Triplex Ceramic Plunger Pump Operating Instructions/ Repair and Service Manual Models LP122A/LP122A-4000/LP123/LP255 Updated 12/06 Contents: Installation Instructions: Pump Specifications - LP122A/LP122A-4000 Pump Specifications - LP123: Exploded View: Parts List/Kits: Pump Specifications - LP255: Trobleshooting Guide: Suggested Maintenance Schedule: Repair Instructions/Torque Specs.
INSTALLATION INSTRUCTIONS 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 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. Installation of the Giant Industries, Inc.
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 ...........
Exploded View - LP122A/LP122A-4000/LP123/LP255 4
LP122A/LP122A-4000/LP123/LP255 PARTS LIST A = LP122A ITEM 1 2 4 5 6 8 9 10 11 12 13 14 15 16 17 20 20A 20B 21 22 23 24 24A 24B 25 PARTNO.
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 ....................................................................
PUMP SYSTEM MALFUNCTION MALFUNCTION CAUSE REMEDY The Pressure and/ or the Delivery Drops Worn packing seals Broken valve spring Belt slippage Worn or Damaged nozzle Fouled discharge valve Fouled inlet strainer Worn or Damaged hose Worn or Plugged relief valve on pump Cavitation pump for restrictions Unloader Replace packing seals Replace spring Tighten or Replace belt Replace nozzle Clean valve assembly Clean strainer Repair/Replace hose Clean, Reset, and Replace worn parts Check suction lines on inlet
LP122A/LP122A-4000/LP123/LP255 - Repair Instructions 44A 1. With a 30mm wrench, remove the six (6) plugs (48) from the valve casing (43). Inspect the orings (48A) and replace if necessary. Remove the complete valve assembly (46A) by threading a 12mm bolt into the spring retainer and pulling straight out. 44 45 48 47 2. To disassemble the valve, screw the bolt into the retainer until the valve plate (45) presses the valve seat (44) out of the spring retainer.
LP122A/LP122A-4000/LP123/LP255 - Repair Instructions TO REASSEMBLE PROCEED AS FOLLOWS: 29E 7. 36A 8. 36 29A 29B 29D 29C 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.
LP122A/LP122A-4000/LP123/LP255 - Repair Instructions 14. Fill crankcase with approximately 116 fluid ounces of Giant 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 Giant LP pump into your system. 12. Next, place valve assemblies (46A) into manifold after first lubricating the o-ring (44A). Seat firmly into manifold. 13. Replace plug with o-ring (48, & 48A) and tighten to 160 ft.-lbs.
LP122A/LP123/LP255 Dimensions (mm) LP122A-4000 Dimensions (mm) 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.
