JLG 340AJ Service Manual - Manual (Page 238)

SECTION 5 - HYDRAULICS
5-80 – JLG Lift – 3121259
6. Install outer seal.
Prepare the outer seal by lightly lubricating with grease.
Install outer seals in the grooves on both sides of the
body.
7. Prepare the gears.
THE GEAR SURFACES ARE SUPERFINISHED. RESIDUE ON HANDS AND FINGERS
MAY BE CORROSIVE TO THIS SURFACE. DO NOT TOUCH.
Carefully clean the two gears. If the gears are new, wash
them with shop solvent to remove any anticorrosive
grease on the surfaces.
Inspect the journals and the flat faces on the top and
bottom of the gears. Ensure these surfaces are free from
burrs or scratches. If scratches or burrs are found, clean
them with a flat stone and/or very fine emery paper.
Rewash the gears after this operation.
8. Prepare the bearing blocks.
Clean the two bearing blocks.
Inspect the flat surfaces of the bearing blocks for burrs
or scratches on the edges. If necessary, remove burrs
with very fine emery paper. Then rewash the bearings.
Inspect the DU™ bushings for wear. There should be no
bronze showing.
Using clean hydraulic oil, lubricate the internal and
external surfaces of the bearing blocks.
9. Assemble the bearing blocks and gears.
Lubricate the journals and the gear faces.
Assemble the bearing blocks and gears. Ensure that the
recessed bearing faces are installed adjacent to the gear
faces. Align all assembly marks made during disassem-
bly. Ensure the front and rear bearing blocks occupy the
same location with respect to the housing as before dis-
assembly. Ensure that the relative position of the gear
mesh is maintained as before disassembly. Misalign-
ment of the gear teeth may increase operating noise.