TM 5-3810-300-24&P-3
1.7.6 BLOWER DRIVE GEAR
5. Press the gear hub out of the blower drive gear.
Inspection
Clean the parts with fuel oil and dry them with
compressed air. Ensure that the oil grooves, oil holes,
and cavities are free of dirt.
Replace the thrust washers if they are worn or. scored.
If the bearings are worn or scored excessively the drive
gear hub support or bearings will have to be replaced.
These bushing type bearings are diamond bored to an
inside diameter of 1.6260" to 1.6265", after installation in
the hub.
The clearance between the bearings and the hub is
Fig. 2 - Blower Drive Support Assembly
.0010" to .0025" with new parts and a maximum of
.0050" with used parts.
Before removing the blower drive gear, the blower drive
shaft must be removed as previously outlined.
The current bearing on the gear end protrudes .045" to
.055" above the surface of the face to facilitate the
1. Remove the blower as outlined in Section 3.4.
installation of the blower drive thrust
2. Remove the blower drive oil line (Fig. 3).
3. Straighten the ears on the lock washer (58) and
loosen the drive gear hub nut (57), Fig. 5.
4. Remove the blower drive support attaching bolts.
5. Loosen the blower drive support by tapping it lightly
and withdraw the support from the cylinder block rear
end plate. Take care to pre-vent damage to the
blower drive gear teeth. Discard the gasket.
Disassemble
Blower
Drive
Gear
and
Support
Assembly
1. Secure the blower drive gear and support assembly
in a vise with soft jaws.
2. Take out the drive coupling bolts (72) and re-move
the retainer (71) and coupling support (67), Fig. 5.
3. Remove the drive gear hub nut (57), lock washer
(58), lock ball (55) and thrust washer (56) and
Fig. 3 - Blower Drive Gear and Support
withdraw the blower drive gear hub.
Assembly Mounting
4. Remove the thrust washer (Fig. 2) from the blower
drive gear hub.
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