Compressor Motor Sparking on Start - The 1947 - Present Chevrolet & GMC Truck Message Board Network

epon · 06-22-2014, 11:09 AM

Wondering if this is normal on start up, motor is a baldor:

https://www.youtube.com/watch?v=z5lSbCYuRtc

TIA

dwcsr · 06-22-2014, 12:12 PM

yes

epon · 06-22-2014, 12:14 PM

thanks!, can def. see why one wouldn't want to be making fogs of paint around these things.

_Ogre · 06-22-2014, 02:38 PM

single phase motors have a start winding and switch, the switch is centrifical; closes when the motor stops and opens after a certain rpm
the start winding gets the motor turning in the correct direction and then opens the switch
the opening of the switch is what your seeing

and no, you wouldn't want to use it in an explosive atmosphere as you can also see a spark at your pressure switch

ERASER5 · 06-23-2014, 10:35 AM

One thing to check is if your bleed off switch is working as well as your check valve. The bleed off should hiss at shut down and if the check valve works, the hiss will stop after a few minutes. If the hiss does not stop, then the check valve is bad and the compressor will start up under full load. This causes significantly more start current and strain on the compressor.

epon · 06-23-2014, 10:37 AM

hiss stops shortly after the compressor stops

06-22-2014, 11:09 AM	#1
epon Registered User Join Date: Jul 2013 Location: Arizona Posts: 174	Compressor Motor Sparking on Start Wondering if this is normal on start up, motor is a baldor: https://www.youtube.com/watch?v=z5lSbCYuRtc TIA __________________ '82 C-10 SWB / C'd, Z'd, Body'd and Bagged / Shaved firewall, wiper cowl, drip rails, stake holes and tailgate/ 20" & 22" Milanni Voodoo '81 C-10 SWB Parts Truck IRC - http://webchat.snoonet.org/#baggedtrucks

06-22-2014, 12:12 PM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Compressor Motor Sparking on Start yes

06-22-2014, 12:14 PM	#3
epon Registered User Join Date: Jul 2013 Location: Arizona Posts: 174	Re: Compressor Motor Sparking on Start thanks!, can def. see why one wouldn't want to be making fogs of paint around these things. __________________ '82 C-10 SWB / C'd, Z'd, Body'd and Bagged / Shaved firewall, wiper cowl, drip rails, stake holes and tailgate/ 20" & 22" Milanni Voodoo '81 C-10 SWB Parts Truck IRC - http://webchat.snoonet.org/#baggedtrucks

06-22-2014, 02:38 PM	#4
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,680	Re: Compressor Motor Sparking on Start single phase motors have a start winding and switch, the switch is centrifical; closes when the motor stops and opens after a certain rpm the start winding gets the motor turning in the correct direction and then opens the switch the opening of the switch is what your seeing and no, you wouldn't want to use it in an explosive atmosphere as you can also see a spark at your pressure switch __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer

06-23-2014, 10:35 AM	#5
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: Compressor Motor Sparking on Start One thing to check is if your bleed off switch is working as well as your check valve. The bleed off should hiss at shut down and if the check valve works, the hiss will stop after a few minutes. If the hiss does not stop, then the check valve is bad and the compressor will start up under full load. This causes significantly more start current and strain on the compressor. __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60

06-23-2014, 10:37 AM	#6
epon Registered User Join Date: Jul 2013 Location: Arizona Posts: 174	Re: Compressor Motor Sparking on Start hiss stops shortly after the compressor stops __________________ '82 C-10 SWB / C'd, Z'd, Body'd and Bagged / Shaved firewall, wiper cowl, drip rails, stake holes and tailgate/ 20" & 22" Milanni Voodoo '81 C-10 SWB Parts Truck IRC - http://webchat.snoonet.org/#baggedtrucks



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