P-8-627-34
T O 35C2-3-442-2
TM 5-6115-457-34
TM-07464A-35
10. Install remaining screws (9,
edges only. Clean shaft couplings with
and washers (10). Tighten screws evenly.
an approved cleaning solvent and dry
Torque screws to 75 foot-pounds.
thoroughly.
5. Install two suitable wooden
CAUTION
blocks, 180 degrees apart, between gen-
erator frame and fan to prevent main rotor
Do not lower generator on mount-
assembly from sliding out of frame during
ing bolts; weight of generator on
installation.
bolts may damage fuel tank.
6. Connect a suitable overhead lift-
11. Simultaneously lower engine and
ing device to both generator lifting eyebolts.
generator using overhead lifting device
WARNING
engine support bolts until generator mounts
are just above generator mounting bolts.
Stay clear of generator during
12. Push generator toward radiator
lifting.
until generator mount holes are in align-
ment with mounting bolts. Push mounting
7. Position generator against fly-
bolts up through generator mounting holes
wheel housing and secure generator with
and install washer (8) and nuts (7). Lower
two screws (9) and washers (10), 180 de-
engine and generator onto skid base.
grees apart.
Remove overhead lifting device and tighten
engine support bolt lock nuts. Hold gen-
8. Remove wooden blocks from gen-
erator mounting bolts stationary and tighten
erator frame. Rotate engine crankshaft
nuts (7) to 600 foot-pounds torque.
using a suitable barring tool on engine
crankshaft pulley bolt to align flywheel
NOTE
generator shaft coupling holes with holes in
shaft couplings. Turn engine clockwise
(standing in front of engine looking toward
Generator air gap should be 0.125
g e n e r a t o r ) . After holes are aligned, push
inch for 50/60 hertz generators
and 0.049 inch for 400 hertz gen-
generator shaft couplings against engine
erators.
flywheel, making sure couplings are inside
of flywheel recess.
13. Check generator air gap using
NOTE
three plastic gauges approximately one foot
long. Equally space gauges and insert
Rotate engine crankshaft as re-
gauges through opening between generator
frame and fan. Position gauges between
quired to gain access to screws.
main stator and main rotor, making sure
9. Position generator fan on rear of
gauges are positioned on high points
shaft couplings and install locking plates (6)
of stator pole splices. Hold gauges
and screws (5). Tighten screws evenly in
stationary and rotate engine and gen-
erator approximately three revolutions
a criss-cross pattern. Torque screws to
150 foot-pounds . Bend corners of locking
by turning engine crankshaft. Remove
plates (6) against screws (5) to prevent
and inspect gauges. Gauges should
screws from turning.
not show any signs of interference. If
2-10
Change 8
