JLG E300 Service Manual - Manual (Page 68)

SECTION 3 - CHASSIS & TURNTABLE
3-34 – JLG Lift – 3121253
these conditions exist, replace commutator and
commutator ring as a matched set.
8. Remove manifold (7) and inspect for cracks surface
scoring, brinelling or spalling. Replace manifold if
any of these conditions exist. A polished pattern on
the ground surface from commutator or rotor rota-
tion is normal. Remove and discard the seal rings (4)
that are on both sides of the manifold.
NOTE: The manifold is constructed of plates bonded
together to form an integral component not subject to
further disassembly for service. Compare configura-
tion of both sides of the manifold to ensure that same
surface is reassembled against the rotor set.
9. Remove rotor set (8) and wearplate (9), together to
retain the rotor set in its assembled form, maintain-
ing the same rotor vane to stator contact surfaces.
The drive link (10) may come away from the cou-
pling 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 surface and for broken or
worn splines. If the rotor set component requires
replacement, the complete rotor set must be
replaced as it is a matched set. Inspect the wear-
plate 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 disas-
sembled during service procedures. Marking the sur-
face of the rotor and stator that is facing UP, with
etching ink or grease pencil before removal will
ensure correct reassembly of rotor into stator and
rotor set into motor. Marking all rotor components
and mating spline components for exact reposition-
ing at assembly will ensure maximum wear life and
performance of rotor set and motor.