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Triplex Ceramic
Plunger Pump
Operating Instructions/
Repair and Service Manual
Models
LP122A/LP122A-4000/LP123/LP255
Contents:
Installation Instructions: page 2
Pump Specifications - LP122A/LP122A-4000 page 3
Pump Specifications - LP123: page 3
Exploded View: page 4
Parts List/Kits: page 5
Pump Specifications - LP255: page 6
Trobleshooting Guide: page 7
Suggested Maintenance Schedule: page 7
Repair Instructions/Torque Specs.: pages 8-10
Dimensions: page 11
Updated 12/06 Warranty Information: ba
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INSTALLATION INSTRUCTIONS Installation of the Giant Industries, Inc., pump is not a 4. Use of a dampener is necessary to minimize pulsation at complicated procedure, but there are some basic steps drive elements, plumbing, connections, and other system common to all pumps. The following information is to areas. The use of a dampener with Giant Industries, Inc. be considered as a general outline for installation. If pumps is optional, although recommended by Giant you have unique requirements
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Specifications Models LP122A/LP122A-4000/LP123 U.S. .....................................(Metric) Volume (Continuous) ........................................... 35.4 GPM ............................ (134 l/m) Volume (Intermittent) ........................................... 40 GPM ............................... (151.4 l/m) Discharge Pressure (Continuous) ........................ 1300 PSI ..............................(90 Bar) Discharge Pressure (Intermittent) .......................2000 PSI...
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Exploded View - LP122A/LP122A-4000/LP123/LP255 4
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LP122A/LP122A-4000/LP123/LP255 PARTS LIST A = LP122A B = LP123 C = LP122-4000 E = LP255 ITEM PART NO. DESCRIPTION QTY. ITEM PART NO. DESCRIPTION QTY. 1 07759 Crankcase 1 35B 13141 O-Ring (E only) 3 2 13000 Oil Filler Plug 1 36 13415 V-Sleeve, Weep (A-C) 3 4 06085 Crankcase Cover 1 36 13025 V-Sleeve, Weep (E) 3 5 07104 O-Ring 1 36A 13416A Pressure Ring, Weep, (A, B, C) 3 6 07186 Oil Sight Glass W/Gasket 1 36A 06700 Pressure Ring (E) 3 8 06086 Oil Dipstick 1 37 06701 Support Disc (E only) 3 9 0100
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Specifications Model LP255 U.S. .....................................(Metric) Volume ................................................................. 26.0 GPM ............................ (98 l/min) Discharge Pressure ............................................. 2175 PSI .............................. 150 Bar) Inlet Pressure ....................................................... Up to 90 PSI .......................Up to 6.2 Bar) Speed ..........................................................
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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 restriction
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LP122A/LP122A-4000/LP123/LP255 - Repair Instructions 44A 44 45 48 47 1. With a 30mm wrench, re- 2. To disassemble the valve, screw the bolt into the retainer move the six (6) plugs until the valve plate (45) presses the valve seat (44) out of (48) from the valve cas- the spring retainer. Examine all parts and replace if neces- ing (43). Inspect the o- sary. If the seat doesn’t come out, use a valve puller to rings (48A) and replace if remove. necessary. Remove the complete valve assembly (46A) b
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LP122A/LP122A-4000/LP123/LP255 - Repair Instructions TO REASSEMBLE PROCEED AS FOLLOWS: 29E 29A 29B 29D 29C 7. If previously disassembled thoroughly clean all exposed surfaces on the spacer (29E) and all exposed threads on the plunger bolt (29C) and the steel plunger base (25). Threads MUST be free of old loc-tite and any other material such as oil, grease, etc. This is necessary to ensure proper curing of new loc-tite. Giant recommends cleaning the threads with acetone or other suitable cleaner.
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LP122A/LP122A-4000/LP123/LP255 - Repair Instructions 14. Fill crankcase with approxi- mately 116 fluid ounces of Gi- ant oil or equivalent SAE 90 industrial gear oil and check oil level of the crankcase with the dipstick. Proper level is center of two lines. Reinstall your Gi- ant LP pump into your system. 12. Next, place valve assemblies 13. Replace plug with o-ring (48, & (46A) into manifold after first 48A) and tighten to 160 ft.-lbs. lubricating the o-ring (44A). Seat firmly into manifold. L
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LP122A/LP123/LP255 Dimensions (mm) LP122A-4000 Dimensions (mm) 11
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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 a
