Triplex Ceramic
Plunger Pump
OperatingInstructions/
Repair and Service
Manual
Model
GP7124A
Contents:
InstallationInstructions:
Pump Specifications:
page 2
page 3
Parts List/Exploded View: pages 4-5
Repair & Service:
TorqueSpecifications:
Dimensions:
pages 6-7
page 7
back page
back page
WarrantyInformation:
Updated 5/98
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Specifications
Model GP7124A
Volume ........................................................................................................ Up to 12.7 GPM
Discharge Pressure .................................................................................... Up to 10000 PSI1
Speed .......................................................................................................... Up to 750 RPM
Inlet Pressure.............................................................................................. Up to 90 PSI2
Plunger Diameter........................................................................................ 24mm
Plunger Stroke ............................................................................................ 48mm
Crankshaft Diameter .................................................................................. 48mm
KeyWidth ................................................................................................... 14mm
Crankshaft Mounting .................................................................................. Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids................................................................... Up to 140 oF
Inlet Ports ................................................................................................... (2) 1 1/4" NPT
Discharge Ports .......................................................................................... (2) 3/4" NPT
Weight......................................................................................................... 374 lbs.
Crankcase Oil Capacity .............................................................................. 1.6 Gal.
Fluid End Material....................................................................................... Stainless Steel
Volumetric Efficiency @ 700 RPM ............................................................ 89%
Mechanical Efficiency @ 700 RPM .......................................................... 83%
Consult the factory for special requirements that must be met if the pump is to
operate beyond one or more of the limits specified above.
NOTES: 1Intermittent Duty 10.1 GPM @ 10,000 PSI. System Requirements:
No Unloader or Regulator allowed. Must use a safety valve and dump gun.
2Positive inlet pressures are recommended!
GP7124A HORSEPOWER REQUIRMENTS
RPM GPM 3000 PSI 5000 PSI 6000 PSI 7250 PSI
300 5.1
400 6.8
550 9.3
600 10.1
650 11.0
700 11.8
750 12.7
10.9
14.5
19.9
21.7
23.6
25.4
27.2
18.1
24.2
33.2
36.2
39.3
42.3
45.3
21.7
29.0
39.9
43.5
47.1
50.7
54.3
26.3
35.0
48.2
52.5
56.9
61.3
65.7
RPM
600
GPM
10.1
10000 PSI*
71.4
*FOR INTERMITTENT DUTYONLY!
MUSTRUN PUMPWITHADUMPGUNAND SAFETYVALVE!
AN UNLOADERAND REGULATOR MUSTNOTBE USED!
HORSEPOWER RATINGS:
We recommend a 1.1 service factor be specified
when selecting an electric motor as the power
The rating shown are the power requirements for the source.
pump. Gas engine power outputs must be
approximately twice the pump power requirements
shown above.
To compute specific pump horsepower requirements,
use the following formula:
GPM X PSI
1400
= hp
3
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GP7124A PARTS LIST
ITEM PART
DESCRIPTION
Crankcase
QTY.
1
ITEM PART
DESCRIPTION
Flinger
QTY.
3
1
07600
13000
07601
07602
07603
01009
13133
13134
07109
07182
07607
07608
07184
07610
07611
07612
13405
07614
13182
13406
13407
13183
13184
07619
07225
13136
07622
13154
07623
07624
07625
07626
07627
07628
34
13137
13138
13408
13409
07150
07683
13400
07718
07685
13410
13238
13159
13160
13411
13162
13146
07693
12055
13131
13130
07062
13147
13148
13149
07699
07700
07701
07702
07703
07704
12253
12251
13362
13358
2
OilFillerPlugAssembly
CrankcaseCover
HexagonScrew
OilDipStick
O-Ring,DipStick
HexagonScrew
SpringWasher
DrainPlug
1
36
Plunger
3
4
1
38
StuffingBox
Seal Case
3
5
1
39
3
8
1
39A
39B
40
O-Ring
6
9
1
SupportRing
GroovedSeal
SupportRing
Packing
6
10
12
12
2
3
11
41
3
12
42
3
13
Gasket,DrainPlug
BearingCover
RadialShaftSeal
O-Ring
2
43
TeflonSupportRing
Circlip
3
14
2
44
3
15
2
49
StudBolt
8
16
2
49A
50
Nut
8
20
TaperRollerBearing
FittingDisc(Shim)
ShaftProtector
Crankshaft
2
ValveCasing
CylinderStud
InletValveAssy.
SupportRing
O-Ring
1
20A
21
1
50A
51
2
1
3
22
1
51A
51B
51C
51D
51E
51F
52
6
23
Key
1
6
24
ConnectingRodAssy.
FittingScrew
Washer
3
InletValveSeat
ValvePlate
ValveSpring
SpacerPipe
DischargeValveAssy.
DischargeValveSeat
Plug
3
24A
24B
25
6
6
6
6
CrossheadAssy.
CrossheadPin
CoverPlate
3
6
28
3
3
30
1
52C
58
3
30A
30B
30C
30D
31
HexagonScrew
Grommet
8
3
4
58A
58B
58C
59
O-Ring
3
Washer
8
SupportRing
HexagonScrew
Plug
3
Cover
1
12
3
EyeBolt
1
32
RadialShaftSeal
ShaftSeal
3
59A
60
Seal
3
32A
33
3
PlugG3/4
1
SealRetainer
O-Ring
3
61
PlugG1-1/4
DiscforCrankshaft
HexagonScrew
1
33A
33B
3
66
1
Circlip
3
67
1
4
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Exploded View - GP7124A
5
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GP7124A REPAIR INSTRUCTIONS
NOTE: Alwaystaketimetolubricateallmetalandnon-metalpartswithalightfilmofoil
beforereassembling. Thisstepwillhelpensureproperfit,atthesametimeprotecting
thepumpnon-metalparts(elastomers)fromcuttingandscoring.
TO CHECKVALVES
Lossen screws (58C), take plugs (58) out of valve casing with two screws.Take out complete valve (51)
using either tool (part #07662) or stud bolt.Valve seats (51C and 52C) are pressed out of spacer pipe
(51F) by hitting the valve plate (51D) with a bolt. Check surfaces of valve plate, valve seat, O-rings (51B,
58A) and replace worn parts.
CAUTION: When reassembling: The suction valve seat (51C) is 1mm smaller in diameter than the
discharge valve seat (52C). Suction valve seats are marked "S" and always have to be
installed first. Discharge valve seats are marked "P" and are always tobe installed on top of
suction valve. Plugs (58) are to be tensioned down evenly with screws (58C) and crosswise
at 210NM.
TO CHECK SEALSAND PLUNGER PIPE
Loosen nuts (49A) and remove pump head. Separate plunger (36) from crosshead (25) by means of two
open-end wrenches (size 22 and 27). Pull seal sleeves (38) out of their fittings in the crankcase.Take seal
case (39) out of seal sleeve (38).Take seal-pack (40-43) out of seal sleeve.After removing the circlip ring
(44) take seal-pack (43A-C) out of seal sleeve (38).
Examine plunger (36) and seals (40,42,43B).
When replacing plunger (36), tighten new plunger to 26 ft.lbs.
Replace worn parts; grease seals with Silicone before installing.
CAUTION: Don't loosen the 3 plunger (36) before the valve casing has been removed otherwise the
plunger (36) could hit against the spacer pipe (51F) when the pump is being turned.
Seal life can be increased if the pretensioning allows for a little leakage. This assists lubrica-
tion and keeps the seals cool. It is therefore not necessary to replace seals before the leak-
age becomes too heavy and causes output and operating pressure to drop.
6
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GP7124A REPAIR INSTRUCTIONS
MOUNTINGVALVE CASING
Check O-rings (39A) and support rings (39B) on seal case (39). Clean surfaces of seal sleeves in gear box
and sealing surfaces of valve casing.
Push valve casing carefully onto O-rings of seal case and centering studs (50A).Tighten nuts (49A) to103
ft-lbs.
TO DISASSEMBLE GEAR
Take out plunger and seal sleeves as described above. Drain oil.After removing the circlip ring (33B), lever
out seal retainer (33) with a screw driver. Check seals (32,32A,33A) and surfaces of crosshead. Remove
crankcase cover (4). Loosen inner hexagon screws on the connecting rods (24) and push con rod halves as
far into the crosshead guide as possible.
CAUTION: Connecting rods are marked for identification. Do not twist con rod halves. Con Rod is to be
reinstalled in the same position on shaft journals.
Check surfaces of connecting rod and crankshaft (22)
Take out bearing cover to one side and push out crankshaft taking particular care that the con rod doesn't
get bent.
CAUTION: Seal (32A) must always be installed so that the seal-lip on the inside diameter faces the oil.
Reassemble in reverse order: Regulate axial bearing clearance - minimum 0.1mm, maximum
0.15mm-by means of fitting disc (20A). Shaft should turn easily with little clearance.Tighten
inner hexagon screws to 30 ft.-lbs.
CAUTION: Connecting rod has tobe able to be slightly moved sidewise at the stroke journals.
GP7124A TORQUE SPECIFICATIONS
Position
Item#
13133
13138
13160
Description
Hexagon Screw
Plunger
Torque Amount
10
36
30 (ft.-lbs)
26 (ft.-lbs.)
49A
Nut
103 (ft.-lbs)
7
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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 required prior 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
WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED BY THE MANUFACTURER.
GIANT INDUSTRIES, INC. 900 N. Westwood Ave., P.O. Box 3187, Toledo, Ohio 43607
5/98 GP7124A.PM6
Ó Copyright 1998 Giant Industries, Inc.
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