Timing Components: Testing and Inspection

FRONT GEAR HOUSING COVER AND GEAR TRAIN





Troubleshooting the front gear housing cover and gear train consists of:

^ Checking for leaks at the front cover, timing pin assembly, injection pump and the front crankshaft oil seal.
^ Inspecting the gears and measuring backlash when required.





A vibration damper is located on the front of the engine crankshaft. When diagnosing a vibration problem, check the damper for visible wobble when rotating.

Verify that the index lines (A) are aligned. If the lines are more than 1 .59mm ti/i 6 inch] out of alignment, replace the damper.

Inspect the rubber member (B) for deterioration and missing pieces.





As previously discussed in the fuel system, replacement of the gear housing or the timing pin assembly necessitates a realignment of the pin assembly. The pin must be aligned to correspond to TDC for Cylinder Number 1.