JLG 40H Service Manual User Manual
Page 94
SECTION 2 - PROCEDURES
2-74
– JLG Lift –
3120240
5.
Place friction disc 42 on shaft until it contacts bottom
disc 44. Insert one spring 41 on each dowel pin 47.
6.
Add additional discs 40, friction discs 42, and
springs 41 as required to complete assembly. Alter-
nate discs and friction discs during assembly.
7.
Insert separators 43 over spiral pins in housing.
When properly installed, separators will contact top
of bottom disc.
8.
Install o-ring 33, back-up ring 34, o-ring 36 and
back-up ring 37 on piston 35. Insert piston into end
cover 29, 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 31, bearing 32, square ring 30, pipe
plug 28 and bleeder screw 38 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 26 and lockwashers 27. 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 32 until it shoulders on shaft. Restrain
opposite end of shaft to avoid excessive thrust load-
ing of bearing 49.
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.