Dover TWG 250PR Руководство по обслуживанию и ремонту - Страница 8

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1. Remove the gearbox from the crane by securing the boom, removing the 20 mounting bolts

and any hydraulic hoses connecting the crane to the gearbox assembly.

2. Orient the gearbox vertical and drain the gear oil from the gearbox. See page 7 of this

manual.

3. Label and disconnect all hoses still attached to the gearbox.

4. Remove the hydraulic motor by removing the 2 bolts in the motor flange.

5. Remove the brake assembly from the gearbox by removing 20 bolts and washers (Item

16, 15). NOTE: Notice the orientation of the ports in relation to the drain and fill holes for

See Servicing The Brake section on page 10 for brake service or repair

reassembly.

6. Inspect the O-ring (Item 44) for damage and replace if necessary.

7. Remove the nylon thrust washer (Item 14) and sun gear (Item 13) from the input

planetary set (Item 11). Inspect for wear or damage and replace if needed.

8. Remove input planet gear assembly by pulling straight up and out of the ring gear (Item

See Servicing The Planetary Set section on page 13 for disassembly and repair.

12).

9. Remove the nylon thrust washer (Item 14) and sun gear (Item 18) from the output

planetary gear set (Item 10). Inspect for wear or damage and replace if needed.

10. Remove output planet gear assembly by pulling straight up and out of the ring gear

See Servicing The Planetary Set section on page 13 for disassembly and

(Item 12).

repair.

11. To service the pinion gear or pinion bearings see

section on Page 12 of this manual for disassembly and repair.

DISASSEMBLY

11 12

Servicing The Pinion Gear/Bearings