TM 9-6115-604-34
NAVFAC P8-633-34
6-23. ELECTRIC GOVERNOR SYSTEM TEST AND ADJUSTMENT.
NOTE
All tests referred to in this paragraph require that OPERATION SELECTOR SWITCH S3,
located on cabinet B door, be set to MANUAL, and that FREQUENCY SEL. SW. S118, located
inside cabinet A, be set to 60 HZ. Except where indicated, all tests are to be performed with
components to be tested installed and wired as during normal use.
WARNING
Hazardous voltages appear at terminals inside cabinet B during generator set operation.
Observe safety precautions applicable to maintenance on high voltage equipment. Failure to
do so may result in injury or death.
WARNING
High voltages and currents appear at load sharing panel A104 terminals 1 through 9. Observe
safety precautions applicable to maintenance of high voltage equipment Failure to do so may
result in injury or death.
a.
Electric Governor Control Unit See Figure 6-31.
(1)
Set 24 V dc CONTROL POWER CIRCUIT BREAKER CB1 to ON.
(2)
Using a multimeter set to 0 to 50 V dc scale, measure voltage from either of the two terminals identified as
F G H to terminal K.
(3)
Multimeter should indicate 10.1 V dc.
(4)
Using a multimeter set to 0 to 10 V dc scale, measure voltage from either of the two terminals identified as
F G H to terminal B.
(5)
Multimeter should indicate a maximum of 2.5 V dc.
(6)
Disconnect and tag wiring to fuel shutoff valve LI, located on the fuel injection pump.
(7)
While cranking the engine, the multimeter should indicate battery voltage.
(8)
Using a multimeter set to 0 to 10 V dc scale, measure voltage from either of the two terminals identified as
F G H to terminal N while cranking the engine.
(9)
Multimeter should indicate 8.5 to 9.5 V dc.
(10)
Using a multimeter set to 0 to 10 V dc scale, measure voltage from either of the two terminals identified as
F G H to terminal L while cranking the engine.
(11)
Multimeter should indicate more than 5.1 V dc.
(12)
Reconnect wiring as tagged to fuel shutoff solenoid L1, start the engine and operate at 1800 rpm and no
load.
(13)
Multimeter should indicate 5.1 V dc.
(14)
Disconnect and tag wiring to fuel shutoff valve L1.
(15)
Using a multimeter set to 0 to 10 V ac, measure voltage from either of the two terminals identified as F G
H to terminal S while cranking the engine.
(16)
Multimeter should indicate at least 1.0 V ac rms.
(17)
Replace an electric governor control unit which fails any of the tests described in steps (1) through (16),
above.
6-60
