TM 10-3950-672-24-2
Front Gear Housing and Gear Train
The gear train consists of the crankshaft gear, lube
pump gear idler and drive gear, the camshaft gear, the
fuel pump gear and the accessory drive gear, if used.
The gear housing provides a support for the injection
pump, the timing pin and the accessory drive gear, if
used.
Front Crankshaft Seal
The front crankshaft seal is mounted in the front gear
cover. A double lipped Teflon seal is used. The sealing
surface on the crankshaft must be clean and free of oil
during assembly.
Camshaft, Tappets and Push Rods
The camshaft is gear driven from the crankshaft. A
replaceable bushing is used for the front journal to carry
the side loading from the accessory drive.
The
remainder of the journals operate in cast iron bores in
the cylinder block; however, these bores can be repaired
in a machine shop by installing service bushings.
5-163