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Table of contents for the manual
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Page 1
Models LP122A/LP122A-4000/LP123/LP255 Triplex Ceramic Plunger Pump Operating Instructions/ Repair and Service Manual 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: p[...]
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Page 2
2 NOTE: Contact Giant Industries for Service School Information. Phone: (419)-531-4600 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 [...]
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Page 3
3 Specifications Models LP122A/LP122A-4000/LP123 *Pump speeds of 640 RPM and above require a minimum inlet pressure of 12 psig. **Pump speeds of 805 RPM and above require a minimum inlet pressure of 14 psig. U.S. ..................................... (Metric) V olume (Continuous) ........................................... 35.4 GPM ................[...]
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Page 4
4 Exploded View - LP122A/LP122A-4000/LP123/LP255[...]
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Page 5
5 ITEM PART NO. DESCRIPTION QTY. 1 07759 Crankcase 1 2 13000 Oil Filler Plug 1 4 06085 Crankcase Cover 1 5 07104 O-Ring 1 6 07186 Oil Sight Glass W/Gasket 1 8 06086 Oil Dipstick 1 9 01009 O-Ring 1 1 0 01010 Screw, (A, B, C, E) 4 1 1 01011-0400 Spring Washer, (A, B, C) 5 1 2 07109 Oil Drain Plug 1 1 3 07182 Gasket 1 1 4 07111 Bearing Cover 2 1 5 071[...]
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Page 6
6 Specifications Model LP255 U.S. ..................................... (Metric) V olume ................................................................. 26.0 GPM ............................ (98 l/min) Discharge Pressure ............................................. 2175 PSI .............................. 150 Bar) Inlet Pressure .................[...]
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7 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 Repai[...]
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Page 8
8 LP122A/LP122A-4000/LP123/LP255 - Repair Instructions 1 . With a 30mm wrench, re- move the six (6) plugs (48) from the valve cas- ing (43). Inspect the o- rings (48A) and replace if necessary. Remove the complete valve assembly (46A) by threading a 12mm bolt into the spring retainer and pulling straight out. 2 . To disassemble the valve, screw the[...]
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Page 9
9 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 th[...]
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Page 10
10 13. Replace plug with o-ring (48, & 48A) and tighten to 160 ft.-lbs. 12. Next, place valve assemblies (46A) into manifold after first lubricating the o-ring (44A). Seat firmly into manifold. 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 wi[...]
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11 LP122A/LP123/LP255 Dimensions (mm) LP122A-4000 Dimensions (mm)[...]
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Page 12
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 cha[...]