Chevrolet 10 1971 Series Chassis Service Manual page 237

Fig. 3 G — Governor - Explode
1. Governor Housing
2. Diaphragm Assembly
3. Diaphragm Cover
4. Governor Lever
Fig. 2 G — Governor and Overspeed Warning
Light - Schematic
5. Governor Spring
6. Leather Seal
7. Leather Seal Retainer
8. Governor Cover
three governor attaching screws, then
5. Remove the
remove the leather seal retainer and leather seal.
6. Detach the governor housing from the throttle body.
7. The throttle lever and bearing assembly can be re­
moved by detaching the fast idle cam and pump rod
and removing the four attaching screws. No attempt
should be made to service the throttle lever bearing.
If the action indicates excessive friction to the point
that the throttle return spring cannot overcome
the binding, the throttle lever assembly should be
replaced.
Since the idle ports in the throttle
CAUTION:
body were drilled after the throttle body was
assembled, the throttle valves were nicked dur-
ing the drilling operation. No attempt should be
made to remove the throttle valve or to further
disassemble the throttle body, since any slight
change in positioning of the throttle valves with
relation to the idle ports would seriously disrupt
carburetor operation.
Cleaning and Inspection
The throttle lever and bearing assembly should not be
immersed in any carburetor cleaner, since it might cause
damage to the neophrene seal protecting the ball bear­
ings. If the throttle body itself is immersed in solvent,
great care must be taken that the throttle shaft bearings
are blown completely dry with compressed air. They may
then be lubricated with very light machine oil. Since the
calibration of vacuum versus spring tension is of extreme
importance in governor operation, it can readily be seen
ENGINE FUEL 6M-15
10-30 CHEVROLET TRUCK SERVICE MANUAL