M2/M3 BFV ENGINE STARTING/CHARGING SYS - OD1603 - LESSON 1/TASK 1
plug (1)(figure 5 on the previous page) from the generator (2) by unscrewing the
coupling (3), and pulling on the plug.
Align the mark (4) on the plug (1) with the 27V position shown on the
instruction plate (5), push the plug into its recess on the generator (2), and
tighten the coupling (3) using electrical pliers.
At this time, the power unit would be closed and secured and the trim
vane would be raised and secured. This procedure is not required for this lesson.
It is found in TM 9-2350-252-10-1.
TURN THE ENGINE AT THE NORMAL CRANKING SPEED. The following is a typical procedure
that unit maintenance personnel would follow in troubleshooting and fault isolating
Move the MASTER POWER switch to the ON position.
At this time, the
volt gage indicator should be pointing either to the yellow or green zone.
Since the volt gage indicator is in the yellow zone, move the ENGINE
ACCESSORY switch to the ON position.
Also move the GEAR SELECTOR to the START
position for 5 seconds and release. The starter should have cranked the engine.
If the starter did not turn the engine, move the ENGINE ACCESSORY
switch to the OFF position. Also move the MASTER SWITCH to the OFF position. Then
connect the STE-M1/FVS (VTM only) to the distribution box by installing plug W1P2
to jack 1A1J14 (DCA3). Perform test number 90 - STARTER CURRENT DRAW. The test
did not exceed 450 amperes.
Since Test Number 90 did not exceed 450 amperes, move the MASTER POWER
switch (1)(figure 1 on page 8) and the ENGINE ACCESSORY switch (3) to the ON
position, and the GEAR SELECTOR (4) to the START position for five seconds and
release. The starter did turn, but not at the normal speed.
Because the starter does not turn at the normal speed at step 4 when
activating the GEAR SELECTOR lever, move the STARTER CUTOUT OVERRIDE