Parker Hannifin Corporation
Gear Pump Division
Kings Mountain, North Carolina USA
3
505/511
Service Manual
General Instructions
These service instructions will familiarize
you with Parker’s single and multiple pumps:
•
their component parts
•
the relative position of each part
•
proper methods for assembly or
disassembly of the units
To facilitate the repair of these units and before any
work is done, we suggest that you first read all of the
steps used in disassembly and assembly.
Dirt is the enemy of any hydraulic system. The first
requirement for good maintenance of hydraulic
equipment is cleanliness. MAKE SURE YOU
DISASSEMBLE AND ASSEMBLE YOUR
HYDRAULIC EQUIPMENT IN A CLEAN AREA.
The pictures show a Model PGP511. Notes in the
text cover variations between this unit and the
other models.
It is important to airblast all parts and wipe them with
a clean, lintless cloth before assembly.
USE CAUTION IN GRIPPING ALL PARTS
IN THE VISE TO AVOID DAMAGING
MACHINED SURFACES.
A pump must be driven in the direction of rotation for
which it was built; otherwise, pressure will blow the
shaft seal. Check the exploded view and notes at right
for proper direction of rotation.
Parker’s Replacement Parts
Parker’s replacement parts are of original equipment
standards. For assured quality of material and work-
manship, and for compatibility in assembly, USE ONLY
GENUINE PARTS.
Check all replacement parts before installing them to
be certain that they were not damaged in shipment.
Catalog HY09-SM500/US
General Instructions
PGP/PGM500 Series
Service Manual
Single Pump
