JLG 340AJ, Service And Maintenance Manual

Page: 76 / 370

SECTION 3 - CHASSIS & TURNTABLE
3-34 – JLG Lift – 3121259
Removal
Refer to Figure 3-31., Swing Motor Removal and Installation.
1. Thoroughly clean the area around the swing motor to
prevent any dirt from entering the system.
2. Tag and disconnect the hydraulic lines running to the
swing motor. Cap or plug all openings.
3. Secure the worm gear shaft so it does not pull out any
when removing the swing motor. Failure to do so could
damage the worm gear seals.
4. Remove the bolts securing the swing motor to the
swing drive assembly.
5. Carefully pull the swing motor from the swing drive.
Preparation Before Disassembly
• Before you disassemble the motor unit or any of its compo-
nents read this entire section. It provides important infor-
mation on parts and procedures you will need to know to
service the motor.
• Thoroughly clean off all outside dirt, especially from
around fittings and hose connections, before disconnect-
ing and removing the motor. Remove rust or corrosion
from coupling shaft.
• Remove coupling shaft connections and hose fittings and
immediately plug port holes and fluid lines.
• Remove the motor from system, drain it of fluid and take it
to a clean work surface.
• Clean and dry the motor before you start to disassemble
the unit.
• As you disassemble the motor clean all parts, except seals,
in clean petroleum-based solvent, and blow them dry.
PETROLEUM-BASE SOLVENTS ARE FLAMMABLE. BE EXTREMELY CAREFUL
WHEN USING ANY SOLVENT. EVEN A SMALL EXPLOSION OR FIRE COULD CAUSE
INJURY OR DEATH.
NOTE: Secure this end of the
shaft when removing the swing
motor. If it starts to pull out with
the swing motor it could dam-
age the internal seals.
Swing Motor
Torque the swing motor
mounting bolts to 95 ft.lbs.
(130 Nm).
Figure 3-31. Swing Motor Removal and Installation