Suburban 1/2 Ton 2WD V8-454 7.4L (1987)
Accumulator HVAC: Service and Repair
When removing an accumulator that will be reused, or when installing a new accumulator, ensure inlet and outlet openings of unit are
protected from exposure to the atmosphere. If openings are not sealed, moisture contamination will result, rendering unit inoperative. New
units are supplied with caps for this purpose, and plastic sheet and elastic bands may be used on units removed from vehicles.
C, K, G, R & V SERIES
Disconnect battery ground cable and compressor clutch connection. Discharge system refrigerant.
Disconnect inlet and outlet lines at accumulator. Plug all open connections.
Remove mounting bracket screws and accumulator.
Reverse procedure to install. If replacing accumulator with new unit, drain oil from old accumulator and measure. Add this amount of fresh
refrigerant oil plus 1 fluid ounce to new unit. Use new O-rings coated with clean refrigerant oil at connections.
ASTRO, SAFARI & S/T-10/15
Disconnect battery ground cable, then discharge system refrigerant.
Disconnect inlet and outlet lines. Plug open connections.
Remove accumulator mounting bracket screws and remove accumulator.
Reverse procedure to install. When installing new unit on vehicle, measure amount of oil present in old unit at time of removal. Add this amount
plus 2 fluid ounces of fresh 525 viscosity refrigerant oil to new unit prior to installation.