(9)Holding the end ring (3) down, install retaining ring (1), release pressure. Inspect retaining ring beingcertain it is completely seated in its groove.(10)Install pipe plugs in end ring with air outlets - static test - check for audible air leaks and with a soapsolution to be certain no o-rings have been cut or carbon seal damaged. A moderate leakage may beexpected until carbons seals have seated against end rings during operation.(11)Align key slots in end rings with slots in shaft. Install keys (13), screws (11) and lockwashers (12).4-7.1.2 AirCompressorDriveClutch. (Figure 4-21)a.Disassembly.(1)Remove all but two of the screws (1) and lockwashers (2). Slowly remove the remaining screws looseningalternately.(2)Lift off pressure plate (3) and remove spacers (4) and adjustment spacers (5).(3)Remove shoulder bolts (6), washers (7) and springs (8).(4)Remove outer torque plate (9), with diaphragm (12) attached, inner torque plate (17) and hub (18).(5)Remove all the screws (16), lockwashers (15), clamp rings (13 and 14), diaphragm (12) and seals (10 and11) from outer torque plate (9).(6)To separate backplate (21) from hub (24), remove screws (22) and lockwashers (23). Remove registerpins (20) if replacement is necessary.b.Inspection and Repair.(1)The outer and inner torque plates (9 and 17) should be replaced if friction plate is excessively worn.(2)Closely inspect diaphragm (12) for cracks, breaks or holes. Replace if any flaws are found.(3)When assembling clutch, use new springs (8) and seals (10 and 11).c.Assembly.(1)Apply a light coat of petroleum jelly to inner and outer seals (10 and 11) and install them in grooves ofouter torque plate (9).(2)Position the diaphragm (12) on the outer torque plate (9) with the circle located near the outer edge ofdiaphragm facing out. Position the diaphragm so that the air inlet holes in the outer torque plate line upwith black circles on diaphragm.4-85
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