Clean all parts in a well-ventilated
area. Avoid inhalation of solvent
fumes and prolonged exposure of
skin to cleaning solvent. Wash
cleaning solvent (Fed. Spec. P-D-
680) used to clean parts is potentially
property. Do not use near open
flame or excessive heat. Flash point
of solvent is 100 to 1380 F. (38 to 590
C). Clean all parts of the tumbler
blower using cleaning solvent (Fed.
Spec. P-D-680) and dry thoroughly.
Wipe the exterior surface of the
blower motor with a cloth dampened
in cleaning solvent (Fed. Spec. P-D-
Do not allow solvent to come in
contact with leads or to enter the
interior of the motor.
Inspect the housings, flange, motor,
and shutter for cracks, chips, deep scores, and other
accumulated foreign matter which would hamper air
A cracked housing, or flange can be
repaired by proper welding procedures.
A wire brush may be used to remove
accumulated matter from the filter screen.
Replace all missing or damaged
Secure the flange (17. fig. 3-10) to
the motor (18) by installing lockwashers 116) and bolts
Install the key (14) on the motor shaft.
Install the blower impeller (131 on the
motor shaft and secure by installing setscrews ( 121.
Install the coupling I11 on the motor
shaft and secure by installing setscrew I101.
Position the blower housing 19) on the
flange (17) and secure with lockwashers I(8 and bolts
Install the filter screen (6) and air
intake housing (5) onto the blower housing (9) and
secure with lockwashers (4) and bolts (3).
Install the shutter (2) on the air intake
housing (5), install thumbscrew 11), tighten to secure.
Installation. Refer to figure 3-9 and install
the tumbler blower and motor.
3-7. Tumbler Blower Motor
Removal. Refer to paragraph 3-6, figure 3-
10 and remove the blower motor from the blower.
Remove the bolts (1, fig. 3-11) and
remove the end cap (2).
Remove the armature unit from the
housing (3), (3) Remove the bearings (4 and 61 and
spring (51 from the armature (7) shaft.