JLG 340AJ Service Manual - Manual (Page 90)

SECTION 3 - CHASSIS & TURNTABLE
3-50 – JLG Lift – 3121259
8. Assemble six vanes, or as many vanes that will readily
assemble into the stator vane pockets.
9. Grasp the output end of coupling shaft (12)
with locking pliers or other appropriate turning device
and rotate coupling shaft, drive link and rotor to seat the
rotor and the assembled vanes into stator, creating the
necessary clearance to assemble the seventh or full
complement of seven vanes. Assemble the seven vanes
using minimum force.
Go to assembly procedure #15, to continue assembly.
Final Checks
1. Pressurize the motor with 100 p.s.i. dry air or nitrogen
and submerge in solvent to check for external leaks.
2. Check motor for rotation. Torque required to rotate cou-
pling shaft should not be more than 50 ft. lbs. (68 N m)
3. Pressure port with "A" cast under it on housing (18) is for
clockwise coupling shaft rotation as viewed from the
output end of coupling shaft. Pressure port with "B" cast
under it is for counter clockwise coupling shaft rotation.
4. Use test stand if available, to check operation of the
motor.
Installation
Refer to Figure 3-31., Swing Motor Removal and Installation.
1. Carefully insert the swing motor into the swing drive,
making sure the swing motor shaft key is aligned cor-
rectly.
2. Secure the swing motor to the swing drive assembly
with the retaining bolts. Apply threadlocker JLG P/N
0100019 to the threads of the retaining bolts and torque
to 85 ft.lbs. (115 Nm).
3. Connect the hydraulic lines running to the swing motor
as tagged during removal.
4. Operate the swing function in both directions to ensure
proper operation. Inspect the hose connections for any
leakage.
3.11 SWING DRIVE
The swing drive assembly has five major components. They
are the housing, worm, worm gear, output pinion and gear /
pinion cap. The unit cannot be serviced while mounted on the
machine.
Removal
1. Remove the hardware securing the battery cover and
remove the battery cover.
2. Disconnect the negative terminal on the battery.
MAKE SURE THE EYEBOLTS HAVE A RATED WORK LOAD SUFFICIENT TO HAN-
DLE THE LOAD OF THE UPPERSTRUCTURE OF THE MACHINE. THE UPPER-
STRUCTURE WEIGHS APPROXIMATELY 7,000 LBS. (3175 KG).
TORQUE