Charge Pump - Hydro-Gear ZT-2800 Service And Repair Manual

CHARGE PUMP

Refer to Figures 23-23a
Disassembly
1. Mark the orientation of the charge pump
cover relative to the main housing, prior
to removal. Refer to figure 23.
2. Remove the hex head screws (134), charge
pump cover (133), gerotor assembly (131),
and the O-ring (132). Remove the con-
necting tubes (130) and lip seal (157) at
this point – only if the center section will be
removed. A pick type tool can be used to
remove the connection tubes and seal.
Inspection
1. Inspect the gerotor assembly for wear or
damage. Replace if necessary.
Assembly
1. Reassemble all parts in the reverse order
of disassembly.
NOTE: When reinstalling the charge pump
components, replace the O-ring (132).
Also replace the connecting tubes
(130) and lip seal (157), if they have
been removed.
2. Align the mark on the charge pump cover,
(from step 1, Disassembly), with the mark
on the main housing.
Charge Pump Cover
Figure 23, Charge Pump Cover Orientation
ZT-2800 /ZT-3100 /ZT-3200
® ®
Main Housing
Squared Directional Mark
Mark made before disassembly
TM
3. When tightening the fasteners, refer to the
table on page 22 for the required torque
values.
NOTE: As a general rule, use the low end of
the torque specification on fasteners
when reassembling the unit.
Figure 23a, Charge Pump
130
157
132
131
133
134
203
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