back of a rotor will revolve the rotor
0.001".
3. Install the required thickness of shims
back of the proper gear and next to the
bearing inner race and reinstall both
Recheck the clearance between
the rotor lobes.
F i g u r e 11D-23. Measuring End
Clearance
removed, a t t a c h r o t o r d r i v e h u b
A.
If
plates (115) to drive hub (20) with
t h r e e b o l t s ( 2 2 ) , lock washers and
Tighten the bolts to
plain washers.
25-30 lb-ft (34-41 Nm) torque.
B.
Attach the rotor drive hub and drive
plates
to
the
right
hand
helix
rotor
timing
gear
with
three
bolts
(21),
lock washers, plain washers and three
spacers (116) and bearing retainers
(117) between the plates and the face
F i g u r e 11D-22. S h i m L o c a t i o n s f o r
Tighten the bolts to
of the gear.
Correct Lobe Clearances
25-30 lb-ft (34-41 Nm) torque.
4. Determine the minimum clearances at
C.
Check the runout of the splines in
point
"A"
and
"B"
shown
in
the rotor drive hub with an indicator.
Figure 11D-21 on page 11D-15 Insert
The spline runout must not exceed
the feeler gauges, as shown in
0.020" total indicator reading.
Figure 11D-23, between the end pIates
and the ends of the rotors. This opera-
2. Affix a new gasket
(32)
to
blower
rear
tion must be performed at the ends of
end plate (29).
each l o b e , m a k i n g t w e l v e m e a s u r e m e n t s
See Figure 11D-21 on page
i n all.
3. Position the end plate cover over the
11D-15 for the minimum clearances.
Then push the
end plate dowel pins.
Install the
cover against the end plate.
5. Check the clearance between each ro-
ten bolts and lock washers. Tighten the
tor lobe and the blower housing at both
bolts to 13-17 lb-ft (18-23 Nm) torque.
the inlet and outlet side- twelve meas-
See Figure 11D-21 on
urement in all.
page 11D-15 for the minimum clearances.
A t t a c h Accessories to Blower
After the blower rotors are timed, com-
Refer to Figure 11D-3 on page 11D-3 and
plete the assembly of the blower as fol-
attach the fuel pump, water pump, blow-
lows:
er drive shaft cover and governor weight
h o u s i n g as follows:
1. Refer to Figure 11D-11 on page 11D-8
and attach blower rotor drive hub (20)
1. Attach the fuel pump to the blower as
and drive hub plates (115) to the blower
outlined under "Attach Fuel Pump to
g e a r s as follows:
B l o w e r " in Subsection 11C.
