Fig. 3 - Removing Water Pump Drive Coupling Bolt
Fig. 4 Removing Blower Rotor Gears from Blower
from Blower Rotor Shaft
Rotor Shafts with Tool Set J 6270-F
4. Remove the six bolts and seal washer assembly
a. Remove bolt, lock washer and retainer securing
securing the governor weight housing to the blower front
the timing gear to the right-hand helix rotor
end plate cover, then remove the weight housing and
remove the bolt, lockwasher and fuel pump
coupling disc (18) securing the other timing gear
to the lefthand helix rotor shaft.
b. Back out the center screw of both pullers J
Refer to Figs. 1 and 7 and disassemble the blower as
627031 and secure the pullers to the timing
gears with 5/16"-24 x 1-1 /2" bolts.
1. Remove the ten bolts and lock washers securing the
NOTE: Both gears must be pulled
end plate covers (28) and (29) to the blower front and
from the rotor shafts at the same
rear end plates. Tap the ends of the end plate covers
with a plastic hammer to loosen the covers from the
c. With the shop towels between the blower rotors
gaskets and dowel pins in the end plates. Then, remove
and housing to prevent them from turning, turn
the covers and gaskets from the end plates.
the puller screws uniformly clockwise and pull
the gears from the rotor shafts (Fig. 4).
2. Place a clean folded cloth between the rotors to
d. Remove the shims from the rotor shafts or the
prevent the rotors from turning. Then, remove the bolt
inner face of the gears and note the number and
securing the water pump drive coupling to the blower
thickness of the shims used with each gear.
6. Remove the bolts and lock washers securing the
rotor shaft bearing retainers (6) to both the front and
3. Thread adaptor J 6471-4 (1/2"-20 threads) or adaptor
rear end plates. Remove the retainers.
J 6471-10 (9/16"-18) into the water pump drive coupling,
then attach slide hammer and shaft J 6471-1 to the
7. Remove the blower rear end plate and bearing
adaptor and pull the drive coupling from the blower rotor
assembly from the blower housing and rotors with the
two pullers J 6270-31 as follows:
4. Refer to Fig. 7 and remove the bolts (21), lock
washers and plain washers securing the blower rotor
a. Remove the two fillister head screws (26)
drive hub (20) and drive hub plates (115) to the blower
securing the rear end plate (24) to the blower
rotor timing gear (13). Remove the drive hub plates and
housing, and loosen the two fillister head screws
spacers (116) from the gear. If necessary, remove the
securing the front end plate (23) to the housing
three bolts (22), lock washers and plain washers
approximately three turns.
securing the drive plates to the drive hub.
b. Back out the center screws of the pullers far
enough to permit the flange of each puller to lay
5. Remove the blower rotor timing gears as follows:
flat on the face of the end plate.