How to remove a Direct Drive Pump in a Pressure Washer   Leave a comment

Direct Drive Pressure Washer  Pump Removal
The following steps will assist you in removing your pump from your gas
engine or electric motor on your pressure washer.
1. To start the process, spray a few drops of penetrating oil onto the top groove
or two small rectangular slots on the sides of the pump flange.
2. Remove the mounting bolts and washers securing the pump to the drive.
3. Loosen set screw.
4. Insert a flat head screwdriver into the two opposing slots on the mounting
flange and pry pump from gas engine or electric motor. Apply only reasonable
pressure. Do not force separation.
5. If pump resists the separation, insert two full threaded screws into the two
special holes in the pump mounting flange. Thread in deep enough to make
contact with the gas adapter plate or electric motor face. Then continue to thread
in the bolts in an alternating pattern to separate the pump from the drive. Apply
only reasonable torque. Do not force separation.
6. A strong bond may develop in any direct drive installation and may increase
with heavy duty operation and time. It may be necessary to repeat one or more of
these steps.
To ease the stress of future repairs, make a habit of removing the pump and
applying anti-seize lubricant on a semiannual basis. With the heat that is
generated in the crankshaft area, anti-seize won’t last forever.

With the pump removed, apply a moderate layer of anti-seize lubricant to the
pump’s crankshaft and a small bead of high-heat caulk around the middle of the
motor or engine’s crankshaft to seal out any moisture to the coupling.
To purchase Anti-Seize Lubricant, see:
The procedure: Loosen the four flange bolts equally so that two threads are
exposed. Start the motor and the centrifugal force of the spinning motor should
cause the pump to move outward toward the bolt heads. You may have to help
the pump by pulling on it while the motor is running. Once the pump has moved
to the bolt heads, stop the motor and loosen the bolts so that another two threads
are exposed.
Once the pump has moved, say 3/8”, remove the flange bolts completely and
start to pull the pump off the crankshaft. You may still have to pry the pump off,
but it will be much easier. And the best part is, no broken parts to clean up!

ETS Co. Inc.

Pdf can be found here:


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