Chevrolet 10 Series 1970 Service Manual page 58

HEATER AND AIR CONDITIONING 1A-28
3. Cut out the leaking portion of the hose, making sure
that a ll o f the fa ile d portion is rem oved.
v e r y sm all portion of the hose was rem oved, it may
be p ossib le to sp lice the two ends together using a
special hose connector and two hose clam ps.
se v e ra l inches o f hose must be rem oved, a new piece
of hose should be sp liced in using two connectors and
four hose clam ps. Dip the ends of the hoses in clean
re frig e r a tio n o il b efore installing the hoses onto the
connector. N e v e r push the end o f the hose beyond
the locating bead o f the connector.
to 35-42 in. lbs.
CA UTIO N: Be sure to rep la ce the hose in the
body in the sam e manner as when rem oved.
the hose p ro te c tiv e g rom m ets are badly muti­
lated, they should be replaced.
4. Evacuate, charge and check the system .
G M Chevrolet System
Th is system makes use o f individual hoses, attached at
eith er end by hose clam ps.
en tire hose should be replaced.
COMPRESSOR
Removal (Fig. 35 )
1. Purge the r e frig e ra n t fr o m the system .
2. Rem ove connector attaching bolt and connector. Seal
connector outlets.
3. D isconnect e le c tr ic a l lead to clutch actuating coil.
4. Loosen b race and p ivot bolts and detach belt.
5. Rem ove the nuts and bolts attaching the com p ressor
brackets to the mounting bracket.
6. B efo re beginning any com p resso r disassem bly, drain
and m easure o il in the com p ressor.
evidence o f contamination to determ ine if rem ain der
o f system req u ires serv ic in g .
ing inform ation is located in the Chassis Overhaul
Manual.
Installation
1. If o il p revio u sly drained fro m the com p ressor upon
rem o val shows no evidence o f contamination, replace
a lik e amount o f fre s h r e frig e ra tio n o il into the com ­
p re s s o r b efore reinstallation .
to s e rv ic e the entire system because of e x c essive
contamination in the
charge o f fre s h re fr ig e r a tio n o il in the com p ressor.
2. P osition com p ressor on the mounting bracket and
in stall a ll nuts, bolts and lock w ashers.
3. Install the connector assem bly to the co m p ressor
re a r head, using new "O " rings coated with clean
re frig e ra tio n o il.
4. Connect the e le c tr ic a l lead to the c o il and in stall
and adjust co m p ressor belt.
5. Evacuate and charge the system .
6. Leak test the system and check fo r p rop er operation.
Compressor Belt Tension Adjustm ent
Adjust the com p ressor belt to the sp ecification s shown
in the Tune-Up chart in the Engine Specification section
o f this manual.
If only a
Torque the clamp
If
In case of a fa ile d hose, the
Check fo r
C om p ressor s e r v ic ­
If it was n ecessary
o il rem oved, in stall a full
If
4 0 - 6 0 SERIES
F ig . 3 6 —C ondenser and R e c e iv e r-D e h y d ra fo r
CONDENSER (Fig. 3 6)
1 0 -3 0 Series
Removal
1. Pu rge the system of re frig e ra n t.
2. Disconnect the re frig e ra n t lin es at the condenser and
cap them.
3. Rem ove the hood catch assem bly.
shroud mounting screw s.
4. R em ove radiator mounting bolts and push top o f ra d i­
ator back enough to make low er condenser mounting
nuts a ccessib le by reaching down between radiator
and radiator support.
5. R em ove condenser attaching bolts and rem ove con­
denser (cap the condenser inlet and outlet if it is to
be reused).
Installation
1. L ow er the replacem ent condenser into position and
replace mounting bolts.
stalled at lo w e r condenser mount bolts.
R em ove low er
Be certain shim s are in­
CHEVROLET TRUCK SERVICE MANUAL