TM 5-3810-300-24&P-3
3.4 BLOWER
i.
Refer to Fig. 8 and support the outer face of
the blower end plate on wood blocks on the bed
of an arbor press.
j.
Place the long end of the oil seal remover and
installer J 6270-3 down through the oil seal ring
collar and into the bearing, with NW the
opposite end of the remover under the ram of
the press (Fig. 8). Then, press the bearing and
oil seal ring collar out of the end plate.
k.
Remove the remaining bearings and oil seal
ring collars from the end plates in the same
manner.
Fig. 9 - Removing Oil Seal Ring from Carrier
Inspection
pair of snap ring pliers J 4880 as shown in Fig. 9.
Wash all of the blower parts in clean fuel oil and dry
them with compressed air.
d. Refer to Fig. 10 and place the seal ring carrier
remover adaptor J 6270-2 over the carrier. Make sure
Examine the bearings for any indications of corrosion or
the adaptor is seated in the groove of the carrier.
pitting. Lubricate each bearing with light engine oil; then,
while holding the bearing inner race from turning, revolve
e. Back out the center screw of puller J 6270- 1 far
the outer race slowly by hand and check for rough spots.
enough to permit the puller flange to lay flat against the
adaptor J 6270-2.
The double-row ball bearings are pre-loaded and have
no end play. A new double-row bearing will ILI seem to
f. Place the puller over the end of the rotor shaft
have considerable resistance to motion when revolved
and against the adaptor on the oil seal ring carrier.
by hand.
Then, secure the puller to the adaptor with two bolts.
Check the oil seal rings, carriers and collars for wear and
g. Turn the puller screw clockwise and pull the oil
scoring. If worn excessively, they must be replaced.
seal ring carrier from the rotor shaft (Fig. 10).
Inspection of the lip type oil seal is covered in item "a"
under Step 10.
h. Remove the remaining oil seal ring carriers
from the rotor shafts in the same manner.
NOTE: When a blower with lip type oil seals is being
reconditioned, the
installation of new seals is recommended. Oversize oil
seals and oil seal spacers are available in the blower kit
to replace the standard oil seals where the blower rotor
shafts are grooved.
Inspect the blower rotor lobes, especially the sealing ribs,
for burrs and scoring. Rotors must be smooth for
efficient operation of the blower. If he rotors are slightly
scored or burred, they may be cleaned up with emery
Fig. 10 - Removing Oil Seal Ring Carrier from Blower
cloth.
Rotor Shaft
Examine the rotor shaft serrat onus for wear, burrs, or
peening. Also, inspect the bearing and oil seal contact
surfaces of the shafts for wear and scoring.
Inspect the inside surface of the blower housing for burrs
and scoring The inside surface must he
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