TM 5-4930-218-14
cloth dampened with dry cleaning solvent (fed. spec.
c. Cleaning and inspection.
P-D-680).
(1) Wipe the exterior of the starting motor with a
cloth dampened with dry cleaning solvent (fed. spec.
(2) Inspect the generator for cracks, broken ter-
P-D-680).
minals, signs of overheating, and other obvious
damage. Check the armature for rough, catching, or
(2) Inspect the starting motor for damaged
pinion teeth, signs of overheating, seizing of the ar-
binding rotation, Replace a defective generator.
mature shaft, or other damage. Replace the starting
(3) Inspect the generator drive belt for cracks,
motor if damaged or if it failed to meet the
brittleness, deterioration, fraying, glazing, and other
damage; replace a damaged belt.
requirements of the test given in subparagraph a
above.
d. Installation.
(1) Installation is the reverse of removal. Refer
d. Installation. Install the starting motor by revers-
to items 1 through 23, figure 4-4.
ing the removal procedure. Refer to items 36 and 37,
(2) After electrical connections are made to the
generator, it must be polarized to assure correct
Check that the starting motor cranks the engine
polarity of the output. To polarize the generator, use
when the STARTER switch on the control panel is
a jumper and momentarily flash the RET terminal to
pressed.
ground.
(3) Adjust drive belt tension per subparagraph a
above. After installation, start the engine and check
a. Generator Belt Tension Adjustment. TO provide
that the ammeter on the control panel indicates in
long generator drive belt life and to assure the
the charge range.
required generator output, maintain a generator
drive belt tension that allows the belt (18, fig. 4-4) to
be deflected one-half inch when thumb pressure is
applied at midpoint between pulleys. To adjust,
sors
loosen the nuts (9, 15, and 21) on the cap screws (8, 14,
a. Removal.
and 20) and adjust the position of the generator (23)
(1) Disconnect and tape the positive battery
to provide the required belt tension. Tighten the nuts
cable at the battery to prevent shorting of the elec-
on the cap screws while holding the generator in the
trical system when electrical leads are disconnected,
required position. Do not tighten the drive belt ex-
Tag and disconnect electrical leads to the oil pressure
cessively. This will cause premature generator
and temperature sensors (40, 41, and 43, fig. 4-4).
bearing failure.
(2) Use an open end wrench to remove the low oil
b. Removal.
pressure switch (40), oil pressure sender (41), and oil
CAUTION
temperature cutout switch (43).
Do not attempt to operate the engine
(3) Loosen the tube nuts and remove the oil
when the batteries are not connected
pressure tube (38) from the tee (42) and from the
to the generator.
manifold on the engine base (87).
(1) Disconnect and tape the positive battery
b. Cleaning and inspection.
cable at the batteries to prevent shorting of the elec-
(1) Clean the oil pressure and temperature sen-
trical system during generator removal. Tag and
sors with a cloth dampened with dry cleaning solvent
disconnect the generator electrical leads.
(fed. spec. P-D-680).
(2) Remove the belt guard attaching parts (1 thru
(2) Inspect the parts for cracks, damaged
6, fig, 4-4) and remove the belt guard (7).
threads, loose or corroded electrical terminals, Clean
(3) Loosen the nuts, (9, 15, and 21) on the cap
terminals with fine sandpaper.
screws (8, 14, and 20) and push the generator (23)
(3) Flush out the oil pressure tube to insure that
toward the engine as far as possible to decrease belt
it is not clogged. Check the tube for cracks, kinks,
tension. Remove the generator drive belt (18).
dents, and damaged threads; replace a damaged tube.
(4) Remove the generator attaching hardware
and remove the generator from the generator mount-
c. Installation. Installation of the oil pressure and
ing bracket (66).
temperature sensors is the reverse of removal. Refer
c. Cleaning and Inspection.
to figure 4-4. After installation, start the engine and
(1) Wipe the exterior of the generator with a
check for proper gage operation.
Section Xl. CONTROL PANEL
gages: fuel level gage (2, fig. 2-1), air pressure gage
4-27. General
a. The control panel provides a mounting for four
(4), engine oil pressure gage (1), and the ammeter (5).
