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 TM 55-1905-220-14-6
3-144. BLOWER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (Cont)
d. Rotor
Loose rotor shafts or
To correct any
shaft
damaged bearings will
of the above
cause rubbing and scor-
conditions, re-
ing between the crowns
move the blower
of the rotor lobes and
from the engine
the mating rotor roots,
and replace it.
between the rotors and
the end plates, or be-
tween the rotors and
the housing. Generally,
a combination of these
conditions exist. A
loose shaft usually
causes rubbing between
the rotors and the end
plates. Worn or dam-
aged bearings will
cause rubbing between
the mating rotor lobes
at some point or perhaps
allow the rotor assem-
blies to rub the blower
housing. This condition
will usually show up at
the end where the bear-
ings have failed. Ex-
cessive backlash between
the blower timing gears
usually results in the
rotor lobes rubbing thru-
out their entire length.
e. Blower
Inspect the blower inlet
To correct any
screen
screen periodically for
of the above
an accumulation of dirt
conditions, re-
which, after prolonged
move the blower
operation, may affect
from the engine
the air flow.
and replace it.
3-2438
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