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#1 |
Registered User
Join Date: Dec 2007
Location: Millsboro, DE
Posts: 94
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1971 Factory Air Conditioning Hot/Cold Lever
What does the circled part actually do? How do I access it's connecting part(s)? Is it attached to a damper, and if so, is there a seal or rubber attached? Ultimately, could this part allow hot air to affect air conditioning / cooling?
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#2 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: 1971 Factory Air Conditioning Hot/Cold Lever
Before you address that cable you need to run vacuum to the pod on the side of evaporator housing in the upper right corner of the pic.
The vacuum valve just in front of your circle needs to be hooked to the damper arm.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#3 |
Registered User
Join Date: Jul 2015
Location: Euless, Tx
Posts: 431
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Re: 1971 Factory Air Conditioning Hot/Cold Lever
Here is a pic of the back side of the evaporator box so you can see what that rod attaches to
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#4 | |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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![]() Quote:
fleetmitch It looks like you've got to troubleshoot your vacuum lines on your a/c system before you dig any deeper. Without this vacuum control operating...and they currently are not hooked up....you won't be seeing much in the way of a/c. All Good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#5 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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If you take the cowl off you will see the flapper. It keeps outside air from entering the cab through the blower Motor. I have sealed mine off totally and took the vacuum line out. My AC runs great. It's on what the late models call MAX AC, not blend which is what you get when you have the flapper hooked up and operational. If the vacuum is not working correctly it will open and let hot outside air in + if it's all the way shut it's not a perfect seal. In other words your always adding fresh hot outside air to the AC system with the flapper opened any at all.
Just for good measure I have a manual hot water valve in line on my heater core to stop all water flow through the heater core. Any hot water coming through it to the cab will keep the temperature up inside the cab. Here is another post we talk about it. http://67-72chevytrucks.com/vboard/s...d.php?t=253275
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#6 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 1971 Factory Air Conditioning Hot/Cold Lever
I think there is some confusion. The part the OP is asking about is the blend door (hot/cold). You can see the door in Benny's picture.
The vacuum motor is for the recirculating/fresh air door.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#7 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: 1971 Factory Air Conditioning Hot/Cold Lever
If there is confusion, I started the confusion. The valve/door he was asking about appears to be ok. I noticed the vacuum actuator for the cowl damper is not hooked up, and mentioned that.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#8 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Not really confused. I figure he could figure out the cable by the picture posted. I was just giving him some more info on his AC for the vacuum canister if he wants to go that route.
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__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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