digging Force 5,500 lbs.
Dipper Stick Cylinder Digging Force 3,300 lbs.
Bucket Pryout Power (partially curled) 12,500 lbs.
Tractor 3-Point Hitch Cat. 2 & 3
Hydraulic Cylinders Equipped with NitroSteel corrosive resistant black shafting
Swing Cylinders Dual
Swing Shock Absorbers Hydraulic swing cushion protection
Pins Locked in place, grease zerks at pivot points
Transport Lock Safety transport boom flip-over lock
Bushings Replaceable, steel, at all major pivot points
Hydraulic Pressure Gauge Standard
Adjustable Hinged Seat Standard
Ripper Tooth Optional
Locking Bar Mount Optional
Independent Hydraulic System Optional
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Section 5: Features and Benefits
Section 5: Features and Benefits
BH35 Series Backhoes
Features
Benefits
Tractor HP range 50-150 HP
Hitch – 3-Point Rigid Hitch Mount with Stabilizing Kit for Maximum digging stability.
Tubular Construction Tubular and box designed frame, on boom and dipper stick assemblies for added strength
and longer life.
Relief Valve Protection One master and four circuit relief valves with anti-cavitation feature to protect against
accidental overloads and errors in operation.
Wide Stance Stabilizer Legs Wide support base with large steel foot pads for more stable and safer operational control.
Optional Rubber Street Pads Rubber pads can be added to steel stabilizer pads when using on concrete to keep from
sliding.
Plated and Locked Wear Pins Plated and locked pins on all pivot points for added safety.
Pivot Point Replaceable All pivot points have replaceable and greaseable plated wear bushings for longer life.
Bushings
Double Acting Cylinders With Nitro-Steel black piston rods for superior wear and corrosive resistance over chrome
shafts. High quality internal seals for dependable long life performance.
Six spool valve Two lever hydraulic valve with excellent feathering characteristics and minimum cylinder
cavitation for easy operation and control.
Safety Boom Lock Standard on all models for transportation safety.
Hydraulic Swing Patented swing cushion slows down and stops swing automatically, prevents ‘shock loads’ at
Cushion Protection the end of arm travel.
Two Double Acting One cylinder pushing and one pulling for a powerful, smooth and controllable swing arch.
Swing Cylinders
Lower Drawbar Link Locks Standard on all models for more stability in operation and less stress in transportation.
Hydraulic Hose Protection Abrasive-resistant coverings for longer life.
Adjustable Folding Seat Offering more comfort and room for operation and less operator fatigue.
Hydraulic Pressure Gauge Kit Standard equipment and positioned on control valve for easy observation.
Independent Hydraulic System Optional with 540 gear type pump
Bucket Options 12” to 36” Bucket options
Power Beyond Option Control valve adaptability - available as an optional kit.
Digging Depth Maximum 12’ - 6”
Range
Maximum Reach from Swing 14’ - 6”
Point
Swing Arch 180 degrees
Bucket Rotation 172 degrees
Bucket Pry Out Power 12,500 lbs.
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Section 6: Troubleshooting
Section 6: Troubleshooting
Problem
Cause
Solution
Excessively high oil temperature.
Dirt in oil.
Eliminate restrictions in pipe lines and filtering system.
Change oil-clean system.
Check torque.
Sticking plungers in
Hydraulic Valve
Pipe fittings too tight.
Valve warped from mounting.
Excessively high pressure in valve
Handle or linkage binding.
Plunger bent.
Loosen valve and check.
Check with gauge on inlet and cylinder lines.
Free up linkage.
Replace valve or section.
Replace faulty parts.
Return spring damaged.
Spring or detent cap binding.
Valve not at thermal equilibrium.
Paint on or under seal.
Excessive back pressure.
Dirt under seal.
Loosen cap, re-center and re-tighten.
Let system warm up.
Remove and clean.
Leaking Seals in
Hydraulic Valve
Open or enlarge line to reservoir.
Remove and clean.
Scored plunger.
Replace valve or section.
Clean and tighten.
Loose seal plates.
Cut or scored seal.
Replace faulty parts.
Dirt in valve.
Clean and flush out.
Unable to move plunger
in Hydraulic Valve
Plunger cap full of oil.
Bind in linkage.
Replace seals.
Free up linkage.
Improperly connected.
Replace O-Ring seals. Make sure all connections are as
shown in the assembly section of this manual.
Blown or leaking O-ring
seals between valve sec-
tions in Hydraulic Valve
Return line was replaced with high
pressure hose.
Replace O-Ring seals. Remove high pressure hose and
replace it with correct low pressure hose.
Valve used in power beyond applica- Replace O-Ring seals. Install power beyond sleeve as
tion without installation of power
beyond sleeve.
shown in assembly section of this manual.
Poppet stuck open or dirt under
seat.
Check for foreign matter between poppets and their mat-
ing members. Members must slide freely.
Can’t get pressure in
Relief Valve
Pilot poppet seat damaged. Poppet
sticking in relief valve housing.
Remove and clean dirt out. If parts are damaged, replace
complete relief valve.
Erratic pressure in Relief
Valve
Wear due to dirt. Locknut and
adjustment screw loose.
See “How to Set Pressure”.
Check seats for scratches, nicks or other marks. Replace
valve if damaged.
Pressure setting not
correct in Relief Valve
Damaged seats, worn O-Rings,
parts sticking due to dirt.
Replace worn or damaged O-Rings and back up rings.
Inspect for free movement of components, check seat for
scratches, nicks or other marks. Replace complete relief if
metal parts are damaged.
Relief Valve leaks
Low oil supply.
Add oil.
Backhoe does not
operate
Hoses not properly connected.
Worn or damaged pump.
Broken line.
Check hose connections.
Replace or repair pump.
Check for leaks. Replace line.
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Land Pride
Section 6: Troubleshooting
Problem
Cause
Solution
Engine speed too low.
Defective pump.
Adjust RPM’s.
Slow operation and poor
Hydraulic System
performance
Check pressure or replace.
Check line pressure.
Clean or replace main relief valve.
Replace valve section.
Clean.
Load too heavy.
Faulty main relief valve.
Internal valve crack.
Suction line filter plugged.
Oil too heavy for cold weather use.
Replace with lighter oil.
Power supply may not be plumbing
enough oil.
Use a flow meter to check out whether 4-8 GPM flow rate
is being achieved.
Low oil level.
Add oil.
Pressure line restricted.
Collapsed suction line.
Valve spool not at full stroke.
Cylinder seals leaking.
Valve spool leaking.
Check for obstruction.
Check for damage.
Check movement and linkage.
Replace seals.
Backhoe does not hold
up load
Replace seals.
Oil bypassing valve spool.
Dirt in load check valve.
Replace valve bank.
Disassemble and clean.
Load drops when valve
spool moved from
neutral
Damaged or worn pump.
Repair or replace.
Reduce throttle.
Excess oil heat
Too fast of an engine speed.
Main relief bypass valve improperly
set.
Check relief setting.
Draft control lever not all the way
down.
Position correctly.
Valve spool seals.
Loose hose fittings.
Broken oil line.
Replace seals.
Oil leakage
Tighten just enough to stop leakage.
Replace hose or line.
Improperly set relief valve.
Set relief at 1400 PSI.
Independent Hydraulic
system pump failure
Suction line filter plugged.
Oil too heavy.
Clean filter.
Independent Hydraulic
system pump Noisy
Use a lighter oil.
Air in system.
Check for loose connections and/or cycle all valves to
remove air.
Jerky or erratic action
Wrong type of oil.
Foamy oil.
Check tractor manual. For Independent Hydraulic System
use Type A non-foaming hydraulic oil.
Check tractor manual. For Independent Hydraulic System,
use a Type A non-foaming hydraulic oil.
Improperly connected.
Make sure all connections are as shown in the assembly
section of this manual.
Blown Return Valve
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Land Pride
Section 7: Appendix
Section 7: Appendix
Torque Values Chart
Bolt He a d Id e ntific a tion
Bolt He a d Id e ntific a tion
8.8
10.9
5.8
Class 5.8
Class 8.8
Class 10.9
Grade 2
Grade 5
Grade 8
1
3
in-tpi
1/4" - 20
1/4" - 28
N · m ft-lb N · m ft-lb N · m ft-lb
mm x pitch N · m ft-lb N · m ft-lb N · m ft-lb
7.4
8.5
15
5.6
11
8
16
12
M 5 X 0.8
4
3
6
5
9
7
6
13
10
18
14
M 6 X 1
7
5
11
8
15
11
5/16" - 18
5/16" - 24
3/8" - 16
3/8" - 24
7/16" - 14
7/16" - 20
1/2" - 13
1/2" - 20
9/16" - 12
9/16" - 18
5/8" - 11
5/8" - 18
3/4" - 10
3/4" - 16
7/8" - 9
11
24
17
33
25
M 8 X 1.25 17
12
26
19
36
27
17
13
26
19
37
27
M 8 X 1
18
33
13
28
21
39
29
27
20
42
31
59
44
M10 X 1.5
24
52
39
72
53
31
22
47
35
67
49
M10 X 0.75 39
M12 X 1.75 58
29
61
45
85
62
43
32
67
49
95
70
42
91
67
125
130
145
200
l215
315
335
405
485
610
900
93
49
36
75
55
105
145
165
210
235
285
325
510
570
820
905
78
M12 X 1.5
M12 X 1
60
44
95
70
97
66
49
105
115
150
165
205
230
360
405
585
640
875
955
76
105
120
155
170
210
240
375
420
605
670
90
66
105
145
155
225
240
310
350
440
650
760
830
77
105
150
160
230
245
300
355
450
665
75
55
85
M14 X 2
92
68
105
115
165
180
230
260
325
480
560
610
95
70
110
120
150
170
265
295
430
475
645
705
M14 X 1.5
M16 X 2
99
73
105
130
150
235
260
225
250
340
370
480
540
680
750
890
79
145
155
195
220
280
310
480
525
960
105
115
145
165
205
230
355
390
705
97
M16 X 1.5
M18 X 2.5
M18 X 1.5
M20 X 2.5
M20 X 1.5
M24 X 3
110
170
190
165
185
250
275
355
395
500
555
655
7/8" - 14
1" - 8
1050 780
1150 845
1230 910
1350 995
1750 1290
1960 1440
M24 X 2
1" - 12
M30 X 3.5
M30 X 2
1510 1120 2100 1550
1680 1240 2320 1710
1-1/8" - 7
1 1/8" - 12
1 1/4" - 7
1 1/4" - 12
1 3/8" - 6
1 3/8" - 12
1 1/2" - 6
1 1/2" - 12
1080 795
1210 890
1060 785
M36 X 3.5
1730 1270 2650 1950 3660 2700
1880 1380 2960 2190 4100 3220
1520 1120 2460 1820
1680 1240 2730 2010
1990 1470 3230 2380
2270 1670 3680 2710
2640 1950 4290 3160
2970 2190 4820 3560
M36 X 2
1
in-tpi = nominal thread diameter in inches-threads per in.
N· m = newton-meters
2
3
4
1010 745
1180 870
1330 980
ft-lb= foot pounds
mm x pitch = nominal thread diameter in millimeters x thread
pitch
Torque tolerance + 0%, -15% of torquing values. Unless otherwise specified use torque values listed above.
BH3512 Backhoes 340-131M
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Land Pride
Section 7: Appendix
Warranty
Land Pride warrants to the original purchaser that this Land Pride product will
be free from defects in material and workmanship beginning on the date of
purchase by the end user according to the following schedule when used as
intended and under normal service and conditions for personal use.
Overall Unit: One year Parts and Labor
Hydraulic Cylinder: One year Parts and Labor.
Hoses and Seals: Considered wear items.
This Warranty is limited to the replacement of any defective part by Land
Pride and the installation by the dealer of any such replacement part, and does
not cover common wear items such as blades, belts, tines, etc. Land Pride
reserves the right to inspect any equipment or parts which are claimed to have
been defective in material or workmanship.
This Warranty does not apply to any part or product which in Land Pride’s
judgment shall have been misused or damaged by accident or lack of normal
maintenance or care, or which has been repaired or altered in a way which
adversely affects its performance or reliability, or which has been used for a
purpose for which the product is not designed. Misuse also specifically includes
failure to properly maintain oil levels, grease points, and driveline shafts.
Claims under this Warranty must be made to the dealer which originally sold
the product and all warranty adjustments must be made through such dealer.
Land Pride reserves the right to make changes in materials or design of the
product at any time without notice.
This Warranty shall not be interpreted to render Land Pride liable for damages
of any kind, direct, consequential, or contingent to property. Furthermore, Land
Pride shall not be liable for damages resulting from any cause beyond its
reasonable control. This Warranty does not extend to loss of crops, any expense
or loss for labor, supplies, rental machinery or for any other reason.
No other warranty of any kind whatsoever, express or implied, is made
with respect to this sale; and all implied warranties of merchantability and
fitness for a particular purpose which exceed the obligations set forth in
this written warranty are hereby disclaimed and excluded from this sale.
This Warranty is not valid unless registered with Land Pride within 30 days
from the date of purchase by the end user.
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Corporate Office: PO. Box 5060
Salina, Kansas 67402-5060 USA
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