Ac vacuum selector switch part number w/ compressor question
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Tuned
Joined: Mar 2005
Posts: 479
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From: Mesa AZ
Ac vacuum selector switch part number w/ compressor question
I recently picked up a 74 f100 factory ac truck. Last week I was able to confirm that the system was still full of r12 and the expansion valve will get cold when run. The blower turns on, but I have no air from the vents. I opened up the dash to take a look and found the vent selector vacuum valve to have come apart. This obviously happened some years back and they just disconnected the vacuum line under the hood. Looking on line, there are several options for the valve. Lmc lists two factory part numbers that do not match mine. My valve has D3TAI9B919 ac on it.What is the correct valve?
I wanted to check the oil level in the compressor, but mine does not have service valves on top. This would mean I cannot check it without losing the charge, correct?
I wanted to check the oil level in the compressor, but mine does not have service valves on top. This would mean I cannot check it without losing the charge, correct?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
I recently picked up a 74 F100 factory A/C truck. Last week I was able to confirm that the system was still full of R-12 and the expansion valve will get cold when run. The blower turns on, but I have no air from the vents. I opened up the dash to take a look and found the vent selector vacuum valve to have come apart. This obviously happened some years back and they just disconnected the vacuum line under the hood. Looking on line, there are several options for the valve. Lmc lists two factory part numbers that do not match mine.
My valve is marked with ID engineering number: D3TA-19B919-AC
My valve is marked with ID engineering number: D3TA-19B919-AC
1973/79 F100/350, 1978/79 Bronco.
CARPENTER NOS OBSOLETE PARTS in Concord NC has 65 = 800-476-9653.
Pic: Illustrated as 19B888 at lower left.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Here's a link to the York service manual. It gives you all the info you'll need. Page 7 has the oil level info.
P.S. Your control valve coming apart is a real common problem.
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Tuned
Joined: Mar 2005
Posts: 479
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From: Mesa AZ
Sorry for the delay in reply. Thank you both! got the valve ordered and installed. The hot cold valve came apart as soon as i messed with it, but that one can at least be bypassed with a single vacuum line. System comes to life and makes mildly cool air. Txv gets very cool. Going to check pressures and add some r12 if needed. Prior to that I plan to put a new blower motor in and clean everything out.
Laughing Gas
Joined: Nov 2013
Posts: 1,207
Likes: 60
From: S.E. Louisiana;so far USA
You might be able to "capture" the R12, check the compressor's oil, add service valves and a sight glass to aid in charging, and reuse the charge.
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