JLG E450A Service And Maintenance Manual page 83

9. Remove rotor set (8) and wearplate (9), together to
retain the rotor set in its assembled form, maintaining
the same rotor vane to stator contact surfaces. The drive
link (10) may come away from the coupling shaft (12)
with the rotor set, and wearplate. You may have to shift
the rotor set on the wearplate to work the drive link out
of the rotor and wearplate. Inspect the rotor set in its
assembled form for nicks, scoring, or spalling on any sur-
face and for broken or worn splines. If the rotor set com-
ponent requires replacement, the complete rotor set
must be replaced as it is a matched set. Inspect the
wearplate for cracks, brinelling, or scoring. Discard seal
ring (4) that is between the rotor set and wearplate.
NOTE: The rotor set (8) components may become disassembled
during service procedures. Marking the surface of the rotor
and stator that is facing UP, with etching ink or grease pen-
cil before removal will ensure correct reassembly of rotor
into stator and rotor set into motor. Marking all rotor com-
ponents and mating spline components for exact reposi-
tioning at assembly will ensure maximum wear life and
performance of rotor set and motor.
NOTE: A polished pattern on the wear plate from rotor rotation is
normal.
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SECTION 3 - CHASSIS & TURNTABLE
10. Place rotor set (8) and wear plate (9) on a flat surface and
center rotor in stator such that two rotor lobes (180
degrees apart) and a roller vane centerline are on the
same stator centerline. Check the rotor lobe to roller
vane clearance with a feeler gage at this common cen-
terline. If there is more than 0.005 inches (0.13 mm) of
clearance, replace rotor set.
NOTE: If rotor set (8) has two stator halves and two sets of seven
vanes as shown, check the rotor lobe to roller vane clear-
ance at both ends of rotor.
11. Remove drive link (10) from coupling shaft (12) if it was
not removed with rotor set and wear plate. Inspect drive
link for cracks and worn or damaged splines. No percep-
tible lash (play) should be noted between mating spline
parts. Remove and discard seal ring (4) from housing
(18).
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