Recharging AC ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

greenhorn male · 09-19-2005, 07:53 PM

On the factory 72 AC which valve do you connect the hose to when recharging with a canister and hose adaptor. All I see are two valves. One close to the passenger side hood hinge and the other on the cannister on top of the compressor. Any advise is appreciated also. I only have one cannister.

Gordo · 09-19-2005, 09:18 PM

The thinner lines/hoses would be the high pressure side. The heavier, fatter lines/hoses would be the low pressure (suction) side. Fill it thru the low pressure side with the engine running. Do not attempt to fill it thru the high pressure side with engine running. Hope this helps.

mvpco · 09-20-2005, 01:16 PM

closests to passenger side

Jeff

sneakysnake · 09-20-2005, 02:28 PM

It should really be leaked checked vacuumed down, and if the system has been opened to the air it really should be vacced down to remove moisture and uncondenseables.
here is the suction port

greenhorn male · 09-20-2005, 03:25 PM

Thanks for all the responses. This helps, specially the pic.

09-19-2005, 07:53 PM	#1
greenhorn male Senior Member Join Date: Jan 2003 Location: Bay Area, Northern California Posts: 1,344	Recharging AC ? On the factory 72 AC which valve do you connect the hose to when recharging with a canister and hose adaptor. All I see are two valves. One close to the passenger side hood hinge and the other on the cannister on top of the compressor. Any advise is appreciated also. I only have one cannister. __________________ 03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays.

09-19-2005, 09:18 PM	#2
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	The thinner lines/hoses would be the high pressure side. The heavier, fatter lines/hoses would be the low pressure (suction) side. Fill it thru the low pressure side with the engine running. Do not attempt to fill it thru the high pressure side with engine running. Hope this helps. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

09-20-2005, 01:16 PM	#3
mvpco Registered User Join Date: Apr 2005 Location: Pensacola, FL Posts: 400	ac closests to passenger side Jeff

09-20-2005, 02:28 PM	#4
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	It should really be leaked checked vacuumed down, and if the system has been opened to the air it really should be vacced down to remove moisture and uncondenseables. here is the suction port Attached Images

09-20-2005, 03:25 PM	#5
greenhorn male Senior Member Join Date: Jan 2003 Location: Bay Area, Northern California Posts: 1,344	Thanks Thanks for all the responses. This helps, specially the pic. __________________ 03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays.



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