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HP (Hewlett-Packard) LP400 manual

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Table of contents for the manual

  • Page 1

    Models LP350, LP400, LP450 Triplex Ceramic Plunger Pump Operating Instructions/ Repair and Service Manual Contents: Installation Instructions: page 2 Pump Specifications: pages 3-5 Exploded View: page 6 Parts List/Kits/Torque Specs: page 7 Trouble Shooting Chart: page 8 Spare Parts List: page 8 Repair Instructions: page 9-11 Dimensions: back page W[...]

  • Page 2

    2 INSTALLATION INSTRUCTIONS 4. Use of a dampener is necessary to minimize pulsation at drive elements, plumbing, connec- tions, 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 pulsa- tion. Dampeners can also reduce the severity of pr[...]

  • Page 3

    3 Specifications Model LP350 Volume ................................................................................................... Up to 22.6 GPM Discharge Pressure ................................................................................. 2350 PSI Inlet Pressure ..........................................................................[...]

  • Page 4

    4 Specifications Model LP400 Volume ................................................................................................... Up to 15.1 GPM Discharge Pressure ................................................................................. 3600 PSI Inlet Pressure ..........................................................................[...]

  • Page 5

    5 Specifications Model LP450 Volume ................................................................................................... Up to 19.7 GPM Discharge Pressure ................................................................................. 2600 PSI Inlet Pressure ..........................................................................[...]

  • Page 6

    6 LP350, LP400, LP450 - EXPLODED VIEW[...]

  • Page 7

    7 ITEM # PART # DESCRIPTION QTY 1 07759 Crankcase 1 2 13000 Oil filler plug assy. 1 4 06085 Crankcase Cover 1 5 07104 O-ring, Crankcase cover 1 6 07186 Oil Sightglass with Gasket 1 8 06086 Oil Dipstick 1 9 01009 O-Ring, Dipstick 1 10 01010 Cylinder Screw 4 11 01011 Spring Ring 5 12 07109 Plug 1 13 07182 Gasket 1 14 07111 Bearing Cover 2 15 07112 Ra[...]

  • Page 8

    8 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[...]

  • Page 9

    9 REPAIR INSTRUCTION - LP350, LP400, LP450 T O CHECK V AL VES 4) Inspect valve seats (46A) and valve plates (46B) for damage and replace if needed. Check valve casing (43) surfaces for damage. Replace o-rings (44A) and reinstall valve assemblies (46) into valve casing. (Lubricate o-rings before installation.) 5) Replace tension plugs (48) and tight[...]

  • Page 10

    10 9) Remove seal case (37) from seal sleeve (35). 10) Check plunger surface (25 and 29B) for wear and pit- ting. If none is found, pro- ceed to step twelve. 11) If plunger (29B) is worn, re- move tension screw (29C) with a 17mm wrench. Clean tension screw with wire brush to remove any old locktite. Discard copper gas- ket (29D) and replace with ne[...]

  • Page 11

    11 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 cran[...]

  • 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 car wash applications, the discharge manifolds will never fail, period. If they ever fail, we will replace them free of charge. Our othe[...]