Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service
Manual
Model
MP4130HT(C)
Contents:
InstallationInstructions: page 2
PumpSpecifications:
Exploded View:
pages 3
page 4
Parts List / Kits:
page 5
RepairInstructions:
page 6-10
TorqueSpecifications: page 10
TroubleShooting:
Dimensions:
WarrantyInformation:
page 11
back page
back page
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Specifications
Model MP4130HT(C)
Volume ....................................................................................................... Up to 629 GPH (10.5 GPM)
Discharge Pressure..................................................................................... Up to 1200 PSI
Inlet Pressure............................................................................................See NPSHR chart (pg.2)
Speed ......................................................................................................... Up to 750 RPM
Plunger Diameter ........................................................................................ 30mm
Plunger Stroke ............................................................................................ 26mm
Crankcase Oil Capacity .............................................................................. 32 fl.oz.
Temperature of Pumped Fluids.................................................................... Up to 220 oF
Inlet Ports ................................................................................................... (2) 1" BSP
Discharge Ports .......................................................................................... (2) 3/4" BSP
Pulley Mounting .......................................................................................... Either side
Shaft Rotation ....................................................................................Top of Pulley Towards Fluid End
Weight ........................................................................................................ 72 lbs.
Crankshaft Diameter .................................................................................. 28mm
HORSEPOWER INFORMATION
We recommend that a 1.1 service factor be specified
when s electing an electric motor as the power source.
To compute specific pump horsepower requirements,
use the following formula:
PULLEY INFORMATION
Pulley selection and pump speed are based on a
1725 PRM motor and "B" section belts. When
selecting desired GPM, allow for a ±5% tolerance
on pumps output due to variations in pulleys, belts
and motors among manufacturers.
HP = (GPM X PSI) / 1440
1. Select GPM required, then select appropriate
motor pulley from the same line.
2. The desired pressure is acheived by selecting the
correct nozzle size that corresponds with the pump
GPM.
MP4130HT(C) PULLEY SELECTION AND HORSEPOWER
REQUIREMENTS
PUMP
MOTOR
RPM GPM GPH 300 PSI 600 PSI 725 PSI 900 PSI 1200 PSI
PULLEY PULLEY
9.75"
9.75"
9.75"
9.75"
9.75"
2.50"
3.00"
3.60"
4.15"
4.45"
400 5.6 335
500 7.0 419
600 8.4 503
700 9.8 587
750 10.5 629
1.2
1.5
1.8
2.0
2.2
2.3
2.9
3.5
4.1
4.4
2.8
3.5
4.2
4.9
5.3
3.5
4.4
5.3
6.1
6.6
4.7
5.8
7.0
8.2
8.8
3
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Exploded View - MP4130HT(C)
4
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MP4130HT(C) PARTS LIST
ITEM PART# DESCRIPTION
QTY.
3
ITEM PART# DESCRIPTION
QTY.
1
1
06100 Crankcase
36
07267 Snap Ring
39
07271 Pressure Ring
06137 V-Sleeve
6
2
13000 Oil Filler Plug Assembly
07243 Cover, Crankcase
07244 O-Ring
1
40
9
4
1
5
1
41
07273 SupportRing
07353 Tension Spring
06103 Tension Plug, M42 x 1.5
07354 O-Ring
6
42
3
8
01008 Oil Dip Stick Assembly
01009 O-Ring, Dip Stick
01010 Screw, Crankcase Cover
01011 Spring Washer
07109 Oil Drain Plug, G 1/2"
07182 Gasket
1
42A
42B
43
3
9
1
10
11
12
13
14
15
16
17
20
20A
21
22
23
24
4
3
06138 Valve Casing
07280 Valve Seat
1
4
44
6
1
1
44A
45
07281 O-Ring
6
07282 Valve Plate
6
07245 Bearing Cover
07247 Seal, Crankshaft
07627 O-Ring
2
46
07283 Valve Spring
07284 Spring Retainer, Discharge
07356 Plug, Brass, M36 x 1.5
07332 O-Ring
6
2
2
47
3
48
3
07114 Hex Screw, Bearing Cover
07248 Roller Bearing, Tapered
07249 FittingDisc
9
48A
49
6
2
2
06139 Stud Bolt
6
49A
49B
49C
50
06140 Fitting Sleeve with Extension
06141 Extension
2
07250 Shaft Protector
07251 Crankshaft
1
4
1
07252 Key
1
07289 Centering Sleeve
13042 Hexagon Nut
13043 Disc
2
6
07253 Connecting Rod
3
50A
51
6
24A&B 07122 Hex Screw w/washer
6
25
07254 Crosshead, Complete
07255 Crosshead Pin
07256 Centering Sleeve
07261 Plunger Pipe
3
06110 Spacer Pipe
3
52
06112 Inlet Valve Housing
06115 Inlet Spring Tension Disc
12249 Plug, G 1"
3
28
3
54
3
29A
29B
29C
29D
29E
30
3
3
55
1
56
12248 Plug, G 3/4"
1
06134 Tension Screw
13008 Copper Ring
3
57
13020 Disc for Crankshaft
06588 Screw-In Pipe Connection
06142 Tin Lid
1
3
06135 Plunger Extension
06136 Oil Scraper
3
59
2
62
1
3
31
07260 Crankcase Oil Seal
3
MP4130HT(C) REPAIR KITS
Seal Repair Kit
Valve Assembly Kit
Part # 09532
Part # 09533
Item # Qty.
Part # Description
Item # Qty.
Part # Description
40
42B
9
3
06137 V-Sleeve
07354 O-Ring
44
44A
45
46
47
6
6
6
6
3
3
3
07280 Valve Seat
07281 O-Ring
07282 Valve Plate
07283 Valve Spring
07284 Spring Retainer, Discharge
07332 O-Ring
48A
54
06115 Inlet Spring Tension Disc
5
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REPAIR INSTRUCTION - MP4130HT(C)
Disassembly sequence of the GIANT MP4130HT(C) Series Pumps
1. With a 27mm wrench,
remove the three discharge
plugs (#48) and three inlet
plugs (#42A) from the
manifold (#43).
3. Using a valve puller (avail-
able from Snap-On-Tools),
remove the valve assembly
(#44 - #47).
2. Inspect the plug o-rings
(#48A and #42B) and
replace as necessary.
47
46
45
44A
44
4. Inspect all parts, especially the seating surface of
the valve plate (#45), and replace as necessary.
5. Remove the six manifold
stud nuts (#50) with a
19mm wrench. Remove
the spring washers
(#50A).Tap the back of the
manifold with a rubber
mallet to dislodge and slide
it off the studs (#49).
6. To remove the inlet valve
assembly, insert a 13mm
socket with extension
51
44
44A
45
46
52
through the rear of the
inlet manifold (#43) port
and tap it firmly with a
hammer. This will force
the tension spring (#46),
valve housing (#52) and the
remainder of the inlet valve
assembly out through the
front of the inlet port.
7. Pull the inlet valve assembly apart for inspection. Any resistance
may be overcome by placing the valve housing (#52) in a brass
jawed vise and carefully tapping the back of the valve plate (#45)
with a screwdriver. Remove the spacer pipe (#51) valve seats
(#44), o-ring (#44A), valve plate (#45), spring (#46), replace them
as necessary.
6
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36
39
40
41
8. From the back of the
manifold (#43), remove the
packing assembly (#'s 42,
41, 40, and 39) by tapping
assembly out from the
back to the front.
9. Turn the manifold (#43) over and remove the rear v-sleeve snap
ring (#36). Remove rear pressure ring (#39) , rear v-sleeve
(#40) and rear support ring (#41). These parts should slide
out with little resistance. If necessary, a screwdriver may be used
to pry outward. Replace all rubber parts and inspect the metal
parts for wear.
10. Note: The following
procedure is only neces-
sary if a stud bolt (#49)
has been damaged and
must be replaced. To
remove the manifold studs
(#49), place a stud nut
(#50), lock washer (#50A),
and second nut on each
stud. Tighten the nuts
against each other. Hold
the front nut with one
11. To remove the ceramic plungers, turn the plunger bolt (#29C)
counterclockwise with a 13mm socket. Use a steady torque to
prevent ceramic plunger sleeve damage. Loosen and remove
the plunger bolt assembly (#29C and #29D) and replace the
seal washer (#29D).
wrench, and remove the
stud bolt by turning the rear
nut counterclockwise with
another wrench. To
reassemble, turn the front
stud bolt nut clockwise.
Contact Giant Industries for service school
information. Phone: (419) 531-4600
31
11a. Inspect the crankcase oil
seals (#31) for evidence of
leaking. If there is oil on
the crankcase (#1) at the
sight of the oil seals, they
must be replaced. The oil
seals are replaced after
removing the crosshead/
plunger assembly (#25) as
described below.
7
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Gear End Disassembly
Note: Make certain that the plungers (29B) have been removed before starting the following sequence.
12. Make sure the oil is drained from the pump before removing the crankcase cover (#4). Remove all screws (#10). Inspect the
crankcase cover o-ring (#5) for damage and replace it as necessary.
13. Remove the connecting rod screws and washers (#'s 24A and 24B) with a 6mm allen wrench. Remove the back halves of each
connecting rod (#24) . Push the connecting rods down as far as possible into the crankcase (#1) housing. Note that the
connecting rod halves are numbered (or colored) and that the numbers (or colors) must be matched for reassembly.
14. Remove the crankshaft bearing cover screws (#17) with a 13mm wrench. Remove the key (#23) from the crankshaft (#22).
15. Remove the bearing cover (#14) and any shims (#20A) if any. Remember to replace shims on the same side of the crankcase
(#1) during the reassembly.
16. Steady the pump gear end and, using a rubber mallet, tap the crankshaft (#22) from one side. The far side bearing race will be
removed and the near side race will remain in the crankcase. The roller bearings (#20) will remain on the crankshaft. When
both ends are free, the crankshaft can be removed by hand.
17. To remove the remaining bearing race, place a dowel against the inside edge of the race and tap it out with a rubber mallet.
This is done only if the race wear surface has been damage.
18. Inspect the bearing race removed with the crankshaft (#22) and replace if wear surface is damaged.
19. Note: The following procedure is only necessary if the inspection shows evidence of heavy wear. Inspect the crankshaft
(#22) and bearings (#20) for wear. To remove the roller bearings from the crankshaft, use a three inch push puller with a pulley
attachment. To remount the bearings, tap the bearings down the well-lubricated crankshaft with the Giant Bearing Tool. Be
sure that the bearing is firmly seated.
20. Remove the connecting rod (#24) with the attached crosshead/plunger assembly (#25) from the crankcase (#1) by pulling it
straight out. The oil seals (#31) may now be removed by tapping them out through the front of the crankcase. Be careful not
to damage the snap ring.
21. Inspect the surfaces of the crosshead/plunger assembly (#25) and connecting rods (#24) for heavy scoring or galling due to
poor lubrication. Check for play at the joint between connecting rod crosshead/plunger assembly.
22. To remove the crosshead pin (#28) from the crosshead/plunger assembly (#25), the assembly should be positioned in such
a manner to prevent damage to the crosshead when driving the pin out. The crosshead pin can be driven out by tapping on
the tapered side of the pin
Reassembly sequence
Note: Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassembly. This step will help
ensure a proper fit, at the same time it will protect the pump nonmetal parts (elastomers) from cutting and scoring.
23. Take the crosshead/plunger rod assembly and insert the connecting rod (#24) into the crosshead/plunger assembly (#25).
Drive the tapered end of the crosshead pin (#28) into the beveled side of the crosshead and through the connecting rod
completing the assembly.
Note: The crosshead pin should not extend beyond either side of the crosshead in order to prevent damage to the crosshead
bore of the crankcase.
24. Inspect the crankcase crosshead guides for any possible damage.
25. Replace the connecting rod (#24), crosshead/plunger rod assembly (#25) into the crankcase (#1).
26. If removed previously, replace the far side bearing race into the crankcase. Tap with a rubber mallet until the edges are flush
with the crankcase surface.
27. Remove the old crankshaft seal (#15) from the bearing cover (#14). Lubricate the edges of the new seal and install using the
standard Giant Bearing Tool. Remove the bearing tool and tap around the perimeter of the seal with a rubber mallet to firmly
seat the seal. Position the far bearing cover on the crankcase (#1) and insert the cover bolts (#17). Tighten the cover evenly
to the crankcase, setting the bearing into position. Torque the cover bolts to 125 inch-pounds.
28. Insert the crankshaft (#22) with the mounted bearings (#20) through the near side of the crankcase (#1). Make certain that
the numbers (or colors) or the crankshaft correspond to the numbers (or colors) on the connecting rods (#24). Reinstall the
near side bearing race by inserting it into the crankcase. Supporting the crankshaft with one hand, tap the race with a rubber
mallet until the edge is flush with the crankcase.
NOTE: Contact Giant Industries for Service School Information. Phone: (419)-531-4600
8
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29. Replace any shims (#20A) and position the bearing cover (#14) as before. Tighten the bearing cover bolts (#17)
evenly to position the bearing race. Torque the bolts to 125 inch-pounds. Once the crankshaft reassembly is
complete, oil the crankshaft
races freely before replacing the connecting rod (#24) end caps.
30. Reassemble the connecting rods (#24), matching the numbered (or colored) halves. Torque the connecting rod
bolts (#24A) to 250 inch-pounds.
31. To replace the oil seal (#31) apply locktite to the outside edges of the seal and install from the front of the
crankcase (#1). The side of the seal with the spring must face the oil. Make sure that the face of the seal is flush
with the crankcase.
29B
29D
29C
32. Inspect the ceramic plungers (#29B) and replace them if
necessary. Clean the ends of the ceramic and remount onto the
crosshead/plunger assembly. Make certain that the end of the
plunger which is not counter-bored is facing the discharge
side of the pump. Install the seal washer (#29D) on the bolt
assembly.
33. Clean the bolt threads (#29C), apply
locktite, and remount.
39
40
40
41
33a. Torque the ceramic plunger
bolt assembly to 300 inch-
pounds. If originally
35. Reinstall the pressure ring (#39), v-
sleeves (#40) and support ring (#41)
into each plunger bore. Reinstall the
tension spring (#42).
34. Install the rear support ring
(#41), rear v-sleeve (#40),
rear pressure ring (#39). In-
stall the snap ring (#36).
removed, reinstall the stud
bolts (#49).
36. Reassemble the discharge
valve assembly by placing
the valve plate (#45), spring
(#46), and spring retainer
(#47) on top of the valve seat
(#44). Press fit together.
9
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37. Place the entire discharge as-
sembly into discharge port
making certain the assembly
is properly seated. Install dis-
charge plug (#48) and hand
tighten.
39. Again lubricate the plungers
(29B) and slide the manifold
(#43) gently and evenly over
the plungers. Press the mani-
fold firmly into place against
the crankcase (#1). Install
the spring washer (#50A)
and tighten the manifold stud
nuts (#50) to 58 ft.lbs.
38. Reassemble the inlet valve
assembly in the reverse or-
der of step #7. Make cer-
tain all the components are
press fit together and that the
spring retainer (#54) is
slightly counter sunk in the
valve housing (#52). Grease
the o-ring (#53) and install it
on to the valve housing. Re-
install the entire inlet valve
assembly into the manifold
(#43). install the tension
plugs (#42A) and tighten.
MP4130HT(C) TORQUE SPECIFICATIONS
Position
Item#
Description
Torque Amount
10
17
24A
29C
50
01010
07114
07122
07257
07158
Screw, Crankcase Cover
Hex Screw, Bearing Cover
Hex Screw, Connecting Rod
Bolt, Plunger
125 ft-lbs.
125 in-lbs.
250 in-lbs.
300 in-lbs.
58 ft-lbs.
Nut, Manifold Stud
10
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PUMPSYSTEMMALFUNCTION
CAUSE
MALFUNCTION
REMEDY
Wornpackingseals
Brokenvalvespring
Beltslippage
WornorDamagednozzle
Fouleddischargevalve
Fouledinletstrainer
ThePressureand/or
theDeliveryDrops
Replacepackingseals
Replacespring
TightenorReplacebelt
Replacenozzle
Cleanvalveassembly
Cleanstrainer
WornorDamagedhose
WornorPluggedreliefvalveonpump
Cavitation
Repair/Replacehose
Clean,Reset,andReplacewornparts
Checksuctionlinesoninletof
pumpforrestrictions
Checkforproperoperation
Unloader
Highhumidity
Wornseals
Waterincrankcase
NoisyOperation
Reduceoilchangeinterval
Replaceseals
Wornbearings
Cavitation
Replacebearings,Refillcrankcase
oilwithrecommendedlubricant
Checkinletlinesforrestrictions
and/orpropersizing
Wornpacking
Inletrestriction
Rough/Pulsating
Operationwith
PressureDrop
Replacepacking
Checksystemforstoppage, air
leaks,correctlysizedinletplumbing
topump
Accumulatorpressure
Unloader
Cavitation
Recharge/Replaceaccumulator
Checkforproperoperation
Checkinletlinesforrestrictions
and/orpropersize
Restricteddischargeplumbing
PressureDropat Gun
ExcessiveLeakage
Re-sizedischargeplumbingto
flowrateofpump
Wornplungers
Replaceplungers
Wornpacking/seals
Excessivevacuum
Crackedplungers
Inletpressuretoohigh
Adjust orReplacepackingseals
Reducesuctionvacuum
Replaceplungers
Reduceinletpressure
Wrong Grade of oil
Improper amount of oil in crankcase
HighCrankcase
Temperature
Giant oil is recommended
Adjust oil level to proper amount
11
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MP4130HT(C) DIMENSIONS (mm)
GIANTINDUSTRIESLIMITEDWARRANTY
Giant Industries, Inc. pumps and accessories are warranted by the manufacturer to be free from
defects in workmanship and material as follows:
1. For portable pressure washers and car wash applications, the discharge manifolds
willneverfail,period.Iftheyeverfail,wewillreplacethemfreeofcharge.Ourotherpump
parts, used in portable pressure washers and in car wash applications, are warranted
for five years from the date of shipment for all pumps used in NON-SALINE, clean
water applications.
2. One (1) year from the date of shipment for all other Giant industrial and consumer
pumps.
3. Six (6) months from the date of shipment for all rebuilt pumps.
4. Ninety (90) days from the date of shipment for all Giant accessories.
This warranty is limited to repair or replacement of pumps and accessories of which the
manufacturer’s evaluation shows were defective at the time of shipment by the manufacturer. The
following items are NOT covered or will void the warranty:
1. Defects caused by negligence or fault of the buyer or third party.
2. Normal wear and tear to standard wear parts.
3. Use of repair parts other than those manufactured or authorized by Giant.
4. Improper use of the product as a component part.
5. Changes or modifications made by the customer or third party.
6. The operation of pumps and or accessories exceeding the specifications set forth
in the Operations Manuals provided by Giant Industries, Inc.
Liability under this warranty is on all non-wear parts and limited to the replacement or repair of those
products returned freight prepaid to Giant Industries which are deemed to be defective due to
workmanship or failure of material. A Returned Goods Authorization (R.G.A.) number and
completed warranty evaluation form is requiredprior to the return to Giant Industries of all products
under warranty consideration. Call (419)-531-4600 or fax (419)-531-6836 to obtain an R.G.A.
number.
Repair or replacement of defective products as provided is the sole and exclusive remedy provided
hereunder and the MANUFACTURER SHALL NOT BE LIABLE FOR FURTHER LOSS, DAMAGES,
OR EXPENSES, INCLUDING INCIDENTAL AND CONSEQUENTIAL DAMAGES DIRECTLY OR
INDIRECTLY ARISING FROM THE SALE OR USE OF THIS PRODUCT.
THE LIMITED WARRANTY SET FORTH HEREIN IS IN LIEU OF ALL OTHER WARRANTIES OR
REPRESENTATION,EXPRESSORIMPLIED,INCLUDINGWITHOUTLIMITATIONANYWARRAN-
TIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND ALL SUCH
WARRANTIESAREHEREBYDISCLAIMEDANDEXCLUDEDBYTHEMANUFACTURER.
GIANT INDUSTRIES, INC., 900 N. Westwood Ave., P.O. Box 3187, Toledo, Ohio 43607
Ó Copyright 2001 Giant Industries, Inc.
4/01MP4130HTC.PM6
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