Triplex Ceramic
Plunger Pump Manual
Models
GP7150A, GP7155A, GP7255A
Contents:
Installation Instructions
GP7155A/GP7255A:
Pump Specifications:
page 2
page 3
Parts List/Exploded View: pages 4-5
Pump Specifications
GP7150A:
page 6
Recommended Spare
Parts List:
page 7
Repair Instructions:
Dimensions:
Warranty Information
page 7
back page
back page
Updated 03/06
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Specifications
Model GP7155A, GP7255A
................................................................U.S. ........................ Metric
Volume.................................................... 65.8 GPM .............. 250 LPM
Discharge Pressure ................................. 1500 PSI ................. 100 Bar
Speed ...................................................... 2000 PSI ................. 138 Bar
Inlet Pressure ........................................................................... Up to 700 RPM
Plunger Diameter ....................................2.17” ....................... 55mm
Plunger Stroke ........................................2.05” ....................... 52mm
Crankshaft Diameter............................... 1.89” ....................... 48mm
Key Width............................................... 0.55” ....................... 14mm
Crankshaft Mounting............................................................... Either side
Shaft Rotation .......................................................................... Top of pulley towards manifold
Max.Temperature of Pumped Fluids ...... 140 oF ..................... 60 oC
Inlet Ports ................................................................................ (2) 2-1/2" NPT
Discharge Ports........................................................................ (2) 1-1/4" NPT
Weight.....................................................374 lbs. ................... 170 kg
Crankcase Oil Capacity ..........................1.6 Gal. ................... 6.0 liters
Fluid End Material GP7155A.................................................. Bronze
Fluid End Material GP7255A.................................................. Nickle Plated Spheroidical Cast Iron
Mechanical Effecency @ 700 RPM ........................................ 0.83
Volumetric Effecency @ 700 RPM ......................................... 0.96
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.
PULLEY INFORMATION
HORSEPOWER INFORMATION
Pulley selection and pump speed are based on a 1725 Horsepower ratings shown are the power require-
RPM motor and "B" section belts. When selecting ments for the pump. Gas engine power outputs must
desired GPM, allow for a ±5% tolerance on pumps be approximately twice the pump power require-
output due to variations in pulleys, belts and motors ments shown above.
among manufacturers.
1. Select GPM required, then select appropriate when selecting an electric motor as the power source.
motor and pump pulley from the same line. To compute specific pump horsepower requirements,
2. The desired pressure is achieved by selecting the use the following formula:
We recommend that a 1.1 service factor be specified
(GPH X PSI) / 1450 = HP
correct nozzle size that corresponds with the pump
GPM.
GP7155A, GP7255A PULLEY SELECTION & HORSEPOWER
REQUIREMENTS
PUMP
PULLEY PULLEY
MOTOR
RPM GPM 800 PSI 1000 PSI 1300 PSI 1500 PSI 2000 PSI
12.75
12.75
12.75
12.75
12.75
9.00
9.75
10.75
11.70
12.75
479 45.0
531 49.9
585 55.0
638 60.0
700 65.8
25.7
28.5
31.4
34.3
37.6
32.1
35.6
39.3
42.9
47.0
41.8
46.3
51.1
55.7
61.1
48.2
53.5
58.9
64.3
70.5
64.3
71.3
78.6
85.7
94.0
3
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Exploded View - GP7150A/GP7155A/GP7255A
4
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Spare Parts List - GP7150A/GP7155A/GP7255A
ITEM
1
2
4
5
8
9
10
11
12
13
14
15
16
20
20A
21
22
PART
07600
13000
07601
07602
07603
01009
13133
13134
07109
07182
07607
07608
07184
07610
07611
07612
13405
07614
13182
13183
13184
07619
07225-0100
13136
08280
13154
07623
07624
07625
07626
07627
07628
07249
13137
07706
DESCRIPTION
Crankcase
QTY.
1
ITEM
38
PART
07794
13156
07721
06258
07635
13157
07795
07723
07796
07797
13158
07636
07711
07638
07712
07639
07637
13159
13160
07790
07791
06628
13162
08288
08281
08282
DESCRIPTION
QTY.
3
3
3
3
3
3
3
3
3
3
3
3
6
6
3
3
3
8
8
1
1
1
2
6
6
6
6
6
6
6
6
6
3
6
6
3
3
6
3
1
1
1
1
1
Seal Case (GP7150A)
O-Ring
O-Ring (GP7155A/GP7255A)
O-Ring (GP7150A)
Oil Filler Plug Assembly
Crankcase Cover
Gasket, Crankcase Cover
Oil Dip Stick
O-Ring, Dip Stick
Hexagon Screw
Spring Washer
Drain Plug
Gasket, Drain Plug
Bearing Cover
Radial Shaft Seal
O-Ring
Taper Roller Bearing
Fitting Disc (Shim)
Shaft Protector
Crankshaft
1
1
1
1
38A
38B
38B
38C
39
Support Ring (GP7150A Only)
Seal Sleeve (GP7155A/GP7255A)
Seal Sleeve (GP7150A)
Compact Ring (GP7155A/GP7255A)
Compact Ring (GP7150A)
Support Disc (GP7155A/GP7255A)
O-Ring (GP7155A/GP7255A)
Tension Spring (GP7150A)
V-Sleeve (GP7155A/GP7255A)
V-Sleeve (GP7150A)
1
12
12
3
2
2
2
2
2
1-5
1
1
1
3
3
3
1
8
4
8
1
1
3
3
3
3
3
39
39A
39A
40*
41
41
42
42
43
43
44
49
49A
50
50
50
Pressure Ring (GP7155A/GP7255A)
Pressure Ring (GP7150A)
Support Ring (GP7150A only)
Stud Bolt
23
24
25
28
Key
Connecting Rod Assy.
Crosshead Assy.
Crosshead Pin
Cover Plate
Hexagon Screw
Grommet
Washer
Cover Plate
Eye Bolt
Radial Shaft Seal
Shaft Seal
Hex Nut
Valve Casing (GP7155A)
Valve Casing (GP7255A)
Valve Casing (GP7150A)
Cylinder Stud
Valve Assembly
Spring Tension Cap
30
30A
30B
30C
30D
31
32
32A
33
33A
33B
33C
34
50A
51
51A
51B
51C
51D
51E
51F
51G
51H
56
Valve Spring Guide
07732-0100 Valve Spring
13164
08283
07653
13166
07266
13167
07658
07635
13166
07653
13173
13170
07661
12251
12252
13362
13358
Valve Plate
Valve Seat
O-Ring
Support Ring
O-Ring
Seal Retainer
O-Ring
Circlip
Fitting Disc
3
Valve Adaptor
O-Ring
Oil Scraper
3
56A
56B
56C
56D
57
58
59A
60
36
Plunger Pipe Assy.
(GP7155A/GP7255A) (36 A-D)
Plunger Pipe Assy. (36A-D)
Plunger Connection
Plunger Pipe (50mm)
Plunger Pipe (55mm)
(GP7155A/GP7255A)
Tension Screw
Copper Ring
Support Ring
Support Ring
O-Ring
Tension Spring
Plug
Copper Ring
Plug, 1-1/4” NPT
Plug, 2-1/2” NPT
Disc For Crankshaft
Hexagon Screw
3
3
3
3
36
07630
07667
07793
07666
36A
36B
36B
3
3
3
3
36C
36D
38
07664
07665
13155
61
66
67
Seal Case (GP7155A/GP7255A)
* This item may be removed to add a third v-sleeve.
Plunger Packing Kit
Valve Kit
# 09606*
# 09526 - GP7150A
Item
38A
38B
39A
41
Part #
13156
06258
07796
07636
07638
Description
O-Ring
O-Ring
Compact Ring
O-Ring
V-Sleeve
Qty.
Item
51B
51C
51D
51E
51F
51G
51H
56A
56B
56C
56D
Part #
Description
Valve Spring Guide
Valve Spring
Valve Plate
Valve Seat
O-Ring
Support Ring
O-Ring
O-Ring
Qty.
1
1
1
1
2
2
2
2
3
3
3
3
6
08282
07732-0100
13164
08283
07653
13166
07266
07658
07635
13166
07653
42
Plunger Packing Kit
# 9220 - GP7155A & GP7255A
Item
38A
38B
39A
41
Part #
13156
07721
07223
13158
07711
Description
O-Ring
O-Ring
Compact Ring
O-Ring
V-Sleeve
Qty.
Support Ring
Support Ring
O-Ring
2
1
1
3
3
3
3
6
* Note: When ordering a valve kit for a pump produced
prior to 11/03, order kit #09222, which replaces part
08281 with p/n 13163. Kit 09222 does not require p/n
08282.
42
Oil Seal Kit - # 09221
Item
32
32A
33A
Part #
07624
07625
07627
Description
Radial Shaft Seal
Shaft Seal
Qty.
3
3
3
O-Ring
5
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Specifications
Model GP7150A
................................................................ U.S. ........................ Metric
Volume.................................................... 54.5 GPM .............. 206 LPM
Discharge Pressure ................................. 1900 PSI ................. 131 Bar
Speed ....................................................................................... 700 RPM
Inlet Pressure .......................................... 140 PSI .................. 10 Bar
Plunger Diameter.................................... 1.97” ...................... 50mm
Plunger Stroke ........................................ 1.89” ...................... 48mm
Crankshaft Diameter............................... 1.89” ...................... 48mm
Key Width............................................... 0.55” ...................... 14mm
Crankshaft Mounting............................................................... Either side
Shaft Rotation .......................................................................... Top of pulley towards manifold
Max.Temperature of Pumped Fluids ...... 140 oF .................... 60 oC
Inlet Ports ................................................................................ (2) 2-1/2" NPT
Discharge Ports........................................................................ (2) 1-1/4" NPT
Weight.....................................................374 lbs. ................... 170 kg
Crankcase Oil Capacity .......................... 1.6 Gal. ................... 6.0 liters
Fluid End Material .................................................................. Bronze
Mechanical Effecency @ 700 RPM ........................................ 0.83
Volumetric Effecency @ 700 RPM ......................................... 0.96
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.
PULLEY INFORMATION
HORSEPOWER INFORMATION
Pulley selection and pump speed are based on a 1725 Horsepower ratings shown are the power require-
RPM motor and "B" section belts. When selecting ments for the pump. Gas engine power outputs must
desired GPM, allow for a ±5% tolerance on pumps be approximately twice the pump power require-
output due to variations in pulleys, belts and motors ments shown above.
among manufacturers.
1. Select GPM required, then select appropriate when selecting an electric motor as the power source.
motor and pump pulley from the same line. To compute specific pump horsepower requirements,
2. The desired pressure is achieved by selecting the use the following formula:
We recommend that a 1.1 service factor be specified
(GPH X PSI) / 1450 = HP
correct nozzle size that corresponds with the pump
GPM.
GP7150A PULLEY SELECTION & HORSEPOWER REQUIREMENTS
PUMP
PULLEY PULLEY
MOTOR
RPM GPM 800 PSI 1000 PSI 1300 PSI 1500 PSI 1900 PSI
12.75
12.75
12.75
12.75
12.75
5.75
7.50
9.25
11.00
12.75
300 23.4
400 31.2
500 38.9
600 46.7
700 54.5
13.4
17.8
22.2
26.7
31.1
16.7
22.3
27.8
33.4
38.9
21.7
29.0
36.1
43.4
50.6
25.1
33.4
41.7
50.0
58.4
31.8
42.3
52.8
63.4
74.0
6
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GP7150A, GP7155A, GP7255A REPAIR INSTRUCTIONS
TO CHECK VALVES
Lossen plugs (58), take out tension spring (57) and then remove the complete valve (51) with either a valve tool or an
M16 hexagon screw. Remove valve adapter (56) and tension spring (57) with pull-out tool size 5. There is an O-ring
(51G) under both the suction and the discharge valve each of which can be removed with a bent piece of wire.To
disassemble valve hit the top of the valve plate (C) carefully with a bolt and press the valve seat (A) out of the spacer
pipe (E). Check sealing surfaces and replace worn parts. Check O-rings and support rings.Tighten plugs (58) to 107 ft.
lbs.
TO CHECK SEALS AND PLUNGER PIPE
Loosen nuts (49A) and remove pump head. Separate plunger connection (36A) from crosshead (25) by means of two
open-end wrenches (size 22 and 27). Pull seal sleeves (39) out of their fittings in the crankcase.
Take seal case (38) out of seal sleeve (39). Examine plunger parts (36A-36D), seals (42,39A) and O-rings.
When replacing plunger pipe (36B), tighten tension screws (36C) to 30 ft. lbs.
Replace worn parts; grease seals with Silicone before installing.
CAUTION:
Don't loosen the 3 plunger connections (36A) before the valve casing has been removed otherwise the
tension screw (36C) could hit against the spacer pipe (51E) when the pump is being turned. Seal life
can be increased if the pretensioning allows for a little leakage. This assists lubrication and keeps the
seals cool. It is therefore not necessary to replace seals before the leakage becomes too heavy and
causes output and operating pressure to drop.
MOUNTING VALVE CASING
Check O-rings on seal case (38). Clean surfaces of seal sleeves in gear box and sealing surfaces of
valve casing. Push valve casing carefully on O-rings of seal case and centering studs (50A). Tighten nuts (49A) to 103
ft. lbs.
TO DISASSEMBLE GEAR
Take out plunger and seal sleeves as described above. Drain oil. After removing the circleclip 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.
Note:
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 connecing rod and crankshaft (22) take out
bearing cover to one side and push out crankshaft taking particular care that the conrod doesn't gt bent.
Note:
Seal (32A) must always be installed so taht the seat up on the inside diameter faces the oil.
Reassemble in revers order: Regulate axial bearing clearance minimum 0.1mm, maximum 0.15-by
Preventative Maintenance Check-List & Recommended Spare Part List
Check
Daily
Weekly 50hr
Every
500 hr
Every
1500 hr
Every
3000hrs
Oil Level / Quality
Oil Leaks
Water Leaks
Belts, Pulley
Plumbing
X
X
X
X
X
Recommended Spare Part
Oil Change (p/n 01154)
X
X
X
X
Plunger Packing Kits(1 kit/Pump)
See page 5 for kit list
Oil Seal Kit ( 1 kit/Pump
See page 5 for kit list)
Valve Assembly Kit ( 1 kit/pump)
See page 5 for kit list
X
7
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GP7150A, GP7155A, GP7255A SERIES DIMENSIONS - INCHES (mm)
GIANT INDUSTRIES LIMITED WARRANTY
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 self-service car wash applications, the discharge manifolds will never
fail, period. If they ever fail, we will replace them free of charge. Our other pump parts, used in portable
pressure washers and in car wash applications, are warranted for five years from the dateof 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.
Liabilityunderthiswarrantyisonallnon-wearpartsandlimitedtothereplacementorrepairofthoseproductsreturned
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 REPRESENTA-
TION, EXPRESSORIMPLIED, INCLUDINGWITHOUTLIMITATIONANYWARRANTIESORMERCHANTABILITY
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
(419) 531-4600
FAX (419) 531-6836
Copyright 2006 Giant Industries, Inc.
03/06 GP7150A, GP7155A, GP7255A.PM6
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