GMC 1976 ZEO 6083 Maintenance Manual page 127

determined that the frame is definitely out of align-
ment and is unable to be fixed by the usual frame
straightening operations .
FRONT FRAME EXTENSION REMOVAL
The front frame extension should only be re-
placed if absolutely necessary due to the complexity
and amount of labor involved .
Drain
NOTE :
To drain, disconnect, or remove certain
components it may be necessary to refer to addi-
tional sections in this maintenance manual (such
as, draining gas tanks; Refer to Section 8 "Fuel
Tank and Exhaust" .
1 . Drain power steering fluid.
2. Drain brake fluid .
3 . Release freon from A/C system .
4. Drain gas tanks .
5 . Drain engine cooling system .
Disconnect
1 . Fuel Filler hose at front elbow.
2. Hose from tube going to charcoal canister .
3 . If two canister are used, disconnect hoses from
the one mounted on the stepriser.
4. Rear brake line from combination valve.
5. Heater hoses and pre-heater at engine .
6. Vacuum lines at cruise control .
7. Power brake vacuum line .
8 . Hose to thermasan switch .
9 . Speedometer cable at cruise control (at trans-
mission without cruise control) .
10 . Accelerator cable at carburetor .
11 . Transmission shift cable at transmission .
12 . Oil filler tube at front end.
13 . Vacuum line at vacuum tank mounted on the
side of the heater .
14 . Brake lines at master cylinder.
15 . Hydraulic lines to windshield wiper motor.
16 . Air lines.
Remove
1 . Remove Engine Transmission and Final Drive
Assembly .
2 . Remove mufflers and Y-pipe.
FRAME
2- 3
3. Remove torsion bars and rear torsion bar sup-
port .
4. Take steering gear off of frame .
5. Remove batteries and battery box with air
tank .
6. Remove parking brake cable from front frame
section.
7. Remove thermasan hose from unit on exhaust
pipe (if used).
8. Remove front body mount bolts.
9 . Remove frame section bolts.
10 . Air conditioning compressor and hoses (cap
all A/C hoses) .
11 . Front wheels .
12 . Front fender wells.
13 . Grille .
14 . Lower fiberglass section below grille .
15 . Radiator .
16 . After the bolts holding the front frame exten-
sion are removed it will be possible to pull it forward
and down clearing the body . A high capacity floor
jack should be used to move the front frame exten-
sion forward and down .
FRONT FRAME EXTENSION
INSTALLATION
Installation of the front frame extension is ac-
complished by reversing the removal procedures .
NOTE:
The front frame extension to frame as-
sembly retaining nuts should be tightened to
50-60 foot-pounds torque .