Section 7. Component Procedures
Model 4700 Maintenance Manual
Drive Unit/Motor Assemblies
Drive and Brake
Drive Unit/Motor Assemblies
Figure 7-15.
Filling with Funnel and Flexible Hose
Dual Traction Motor Trucks The drive unit/motor assemblies, one for each drive wheel, consist of a planetary gear type drive unit and an AC motor.
Changing Fluid 1. Run the truck for a few minutes to warm the fluid. 2. Clean the area around the fluid fill and drain plugs. See Figure 7-14. Figure 7-14.
Drive Unit Plug Locations Fill Plug
Drain Plug
7. Clean the area around the fluid fill and drain plugs. 8. Run the truck for several minutes. Check the fluid level again.
Drive Unit Removal 1. Park the lift truck on a level surface. Engage the parking brake. Turn the key switch OFF and disconnect the battery connector. 2. Block the steerable wheels to prevent truck movement.
3. Place a suitable container below the drain plug. 4. Remove both the fill and the drain plugs. Allow the fluid to drain out completely. 5. Clean any ferrous residue from the magnetic drain plug. Replace the drain plug, torquing to 16 ft. lb. (22 Nm). 6. Use a flexible hose with either a syringe or a funnel to add new fluid (type ATF II D or equivalent) through the fill plug hole until it starts overflowing (approx. 0.75 pints, 0.35 liter). See Figure 7-15. Install the fill plug. Torque to 16 ft. lb. (22 Nm).
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. 3. Jack the front of the truck. 4. Release the parking brake. 5. Drain the fluid (see “Changing Fluid”). 6. Remove the drive wheel. 7. Disconnect all hoses and cables connected to the parking brake, service brake, and traction motor.
7-22
Publication 1160093, Issued: 20 May 2013
