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#1 |
Senior Member
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Location: Northern Nevada
Posts: 7,233
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What are these parts pretty please?
71 Chevy with A/C:
No longer useful, good info. follows:
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 06-26-2018 at 08:25 PM. |
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#2 |
Registered User
Join Date: Aug 2007
Location: orlando
Posts: 456
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Re: What are these parts pretty please?
Don't know what the 1st photo is, the 2nd looks like a relay plug. Headlight, horn, or A/C?
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A man's thoughts devise his ways; but it's GOD that directs his steps. |
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#3 |
Senior Member
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Location: Northern Nevada
Posts: 7,233
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Re: What are these parts pretty please?
Must be A/C. Don't know where it goes yet.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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#4 |
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Join Date: Dec 2007
Location: Santa Maria, Ca.
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Re: What are these parts pretty please?
The top one is the vacuum control for the heater hose under the hood and the passenger side vent door see attached diagram. I'm pretty sure the bottom one plugs into the back side of the fan switch
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69 Chevy 4x4 383 Power ![]() |
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#5 |
Senior Member
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Location: Northern Nevada
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Re: What are these parts pretty please?
Funny, I located the "Recirculated Air Door Diaphragm" name from that image. Probably your post. Do you mean plugs into the Control Head Vacuum Switch? Maybe that's the part in image 1? Switch throws me off, there's not an electrical connection. I guess "switch" doesn't have to involve electrical. Yeah, I'm pretty green.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-22-2015 at 08:01 PM. |
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#6 | |
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Join Date: Dec 2007
Location: Santa Maria, Ca.
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Re: What are these parts pretty please?
Quote:
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#7 | |
Senior Member
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Location: Northern Nevada
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Re: What are these parts pretty please?
Quote:
I misunderstood your original post. Thought you were still talking vacuum lines.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-22-2015 at 08:53 PM. |
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#8 |
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Join Date: Dec 2007
Location: Santa Maria, Ca.
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Re: What are these parts pretty please?
In the electrical section there is a color wiring diagram that you might be able to track down that plug by the color of the wires in it
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#9 |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,483
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Re: What are these parts pretty please?
-
Here are a couple of pictures that show the vacuum switch location on the heater control.. I borrowed them from member "Classic Bowties" post. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#10 |
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Location: Northern Nevada
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Re: What are these parts pretty please?
The more I study that image the more it makes sense:
Port #1 on the Control Head Vacuum Switch connects to the Water Valve. Port #2 on the Control Head Vacuum Switch connects to the Outside Air Door Diaphragm and the Recirculated Air Door Diaphragm. Therefore, the line that's loose is supposed to be hooked up to the Outside Air Door Diaphragm. Port #3 on the Control Head Vacuum Switch connects to Vacuum Reservoir. This is the other one that's loose. Ha!..........My Water Valve is connected to the Outside Air Door Diaphragm and nothing is connected to the Vacuum Reservoir. I'm no mechanic, but I think that means it aint doing *&%*. Thank you for this information.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-22-2015 at 08:52 PM. |
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#11 |
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Re: What are these parts pretty please?
Thank you Lock. I knew where it installed, just didn't know what it was. I have a better idea now. These trucks are cool. Learning a lot. At some point I'll need to determine how the vacuum lines are supposed to rout through the firewall. Things are a lot more difficult for the novice when they aren't factory correct.
Found just one of three cables was connected to the unit with a nut of some type. Doesn't appear any of them need it, but I'll probably add push retainer nuts anyway. I was pleasantly surprised how easy it was to remove, take apart, clean and reassemble. That said, one of three chrome fittings for the control levers wouldn't come, and I proceeded to ruin it.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-23-2015 at 12:23 AM. |
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#12 |
Registered User
Join Date: Dec 2007
Location: Santa Maria, Ca.
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bump for OUbesto
bump
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#13 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
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First picture is the vacum valve that attaches to the controller in the dash it directs the vacum to the hot water valve and the flapper door on passenger side bottom of the cab and the flapper inside the cowl on the outside of the truck.
Second picture is the AC clutch cycle wiring that has the plunger attached to it. Goes behind the AC ducting inside the cab. The three prong plastic connector in second picture is the anti dieseling relay. These should help! My first picture even shows the vacum port that you posted but it's a 2 prong one with the tee inline. Either one will work. ![]() ![]() ![]()
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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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#14 |
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Re: What are these parts pretty please?
That's awesome Andy, thank you. Incidentally, that harness per the original post may be for a CB radio.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-28-2015 at 01:31 AM. |
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#15 |
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Location: springfield mo
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Re: What are these parts pretty please?
So my water valve is gone, and by the looks of my mess of vacuum lines, was bypassed. Is it possible to just remove the water valve and bypass it?
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() Last edited by tommys72; 11-22-2015 at 05:23 PM. |
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#16 |
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Location: springfield mo
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Re: What are these parts pretty please?
in these pictures are the yellow circles the same "T"? where do the vacuum lines in the green circle go to? in the green circle i assume one of these lines go to port 3 on the control head vacuum switch. and how many lines are supposed to be on the vacuum actuator (air inlet valve)? The red circle in the pictures
port 2, if im reading all the above correctly, is t'eed (yellow circles) to both inside and outside vacuum actuators? and port 1 goes directly to the water valve right? truck is a 72 with factory ac.
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() Last edited by tommys72; 11-22-2015 at 05:52 PM. |
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#17 |
Old member
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Location: Liberty, & Garden City S.C. , U.S.
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Re: What are these parts pretty please?
Let me take shot.
The green circle is the vacuum ball that gives you reserve. Line form intake vacuum goes in to ball and then line out goes to AC/Heater control head on dash. The line in the middle of each picture is the fire wall so the only tee's are inside the truck cab if using the 2 vacuum head. If using the 3 vacuum head then you have one tee out under the hood. With a two vacuum port it's the top looking at this picture. ![]() Looking at the 3 vacuum port it's also the top. ![]()
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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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#18 |
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Re: What are these parts pretty please?
Ok so of your bottom pic, port 1 straight to water valve. Port 2 teed to both diaphragms . And port 3 straight to vacuum ball. Correct?
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() |
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#19 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
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![]() Quote:
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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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#20 |
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Re: What are these parts pretty please?
Nice! Thanks Andy!
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() |
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#21 |
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Re: What are these parts pretty please?
So what determines using 2 or 3 ports? Haven't taken anything apart yet, but it seems mine is 2 port. Ac doesn't work, no water valve, and appears to be 2 ports. All the ac stuff is still there. Any of that sound right ?
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() |
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#22 | |
Old member
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![]() Quote:
If I remember right it's just by what year your truck is. I would have to look at the manual's and see which one is for what years. Those 2 pictures came out of each manual. 1 is a 69 and the other is a 71 but I don't remember which is which right off. ![]()
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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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#23 |
Registered User
Join Date: Mar 2014
Location: Broken arrow
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Re: What are these parts pretty please?
Where is the vacuum source?
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#24 |
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Re: What are these parts pretty please?
At the rear of the intake manifold
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#25 |
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Re: What are these parts pretty please?
My manual is a 71, truck is a 72.
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United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son ![]() |
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