CAP60P-OF will not restart automatically

by Tom
(Slaughter, Louisiana, USA)

CAP60P-OF air compressor

CAP60P-OF air compressor

My Bostitch CAP60P-OF will build the pressure and shut off but, will not come back on automatically.


I have to shut the switch off and let it sit for 5-10 minutes.

I turn it back on and it will run again and the same routine.

All it is go for at this point is putting air into the tires.
Suggestions?

Thanks,

Tom

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May 23, 2015
A puzzler, Tom
by: Bill

That hiss you hear when the compressor reaches cut out is, I presume, the unloader valve unloading. That should only happen for maybe a second or two at most. After that, no air should bleed out of the unloader.

Now, you say you have to wait for a while and then it will start again? That's suggesting that the compressor is going off on thermal overload which points to a motor, motor capacitor, a centrifugal switch issue on the motor if it has one, or it could just be the pressure switch.

Try this next, if you would.

Let the compressor run down to cut in. At this point it will not start, you say. With a great deal of care, pull the cover off the pressure switch, and with a mutli-meter, see if power is across the switch and on the motor side. If the pressure switch is working, then it should have tripped to passing once the pressure dropped to cut in, and if there is no power on the motor side of the switch, odds are good it's the pressure switch that is the issue.

However, I'm leaning toward a motor issue, and it were me, after checking to make sure the pressure switch was tripping on when it was supposed to, I would then check the start capacitor to see if it was working, next. See the page about how to check the cap on this site.

Bill

May 22, 2015
Update
by: Tom

Hi, Bill:

The compressor will run as normal and build pressure. When it reaches max. pressure it stops...there is a short hiss... and I can continue to until no air pressure. At the point where it should normally kick back on because of low air pressure it does not turn on. I push the switch button in to turn it off or I pull the plug and wait 5-10 minutes. I plug it in turn it on and it will run like normal...until it shuts off at max pressure again and the routine begins over again.

May 22, 2015
CAP60P-OF won't restart
by: Bill

Tom, what is happening (or not happening ) as you bleed off air from the tank, and the tank air pressure falls to the normal cut in pressure setting?

Any noise, air just continues to bleed out and nothing is happening at all... more details, please.

Bill

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cap60p-of shuts off at 125 but starts to bleed down immediately.

by Cliff Biddlestone
(Belle Vernon,Pa.)

Builds pressure, shuts off at 125 but starts to bleed down immediately.

I have a cap60p-of. 2007 model. builds pressure just fine it seems.

Shuts off at approx. 125 but starts to bleed down immediately and turns back on at 90lbs.

Thought it might be the pres. switch so I bought a new one and changed it.

Same problem.

Found that when I played with the plastic switch cover I can get it to shut off and hold pressure. I am baffled. Can you please help this old man with this problem?

Also I can get to hold pressure by pulling the plug.

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Mar 25, 2015
Cap60p-of shuts off
by: Bill

Ummm, no, I think you are referring to the unloader tube, Cliff.

Ok, when you say " all seems OK until it reaches pressure and shuts down, then approximately 10lbs. down it starts back up " that's saying to me that the cut in / cut out of the pressure switch setting is wrong.

The compressor should not start until the normal cut in pressure is reached, and is normally quite a bit less in PSI than 10.

Did you check the tank check valve?

Bill

Mar 25, 2015
Changed that.
by: Cliff Biddlestone

I think your referring to the little black plastic valve on the end of the 1/4in black tube from the tank to the pressure switch, the new switch came with a new one and I changed it. That's what has me puzzled? I take the cover off the switch and watch it while it charging and all seems OK until it reaches pressure and shuts down, then approximately 10lbs. down it starts back up. What else can I do? Any more help will be appreciated. Thanks again.

Mar 25, 2015
Cap60p-of shuts off
by: Bill

Cliff, your compressor symptoms suggest that your tank check valve is leaking.

Unplug the compressor, drain all the air from the tank, dismantle the connection where the hose from the pump enters the tank, and check/clean/replace the tank check valve.

Test.

Post a comment with your findings if you would.

Bill

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Bostitch CAP60P-OF Compressor - Won't Build Pressure

Helping out my father in-law with this. He said that it will get up to about 80psi and that's it. It will keep running but won't get above that. He says the more he uses it the less air it will hold (i.e. a month ago it was 100psi, then 90, now 80, etc).

And ideas?

Thanks!

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Sep 22, 2014
Won't build pressure
by: Bill

See the troubleshooting page for links to a page about why air compressors don't build pressure.

When you've done that, and done the checks, if you determine that it is likely intake or pressure valve that is failing, the kit for it is linked below.

Cheers,

Bill




Please note: If you acquire a product using the Amazon link provided above, they will pay us a small commission which is used to help offset the cost of maintaining this website. Thanks!


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2008 Bostitch CAP60PB-OF compressor. No air pressure exhausted.

by Kevin
(Newport NH)

I have an '08 Bostitch CAP60PB-OF pancake compressor which builds air pressure fine, just won't exhaust it outward to hose or any in-line accessory.

I've looked at parts diagrams and wonder about the AB-9051116 pressure regulator. I've taken the existing regulator apart, given it a little WD40 and reassembled everything to no joy.

I've seen the part on-line for $12.99 but hoping to get some guidance here. Thanks!

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Oct 12, 2014
No air out of hose on Bostitch compressor
by: Bill

See the troubleshooting page No Air Out of Hose for some guidance, Kevin.

Yup, it sounds like the regulator to me, but have a read of the page as there are some checks you can do noted there.

Cheers,

Bill

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