Service Manual Instruction Manual

SECTION 5 - HYDRAULICS
5-60 – JLG Lift – 3121616
General Information
FAILURE TO PROPERLY ASSEMBLE THIS PUMP WILL RESULT WITH LITTLE OR
NO FLOW AT RATED PRESSURE. RELATIONSHIP OF MOUNTING FLANGE, BEAR-
ING BLOCKS, AND GEAR HOUSING MUST BE CORRECT.
Reverse Shaft Rotation of Pump
NOTE: Pump is not bi-rotational. Use the following procedure if
shaft rotation direction is changed.
Reverse shaft rotation of ”W” series gear pump by rotating, as
a group, two bearing blocks and gear housing 180° in relation-
ship to remaining parts of pump. This places pressure port
opposite from original position.
Assembly
NOTE: Install new seals when reassembling pump or motor. Go to
page 8 for kit part numbers for W-600, W-900, and W-1500
pumps and motors.
1. Install new shaft seal in mounting flange with part num-
ber side facing out. Press seal into seal bore until seal
reaches bottom of bore. Use uniform pressure to pre-
vent seal misalignment or damage.
2. Install retaining ring in groove in seal bore of mounting
flange.
3. Place front and back bearing blocks on a clean surface
with E-seal grooves facing up. Apply a light coating of
petroleum jelly in the grooves. Coat E-seal and backup
with petroleum jelly. This helps keep seals in place dur-
ing reassembly
4. Place E-seals, flat side out, into grooves in both bearing
blocks. Carefully place backup ring, flat side out, in
groove made by E-seal and groove in bearing block.
(Note: W900 series pump - In center of backup ring and E-
seal there is a notch. Make sure notches line up so backup
ring will set flush with E-seal). Backup ring in W1500
pump is symmetrical.