73-87 Chevy _ GMC Trucks > Heating, Ventilation & Air Conditioning (HVAC)

vacuum/ charge a/c system 1981 c10 truck

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kgross401:
I have a 1981 chevy c10 truck:
1st: a/c system not installed yet question on if i add pag oil to system then put system on vacuum will it suck out oil? where does the vacuum pump connect at?
2nd: orifice tube does it go on bottom tube of evaporator?
3rd: reading some stuff on internet different oz. range 35-50 for r134a how much is recommended

VileZambonie:
If you have flushed out the system, but aren't replacing the compressor, use ester oil instead. Charge oil after vacuuming the system. Orifice tube is at the bottom inlet of the Evaporator. Oil charge depends on what's already in the system.

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