Craftsman 25 gal Air Compressor 3 12 hp Vertical k 2 Stage Oil Free Pump Logo
Posted on Mar 07, 2011

Compresor runs and pumps, but does not pump at any pressure to fill tank. I remove lines to check for obstruction, but all clear. Blows with only minor pressure

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iammark

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  • Posted on Mar 09, 2011
iammark
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YOU MAY HAVE TO REPLACE YOUR REED PLATE AND OR YOUR PISTON AND RING AND CYLINDER.YOU CAN FIND THE PARTS RIGHT AT SEAR WEB SITE

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I haven't heard of any fuel injected car being fitted with such a switch, except the inertia type switch that cuts the power supply to the pump - as you can hear the pump running that won't be your trouble.

A good fuel pump well supplied with fuel and power is capable of enough pressure to burst some fuel hoses if the fuel line is blocked - therefore the system self bleeds and circulates through the pressure regulator and back to the tank through the return line.

When the engine isn't running the pump will run for about four seconds and cut off until the engine cranks. When the fuel line is empty, only a few seconds of cranking is needed to fill and pressurise the system.
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Hello!

REMOVAL

WARNING:
  • DO NOT SMOKE OR CARRY LIGHTED TOBACCO OR OPEN FLAME OF ANY TYPE WHEN WORKING ON OR NEAR ANY FUEL-RELATED COMPONENT. HIGHLY FLAMMABLE MIXTURES ARE ALWAYS PRESENT AND MAY BE IGNITED, RESULTING IN POSSIBLE PERSONAL INJURY.
  • FUEL IN THE FUEL SYSTEM REMAINS UNDER HIGH PRESSURE EVEN WHEN THE ENGINE IS NOT RUNNING. BEFORE REPAIRING OR DISCONNECTING ANY OF THE FUEL LINES OR FUEL SYSTEM COMPONENTS, THE FUEL SYSTEM PRESSURE MUST BE RELIEVED TO PREVENT ACCIDENTAL SPRAYING OF FUEL, CAUSING PERSONAL INJURY OR A FIRE HAZARD.
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  2. Relieve the system pressure.
  3. Raise the vehicle.
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  1. Disconnect the fill pipe hoses.
    • Loosen fill pipe hose clamps.
    • Disconnect fill pipe hoses from the fuel tank.

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  1. Remove the 4 bolts (2 each side) and remove the skid plate if equipped.
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  1. Remove the bolts and pivot the fuel tank support straps away from the fuel tank.

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Disconnect the fuel supply line push-connect fitting and the vapor tube fitting at the fuel pump


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  1. Disconnect the vapor line fitting at the rear of the fuel tank.
  2. Lower the fuel tank.

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To install, reverse the removal procedure


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REMOVAL

  1. Clean the area around the fuel pump mounting flange.



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  1. Using the special tool, remove the fuel tank pump assembly locking retainer ring.
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INSTALLATION
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  1. Using the special tool, tighten the fuel pump assembly locking retainer ring.
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