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Hey guys! hope everyone is all and well. Anyways I have found myself in a shitty situation. I’m working on a 2010 toyota venza AWD model. As the title says the rear rotors are stuck on the parking brakes (it’s the design with the drums inside the rotor).
Here’s what i’ve done so far:
1. Made sure the parking brake is off
2. Have tried to adjust the star wheel so that it moves in but it doesn’t seem to be doing anything (I don’t know if they’re the same as the star wheels on drums but if they are they would have the little metal arm that clicks in between the teeth of the wheels correct? so then that would mean that the way it moves easily is to adjust outward and the only way to adjust in would be to lift the arm and rotate up right? I have tried looking for an access hole in the backing plate but there doesn’t seem to be one.
3. I have tried to use the threaded holes on the rotors to push them off but all i heard was a popping noise and later came to find out that was the pin holdng it to the backing plate that went POP! At this point I can’t put it back together and say forget about it and do it another day. I’ve passed the point of no return. I have read many threads dealing with this problem and as far as i can see i have a few options:1. Hammering it off from the back and hope nothing expensive breaks
2. continue to play with the star wheel in hopes something happens
3. torch it (I don’t have access to a torch that would heat it up enough though so I don’t think this option is going to work.)I need to get this done by Sunday night because it needs to be on the road for Monday. Any suggestions would be greatly appreciated. Thanks in advance!
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[quote=”Phoenix-9-7″ post=163829]Hey guys! hope everyone is all and well. Anyways I have found myself in a shitty situation. I’m working on a 2010 toyota venza AWD model. As the title says the rear rotors are stuck on the parking brakes (it’s the design with the drums inside the rotor).
Here’s what i’ve done so far:
1. Made sure the parking brake is off
2. Have tried to adjust the star wheel so that it moves in but it doesn’t seem to be doing anything (I don’t know if they’re the same as the star wheels on drums but if they are they would have the little metal arm that clicks in between the teeth of the wheels correct? so then that would mean that the way it moves easily is to adjust outward and the only way to adjust in would be to lift the arm and rotate up right? I have tried looking for an access hole in the backing plate but there doesn’t seem to be one.
3. I have tried to use the threaded holes on the rotors to push them off but all i heard was a popping noise and later came to find out that was the pin holdng it to the backing plate that went POP! At this point I can’t put it back together and say forget about it and do it another day. I’ve passed the point of no return. I have read many threads dealing with this problem and as far as i can see i have a few options:1. Hammering it off from the back and hope nothing expensive breaks
2. continue to play with the star wheel in hopes something happens
3. torch it (I don’t have access to a torch that would heat it up enough though so I don’t think this option is going to work.)I need to get this done by Sunday night because it needs to be on the road for Monday. Any suggestions would be greatly appreciated. Thanks in advance![/quote]
Can you take the rear knuckle off of the car and over to a bench vise to get a better hold on it? Did you make sure the parking brake wasn’t adjusted too tightly (from inside the car)? Penetrating oil does help btw, and hammer blows to the front “hat” of the rotor help to break that corrosion.
I don’t have a vice in my garage but I know a few people with a vice, as far as taking off the knuckle how would that help my situation? I’d rather not have to do that but if that’s all I can do then i’ll get cracking I guess. As far as checking the parking brake from the inside of the vehicle how would I go about doing that? it is a pedal not a lever. Ill try the penetrating oil but I was afraid it would collect all the dust and it would gum it up.
[quote=”Phoenix-9-7″ post=163831]I don’t have a vice in my garage but I know a few people with a vice, as far as taking off the knuckle how would that help my situation? I’d rather not have to do that but if that’s all I can do then i’ll get cracking I guess. As far as checking the parking brake from the inside of the vehicle how would I go about doing that? it is a pedal not a lever. Ill try the penetrating oil but I was afraid it would collect all the dust and it would gum it up.[/quote]
Its probably a standard Toyota parking pedal mechanism:
The knuckle is a LAST resort. Try hammering around the top of the “hat” (in between the studs basically) when I worked on my sister’s Mazda the rear brakes REFUSED to come off, so I used some penetrating oil and hammered around the studs (with quite alot of force, btw) and it popped off eventually.
Eric’s video on the subject: go to about 0:26
Ok well how would I know if it’s over adjusted? like should i completely loosen the nut? I’ve tried hammering and i’ve tried the threading thing but all it does is pull the shoes out with the rotor. That’s how I broke the pin that holds it to the backing plate since it wouldn’t let go. I’ll spray it with penetrating oil first thing in the morning and once i get back i’ll hammer away on the hat of the rotor.
Do you know if there is a ridge along the inside of the hat that’s causing the brake shoe to hang onto the rotor? Just an idea: Reinstall the two “push-off” bolts so there is some force against the hub, and then strike the backside of the rotor with a hammer until the shoe climbs the ridge. Rinse and repeat as necessary.
[quote=”Hanneman” post=163839]Do you know if there is a ridge along the inside of the hat that’s causing the brake shoe to hang onto the rotor? Just an idea: Reinstall the two “push-off” bolts so there is some force against the hub, and then strike the backside of the rotor with a hammer until the shoe climbs the ridge. Rinse and repeat as necessary.[/quote]
That’s really all you can do. Before you get too far, source the E-brake hardware. Especially if something has already broken. The hardware is fairly cheap, look up: RAYBESTOS H17393 . It’s usually just the retainers on the pins that break, so by all means just keep going. If you absolutely have to, you can remove the e-brake mechanism and pull out the cable and drive with no parking brake. UNTIL YOU GET THE PROPER PARTS. You’re probably also going to want to make sure the backing plate is where it should be. Application of a hammer should persuade it back into it’s original position.
My guess is that there is a ridge mainly because I had never removed the rear rotors before (but now every time I service the rear brakes I’ll remember this and I’ll take it off and clean it up). My plan for today is to spray it with penetrating oil now and let it soak for a few hours while I go look for parts. So should I NOT hammer it from the back to knock it off? I already have new rotors to replace as well as pads. I’ll try hammering it on the hat to see if its just stuck on and hopefully it breaks free but if it’s stuck on the ridge I guess the only way is to hammer it off from the back. The only problem with that is when I used the threaded holes to push it off I basically had the bolt fully threaded in and it kept pulling the parking brakes off with it so my fear is if I hammer it from the back while pushing it off it might pull off everything (since there is no longer a retainer pin). I don’t see a way to disconnect the cable from the backing plate though, it looks like it’s ran all the way through. Thank you guys so much for the help, I’ll keep you guys posted on what happens.
But now I’m confused, if this mechanism is only used for parking (not during braking) how can it build up a rim? I can understand drum brakes because that mechanism is used while braking, but for something that’s only used while stationary I don’t believe there can be a rim. Would that be correct? So then my guess now is that (hopefully!) It’s just stuck on and some love taps will set it free
It’s usually just some rust built up. It doesn’t take much to interfere with the shoes. Then if anything is really close, as soon as it twists in any way it will grab the shoes and take them with it.
Now that the retention mechanism is very likely broken and has to be replaced, there really isn’t anything holding the shoes on besides the cable. Unless you try to rip it clean off you shouldn’t really damage anything more. The shoes and mechanism will move until they reach the back of the hub and that will separate them from the “hat”.
I’ve sprayed it with penetrating oil and I let it sit for 3 hours. I then used the bolts to push it off and tried hammering the hat but nothing is changing. I can see that it’s caught on a lip so is hammering it off from the back (where the caliper cut out from the backing plate) is?
[quote=”Phoenix-9-7″ post=163869]I can see that it’s caught on a lip so is hammering it off from the back (where the caliper cut out from the backing plate) is?[/quote]
That was my thought, but I hadn’t accounted for the dust shield. It might help to rotate the rotor (if possible) as the shoe climbs the ridge to prevent the rotor from angling from the hub and consequently hanging onto the studs. Alternatively, it might help to align the “push-off” bolts with the cutout for the dust shield. As the shoe climbs the ridge, tighten the “push-off” bolt on the opposite side (furthest from the dust shield cutout) to apply an even/balanced force and prevent the rotor from getting caught on the studs.
Also, you might want to loosely install one-or-more lug nuts to prevent the rotor from falling when it finally breaks free.
Ok well here’s where I got today, thank you guys so much for the help! I got it off, got myself a BFH and hammered it off, turns out I didn’t break the pins I just bent one (thank God it can be slid out without having to remove the whole assembly). The parking brake shoes were so stuck that I actually took a chunk off of one of the shoes. I figured it’s not a big deal since it’s only parking brake but I’ll see how it works. I’ll order new pins tomorrow and I’ll replace it. But everything so far looks good
[quote=”Phoenix-9-7″ post=163891]Ok well here’s where I got today, thank you guys so much for the help! I got it off, got myself a BFH and hammered it off, turns out I didn’t break the pins I just bent one (thank God it can be slid out without having to remove the whole assembly). The parking brake shoes were so stuck that I actually took a chunk off of one of the shoes. I figured it’s not a big deal since it’s only parking brake but I’ll see how it works. I’ll order new pins tomorrow and I’ll replace it. But everything so far looks good[/quote]
Nice to hear! BFH are a man’s best friend. … Or tool 😛
lol they definitely come in handy :p, anyways I have developed another problem.. The parking brake won’t hold! I adjusted the wheel out as far as it will go (to the point where i couldn’t spin the wheels freely) then backed it off a smidge. Now the pedal does have resistance (it honestly feels about the same before this endeavor) but now it just doesn’t hold even on the slightest incline. I have checked to make sure everything is connected and everything checks out. I doubt it could be from that chunk missing from the shoe, but I don’t see anything else wrong.
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