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 TM 55-1905-220-14-10
5-35. BLOWER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL - DISASSEMBLY (Cont)
5. Blower
WARNING
Wear eye protection when using compressed air.
a. Wash all of the blower parts in clean fuel oil and dry them
with compressed air.
b. Examine the bearings for any indications of corrosion or pit-
ting. Lubricate each bearing with light engine oil; then,
while holding the bearing inner race from turning, revolve the
outer race slowly by hand and check for rough spots.
c. The double-row ball bearings are pre-loaded and have no end
play. A new double-row bearing will seem to have consider-
able resistance to motion when revolved by hand.
d. Check the oil seal rings, carriers and collars for wear and
scoring. If worn excessively, they must be replaced. Inspec-
tion of the lip type oil seal is covered in item step 4n.
e. Inspect the blower rotor lobes, especially the sealing ribs,
for burrs and scoring. Rotors must be smooth for efficient
operation of the blower. If the rotors are slightly scored
or burred, they may be cleaned up with emery cloth.
f.
Examine the rotor shaft serrations for wear, burrs or peening.
Also, inspect the bearing and oil seal contact surfaces of the
shafts for wear and scoring.
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 hous-
ing is slightly scored or burred, it may be cleaned up with
emery cloth.
h. Check the finished ends of the blower housing for flatness and
burrs. The end plates must set flat against the blower housing.
i.
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 emery cloth.
5-570
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