JLG 450A_AJ Series II Service Manual - Manual (Page 124)

SECTION 3 - CHASSIS & TURNTABLE
3-74 – JLG Lift – 3121180
Removal
Refer to Figure 3-55., Swing Motor Removal and Installation.
1. Thoroughly clean area around swing motor to pre-
vent dirt from entering system.
2. Tag and disconnect hydraulic lines to swing motor.
Cap or plug all openings.
3. Secure worm gear shaft so it does not pull out any
when removing swing motor. Failure to do so could
damage worm gear seals.
4. Remove bolts securing swing motor to swing drive
assembly.
5. Carefully pull the swing motor from the swing drive.
Preparation Before Disassembly
• Read this entire section before you disassemble motor
or any of its components for important information on
parts and procedures.
• Thoroughly clean off outside dirt, especially around fit-
tings and hose connections, before disconnecting and
removing motor. Remove rust or corrosion from cou-
pling shaft.
• Remove coupling shaft connections and hose fittings
and immediately plug port holes and fluid lines.
• Remove motor, drain fluids, and take it to a clean work
surface.
• Clean and dry motor before disassembly.
• As you disassemble 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 EXPLO-
SION OR FIRE COULD CAUSE INJURY OR DEATH.
WEAR EYE PROTECTION AND BE SURE TO COMPLY WITH OSHA
OR OTHER MAXIMUM AIR PRESSURE REQUIREMENTS.
NEVER STEAM OR HIGH PRESSURE WASH HYDRAULIC COMPO-
NENTS. DO NOT FORCE OR ABUSE CLOSELY FITTED PARTS.
• Keep parts separate to avoid nicks and burrs.
• Discard seals and seal rings as they are removed from
motor. Replace all seals, seal rings and any damaged
or worn parts with OEM approved service parts.
NOTE: Secure this end of
shaft when removing swing
motor. If it starts to pull out
with the swing motor, it can
damage internal seals.
Swing Motor
Torque swing motor mounting
bolts to 85 ft-lb (115 Nm).
Figure 3-55. Swing Motor Removal and Installation