Item 19 - Overspeed Governor
Lubricate the overspeed governor, if it is equipped with a hinge-type cap oiler or oil cup, with 5 or 6 drops of engine oil
every 500 hours (15,000 miles). Avoid excessive lubrication and do not lubricate the governor while the engine is running.
Item 20 - Throttle Delay
Inspect and adjust, if necessary, every 30 months or 50,000 miles.
The throttle delay system limits the amount of fuel injected during acceleration by limiting the rate of injector rack
movement with a hydraulic cylinder. The initial location of this cylinder must be set with the proper gage to achieve the
appropriate time delay (Section 6).
Inspect the check valve by filling the throttle delay cylinder with diesel fuel and watching for valve leakage while moving the
throttle from the idle to the full-fuel position. If more than a drop of fuel oil leaks, replace the check valve.
Item 21 - Battery-Charging Alternator
Inspect the terminals for corrosion and loose connections and the wiring for frayed insulation.
Lubricate the battery-charging alternator bearings or bushings with 5 or 6 drops of engine oil at the hinge cap oiler every
200 hours (6,000 miles).
Some alternators have a built-in supply of grease, while others use sealed bearings. If these latter two cases, additional
lubrication is not necessary.
On alternators, the slip rings and brushes can be inspected through the end frame assembly. If the slip rings are dirty,
they should be cleaned with 400 grain or finer polishing cloth. Never use emery cloth to clean the slip rings. Hold the
polishing cloth against the slip rings with the alternator in operation and blow away all dust after the cleaning operation. If
the slip rings are rough or out of round, replace them.
Item 22 - Engine and Transmission Mounts
Check the engine and transmission mounting bolts and the condition of the mounting pads every 2000 hours (60,000
miles). Tighten and repair as necessary.
Check and record the crankcase pressure every 2000 hours (60,000 miles).