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• Use the correct tools for the job. • Keep the tools clean and in good condition. • Always use YALE APPROVED parts when making repairs. Replacement parts must meet or exceed the specifications of the original equipment manufacturer. • Make sure all nuts, bolts, snap rings, and other fastening devices are removed before using force to remove parts.
630 YRM 1003 Special Precautions General This section has the description and repair procedures See the section Steering Mechanism 1600 YRM 1004 for the master drive unit (MDU). The traction motor, for troubleshooting and repairs on the steering compo- steering, and brake repair procedures are in separate nents.
630 YRM 1003 Master Drive Unit Repair Master Drive Unit Repair REMOVE b. Remove the two screws securing the lower drive unit compartment cover to the frame. Re- Separate parts of the MDU can be removed without re- move the lower drive unit compartment cover. moving the complete MDU.
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Master Drive Unit Repair 630 YRM 1003 Figure 3. Drive Unit and Brake Assembly...
Master Drive Unit Repair 630 YRM 1003 REPAIR d. Install drive axle. e. Install gear (30) with the flat side facing out WARNING toward the cover. Install nut (31) and torque to Cleaning solvents can be flammable and toxic and 175 N•m (129 lbf ft).
630 YRM 1003 Troubleshooting 5. Raise MDU slowly and insert steer shaft through 12. Install control handle. Refer to the section Steering drive frame. Mechanism 1600 YRM 1004. 6. Install upper steer bearing, flat washer, lockwasher, 13. Remove fill plug (41) and fill MDU to correct level lock nut, and wire guard sleeve.
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Troubleshooting 630 YRM 1003 PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION Oil leaks. Loose case cover. Tighten case cover. Loose fill plug. Tighten fill plug. Worn or damaged axle oil seal. Replace bearing cone and seal assem- bly.
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