Front Tires

(4) Back off nut (7) from one-sixth to one-

KEY to figure 4-40:

1. Spindle

quarter of a turn. Install new lock (19) and outer

2. Cone

nut (7) and bend over tang of lock to secure outer

3. cup

nut in place.

4. Bolt

(5) Install grease cap and remove jack and

5. Hub

blocks.

6. Key washer

7. Adjustment nut

4-61. Front Tires

8. Nut

a. Removal.

9. Washer

10. Wheel

(1) Block tractor securely. Using a suitable

11. Tire

jack, raise tractor to permit removal of front wheel

12. Screw

assemblies.

13. Gasket

(2) Remove five wheel mounting nuts (17, fig.

14. Grease cap

15. Washer

4-40) and washers (18) front bolts (4) and remove

16. Screw

wheel and tire assembly.

17. Nut

( 3 ) Deflate tire and remove five nuts (8),

18. Washer

washers (9), and screws (12) holding wheel halves

19. Lock

together, separate wheel halves and remove flap,

20. Hub assembly

21. Oil seal

tube and tire.

b. Inspection and Repair.

b. Cleaning and Inspection.

(1) Inspect wheels for secure mounting.

(1) Clean cups, cones, nuts, washers and

(2) Inspect tires for cuts, excessive wear, and

grease cap with SD, and dry with a clean soft cloth.

imbedded foreign objects.

(2) Inspect cups, cones, and washers for

(3) Repair punctures of tire or tube less than

breaks, cracks, burrs, scoring, and wear. Replace as

3/8 inch in greatest dimension by application of a

necessary.

p a t c h on tube and rubber plug in tire casing

(3) Replace oil seal (21) and lock (19) with

puncture.

new parts.

c. Installation. Reverse procedure in a a b o v e .

c. Installation. Reverse procedure in a a b o v e

4-62. Drive Wheels and Tires

and adjust wheel bearings.

a. Removal.

d. Lubrication. Lubricate front wheel bearings

(1) Block tractor securely. Jack up rear of

as required by lubrication order and paragraph 4-9.

tractor until drive wheels just clear floor.

e. Adjustment. After installing front wheel and

(2) Remove wheel nuts (fig. 4-41) and remove

b e f o r e lowering tractor from jack, adjust front

dual wheels with assembled tires and tubes.

wheel bearings as follows:

(3) Fully deflate tires on removed drive

(1) Remove grease cap (14) and gasket (13).

wheels.

(2) Bend up sides of lock (19) and remove

(4) Remove side ring from wheel using service

outer nut (7) and lock. Discard lock.

equipment designed for this purpose. Pull ring free

(3) Tighten inner adjustment nut (7) until a

and remove tire and tube.

slight drag is felt when the wheel is turned.

4-50