JLG 660SJ Service Manual - Manual (Page 57)

SECTION 3 - CHASSIS & TURNTABLE
3121298 – JLG Lift – 3-13
Main Assembly
NOTE: Coat all components with a generous amount of lubricant
oil as they are being assembled.
1. Place Hub-Spindle Subassembly on bench.
2. Grease O-Ring (18) and place it in groove of Hub (1D).
3. Place Ring Gear (1E) on Hub (1D). Align three shipping
Cap Screw Holes on Hub (1D) and Ring Gear (1E).
4. Install three shipping Cap Screws (19) in ring gear and
hub. Torque to 15-20 ft-lb.
5. Place External Retaining Ring (5) over 13T spline to the
retaining groove on Input Shaft (9).
NOTE: For ratio 48:1, assemble Output Sun Gear (11) over Input
Shaft (9) first, then install External Retaining Ring (5).
6. Using appropriate tool to install Retaining Ring (20) in
groove on Output Sun (11).
7. Place Input Shaft (9) spline end into mesh with Internal
Coupling (7) splines.
8. With modified spline end facing up, place Output Gear
(11) in mesh with planet gears from Hub-Spindle Subas-
sembly.
9. Place Input Carrier Subassembly (3) on Output Sun Gear
(11) splines.
10. Grease O-Ring (17) and insert in groove in Cover Subas-
sembly (6).
11. Install Cover Subassembly (6) in Ring Gear (1E) counter-
bore and install Retaining Ring (6G) in groove in Ring
Gear (1E).
12. Check disconnect, roll and air check unit, leak check
brake, and record release pressure.
Figure 3-14. Main Assembly
Integral Brake Check
1. Using appropriate fittings, connect hydraulic line from
hand pump to brake port.
2. Check brake is set by trying to rotate Input Shaft (9). This
can be accomplished by installing an appropriate tool
(any tool that can locate on splines of Input Coupling (7),
such as a mating splined shaft) into Input Coupling
(7).Bleed brake.
3. Increase hydraulic pressure gradually while trying to
rotate input until brake just starts to release. Note this
pressure. Make sure pressure falls into appropriate range
in Table 3-2.
Table 3-2. Torque Hub Brake Release Pressure
4. Increase pressure to 1,000 psi and hold for 30 seconds to
check for leaks. Repair leaks if necessary.
NOTE: Make sure brake re-engages when pressure is released.
NOTE: When done, make sure Input Coupling (7) is centered in
Spindle (1A) to make installation of motor possible without
release of brake.
1D
1E
9
11
19 18
3 6 6A
BRAKE
CODE
JUST RELEASE
PRESSURE RANGE
PSI BAR
A 200-260 13.7-17.9
B 170-220 11.7-15.1
C 140-185 9.6-12.7
D 130-155 8.9-10.6
E 115-145 7.9-9.9