JLG 600SC_660SJC Service Manual - Manual (Page 283)

SECTION 8 - HYDRAULICS
3121157 – JLG Lift – 8-23
General Information
It is important that the relationship of the mounting flange,
bearing blocks and gear housing is correct. Failure to
properly assemble this pump will result with little or no
flow at rated pressure.
Reverse Shaft Rotation of Pump
NOTE: This pump is not bi-rotational, if the shaft rotation
must be changed the following procedure must be
followed.
Reversing the shaft rotation of the "W" series gear pump
may be accomplished by rotating, as a group, the two
bearing blocks and the gear housing 180° in relationship
to the remaining parts of the pump. This procedure will
place the pressure port on the opposite side of the pump
from its original position.
Assembly
NOTE: New seals should be installed upon reassembly of
pump or motor. deter to page 8 for the necessary kit
part numbers for the W-600, W-900 and W-1500
pumps and motors.
1. Install new shaft seal in mounting flange with part
lumber side facing outboard. Press the seal into the
seal lore until the seal reaches the bottom of the
bore. Uniform pressure must be used to prevent
misalignment or damage to the seal.
2. Install retaining ring in groove in seal bore of mount-
ing flange.
3. Place front and back bearing blocks on a clean sur-
face with the E-seal grooves facing up. Apply a light
coating of petroleum jelly in the grooves. Also coat
the E-seal and backup with the petroleum jelly, this
will help keep the seals in place during reassembly.
4. Place the E-seals, flat side outward, into the grooves
in both bearing blocks. Follow by carefully placing
the backup ring, flat side outward, in the groove
made by the E-seal and the groove in the bearing
block. (Note: in the W900 series pump, in the center
of the backup ring and E-seal there is a notch make
sure that these notches line up so the backup ring
will set flush with the E-seal). The backup ring in the
W1500 pump is symmetrical.