Service Manual

HY13-1521-M2/US Service Manual
General Information Series HB Hydrostatic Transmission
Remove bearing cage and
thrust washers
Note: Washers should be
re-installed in the same
orientation/position they
were found – Do not Flip
Remove the bearing cage
and thrust washers from the
swash block by lifting them
out. Check both washers and
bearing for excess wear or
pitting damage.
Remove the trunnion arm
and control block
Remove the trunnion arm
and the control block by
sliding the trunnion arm
toward the center of the top
housing and removing it from
the bore.
Caution:
Do not remove the two
cradle bushings!
The bushings can have light
wear pattern but no other
damage. Both bushings must
be tight and seated flat
against radius.
Trunnion arm seal
Inspect trunnion arm seal for
any damage or leakage at or
around trunnion arm seal.
If replacing the trunnion seal
remove retainer clip then
trunnion arm seal with a flat
head screw driver.
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Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA