Fig. 6. Inserting Blower Drive Cam
Fig. 7. Relation of Blower Drive Cam to Oil Grooves
in Gear Hub
c. Apply engine oil to the drive coupling springs
(there are 21 leaves in each spring pack) and
drive gear support assembly. The clearance must be
insert them in the coupling support.
.006" to .014".
d. Place the blower drive cam (68) on the installer
Place a new gasket (63) on the mounting face of
J 1471, insert the round end of the tool between
the spring packs (69) and press the cam into
Attach the blower drive gear and support
assembly to the cylinder block rear end plate with the
Place the coupling support against the drive gear
two 3/8"-24 x 7/8 bolts.
with the blower drive shaft ring groove in the cam facing
away from the drive gear. Then, place the drive
coupling retainer (71) against the coupling support with
the flared edge away from the support. Revolve the
coupling assembly on the hub flange until the cam lobes
and secure the seal (61) and clamp (52) shown in Fig.
are in line with the oil grooves in the gear hub (Fig. 7)
to ensure proper lubrication.
Insert the blower drive shaft into the blower rotor
Install the drive coupling bolts.
gear hub. The end without the groove for the ring must
be inserted first.
Install Blower Drive Gear and Support Assembly
Lock the drive shaft in place by installing the ring
Check the clearance (Fig. 2) between the drive
in the groove provided in the coupling cam.
support gear hub thrust washer, before installing the
Re-install the flywheel and flywheel housing as
described on Pages 10-2-72 and 10-2-76 and install the
remaining bolts that secure the blower drive gear and