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Parker Hannifi n Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA
Service Manual
HP2 Series Hydrostatic Tandem Pumps
HY13-1521-M1/US
Disassembly
Remove bolts
from rear housing
and center block
Remove center
block from rear
housing
Remove and
inspect rear port
plate
19. Using a gentle rocking motion, ease center
block assembly (31) off shaft. Piston barrel as-
sembly should be left in the housing.
20. Remove rear port plate. Dowel pins (13) may
remain either inside the housing or come off
with the center block. The port plate may stick
to the housing or center block.
NOTE
Be careful not to scratch the port plate
or corresponding contact surface on the
pump housing. Scratching will result in
an improper seal.
Check for excessive wear on port plate (26),
indicated by uneven scoring.
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