MCi Crusader II 1989 Maintenance Manual page 509

Date
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1_6_-3_9 _ _
MC-9 MAINTENANCE MANUAL
Figure 16-59: Checking Coll-to-Rotor Clearance
8. Place the armature and hub assembly onto the com-
pressor crankshaft. Align the keywayslots in the crankshaft
and armature hub.
9. Install the key into the keyways. Make sure the outer
end of the key is flush with the hub counterbore.
10. Install the flat washer, lock washer and capscrew to
secure the armature to the shaft. Tighten the capscrew to
16-20 lb.-ft. (22-27 Nm) while using tool 20-296 to prevent
armature rotation.
NOTE: The remainder of this procedure
applies to new clutch installations only.
11. Using a feeler gauge, measure and record the air gap
between the rotor face and the armature face. See figure
16-60.
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Figure 16-60: Measuring Rotor-to-Armature Air Gap
12. Determine if the air gap as measured meets the
required air gap of .045 ± .015" (1.143 ± 0.381 mm).
NOTE: Shims have been factory installed
between the armature and the armature
hub. There are six .020 shims and one .010
shim; one or more of them may require
removal in order to achieve the proper air
gap for new clutch installations.
13. Determine which shims should be removed, if any, for
the .045 ± .015" (1.524 ± 0.381 mm) air gap.
NOTE: The remainder of this procedure is
necessary only if air gap Is not within
.030"-.060" (.762-1.524
mm).
14. Install tool 20-296 to prevent armature rotation and
remove the six armature-to-hub retaining nuts and washers
(figure 16-61 ).
Figure 16-61: Removal of Armature Retaining Nuts
15. Remove the armature plate and the required shims
for the correct air gap.
16. Insert a .020" (.508 mm) feeler gauge between the
outside ·edge of the clutch bearing mounting hub and the
inside edge of the armature mounting hub. See·figure 16-62.
If the clearance is less than .020" (.508 mm), clutch installa-
tion to this point is not correct. Determine the reason for the
clearance discrepancy and correct before proceeding.
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Figure 16-62: Checking Bearing Hub and
Armature Hub Clearance
17. Reinstall the armature plate, washers and nuts.
Tighten nuts to 7 lb.-ft. (9.5 Nm) torque. ·
18. Check for the proper air gap between clutch faces. If
satisfactory, procedure is complete.
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