TROUBLESHOOTING
TESTING AND ADJUSTING
TROUBLESHOOTING
Troubleshooting can be difficult. On the following pages there is a list of possible problems. To make a
repair to a problem, make reference to the cause and correction.
This list of problems, causes, and corrections, will only give an indication of where a possible problem
can be, and what repairs are needed. Normally, more or other repair work is needed beyond the
recommendations in the list. Remember that a problem is not normally caused only by one part, but by
the relation of one part with other parts. This list can not give all possible problems and corrections. The
serviceman must find the problem and its source, then make the necessary repairs.
Item
Problem
I.
Contactor Switch for Water Temperature Does Not
Activate Shutoff Solenoid.
2
Contactor Switch for Water Temperature Activates
Shutoff Solenoid at Wrong Temperature.
3.
Contactor Switch for Oil Pressure Fails to Activate
Shutoff Solenoid.
4.
Shutoff Solenoid Fails to Stop Engine.
5.
Shutoff Solenoid Prevents Engine Start.
6.
Mechanical Shutoff Fails To Stop Engine Because
Of Low Oil Pressure.
7.
Mechanical Shutoff Does Not Stop Engine When
Coolant Temperature Is Too High.
8.
Mechanical Shutoff Will Not Let Engine Start.
9.
Electrical Gauges Give Wrong Readings.
Item
Problem
10. PSG Governors.
a.
Engine Speed Does Not Have Stability.
b.
Vibration At Governor Output Shaft.
c.
Fuel Control Response When The Engine Is
Started Is Not Acceptable.
d.
Engine Has Slow Response To A Change In
Speed Setting Or Load.
e.
No Output From Governor.
f.
Engine Will Not Drive Full Rated Load.
g.
Load Sharing Between Paralleled Units Is Not
Correct (One unit on zero droop all others on
droop).
h.
Load Sharing Between Paralleled Units Is Not
Correct (all units on droop).
11. Automatic Start/Stop Systems.
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