How to replace rear hub seal Cropmaster to 900

How to replace rear hub seal, Cropmaster to 900

With reference to the drawing above.

1. Lift the rear wheel off the ground, remove it and replace the wheel nuts onto the studs.

2. Make sure that the tractor is secure on axle stands or wooden blocks.

3. Remove rear cover A.

4. Straighten the tab on the lock washer B.

5. Engage the special spanner 41254 with the ring nut C.

41254 - C Spanner, for 3 1/4" O.D. final drive nut.

6. Turn the hub D anticlockwise as far as the spanner handle allows.

7. Rotate the hub anticlockwise further by using a long bar through the wheel nuts.

8. Fully release the hub using 2 x 19291S setscrews in the threaded holes in the hub.

19291S - 1/2" BSF x 3" Setscrew

9. Remove the seal carrier H, remove the seal and clean the carrier.

10. Clean sediment from bottom of final drive housing

11. Remove the wear collar I and check it for wear. If replacement is required measure the inside diameter. There are 3 different sizes, 2.5 inches, (13369), 2.75 inches (67187), and 70 mm. (35925).

13369 Wear Collar 2.5"

67187 Wear Collar 2.75"

35925 Wear Collar 70mm

12. Refit the wear collar to the hub shaft using a sealant to prevent oil from seeping out.

13. Fit the new seal, part no.12920 to the carrier

12920 - Seal, Rear Hub, double lip type

14. Refit the assembly to the final drive casing using a new gasket, part no. 13376.

13376 - Rear Hub Seal Housing Gasket

15. Refit the hub assembly in the reverse order to removal. New lock washers, part no. 13367 are available if required.

13367 - Lock Washer (Rear hub, shaft nut)

A specific torque was not specified but use a bar 2 to 3 metres long to tighten correctly.

16. Secure the ring nut with the lock washer.

17. Replace the rear cover using a new gasket, part no. 30806

30806 - Final Drive Rear Cover Plate Gasket

18. Fill final drive with 2 Litres of SAE140 gear oil (not EP).

41408 - Gear Oil, SAE140, 5L

19. Refit wheel and lower to ground.