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What type of bolt head on a cherokee sport

A

atlarge54

Member
I've got a relative who's working on a '98 Cherokee sport and it needs an outer bearing replaced on the front differential. He's got the ball joints undone but needs to unbolt the spindle???? He said the bolt heads are star shaped. Anybody know what kind of socket he needs?

P.S. The Jeep is surrounded by tractors if that makes any difference.

Thanks
 
Star shaped...sounds kinda/sort like a "TORX" head...which comes in "bits" as well as "sockets". NAPA/O-Reilly/Auto Zone, etc. will have them.

If NOT a TORX, then more than likely a specialty tool...SNAP-ON, etc.
 
I looked at fasteners in the McMaster-Carr book and they had some 12 point bolt heads. I haven't seen the bolts yet so I don't know what he needs. You're probably on the right track with the Torx style.

I'm hoping somebody here has worked on one and knows for sure.
 

depends if the bolt head is male or female---Jeep's have a pentalobular (had to look this up) male bolt head, and use torx female head fasteners as well. wikipedia has good info---put in torx and it should show lots of different patterns to narrow it down.
 
yah, that's right. I got me one of them funny looking loopy looking star heads that goes into that bolt. Stupid if you ask me.
I had one in the 98 Cherokee Sport when I bought it used this June.
Wish I could do pictures. sorry.
 
Jeep is famous or infamous which ever you prefer for using Torx Bolts [actually they are a Screw but what ever]as a fastner for their products.Google Jeep Torx Bolts and take your pick of the suggestions as to how to deal with them.New Torx are available at your Jeep parts source so don"t worry about damageing a bolt as that is just what will happen from many attempts to remove them.My favorite is to take a 4" grinder with a good wheel on it and grind down opposite sides of the Torx head and then take a big vise grip and snap it shut on the head.After clearing flammables from the area and having a proper fire extenguisher on hand,heat the bolt until cherry and back it out.Be careful, you can set the damn thing on fire as I did once.I never knew that grease would burn,famous last words.
 
Try a 12 pt 13mm socket. The steering knuckle on a ZJ has, three of 'em and sometimes hard to break loose. The spindle nut is a 36mm @ 175 ft/lbs. If that doesn't do it ask at jeepforum.com
 
If I'm understanding correctly...

You need to remove the axle nut(should be 36mm) and the three bolts that come into the back of the wheel bearing/hub assy(should be 12pt. 13mm).

The bearing/hub assy can be difficult to remove. If your axle shaft has u-joints...
1. turn axle shaft so u-joint is oriented like a +(as opposed to an x).
2. place a large socket between the axle tube and the u-joint yoke on the hub side of the axle shaft.
3. turn steering wheel to apply pressure from socket to rear of hub via u-joint yoke.
4. move socket to opposite side(ie: if you were on the back side, move to front) of axle tube.
5. turn steering wheel in opposite direction to apply pressure to hub again. This will gradually and evenly push the wheel bearing/hub out of the spindle.

If you're dealing with a CV type shaft instead, use a large punch to rotate the wheel bearing/hub in CW/CCW direction slightly to help loosen it from the spindle. Also apply light/penetrating oil applied between hub and spindle.

You will want to pop the ball joints as the last step in the process.

HTH and good luck!

Anthony
 
Wait a minute, I had a brain cramp.

Why are you separating the ball joints? You can replace any and all bearing on that axle without touching the ball joints.

If you're doing a wheel bearing/ hub assy, then you need to remove:
1. The wheel
2. The axle nut
3. The brake caliper and rotor
4. The wheel bearing/hub assy

If you're doing a carrier bearing in the differential, then you need to do all of the above, plus:
1. pull out the axle shaft
2. remove diff. cover
3. remove carrier bearing caps
4. remove ring gear/carrier assy

Unless you're putting in new ball joints while you've got it apart anyway?
 
Thanks to everybody. I dropped off a 1/2" drive 13mm 12pt socket which fit just fine. Looks like he had a 36mm socket for the other nut.

The bolts have had several applications of PB blaster and they still might need heat----typical suspension bolts. Looks like a coin toss which breaks first the socket or the bolt.

He gets the jeep done maybe I'll park the little allis in its place and work on it this winter.
 
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