Figure 14-2. Air inlet housing, exploded view.
Note. Installing a .003 inch shim
(c) Torque bearing retainer bolts (26
a rotor gear will turn the rotor .001 inch.
and 41) to 7-9 foot-pound.
(j) Determine the minimum clearances
(d) Torque water pump drive cou-
at points "A" and "B" shown on figure 14-
pling retaining bolt (39) to 18 foot-pound.
5. Measure clearances at the ends of each
(e) Torque end plate cover (37)
lobe, making 12 measurements in all.
mounting bolts (35) to 13-17 foot-pound.
(f) Before installing the blower rotor
the clearance between each rotor lobe and the
timing gears (24) check rotor-to-end plate
blower housing at both the inlet and outlet
and rotor-to-housing clearances. See figure
side. Twelve measurements are required.
(l) Torque the plate to hub bolts
(g) Torque rotor timing gear retain-
(14) to 25-30 foot-pound.
ing bolts (20) to 55-65 foot-pound.
(m) Torque plate to gear bolts (11) to
(h) After the blower rotors (33 and
34) and timing gears (24) are installed, time
(n) Measure the runout of the rotor
drive hub splines with an indicator. The
Note. When the right hand helix gear is
spline runout must not exceed .020 inch total
moved out, the right hand helix rotor will turn coun-
terclockkwise when viewed flrom the gear end. When
the left hand helix gear is moved out, the left hand
helix rotor will turn clockwise when viewed from the
mounting bolts to 13-17 foot-pound.
(2) Reassemble the blower drive assem-
bly in the reverse of the numerical sequence
(i) If more or less shims are required
as illustrated on figure 14-3.
to produce the desired clearance indicated on
Note. Torque the hub nut (10)
from the rotors.