Re: where can i put lubricating oil for karcher jet wash...
It sounds like you are referring to the oil in the swash plate housing. You can use a multi grade motor oil such as 20w50 or 10w40. Fill to about half way over the swash plate. If the old oil has gone amilky colour, please replace the oil seals first.
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The oil is there to lubricate the pistons as they are pushed by the swash plate. This oil is usually normal multi- grade engine oil. In bigger machines, grade 90 oil is used. If you are not sure, get some multi-grade and 90 oil, and test with your hand. It should be very easy to see the difference. When filling, see that at least the pistons with the springs are getting wet with oil. Important not to overflow the oil. This overflow, might cause pressure and oil will get out of the seals and mix with the water. On the other hand, the seals must be renewed once you opened the oil side. This because water can enter through the seals and mix with the oil.
Your Honda would be a four stroke engine, so your fuel would be straight gas, you will notice on the base of the engine there is a location to put oil, a 4 stroke engine is lubricated by the oil in the base of the crankcase. On a two-stroke engine.oil fuel mixture lubricates the crank so it has no provision to add oil to the engine.
Most pressure washers have ball lock type fittings on the hose connections. What happens is the little steel balls get a bit of corrosion and do not lock the male fitting properly with the female coupling. Load up the fitting with some Oil or WD 40. Then connect and disconnect the fitting several times to losen up the balls and springs. Should the spring in the coupling break you will get the exact symptom your describing.
If the OIL / WD 40 does not do the trick then you may have to change out the quick disconnect coupling.
You need to remove the pump and sit it brass side up before removing the bolts holding the brass to the aluminum part (you have to do it that way so the oil doesn't spill out.) CAUTION: there is some spring tension on the brass head.
Take the brass head off and set to the side on a rag or in a bucket. Dump out whatever oil is in the oil side, making sure not to drop the swash plate or bearing (the pieces sitting in the oil). Fill the oil end with aproximatly 4.5 ounces of Karcher pump oil, (or just 20w 50 weight non-detergent oil). Put the brass head back on and tighten bolts. Put the pump back on the machine.