JLG 460SJ Service Manual - Manual (Page 309)

SECTION 5 - HYDRAULICS
3120895 – JLG Lift – 5-21
c. Wire brush screw threads ton remove cured
Loctite and other debris. Discard any screws
that have damaged threads or rounded heads.
d. Wash screws with non - petroleum base solvent.
Blow dry with compressed air.
1. If you remove plug and seal, lubricate new seal and
install on plug. Some plugs have two o-ring grooves
but require only one o-ring. Install o-ring groove
closest to end of plug. Push plug into housing so
plug and housing are flush. Be careful not to dam-
age seal.
2. Lubricate output shaft with hydraulic oil, then install
shaft in housing.
DO NOT PERMIT OIL TO GET INTO THE FOUR TAPPED HOLES.
3. Install needle thrust bearing, then bearing race on
shaft. Pull shaft part way out of the housing. Push all
three parts in housing together. The bearing race
must rotate freely when in position.
4. Install exclusion seal in flange. Carefully press exclu-
sion seal into place.
5. Visually check seal seat in mounting flange for
scratches or other marks that might damage the
pressure seal. Check for cracks in flange that could
cause leakage.
6. Lubricate I.D. of seal tube and O.D of shaft pressure
seal with light film of clean petroleum jelly. Align
small I.d. end of seal tube with seal seat in mounting
flange. Install back - up ring and pressure seal in
tube with lips of seal face up. See Figure 2-46. Insert
seal driver in tube and firmly push seal seat with a
rotating action.
AFTER INSTALLING SEAL IN FLANGE, EXAMINE SEAL CONDI-
TION. IF DAMAGED OR IMPROPERLY INSTALLED, YOU MUST
REPLACE IT BEFORE CONTINUING WITH REASSEMBLY.
7. Install 1 5/16 in. (49 mm) I.D. seal in flange.
8. It is recommended to apply a light coat of Loctite
Primer NF in tapped holes of housing. Allow primer
to air dry for at least 1 minute. Do not force dry with
air jet; the primer will blow away.
Use of primer is optional. With primer, Loctite curing
time is approximately 15 minutes. Without primer,
curing time is approximately 6 hours.