Air compressor, do I need to replace the regulator or something else?

5 years ago

I have a Campbell Hausfeld HL550100 air compressor. It's a small tank that I mainly just use to inflate tires, and very rarely for a few air tools.

A few days ago I was pulling it along, when the regular cap just popped off! I hadn't loosened it or anything, and the tank was empty, so it was a pretty big surprise.

I screwed it back on and filled up the tank, only to find that now it doesn't release the air to the hose.

Under the cap is a black plastic ring. It's greasy (by design, I think) and doesn't appear damaged.

Underneath that is a brass piece that I assume is the pressure switch? It doesn't appear damaged, but I poked around on it and nothing happened. Since no air is coming out with the regulator cap off, I'm guessing that this piece is the problem child.

I can buy a new regulator for about $20, but it looks like pretty much everything else (including the pressure switch and unloader) is discontinued and no longer available :-(

What do you all think, would replacing the regulator fix this? Or is there something I should try to fix it without replacing? Or is it just a big brick now?

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Comments (3)

krnuttle
5 years ago
I am not sure exactly what you are talking about, but this may help you

https://mastertoolrepair.com/portable-oilbath-directdrive-electric-air-compressors-parts-hl550100-hl550195-hl550600-p-746869.html
Jason, zone 7A, near Greensboro NC
Original Author
5 years ago
Good news! I figured out the problem, no parts required :-D

Underneath the regulator cap is a heavy spring... when the cap popped off (still no explanation of that one), the spring went flying in the grass and I didn't know it. I found it today, and putting it back under the cap solved the problem.

Hopefully this will help a future reader!
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loger_gw
5 years ago
Sounds Interesting! Please post a pic of of the assembly IDing what poped off. What did you do to prevent it from happening again?

I have a Cambel Hosfield 1 HP I purchased 1972 that still Runs great (serviced every 2-3 years depending on the use. From my 2-3 year Inspections Related to use I feel it has held up well. I hope I am not repeating info. My Pic might show the ck list and repairs.

My Majors:

1. A Timer to tuun off power if I forget.

2. Dated oil changed & note of condition.

3. A Gal Pipe Below The Tank to hold Moisture vs the Tank.

4. Repairing Compressors andTanks taught me to Buy and Maintainying vs Patching.

5. I do have a pin hole with a s/n screw and rubber washer fix over 20 Yso.

6. I also have New Donated tank waiting if I ever notice some holes in the Tank!!!

Past problems:

1. From painting cars the Air Intake Filter needed changing regular.

2. Replaced the Pressure Regulator Switch.

3. Replaced the Armatuer Bearings.