ENGINEMAN 1 & C
Table 3-1.Troubleshooting Chart-Governor
Trouble
Probable Cause
Corrective Action
Engine hunts or surges
Compensating needle valve ad-
justment incorrect
Dirty oil in governor
Make needle valve adjust-
ment; ensure that the op-
posite needle valve is closed
Drain oil; flush governor;
refill
Low oil level
Fill to correct level with clean
oil
Foamy oil in governor
Lost motion in engine governor
linkage or fuel pumps
Drain oil; refill
Repair linkage and realign
pumps
Governor worn or incorrectly
adjusted
Engine misfiring
External fuel linkage sticking or
binding
Remove governor and make
internal
checks
for
clearances according to ap-
plicable instructions
Test and replace injectors
Disconnect fuel rack from
governor and manually
move linkage and pro-
gressively disconnect fuel
pump links until binding
area is found (dirt, paint,
and misalignment are the
usual causes of binding)
Governor rod end jiggles
Rough engine drive
Check alignment of gears;
inspect for rough gear teeth;
check backlash of gear
Governor base not bolted down
evenly
Loosen bolts; realign and
secure
every precaution should be taken to prevent the
oil from becoming contaminated. Most hydraulic
governors use the same type of oil that is used in
the engine crankcase, provided it is absolutely
clean and does not foam. You should change the
oil in the governor at regular intervals, depending
upon the type of operation, and at least every six
months regardless of the operation. You must
ensure that the containers used to fill the
governors with oil are clean, and that only clean,
new, or filtered oil is being used. You should also
check the oil level frequently to ensure the proper
level is maintained and that the oil does not
foam. Foaming of the oil is usually an indication
that water is present in the oil. Water in the oil will
cause serious damage to the governor. After
installing a new governor or one that has been
overhauled, adjust the governor compensating
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