Craftsman 5.5 HP 919.165070 starting the motor making the lights flicker

by Jim Krack
(Puyallup,WA, USA)

Starting the motor started making the lights flicker. Now it will not turn on w/o tripping the 20A breaker on 12-2 new wire.


Craftsman 5.5 HP, 20gal. tank, Model No. 919.165070, single cylinder oil-free.

I replaced the regulator, removed and checked the check valve, blew through the unloader line, then tried to start it w/o hooking the air line to tank up again. No luck.It will hardly make one full revolution before it stops. What's up?

Comments for Craftsman 5.5 HP 919.165070 starting the motor making the lights flicker

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Feb 09, 2015
Fixed it
by: Bill

Well done, Jim.

Glad you were able to nail down the problem and replace the start cap.

As far as I know, as long as the new cap has the same MF rating, and the same voltage, it doesn't matter the size, as long as it fits inside the housing.

Cheers,

Bill

Feb 09, 2015
My solution to the problem of flickering lights at start-up.
by: JimKrack

Bill,

I found the solution to my problem. Yes, you were right, it was the "start" capacitor that was bad.

I'd like to summarize my experience for others with the same problem (I notice that there are quite a few with the same issue of the breaker tripping when starting the compressor.) After totally dismantling and checking each component part, I could have saved a lot of time by zeroing in on the capacitor at the very beginning. But I didn't know anything about capacitors (There are two, a black "start" and a white "run" capacitors,) so I put it at the bottom of my lists of things to check. Mistake!!! It should have been at the top!!

I slowly dis-assembled the capacitors from the rear of the motor and took lots of pictures along the way to assist in reassembly. Then I was thrown a left curve when I found out that Sears no longer sells those capacitors. Further research proved that Mallory no longer is in business(they are now known as NACC-Mallory,) so where could I go to get a new capacitor? Answer: Back to the internet. Googling "400-480 MFD(Micro-Farads), 165V(Volts) capacitor. Then I had to narrow the options down to the correct dimensions of the capacitor, which is a cylinder. I had to find one that was 3 3/8" high with a diameter of 1 13/16". I finally found one, a Dayton brand, and the cheapest one was at Zoro.com. Dayton's number is 2MER1 and Zoro's product number is G0543636. It only cost a little over $16 plus $5 postage.

As soon as I hooked up the new capacitor, the compressor fired right off, just like a new one.

So, my advice now is, if you have problems with the breaker tripping or lights flickering, go straight to the "start" capacitor (not the "run" capacitor.) It was really a simple and cheap fix. Don't be reluctant to get that black housing off. All you need a #20 torx head screwdriver about 6" long for the 4 screws. Then take pictures as you dismantle. If a dummy like me can find success, anyone can! Good luck. :-)

Jim Krack (253) 666 2541.

Jan 14, 2015
Capacitor, you say?
by: Jim Krack

Bill,

I found a youtube video on how to repair/rebuild the oilless pump just like on my AC. It's about 23 min.long, and is an excellent video. With that as my guide, I was brave enough to disassemble my pump to check if everything looked good. It did, so I reassembled the pump. So, with the airline disconnected from the pump head, I tried to give it a quick attempt to start--just long enough to see if the motor rotated. It still hummed a bit, then kicked the breaker after turning about 1/8 of a revolution. That's when I said "Must be the capacitor/(s)", and that's when I joined this forum. Thanks for the guidance!

Jim

Jan 14, 2015
Capacitor, you say?
by: Jim Krack

Thanks Bill, Will do.:-)

Jim

Jan 14, 2015
Compressor Motor Capacitor?
by: Bill

Hi Jim.

Could be other things causing this when your Craftsman compressor starts, but to my mind, the lights flicker and dim because the motor is trying to start, and without the start capacitor (one of those tubular thingies on the side of the motor) to boost the motor, the motor is pulling more amps than normal, and that drains power throughout the power circuit.

Of course, if the pump is seized, that could do it too.

Good luck. Please keep us posted with your findings as that will help others with the same issue.

Bill

Jan 13, 2015
Capacitor, you say?
by: Jim Krack

Thanks Bill,

I've convinced myself that the capacitor(s)? are in deed the problem. I don't understand electricity very well, so I am waiting for an electrician friend to test it/them. There is a black cylindrical "thingee" and a white one. I'm clueless what each does.

Jim

Jan 13, 2015
Making lights flicker
by: Bill

Have a look at the page on this site about checking your capacitors. That's a logical spot to start, Jim.

Bill

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