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#1 |
Registered User
Join Date: Jan 2009
Location: greensboro, nc
Posts: 174
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What is this and does it need to be hooked to a vacuum source
Looking around behind the glove compartment area as I started putting my dash together I saw the heater/ac box with it's vacuum lines and manual controls... I followed a vacuum line that went through the firewall to see where it went and it was connected to the small round canister near on the firewall above the heater core lines. It also had a larger diameter hose coming out of it which I traced down to the A arm, dangling and unconnected.
I am assuming it's a vacuum canister for the heat/ac stuff in the cab but wanted to make sure. Also, am I right in saying the line/hose coming out of the canister needs to be hooked to an engine vacuum source? |
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#2 |
One shot, one kill.
Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
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Re: What is this and does it need to be hooked to a vacuum source
In a word, YES. The cannister you see is a reserve for the AC & heat doors when you accelerate hard and vac drops. Hook it up to any manifold vac source. jim
__________________
1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot ![]() |
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#3 |
Registered User
Join Date: Jan 2009
Location: greensboro, nc
Posts: 174
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Re: What is this and does it need to be hooked to a vacuum source
Thanks, will do. One question though, with it being disconnected does that mean the controls would not work properly if at all?
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#4 |
One shot, one kill.
Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
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Re: What is this and does it need to be hooked to a vacuum source
The modes would be switched and possibly frozen into the defrost mode only (default) for saftey reasons. The mode switch (vacuum valve) in the control head gets it's vac supply from the reserve cannister. jim
__________________
1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot ![]() |
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#5 |
Registered User
Join Date: Jan 2009
Location: greensboro, nc
Posts: 174
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Re: What is this and does it need to be hooked to a vacuum source
ok thanks for the info
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