General Pump Pressure Washer System Installation, Operation & Service Manual
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General Pump Pressure Washer System Installation, Operation & Service Manual

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P P r r e e s s s s u u r r e e W W a a s s h h e e r r S S y y s s t t e e m m
INSTALLATION
OPERATION
SERVICE
MANUAL
Introduction ..........................................................2
Typical Operation & Requirements .......................2
Pressure .........................................................2
Flow................................................................2
Designing Your System ...................................3 - 5
Pump Selection ..............................................3
Motor/Engine Selection ..................................3
Determining Spray Tip Size............................5
Drive System ...................................................5 - 6
Pulley Selection..............................................5
Belt Selection .................................................6

TABLE OF CONTENTS

Installing Your Components . . . . . . . . . . . 7 - 8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 9
Servicing Your Pump. . . . . . . . . . . . . . . 10 - 11
Components . . . . . . . . . . . . . . . . . . . 6
Components . . . . . . . . . . . . . . . . 6 - 7
Valve Assemblies. . . . . . . . . . . . . . . . . . 10
Removing Manifold Head . . . . . . . . . . . 10
Replacing Plungers . . . . . . . . . . . . . . . . 11
Replacing Packings . . . . . . . . . . . . . . . . 11

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Summary of Contents for General Pump Pressure Washer System

  • Page 1: Table Of Contents

    P P r r e e s s s s u u r r e e W W a a s s h h e e r r S S y y s s t t e e m m INSTALLATION OPERATION SERVICE...

  • Page 2: Introduction

    GENERAL PUMP positive As a safety device, at least one pressure relief valve should displacement pumps.

  • Page 3: Designing Your System

    PUMP SELECTION The size of the electric motor or gas engine required to The heart of any pressure washer system is the high drive your pump is determined by the pump GPM and pressure pump. Size the pump according to your clean- PSI output desired.
  • Page 4 ELECTRIC MOTOR HORSEPOWER REQUIRED TO DRIVE A PUMP 100 PSI 200 PSI 250 PSI 300 PSI 400 PSI 500 PSI 700 PSI 1000 PSI 1250 PSI 1500 PSI 2000 PSI 2500 PSI 3000 PSI 4000 PSI 1.10 1.40 1.05 1.40 1.76 1.92 2.80...

  • Page 5: Determining Spray Tip Size

    DETERMINING SPRAY TIP SIZE PULLEY SELECTION As stated earlier in this manual, the output pressure is There are many types of belts and pulleys available, determined by forcing the output volume of water the following is a basic guide. Manufacturer’s through a certain size orifice or spray tip.

  • Page 6: Belt Selection

    SELECTING REMAINING COMPONENTS If your motor/engine will be operated at a speed other than 1725 RPM, the pump pulley diameter can be calculated using the following formula: UPSTREAM OR INLET SIDE COMPONENTS Motor Pump Pulley Pulley Inlet Filter - A very important component to increase Ration Diameter Diameter...

  • Page 7: Installing Your Components

    HOSE FRICTION LOSS servicing unloader valves. The valve should be mounted PRESSURE DROP IN PSI PER 100 FT OF HOSE as close to the pump outlet as possible; do not use any WATER WITH TYPICAL WATER FLOW RATES FLOW hose between the pump and the unloader. (HOSE INSIDE DIAMETERS, INCHES) GAL/MIN 5/16...
  • Page 8 Do not introduce acids or other caustic materials or any abrasive into your pressure washer system or warranties Mount the motor/engine in relationship to the pump will be void and components in the system will be such that when running, the rotation of the pump damaged.

  • Page 9: Troubleshooting

    May be caused by humid air condensing i Change oil intervals. Use General Pump SAE 30 nto water inside the crankcase non-detergent oil. Water in crankcase. Worn packing and/or piston rod sleeve, Replace packing.

  • Page 10: Servicing Your Pump

    SERVICING YOUR PUMP VALVE ASSEMBLIES (Figure 1) 1. All inlet and discharge valves can be serviced without disrupting inlet discharge plumbing. inlet discharge valves are identical in all models. 2. To service any valve, remove valve cap and extract valve assembly. 3.

  • Page 11: Replacing Plungers

    REPLACING PLUNGERS (Figure 3, 5 & 6) 1. Remove stainless steel piston screw plunger from piston rod. 2. If slinger washer comes off with plunger, be certain this is replaced before new plunger is installed. 3. Separate piston screw from plunger. 4.

  • Page 12: Replacing Packings

    Ring Retainer Seal General Pump is a member of the Interpump Group G G E E N N E E R R A A L L P P U U M M P P 1174 Northland Drive • Mendota Heights, MN 55120...

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