ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320B0-MME-000
8-5. OVERHAUL OF GEARBOX ASSEMBLY.
(cont)
f. Reassembly.
WARNING
To prevent injury, ensure that
insulated gloves are worn when
handling dry ice and cold parts.
(1) Soak pinion spur gear (58,
figure 8-20) in dry ice and alcohol for
minimum of one hour.
Install gearbox
on
mount
fixture,
fabricated
tool
FT-21343.
See figure 8-l8.
CAUTION
To prevent damage, ensure that
annular bearings
are
correctly
installed.
CAUTION
To prevent damage, do not install
different styles of bearings on
the same shaft.
(2) Ensure that annular bearings
are positioned as shown in figure
8-23.
Exert pressure on inner race
only.
Use arbor press and fabricated
tool FT-21326 and install bearings (56)
and (57) on pinion spur gear.
(3) Lubricate shim (55), spring
washer (54), and pinion spur gear
assembly (53) with clean engine oil and
install in gearbox housing.
Use heat
gun to heat bearing bores if necessary.
(4) Position
bearing
retainer
(52) over pinion spur gear assembly.
Install washers (51) and bolts (50) in
8 o’clock and 12 o’clock positions.
Torque to 27-30 inch pounds (3.l-3.4
Nm).
(5) Install retainer ring (49)
into generator shouldered shaft (43).
WARNING
To prevent injury, ensure that
insulated gloves are worn when
handling dry ice and cold parts.
(6) Soak
generator
shouldered
shaft (43) in dry ice and alcohol for
minimum of one hour.
(7) Using
bearing
installation
tool,
fabricated tool
FT-21324,
and
arbor press,
install bearing (48) on
generator shouldered shaft.
(8) Place
generator
shouldered
shaft assembly in-dry ice and alcohol
while steps (9) thru (11) are performed.
(9) Lubricate output spur gear
(47) bearing (46), spring washer (42),
and shim (41) with clean engine oil.
(10) Insert
bearing
(46) into
bearing journal of gearbox housing.
(11) Remove gearbox from mount
fixture FT-21343.
Heat output spur
gear (47) in 300°F oven for 15 minutes.
Place gear on top of bearing (46).
(12) Place gearbox
housing on
assembly
fixture,
fabricated
tool
FT-21590.
(13) Remove generator shouldered
shaft
assembly
from
dry
ice
and
alcohol.
Place assembly into bearing
bore,
alining
splines
of generator
shouldered shaft with internal gears of
pinion spur gear.
8-54
