A/C compressor clutch
Thread Starter
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Tuned
Joined: Feb 2007
Posts: 434
Likes: 0
A/C compressor clutch
Ok, over the winter I lost the clutch plate off of my compressor clutch on my 5.4. Don't know how exactly it happened, some how the bolt backed out and the plate eventually fell off. I have the new plate and getting ready to install it. I don't have the old shims to adjust it but I planned on scrounging some up around the garage...my question is, what are the downfalls of having it fully engaged all the time. It is pretty annoying having it engage and disengage all the time, it seems like mine will disengage/engage every few minutes. Im sure there are downfalls for adjusting it wrong to keep it engaged constantly I just don't know the system. Thanks for the help!
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
The clutch is controlled by the a/c cycling switch in the suction accumulator. It's purpose is to maintain the evaporator coil at a pressure that will maintain it's tempurature at slightly above freezing. If you allow the evap coil to go below freezing frost will build on it until it is blocked off. Having the clutch always on will cause the evap coil to drop below freezing, which will cause it to build frost, until it is blocked and no air can flow through it.
Also, the clutch will be disengaged by the Dual Function Pressure Switch. This is a switch on the high pressure side, that prevents excessive pressure that will damage the a/c compressor.
So, in short, the clutch is pretty mandatory.
Cab temp control is achieved by moving the blend door between the evap coil and the heater coil.
Also, the clutch will be disengaged by the Dual Function Pressure Switch. This is a switch on the high pressure side, that prevents excessive pressure that will damage the a/c compressor.
So, in short, the clutch is pretty mandatory.
Cab temp control is achieved by moving the blend door between the evap coil and the heater coil.
Thread Starter
|
Tuned
Joined: Feb 2007
Posts: 434
Likes: 0
The clutch is controlled by the a/c cycling switch in the suction accumulator. It's purpose is to maintain the evaporator coil at a pressure that will maintain it's tempurature at slightly above freezing. If you allow the evap coil to go below freezing frost will build on it until it is blocked off. Having the clutch always on will cause the evap coil to drop below freezing, which will cause it to build frost, until it is blocked and no air can flow through it.
Also, the clutch will be disengaged by the Dual Function Pressure Switch. This is a switch on the high pressure side, that prevents excessive pressure that will damage the a/c compressor.
So, in short, the clutch is pretty mandatory.
Cab temp control is achieved by moving the blend door between the evap coil and the heater coil.
Also, the clutch will be disengaged by the Dual Function Pressure Switch. This is a switch on the high pressure side, that prevents excessive pressure that will damage the a/c compressor.
So, in short, the clutch is pretty mandatory.
Cab temp control is achieved by moving the blend door between the evap coil and the heater coil.
