Front wheel bearing and spindles

Front wheel bearing



Refer to Figs. 1 and 2 for typical wheel hub and bearing assemblies.
The tapered inner and outer roller bearings are not interchangeable. Clean and inspect bearing cups (3 and 5) and cones (2 and 6) and renew as necessary.
On adjustable axle hubs, if wear ring (12) Is excessively worn, renew wear ring.




Fig,1—Exploded view of front wheel hub and bearings used on all two-wheel drive models equipped with adjustable front axles
1.Oil seal 2.Bearing cone (inner) 3.Bearing cup 4.Hub 5.Bearing cup 6.Bearing cone 7. Washer (inner) 8. Cotter pin 9. Castellated nut 10. Cap (outer)
11. Lug bolt 12. Wear ring 13. Lug nut




Fig. 2—Exploded view of front wheel hub and bearings used on two-wheel drive models equipped with nonadjustable (cast) front axle. Refer to Fig. 1


Install inner seal (1) on spindle and coat lips of seal with grease. Pack bearings and fill hub cavity with No. 2 lithium grease. Install inner bearing cone (2). Install hub assembly (4), outer bearing cone (6), washer (7) and nut (9). Adjust wheel bearing preload as follows: Tighten nut to a torque of 70 ft.-lbs. (95 N-m) while rotating the hub. Then, loosen nut and retorque to 50 ft.-lbs. (68 N-m) on Models with standard axles or 25 ft.-lbs. (34 N-m) on Models equipped with heavy duty axles and Model tractors. Then, loosen nut 1/4 turn to align slot in nut with hole in spindle and install cotter pin (8). Install lithium grease in end of hub and in cap (10) and install cap.


Spindles



With Adjustable Axles


To remove either spindle (9-Figs. 3, 4 or 5), block rear wheels securely and apply park brake. Raise front of tractor and install jack stand under axle main member (13). Unbolt and re­move front wheel and hub. Disconnect tie rod from steering arm (2 or 6). Remove bolt (1) and nut (3) and lift off steering arm. Remove Woodruff key (11) and lower spindle (9) with thrust bearing (8) and felt ring (10), downward out of axle extension. Remove thrust bearing and felt ring from spindle.




Fig. 3—Exploded view of straight adjustable front axle used on some tractors.
1. Bolt 2. Steering arm (R.H.) 3. Nut 4. Axle extension (R.H.) 5. Axle extension (L.H.) 6. Steering arm (L.H.) 7. Bushings 8. Thrust bearing 9. Spindle 10. Felt ring 11. Woodruff key 12. Shoulder bolt  13. Axle main member  14. Bushings  15. Pivot pin  16. Cap screw (2)  17. Steel bushings  18. Bushings  19. Steering arm (center) 20. Steering cylinder retaining bar  21. Lockplate  22. Cap screw (2)


With spindle removed, check spindle bushings (7) in axle extension for excessive wear or other dam­age and renew as required, Install new bushings (7) so that lubrication grooves are toward the grease fit­ting. Drive bushings in from top and bottom of ex­tension until each bushing is 0.060 inch (1.5 mm) be­low the surface.




Fig.4—Exploded view of heavy duty straight adjustable front axle used on some tractors. Refer to Fig.3


When reassembling, install new felt ring (10) and thrust bearing (8) as necessary.  Thrust bearing (8) is marked TOP for cor­rect installation.




Fig.5—Exploded view of swept back adjustable front axle used on some tractors. Refer to Fig.3 for legend except for tie rod assembly (23)


Install spindle assembly, Woodruff key and steer­ing arm. Tighten steering arm clamping bolt to a torque of 80-90 ft.-lbs. (108-122 N-m). Install tie rod and tighten nut to a torque of 50 ft.-lbs. (68 N-m). Check oil seal (1—Fig. 1) and renew as necessary as outlined. Install hub and adjust bearings.


Models With Nonadjustable Cast Axle


Remove either spindle (11— Fig. 6), block rear wheels securely and apply park brake. Raise front of tractor and install jack stand un­der axle main member (16). Unbolt and remove front wheel and hub.




Fig.6—Exploded view of heavy duty (cast) nonadjustable front axle used on some tractors


Remove lubrication fitting from steering arm (5 or 10). Remove three bolts (22) and nuts, then move steering arm, steering cylinder (left side) and tie rod rearward from axle. Remove cap screws (1), caps (2) and gaskets (3). Remove nut and lockwasher from lock pin (15). Drive lock pin forward out of axle main member. Using a hammer and punch, drive kingpin (12) out of axle and spindle. Remove spindle, thrust bearing (14) and shim (13) if so equipped.
Inspect kingpin bushings (4) and renew if neces­sary. Bushings should be installed until inner ends of bushings are 0.016-0.031 inch (0.4-0.8 mm) below the inside surfaces of spindle bores. Lubrication grooves in bushings must align with lubrication fittings.
Install a new thrust, hearing (14), with TOP mark up, on bottom inside edge of spindle. Install spindle over end of axle main member with thrust bearing under axle. Use a jack to hold spindle and bearing tight against bottom of axle. Using a feeler gage, measure gap between upper edge of axle and the spindle. If gap is more than 0.005 inch (0.127 mm), install shims to reduce gap to less than 0.005 inch (0.127 mm). Shims are available in thicknesses of 0.005 and 0.010 inch (0.127 and 0.254 mm).
Inspect kingpin (12) and renew as necessary. Install kingpin with flat nearest to the top and in alignment with hole for the lock pin (15). Install lock pin, lock-washer and nut. Tighten nut securely. Install steer­ing arm and tighten bolts (22) and nuts to a torque of 160-180 ft.-lbs. (217-244 N-m). Install lubrication fitting in steering arm.
Check oil seal (1—Fig. 2) and install new seal, if needed, then install hub and adjust bearings as out­lined.