Bostitch CAP 1560 air compressor will not shut off

by Edward Hoffman
(Rochelle, Illinois USA)

Bostitch CAP 1560 air compressor

Bostitch CAP 1560 air compressor

The pressure in the tank builds up to approximately 130 PSI and continues to run at that pressure without shutting off.


Air seems to be escaping from the safety valve when the tank pressure reaches 120+ PSI.

I thought the problem was the pressure switch, so I ordered a new one from Bostitch and installed it, but the problem was not solved.

Is there something else that I am overlooking to help solve this problem. Thanks

Comments for Bostitch CAP 1560 air compressor will not shut off

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May 01, 2017
Ref answer on Oct 28, 2014
by: Henry

I am having the same problem you addressed then and made the same replacement the man said he did and have the same result. It builds up, blows off, builds up and blows off without stopping. If I shut it off when the safety starts to blow and then turn it back on right away it does not start pumping again until use drops the pressure and then it repeats the above unless I shut it off and turn it back on again. There must be a bigger problem. The preset shut off is there but just not kicking in but when it is manually turned off it recognizes that the limit has been reached. So do I trash it and buy a new one or is the a cure?

Oct 18, 2014
Bostitch CAP 1560
by: Bill

First of all, Edward, the specs for the Bostitch CAP1560 air compressor say that the high pressure is 125 PSI. That yours is getting to 130 PSI is worrisome, and, still suggests that your pressure switch is either not set for the right cut in and cut out pressure, not installed correctly, or it's not working.

When you say this "Air seems to be escaping from the safety valve when the tank pressure reaches 120+ PSI." are you speaking of the Pressure Relief Valve? That's an anomaly too, as that valve would have a normal cracking pressure in the 140 PSI range, and certainly should be higher than the 125 PSI which is the normal cut out of this air compressor.

If air is escaping as the pressure increases, and if the pressure switch cut out is, accidentally, higher than the specified 125 PSI, then it is possible that the compressor tank pressure doesn't get to the new cut out pressure, whatever that is on your switch.

Have a look at the switch setting instructions, and dial the cut out down to, say, 100 PSI to test and see if the switch works.

Then, set it back up to the 125 PSI and see if it works there. That may solve the problem.

Bill

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