Use exactly what the manufacture recommends. They are all different so you need to contact the manufacture of the pump.
According to my Craftsmans manual for a 3000 psi under "changing pump oil", it says use only high quality SAE 30 weight oil and use no special additives.
If you mean in the engine crank, maybe, but it's a bit thick. In the pump section you should only use the oil recommended by manufacturer or light air -tool oil.
Honda K2400HH pressure washer pump how much oil do you need to put back in
A Karcher pressure washer pump requires 15W40 non-detergent oil. It takes 4 ounces and doesn't need to be changed because the oil will last the for the lifetime of the pump.
It really depends on the machine you have. Pumps will vary according to the pressure you want on your machine, and the size of the engine. Now if you are looking to improve your pump, you can go to the related link below, where they have plenty of different pumps to choose from.
Nothing!
Nothing!
How much pump oil goes into a Troy Bilt Pressure washer Model 020242
5 oz
Yes, but not very well. The small pump within a pressure washer is designed to PUSH water, not pull it- and the rate of flow is very small. It would pump a long time to move a major amount of water. The pump will also not handle dirty water very well.
If it has no pressure your problem should be on the pump. The three things I'd recommend you to check are: Packings, Unloader and Valve Kit.
typically a washer pump breaks. Replace it. How to replace a washer pump?
Remove the wiring harness from the washer pump. Remove the washer pump hose. Remove the washer pump retaining screws. Reverse the process to install the new windshield washer pump.