|
|
Parking Brake not working after replacing calipers
|
|
|
| |
|
|
JoeG_Sr
User
Feb 2, 2014, 11:32 AM
Post #1 of 34
(3490 views)
|
|
Parking Brake not working after replacing calipers
|
Sign In
|
|
2000 Tahoe (new body style), 90K miles.
Background. I had just changed the rear pads on my 2000 Tahoe after which they smoked on an intermittent basis. It was suggested here that I replace the calipers because they have a history of sticking.
Well I finally had the money to do that along with new pads.
I checked out the parking brake shoes and they looked fine with plenty of thickness less. There was no cracking or uneven wear (to my untrained eyes).
Put everything back together and now I don't have a parking brake. The pedal easily goes all the way to the floor and doesn't prevent the truck from moving.
I checked and when the pedal is pressed to the floor the cable moves the mechanism moves on each rear brake. The mechanism also disengages when the parking brake is released.
The parking brake was working before I did all this because I had to disengage it to remove the rotor.
What could I have done in replacing the caliper/removing the rotor that could have caused the parking brake to no longer work?
I've looked and you have to remove the rotor to adjust the parking brake mechanism. I didn't touch any of that mechanism while I had the rotor removed.
Thanks
(This post was edited by JoeG_Sr on Feb 2, 2014, 11:33 AM)
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 2, 2014, 11:43 AM
Post #2 of 34
(3480 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Before you wreck your new pads toss the rotors. That little drum brake inside will be messed up no doubt and unless you drag those holding park release now and then are just a rusted or dirt filled mess. They are static not rubbing to self clean friction surface so always suk. Not such a bright idea but a few did that, that way.
Do hardware too. No telling if you can reuse the shoes till you are there. DON'T adjust the cable but adjust those from inside as the cable adjustment should be fine and if needed do that adjustment after you get it right at the wheel. The mid ship cable adjuster if not lubed will be a pest or break so get ready for a domino effect.
Your call to toss the flex hoses too. Not doing it right the first time as in not servicing or replacing rotors just makes you start all over again later or earlier plus don't work well and might not break in to rotor's imperfections,
T
|
|
| |
|
|
JoeG_Sr
User
Feb 2, 2014, 2:07 PM
Post #3 of 34
(3460 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Tom
OK. Good idea to replace the rotors.
But why would I have lost adjustment on the parking brake by just taking off the rotor?
Thanks
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 2, 2014, 2:41 PM
Post #4 of 34
(3456 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Chances are it gave you some "persuasion" to get rotor off pulling on the shoes and hardware. If adjusted fell out of place on one I don't think you get either side.
The shoes MUST stay in place with a hold-down spring. If tilted it doesn't take but a few miles and they are toast! Went thru this with a 2001 (I think) under warranty and they flucked it up and wouldn't mess with it twice as it worked to get off the lot and nobody up for a fight about it - brand new, no time as it was towing a boat and you can't be without on boat ramps.
At least, caliper off again with bracket needed to remove rotor entirely - I think. You should see the problem staring at you when right there.
Remember it's a "static" brake not generally ever used while wheel is turning so by rights should never wear out except for already mentioned broken or perhaps hardware that fell out of place somehow. I just know those dang little shoes don't last if rubbing/working and can do it such that you don't really notice.
Do yourself a favor when you are at these things. Use a smear of brake lube on the hub so it doesn't fight you again and good lube of the correct places of calipers EVERY time you may have them off. DO NOT LUBE THE BRAKET BOLTS as they need to be stuck and tight.
I really think you'll plain see the trouble. Try something. Pull on cable and you might see which side moves more pulling midway under vehicle and do that one first to see what happened. Suks but still always best to replace things in pairs - both sides get the same,
T
|
|
| |
|
|
JoeG_Sr
User
Feb 9, 2014, 7:22 AM
Post #5 of 34
(3387 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
OK. Took it all apart. The e-brake shoes were nearly as thick as the new shoes so I didn't replace them. I had to adjust the e-brake mechanism and now have a working parking brake.
But now here is my concern. I installed new caliper and brackets, pads and now new rotors.
The outside pad barely fit between the rotor and the bracket (in fact I installed the outside shoe before bolting the bracket back on) and the inside pad is only being held in place by the tip of the pad. It seems like as the pad wears it will fall off the bracket.
It's like the entire assembly is off by about 1/8 - 1/4". What could I be missing?
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 7:36 AM
Post #6 of 34
(3382 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
? You may have wrong parts? Caliper and new pads can be real close when all is new so I'll take that. One good stop and that would settle in just right by itself if all was really good. E-brake really should have been right for new rotors and dunno why but if for some reason you adjust that right at it there not the cable going to it part so fast.
Does each wheel spin freely by hand? Yes you have to either hoist or be in neutral and know if e-brake or service brake is dragging if so. You do this stuff in order - e-brake set first if anything needed then put on service brake installed so it's not confusing anything.
I didn't design this two brakes in one rotor idea but it wasn't up to me. They work when done right and tended to thru the life of the parts involved,
T
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 8:40 AM
Post #7 of 34
(3378 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Is the rotor riding in center of the gap in the bracket?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 9:19 AM
Post #9 of 34
(3371 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
That means you either have the wrong rotor or it's not fully seated.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 9:37 AM
Post #10 of 34
(3368 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
? Something's all wrong. First year of that style TMK. There were problems with parking brake clip right away on some, think it was a 2001 w two left handed hold-down clips for the parking brake that wore it out in no time from new tilting the shoes.
IDK if there was a HD option and you got that rotor or regular duty or what was possible for a Tahoe. Just by smell I think since you had to mess with the little drum adjustment and now that bracket wasn't centered it's the wrong rotor. In wrong box or any reason. It happens.
What to do? Perhaps take rotors back and check with another pair OR if you have the old ones compare them. Can only guess by the trouble you are having - wrong rotors likely is my call so far now,
T
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 9:40 AM
Post #11 of 34
(3364 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
You should be able to just take the rotor off and sit it next to the old one and compare the height.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
JoeG_Sr
User
Feb 9, 2014, 10:42 AM
Post #12 of 34
(3357 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
The lack of parking brake had nothing to do with the new rotors. Last week after replacing the calipers and brackets I no longer had a functioning parking brake. All I did last week was take the rotor off to look at e-brake shoes. Tom suggested replacing the rotors so I did that this weekend and adjusted the parking brake at the same time.
Am I certain I had a parking brake before replacing the calipers last week No. but it did pass inspection and they are supposed to check the parking brake.
I measured the new rotors and they are identical to the old ones. This year came with 19 mm or 30 mm thick rotors (mine are 19 mm) and the overall height of the rotors is the same.
Here's a picture of the pad position. This is better than when I first installed them (the rotor must not have been completed seated until the put the tire on) but you can see the inside pad is at the edge of the bracket.
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 11:06 AM
Post #13 of 34
(3353 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
I don't see any problem at all there. You likely didn't have the rotor fully seated when you were putting it together and putting the wheel on seated it. It stays loose until the lug nuts lock it down.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
JoeG_Sr
User
Feb 9, 2014, 11:37 AM
Post #14 of 34
(3346 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
The inside brake pad is still overhanging the inside of the bracket by about 1/2 the width of the knob of the pad. See the yellow line inside the yellow circle. Whereas the outside pad is right in the middle of the bracket.
It seems that as the pad wears away, it could fall out of the bracket.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 11:45 AM
Post #15 of 34
(3342 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Maybe my eyesight but metal backing plate (low in pic) of inner pad looks only partly on the "land" area that holds it in place. Rotor might not be fully seated? If that is set there to me it looks like with wear it wouldn't be held in place? Dang, being right there would be nice with it in hands!
You can put a few lug nuts back on taper side out and usually get hub of rotor fully in place about as if wheel was on and tight.
If hub surface was crusty enough with rust it should have been scraped off totally clean. Some can be quite badly rusted, flakes fall down unseen and rotor would be untrue even when tightened up if so.
This should not be this much trouble so I'm missing something,
T
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 11:46 AM
Post #16 of 34
(3339 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
I was typing and a phone call when you noted what I saw. That isn't right,
T
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 11:51 AM
Post #17 of 34
(3334 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Get off the phone darnit...LOL
You can see the rotor is cocked because it probably isn't seating all the way on the hub which will cause the pads to be out of position. All that stuff should be centered up when you bolt the wheel on.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Feb 9, 2014, 11:51 AM)
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 11:55 AM
Post #18 of 34
(3329 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
I can't really see the area you are referring to there and there appears to be about 3 different designs for that year. Did you match all the new parts with the old ones?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 12:01 PM
Post #19 of 34
(3319 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
I can't help the dang phone DS! LOL. OP - don't tighten that up with wheel it has to be right and might jam caliper against inside of wheel.
THIS MUST BE RIGHT NO GAMES OF COURSE AS IT'S BRAKES. NOT READY TO GO AT ALL.
Start over with bracket caliper, rotor off and just feel the rotor bottom out on hub with nothing else in place. Put lug nuts on to hold rotor as mentioned earlier. If still wrong could be back to wrong rotor or not seating on hub. Dishing of it just isn't close to right - do not drive it till it is,
Tom
|
|
| |
|
|
JoeG_Sr
User
Feb 9, 2014, 12:56 PM
Post #20 of 34
(3309 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Took everything off. Cleaned the hub. Put the rotor and bracket back on and put a few lugs on.
Still a big gap difference between the inside and outside of the rotor.
However, when I put the pads in place, the knob of the inside pad no longer hangs over the bracket. In fact, its probably "inside" the edge of bracket by about 1/16".
Not sure you can see that in this picture.
I'll still head to the part store to see if there is a different bracket. This year came with single or dual piston caliper (mine is dual) and the 19 mm or 30 mm thick rotor. Almost seems like the bracket I got is suited for a thicker rotor.
Thanks for everyone's help!!!
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 1:00 PM
Post #21 of 34
(3305 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
Looks to me like you might have the clips on backwards. Try swapping top and bottom.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 1:00 PM
Post #22 of 34
(3304 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
That sure isn't right. Those years of GM trucks and vans are a pain in the arse to get the right parts for because they had so many options.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 9, 2014, 1:16 PM
Post #23 of 34
(3291 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
That bracket is redone and they want the old one. That alone could be the problem? It's NOT right. Call store if you left old ones to hold and mark them. Something is wrong totally. Just shat luck.
Please - we are on this but can't always sit on this place so do get this centered whatever it takes and right now I say wrong parts again, Tom
|
|
| |
|
|
JoeG_Sr
User
Feb 10, 2014, 11:51 AM
Post #24 of 34
(3273 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
The parts store still had my core. So we measured it against a "new" one. Identical. Just to confirm, I brought my old one home and installed. Same thing.
There is no difference in the bracket for the 19 or 30 mm thick rotor so it has to accommodate both. So it leaves a big gap on the 19 mm. Just looks like an accident waiting to happen.
Again. Thanks for everyone's help.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 10, 2014, 2:10 PM
Post #25 of 34
(3265 views)
|
|
Re: Parking Brake not working after replacing calipers
|
Sign In
|
|
OK - Then rotor is not on properly somehow or not correct rotor. Not just thickness but depth of the dishing of it meaning how deeply it hovers over hub to clear wheel. That, bracket, caliper must be operational and in range for worn or new parts and pics shown it isn't right now. IDK, for all I know rotor is for front not rear or just wrong if bracket is identical to old one,
T
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
WhatsApp: +40799442365 BUY CANADIAN DRIVER’S LICENSE.
1
