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Triplex Ceramic
Plunger Pump
P400 Series -
Operating Instructions/
Repair and Service Manual
22 and 25mm Versions
For Models:
P420
P420-0011
P420-0021
P422
P423
P425
Contents:
Installation Instructions: page 2
Pump Specifications (except P425): pages 3-5
Exploded View: page 6
Parts List/Kits: page 7
Pump Specifications (P425): page 8
Repair Instructions/Torque Specs.: pages 9-10
Trouble Shooting Chart: page 11
Recommended Spare Parts List: page 11
Dimensions: back page
Warranty Information: back
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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 complicated procedure, but there are some basic pulsation at drive elements, plumbing, connections, steps common to all pumps. The following informa- and other system areas. The use of a dampener with tion is to be considered as a general outline for Giant Industries, Inc. pumps is optional, although installation. If you have unique requirements, please recommende
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Specifications ModelS P420A, P420A-0011, P420A-0021 U.S. (Metric) Volume ................................................................ Up to 12.9 GPM ................. (48.8 LPM) Discharge Pressure .............................................. Up to 2175 PSI ................... (150 bar) Inlet Pressure....................................................... -4.35 to 145 PSI .................. (-.3 to 10 bar) Stroke .................................................................. 0.945” ....
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Specifications Model P422 U.S. (Metric) Volume ................................................................ Up to 10.7 GPM ................. (37.7 LPM) Discharge Pressure Continuous .......................... Up to 2600 PSI ................... (180 bar) Discharge Pressure Intermittent .......................... Up to 3000 PSI ................... (206.8 bar) Inlet Pressure....................................................... -4.35 to 145 PSI .................. (-.3 to 10 bar) Stroke .......
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Specifications Model P423 U.S. (Metric) Volume ................................................................ Up to 8.3 GPM ................... (31.4 LPM) Discharge Pressure .............................................. Up to 2900 PSI ................... (200 bar) Inlet Pressure....................................................... -4.35 to 145 PSI .................. (-.3 to 10 bar) Stroke .................................................................. 0.79” ..............................
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EXPLODED VIEW - P420/P420-0011/P420-0021/ P422/ P423 AND P425 PUMPS 6
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P420/P420-0011/P420-0021/P422/P423 and P425 SPARE PARTS LIST A = P420 B=P422 G=P423 H=P425 J=P420-0011 K=P420-0021 ITEM PART DESCRIPTION QTY. ITEM PART DESCRIPTION QTY. 1 08377 Crankcase 1 16H 06431 Oil Scraper 3 2 08378 Oil Fill Plug with Gasket 1 17 06790 Crosshead Pin 3 3 06479 Crankcase cover 1 19 08366 Oil Seal 3 3A 07186 Oil Sight Glass w/ Gasket 1 20 06771 Seal Case (A, H, J & K) 3 4 08380 O-Ring 1 20 06770 Seal Case (B and G) 3 5 07109 Oil Drain Plug 1 20A 06772 Gear Seal Adapter 3
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Specifications Model P425 U.S. (Metric) Volume ................................................................ Up to 10.7 GPM ................. (40.6 LPM) Discharge Pressure .............................................. Up to 2465 PSI ................... (170 bar) Inlet Pressure....................................................... -4.35 to 145 PSI .................. (-.3 to 10 bar) Stroke .................................................................. 0.787” ..............................
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Repair Instructions P420/P420-0011/P420-0021/P422/P423 and P425 Note: Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassembly. This step will ensure proper fit, at the same time protecting the pump nonmetal parts (i.e., the elastomers) from cutting and scoring. 1) With a socket wrench, 3) By inserting a small screw 2) Using needle nose pliers, remove the three discharge driver between the valve seat remove the inlet and dis- valve plugs and three in
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Repair Instructions P420/P420-0011/P420-0021/P422/P423 and P425 IMPORTANT! Care must be taken that glue does not get between the plunger pipe (16B) and centring sleeve (16C). The plunger pipe should not be strained by eccentric tightening of the tension screw or through damage to front surface of plunger, otherwise it is liable to fracture. 9) Check surfaces of plunger 10) If the plunger pipe (16B), or oil seal (19) is worn, remove (16). Damaged surfaces cause accelerated seal wear. tension scre
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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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Dimensions - P420/P420-0011/P420-0021/P422/P423 and P425 - Inches (mm) 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 ap
