3-61. FUEL PUMP FRONT COVER AND GOVERNOR REPAIR (Contd)
g. Disassembly (M915/Big Cam I)
Governor drive shaft (12)
a. Before removing, check drive
Drive shaft (12) has excessive wear
shaft (12) for excessive wear.
if it can be moved from side to side
in governor housing (14). Discard
governor housing (14) if there is
b. Check gear backlash between
Normal backlash is 0.005-0.009 in.
gear (9) and drive gear (26).
(0.127-0.228 mm). Discard collar
(13), gear (9), and drive gear (26)
if backlash is more than 0.009 in.
Governor drive assembly
snapring (11), ball key (30),
and collar (13)
Drive shaft (12)
Press on opposite gear end and
remove all units from housing (14).
Drive gear (2) and support
Remove from reservoir (21).
Remove drain plug, dipstick, vent
plug, and elbow.
Locknut (22) and washer (23)
Remove from shaft (31).
Coupling gear (24)
Press on small end of sham (31)
Use coupling puller (ST-1249).
to remove shaft from support (3)
and large end of shaft to remove
drive gear (26).
Spacers (25) and governor
drive gear (26)
Two keys (32)
Remove from shaft (31) keyways.
Snapring (27) and support
Remove and invert support and
press out rear bearing (28) and
oil seal (29).
h. Inspection (M915/Big Cam)
After disassembly, check bearing for worn race or rough action. Check gears for chipped,
broken teeth, or uneven wear. Inspect governor shaft housing oil holes to make certain they
are open and clear of foreign matter.
Support (3) and reservoir
Inspect for cracks, breaks, or
Replace all damaged, worn, or
rough mating surfaces.
defective parts as necessary.