Rear Head Details; Mounting View - Chevrolet 1991 Light Duty Truck Repair Manual

1B2-2 V-5 AIR CONDITIONING COMPRESSOR
removal of the compressor. The parts must be kept
clean at all times and any parts to be reassembled
should be cleaned with Trichlorethane, naptha, Stod­
dard solvent, kerosene or equivalent solvent and dried
with dry air. Use only lint free cloths to wipe parts.
Up to 118 ml (4 fl.oz.) of oil can collect in the crank­
case. Therefore, it is important when replacing a com­
pressor that the oil in the old compressor crankcase be
drained through the drain plug and measured (discard
after recording amount) (figure 2).
All replacement compressors will be shipped with
236 ml (8 fl.oz.) of oil in the crankcase. The oil must be
drained and retained. Then replace the oil in the same
amount as previously recorded from the old compres­
sor. Refer to "Specifications."
Although certain service operations can be per­
formed without removing the compressor from the vehi­
cle, the operations described here are based on bench
repair with the compressor removed from the vehicle.
They have been prepared in sequence in order of
accessibility of the components (figure 3).
IDENTIFICATION
An identification label attached to the compressor
provides the name of the manufacturer, model number
and build code. If the label is removed or becomes
dislodged during service operation, reattach it using an
adhesive sealant such as Loctite 312 or equivalent.
1. Clutch Coil Terminals
2. High Pressure Relief Valve
3. High Side Low Pressure Switch
4. High Side Cut-Off Switch
5. Compressor Control Valve
Figure 1—Rear Head Details
Figure 2—Mounting View
F4535