What kind of oil goes in the pump of a power boss pressure washer

I use the SAE30 Non-detergent Mineral Pump oil as it is formulated for the high pressure pump.

What you have is a generic pump from china more than likely. Its built along the line of a FAIP pump. They arent supposed to have the oil changed in them at all. Most are sealed pumps but may have a plastic plug in it. If you must replace the oil then I would suggest Pressure washer parts catalog quick links Pressure Washers High Pressure... and get this item 4.5 OZ. AR64545 OIL FOR AXIAL PUMPS. It is recommended for pumps built similarly but not for your specific pump. But it should work. Good luck. W

Northstar suggests a Non-Detergent SAE 30W for that peticular CAT pump.

Hydraulic oil?
Is this a pressure washer?
Pump should be half full of SAE20 or SAE30 non-detergent motor oil.
Engine should have 10W30 motor oil.

If you have a pressure washer ... and not water is coming out end of gun:
Take all hoses off machine.
Look at incoming water hose connection.
The should be a filter washer.
Clean or replace filter washer.
Hook up water and turn on water.
Water should come out other side of pump.
Turn on power washer and see if water coming out of pump is pressurized.
Now hook up pressure hose without gun.
Turn on pressure washer and see if water comes out of hose and is pressurized.
Finally, the gun may be bad.
We used to replace guns when they went bad.

The pump requires no maintenance and no oil change. It is lubricated for life.

Power washer needs oil 2 places.



The pump head has a plastic window on side of pump. Oil should fill to middle of that window. Pump should have 20 or 30 weight NON detergent oil. SAE20 SAE 30 I believe. Auto parts store will know which is NON detergent.

The engine oil is ordinary 10W30. We used to change oil after each painting season by tilting engine to the side. Do not turn engine on it's side or upside down or oil will run into carburetor.

I don't remember exactly how many quarts we put back. Maybe 2? Fill up reservoir until oil is about half-way up dip stick.

You should use what the pump manufacturer recommends. Typically a 30wt non-detergent (non foaming) oil. Do not over fill. If there is a sight glass half way is normal. Or if it has a dip stick follow the mark there.
Here is a great link for pressure washer parts and info
This link goes right to oil page:
http://pressure-washer-parts.com/shopdisplayproducts.asp?Search=Yes

What fluid and how much is required in the Troy-Bilt 2550 power washer pump?

Cat pumps make their own oil. You can purchase it at most Carquest parts stores. If the Honda is gas, 30w motor oil