The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-07-2014, 12:38 PM   #1
ScottH
Senior Member
 
ScottH's Avatar
 
Join Date: Sep 2002
Location: Hampstead, NC
Posts: 8,190
AC compressor clutch cycles on and off

After fixing the blower motor & vent issues on the 87 V10 I recently bought, I tried the AC to see what would happen. It appears that the clutch on the compressor (I may not have the correct term) engages then stops right away and keeps doing this. I have heard that if it is low on Freon this could cause this. Can anyone verify this or offer other suggestions as to what the issue might be. Have no idea last time the AC was used in this truck.

Also is there any way to tell if the truck was converted to R134? If I need to add Freon it would be nice to know what kind to add.

Appreciate any help.

Thanks
Scott
__________________
1963 C10 swb fleetside
1966 GMC G1000 Handi-bus (future project)
1955 Chevy 2 dr. wagon
ScottH is offline   Reply With Quote
Old 08-07-2014, 01:51 PM   #2
Just call me Sean
Registered User
 
Just call me Sean's Avatar
 
Join Date: Jun 2014
Location: Orlando Florida
Posts: 1,598
Re: AC compressor clutch cycles on and off

You need gauges to see how much pressure is in the system, but most likely low on refrigerant. If it was converted it will have 134a adapter fittings screwed to the R12 fittings.

Been working on my '87, somebody removed most of the a/c stuff so I've been fixing everything you're fixing.
__________________
Quote:
Originally Posted by Early Cuyler
Fights begin, fingerprints are took, days is lost, bail is made, court dates are ignored, cycle is repeated.
Just call me Sean is offline   Reply With Quote
Old 08-07-2014, 11:51 PM   #3
ScottH
Senior Member
 
ScottH's Avatar
 
Join Date: Sep 2002
Location: Hampstead, NC
Posts: 8,190
Re: AC compressor clutch cycles on and off

Thanks Sean, appreciate ur help.
Not really sure what I am looking for, but doesn't appear to have adapters on the fittings.
__________________
1963 C10 swb fleetside
1966 GMC G1000 Handi-bus (future project)
1955 Chevy 2 dr. wagon
ScottH is offline   Reply With Quote
Old 08-07-2014, 11:52 PM   #4
Just call me Sean
Registered User
 
Just call me Sean's Avatar
 
Join Date: Jun 2014
Location: Orlando Florida
Posts: 1,598
Re: AC compressor clutch cycles on and off

R12 are threaded, 134a are quick disconnects which have no threads.
__________________
Quote:
Originally Posted by Early Cuyler
Fights begin, fingerprints are took, days is lost, bail is made, court dates are ignored, cycle is repeated.
Just call me Sean is offline   Reply With Quote
Old 08-07-2014, 11:56 PM   #5
ScottH
Senior Member
 
ScottH's Avatar
 
Join Date: Sep 2002
Location: Hampstead, NC
Posts: 8,190
Re: AC compressor clutch cycles on and off

that makes it easy, just what I need.

thanks
__________________
1963 C10 swb fleetside
1966 GMC G1000 Handi-bus (future project)
1955 Chevy 2 dr. wagon
ScottH is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:25 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com