JLG 500RTS ANSI Service Manual - Manual (Page 45)

SECTION 2 - PROCEDURES
3121103 – JLG Sizzor – 2-29
NOTE: Be sure to use the same number of springs and
same spring pattern as recorded during disassem-
bly.
6. Position new large diameter return plate in housing
with tabs guided by dowel pins until disc rests on
springs.
NOTE: Rotor discs and stator friction discs should remain
dry during installation. No oil residue should be
allowed to contaminate disc surfaces.
7. Place a new friction disc on shaft until it contacts
return plate.
8. Add additional new stator discs and new rotor discs
as required to complete assembly.
9. Insert separators in holes of return plate.
10. Install new o-ring, new back-up ring, new o-ring, and
new back-up ring on piston. Note order of o-rings
and back-up rings. Insert piston into end cover,
being careful not to shear o-rings or back-up rings.
11. Install case seal in housing, then install bleeder
screw in end cover.
12. Position end cover on housing, aligning dowel pins
with holes in end cover.
13. Install washer head cap screws and tighten evenly
to draw end cover to housing. Torque washer head
cap screws to 55 ft lbs (75 Nm).
NOTE: If available, a hydraulic press will simplify installation
of end cover on housing. Clamp cover in position
while tightening washer head cap screws.
14. If hydrostatic bench testing is done on brake assem-
bly, release pressure should not exceed 2000 psi
(138 bar) unless two additional bolts are used for
supplemental clamping.