JLG 80HX_HX+6_HXER ANSI Service Manual User Manual
Page 49
SECTION 3 - CHASSIS & TURNTABLE
3120271
– JLG Lift –
3-11
6.
Add additional discs (15), friction discs (17), and
springs (16) as required to complete assembly.
Alternate discs and friction discs during assembly.
7.
Insert separators (18) over spiral pins in housing.
When properly installed, separators will contact top
of bottom disc.
8.
Install o-ring (8), back-up ring (9), o-ring (11) and
back-up ring (12) on piston 10. Insert piston into end
cover (4), being careful not to shear o-rings or back-
up rings. Inserting 1/4-20 UNC bolts in piston may
simplify installation.
9.
Install o-ring (6), bearing (7), square ring (5), pipe
plug (3) and bleeder screw (13) in end cover.
10.
Position end cover on housing, aligning dowel pins
with holes in cover, and push end cover until top fric-
tion disc aligns with spline shaft.
11.
Install capscrew (1) and lockwashers 2. Tighten
evenly to draw end cover to housing and bearing
onto shaft. Torque capscrews 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 capscrews.
12.
To eliminate binding on bearings, press on inner ring
of bearing (7) until it shoulders on shaft. Restrain
opposite end of shaft to avoid excessive thrust load-
ing of bearing (24).
IF HYDROSTATIC BENCH TESTING IS PERFORMED ON THE
BRAKE ASSEMBLY. RELEASE PRESSURE SHOULD NOT EXCEED
2000 PSI (137.9 BAR) UNLESS TWO ADDITIONAL BOLTS ARE
USED FOR SUPPLEMENTAL CLAMPING.
Bleeding
1.
Install brake and connect pressure lines.
2.
Bleed pressure release section of brake by pressur-
izing side inlet port and allowing air to escape from
top port. Pressure should not exceed 100 psi (6.9
Bar) during bleeding.
3.
Apply sufficient pressure to release brake and check
for proper operation.
Figure 3-3. Drive Brake, Mico - Machines Built Prior to October 1987