HY13-1527-M1/US
Torqmotor™ Service Procedure
TF, TG, TH and TL Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 US
22
Remove &
inspect
commutator
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 discard 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. SEE
FIGURE 10 & 11.
Remove
manifold
9. Remove manifold (7) and inspect for cracks
surface scoring, brinelling or spalling.
Replace manifold if any of these conditions
exist. SEE FIGURE 12. A polished pattern
on the ground surface from commutator
or rotor rotation is normal. Remove and
discard the seal rings (4) that are on both
sides of the manifold.
NOTE
NOTE: The manifold is constructed
of plates bonded together to form an
integral component not subject to
further disassembly for service. Compare
configuration of both sides of the
manifold to ensure that same surface is
reassembled against the rotor set.
Remove &
inspect
rotor set &
wearplate
10. Remove rotor set (8) and wearplate (9),
together to retain the rotor set in its
assembled form, maintaining the same rotor
vane (8C) to stator (8B) contact surfaces. SEE
FIGURE 13. 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 (8A) and wearplate.
SEE FIGURE 14. 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
wearplate for cracks, brinelling, or scoring.
Discard seal ring (4) that is between the rotor
set and wearplate.
NOTE
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 pencil before removal from
Torqmotor™ will ensure correct reassembly
of rotor into stator and rotor set into
Torqmotor™. Marking all rotor components
and mating spline components for exact
repositioning at assembly will ensure
maximum wear life and performance of
rotor set and Torqmotor™.
Figure 10
Figure 11
Figure 12
Figure 13
Disassembly and Inspection
