PRESSURE WASHER TROUBLE SHOOTER
       Tech Tips and Troubleshooting
 

       Listed below is the problem you selected with causes, solutions and discussion

CRANKCASE SEALS / O-RINGS  DAMAGED

Check o-rings and seals. 

Replace if necessary

The crankshaft of most pumps turns on two bearings, one on either side of the pump.  They are held in place with a plates or housings.  

One housing is blank and the other has a hole in it for the crankshaft to extend as a shaft for the motor or engine.

On the blank side there is only one place for the oil to leak,  That's the o-ring that seals the bearing housing to the crankcase housing. 

On the crankshaft side there are two places for oil to leak, one in housing seal to the crankcase. The other is the oil seal that the crankshaft runs through.  

If the pump has never been taken apart before then it's not likely that the housing o-rings on either side of the pump are leaking.  There is no wear on these o-rings.  

The likely culprit is the oil seal on the crankshaft.  This is where the wear takes place.  It's quite easy to replace this seal but it does have to be done from the inside of the crankcase so the crankshaft has to be pulled out of the pump. 

There are 3 other places for oil to leak from the crankcase.  Check the drain plug on the bottom of the pump and make sure it is tight. Check the oring on the plug.  

Some pumps have an oil sight gauge window.  These usually screw into the side of the pump.  Check that it is tight.  There may be an o-ring so check that too.  

The oil fill cap on top of the pump has a small hole in it to allow crankcase air to expand and contract as the pump heats and cools.  If there is too much oil in the pump the oil will splash out the oil filler cap.  Most pumps need to be filled halfway with oil.

The dipstick, which is usually the filler cap as well,  will show the right level for the oil. 

For a typical pump cut-a-way view check this out.  

Make sure you replace the pump oil with your pump manufacturers recommended oil.  Usually non-detergent 30 weight oil

 SOME OF THESE OPERATIONS CAN BE EXTREMELY DANGEROUS.  IF YOU DO NOT HAVE SUFFICIENT TRAINING IN THESE PROCEDURES, WE RECOMMEND YOU SEEK ASSISTANCE FROM A 
QUALIFIED TECHNICIAN



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