Service Manual

HY13-1521-M2/US Service Manual
General Information Series HB Hydrostatic Transmission
Remove charge pump
rotor and stator
Remove charge pump rotor,
stator and o-ring. Inspect for
scoring or any damage to
rotor and stator. Inspect the
O-ring, it should be flexible
and conform to the o-ring
groove in the charge pump
cover.
Remove two dowel pins
Remove the dowel pins by
sliding the pins out of the
bores in the end block.
Remove the charge pump
pressure relief valve
Remove with ¼” allen head
socket or appropriate hex
wrench as necessary.
Orifice Plug
Do not remove the orifice
plug! Make sure the orifice is
free from debris by blowing
low pressure shop air
through orifice to ensure
clean passage.
25
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA