TM 5-3810-300-24&P-3
3.4 BLOWER
pump drive coupling, then attach slide hammer and
shaft J 6471-1 to the adaptor and pull the drive
coupling from the blower rotor shaft
4.
Refer to Figs. 11 and 12 and remove the bolts (21),
lock washers and plain washers securing the blower
rotor drive hub (20) and drive hub plates (115) to
the blower rotor timing gear (13) or drive gear (140),
then remove the drive hub, plates and spacers
(116) (and bearing retainer (117) or former 71E,
71N and 71T blowers) from the gear. If necessary,
remove the three bolts (22), lock washers and plain
washers securing the drive plates to the drive hub.
5.
Remove the reduction drive gears (if used), and the
blower rotor timing gears as follows:
Fig. 5 - Removing Water Pump Drive Coupling Bolt from
a. Remove bolt, lock washer and retainer securing
Blower Rotor Shaft
the timing gear, or the reduction drive gear (if
2. On the current blower, loosen the seal clamp
used) to the right-hand helix rotor shaft. Then
securing the blower drive shaft cover to the blower
remove the bolt, lock washer and fuel pump
end plate cover, then remove cover, seal and clamp
coupling disc (18)securing the other timing
from the end plate cover. On the former blower,
gear, or the reduction driven gear (if used), to
remove the six bolts and seal washer assemblies
the left-hand helix rotor shaft. If used, slide the
securing the blower drive shaft cover to the blower
right-hand helix reduction drive gear with
end plate cover, then remove the cover and gasket.
bearing off the upper rotor shaft. Remove the
3. Remove the three bolts and seal washer assemblies
reduction driven gear from the lower rotor.
securing the fresh water pump to the blower front
b. Back out the center screw of both pullers J
end plate cover, then remove the water pump and
6270-1 and secure the pullers to the gears with
gasket. If necessary, tap the pump with a plastic
5/16"-24 x 1-1/2" bolts.
hammer to loosen it.
NOTE:
Both gears must be pulled from the rotor
4. Remove the six bolts and seal washer assemblies
shafts at the same time.
securing the governor weight housing to the blower
c. With the shop towels between the blower rotors
front end plate cover, then remove the weight
and housing to prevent them from turning, turn
housing and gasket.
the puller screws uniformly clockwise and pull
the gears from the rotor shafts (Fig. 6).
Disassemble Blower
Refer to Figs. 1, 2, 11 and 12 and disassemble the
blower as follows:
1. Remove the ten bolts and lock washers securing
the end plate covers (28) and (29) to the blower
front and rear end plates. Tap the ends of the end
plate covers with a plastic hammer to loosen the
covers from the gaskets and dowel pins in the end
plates. Then, remove the covers and gaskets from
the end plates.
2. Place a clean folded shop towel between the rotors
and a towel between the rotor and the housing to
Fig. 6 - Removing Blower Rotor Gears from Blower
prevent the rotors from turning. Then, remove the
Rotor Shafts
bolt securing the water pump drive coupling to the
blower rotor shaft as shown in Fig. 5.
3. Thread adaptor J 6471-4 (1/2"-20 threads) or
adaptor J 6471-10 (9/16"-18) into the water
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