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TM5-4210-229-14&P
6-10. TIMING AND GEAR TRAIN MAINTENANCE (Continued).
REMOVAL
NOTE
Prior to removal of any individual gear,
check
the backlash between each set of gears.
a. Attach a dial indicator to the crankcase at a suit-
able location.
b. Insert the end of the indicator between any two
teeth of the gear to be measured.
c. Move the gear by hand, slightly, then read dial
indicator to determine backlash.
NOTE
Backlash between any set of timing gears
should not exceed 0.01 6 inch (0.41 mm). Any
gear exceeding this value requires service.
d. Idler gear removal.
(1) Remove the retainer bolt (1), stub shaft (2),
and bearing (3). A split ring prevents the
bearing (3) from coming off the stub shaft
(2).
(2) Remove idler gear (4), bearing (5), and spacer
(6).
e. Injection pump drive gear removal.
(1) Remove three drive gear bolts (7)
(2) Remove injection pump drive gear (8) from
the dowel.
INSPECTION
Cleaning solvent (Appendix D, Item 54) is both
toxic and flammable. Keep off skin. Use only
in a well ventilated area and avoid prolonged
breathing of vapors. Keep away from open
flames.
a. Clean all parts in solvent (Appendix D, Item 54)
Compressed air used for cleaning or drying can
create airborne particles that may enter the eyes.
Pressure shall not exceed 30 psi (206 kPa).
Wearing of goggles is required to avoid injury to
personnel.
6-21
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