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How much oil to put in pressure washer pump crankcase?


D.Smith's Avatar
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04-25-16, 02:44 PM   #1  
How much oil to put in pressure washer pump crankcase?

Hi Guys,

I'm rebuilding my old pressure washer. I was able to find a parts kit and what kind of oil to use, but don't know how much oil it needs.

When I opened it, it was full of water

It's a vertical shaft wobble plate pump. (Husky 1750)



Should I fill it up with oil? Or just enough to get oil on the plungers?

Thanks for your help!

 
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04-25-16, 02:52 PM   #2  
If I remember correctly on my Honda w/Comet pump the engine oil fills almost to the top of the plug while the pump has a sight glass that lets you know if there is enough fluid. Some of the others that are more knowledgeable about pressure washers than me will probably want to know what brand it is.


retired painter/contractor avid DIYer

 
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04-25-16, 03:05 PM   #3  
Hey Mark,

It's a Husky 1750 psi electric power washer, 11 years old.

 
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04-25-16, 03:13 PM   #4  
I don't know hardly anything about electric pressure washers, do you know what brand of pump it has? I'd think there would be a tag on it somewhere.


retired painter/contractor avid DIYer

 
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04-25-16, 05:12 PM   #5  
From the manual.....
5.3 LUBRICATION
The pressure washer is designed with a permanent lubrication system. Conventional oil check and oil changes are not necessary.
NOTE: IN CASE OF OIL LEAKAGE, CONTACT THE HD POWERWASHER CUSTOMER SERVICE
DEPARTMENT CONCERNING REPAIR. A SMALL AMOUNT OF OIL LEAKAGE IS NORMAL.

husky power washer/manual/1750english.pdf

I think you may be in trouble if your pump was full of water


~ Pete ~

 
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04-25-16, 05:32 PM   #6  
11 years old! Full of water, Not worth fixing, time for a new one.

 
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04-25-16, 05:44 PM   #7  
Must be the season for pressure washers.
Mine is a POP Karcher that's been nothing but trouble from day one.
Guy up the street has a one that just died.
Another customer has another one just not worth fixing because the pump failed.
This is all within a few days.
I tried to get everyone to pay for a part of the money for a real commercial unit which would be about $200.00 more then a home owners unit.
No takers.
Which is fine.
Going to pay for it's self in three jobs.

 
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04-26-16, 12:33 AM   #8  
Darn, I thought this was a "DIY" forum, not a "thow it away and buy a new one forum"! :NO NO NO:

I'm a retired industrial maintenance mechanic. I'm used to repairing stuff when it breaks.

Water in the crankcase means the bottom seals are worn out. No harm done, simply time for new ones. Rebuild kits are less than $30.

Unfortunately, I'm not very familiar with wobble plate and swash plate pumps. I don't know where the oil level is supposed to be, and was hoping someone here would know.

 
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04-26-16, 03:51 AM   #9  
Listening to this discussion, it seems to me that the "crankcase" is actually a water pressure chamber, and it's supposed to be filled with water when the Washer is in use; drained when stored away.

The Washer is driven by an electric 1750 RPM Motor, right ?

I should have said something yesterday.

 
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04-26-16, 04:37 AM   #10  
You may have to contact Husky to find out how much oil to install.

I just purchased an inexpensive Italian made Innovi pump to replace a Comet pump on a 5 hp Honda and had research why the instructions said to replace a solid oil plug with a vented one included in the small parts bag and there wasn't one.

Turns out the instructions were generic and the pump was sealed and came pre-filled with oil.
I did find out my pump holds 2 ounces of oil but you need to either keep looking or contact Husky to find this out.


GregH.........HVAC/R Tech

 
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