TM 5-4320-300-14
6-4. BLOWER ASSEMBLY (CONT)
Location/item
Action
Remarks
18.
Rotor assem-
Position rotor assem-
bly adjustment
blies so that missing
splines on gear end of
shafts are 90 degrees
apart.
19. Gear shims
Install in counterbore in face of blower drive
and spacers
gears.
20. Blower
Install on shafts with missing
drive gears
gear splines in line with miss-
ing splines on shafts. Tap gears lightly to seat
them on shafts. Rotate gears until matchmarks
on gear faces aline. Reposition gears if
necessary. Wedge a clean cloth between rotor
assemblies. Install bolts and plain washers. Turn
bolts uniformly until gears are tight against
shoulders on shafts. Remove bolts and plain
washers. Install bolts with gear washers. Torque
bolts to 25 to 30 ft lb (34 to 41 N.m).
FINAL
INSPECTION
21. Blower drive
Check backlash between gears with dial indicator.
gear backlash
Backlash should be between 0.0005 and 0.0025
inch (0.0127 and 0.0635 mm) with new gears, or
a maximum of 0.0035 inch (0.0889 mm) with
used gears. Replace gears if necessary.
6-10
