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Pressure washer oil (amount)


Wally107's Avatar
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Join Date: Aug 2010
Posts: 123
NY

02-15-12, 10:58 AM   #1  
Pressure washer oil (amount)

Just scored a Craftsman 2100PSI 5.0hp pressure washer on CL (model: 580.767100) for $25. Seller said it ran fine (which it does), but when you release the trigger after spraying, the motor dies. I figured a decent running 5 hp motor was worth $25, so I grabbed it.

From what he's describing, and my exhaustive searching through this wonderful forum, I believe it's time for a new unloader valve (after I check the nozzle & fitting for blockages or leaks). I've never done it before, but it doesn't look terribly difficult...and this is the kind of challenge us DIYer's live for.

One think I can't seem to find: when I'm done, how much oil do I put in the case? From the videos I've seen on YT, it looks like maybe 1/8 qt or so. Is there a "fill line" I should look for?

Thanx! Wally

 
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sidny's Avatar
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02-15-12, 12:07 PM   #2  
The washer

It's possible that the unloader [pressure relief] valve is repaireable or cleanable, It's just a spring, valve & seat, and a threaded adjustment screw. I would also check the throttle linkage for free travel and both fuel adjustment screws, and
maybe put a little gumout in the gas tank, nothing to loose.
Sid

 
sidny's Avatar
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02-15-12, 02:34 PM   #3  
The washer

I forgot about the oil question. If the pump has a sight glass, with the engine off, and the machine almost perfictly level, theoil level ehould be at the enter of the glass or if there is a line on the glass up to the line.
Sid

 
Wally107's Avatar
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Join Date: Aug 2010
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02-16-12, 08:34 AM   #4  
Thanx Sid!

I thought about just cleaning the valve, but it seems they go bad pretty often, and for $18 (locally)...I figured it's worth replacing. As far as the engine...it appears to be working perfect (including the throttle linkage).

You mentioned a "threaded adjustment screw", and I know this valve is sometimes adjustable, but in looking at the pictures of this one (B&S #187879GS)...I don't see any adjustment on it. I just figured this one didn't adjust. I'll try to attch the pics below. Am I missing it?


Valve 187879GS Order now for same day shipping. 365 day return policy. RepairClinic.com

Thanx! Wally

 
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02-16-12, 08:59 AM   #5  
I would suggest running the pump for a few seconds with the unloader removed to blow out any debris that may be blocking the passage from the input side, I lost the screen from the input and a bug or bugs decided to take up residence or were in the garden hose, anyway I ended up with a pump full of bug parts that kept blocking the unloader, so make sure the screen remains in place. Have a good one. Geo

 
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