A/C Question

[kalger]

I'm working on removing my SBC 350 from my 1975 GMC C1500. It has factory A/C that doesn't work. Not sure what the issue is, probably the compressor. Anyway, what are the options to remove all the A/C bits and pieces (not sure how charged the system is still) and then put everything back together, get a new compressor, and charge the system with coolant that's compatible with what's in place?

Thanks.

 

[Scott91370]

There are only 4 main parts to the system:
Compressor, Condenser, Accumulator (drier) and Evaporator.

If you open it for any reason you should replace the accumulator/drier - this removes moisture.
You could start by replacing the compressor and drier which will usually solve the issue - if it is not electrical in nature.

That's about all I can help you with. I have a friend that does auto a/c work so I don't touch it.
When I did mine last year everything got replace so I could run whatever the latest refrigerant is.

 

[fast 99]

It's not difficult but some procedures need to be followed. Any part not replaced needs to be flushed of oil and contaminates. In addition to previous post replace all lines and seals. Buy a conversion kit. Replace hoses if original, they are too old, 134A is a smaller molecule will leak easier. New hoses are made out of barrier material. Replacement compressors will work with 134A. Follow oil fill amount and total fill quantity. Will need to be vacuumed down before refill. Easiest to have a shop refill the system. If you want to do it yourself a gauge set, pump and scale will be needed. Not sure about Oregon but in Washington small cans of refrigerant are banned.

 

[Ricko1966]

At this stage of the game and not knowing the charge status,what works,etc. I'd unbolt the compressor. Bungee it to one side, pull my engine and leave my AC alone until I had my drivetrain Ironed out. Less stuff to lose,no AC to discharge,etc. At this stage if the game for all you know it's charged and work but has no power to AC clutch etc.

 

[CalSgt]

At this stage of the game and not knowing the charge status,what works,etc. I'd unbolt the compressor. Bungee it to one side, pull my engine and leave my AC alone until I had my drivetrain Ironed out. Less stuff to lose,no AC to discharge,etc. At this stage if the game fir all you know it's charged and and but has no power to AC clutch etc.

I'm with Rick on this one...

Unless you are prepared to do a complete overhaul of the system at the same time as the engine, just leave it be.

Also, first thing I would check is the charge on the system. If it is slightly charged it will not allow the compressor to start, it may just need a re-charge to start working again.