The timing gear train is accessible when crankcase front cover is off. All gears are driven by the crankshaft gear.
Gears provide a positive and accurate drive to camshaft, lubricating oil and water pump, injection pump, fan drive,
and hydraulic pump. The only timing marks in gear train are between crankshaft, camshaft, and injection pump
gears. The injection pump is timed to the engine through the injection pump adapter. Refer to WP 0028, Fuel
Injection Pump Replacement and Timing, for detailed information on injection pump timing. Two lubricating oil jets
and an oil slinger provide lubrication for all gears.
Figure 4. Gear Train.