ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
4-51.
MAINTENANCE OF ELECTRONIC SPEED CONTROL. The electronic speed control is one of three
components located on load sharing panel A104 inside engine control cabinet B. The electronic speed control receives a
signal from the magnetic pickup located on the engine flywheel housing; it then operates the actuators located on the
engine fuel pump, in response to changes in engine speed.
Do not touch exposed electrical connections when circuits are energized. DO
CONTROL and UTILITY POWER CIRCUIT BREAKERS must be deenergized and
MAINTENANCE LOCKOUT switch S100 set to MAINTENANCE before starting any
process QUIT.
Inspect the electronic speed control (Figure 2-6) on the upper rear wall inside engine control cabinet B, for security of
wiring connections and signs of damage.
4 52.
MAINTENANCE OF THE ETHER INJECTION ASSEMBLY. The ether kit contains a solenoid actuated ether
tank to feed ether into the engine intake manifold for cold weather starting. It Is mounted on the righthand center support
frame of the generator set.
a.
Test.
Do not perform test on a hot engine. Ether is highly flammable, explosive, and
mildly toxic to the akin, eyes, and respiratory tract. Use in an adequately
ventilated area skin eye. and respiratory protection is required to avoid injury to
personnel.
(1)
Use soap and water solution and look for bubbles at solenoid valve assembly L5 (7, Figure 3-1 5),
and at ail lines and fittings which would indicate a leakage in the ether injections assembly. Leakage
may also be indicated if a distinct odor of ether is detected.
(2)
Remove ether start tank (1 ). Install replacement tank.
(3)
Jumper the two terminals of ether lockout temperature switch S17 mounted on the right thermostat
housing on the engine block. See figure 3-3.
(4)
Toggle START AID switch S10 (See figure 2-13) to the ON position with ether injection lines
disconnected from engine.
(5)
Check ether solenoid valve assembly L5 (7) for 24 V dc using a voltmeter. Listen for the sound of
the coil energizing. Check for passage of gas through valve.
(6)
Replace solenoid valve assembly L5 (7) if it falls testing as described above. Reconnect ether
injection lines to engine.
b.
Remove.
(1)
Remove ether line tubes (4, figure 3-15) from compression tee (6). Remove ether start tank (1) by
loosening cylinder clamp (3).
(2)
Disconnect compression tee (6) and receptacle connector J9 (8) from 24 volt solenoid valve
assembly L5 (7). Remove solenoid valve assembly L5 by removing hexagon head capscrews (9)
and bracket (10).
(3)
Remove ether line tubes (5) from engine fuel atomizers (11 ) and tee (12). Remove engine fuel
atomizers (11 ).
4-110
