Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service
Manual
Model
GP7132 & GP7136
Contents:
Installation Instructions: page 2
Pump Specifications GP7132: page 3
Exploded View: page 4
Parts List/Kits page 5
Pump Specifications GP7136: page 6
Repair and Service: pages 7-9
Torque Specs: page 9
Trouble Shooting Chart: page 10
Recommended Spare
Parts List: page 10
Dimensions: page 11
Warranty Information: back page
INSTALLATION INSTRUCTIONS
Installation of the Giant Industries, Inc., pump
is not a complicated procedure, but there are
some basic steps common to all pumps. The
following information is to be considered as a
general outline for installation. If you have
unique requirements, please contact Giant
Industries, Inc. or your local distributor for
assistance.
1. The pump should be installed flat on a base to a
maximum of a 15 degree angle of inclination to
ensure optimum lubrication.
2. The inlet to the pump should be sized for the flow
rate of the pump with no unnecessary restrictions
that can cause cavitation. Teflon tape should be
used to seal all joints. If pumps are to be operated at
temperatures in excess of 140
insure a positive head to the pump to prevent cavitation.
3. The discharge plumbing from the pump should be
properly sized to the flow rate to prevent line pressure loss to the work area. It is essential to provide
a safety bypass valve between the pump and the
work area to protect the pump from pressure spikes
in the event of a blockage or the use of a shut-off gun.
4. Use of a dampener is necessary to minimize
pulsation at drive elements, plumbing, connections,
and other system areas. The use of a dampener
with Giant Industries, Inc. pumps is optional, although
recommended by Giant Industries, Inc. to further
0
F, it is important to
°
reduce system pulsation. Dampeners can also
reduce the severity of pressure spikes that occur
in systems using a shut-off gun. A dampener
must be positioned downstream from the unloader.
5. Crankshaft rotation on Giant Industries, Inc.
pumps should be made in the direction designated by the arrows on the pump crankcase.
Reverse rotation may be safely achieved by
following a few guidelines available upon request
from Giant Industries, Inc. Required horsepower
for system operation can be obtained from the
chart on pages 3 & 6.
6. Before beginning operation of your pumping
system, remember: Check that the crankcase
and seal areas have been properly lubricated per
recommended schedules. Do not run the pump
dry for extended periods of time. Cavitation will
result in severe damage. Always remember to
check that all plumbing valves are open and that
pumped media can flow freely to the inlet of the
pump.
Finally, remember that high pressure
operation in a pump system has many
advantages. But, if it is used carelessly
and without regard to its potential hazard,
it can cause serious injury.
IMPORTANT OPERATING CONDITIONS
Failure to comply with any of these
conditions invalidates the warranty
1. Prior to initial operation, add oil to crankcase so
that the oil level is between the two lines on the oil
dipstick. DO NOT OVERFILL. SAE 80 Indus-
trial Gear oil may be used. Crankcase oil should
be changed after the first 50 hours of operation,
then at regular intervals of 500 hours or less depending on operating conditions.
2. Pump operation must not exceed rated
pressure, volume, or RPM.
device must be installed in the discharge of the
system.
3. Acids, alkalines, or abrasive fluids cannot be
pumped unless approval in writing is obtained
before operation from Giant Industries, Inc.
4. Run the pump dry approximately 10 seconds
to drain the water before exposure to freezing
temperatures.
A pressure relief
2
0 1500 3000 4500
PSI
95
90
85
80
75
70
LP [dB(A)]
n-500 (1/min)
n-300 (1/min)
n-750 (1/min)
3000 PSI
4350 PSI
Specifications
Model GP7132
Volume ........................................................................................................ Up to 23.4 GPM
Discharge Pressure .................................................................................... Up to 4350 PSI
Speed .......................................................................................................... Up to 750 RPM
Inlet Pressure .............................................................................................. Up to 90 PSI
Plunger Diameter ........................................................................................ 32mm
Plunger Stroke ............................................................................................ 52mm
Crankshaft Diameter .................................................................................. 48mm
Key Width ................................................................................................... 14mm
Crankshaft Mounting .................................................................................. Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids................................................................... Up to 140
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 ............................................................ 94%
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.
o
F
NPSHR Chart Decible Chart
26.2
23.0
19.7
16.4
13.1
9.8
6.6
3.3
NPSHR(FT-HEAD) Viscosity = 1 Centipoise
0 500 600 700 800
GP7132 HORSEPOW ER REQUIRMENTS
RPM GPM 1000 PSI 1400 PSI 2000 PSI 2500 PSI
300 9.4 6.7 9.4 13.4 16.7 20.1 29.1
400 12.5 8.9 12.5 17.8 22.3 26.7 38.8
550 17.2 1 2.3 17.2 24.5 30.6 36. 8 53.3
600 18.7 1 3.4 18.7 26.7 33.4 40. 1 58.2
650 20.3 1 4.5 20.3 29.0 36.2 43. 5 63.0
700 21.8 1 5.6 21.8 31.2 39.0 46. 8 67.9
750 23.4 1 6.7 23.4 33.4 41.8 50. 1 72.7
HORSEPOWER RATINGS:
The rating shown are the power requirements for the
pump. Gas engine power outputs must be
approximately twice the pump power requirements
shown above.
We recommend a 1.1 service factor be specified
when selecting an electric motor as the power
source.
To compute specific pump horsepower requirements,
use the following formula:
GPM X PSI
1400
3
Exploded View - GP7132 and GP7136 Pumps
4
GP7132 and GP7136 PARTS LIST
ITEM PART DESCRIPTION QTY.
1 07600 Crankcase 1
2 13000 Oil Filler Plug Assembly 1
4 07601 Crankcase Cover 1
5 07602 Seal for Cover 1
8 07603 Oil Dip Stick 1
9 01009 O-Ring, Dip Stick 1
10 13133 Hexagon Screw 12
11 06725 Spring Washer 12
12 07109 Drain Plug 2
13 07182 Gasket, Drain Plug 2
14 07607 Bearing Cover 2
15 07608 Radial Shaft Seal 2
16 07184 O-Ring, Bearing cover 2
20 07610 Taper Roller Bearing 2
20A 07611 Fitting Disc (Shim) 1-5
21 07612 Shaft Protector 1
22 13405 Crankshaft 1
23 07614 Key 1
24 13182 Connecting Rod Assy. 3
24A 07616 Fitting Screw 6
24B 08041 Washer 6
25 13183 Crosshead Assy. 3
28 13184 Crosshead Pin 3
30 07619 Cover Plate 1
3 0 A 07225-0100 Hexagon Screw 8
30B 13136 Grommet 4
30C 07622 Washer 8
30D 13154 Cover 1
31 07623 Eye Bolt 1
32 07624 Radial Shaft Seal 3
32A 07625 Compact Ring 3
33 07626 Seal Retainer 3
33A 07627 O-Ring , Seal Retainer 3
33B 07628 Circlip, Seal Retrainer 3
33C 07249 Shim 3
34 13137 Flinger 3
36 06091 Plunger Assembly (36A-36D)
GP7132 3
36 06792 Plunger Assembly (36A-36D)
GP7136 3
36 A 07667 Plunger Base 3
36B 06092 Plunger Pipe, GP7132 3
36B 06793 Plunger Pipe, GP7136 3
36C 07664 Tensioning Screw 3
ITEM PART DESCRIPTION QTY.
36D 07665 Copper Ring 3
38 06093 Seal Case 3
38 A 13141 O-Ring, Seal Case 6
38B 13142 Support Ring 6
39 06094 Seal Sleeve, GP7132 3
39 06794 Seal Sleeve, GP7136 3
39A 13360 Grooved Ring, GP7132 3
39A 13291 Grooved Ring, GP7136 3
41 06095 Pressure Ring, GP7132 3
41 06795 Pressure Ring, GP7136 3
42 06096 V-Sleeve, GP7132 6
42 06796 V-Sleeve, GP7136 6
43 06097 Sleeve Support Ring, GP7132 3
43 06797 Sleeve Support Ring, GP7132 3
45 06098 Tension Spring 3
49 13159 Stud Bolt 8
49A 13160 Nut 8
50 06798 Valve Casing 1
50A 13162 Cylinder Stud 2
51 13146 Inlet Valve Assy. 3
51A 12056 Support Ring 6
51B 07354 O-Ring 6
51C 13131 Inlet Valve Seat 3
51D 13130 Valve Plate 6
51E 07062 Valve Spring 6
51F 13147 Spacer Pipe 6
52 13148 Discharge Valve Assy. 3
57 06078 Compression Spring 3
52C 13149 Discharge Valve Seat 3
58 07699 Plug 3
58 A 07700 O-Ring 3
58B 07693 Support Ring 3
58C 07702 Hexagon Screw 12
59 07703 Plug, 3/4" 3
59A 07704 Copper Ring for 59 3
60 12253 Plug, 3/4 NPT, GP7132 1
60 13150 Plug, 3/4 BSP, GP7136 1
61 12251 Plug, 1-1/4 NPT, GP7132 1
61 13151 Plug, 1-1/4 BSP, GP7136 1
62 07662 Tool for valve assembly
(not shown) 1
66 13362 Disc for Crankshaft 1
67 13358 Hexagon Screw 1
GP7132 and GP7136 PUMP REPAIR KITS
Plunger Packing Kit
# 09519 (GP7132)
Item Part # Description Qty.
38A 13141 O-Ring, Seal Case 6
38B 13142 Support Ring 6
39A 13360 Grooved Ring 3
42 06096 V-Sleeve 6
Oil Seal Kit
# 09225
Item Part # Description Qty.
32 07624 Radial Shaft Seal 3
32A 07625 Ring 3
33A 07627 O-Ring 3
Plunger Packing Kit
# 09544 (GP7136)
Item Part # Description Qty.
38A 13141 O-Ring, Seal Case 6
38B 13142 Support Ring 6
39A 13291 Grooved Ring 3
42 06796 V-Sleeve 6
5
Valve Assembly Kit
#09520
Item Part # Description Qty.
51A 12056 Support Ring 6
51B 07354 O-Ring 6
51C 13131 Inlet Valve Seat 3
51D 13130 Valve Plate 6
51E 07062 Valve Spring 6
52C 13149 Discharge Valve Seat 3
58 A 07700 O-Ring 3
58B 07693 Support Ring 6
Specifications
Model GP7136
Volume ........................................................................................................ Up to 28.3 GPM
Discharge Pressure .................................................................................... Up to 3625 PSI
Speed .......................................................................................................... Up to 750 RPM
Inlet Pressure .............................................................................................. -4.35 to 140 PSI
Plunger Diameter ........................................................................................ 36mm
Plunger Stroke ............................................................................................ 52mm
Crankshaft Diameter .................................................................................. 48mm
Key Width ................................................................................................... 14mm
Crankshaft Mounting .................................................................................. Either side
Shaft Rotation ................................................................................ Top of pulley towards manifold
Temperature of Pumped Fluids ................................................................... Up to 140
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 ............................................................ 94%
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.
o
F
NPSHR Chart Decible Chart
26.2
23.0
19.7
16.4
13.1
9.8
6.6
3.3
NPSHR(FT-HEAD) Viscosity = 1 Centipoise
0 200 400 600 800
RPM
95
90
85
80
LP [dB(A)]
75
70
0 750 1500 2250 3000 3750
n-700 (1/min)
n-500 (1/min)
n-300 (1/min)
(PSI)
GP7136 HORSEPOWER REQUIREMENTS
RPM GPM 1000 PSI 1400 PSI 2000 PSI 2500 PSI 3625 PSI
300 11.3 8.1 11.3 16.1 20.2 29.3
400 15.0 10.7 15.0 21.4 26.8 38.8
550 20.8 14.9 20.8 29.7 37.1 53.9
600 22.6 16.1 22.6 32.3 40.4 58.5
650 25.0 17.9 25.0 35.7 44.6 64.7
700 26.4 18.9 26.4 37.7 47.1 68.4
750 28.3 20.2 28.3 40.4 50.5 73.3
HORSEPOWER RATINGS:
The rating shown are the power requirements for the
pump. Gas engine power outputs must be
approximately twice the pump power requirements
shown above.
We recommend a 1.1 service factor be specified
when selecting an electric motor as the power
source.
To compute specific pump horsepower requirements,
use the following formula:
GPM X PSI
6
GP7132 AND GP7136 REPAIR INSTRUCTIONS
NOTE: Always take time to lubricate all metal and non-metal parts with a light film of oil
before reassembling. This step will help ensure proper fit, at the same time protecting
the pump non-metal parts (elastomers) from cutting and scoring.
1. Lossen screws (58C), take
plugs (58) out of valve casing with two screws.
51F 51E 51C 51B 51A 51C or 52C
or 52C
4. Check surfaces of valve plate, valve seat, O-rings (51B, 58A) and
2. Take out complete valve
(51) using either tool (part
#07662) or stud bolt.
replace worn parts.
6. Loosen nuts (49A) 7. Remove pump head.
3. Valve seats (51C and 52C)
are pressed out of spacer
pipe (51F) by hitting the
valve plate (51D) with a
bolt.
S
P
5. 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
155 ft-lbs.
7
GP7132 AND GP7136 REPAIR INSTRUCTIONS
8. Separate plunger (36) from
crosshead (25) by means of
one open-end wrench.
9. Pull seal sleeves (39) out of
their fittings in the crankcase.
Take seal case (38) out of
seal sleeve (39).
38A 38B 38 38B 38A 36
10. If o-rings (38A) or support rings (38B) are damaged, replace with
new parts. Examine plunger (36) for wear.
39A 39 41 42 43 45
11. Take a thin screw driver and pry out the grooved ring (39A). Note:
This seal (39A) will not be reusable, so replace with a new
part. For the seal-pack (41-43), remove with either a socket wrench
or use a screw driver to push against the rear lip of the pressure
ring (41) or v-sleeves (42). You will need to remove seals evenly
out of the seal sleeve (39). Be careful not to score the sleeve or
metal parts (41 & 43).
8
GP7132 AND GP7136 REPAIR INSTRUCTIONS
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 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
NOTE: Replace worn parts; grease seals with silicone before installing.
12. Check O-rings (38A) and support rings (38B) on seal case (38). Clean surfaces of seal sleeves in gear box
and sealing surfaces of valve casing. Reassemble seal sleeve (39) by placing plunger (36) in seal sleeve;
place pressure ring (41), v-sleeves (42), sleeve support ring (43), and tension spring (45) over plunger (36).
Place the seal case onto the seal sleeve and press into the crankcase, making sure that the weep hole on
the seal sleeve is facing down. Tighten tensioning screw (36C) for plunger onto crosshead (25) with an
open end wrench to 26 ft-lbs.
13. Push valve casing carefully onto O-rings of seal case and centering studs (50A). Tighten nuts (49A) to103
ft-lbs.
TO DISASSEMBLE GEAR
14. Take out plunger (36) and seal sleeves (39) as described above. Drain oil.
15. After removing the circlip ring (33B), lever out seal retainer (33) with a screw driver. Check seals
(32,32A,33A) and surfaces of crosshead.
16. 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.
17. Check surfaces of connecting rod and crankshaft (22). Take out bearing cover (14) to one side and push
out crankshaft taking particular care that the connecting rod (24) doesn't bend.
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). The crankshaft (22) should turn easily with little
clearance. Tighten fitting screws (24A) to 30 ft.-lbs.
CAUTION: Connecting rod (24) has to be able to be slightly moved sidewise at the stroke journals.
GP7132 and GP7136 TORQUE SPECIFICATIONS
Position Item# Description Torque Amount
24A 07616 Fitting Screw 30 ft-lbs.
36C 07664 Tensioning Screw 26 ft.-lbs.
49 A 13160 N u t 103 ft.-lbs.
58 07699 Plug 155 ft.-lbs.
9
PUMP SYSTEM MALFUNCTION
MALFUNCTION CAUSE REMEDY
The Pressure and/ Worn packing seals Replace packing seals
or the Delivery Broken valve spring Replace spring
Drops Belt slippage Tighten or Replace belt
Worn or Damaged nozzle Replace nozzle
Fouled discharge valve Clean valve assembly
Fouled inlet strainer Clean strainer
Worn or Damaged hose Repair/Replace hose
Worn or Plugged relief valve on pump Clean, Reset, and Replace worn parts
Cavitation Check suction lines on inlet of
pump for restrictions
Unloader Check for proper operation
Water in crankcase High humidity Reduce oil change interval
Worn seals Replace seals
Noisy Operation Worn bearings Replace bearings, Refill crankcase
oil with recommended lubricant
Cavitation Check inlet lines for restrictions
and/or proper sizing
Rough/Pulsating Worn packing Replace packing
Operation with Inlet restriction Check system for stoppage, air
Pressure Drop leaks, correctly sized inlet
plumbing to pump
Accumulator pressure Recharge/Replace accumulator
Unloader Check for proper operation
Cavitation Check inlet lines for restrictions
and/or proper size
Pump Pressure as Restricted discharge plumbing Re-size discharge plumbing to Drop at
g u n flow rate of pump Rated,
Pressure
Excessive Worn plungers Replace plungers
Leakage Worn packing/seals Adjust or Replace packing seals
Excessive vacuum Reduce suction vacuum
Cracked plungers Replace plungers
Inlet pressure too high Reduce inlet pressure
High Crankcase Wrong Grade of oil Giant oil is recommended
Temperature Improper amount of oil in crankcase Adjust oil level to proper amount
Preventative Maintenance Check-List & Recommended Spare Parts List
Check Daily Weekly 50hrs Every Every Every
500 hrs 1500 hrs 3000 hrs
Oil Level/Quality X
Oil Leaks X
Water Leaks X
Belts, Pulley X
Plumbing X
Recommended Spare Parts
Oil Change (1 Gallon) p/n 1154 X X
Plunger Packing Kits (1 kit/pump) X
(See page 5 for kit list)
Valve Assembly Kit (1 kit/pump) X
(See page 5 for kit list)
Oil Seal Kit (1 kit/pump) X
(See page 5 for kit list)
10
GP7132 and GP7136 Dimensions (Inches)
11
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
manufacturers 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, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRAN-
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
Phone: (419)-531-4600 FAX (419)-531-6836, www.giantpumps.com
Ó Copyright 2002 Giant Industries, Inc.
Rev. 1 1/02 GP7132_GP7136.PM6
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