Giant LP301A User manual

Triplex Ceramic
Plunger Pump
Operating Instructions/
Manual
Contents:
Installation Instructions: page 2
LP301A/LP600 Specications: page 3
Exploded View: page 4
Parts List: page 5
Repair Kits: page 6
Repair Instructions: page 7-10
Pump Mounting Selection Guide: page 10
Torque Specications: page 10
Trouble Shooting/Preventative
Maintenance Check-List
& Recommended Spare Parts List: page 11
Dimensions: back page
Warranty Information: back page
Models
LP301A, LP301A-SSP
LP301A-4000, LP600
and LP600-4000
Updated 07/18

2
INSTALLATION INSTRUCTIONS
When the pump is in operation, the open shaft
end must be covered up by a shaft protector
(21). For direct drive operations, the driven
shaft side and coupling must have a guard
over the connected area.
Pressure in discharge line and in pump must
be at zero before any maintenance to the
pump takes place. Close the uid supply to
the inlet port(s). Disconnect fuses to ensure
that the driving motor does not accidentally get
switched on. Make sure that all parts on the
pressure side of the unit are vented and re-
lled, with pressure at zero, before starting the
pump.
In order to prevent air, or air/water mixture
being absorbed and to prevent cavitation oc-
curring, the pump-npshr, positive suction head
and water temperature must be kept under
control.
Required NPSH refers to water: Specic
weight 0.0624 lb/ft3 (1kg/dm3), viscosity 1°E at
maximum permissible revolutions.
Cavitation and/or compression of gases
lead to uncontrollable pressure kicks which
can ruin pump and unit parts and also be
dangerous to the operator or anyone stand-
ing nearby.
Giant pumps are suitable for pumping clean
water and other non-aggressive or abrasive
media with a specic weight similar to water.
Before pumping other liquids - especially
inammable, explosive and toxic media -
the pump manufacturer must under all cir-
cumstances be consulted with regard to the
resistance of the pump material. It is the re-
sponsibility of the equipment manufacturer
and/or operator to ensure that all pertinent
safety regulations are adhered to.
Operation and Maintenance
Check oil level prior to starting and ensure
trouble free water supply.
IMPORTANT! If there is a danger of frost,
the water in the pump and in the pump ttings
(particularly the unloader valve) must be emp-
tied. The second discharge port can also be
used and the pump run “dry” for 1-2 minutes
for this purpose.
Oil: Use only 118 uid ounces (3.5 L) of SAE
90 Industrial gear lube oil. (Giant’s p/n 01154)
Initial change after 50 operating hours and
then every 1000 operating hours, or after one
year if used less.
Caution! When operating in damp places or
with high temperature uctuations, conden-
sate (frothy oil) might occur in the gear box.
In this situation, change the oil immediately.
Keep NPSH under control.
Maximum input pressure is 145 PSI (10 bar),
the maximun suction head is -4.35 PSI (-0.3
bar). Make sure that suction pulsation is suf-
ciently dampened. Water column resonance
must be avoided.
Safety Rules
Pump operation without safety valve as well
as any excess in temperature or speed limits
automatically voids the warranty. The safety
valve must be regulated in accordance with
the guidelines for liquid spraying units so that
the admissible operating pressure can not be
exceeded by more than 10%.
NOTE: Contact Giant Industries for Service School Information. Phone: [phone]

3
Model LP301A/LP301A-SSP/LP301A-4000 Specications
PULLEY INFORMATION
Pulley selection and pump speed are based on a 1725
RPM motor and “B” section belts. When selecting de-
sired GPM, allow for a ±5% tolerance on pumps output
due to variations in pulleys, belts and motors among
manufacturers.
1. Select GPM required, then select appropriate motor
and pump pulley from the same line.
2. The desired pressure is achieved by selecting the cor-
rect nozzle size that corresponds with the pump GPM.
HORSEPOWER INFORMATION
We recommend that a 1.15 service factor be specied
when selecting an electric motor as the power source.
To compute specic pump horsepower requirements,
use the following formula:
HP = (GPM X PSI) / 1450
U.S. Metric
Ratings (continuous)..............................................14.2 GPM @ 4000 PSI @ 1000 RPM.............. 53.6 LPM
Ratings (intermittent)*............................................18 GPM @ 4000 PSI @ 1268 RPM................. 68.1 LPM
Power Required (continuous)................................37.9 BHP............................................................ 28.3 kW
Power Required (intermittent)................................50 BHP.................................................................. 37 kW
Inlet Pressure ........................................................-4.35 to 145 PSI .........................................-0.3 to 10 Bar
Plunger Diameter...................................................0.95” .................................................................... 24 mm
Stroke ....................................................................1.65” .................................................................... 42 mm
Crankcase Oil Capacity.........................................118 .oz.............................................................3.5 Liters
Temperature of Pumped Fluids .............................140 oF......................................................................60 oC
Inlet Port ........................................................................................................................................1-1/4” BSP
Discharge Port..................................................................................................................................... 1” BSP
Crankshaft Mounting .....................................................................................................................Either Side
Shaft Rotation.............................................................................................. Top of Pulley Towards Fluid End
Weight ...................................................................119 lbs.....................................................................54 kg
Crankshaft Diameter........................................................................................................................... 35 mm
NPSHR..................................................................25.9 ft.-head ...................................................... 7.9 mWs
*Intermittent duty only
LP301A PULLEY SELECTION AND
HORSEPOWER REQUIREMENTS
RPM GPM 2500 PSI 3000 PSI 3500 PSI 4000 PSI
500 7.05 12.2 14.6 17.0 19.4
640 9.02 15.6 18.7 21.8 24.9
750 10.57 18.2 21.9 25.5 29.2
805 11.35 19.6 23.5 27.4 31.3
865 12.2 21.0 25.2 29.4 33.7
940 13.25 22.8 27.4 32.0 36.6
1000 14.2 24.5 29.4 34.3 39.2
1268 18.0* 31.0 37.2 43.4 49.7*
LP600 PULLEY SELECTION AND
HORSEPOWER REQUIREMENTS
GPM RPM 3000 PSI 4000 PSI 5000 PSI 5800 PSI
4.85 500 10.1 13.5 16.8 19.4
6.2 640 12.9 17.2 21.5 24.8
7.28 750 15.2 20.2 25.3 29.1
7.8 805 16.3 21.6 27.1 31.2
8.4 865 17.5 23.3 29.1 33.6
9.1 940 18.9 25.2 31.6 36.4
9.7 1000 20.2 26.9 33.7 38.8
U.S. Metric
Volume....................................................................Up to 9.8 GPM.................................................... 37 LPM
Discharge Pressure................................................5800 PSI.............................................................400 Bar
Power Required......................................................40.5 BHP ........................................................... 30.2 kW
Inlet Pressure .........................................................-4.35 to 145 PSI .........................................0.3 to 10 Bar
Speed ............................................................................................................................................ 1000 RPM
Plunger Diameter....................................................0.79” .................................................................... 20 mm
Stroke .....................................................................1.65” .................................................................... 42 mm
Crankcase Oil Capacity..........................................118 .oz. ............................................................3.5 liters
Temperature of Pumped Fluids ..............................140 oF.....................................................................60 oC
Inlet Port ........................................................................................................................................1-1/4” BSP
Discharge Port..................................................................................................................................... 1” BSP
Crankshaft Mounting .....................................................................................................................Either Side
Shaft Rotation.............................................................................................. Top of Pulley Towards Fluid End
Weight ....................................................................119 lbs. ...................................................................54 kg
Crankshaft Diameter............................................................................................................................ 35 mm
NPSHR...................................................................24.9 ft.-head ..................................................... 7.6 mWs
Model LP600/LP600-4000 Specications
*Intermittent duty for pump speeds in excess of 805 RPM

4
Exploded View
LP301A/LP301-SSP/LP301A-4000/LP600/LP600-4000
Important! The stainless steel valve plugs (48) can seize when being screwed out of the cas-
ing. To release tension beforehand, strike the plugs 1-2 times with a steel hammer on the top
before screwing them out. Coat threads with antiseize (e.g. Fel-Pro Nickel Anti-Seize 51119)

ITEM PART DESCRIPTION QTY
39 13012 O-Ring (LP600/LP600-4000) 3
39 12055 O-Ring (LP301A/LP301A-4000) 3
39A 13036 Support Ring for 39
(LP600/LP600-4000) 3
39A 07693 Support Ring for 39
(LP301A/LP301A-4000) 3
40 07322 V-Sleeve (LP600/LP600-4000) 3
40 06083 V-Sleeve (LP301A/LP301A-4000) 6
40A 07268 Pressure Ring (LP600) 3
40A 07268-0100 Pressure Ring, 316 S.S.
(LP600-4000) 3
40A 13366 Pressure Ring (LP301A) 3
40A 13366-0100 Pressure Ring, 316 S.S
(LP301A-4000) 3
40B 07270 Support Ring for 40 (LP600) 3
40B 07270-0100 Support Ring for 40, 316 S.S.
(LP600-4000) 3
40B 13367 Guide Ring for 40 (LP301A) 3
40B 13438 Guide Ring for 40, 316 S.S.
(LP301A-4000) 3
40C 05963 Sleeve (LP600/LP600-4000) 3
41 07338 Pressure Spring
(LP301A/LP301A-4000 Only) 3
43 13040 Valve Casing 1
44A 07150 O-Ring 9
44B 06266 Support Ring for O-Ring 3
45 06078 Compression Spring 3
46 08286 Valve Assy.,Complete
(LP600/LP600-4000) 6
46 07060 Valve Assy., Complete
(LP301A/LP301A-4000) 6
46A 07064 Valve Seat (LP301A/LP301A-4000) 6
46A 07064-0100 Valve Seat (LP600/LP600-4000) 6
46B 13130 Valve Plate (LP600/LP600-4000) 6
46B 07063 Valve Plate (LP301A/LP301A-4000) 6
46C 07062-0100 Valve Spring 6
46D 07066 Spacer Pipe
(LP301A/LP301A-4000) 6
46D 05472 Spacer Pipe (LP600/LP600-4000) 6
46E 05473 Valve Spring Guide
(LP600/LP600-4000) 6
48 06077 Plug 3
49 07157 Stud bolt 8
49A 07158 Hexagon Nut 8
49B 07159 Disc 8
50 12250 Plug, 1/2” BSP, S.S.
(LP301A/LP301A-4000 Only) 1
50A 06807 Steel Ring 1
52 13020 Disc for Crankshaft 1
53 04561 Hexagon Screw 1
54 13044* Plug, 1” BSP 1
55 13151* Plug, 1-1/4” BSP 1
ITEM PART DESCRIPTION QTY
1 07759 Crankcase 1
2 13000 Oil Filler Plug Assembly 1
3 05940 Cover Plate 1
3A 07223-0100 Spring Ring 2
3B 05051 Hexagon Screw 2
4 06085 Crankcase Cover 1
5 07104 O-ring, Crankcase Cover 1
6 05943 Oil Sight Glass w/Gasket 1
8 06086 Oil Dipstick Assembly 1
9 01009 O-Ring, (For Dipstick) 1
10 01010 Cylinder Screw (LP600/LP301A) 4
10 01010-0100 Cylinder Screw, 316 S.S.
(LP600-4000/LP301A-4000) 4
11 01011-0400 Spring Ring (LP600/LP301A) 5
11 01011-0100 Spring Ring, 316 S.S.
(LP600-4000/LP301A-4000) 5
12 07109 Plug, G1/2” (LP600/LP301A) 1
12 07109-0400 Plug, G1/2”, 316 S.S.
(LP600-4000/LP301A-4000) 1
13 06015 O-Ring 1
14 07111 Bearing Cover 2
15 07112 Radial Shaft Seal 2
16 07113 O-Ring for Bearing Cover 2
17 07114 Hexagon Screw (LP600/LP301A) 8
17 07114-0100 Hexagon Screw, 316 S.S
(LP600-4000/LP301A-4000) 8
20 07116 Taper Roller Bearing 2
20A 07117 Shim, 0.1 mm 1-3
20B 13001 Shim, 0.15 mm 1-3
20C 04491 Shim, 0.2 mm (May not be present) 1-3
21 05376 Shaft Protector 1
21A 05377 Shaft Guard Holder 1
22 13242 Crankshaft 1
23 13243 Key 1
24 13340 Connecting Rod Assembly 3
24A 13277 Inner Hex Screw 6
24B 13278 Spring Washer 6
25 13341 Crosshead Assembly 3
28 13232 Crosshead Pin 3
29A 07125 Centering Sleeve 3
29B 07126 Plunger Pipe (LP600/LP600-4000) 3
29B 07127 Plunger Pipe (LP301A/LP301A-4000) 3
29B 07127-SS Hard Metal Plunger (LP301A-SSP) 3
29C 13031 Tensioning Screw 3
29D 07755 Copper Ring (LP600/LP301A) 3
29D 07161A-0100 Crush Washer
(LP600-4000/LP301A-4000) 3
30 07779 Oil Scraper 3
31 07133 Oil Seal 3
35 04572 Seal Sleeve (LP600/LP600-4000) 3
35 13364 Seal Sleeve (LP301A/LP301A-4000) 3
36 13237 Leakage Seal (LP600/LP600-4000) 3
36 13238 Leakage Seal (LP301A/LP301A-4000) 3
37 13239 Seal Case (LP600/LP600-4000) 3
37 13240 Seal Case (LP301A/LP301A-4000) 3
38 07140 O-Ring, Seal Case 3
38A 13241 Support Ring for 38 3
Parts List
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000
*BSP to NPT Adapters/Seals (sold separately)
Inlet Port = 13377 (Adapter) / 13376 (Seal)
Discharge Port = 13373+(Adapter) / 13372 (Seal)
+rated up to 3000 PSI. For higher pressure adapters, contact Giant.
5

Repair Kits
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000
6
LP301A - # 09459
For pumps manufactured on or after 4/96
Item Part # Description Qty.
36 13238 Leakage Seal 3
38 07140 O-Ring 3
38A 13241 Support Ring 3
39 12055 O-Ring 3
39A 07693 Support Ring 3
40 06083 V-Sleeve 6
40A 13366 Pressure Ring 3
LP600 - # 09197
Item Part # Description Qty.
36 13237 Leakage Seal 3
38 07140 O-Ring 3
38A 13241 Support Ring 3
39 13012 O-Ring 3
39A 13036 Support Ring 3
40 07322 V-Sleeve 3
40A 07268 Pressure Ring 3
40C 05963 Sleeve 3
LP301A-4000 - # 09459-4000
Item Part # Description Qty.
36 13238 Leakage Seal 3
38 07140 O-Ring 3
38A 13241 Support Ring 3
39 12055 O-Ring 3
39A 07693 Support Ring 3
40 06083 V-Sleeve 6
40A 13366-0100 Pressure Ring 3
LP600-4000 - # 09197-4000
Item Part # Description Qty.
36 13237 Leakage Seal 3
38 07140 O-Ring 3
38A 13241 Support Ring 3
39 13012 O-Ring 3
39A 13036 Support Ring 3
40 07322 V-Sleeve 3
40A 07268-0100 Pressure Ring 3
40C 05963 Sleeve 3
Plunger Packing Kits
LP301A/LP301A-4000 - # 09196
Item Part # Description Qty.
44A 07150 O-Ring 6
44B 06266 Support Ring 3
46A 07064 Valve Seat 3
46B 07063 Valve Plate 3
46C 07062-0100 Valve Spring 3
LP600/LP600-4000 - # 09195
Item Part # Description Qty.
44A 07150 O-Ring 6
44B 06266 Support Ring 3
46A 07064-0100 Valve Seat 3
46B 13130 Valve Plate 3
46C 07062-0100 Valve Spring 3
LP301A/LP301A-4000 - # 09196A
Item Part # Description Qty.
44A 07150 O-Ring 9
44B 06266 Support Ring 3
46A 07064 Valve Seat 6
46B 07063 Valve Plate 6
46C 07062-0100 Valve Spring 6
LP600/LP600-4000 - # 09195A
Item Part # Description Qty.
44A 07150 O-Ring 9
44B 06266 Support Ring 3
46A 07064-0100 Valve Seat 6
46B 13130 Valve Plate 6
46C 07062-0100 Valve Spring 6
Valve Kits
Oil Seal Kit - # 09577
Item Part # Description Qty.
31 07133 Oil Seal 3

7
1) Loosen and remove
tension plugs (48) with a
36mm socket wrench.
TO CHECK VALVES
NOTE: Always take time to lubricate all metal and non-metal parts with a light lm of oil before reassembling.
This step will help ensure proper t, at the same time protecting the pump non-metal parts (elastomers) from
cutting and scoring.
44B 44A 45
2) Remove the support ring
(44B), O-ring (44A) and
tension spring (45).
3) Take out discharge valve
assemblies (46) by pulling
them upwards out of the
valve casing (43) with a
snap-ring tongs or any
other pull-off device. Then
remove inlet valves in the
same way.
4) Loosen valve seats (46A)
and valve spring (46C)
from spacer pipe (46D)
by lightly hitting the valve
plate (46B) with a plastic
stick. LP600/LP600-4000
pumps have an addi-
tional valve spring guide
(46E). Check sealing
surface and replace worn
parts. Reassemble with
new O-rings (44A) if pos-
sible and oil them before
installing.
5) Tighten up tension plugs
(48) to 107 ft.-lbs. (145
NM)
46A
46D
46B
46C
REPAIR INSTRUCTIONS
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000

8
6) Loosen the 8 nuts (49A)
with a 19mm socket and
pull off valve casing (43)
to the front.
TO CHECK SEALS AND PLUNGER PIPE
7) Remove the seal sleeve
(35) from the manifold
and /or crankcase.
8) Remove seal case (37)
from seal sleeve (35).
9) Check O-rings (39 & 38) and support rings (39A &
38A) on seal case (37).
39 39A 37 38A 38
10) Remove leakage seal
(36) from the seal sleeve.
If worn or damaged re-
place with new seal.
11) Remove the pressure ring (40A), v-sleeves (40),
sleeve (40C in LP600 only), and support ring (40B),
from the seal sleeve. For LP301A and LP301A-4000
pumps, remove the pressure spring (41). Examine seals
carefully and replace if worn. Clean surfaces of seal
sleeves (35) which come in contact with the crank-
case (1) and sealing surfaces of valve casing (43).
35 40A 40 40 40B
(40C in LP600)
REPAIR INSTRUCTIONS
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000
NOTE: Always take time to lubricate all metal and non-metal parts with a light lm of oil before reassembling.
This step will help ensure proper t, at the same time protecting the pump non-metal parts (elastomers) from
cutting and scoring.

9
12) Check plunger surface (29B). If plunger pipe is worn out,
loosen tension screws (29C) with a 15mm socket and
pull off plunger pipe to the front. Clean front surface of
plunger (29B) thoroughly. Apply a small drop of locktite
to tension screw. Put a new crush washer (29D) onto
tension screw. Put a thin coat of glue (Loctite) on the ring
(or ceramic plunger side) and tighten screw to 265 in.-lbs.
(30 NM).
29B 29D 29C
13) Replace complete seal
sleeve (35)/seal case (37)
assembly into crankcase
(1). Make sure that the
weep hole points down-
ward. Note: To replace
the oil seals (31), you
will need to disassemble
the gear end (see in-
structions below).
Weep Hole
14) Place entire manifold/seal
sleeve assembly over the
studs and push rmly until
seated against the crank-
case.
15) Tighten hex nuts (49A) in a
crosswise pattern (shown
above) to 59 ft.-lbs. (80
Nm).
64 2 7
8135
REPAIR INSTRUCTIONS
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000

10
TO DISMANTLE GEAR END
After removing valve casing (43) and plunger pipe (29B), drain the oil. Remove the gear cover (4) and both
bearing covers (14). Loosen connecting rod screws (24A) and push the front of the connecting rod (24)
forward as far as possible into the crosshead guide.
IMPORTANT! Connecting rods (24) are marked for identication. Do not twist connecting rod halves. Con-
necting rod is to be reinstalled in the same position on shaft journals.
Turning the crankshaft (22) slightly, hit it out carefully to the side with a rubber hammer.
IMPORTANT! Do not bend the connecting rod (24) shanks. Check crankshaft (22) and connecting rod (24)
surfaces, radial shaft seals (15) and taper roller bearings (20).
To remove the oil seals (31) use a wooden rod and sharply hit down on the oil seals from the crankcase (1).
Note: when replacing the oil seals, apply a small amount of locktight to the outside edges of each oil seal
before re-inserting them into the crankcase.
To Reassemble
Using a soft tool, press in the outer bearing ring until the outer edge lines up with the outer edge of the bear-
ing hole. Remove bearing cover (14) together with radial shaft seal (15) and o-ring (16). Fit crankshaft (22)
through bearing hole on the opposite side. Press in outer bearing and tighten it inwards with the bearing
cover, keeping the crankshaft in vertical position and turning slowly so that the taper rollers of the bearings
touch the edge of the outer bearing ring. Adjust axial bearing clearance to at least 0.1mm and maximum
0.15mm by placing tting discs (20A and 20B) under the bearing cover.
IMPORTANT! After assembly has been completed, the crankshaft should turn easily with very little clear-
ance. Tighten connecting rod screws (24A) to 22 ft.-lbs. (30 Nm) Re-assemble the uid end (see instruc-
tions above).
Position Item# Description Torque Amount
1 07759 Crankcase (Molycoate-Copper Paste on sealing area -
seal sleeves)
6 05943 Oil Sight Glass w/Gasket (Loctite 572) 29 ft.-lbs. (40 Nm)
10 01010/01010-0100 Cylinder Screw 221 in.-lbs. (25 Nm)
12 07109 Plug, 1/2” BSP 29 ft.-lbs. (40 Nm)
17 07114/07114-0100 Hexagon Screw 221 in.-lbs. (25 Nm)
24A 13277 Inner Hex Screw, Connecting Rod 22 ft.-lbs. (30 Nm)
29C 13031 (LP600) Tension Screw, Plunger (Loctite 243) 22 ft.-lbs. (30 Nm)
29C 13031 (LP301A) Tension Screw, Plunger (Loctite 243) 26 ft.-lbs. (35 Nm)
29D 07755 Copper Ring (Loctite 577 on both sides)
29D 07161-0100 Crush Washer (Loctite 577 on both sides)
31 07133 Oil Seal (Loctite 403)
48 06077 Plug, Discharge (Pro Pack 550) 107 ft.-lbs. (145 Nm)
49 07140 Stud Bolt (Small amtount on crackcase side Loctite 270)
49A 07158 Hexagon Nut, Stud Bolts 59 ft.-lbs. (80 Nm)
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000
TORQUE SPECIFICATIONS
Pump Mounting Selection Guide
Bushings
06496 - 35 mm H Bushing
Pulley & Sheaves
07165 - 12.75” Cast Iron - 4 gr.
AB Section
Rails
07357 - Plated Steel Channel Rails
(L=11.75”x W=1.88”x H=3.00”)
REPAIR INSTRUCTIONS
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000

11
Pump System Malfunction
Preventative Maintenance Check List & Recommended Spare Parts List
Check Daily Weekly 50 hrs
Every
500 hrs
Every 1500 hrs Every 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 01154 X X
Oil Seal Kit (1 kit/pump)
(see page 6 for kit list)
X
Seal Spare Parts (1 kit/pump)
(see page 6 for kit list)
X
Valve Spare Parts (1 kit/pump)
(see page 6 for kit list)
X
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, Rell 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
Pressure Drop at Gun Restricted discharge plumbing Re-size discharge plumbing to
ow rate of pump
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

GIANT INDUSTRIES, INC., 900 N. Westwood Ave., Toledo, Ohio 43607
PHONE [phone], FAX [phone], www.giantpumps.com
 Copyright 2018 Giant Industries, Inc.
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 car wash applications, the discharge mani
folds 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 applica
tions, are warranted for ve 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 manufac-
turer’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 modications made by the customer or third party.
6. The operation of pumps and or accessories exceeding the specications 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 work-
manship 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 war-
ranty consideration. Call (419)-531-4600 or fax [phone] 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 WAR-
RANTIES OR MERCHANTABILITY OR FITNESS FORA PARTICULAR PURPOSE ANDALL SUCH
WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED BY THE MANUFACTURER.
07/18 LP301A-LP600-4000.indd
Dimensions (mm) -
LP301A/LP301A-SSP/LP301A-4000/LP600/LP600-4000