TM 10-3950-672-24-2
Front Gear Housing and Gear Train
Troubleshooting the front gear housing and gear train
consists of checking for leaks at the gaskets (front
cover, timing pin assembly and injection pump) and the
front crankshaft oil seal, inspecting the gears and
measuring backlash when required.
Gear noise emitted from the cover can indicate worn
gear teeth (refer to page 8-43).
Note: Excessive backlash can affect
engine
timing
and
engine
performance.
As previously discussed in the fuel system, replacement
of the gear housing or the timing pin assembly
necessitates a realignment of the pin assembly on the
housing to correspond to TDC for Cylinder Number 1
(refer to page 5-211 for replacement instructions).
5-175