Need Help With K2500 Front Rotor ... Please!

[Ace Greenberg]

My diesel K2500 needs a new r.f. rotor, but I can't get the old one off. There is a typical coating of rust on the studs where they go through the rotor and probably a lot between the hub and rotor and I just can't break them loose from each other.

Is there a trick to this that I'm missing? I've even tried hitting the back of the rotor with a rubber mallet and it doesn't budge. Is there some kind of solvent that'll help?

Thank you,
Ace

[Jeremy-WI]

PB Blaster does a good job, and Aero Kroil works good too- just harder to find. Should be able to spray it down at night and remove the next morning

[jeverett]

If that doesn't work, you can try...heating it lightly with a torch..just heat the area around the studs a bit and hit it like you have been with the mallet.

[buttnekked]

heat and penetrating oil are your best bets. one question, Does it have to thread holes opposite of each other? I have seen some rotor setups (various nameplates) that you need to thread bolts in against the hub face to push rotor off center of hub.

[99ssconv]

You Have To Remove The Hub Assembly And Remove The Wheel Studs To Remove The Rotor.

[Ace Greenberg]

Originally Posted by 99ssconv

You Have To Remove The Hub Assembly And Remove The Wheel Studs To Remove The Rotor.

Thanks, I just spent about 30 mins. trying to see if I could figure a way to get that off when I was looking at the back of the rotor through the caliper opening in the mounting plate and realized that the parts are joined together.

I assume that means I should replace those studs afterwards, is that true? Could you tell me how to get that thing off? I tried following some instructions from a Chilton CDROM that I have, it said "using a puller, force the outer end of the axle shaft out of the hub. Remove the hub. "

When I tried to do that, I was able to force the axle shaft into the hub about to the point where the shaft end was just shy of protruding from the center of the hub/rotor. But, I still couldn't budge the hub/rotor. Is there some sort of fastener still holding it on there? I was afraid to push the axle back any further as the outer CV joint was pretty much flexed to the limit and turning the puller went from very easy to very hard.

I've never been stumped by a brake job like this one and that includes my 1990 diesel K1500 - I had to disassemble the auto-locking hubs to get those rotors off and then I had to pound like hell on the 6 studs to take the rotor/hub apart. That was an easy 3+ hours of torture. For EACH ONE!

Thanks for your reply.

[ffscott]

Originally Posted by Ace Greenberg

Thanks, I just spent about 30 mins. trying to see if I could figure a way to get that off when I was looking at the back of the rotor through the caliper opening in the mounting plate and realized that the parts are joined together.

I assume that means I should replace those studs afterwards, is that true? Could you tell me how to get that thing off? I tried following some instructions from a Chilton CDROM that I have, it said "using a puller, force the outer end of the axle shaft out of the hub. Remove the hub. "

When I tried to do that, I was able to force the axle shaft into the hub about to the point where the shaft end was just shy of protruding from the center of the hub/rotor. But, I still couldn't budge the hub/rotor. Is there some sort of fastener still holding it on there? I was afraid to push the axle back any further as the outer CV joint was pretty much flexed to the limit and turning the puller went from very easy to very hard.

I've never been stumped by a brake job like this one and that includes my 1990 diesel K1500 - I had to disassemble the auto-locking hubs to get those rotors off and then I had to pound like hell on the 6 studs to take the rotor/hub apart. That was an easy 3+ hours of torture. For EACH ONE!

Thanks for your reply.

look on the back side of the hub there should be 4 bolt that hold the roater to the hub. after you remove the bolts the hole assembly should come off. after removing the roter you should replace the studs, youshould replace the wheel barings also. I had the same problem with my 2500. you shouldn't have to heat anything up or have to pound on it.Good luck