Wheel Hub: Service and Repair

Front Hub and Disc (4WD Model)






Disassembly
1. Before disassembly, select the 2WD position with the 4WD switch.
2. Jack up the front of vehicle and support frame with jack attached.
3. Remove the two bolts from the rear side of the knuckle arm, then remove the brake caliper, with the brake hose attached.
Use a wire to attach the brake caliper to the upper link.
4. Remove Bolt.
5. Remove cap.
6. Remove snap ring and shim.
7. Remove hub flange.
8. Remove lock washer and lock screw.





9. Remove hub nut, using front hub nut wrench J-36827.
10. Remove hub and disc assembly.
11. Remove ABS sensor ring.
12. Remove outer bearing.
13. Remove oil seal.
14. Remove inner bearing.





15. Use a brass bar to remove the outer bearing outer race (1), oil seal, inner bearing and inner bearing outer race (2) from the hub.
16. Remove bolt.
If necessary, replace the wheel pin in the following manner.
^ Scribe mark (1) on the hub to disc before disassembly to insure proper assembly.





^ Clamp the hub and disc assembly in a vise, using protective pads. Remove the 6 disc-to-hub retaining bolts.





^ Place hub on a suitable work surface and remove wheel studs, as required, by using a hammer.

Inspection and Repair
Make necessary correction or parts replacement if wear, damage, corrosion or any other abnormal condition are found through inspection.
Check the following parts.
^ Hub
^ Hub bearing, oil seal
^ Knuckle spindle
^ Disc
^ Caliper
^ Shift on the fly system parts (Cap, Hub flange, Shim, Snap ring)
^ ABS sensor ring

Reassembly





1. Install wheel pin.
^ Place the hub on a wood workbench or a block of wood approximately 6" by 6" to protect the wheel stud ends and threads.
^ Insert a wheel stud using a hammer.

Note: Be sure the wheel stud is started squarely and seats completely.





2. Align scribe marks (1) and attach the hub to the disc, then tighten the bolts to the specified torque.
Torque: 103 Nm (76 ft. lbs.)





3. Install inner bearing.
Install the outer race by driving it into the hub by using installer J-36829 and grip J-8092.





4. Install outer bearing.
Install the outer race by driving it into the hub by using install J-36828 and grip J-8092.





5. Install oil seal by using installer J-36830 and grip J-8092.
Apply Multipurpose grease (NLGI No.2 or equivalent) to the lip portion.
6. Install ABS sensor ring, then tighten the bolts to the specified torque.
Torque: 18 Nm (13 ft. lbs.)
7. Install hub and disc assembly.





^ Apply grease in the hub.
^ Apply wheel bearing type grease NLGI No. 2 or equivalent to the outer and inner bearing.

Grease Amount








Hub 35 grams (1.23 ounces)
Outer bearing 10 grams (0.35 ounces)
Inner bearing 15 grams (0.53 ounces)





8. Install hub nut.
Turn to the place where there is a chamfer in the tapped hole to the outer side, then attach the nut by using front hub nut wrench J-36827.

Preload Adjustment
1. Tighten the hub nut to 29 Nm (22 ft. lbs.), then fully loosen the nut.
2. Tighten the hub nut to the value given below, using a spring scale on the wheel pin.





New bearing and New oil seal 19.6 - 24.5 N (4.4 - 5.5 lbs.)
Used bearing and New oil seal 11.8 - 17.7 N (2.6 - 4.0 lbs.)





If the measured bearing preload is outside the specifications, adjust it by loosening or tightening the hub nut.





9. Install lock washer and lock screw.
^ Turn the side with larger diameter of the tapered bore to the vehicle . outer side, then attach the washer.
^ If the bolt holes in the lock plate are not aligned with the corresponding holes in the nut, reverse the lock plate.
^ If the bolt holes are still out of alignment, turn in the nut just enough to obtain alignment.
^ Screw is to be fastened tightly so its head may come lower than the surface of the washer.

10. Apply adhesive (LOCTITE 515 or equivalent) to both joining flange faces then install hub flange.





11. Install snap ring and shim.
^ Adjust the clearance between the free wheeling hub body and the snap ring.
Clearance: 0 mm - 0.3 mm (0 inch - 0.012 inch)
Shims Available: 0.2 mm, 0.3 mm, 0.5 mm, 1.0 mm (0.008 inch, 0.012 inch, 0.020 inch, 0.039 inch)

12. Install hub cap.
13. Tighten the bolts to the specified torque.
Torque: 59 Nm (43 ft. lbs.)
14. Install brake caliper and tighten fixing bolt.