JLG 450AJ Service Manual - Manual (Page 37)

SECTION 2 - PROCEDURES
3120869 – JLG Lift – 2-21
5. Place mounting flange, with shaft seal side down, on
a clean flat surface.
6. Apply a light coating of petroleum jelly to the
exposed face of the front bearing block.
7. Insert the drive end of the drive shaft through the
bearing block with the seal side down, and the open
side of the E-seal pointing to the intake side of the
pump.
8. Install the seal sleeve over the drive shaft and care-
fully slide the drive shaft through the shaft seal.
Remove the seal sleeve from shaft.
9. Install the idler gear shaft in the remaining position in
the bearing block. Apply a light coat of clean oil to
the face of the drive and idler gears.
10. Pick up the rear bearing block, with seal side up and
with open end of the E-seal facing the intake side of
the pump, place over the drive and idler gear shafts.
11. Install two dowel pins in the holes in the mounting
flange or two long dowel pins through gear housing
if pump is a multiple section pump.
12. To install the O-rings in the gear housing, apply a
light coating of petroleum jelly in the grooves on
both sides of the gear housing. Also coat the new O-
rings and install them in the grooves.
13. Gently slide the gear housing over the rear bearing
block assembly, slide housing down until the hous-
ing engages the dowel pins. Press firmly in place
with hands, do not force or use any tool. Check to
make sure the in-take port in the housing is on the
same side as the open end of the E-seal and that the
marked lines on the mounting flange and gear hous-
ing are in alignment.