Air Compressor hard starting? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TexasLS1 · 10-01-2014, 05:04 PM

I've had a Craftsman Pro 27 gallon compressor for about 2 years, and I'm having trouble with it cycling. It runs fine initially, but it struggles to crank over on the second or third cycling (the motor will hum like it's trying to turn over, until it kicks the breaker or I shut it off). It has not been through any hard use, and is not used very often, so it looks like I bought it yesterday. Unfortunately it is past its warranty period

What do ya'll think, will I be buying a new motor, or is there something I can do to help ease start up? I'm a little frustrated to have a basically new compressor that won't work reliably, and wish I could have gotten this handled while under warranty.

ka_jd7and1 · 10-01-2014, 05:43 PM

Check the capacitors on the motor first.

Koffer · 10-01-2014, 06:23 PM

Also check the unloaded valve to see if it's sticking closed after it up to pressure as it bleeds pressure off the compressor head so it will start easier the next time

ERASER5 · 10-02-2014, 09:17 AM

Next check the check valve that prevents tank pressure from back washing into the head. The unload valve (if working) will continue to his until the tank is empty in off mode. The check valve is not really visible. That big nut that the compressor line attaches to is the top part of the check valve.

TexasLS1 · 10-02-2014, 06:27 PM

Thanks for the feedback guys!! Tons of help. I'll check it all out and keep you updated.

10-01-2014, 05:04 PM	#1
TexasLS1 Registered User Join Date: Jul 2012 Location: Jonestown, TX Posts: 470	Air Compressor hard starting? I've had a Craftsman Pro 27 gallon compressor for about 2 years, and I'm having trouble with it cycling. It runs fine initially, but it struggles to crank over on the second or third cycling (the motor will hum like it's trying to turn over, until it kicks the breaker or I shut it off). It has not been through any hard use, and is not used very often, so it looks like I bought it yesterday. Unfortunately it is past its warranty period What do ya'll think, will I be buying a new motor, or is there something I can do to help ease start up? I'm a little frustrated to have a basically new compressor that won't work reliably, and wish I could have gotten this handled while under warranty.

10-01-2014, 05:43 PM	#2
ka_jd7and1 is a fungineer Join Date: Jan 2009 Location: Bakersfield, CA Posts: 795	Re: Air Compressor hard starting? Check the capacitors on the motor first. __________________ 2003 S10, 2.2 auto- the daily driver, currently with a 2"/2" drop and some minor engine bolt-ons 1978 Impala 2-door, race 350/T350 - the new race car, in progress 1968 Chevy C10 longbed- 3/5 drop, currently undergoing a heart transplant

10-01-2014, 06:23 PM	#3
Koffer Registered User Join Date: Dec 2012 Location: Hopewell NJ 08525 Posts: 232	Re: Air Compressor hard starting? Also check the unloaded valve to see if it's sticking closed after it up to pressure as it bleeds pressure off the compressor head so it will start easier the next time __________________ '77 P10 (GMs late 60s thru the 70s truck spare parts bin model )

10-02-2014, 09:17 AM	#4
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: Air Compressor hard starting? Next check the check valve that prevents tank pressure from back washing into the head. The unload valve (if working) will continue to his until the tank is empty in off mode. The check valve is not really visible. That big nut that the compressor line attaches to is the top part of the check valve. __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60

10-02-2014, 06:27 PM	#5
TexasLS1 Registered User Join Date: Jul 2012 Location: Jonestown, TX Posts: 470	Re: Air Compressor hard starting? Thanks for the feedback guys!! Tons of help. I'll check it all out and keep you updated.



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