Just started using my pressure washer again and i noticed oil leaking out of the oil vent cap on top of the pump. Everything is working fine, good pressure, no noises. I did notice that the thermal relied valve on the bottom of the pump is completely clogged. could that cause the pump to build up excess pressure and leak oil out of the vent cap?
SOURCE: karcher pressure washer leaking oil
all 4 stroke engines have oil, and 2 stroke can have a oil mixer reservoir to mix with engine gas or to lube the chains , gears, pumps.
If yours is 4 stroke as likely then the oil may be leaking at the seals to the main. (bad news)
Pressure wash it (lol) and locate the leak,
to speed up the leak you can pump some compressed air into the engine (be creative)
SOURCE: My Troy Bilt power washer (using Honda GCV160
I had a similar problem. Turns out I had left the hose disconnected and some sort of wasp built a paper type nest inside the washer tube that the hose connects to. I had to take the pump off and take apart and then cleaned it out with a screw driver. Not too easy to do but finally got it clean. Same thing happened with the hose.
So, if you haven't used it for awhile, check that there is no blockage in the hose or pump tubes. You might be able to blow it out with an air compressor.
SOURCE: Oil leaking from pump
top is a breather you may be overfull of oil most pumps you can use engine oil .drain and put in half litre or if it has a sight glass top up to low side of glass and try it out.possible your seals on way out this usually then leaks at front or gets water in.if you still have good pressure oil seals easy to do.
SOURCE: Can't fine where to put pump oil in
Dear glenoaks06,
I handled various Karcher washers, but the 2500 I never came across it. Just the same I will give you a few hints and maybe the solution for the problem. When the oil is milkey this means it has water in it. This means that there are faulty seals for sure. Now in many Power Washers the compartment where the oil is located is filled with oil prior to assembling the head unit that contains the pistons. So you have to take apart the the complete head change all seals( HP seals, LP seals and OIL seals). There are pumps that take multi-grade oil(15/50) and others 90 grade oil. If your pump is fan cooled, it probably takes 15/50 oil. Now one of the main biggest problem of water in oil is Faulty and Scratched PISTONS.
So when you have the pump apart....check condition of pistons. It is useless to change seals if pistons are damaged.
Now one thing regarding your problem, is that you have to put together the head with the pump upside down, so that you can fill the compartment (where the pistons are pushed by the swash plate), with OIL, before you put back the complete head with good pistons,springs,seals, valves...etc..etc. These few hints are relevant to quite a number of Karcher washers.
Regards,
Fulltech.
SOURCE: I have been using a KB3030B electric pressure
The pump has a section with pistons that must have oil. The oil/piston housing is between the motor and the water portion of the pump. Some seals, somewhere are leaking. If you run it without oil it will destroy itself. You must get it fixed and I would do so before using it again.
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