5-8. BLOWER - MAINTENANCE INSTRUCTIONS (Continued).
g. Inspect the inside surface of the
blower housing for burrs and scoring.
The inside surface must be smooth
for efficient operation of the
blower. If the inside surface of
the housing is slightly scored or
burred, it may be cleaned up with
h. Check the finished ends of the
blower housing for flatness and
burrs. The end plates must set flat
against the blower housing.
The finished inside face of each end
plate must be smooth and flat. If
the finished face is slightly scored
or burred, it may be cleaned up with
Examine the serrations in the blower
timing gears for wear and peening;
also check the teeth for wear,
chipping or damage. If the gears
are worn to the point where the
backlash between the gear teeth
exceeds .004", or damaged sufficiently
to require replacement, both bearings
must be replaced as a set.
Check the blower drive shaft serra-
tions for wear or peening. Replace
the shaft if it is bent.
Inspect the blower drive coupling
springs (pack) and the cam for
m. Replace all worn or excessively
damaged blower parts.
n. Clean the oil strainer in the verti-
cal oil passage at the bottom of
each blower end plate and blow out
all oil passages with compressed air.