Model 4700 Maintenance Manual
Section 7. Component Procedures
Drive and Brake
Drive Unit/Motor Assemblies
3. Torque the four motor mounting bolts to 17 ft. lb. (23 Nm). 4. Reinstall the drive unit components in reverse order of removal.
Use extreme care whenever the truck is jacked up for any reason. Never block the truck between the telescopic and the floor. Use a suitable hoist to stabilize the mast. Keep hands and feet clear from beneath vehicle while jacking. Use jack stands or solid blocks to support truck. Do not rely on the jack alone. See “Jacking Safety” on page 2-8.
5. Reinstall mast. See “Mast Removal and Installation” on page 7-68. 6. Bleed brakes.
Brake Service - S/Ns below 10677 Replace the brake shoes when the braking material thickness is <0.08 in. (2 mm). 1. Park the lift truck on a level surface and engage the parking brake. Lower the carriage completely. 2. Turn the key switch OFF and disconnect the battery connector. 3. Block the steerable wheels to prevent truck movement.
4. Jack the front of the truck. Securely block the truck in position. 5. Remove the drive wheels. 6. Remove the two hex head bolts securing the hub cover to the brake drum. See Figure 7-25. 7. Carefully remove the hub cover by driving a screwdriver between the hub cover and drum with a rubber hammer. 8. Wipe excess grease from the gear nut and safety ring. Disengage safety ring tooth from nut and remove. 9. Remove the roller bearing and brake drum.
Figure 7-25.
Shoe Brake Assembly Exploded View
Brake Drum
Roller Bearing
Safety Ring Gear Nut
5 4 3
Publication 1160093, Issued: 20 May 2013
2
Hub Cover
1
7-29
