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| Changing the front discs - anything to be careful about? http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=56101 |
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| Author: | striperman36 [ Thu Oct 07, 2010 10:18 pm ] |
| Post subject: | Changing the front discs - anything to be careful about? |
The mule needs new rotors and pads. I'm doing it Saturday. Anything to be careful about other than not breaking the brake line? What size is the caliper bolt? It's an allen right? Bill |
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| Author: | warp2diesel [ Fri Oct 08, 2010 12:03 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
Use good parts and CLEAN off the hub with a wire brush and remove all the loose rust. Clean off your components and if you live in the rust belt, use anti seize on the track where the pads slide. I used the Wagner rotors and ceramic pads from O'Reiley with no problems. |
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| Author: | audiboy86 [ Fri Oct 08, 2010 12:10 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
The caliper bolts are 21mm hex heads not allens and there are two of them. If this is your first time i would suggest a short breaker bar and a really nice slow and steady pull. Also kinda hard to get a racket in some spots so i would suggest an open end wrench. |
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| Author: | striperman36 [ Fri Oct 08, 2010 7:56 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
thank you I'll post how it goes |
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| Author: | warp2diesel [ Fri Oct 08, 2010 8:02 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
audiboy86 wrote: The caliper bolts are 21mm hex heads not allens and there are two of them. If this is your first time i would suggest a short breaker bar and a really nice slow and steady pull. Also kinda hard to get a racket in some spots so i would suggest an open end wrench. 21mm is typo, they are 12mm. You may need to hold the slide plungers with a slim 15mm wrench. |
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| Author: | tjkj2002 [ Fri Oct 08, 2010 8:42 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
warp2diesel wrote: audiboy86 wrote: The caliper bolts are 21mm hex heads not allens and there are two of them. If this is your first time i would suggest a short breaker bar and a really nice slow and steady pull. Also kinda hard to get a racket in some spots so i would suggest an open end wrench. 21mm is typo, they are 12mm. You may need to hold the slide plungers with a slim 15mm wrench. The caliper bolts are 12mm,the caliper mount bolts are 21mm,and never use a open end wrench unless you want to round off bolt heads.Do not use antiseize on any brake component bolts,loctite is okay and encouraged. |
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| Author: | Rixram [ Fri Oct 08, 2010 9:19 am ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
warp2diesel wrote: Use good parts and CLEAN off the hub with a wire brush and remove all the loose rust. Clean off your components and if you live in the rust belt, use anti seize on the track where the pads slide. I used the Wagner rotors and ceramic pads from O'Reiley with no problems. Not trying to hijack, but you bring me to a question. I should be getting better mileage than what I am. When I was replacing my emergency brake pads, I had all 4 wheels off and the Tractor up on jacks. Put in 4-low, and the front brakes seemed to be "grabbing" the rotors. I'm assuming (bad, I know) that replacing the front calipers are pricey. Anyone know for sure? Is there a less costly method of fixing the grabbing issue? |
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| Author: | papaindigo [ Fri Oct 08, 2010 2:08 pm ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
Check the "pins" the calipers slide on and the associated rubber boot. GDE has a post on this. Apparently these can get dirty in which case the calipers won't let the pads retract enough to clear the rotor so the brakes drag. If the rotors are not completly true then the brakes will "grab" each time the "high" spot comes around. Also note that disc brake pistons that are not stainless steel can expand over time and bind in the bore which also causes grabbing on slightly out of round rotors. A not uncommon problem just after a brake job that did not involve installing new or rebuilt calipers. I've experienced this on several vehicles including a Dodge D250 Cummins which had the most interesting front end hop until I figured out my brakes were to blame and installed new calipers. Neither of the above issues are unique to the CRD or even to Jeep/Chrysler. |
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| Author: | striperman36 [ Fri Oct 08, 2010 2:42 pm ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
I've seen in the forums here when I did a search on front brakes that alot of people do pads,calipers and rotors when they do the change. I'm just diving in so I am hoping for another decent encounter with my crd. The MAP, EHM, ORM and oil change have all be super easy and thanks to this board, have turned out well. If I can get the pads and rotors changed without issues I'll be feeling good I also have a closed racheting socket wrench set so I am planning on using those along with my metric socket set. I am gradually collecting all metric tools for this thing that go in a seperate work box specifically for the CRD. |
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| Author: | striperman36 [ Sat Oct 09, 2010 1:51 pm ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
2 hours 20 min first time around, the 1st one was the hardest I think the second one took me 20 min. It is a 21 mm for the brake caliper (2) bolts and the top one is a pain. Nice new rotors and pads at 120 bucks! Don't say anything about the new 1/2 in metric set ssshhhhhhh  Thank you for all the input. |
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| Author: | jinstall [ Sat Oct 09, 2010 2:04 pm ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
tjkj2002 wrote: warp2diesel wrote: audiboy86 wrote: The caliper bolts are 21mm hex heads not allens and there are two of them. If this is your first time i would suggest a short breaker bar and a really nice slow and steady pull. Also kinda hard to get a racket in some spots so i would suggest an open end wrench. 21mm is typo, they are 12mm. You may need to hold the slide plungers with a slim 15mm wrench. The caliper bolts are 12mm,the caliper mount bolts are 21mm,and never use a open end wrench unless you want to round off bolt heads.Do not use antiseize on any brake component bolts,loctite is okay and encouraged. Caliper lube and Copper paste is what is used on the caliper slide bolts and can be used on the pad slide clips. Loctite is a BRAND NAME not a specific item. |
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| Author: | striperman36 [ Sat Oct 09, 2010 4:17 pm ] |
| Post subject: | Re: Changing the front discs - anything to be careful about? |
getting the pads in the clips is a real PITA. |
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