| [GMCnet] Re: Dash air conditioning [message #364879 is a reply to message #364825] |
Mon, 21 June 2021 17:31  |
Emery Stora
Messages: 959
Registered: January 2011
Karma: 4
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Senior Member |
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I had purchased a Sanden SD7 model 4434 from Applied GMC.
The fitting on the back of it exactly matches the GMC hoses. No retrofitting required. It bolts right into place.
The compressor came with mounting brackets that bolt to the front of the head so it eliminates the GMC bracket that goes over the valve cover.
Much easier to remove the cover if needed.
I have an inside 18,000 but evaporator as well as the original heater box evaporator. The compressor is large enough to drive both.
The compressor is much easier to install as it is at least half the weight of the A-6 that it replaces.
Emery Stora
emerystora@mac.com
> On Jun 18, 2021, at 2:18 PM, Jon Roche wrote:
>
> Tom-
>
> the changing of a compressor to the Sanden, is something I would do. Yes it is less BTU's, but it has plenty enough unless you are adding large
> multiple evaporators. It does not seem to load the engine like the A-6. I cannot ever tell when the compressor clutch kicks in or out, is running or
> not running.
>
>
> the conversion is always more complicated than some make it sound, but it is not anymore complicated than probably anything else you can do.
>
> you need the compressor itself, and it uses a different bracket. the compressor comes with a 2 grove V belt pulley, and you need a different belt for
> it. you will not need 2 belts, one of the two grooves lines up properly.
> (napa XL-7585 is the one I am using).
>
> the hose fittings to the compressor are completely different, then what the A-6 uses. so you either need new hoses made, or if your hoses are in
> good shape, you maybe able to cut of the old fitting and crimp on a new one.(I have not done or tried this). Jim K's kit I think comes with the
> needed hoses. You also have to cut and wire up the wire that engages the clutch, as that connector is different between the compressors.
>
> If yours is converted to r-134, you should be fine on refrigerants as long as you don't install another compressor with the old oil in it. as I
> understand the oil is what you don't want to mix.
>
>
> I installed the new compressor/bracket/belt, made my own hoses and have them up to a vintage air under dash aux. evaporator, bypassing and not even
> using the original dash air evaporator. I replaced the dryer, and I used a aerosol "flush" can and compressed air to blast everything out of the
> condensor(the only part that I retained from the OEM system). so I am running PAG oil now with duracool refridgerant.
>
>
>
>
>
> --
> Jon Roche
> 75 palm beach
> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
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