Use engine driven vacuum pump for AC system?
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Mountain Pass
Joined: Jan 2008
Posts: 226
Likes: 4
From: Glendale, AZ
Use engine driven vacuum pump for AC system?
Crazy thought, and feel free to tell me it's a stupid idea that will never work 
Knowing that the vacuum pump on diesels are supposed to pull 20+ inches of vacuum, could I unplug the pump from the rest of the truck, and use it to vacuum down the AC system when I rebuild it later this year?
I'm sure there's probably some technical difference between a brake vacuum pump and an actual AC vacuum pump, but then I'd also feel silly if I spent $100 on a pump only to have someone later on ask why I didn't do like every one else and use the pump on the motor, lol.
Knowing that the vacuum pump on diesels are supposed to pull 20+ inches of vacuum, could I unplug the pump from the rest of the truck, and use it to vacuum down the AC system when I rebuild it later this year?
I'm sure there's probably some technical difference between a brake vacuum pump and an actual AC vacuum pump, but then I'd also feel silly if I spent $100 on a pump only to have someone later on ask why I didn't do like every one else and use the pump on the motor, lol.
i ain't rite
Joined: Mar 2005
Posts: 65,448
Likes: 5,518
From: Marlboro Mental Hospital.
it could probably work, but how are you going to keep the system sealed and under vacuum when disconnecting the ump to hook up the refrigerant gauges?
i never even considered using the engine driven pump to evacuate the AC system.
but then again, i have had an AC vacuum pump for over 30 years.
i never even considered using the engine driven pump to evacuate the AC system.
but then again, i have had an AC vacuum pump for over 30 years.
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eodtek32
1987 - 1996 F150 & Larger F-Series Trucks
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Jun 7, 2014 08:04 AM
