JLG 450A_AJ Series II Service Manual - Manual (Page 133)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-83
3. Press new dirt and water seal (20) into housing (18)
outer bearing counterbore. Press in dirt and water
seal (20) until flange is flush against housing.
4. Place housing (18) assembly into a soft jawed vise
with coupling shaft bore down, clamping against
mounting flange.
5. Assemble a new backup ring (17), new backup
washer (25), and new seal (16) with seal lip facing
toward inside of motor, into their counterbores in
housing (18).
6. Install thrust washer (14) and thrust bearing (15).
NOTE: Motor requires one thrust washer (14) with thrust
bearing (15). Coupling shaft is seated directly
against thrust bearing.
7. Apply masking tape around splines or keyway on
shaft (12) to prevent damage to seal.