Craftsman Model No. 919.165250 starts, runs then pops the breaker

by Kevin C
(Syracuse, NY)

Craftsman Model No. 919.165250 nameplate

Craftsman Model No. 919.165250 nameplate

Craftsman Model No. 919.165250 starts, runs for a very short time, then pops the breaker


Craftsman Model No. 919.165250, approx 18 yrs old.

Last month, I brought it into the house from the garage, plugged it in, and it started out OK.

Then then motor started to "bog down" (ran slower and slower, til the circuit breaker tripped).

Tried different circuits - same result.

Did some research online - most often suggested repair is to replace the capacitors (GE 97F9614 and Mallory Start Capacitor 400-480µF 165VAC). Installed them today, plugged it in and turned it on. Motor didn't bog down, but still blew the circuit breaker. Did some more research - one web site suggested replacing the unloader valve; one said the windings in the motor might be shorted; another suggested the centrifugal switch. Given the age of the compressor, I don't want to drop too much money because the cost could approach the price of a new on if I simply keep swapping parts.

However, if the total repair cost is <$100 it's worth it, because otherwise the compressor is in very good shape and I used it quite a bit. Any ideas?

Comments for Craftsman Model No. 919.165250 starts, runs then pops the breaker

Click here to add your own comments

Nov 05, 2014
blows breaker
by: Doug in s.d.ca

I know you replaced the caps, but I think you should recheck the run cap.

If it's OK, then you may have a short in the motor windings.

You can try shorting the power cord (to remove any residual voltage) then connecting an ohmmeter across the motor, at the the lowest range, then turn the motor slowly. It should be an ohm or two and stay fairly constant. A bif drop would indicate a short.

Otherwise, I think a motor shop is your next destination.

Nov 05, 2014
Valve Check
by: KevinC

OK, so last night I pulled apart the head and valves. They seemed to be in good shape, so I pulled the piston and counterbalance off the motor and tried running it with no load. Ran for a few seconds then - yep - blew the breaker. Is there a quick test I can do or items on the motor that would cause this, that could be replaced?

BTW - I did try this on a 20 amp circuit - made no difference...still blew the breaker.

Nov 04, 2014
What valves
by: Bill

I'm referring to the intake and pressure valves found in the head of the pump, and often on a valve plate.

Sure, with the tank empty, remove and clean and check the tank check valve first. That never hurts.

Bill

Nov 04, 2014
blows breaker
by: Doug in s.d.ca

If you have a twenty amp circuit, did you try that? I see it's rated 15A, so maybe it's pulling enough over that to blow the breaker.

Also, is it blowing at a certain pressure? Or does it seem random/time related?

Nov 04, 2014
Valves
by: KevinC

Bill

Which valve(s) in particular? Is it the check valve where the line enters the tank or on the piston assembly?

Is there such a thing as a tear down/rebuild guide for this type of thing? I'm good with tools and fixing but some guidance always helps!

Nov 04, 2014
Maybe valves
by: Bill

Yup, that's the next check, and that means it's time to tear down the pump.

You'll want to have a valve kit and a gasket kit as it's likely that you'll damage gaskets as you disassemble, and if it turns out to be a bum valve, no point in tearing it down if you haven't got a replacement.

Or, if you want to first, take the motor to a motor rebuild shop and ask them to do a load test on it.

B.

Nov 04, 2014
Intake Air Filter
by: Kevin C

Double checked garage & workshop Circuit Breakers - both 15 amp. Pulled the air intake filter & tried to run the compressor - started but tripped the breaker again. When running the compressor doesn't sound "right" - not sure how to describe it well enough. Sounds a bit like a flapper valve? Does that make sense or help?

Nov 04, 2014
Breakers/Amperage
by: Kevin C

The breaker was a 15 amp breaker - same as the garage - with limited additional loads. I'll try the intake filter to see if that solve the problem and report back what happens.

Nov 04, 2014
Craftsman blowing breaker
by: Bill

Tell me about the amperage of the plug into which you plugged your compressor in the garage, and then compare that to the amperage of the breaker of the circuit in the house.

If the garage amperage circuit was higher, that's likely the issue, particularly after you've changed the caps.

Also, if the circuit amperage in the house is the same as the garage, what else on the house circuit is pulling power from the same circuit as opposed to the garage circuit? If too many items pulling power, you are underpowering the motor, and that may cause the problem.

If the compressor starts and runs, then it's not likely the unloader valve.

If the power supply is good, then it's time to consider the intake filter (remove that and see if there is any change), and then possible the valves.

Yup, it could be the motor too, but best to rule out things that may not cost much first.

Bill

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Craftsman Compressor Issues.