JLG t350 Service And Maintenance Manual page 74

SECTION 3 - CHASSIS & TURNTABLE
5. If the end cover (2) is equipped with shuttle valve
components, remove the two previously loosened
plugs (21).
BE READY TO CATCH THE SHUTTLE VALVE OR RELIEF VALVE
COMPONENTS THAT WILL FALL OUT OF THE END COVER VALVE
CAVITY WHEN THE PLUGS ARE REMOVED.
NOTE: The insert and if included the orifice plug in the end
cover (2) must not be removed as they are serviced
as an integral part of the end cover.
6. Thoroughly wash end cover (2) in proper solvent
and blow dry. Be sure the end cover valve apertures,
including the internal orifice plug, are free of con-
tamination. Inspect end cover for cracks and the bolt
head recesses for good bolt head sealing surfaces.
Replace end cover as necessary.
NOTE: A polished pattern (not scratches) on the cover from
rotation of the commutator (5) is normal. Discolor-
ation would indicate excess fluid temperature, ther-
mal shock, or excess speed and require system
investigation for cause and close inspection of end
cover, commutator, manifold, and rotor set.
3-38
7. Remove commutator ring (6). Inspect commutator
ring for cracks, or burrs.
8. Remove commutator (5) and seal ring (3) Remove
seal ring from commutator, using an air hose to blow
air into ring groove until seal ring is lifted out and dis-
card seal ring. Inspect commutator for cracks or
burrs, wear, scoring, spalling or brinelling. If any of
these conditions exist, replace commutator and
commutator ring as a matched set.
– JLG Lift – 3121198