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+--- Thread: Parking brake broke? wtf?? (/showthread.php?tid=3848)
Parking brake broke? wtf?? - sassparilla_kid - 08-15-2012
Soooo my dad's w123 had the rear passenger wheel lock up the other day while driving, had to get it towed home. I just got around to looking at it a little earlier, thought maybe it was something with the differential, then noticed the cv boots were all cracked and thought maybe one ran out of grease and seized up, but that wasn't it either.
I noticed the hub turns without any lug bolts in it, or at least not in it all the way. I pulled the caliper off, and then the rotor, and noticed the bolt is hitting on this thing (picture is more or less from the bottom looking up)
It looks like part of the mechanism for the parking brake, but I can't find any diagrams to find more about it
I measured the clearance as best I could between it and the back of the hub or whatever (where the lug bolts come through) and it is ~.28". I don't really feel like taking the other side off right now to compare with, because it is warm outside (hell would be a day in the park compared to this heat) and I am a little tired from working 12 hour days 7 days a week
There is also a bite or chunk taken out where the bolt hit it.
SO my guess is that this thing broke and moved inside of the hub while driving, causing the lug bolts to collide with it and lock the wheel up?? That or the lug bolts grew in length, which seems pretty unlikely.
Can anybody tell me more about this thing, or any procedure on how to change out the parking brake mechanisms and stuff, I can't really seem to find anything other than changing the shoes
Thanks folks
RE: Parking brake broke? wtf?? - Hercules - 08-16-2012
Measure how far the lug bolts stick through the drive hub.Seems like bolts poss.too long. ( Rim change).
Too long of lug bolt might not hit intill parking brake left on some while moving or applied while moving.
If center section of apply lever is free ,may still be ok.
To remove shoes,pop off lower spring,remove shoe hold ins(Push in turn 1/4 turn) may need to attempt several times. Hole in hub for this On
re installing,Avoid using needle nose pliers on that lower spring could lose an eye!!!!
Never seen one of these brake,almost bullet prof . Should keep shoes adjusted up at maintenance levels. Also ck free movement of parking cable, lever and spring return,(under rear of car). Happy rolling.
RE: Parking brake broke? wtf?? - sassparilla_kid - 08-16-2012
Thanks I'll check it out in a bit. It just seems odd that it suddenly did this
RE: Parking brake broke? wtf?? - Hardpan - 08-17-2012
That's it, Herc. Thanks! Seems there's a separate set of log bolts (shorter!) for the spare. The spare's mounted on a stamped steel wheel, FAR thinner than the cast aluminum of the "bundt"... Duh...!
Had a flat tire at high speed, stopped, changed, and the car would then move only about 4 inches... Towed it home and pondered.
Somewhat fortuitous, though, as Sassparilla discovered the torn CV boots as well as broken exhaust hangers. Far less traumatic than a broken differential gear - MY first thought!
RE: Parking brake broke? wtf?? - blackslide - 09-10-2012
Lesson learned, swap the front tire into the back, install the spare in the front. Works with all kinds of wheel bolts.
I'm glad that the damage wasn't too severe, those bolts could have made quite some damage if they would've protruded into the parking brakes just a bit more.
RE: Parking brake broke? wtf?? - sassparilla_kid - 09-12-2012
Yeah, now I just have to fix the big hole in the tyre where it hit a nail or something. And change the bad axles haha