Triplex Ceramic Plunger Pump Operating Instructions/ Repair and Service Manual Models LP350, LP400, LP450 Updated 2/02 Contents: Installation Instructions: Pump Specifications: Exploded View: Parts List/Kits/Torque Specs: Trouble Shooting Chart: Spare Parts List: Repair Instructions: Dimensions: Warranty Information: page 2 pages 3-5 page 6 page 7 page 8 page 8 page 9-11 back page 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. 4. Use of a dampener is necessary to minimize pulsation at drive elements, plumbing, connections, and other system areas.
Specifications Model LP350 Volume ................................................................................................... Up to 22.6 GPM Discharge Pressure ................................................................................. 2350 PSI Inlet Pressure .......................................................................................... Up to 90 PSI Maximum Crankshaft Speed ................................................................... Up to 1000 RPM Plunger Diameter .........
Specifications Model LP400 Volume ................................................................................................... Up to 15.1 GPM Discharge Pressure ................................................................................. 3600 PSI Inlet Pressure .......................................................................................... Up to 90 PSI Maximum Crankshaft Speed ................................................................... Up to 1000 RPM Plunger Diameter .........
Specifications Model LP450 Volume ................................................................................................... Up to 19.7 GPM Discharge Pressure ................................................................................. 2600 PSI Inlet Pressure .......................................................................................... Up to 90 PSI Maximum Crankshaft Speed ................................................................... Up to 1000 RPM Plunger Diameter .........
LP350, LP400, LP450 - EXPLODED VIEW 6
LP350, LP400 & LP450 PARTS LIST 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 28 29A 29B 29B 29B 29C 29D 30 31 35 PART # 07759 13000 06085 07104 07186 06086 01009 01010 01011 07109 07182 07111 07112 07113 07114 07116 07117 13001 07118 13242 13243 13340 13277 13278 13244 13232 07256 13046 13005 07261 13007 07258 07779 07133 13392 DESCRIPTION Crankcase Oil filler plug assy.
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
REPAIR INSTRUCTION - LP350, LP400, LP450 TO CHECK VALVES 1) With a 30mm wrench remove the three (3) tension plugs (48) from top of valve casing (43). 46D 46C 2) Remove discharge and inlet valve assemblies (46) by pulling them upwards out of the valve casing (43). It maybe necessary to use a slide hammer tool. 46B 46A 3) With the valve assembly (46) pointed down, place a dowel rod through the top of spacer pipe (46D).
REPAIR INSTRUCTION - LP350, LP400, LP450 9) Remove seal case (37) from seal sleeve (35). 35 39 40 (2) 41 10) Check plunger surface (25 and 29B) for wear and pitting. If none is found, proceed to step twelve. 42 38 38A 37 11) If plunger (29B) is worn, remove tension screw (29C) with a 17mm wrench. Clean tension screw with wire brush to remove any old locktite. Discard copper gasket (29D) and replace with new. Clean the front surface of plunger/ crosshead assembly (25).
REPAIR INSTRUCTIONS - LP350, LP400, LP450 DISASSEMBLY OF CRANKCASE 1) Remove valve casing (43) and plunger pipe (29B), drain oil. 2) Screw off gear cover (4) and bearing cover (14). 3) Remove connecting rod screws (24) and push the front of connecting rod forward as far as possible. Remove back halves of connecting rods, note which position from which they came from. 4) Turning the crankshaft slightly, carefully hit on side of crankshaft (22) with a rubber mallet until crankshaft is loose.
LP350, LP400 & LP450 DIMENSIONS (inches) 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 manifolds will never fail, period. If they ever fail, we will replace them free of charge.
