JLG 450A_AJ Series II Service Manual - Manual (Page 122)

SECTION 3 - CHASSIS & TURNTABLE
3-72 – JLG Lift – 3121180
3.10 SWING MOTOR
IF HYDRAULIC SYSTEM FLUID BECOMES OVERHEATED [IN
EXCESS OF 200
°F (93.3°C)], SEALS CAN SHRINK, HARDEN, OR
CRACK AND LOSE THEIR SEALING ABILITY.
Preparation Before Disassembly
PETROLEUM-BASE SOLVENTS ARE FLAMMABLE. BE EXTREMELY
CAREFUL WHEN USING ANY SOLVENT. EVEN A SMALL EXPLOSION
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 COM-
PONENTS. DO NOT FORCE OR ABUSE CLOSELY FITTED
PARTS.
• Before you disassemble motor or any of its compo-
nents read this entire section. It provides important
information on parts and procedures to service motor.
• Before disconnecting and removing motor, thoroughly
clean off all outside dirt, especially from around fittings
and hose connections. Remove rust or corrosion from
coupling shaft.
• Remove coupling shaft connections and hose fittings
and immediately plug port holes and fluid lines.
• Remove motor from system, drain fluid, and move it to
a clean work surface.
• Clean and dry motor before disassembly.
• Keep parts separate to avoid nicks and burrs.
• Discard all seals and seal rings as they are removed
from motor. Replace all seals, seal rings and any dam-
aged or worn parts with OEM approved service parts.
• As you disassemble motor, clean all parts except seals
in clean petroleum-based solvent, and blow them dry.
Figure 3-54. Swing Motor - Cutaway