sufficiently to require replacement, both
Then start the carrier straight over
gears must be replaced as a set.
the end of the rotor shaft with the
chamfered inside diameter end facing
Check the blower drive shaft serrations
the rotor.
for wear or peening. Replace the shaft
if it is bent.
C. Place the oil seal ring carrier installer
J 6270-4 over the end of the rotor
Inspect
the
blower
drive
coupling
shaft and against the carrier with the
springs (pack) and cam for wear.
end of the installer under the ram of
the press.
Then press the carrier
Replace all worn or excessively damaged
down tight against the rotor.
blower parts.
D. Install the remaining oil seal ring car-
riers on the rotor shafts in the same
Assemble Blower
manner.
The lobes on the upper blower rotor and
the teeth on its gear form a right hand
helix while the lobes and teeth of the
lower blower rotor and gear form a left
To avoid breaking the oil seal
hand helix.
Therefore, a rotor with a
rings, do not spread them more
right hand helix lobe must be used with
t h a n ne c e s s a r y t o pl a c e t h e m ov e r
a gear having a right hand helix teeth
t h e end of the carrier.
and vice versa (see Figure 11D-12).
E. Support one of the blower end plates,
inner face up, on wood blocks on the
bed of an arbor press as shown in
F i g u r e 11D-12. Upper and Lower
R o t o r s and Gears
With this precaution in mind, proceed
with blower assembly.
1. Install the ring type oil seal, carriers
Installing Seal Ring
and collars on the rotor shafts and in the
Collar
end plates as follows:
F. Lubricate the outside diameter of a
A. Support one of the rotor assemblies
seal ring collar with engine oil. Then
on wood blocks on the bed of an arbor
start the chamfered outside diameter
press as shown in Figure 11D-14 on
end of the collar straight into the
page 11D-10.
bore in the end plate.
B. Lubricate the inside diameter of the
oil seal ring carrier with engine oil.
Air Intake System
