Instructions – Parts List
GH 733 Hydra–Sprayr
Sprayer
307616Z1
3500 psi (240 bar, 24 MPa) Maximum Working Pressure
Model 231733, Series E
Sprayer only. Has Severe-Duty* Displacement Pump
Model 230975
Includes Sprayer 231733, Hose, Swivel, Gun,
RACr X, DripLesst Tip Guard and SwitchTipt
*Severe-duty displacement pumps have an abrasion and corrosion-resistant displacement rod and
sleeve. Refer to the Technical Data in manual 311762.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
9089c
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
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WARNING
SKIN INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also
cause serious injury.
D Fluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
D Do not point the gun at anyone or at any part of the body.
D Do not put your hand or fingers over the spray tip.
D Do not stop or deflect leaks with your hand, body, glove or rag.
D Do not “blow back” fluid; this is not an air spray system.
D Always have the tip guard and the trigger guard on the gun when spraying.
D Check the gun diffuser operation weekly. Refer to the gun manual.
D Be sure the gun trigger safety operates before spraying.
D Lock the gun trigger safety when you stop spraying.
D Follow the Pressure Relief Procedure on page 10 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
D Tighten all fluid connections before operating the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do not
repair high pressure couplings; you must replace the entire hose.
D Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by
kinks or bends near the couplings.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
D Know the specific hazards of the fluid you are using.
D Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
D Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
FUEL HAZARD
The fuel used in this unit is combustible and when spilled on a hot surface can ignite and cause a fire.
D Do not fill the fuel tank while the engine is running or hot.
EXHAUST HAZARD
The exhaust contains poisonous carbon dioxide which is colorless and odorless.
D Do not operate this equipment in a closed building.
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WARNING
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
D If there is any static sparking or you feel an electric shock while using this equipment, stop spray-
ing immediately. Do not use the equipment until you identify and correct the problem.
D Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
D Keep the spray area free of debris, including solvent, rags, and gasoline.
D Disconnect all electrical equipment in the spray area.
D Extinguish all open flames or pilot lights in the spray area.
D Do not smoke in the spray area.
D Do not turn on or off any light switch in the spray area while operating or if fumes are present.
D Do not operate a gasoline engine in the spray area.
D Ground the sprayer to a true earth ground with the ground wire and clamp (supplied).
D Use only electrically conductive hoses.
MOVING PARTS HAZARD
Moving parts can pinch or amputate your fingers.
D Keep clear of all moving parts when starting or operating the sprayer.
D Before servicing the equipment, follow the Pressure Relief Procedure on page 10 to prevent the
equipment from starting unexpectedly.
NOTE: This is an example of the DANGER label on your sprayer. This label is available in other languages, free of
charge. See page 23 to order.
FIRE AND
EXPLOSION HAZARD
SKIN INJECTION
HAZARD
Spray painting, flushing or cleaning equipment with flammable
liquids in confined areas can result in fire or explosion.
Liquids can be injected into the body by high pressure airless
spray or leaks – especially hose leaks.
Use outdoors or in extremely well ventilated areas. Ground
equipment, hoses, containers and objects being sprayed.
Avoid all ignition sources such as static electricity from plastic
drop cloths, open flames such as pilot lights, hot objects such as
cigarettes, arcs from connecting or disconnecting power cords
or turning light switches on and off.
Keep body clear of the nozzle. Never stop leaks with any part of the
body. Drain all pressure before removing parts.Avoid accidental
triggering of gun by always setting safety latch when not spraying.
Never spray without a tip guard.
In case of accidental skin injection, seek immediate
“Surgical Treatment”.
Failure to follow this warning can result in death or serious injury.
Failure to follow this warning can result in amputation or serious
injury.
READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE
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Component Identification
HYDRAULIC RETURN LINE TO MOTOR
HYDRAULIC SUPPLY LINE TO MOTOR
MOTOR RESET BUTTON
HYDRAULIC MOTOR
HYDRAULIC
RESERVOIR
GASOLINE
FILL CAP
SUCTION TUBE
OUTLET
FITTING
PRESSURE
HYDRAULIC
PUMP
DRAIN VALVE
DISPLACEMENT PUMP
9089d
PRESSURE
CONTROL KNOB
SUCTION HOSE
Fig 1
Setup
1. Connect the Hose and Gun
c. Don’t use thread sealant on the swiveling nut
of the hose couplings, and don’t install the
spray tip yet.
a. Remove the plastic cap plug from the outlet
tee and screw an accessory, conductive or
grounded spray hose onto the 1/4 npsm(f) out-
let fitting. See Fig 1.
NOTE: Use thread sealant on all male threads except at
swivel unions. Swivel unions are made to self–
seal, and using thread sealant prevents the
swivel from turning freely.
b. Connect a small diameter, 3 ft (0.9 m) whip
hose between the main hose and a spray gun,
if desired, for more flexible gun movement.
2. Fill the Packing Nut/Wet Cup 1/3 full with Graco
Throat Seal Liquid (TSL), supplied. See Fig. 2.
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Setup
3. Check the Hydraulic Oil Level
GASOLINE
FILL CAP
a. Unscrew the hydraulic oil fill cap. See Fig 2.
The dipstick is attached to the cap. The oil
should be up to the full line on the dipstick.
OIL DIPSTICK
CAUTION
To prevent damage to the cooling system and
hydraulic pump, use only Graco Hydraulic Oil,
169236 (5 gal./20 liter) or 207428 (1 gal/3.8 liter).
Other types of hydraulic oil may damage the hydrau-
lic components.
b. Add oil as needed to the proper level. A
completely full hydraulic system contains
about 5 gallons (20 liters) of oil.
ENGINE OIL
FILL PLUG
7872b
Fig 3
HYDRAULIC OIL
PACKING
FILL CAP
4. Check the Engine Oil Level
NUT/ WET
CUP
a. Remove the dipstick. See Fig 3.
b. Check to be sure the oil is up to the full mark
on the dipstick.
c. If oil is needed, see the chart below for the
recommended oil type and weight.
d. Crank case capacity with filter: 2.1 quarts (2.0
liters)
RECOMMENDED LUBRICATION OIL: Use a high
quality detergent oil of American Petroleum Institute
(API) service class SG or SH for regular use and for
breaking in a new engine.
GRADE OF OIL CHART
SEASON OR TEMPERATURE
Spring, Summer, Autumn
30_F to 0_, Winter
GRADE OF OIL
SAE 10W–30
7871b
Fig 2
SAE 5W–20 or 5W–30
6
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Setup
5. Fill the Fuel Tank
6. Grounding
WARNING
FIRE AND EXPLOSION HAZARD
To reduce the risk of static sparking, fire
or explosion which can result in serious
bodily injury and property damage,
WARNING
FIRE AND EXPLOSION HAZARD
Fuel spilled on a hot surface can cause
a fire or explosion and serious bodily
injury and property damage. Shut off
engine and let it cool before filling the
tank. Carefully follow steps 5.a. to 5.c.,
below, being sure not to spill any fuel.
ground the sprayer, all system components, and
the object being sprayed as instructed under FIRE
OR EXPLOSION HAZARD on page 3.
Connect the ground wire and clamp (provided) to a
true earth ground. See Fig 4.
a. Close the fuel shutoff valve. See Fig 3.
b. Use only clean, fresh, well-known brands of
unleaded regular grade gasoline. The
minimum octane requirements are 87 octane
in the U.S.A. and 96 octane elsewhere.
c. Remove the gasoline fill cap and fill the tank.
Be sure the air vent in the fill cap is not
plugged so gasoline can flow to the carburetor,
then replace the cap. See Fig 3.
d. External fuel tank capacity: 6.0 gallons (22.7
liters)
CLAMP
e. Gasoline consumption at the maximum oper-
ating speed of 2900 RPM is about 1.3 gallons/
hour (4.9 liters/hour).
7873B
Fig 4
7. Flush the sprayer to remove the oil which was left
in the pump after factory testing to protect the
pump from corrosion. See Flushing.
8. Battery Maintenance
Always charge a new battery or a battery that has not
been in use for a long period.
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Flushing
When to Flush
4. Changing from oil–base to water–base paint.
Flush with mineral spirits, followed by soapy water,
then a clean water flush.
1. New sprayer. Your new sprayer was factory tested
with lightweight oil which was left in to protect
pump parts from corrosion.
5. Storage.
Water–base paint: flush with water, then mineral
spirits and leave the pump, hose and gun filled
with mineral spirits. Follow the Pressure Relief
Procedure Warning, page 10.
Oil–base paint: flush with mineral spirits. Follow
the Pressure Relief Procedure Warning, page
10.
Before using oil–base paint, flush with mineral
spirits only.
Before using water–base paint, flush with
mineral spirits, followed by soapy water, then a
clean water rinse.
2. Changing colors. Flush with a compatible solvent
6. Startup after storage.
such as mineral spirits.
Before using water–base paint, flush out mineral
spirits with soapy water and then clean water.
When using oil–base paint, flush out mineral
spirits with fluid to be sprayed.
3. Changing from water–base to oil–base paint.
Flush with soapy water, then mineral spirits.
How to Flush
8. Turn and hold the ignition key to START until you
hear the engine “catch”, then release the key to RUN.
See Fig 5. If the engine does not start, open the
choke a little (move lever). If the engine floods, open
the choke all the way and try again.
WARNING
SKIN INJECTION HAZARD
Follow the Pressure Relief Procedure
Warning on page 10. Remove the spray
tip before flushing.
CHOKE
1. Engage the gun safety latch. Remove the spray tip
from the gun.
ON/OFF
SWITCH
2. Pour enough clean, compatible solvent to fill the
pump and hoses into a large, grounded metal pail.
AIR FILTER
3. Place the suction tube into the pail or tilt the
sprayer back (it will support itself) and place the
pail under the pump. Then tilt the sprayer forward
to lower the pump into the pail.
PRESSURE
CONTROL
KNOB
4. Turn the pressure control knob counterclockwise
until all spring tension is relieved. You will be able
to feel it. The sprayer is now set at the lowest
pressure setting. Turning the knob further will
remove it. Tighten the knob locknut to set. See Fig
5.
BYPASS
VALVE
7874b
Fig 5
5. Open the bypass valve. The valve lever will be
parallel to the body of the valve. See Fig 5.
9. After the engine is warm, gradually open the choke
lever (move lever) and close the bypass valve.
See Fig 5.
6. Attach fuel hose from tank to engine.
10. Point the gun into the grounded metal pail and hold
a metal part of the gun firmly against the pail.
7. Close the choke by moving the choke lever. See
Fig 5.
NOTE: To save the fluid in the pump and hose, trigger
the gun into the paint container or a separate
clean container. At the same time, slowly turn the
pressure control knob clockwise just enough to
start the pump. When solvent appears, release
the trigger and continue as below.
CAUTION
The bypass valve must be opened when starting the
sprayer to prevent damaging the starter.
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Flushing
12. Circulate the solvent until the system is thoroughly
flushed.
WARNING
13. Release the trigger and engage the gun safety
latch.
FIRE AND EXPLOSION HAZARD
To reduce the risk of static sparking and
splashing when flushing, always remove
the spray tip from the gun and hold a
metal part of the gun firmly to the side of a
grounded metal pail.
14. If you are going to start spraying, place the
pump or suction tube into the supply container.
Follow the Pressure Relief Procedure on page
10. Engage the gun safety latch until you are ready
to prime the pump. See Step 3, page 9.
15. If you are going to store the sprayer, be sure
your final flush is with an oil–based solvent, such
as mineral spirits. Remove the suction tube or
pump from the solvent pail. Follow the Pressure
Relief Procedure on page 10. Engage the gun
safety latch, but leave the drain valve open.
11. Making firm metal-to-metal contact, hold the gun
firmly to the side of the grounded solvent pail.
Trigger the gun. At the same time, slowly turn the
pressure control knob clockwise just enough to
start the pump.
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Operation
Pressure Relief Procedure
2. Starting the Sprayer
a. Open the bypass valve to make startup easier.
In the open position, the valve lever is parallel
to the body of the valve. See Fig 6. Close the
filter drain valve.
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
b. Turn the pressure control knob counterclock-
wise until all spring tension is relieved. You will
be able to feel it. The sprayer is now set at the
lowest pressure setting. Turning the knob fur-
ther will cause it to fall off.
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
c. Attach fuel hose from tank.
d. If the engine is cold, close the choke by mov-
ing the choke lever. See Fig 6.
D are instructed to relieve the pressure,
D stop spraying,
3. Turn and hold the ignition key to START until you
hear the engine “catch”, then release the key to
RUN. See Fig 6. If the engine does not start,
open the choke a little (move lever). If the engine
floods, open the choke all the way and try again.
D check or service any of the system equipment,
D install or clean the spray tip.
e. After the engine is warm, gradually open the
choke lever (move choke lever) and close the
bypass valve. See Fig 6.
1. Engage the gun safety latch.
2. Open the bypass valve.
CHOKE
3. Turn the ignition key to OFF.
ON/OFF
SWITCH
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to the side of a grounded metal
pail, and trigger the gun to relieve pressure.
AIR FILTER
5. Engage the gun safety latch.
PRESSURE
CONTROL
KNOB
6. Open the pressure drain valve, having a container
ready to catch the drainage. Leave the valve open
until you are ready to spray again.
BYPASS
VALVE
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved after
following the steps above, wrap a rag around the tip
guard retaining nut or hose end coupling and VERY
SLOWLY loosen the part to relieve pressure gradually,
then loosen completely. Now clear the tip or hose.
7874b
Fig 6
NOTE: In cold weather, run the engine for about 15
minutes with the bypass valve open before
starting the displacement pump, to help avoid
hydraulic motor stalling.
f. Follow the Pressure Relief Procedure
Warning on page 10, to shut off the sprayer.
1. Prepare the Fluid
WARNING
To stop the engine in an emergency, turn OFF
the ignition key. Close the bypass valve if possible.
See Fig 6. Then follow the Pressure Relief Proce-
dure Warning on page 10.
a. Prepare the fluid according to the fluid manu-
facturer’s recommendations.
b. Place the pump or suction tube into the fluid
container.
10
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Operation
If the motor stalls during operation, turn OFF the igni-
tion key. With your hand, firmly press straight down on
the motor reset button. Now try to restart the sprayer. If
it will not start, refer to the separate motor manual,
307158.
CAUTION
The engine throttle has been set to a maximum of
3000 RPM. The sprayer warranty will be voided and
the hydraulic pump life shortened if this adjustment is
changed.
CAUTION
Never use a hammer to depress the reset button, as
it could cause serious internal motor damage.
6. Cleaning a Clogged Tip
WARNING
4. Prime the Pump
SKIN INJECTION HAZARD
To reduce the risk of a fluid injection
a. Be sure the gun safety latch is engaged.
b. Don’t install the spray tip yet!
injury, NEVER hold your hand, body or a
rag in front of the spray tip when
c. If the engine has not been started, follow the
procedure in Step 2., page 10.
cleaning or checking for a cleared tip. To reduce
the risk of a fire or explosion, always hold the gun
firmly against the side of a grounded metal waste
container when checking to see if the tip was
cleared or when using a self–clearing tip.
d. Disengage the gun safety latch.
e. Point the gun into a grounded metal pail and
hold a metal part of the gun firmly against the
pail. See the WARNING below.
f. Squeeze the trigger and slowly turn the pres-
sure control knob clockwise just enough to
start the pump. See Fig 6.
g. Operate the pump until all air is purged from
the pump and hoses and the fluid is flowing
freely from the gun.
h. Release the trigger and engage the safety
latch.
i. Turn the pressure control knob counterclock-
wise until all spring tension is relieved. You will
be able to feel it. The sprayer is now at the
lowest pressure setting. Turning the knob
further will remove it.
a. Follow the Pressure Relief Procedure
Warning on page 10.
b. Clean the front of the tip frequently during the
day to keep the fluid from building up and clog-
ging the tip. To clean, and to clear a tip if it
clogs, refer to your separate gun instruction
manual. If you are using the RAC IV tip guard
and SwitchTip, refer to manual 308644.
7. Shutting Off the Sprayer
j. Follow the Pressure Relief Procedure on
page 10. Then install the spray tip in the gun
as instructed in the separate gun or tip instruc-
tion manual. If you are using the RAC IV
a. Whenever you stop spraying, even for a short
break, follow the Pressure Relief Procedure
Warning on page 10.
supplied with this sprayer, see manual 308644.
b. Clean the tip and gun as recommended in your
separate gun or tip manual.
5. Adjusting the Pressure
a. Turn the pressure control knob clockwise to
increase and counterclockwise to decrease the
pressure. Tighten the knob locknut to set.
c. Flush the sprayer at the end of each work day
if using water–based fluid or if it could harden
in the sprayer over night. See FLUSHING,
page 8. Use a compatible solvent to flush,
then fill the pump and hoses with solvent such
as mineral spirits to help prevent pump corro-
sion. Relieve pressure!
b. Always use the lowest pressure that is neces-
sary to completely atomize the fluid.
CAUTION
Operating the sprayer at a higher pressure than
necessary wastes fluid, causes early tip wear, and
shortens the sprayer life.
d. For long term shutdown or storage, always fill
the sprayer with mineral spirits to prevent
pump corrosion. Relieve pressure!
8. Adjusting the Intake Valve Ball Travel.
a. The pump is set to handle medium volume,
low viscosity fluid. To adjust the pump for
higher flow or heavier viscosity fluid, disas-
semble the intake valve as instructed in
manual 311762 and move the ball stop pin to a
higher set of holes. This increases the ball
travel.
c. If more coverage is needed, use a larger tip
rather than increasing the pressure.
d. Check the spray pattern. The tip size and
angle determines the pattern width and flow
rate. See the separate manual received with
your gun.
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Maintenance
1. Always stop the pump at the bottom of its
9. To change the hydraulic oil:
stroke when you take a break and at the end of
the day. This helps keep fluid from drying on the
rod and damaging the packings.
a. Follow the Pressure Relief Procedure
Warning on page 10.
2. Keep the displacement pump packing nut/wet
cup 1/3 full of TSL at all times. The TSL helps
protect the packings and rod.
b. Place a waste container under the drain plug
of the hydraulic reservoir. See Fig 7. Unscrew
the plug and drain the reservoir. Reinstall the
plug before proceeding.
3. Check the tightness of the packing nut daily. It
should be tight enough to stop leakage but no
tighter.
c. Remove the nuts and reservoir cover.
d. Remove the return line filter and install a new
filter assembly.
CAUTION
Proper engine and hydraulic oil level is important to
prevent costly damage to the sprayer. Check it as
often as recommended in Steps 4 and 5., below.
e. Inspect the inlet filter and replace it if needed.
f. Install the reservoir cover and nuts. Then pour
in five gallons (19 liters) of Graco Hydraulic Oil
through the intake filter. See Fig 7. Install the
fill cap.
4. Check the hydraulic oil level weekly. The oil
must be up to the top mark on the dipstick. Use
only Graco Hydraulic Oil.
NUTS
HYDRAULIC
OIL FILL CAP
5. Check the engine oil level at least weekly. The
oil must be up to the FULL mark on the dipstick.
The engine should not use more than one ounce
of oil per hour of operation. Consult the engine
manual, supplied, for additional recommended
maintenance.
COVER
ENGINE
OIL
FILL PLUG
INLET
FILTER
6. Inspect the return line filter frequently for clog-
ging. Replace it after every 500 hours of operation
or every 6 months, whichever comes first. A
clogged or worn out filter reduces filter capability
and will damage the hydraulic pump.
7. Change the hydraulic oil after every 2000
hours of operation or every 12 months, whichever
comes first. For continuous operation in tempera-
tures above 85_F (30_C), change the oil after
every 1000 hours or 6 months of use. See Step 9.
for the procedure.
CAUTION
Cleanliness is essential when servicing the hydraulic
system. Use special care to avoid getting dust or dirt
into the hydraulic system to prevent damage to the
hydraulic components.
RETURN
LINE
FILTER
HYDRAULIC OIL
DRAIN
PLUG LOCATED
UNDER RESERVOIR
8. Change engine oil and filter every 100 hour of
use. Use 30W detergent oil.
Fig 7
12
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Troubleshooting
WARNING
SKIN INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 10.
Check everything in the troubleshooting chart before disassembling the sprayer.
PROBLEM
CAUSE
SOLUTION
Gas engine doesn’t work properly.
Gas engine will not start.
Consult engine manual, supplied.
Check battery.
Gas engine operates, but
displacement pump doesn’t
operate.
Hydraulic motor stalled.
Pressure setting too low.
Turn the ignition key to OFF. Firmly press
straight down on motor reset button. Restart
sprayer, see page 10. If it doesn’t start, see
manual 307158.
Increase pressure. See page 11.
Clean the filter.
Displacement pump outlet filter (if
used) is dirty or clogged.
Tip or tip filter (if used) is clogged.
Hydraulic fluid too low.
Remove tip and/or filter and clean.
Shut off sprayer and add fluid immediately*. See
page 5.
Hydraulic pump worn or damaged.
Hydraulic motor worn or damaged.
Return sprayer for repair.
Return sprayer for repair.
Displacement pump rod seized by
dried paint.
Service pump. See manual 311762.
Displacement pump operates, but Piston ball check not seating properly. Service piston ball check. See manual 311762.
output is low on upstroke.
Piston packings worn or damaged.
Piston packings worn or damaged.
Replace packings. See manual 311762.
Replace packings. See manual 311762.
Displacement pump operates but
output is low on downstroke and/
or on both strokes.
Intake valve ball check not seating
properly.
Service intake valve ball check. See manual
311762.
Paint leaks into wetcup
Loose wet–cup
Tighten just enough to stop leakage.
Replace packings. See manual 311762.
Throat packings worn or damaged.
Excessive leakage around
Piston rod seal worn or damaged.
Replace these parts. See manual 307158.
hydraulic motor piston rod wiper.
Fluid delivery is low.
Pressure setting too low.
Increase pressure. See page 11.
Clean filter
Displacement pump outlet filter (if
used) is dirty or clogged.
Hydraulic pump is worn or damaged.
Hydraulic motor is worn or damaged.
Large pressure drop in fluid hose.
Return sprayer for repair.
Return sprayer for repair.
Use larger diameter hose.
The sprayer overheats.
Spitting from gun.
Cooler or blower is worn or damaged. Replace. See page 15.
Air in fluid pump or hose.
Check for loose connections on siphon
assembly, tighten, then reprime pump.
Fluid supply is low or empty.
Refill supply container.
*Check hydraulic fluid level often. Do not allow it to become too low. Use only Graco approved hydraulic fluid. See pages 5 and 20.
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Replacing the Hydraulic Pump
8. Pull the pump straight off the pump support.
1. Follow the Pressure Relief Procedure Warning
on page 10. Let the hydraulic system cool before
beginning the service procedure.
9. Loosen the setscrews (108) on the pump half of
the coupler (109). See Fig 9.
10. Remove all fittings from the old pump and install
them on the new pump in the same order.
2. Unscrew the reservoir drain plug (51), having a
container ready to catch the draining fluid.
11. Check Dimension A as shown in Fig 9. When the
dimension is correct, tighten the setscrews (108),
slide the new pump assembly onto the pump
support (117) and recheck the dimension.
3. Disconnect the hose (7) from the bypass valve (9)
by loosening the hose clamp (8). See Fig 8.
4. Loosen the hose clamp (8) and pull the hose (85)
off the hose insert (5) near the elbow (3). See Fig
8.
CAUTION
The correct coupling dimension is critical to avoid
improper coupler engagement to the coupler spider
which will damage the coupler and make the sprayer
inoperable.
5. Loosen the hose clamp (54) on the hose (53) just
above the hydraulic pump (107). See Fig 8.
6. Loosen the tube fitting nut (18) of hose (22). See
Fig 8.
7. Remove the two capscrews (150), lockwashers
(66) and washers (64) holding the pump (107) to
the support (117). See Fig 8.
12. Reconnect the hoses. Reinstall the reservoir plug
(51), and refill the reservoir with clean, Graco
approved hydraulic oil.
113
85
112
117
8
53
5
54
3
52
152
4
7
8
7876c
9
108
109
114
22
115
49,66
107
150,66,64
18
Fig 8
14
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Replacing the Cooler and Blower
c. Pull the pump support and blower off far
enough for the blower to fall out of the bottom
of the housing.
1. Follow the Pressure Relief Procedure Warning
on page 10. Let the hydraulic system cool before
beginning the service procedure.
d. Install a new blower. Secure the pump support
(117) to the engine. See Fig 8.
2. Remove the hydraulic pump as instructed in the
previous section.
e. Check Dimension A as shown in Fig 9 and
tighten the coupler setscrews (108). Butt the
blower hub up to the coupler half, keeping the
blower in full contact with the coupler, and
tighten the blower setscrews (B).
3. Disconnect the cooler to reservoir return hose (7.)
by loosening the hose clamp (8). See Fig 8.
4. Remove the cooler capscrews (49) and lock-
washers (66). See Fig 8.
5. Remove the fan guard (23). See Fig 8.
6. Pull the cooler (115) straight out.
CAUTION
The correct coupling dimension is critical to avoid
improper coupler engagement to the coupler spider
which will damage the coupler and make the sprayer
inoperable.
7. Inspect the rubber pad (116) for wear and replace
if necessary. See Fig 9.
8. Inspect the blower wheel (114) for wear. See Fig 8.
If it needs to be replaced, follow Steps 8a–8e.
9. Install the cooler.
a. Unscrew the setscrews (108) from the engine
half of the coupler (109). Unscrew the blower
setscrews (B). See Fig 9.
10. Fold the flaps of the pad (116) toward the cooler
fins and install the fan guard (23), capscrews (49)
and lockwashers (66). See Fig 8.
b. Remove the capscrews (112) and lockwashers
(113) holding the pump support (117) to the
engine and pull the support off. See Fig 8.
11. Reinstall the hydraulic pump and reconnect all
hoses.
ENGINE
108
115
23
117
A
DIMENSION A
0.05 in. ± 0.010
(1.27 mm ± –0.254)
107
109
108
116
TOP VIEW
Fig 9
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Displacement Pump Service
Disconnect the Displacement Pump
Reconnecting the Displacement Pump
1. Flush the pump if possible. Stop the pump on the
down stroke.
1. Screw the connecting rod (91) into the displace-
ment rod (A) and replace the lower cotter pin (89).
Screw the jam nut (90) all the way down. See
GH733 Sprayer Parts Drawing.
2. Follow the Pressure Relief Procedure Warning
on page 10.
2. Mount the displacement pump (46) onto the tie
rods (47).
3. Remove the suction tube and fluid hose from the
displacement pump.
3. Screw the shouldered nut (35) onto the hydraulic
motor (29). Screw the tie rod locknuts (48) onto
the tie rods (47) and torque to 35–50 ft-lb (47–68
N.m).
4. Unscrew the three tie rod locknuts (48). See
GH733 Sprayer Parts Drawing.
5. Unscrew the shouldered nut (35). Pull the
displacement pump (46) off the tie rods (47).
4. Reattach the hoses to the displacement pump.
6. Screw the jam nut (90) up onto the connecting rod
(91).
5. If the grounding wire was disconnected before
service, be sure to reconnect it before operating
the sprayer.
7. Remove the lower cotter pin (89) and unscrew the
connecting rod (91) from the displacement rod (A).
6. Start the pump and operate it slowly to check the
tie rods for binding. Adjust the tie rod locknuts, if
necessary to eliminate binding.
8. Refer to separate manual 311762 for displacement
pump repair instructions.
16
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Complete Sprayer Parts Drawing
506 156849
507 155665
508 164672
509 H52503
.NIPPLE, 3/8 ntp(m)
3
Model 230975, GH 733 Sprayer
.ADAPTER, 3/8 npt(m) x 3/8 npsm swivel 1
Includes items 501 to 510
.ADAPTER, 1/4 npsm x 3/8 npt(m)
.HOSE, fluid, nylon, 1/4 in. ID,
1/4–18 npsm(fbe), 3 ft (0.9 m) long
.AIRLESS SPRAY GUN
see manual 309740 for parts
BUSHING, pipe, 3/4 x 3/8 in.
1
1
REF
NO. PART NO.
DESCRIPTION
QTY
501 231733
GH 733 SPRAYER
(See parts list on page 19)
HOSE & GUN KIT,
includes items 504 to 509
.HOSE, fluid, nylon, 3/8 in. ID,
3/8 npsm(fbe); 50 ft (15m) long
1
510 246240
511 100505
1
1
504 218659
505 H53850
1
3
*Install this adapter in place of the fluid outlet nipple in the fluid
filter.
505
509
510
507
506
511
REF
39
508
505
505
506
REF 38
See page 18 for
continuation
506
506
ti10624A
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GH733 Sprayer Parts Drawing
Model 231733, Series D
82
30
29
79
77
76
E
31
22
33
34
A
91
36
49
47
178
32
35
89
177
103
143
48
37
46
38
31
39
150
See page 17 for
continuation
144
43
9086B
18
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GH733 Sprayer Parts Drawing
187
182
183
88
124
LABEL
LABEL
83
1
184
72
68
LABEL
LABEL
71
87
172
181
170
LABEL
173
171
73
LABEL
72
LABEL
75
64
LABEL
28
27
31
66
31
26
60
67
58
188
63
41
To Starter
Switch
Ref 58
61
To Engine
14
122
13
119
185
121
186
56
21
12
118
55
74
28
123
64
28
57
20
19
7877c
74
120
40
145
59
11
119
307616
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GH733 Sprayer Parts Drawing
Ref 111
Ref 77
78
93
94
7879b
24
7879A
Ref 22
20
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GH733 Parts List
REF
76
77
78
79
82
83
85
87
88
89
91
93
94
95
96
97
98
106053
513574
107127
620188
105430
15C712
178795
177808
178935
244820
197341
107125
105429
178750
178794
500054
107067
ELBOW, 90_, 1–1/16 in. thread
HOSE, hyd rtn, 1 in. x 20.75 in.
ADAPTER, male, 1–5/16 in. x 3/4 in.
ADAPTER, 1 in. (m) x 3/4 x 1/2 x 3/8 (f)
NUT, seal, 1 in. npt
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
NO. PART NO.
DESCRIPTION
QTY
1
107074
106114
107053
107128
107050
178859
102473
210658
165472
106039
106123
100018
100321
158979
188344
103475
158491
107052
115753
107069
101354
513575
BREATHER, fill cap
STRAINER, inlet
1
1
1
1
3
1
6
1
1
2
4
4
4
1
1
1
1
1
1
1
2
2
3
ELBOW, pipe, 90_, 1/2 x 3/8 npt
INSERT, hose, 1/2 npt(f)
HOSE, rubber, 5 in. (125 mm)
CLAMP, hose
VALVE, ball 3/8 npt(m)
ELBOW, pipe, 90_, 3/8 npt(f)
WHEEL
CAPSCREW, hex hd, 1/2 x 4 in.
LOCKWASHER, spring, 1/2 in.
NUT, hex, 1/2 in. thread
NIPPLE, pipe, reducing, 3/8 x 1/2 npt
NIPPLE, pipe, reducing, 3/8 x 1/2 npt
TEE, pipe, 1/2 npt(f)
SHIELD, heat
HOSE, cooler, 0.625 in., 10.5 in. lg
LABEL, identification
LABEL, caution
CLIP, hairpin, with lanyard
ROD, adapter
4
TEE, service
5
7
8
9
10
11
12
13
14
15
15
16
17
18
19
20
21
22
ELBOW, 90_ street, 3/4 npt(m)
NUT, seal, 3/4 npt
FITTING, return, 1 in. npt(m) x 3/4 npt(f)
FILTER, fluid
BUSHING, hex hd
O–RING, buna–n
SCREW, mach, hex washer hd, 8 x 3/8 in.1
KNOB, pump
103 112798
105 219099
106 100187
107 178872
108 100421
109 106063
110 605358
111 113287
112 107143
113 100052
114 178792
115 178788
116 178861
117 178786
118 102169
119 100016
120 100011
122 100015
123 178787
130 106229
131 206994
132 185016
137 100004
138 107032
139 158683
140 108426
141 183574
142 183575
143 237686
144 244683
145 158233
150 100505
167 110838
168 191958
169 191959
170 112179
171 113819
172 100022
173 100016
174 290320
176 070401
177 100101
1
1
1
2
2
1
1
4
4
1
1
2
1
4
4
2
2
1
1
1
1
NIPPLE, short, 1/2 npt
FITTING, tube, flared
BATTERY, 12 volt, “L” style terminals
CLAMP, battery
NUT, hex, 5/16 in.
PUMP, vane, hydraulic
SETSCREW, 5/16 in. x 3/8 in.
COUPLER
PIN, straight, spring
KEY, 1/4 in.
HOSE, hydraulic supply, nylon, 3/4 in. ID,
cpld 1–1/16 in. fbe, 30 in. (762 mm)
GUARD, fan
ENGINE, 18 HP, OHC
CAPSCREW, sch, 7/16 x 1.25 in.
LOCKWASHER, spring, 7/16 in.
BLOWER
1
1
1
1
1
4
23
24
25
26
27
28
29
178751
179714
100213
217469
101578
100214
217022
SPACER
NIPPLE, pipe, 3/8 npt x 3 in.
FRAME, pump
COOLER
PAD
CAPSCREW, hex head, 8–32 x 0.38 in.
SUPPORT, pump
CAPSCREW, hex hd, 5/16 x 1.5
LOCKWASHER, spring, 1/4 in.
WING NUT, 1/2 in.
NUT, hex, 1/4–10 unc
SHELF, battery
NIPPLE
TSL, 8 oz. not shown
LABEL, Caution
LOCKWASHER, spring, 5/16 in.
MOTOR, hydraulic
see manual 307158 for parts
LABEL, identification
18
1
1
6
2
2
1
1
1
2
1
1
1
1
1
30
31
32
33
34
35
36
37
38
39
41
43
46
177755
110838
106212
177765
177652
244819
197340
158586
111337
157785
113952
245468
L250C1
NUT, lock, 5/16–16
CAPSCREW, 3/8–16 x 2.75 in.
PLUG
HANDLE
COUPLING, assy
CAPSCREW, hex hd, 3/8–16 in. x 1.25 in. 2
COUPLING, cover
ELBOW, 90_ street, 3/8 npt (mxf)
ELBOW, 90_, 3/8 npt(mxf)
O–RING, buna–n
HOSE, rubber tube, 4.5 in.
NIPPLE, barbed hose, 3/8–18 npt(f)
GROUND WIRE & CLAMP
VALVE, pressure drain
WASHER, flat
BUSHING, 3/4 x 3/8 in.
LOCKNUT, 5/16 in.
BRACKET, switch
GUARD, muffler
SCREW, thread forming, (M5 x .8 mm)
NUT, 1/4 in.
SCREW, cap, 1/4 in.
WASHER, lock
LABEL, identification
TUBING, electrical, 13 in.
SCREW, cap, hex hd, 1 x 3/8–16 in.
unc-2a
BRACKET, motor, hydraulic
SPACER
GUARD, hose
COUPLING, fuel line
BRACKET, gas line
CLAMP, hose
1
1
1
1
1
1
1
2
1
4
1
1
3
2
4
2
1
1
4
BUSHING, 1 x 3/4 in.
TEE, 3/4 in. npt(f)
SWIVEL, 3/4 in. m x f
CABLE, battery, positive, 23 in., 6 awg
TUBE, suction, inlet
PUMP, displacement
see manual 311762 for parts
ROD, tie, 14.59 in. (371 mm)
NUT, lock, type “E” 5/8 in.– 11
CAPSCREW, hex head, 3/8–16 x 1 in.
O–RING, fluoroelastomer
PLUG, box, 3/4 in.
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
63
64
67
68
71
72
73
74
75
198592
101712
100101
104444
104126
107049
178791
101818
178773
177641
177570
113951
107068
15C713
216141
246015
100023
100678
3
3
5
1
1
INSERT, hose, 3/4 npt(f)
HOSE, suction, 1 in. ID, 3 ft (9.9 m)
CLAMP, hose, 13/16 in. to 1–1/2 in. OD
LEG, frame
1
1
2
1
WASHER, flat
AXLE
2
1
CABLE, battery, negative, 18 in. , 6 awg
HOOK, bolt, 1/4 in. thread
PLATE, engine
1
1
178 625057
180 195516
181 191863
182 113372
183 192228
184 801971
185 801959
186 801958
187 118423
188 238681
1
4
1
1
1
2
1
1
1
1
1
SUPPORT, engine
MOUNT, motor
WASHER, 3/8 in.
1
1
14
4
CAPSCREW, hex hd, 5/16 x 1.75 in.
290386* LABEL, WARNING
218125 RESERVOIR KIT
185951* LABEL, DANGER
185285* LABEL, DANGER
100188
177807
1
PROTECTOR, terminal black
PROTECTOR, terminal red
COVER, debris
1
1
1
FUEL TANK ASSY, 6 gallon
NUT, heavy hex, 5/16–18 unc–2a
LABEL, identification
10
1
*DANGER and WARNING labels are available at no charge.
307616
21
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Notes
22
307616
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Technical Data
Accessories
Must be purchased separately.
GRACO–APPROVED HYDRAULIC OIL
Engine . . . . . . . . . . . . . . . KOHLER Model CH18 OHV 4 cycle
twin cylinder, air cooled, 18 HP, (13.4 kW)
Gasoline . . . . . . . . . . . . . . . . . . . 6.0 gallon (22.7 liter capacity)
consumes 1.3 gal/hr (4.9 liter/hr)
169236
207428
5 Gallons (20 liters)
1 Gallon (3.8 liters)
Hydraulic Fluid Sump . . . . . . . . . . . . . . . . . . 5 gallon (19 liters)
Hydraulic Pressure . . . . . . . . . . . . . . . . . . . . 1300 psi (89 bar)
10.2 gpm (39 l/min)
DANGER LABELS
Displacement Pump . . . . . . . . . . 3500 psi (240 bar, 24 MPa)
Maximum Working Pressure
The English language DANGER label shown on
page 4 is also on your sprayer. If you have painters
who do not read English, order one of the following
labels to apply to your sprayer. The drawing below
shows the best placement of these labels for good
visibility.
3 gpm (11.4 lpm) output,
15 cycles/gallon
Pump Fluid Outlet Size . . . . . . . . . . . . . . . . . . . . . . . 1 in. npt(f)
Wetted Parts:
Displacement Pump . . . . . . . . . . . . . . . . . . . Steel, Nitralloy,
Tungsten Carbide, PTFE, Leather
Filter . . . . . . . . . . Aluminum, Carbon Steel, Stainless Steel,
Weight (dry w/o packaging) . . . . . . . . . . . . . . . 480 lb (217 kg)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.5 in. (1.3 m)
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48.5 in. (1.2 m)
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 in. (736 mm)
Sound Levels*:
Order the labels directly from Graco, free of
charge. Toll Free: 1–800–328–0211
Sound Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 dB(A)
Sound Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 dB(A)
* Measured at maximum normal load conditions.
French
186956
Spanish 185961
German 186041
Greek
Korean
English
186045
186049
185593
Apply other
language here
7871b
307616
23
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Graco Warranty
Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special extended or limited
warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment
determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in
accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or
substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of
Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,
installation, operation or maintenance or structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for
verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect
in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and
transportation.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any
other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the
date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT
NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, gas engines,
switches, hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance
in making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract,
breach of warranty, the negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties
reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures
judiciaires exécutés, donnés ou intentés à la suite de ou en rapport, directement ou indirectement, avec les procédures concernées.
ADDITIONAL WARRANTY COVERAGE
Graco does provide extended warranty and wear warranty for products described in the “Graco Contractor Equipment Warranty
Program”.
Graco Phone Number
TO PLACE AN ORDER, contact your Graco distributor, or call this number to identify the distributor closest to you:
1–800–690–2894 Toll Free.
All written and visual data contained in this document reflect the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
This manual contains English. MM 307616
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
9/1983, Rev 7/2007
24
307616
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