JLG 450A_AJ Series II Service Manual - Manual (Page 320)

SECTION 5 - HYDRAULICS
5-30 – JLG Lift – 3121180
6. Apply a light coating of petroleum jelly to exposed
face of front bearing block.
7. Insert drive end of drive shaft through bearing block
with seal side down and open side of E-seal pointing
to intake side of pump.
8. Install seal sleeve over drive shaft. Carefully slide
drive shaft through shaft seal. Remove seal sleeve
from shaft.
9. Install idler gear shaft in remaining position in bear-
ing block. Apply a light coat of clean oil to face of
drive and idler gears.
10. Place rear bearing block over drive and idler gear
shafts with seal side up and open end of E-seal
facing intake side of pump.
11. Install two dowel pins in mounting flange holes or
two long dowel pins through gear housing if pump is
a multiple section pump.
12. Apply a light coating of petroleum jelly in grooves on
both sides of gear housing. Coat new O-rings and
install in grooves.
13. Gently slide gear housing over rear bearing block
assembly. Slide housing down until it engages the
dowel pins. Press firmly in place with hands, do not
force or use any tool. Check intake port in housing is
on same side as open end of E-seal and marked
lines on mounting flange and gear housing are in
alignment.
NOTE: Rear bearing block surface should be slightly below
gear housing face. If bearing block is higher than
rear face of gear housing, E-seal or O-ring have
shifted out of groove. Remove gear housing and
check for proper seal installation.