HY13-1527-M1/US
Torqmotor™ Service Procedure
TF, TG, TH and TL Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 US
21
Remove end
cover &
inspect bolts
NOTE
Remove plugs
and valves
4. Remove end cover assembly (2) and seal
ring (4). Discard seal ring. SEE FIGURE 6.
NOTE: Refer to the appropriate “alternate
cover construction” on the exploded view
to determine the end cover construction
being serviced.
5. If the end cover (2) is equipped with shuttle
valve or relief valve (24) components,
remove the two previously loosened plugs
(21) and o-rings (22). SEE FIGURE 7.
CAUTION
NOTE
NOTE
CAUTION: 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: O-ring (22) is not included in seal
kits but serviced separately if required.
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.
Wash & inspect
end cover
NOTE
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 contamination.
Inspect end cover for cracks and the bolt
head recesses for good bolt head sealing
surfaces. Replace end cover as necessary.
SEE FIGURE 8.
NOTE: A polished pattern (not scratches)
on the cover from rotation of the
commutator (5) is normal. Discoloration
would indicate excess fluid temperature,
thermal shock, or excess speed and
require system investigation for cause
and close inspection of end cover,
commutator, manifold, and rotor set.
Remove
& inspect
commutator
ring
7. Remove commutator ring (6). SEE FIGURE 9.
Inspect commutator ring for cracks, or burrs.
Figure 9
Figure 8
Figure 7
Figure 6
Disassembly and Inspection
