Parker Hannifin Corporation
Gear Pump Division
Kings Mountain, North Carolina USA
10
6) Assemble new sealing
parts, the rubber seal
first, the plastic seal
on top. (Pump thrust
block shown with seals
installed.)
NOTE: The seals face
the high pressure side
of the pump.
7) Motor thrust block
with seals installed.
9) Slide the mylar
shaft seal sleeve
over the drive shaft.
Lubricate the sleeve
with grease to
lubricate the shaft
seal during assembly.
8) Assemble the front
thrust block into the
mounting flange,
sealing parts can be
fixed with grease.
Orientation is rotation
sensitive for pumps!
The instructions for proper installation for a 2 piece pump seal are as follows:
1. Turn the thrust blocks so the seal groove faces up
2. Place the soft black Buna-N seal into the seal groove with the flat side down
3. Place the hard nylon back-up seal, flat side up, into the groove on top of the Buna-N seal
Catalog HY09-SM500/US
Assembly Information
PGP/PGM500 Series
Service Manual
The proper seal installation is very important. If these seals are assembled upside
down they will most likely fail in a short period of time under system pressure.
