How to Repair a Leaking Manifold on a Husky Pressure Washer

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.