How to Repair a Leaking Manifold on a Husky Pressure Washer

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Husky power washers are outdoor tools designed to clean large, hard surfaces with a forceful blast of water. Typical cleaning surfaces include patios, decks, sidewalks, driveways, home exteriors and even cars and bicycles. While regular cleaning and maintenance should help keep the Husky washer working correctly, problems with leaking may occur occasionally. If the manifold is leaking, some repair efforts may restore function without having to replace the manifold.

Things You'll Need

  • Adjustable wrench
  • Clean cloths
  • Pliers
  • Straight edge
  • Turn off the Husky power washer and allow the unit to cool in a room temperature setting such as a garage, leaving a garden hose attached. The hot water purge from the pressure washer when water sits in the tank may mimic the signs of a leaking manifold. Restore power once the unit is fully cool and press the handle trigger. If the leak does not occur, no further troubleshooting is needed.

  • Continue troubleshooting if the manifold continues to leak once the power washer has cooled. Reduce the inlet pressure by removing the pressure adjustment screw cap and turning the pressure inlet screw counterclockwise.

  • Turn off and disconnect the power washer if the manifold continues to leak. Disconnect the power washer wand and remove the pin from the manifold, which is the connection point between the pipe fitting and the check valves on the assembly.

  • Check the manifold suction valve for obstructions or debris that may be creating the leak. Clean as necessary and reassemble the unit.

  • Restart the power washer and monitor the pressure on the washer pressure gauge, which should be less than 8.5 pounds per square inch (psi).

  • Shut down the power washer again if the pressure is too high or the manifold continues to leak water or oil. Disconnect the manifold and replace any worn water or oil seals.

  • Tighten the fittings between the manifold and the power washer assembly using a pair of pliers.

  • Inspect the plungers on the manifold and replace them with new plungers if the current ones seem scored or damaged. Ensure the plungers are not running sideways and correct any components that may be placing stress on the plungers.

  • Look at the spacer rings if the leak is oil-based. Use a straight edge to see if the seals are unmasked or uneven. Replace the spacer rings if necessary.

Tips & Warnings

  • Replacement parts can be purchased through Husky or in many garden or home repair stores.
  • Look at the oil monitor sight glass on the power washer and empty out a small amount of oil if the sight glass is too full or there are traces of oil on top of the washer. Open the oil valve and drain some of the oil into an empty collection pan, then replace the oil valve.
  • Do not attempt this repair if you're not confident that you can do so safely and effectively. Contact Husky or another qualified service professional instead for inspection or repair if troubleshooting efforts fail to resolve the leak.

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