GEAR BOX 6450 21 7. Disassemble the extension arm by removing the extension arm-mounting pin. 8. Mount the gearbox assembly on holding mounting bracket (Part number: 5403 5890 26 12). CAUTION: Make sure gearbox is in neutral position before starting the disassembly. 9. Loosen and remove nuts (6 nos.) of top cover assembly. 10. Remove the gasket between top cover and rear half housing. CAUTION: Remove top cover assembly with proper tool at shown location that can avoid the damage to the gearbox and top cover assembly surface. NOTE: Before removing the coupling flange of gear box make sure double locking is done (reverse gear and second gear need to be engage by pushing dogs forward as shown in figure) for locking of main shaft. 11. Remove the flange nut by using tool (Part Number: 2698 5890 41 01).
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