Chevrolet 70 1969 Series, Shop Manual

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RADIATOR AND SURGE TANK 13-2
3.
If vehicle is equipped with air conditioning
or power steering cooling coils, remove coils if
necessary.
4. If radiator assembly includes oil cooler in
its base, make provision for catching oil drainage
from cooler ports and lines. Disconnect all coolant
hoses and oil lines (if equipped) from radiator
core assembly.
5. If equipped with fan shroud, remove at­
taching bolts, then lay shroud back over fan blade.
6. Remove two bolts from radiator core upper
brace at radiator shell. Remove two bolts (if equip­
ped) from brace at radiator top tank. Remove up­
per brace and two rubber cushions (if equippedl.
7. Disconnect head light, parking light, and
ground wiring from radiator shell assembly.
8. Disconnect radiator upper and lower sup­
port brackets and strut rods from radiator shell.
9. Pull radiator shell assembly forward t:)
obtain additional clearance.
10. With the aid of an assistant, lift core as­
sembly up and out of vehicle.
Installation (Refer to Fig. 1)
1. Lower core assembly into position in vehicle.
2. Return shell to original position and connect
strut rods and upper and lower support brackets to
radiator shell assembly.
3 .
Install radiator core upper brace with two
rubber cushions (if equipped), and tighten attach­
ing bolts to 15 to 20 foot-pounds torque. Install
two bolts (if equipped) in brace at radiator top tank.
4. Install fan shroud (if equipped). Connect all
coolant hoses and oil lines (if equipped) to radiator
core assembly.
5. Install power steering or air conditioning
cooling coils (if removed].
6. Install hood assembly as instructed under
"Hood Assembly Replacement" in SHEET METAL
(SEC. 11) in this manual. Fill cooling system.
7. Connect head light, parking light and ground
wiring in original position and clip wiring to rad­
iator shell and hood.
8. On all models equipped with fan shroucl,
radiator should be aligned so that rear edge of fan
shroud is parallel with fan blade. On models with­
out fan shroud, radiator core is positioned parallel
with fan blade. If radiator is not correctly aligned
with fan, the necessary adjustment can be made
by shortening or lengthening the radiator support
strut rods.
NOTE: If strut rod adjustment is made, hood
alignment must be checked as instructed in SHEET
METAL (SEC. 11) of this manual.
MODELS HV, JV-70
Removal (Refer to Fig. 2)
1. Remove radiator shell assembly as de­
scribed under "Radiator Shell Replacement" in
S H E E T M E T A L (SEC. 11) of this manual.
2.
Drain radiator. Disconnect all coolant hoses
from radiator core assembly.
3. If vehicle is equipped with air conditioning
or power steering cooling coils, remove coils if
necessary.
4. Remove upper locknuts, washers, and cush­
ions from radiator support strut rods.
N O T E : Do not move lower lock nuts on rods.
5. At radiator core right trunnion frame rail
bracket, loosen jam nut and loosen take-up screw.
6. With assistant supporting radiator, remove
two bolts attaching each trunnion mounting bracket
to frame. Raise core slightly, then remove trun­
nion brackets with rubber insulators. Carefully
lift radiator core assembly from vehicle.
Installation (Refer to Fig.
2)
1. Carefully support radiator assembly in
position. Install trunnion brackets with rubber in­
sulators and steel washer (right side bracket only)
to core trunnions. Attach each bracket to frame
rail with two bolts, washers and nuts. Torque nuts
to 40 to 50 foot-pounds torque.
2.
Take-up screw located in right trunnion
mounting bracket is used to eliminate transverse
movement of radiator core assembly. Tilt radiator
core assembly while tightening take-up screw until
side movement is eliminated. Tighten jam nut.
3. Install upper cushions, washers, and lock
nuts on radiator support strut rods. Tighten lock
nuts until a dimension of 1-7/8 inches is obtained
between outer edges of flat washers as shown in
figure 2.
4. Install air conditioning or power steering
cooling coils (if removed).
5. Connect all coolant hoses to core assembly.
6. Install radiator shell assembly as described
under "Radiator Shell Replacement" in "S H E E T
M E T A L " (S E C .11) of this manual.
T IL T C A B M O D E L S
Removal (Refer to Fig. 4)
1. Drain radiator.
2.
Disconnect throttle linkage at linkage brac­
ket on radiator support.
3. Remove electrical components from rad­
iator support assembly.
4. Disconnect upper and lower coolant hoses
from radiator.
5. If vehicle is equipped with air conditioning
or power steering cooling coils, remove coils if
necessary.
6. On TM-80 Models, remove nuts, washers
and spring from lower mount.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L