Jeep CJ/Scrambler 1971-1986 Repair Guide

Locking Hub Service

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See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11

Jeep vehicles through 1979 were not factory equipped with locking hubs. Locking hubs were a dealer installed option or installed by the owner after purchase. Beginning in 1980, factory installed hubs were offered.

1971-79

The following is a general service procedure that should apply to all types. Locking hubs should be lubricated at least once a year and as soon as possible if running for extended periods submerged in water. The same type of grease should be used in the locking hubs as is used on the wheel bearings. EP lithium based chassis lube is preferred.

  1. Remove the lockout screws and washers.
  2.  
  3. Remove the hub ring and knob.
  4.  
  5. Remove the internal snapring from the groove in the hub.
  6.  
  7. Remove the cam body ring and clutch retainer from the hub and disassemble the parts.
  8.  
  9. Remove the axle shaft snapring. It may be necessary to push in on the gear and pull out on the axle with a bolt to make the snapring removal easier.
  10.  
  11. Remove the drive gear and clutch gear. A slight rocking of the hub may make them slide out easier.
  12.  
  13. Remove the coil spring and spring retainer.
  14.  
  15. Clean all the components in a safe solvent. Wipe out the hub with a clean cloth.
  16.  
  17. Grease the inside of the hub liberally.
  18.  
  19. Install the spring retainer ring with the undercut area facing inwards. Be sure it seats against the bearing.
  20.  
  21. Install the coil spring with the large end going in first.
  22.  
  23. Install the axle shaft sleeve and ring and the inner clutch ring with the teeth of both components meshed together in a locked position. It may be necessary to rock the hub to mesh the splines of the axle with those of the axle shaft sleeve and ring. Keep the two gears locked in position.
  24.  
  25. Install the axle shaft snapring. Push in on the gear and pull out on the axle with a bolt to allow the snapring to go into the groove.
  26.  
  27. Install the actuating cam body ring into the outer clutch retaining ring and install them in the hub.
  28.  
  29. Install the internal snapring.
  30.  
  31. Apply a small amount of Lubriplate® grease to the ears of the cam.
  32.  
  33. Assemble the knob in the hub ring and assemble them to the axle with the knob in the locked position. Tighten the screws and washers evenly and alternately, making sure the retainer ring is not cocked in the hub.
  34.  
  35. Torque the screws to 40 inch lbs.
  36.  



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Fig. Fig. 1: Remove the bolts retaining the hub body



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Fig. Fig. 2: Remove the hub body



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Fig. Fig. 3: Remove the snapring from the axle shaft



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Fig. Fig. 4: Remove the cam assembly from the axleshaft



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Fig. Fig. 5: With the cam assembly out of the way, you can see the outer locknut



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Fig. Fig. 6: Use a socket to loosen the locknut



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Fig. Fig. 7: Remove the outer locknut from the axle shaft



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Fig. Fig. 8: Remove the outer tang washer from the axle shaft



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Fig. Fig. 9: Remove the inner locknut and then the inner tang washer



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Fig. Fig. 10: The hub and rotor assembly can now be removed for service



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Fig. Fig. 11: View of the locknuts, tang washers, hub and rotor assembly

1980-86

  1. Remove the bolts and lockwashers attaching the hub body to the axle.
  2.  
  3. Remove the hub body and discard the gasket.
  4.  


WARNING
Do not turn the hub control dial after removed!

  1. Remove the retaining ring from the axle shaft.
  2.  
  3. Remove the hub clutch and bearing assembly.
  4.  
  5. Clean and inspect all parts.
  6.  
  7. Lubricate all parts with chassis lubricant. DO NOT PACK THE HUB WITH GREASE!
  8.  
  9. Install in reverse of removal. Torque the retaining nuts to 30 ft. lbs.
  10.  

 
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