GMC 1976 ZEO 6083 Maintenance Manual page 83

1- 66 AIR CONDITIONING SYSTEM
sure that all of the failed portion is removed. If only
a very small portion of the hose was removed, it may
be possible to splice the two ends together, using a
special hose connector and two hose clamps . If sev-
eral inches of hose must be removed, a new piece of
hose should be spliced in using two connectors and
four hose clamps . Dip the ends of the hoses in clean
refrigeration oil before installing the hoses onto the
connector. Never push the end of the hose beyond
the locating bead of the connector. Torque the clamp
to 35-42 in . lbs.
NOTE: Be sure to replace the hose in the body in
the same manner as when removed. If the hose
protective grommets are badly mutilated, they
should be replaced .
4. Evacuate, charge and check the system .
COMPRESSOR
REMOVAL
1 . Purge the refrigerant from the system .
2. Remove engine cover to gain access to engine
components
3 . Remove connector attaching bolt and hose
connector (figure 32) . Seal connector outlets.
4. Disconnect electrical lead to clutch actuating
coil (figure 32).
5. Disconnect the hose holding clamp at the
clutch pulley shield .
6. Loosen brace and pivot bolts and detach belt .
Figure 32-Compressor Installation
7 . Remove the nuts and bolts attaching the com-
pressor brackets to the mounting bracket.
8. Remove compressor and attaching brackets
and shield by sliding rearward and dropping out bot-
tom. Be sure compressor is removed with attaching
brackets as shown in Figure 29 .
9. Before beginning any compressor disassembly,
drain and measure oil in the compressor . Check for
evidence of contamination to determine if remainder
of system requires servicing.
INSTALLATION
1 . If oil previously drained from the compressor
upon removal shows no evidence of contamination,
replace a like amount of fresh refrigeration oil into
the compressor before reinstallation . If it was neces-
sary to service the entire system because of excessive
contamination in the oil removed, install a full
charge of fresh refrigeration oil into the compressor.
2. Position compressor on the mounting bracket
and install all nuts, bolts and lock washers.
3. Install the connector assembly to the compres-
sor rear head, using new "O" rings coated with clean
refrigeration oil.
4. Connect the electrical lead to the coil and in-
stall and adjust compressor belt .
5. Evacuate, charge and check the system .
IMPORTANT : Adjust compressor belt, using belt
tension gauge BT-33-73-F or other suitable
gauge. Tension should be within 70-801bs . (used
belt), or 110-140 lbs. (new belt). For complete
Figure 33 -Compressor Removed From Vehicle