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#3284125 - 02/16/14 01:51 PM Cleaning compressor sump: What to use?
ron in sc Offline


Registered: 05/31/06
Posts: 71
Loc: SC
I want to clean, this is, remove the sludge form my air compressor pump. It has a large inspection plate that I can remove to access entire sump. I've done it this way before many bolt to remove and then remove old gasket material and make new gasket.

I would like to clean it by adding some cleaner (????) with oil. Then run it and drain contents and refill with oil. What could I safely use that would work.

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#3284161 - 02/16/14 02:16 PM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
95busa Offline


Registered: 10/15/05
Posts: 1012
Loc: Virginia
maybe MMO?
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2005 Ford F250 Super Duty 4x4
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#3284196 - 02/16/14 02:44 PM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
Sawdusted Offline


Registered: 12/25/12
Posts: 345
Loc: Lone Star, USA
I would spray with brake parts cleaner after you remove the plate. If your bottom plate has waffle patterns, it'll be more difficult to remove the wear metals but it can be done.

Spray with compressed air to remove parts cleaner and then refill with whatever suitable oil.
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#3300831 - 03/04/14 12:07 AM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
default Offline


Registered: 09/30/09
Posts: 516
Loc: Michigan
Replace ~10% of oil with kerosene.

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#3300839 - 03/04/14 12:26 AM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
Clevy Offline


Registered: 11/11/10
Posts: 6508
Loc: Saskatoon canada
Acetone,xylene,toluene. Any of these will work. If you've got a wire brush you can scrub the mud off.
However prior to disassembly I suggest running some mmo/seafoam in the pump. Overfill it so the mmo/oil splashes up against the bottom of the piston. Open the tanks draincock so the compressor can run full blast with minimal resistance.
Once you've run the compressor for a half hour or so drain and let cool.
Then use one of the solvents listed and a wire brush to clean whatever's left.
After the mmo/seafoam flush I doubt there'll be much to hand clean.
Some compressors allow the use of m1 15w-50 in the pumps. That or some syn v-twin oil would maintain cleanliness.
If using a detergified engine oil in the compressor pump I strongly suggest looking through the sight glass for air bubbles and if you see some you have to use ND-30. It won't bubble but since its non detergent it won't clean either.
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#3308414 - 03/11/14 03:26 PM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
camelCase Offline


Registered: 07/11/13
Posts: 149
Loc: Southeastern, USA
If you can get your hands on some d-limonene that'd be the trick.

Could also give chapala filter (http://www.jchapala.com/lubricants.php) a call and ask for their cleaner concentrate. You put 10-20% of sump capacity in, run for a week, then drain and fill with fresh fluid. Works every time.

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#3335013 - 04/06/14 02:08 PM Re: Cleaning compressor sump: What to use? [Re: ron in sc]
ac_tc Offline


Registered: 05/06/08
Posts: 461
Loc: sweden
Drain and fill, run for a short period like 2 minutes , drain and refill, done.
- I think your making a simple change way to complicated..
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