dash heater control switch, vacuum lines
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Austin4x4
Topic author - Posts: 256
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dash heater control switch, vacuum lines
it has been several months sience i took it apart and i can't remember where the three vacuum lines go on the back of the switch. dash is a 1973.
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AwesomeJ10
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Re: dash heater control switch, vacuum lines
IIRC the middle port is the vacuum source. Then just plug in the other two into the heater/defroster and test.
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REDONE
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- Location: Lakewood and Bailey, CO
Re: dash heater control switch, vacuum lines
This is exactly what I did with my 79, but I don't remember which was which. Only took a few minutes tho.Blake wrote:IIRC the middle port is the vacuum source. Then just plug in the other two into the heater/defroster and test.
79 J-10 (Honcho Mucho) KE0LSU
304/Performance Fuel Injection TBI/MTA1/SP2P/Magnum rockers
T18/D20/D44s&4.10s/33" Mud Claws
Grizzly Locker Rear
4" front spring drop, 5" rear shackle flip
Chevy style HEI (ECM controlled)
Dolphin "Shark" gauges in a fancy homemade oak bezel
3/4 resto, rotting faster than I've been fixing it.
304/Performance Fuel Injection TBI/MTA1/SP2P/Magnum rockers
T18/D20/D44s&4.10s/33" Mud Claws
Grizzly Locker Rear
4" front spring drop, 5" rear shackle flip
Chevy style HEI (ECM controlled)
Dolphin "Shark" gauges in a fancy homemade oak bezel
3/4 resto, rotting faster than I've been fixing it.
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az chip
- Posts: 1433
- Joined: Tue Jul 14, 2015 8:59 pm
- Location: Mesa, AZ
Re: dash heater control switch, vacuum lines
Is the middle the source? Can anyone verify?
'81 Cherokee Chief 81 WT Chief/MSD 6/Holley Sniper/ Rusty 4" Spring lift/ Bulltear oil adapter/K&P Engineering Oil Filter/ NP 208/ Serehill Light Harness/KC LED Headlights/ Evil Twin Fab Roof Rack and sliders/ Ross mirror mounts.
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Tatsadasayago
- Posts: 3684
- Joined: Thu Aug 28, 2014 2:22 pm
- Location: Sacramento, CA
Re: dash heater control switch, vacuum lines
Yes, Blake is correct. You can confirm the other two by testing before putting the cluster back in. I've had to test so many times I finally put testors model paint on the hoses and valve to save time and hassle. I believe that some of the valves were marked F V and D for floor, Vacuum and Defrost near the nipples. Most I've seen aren't marked however.
1977 Cherokee Chief - The Blair Jeep Project III
A collection of parts flying in close formation
A collection of parts flying in close formation
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Tatsadasayago
- Posts: 3684
- Joined: Thu Aug 28, 2014 2:22 pm
- Location: Sacramento, CA
Re: dash heater control switch, vacuum lines
FYI: You can in fact disassemble the valve for cleaning and lubrication 
1977 Cherokee Chief - The Blair Jeep Project III
A collection of parts flying in close formation
A collection of parts flying in close formation
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MadMax78
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- Joined: Tue Mar 26, 2013 12:40 pm
- Location: Guin, AL
Re: dash heater control switch, vacuum lines
Tats, I think you should do a step by step how to on disassembling the valve for cleaning and lubing. Wasn't aware they could be taken apart.
I also used testors model paint to mark the hoses and nipples they go to. Great minds think alike.
I also used testors model paint to mark the hoses and nipples they go to. Great minds think alike.
MadMax78
78 Cherokee S, Wide Track, 360, TH400, Quadra Trac, TAD's SOA, 35" BFG KM2, Edelbrock Carb & Intake, MSD Coil & Ignition
78 Cherokee S, Wide Track, 360, TH400, Quadra Trac, TAD's SOA, 35" BFG KM2, Edelbrock Carb & Intake, MSD Coil & Ignition
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letank
- Posts: 4025
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- Location: SF bay area
Re: dash heater control switch, vacuum lines
the OEM hoses are color coded , the red is the center one, or 12 o'clock, the white is 11, and the green is 1 o'clock.
Michel
74 wag (349 Kmiles... parked, next step is a rust free body)
85 Gwag (229 Kmiles... the running test lab)
74 wag (349 Kmiles... parked, next step is a rust free body)
85 Gwag (229 Kmiles... the running test lab)
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Tatsadasayago
- Posts: 3684
- Joined: Thu Aug 28, 2014 2:22 pm
- Location: Sacramento, CA
Re: dash heater control switch, vacuum lines
I didn't take photos when I pulled maintenance on mine unfortunately. I removed the valve and took it apart by removing three screws, cleaned the housing with a small brush and brake cleaner and used WD-40 to clean the rubber gasket. I used Vaseline to lubricate the rubber gasket before re-assembly. During testing I noticed the vacuum motors didn't just thump, they SLAMMEDMadMax78 wrote:Tats, I think you should do a step by step how to on disassembling the valve for cleaning and lubing. Wasn't aware they could be taken apart.
I also used testors model paint to mark the hoses and nipples they go to. Great minds think alike.
1977 Cherokee Chief - The Blair Jeep Project III
A collection of parts flying in close formation
A collection of parts flying in close formation