Broken handbrake
Broken handbrake
Author
Discussion

Bigadz

Original Poster:

393 posts

172 months

Thursday 26th April 2012
quotequote all
Happy days, just before Chatsworth I managed to break the handbrake. Releasing the bloody thing it went and now it clicks up and down but without any tension or effect!

Someone please tell me it's an easy fix which will take 5 mins to resolve? Please.....

Tanguero

4,535 posts

225 months

Thursday 26th April 2012
quotequote all
Its an easy fix that will take 5 min to resolve... if you have the exhaust off, drilled out the rivets for the heat-shield and dismantled both rear hubs. Sorry!

It actually may not be too bad, or it might be a right bugger depending on what has let go. Check the handbrake cable into the top of the rear hubs first to check it isn't detached there.

Then move up to the adjuster plate in front of the diff at the top of the tunnel. You don't need to remove anything to get to that, just prehensile arms from underneath the car. Both halves of the cable go through the plate. One from the drivers side has a large nylon adjuster, on the passenger side the sheath from the other end of the cable sits in a slot in the plate.

If either are loose then you have found the problem. It may well be that the nylon adjuster has slipped. Mine had a tendency to do that and the lever goes completely slack when it happens. You can fix it temporarily by screwing the adjuster up then putting a suitably sized wire cable clamp round the shaft behind the nylon nut to stop it slipping back.

If the adjuster looks fine then you need to remove the bottom tray, the exhaust and the heat-shield and check the pin that holds the cable extension to the lever.



Bigadz

Original Poster:

393 posts

172 months

Thursday 26th April 2012
quotequote all
Thanks for that reply T, I will work through it and if it is the last thing on the list then it will have to wait until after Chatsworth. I shall just have to remember to leave the car in gear on slopes!

scotty_d

6,795 posts

218 months

Thursday 26th April 2012
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Hi mate not so good. It is in a few sections here is what it looks like.

It is a pig to get at with the prop shaft shield still in, but to get you by for the weekend a find where the break is and do a temp repair on it. if you slacken off both shoes it will give you a little more slack to play with and use something like a few big electrical choc blocks in a line to clamp the 2 snapped ends up if you can. This is only a guess mate as i don't know where the brake is.

http://www.clever-trevor.net/TVR/Parts_details/J01...

Edited by scotty_d on Thursday 26th April 22:04

Bigadz

Original Poster:

393 posts

172 months

Thursday 26th April 2012
quotequote all
Thanks Scotty, typical pain in the ass. Realistically I'm not going to get much done between now and leaving Sat morning. Still looking forward to it though, this is just annoying.

pmessling

2,313 posts

227 months

Thursday 26th April 2012
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You'll probably find that the nylon adjuster has slipped out of the chassis mounts happened to mine. Although easy fix it's getting to it. If its anything more major witht the cables I have brand new ones on eBay. You can just about see them with the rear wheels removed. You may be able to get a long arm in and get to them but would need the shoes winding right off for some slack.

ridds

8,366 posts

268 months

Thursday 26th April 2012
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Beware, cable clevis' need to be modified to fit the Cerbera lever brakets.

As I found out last weekend.... frown They are too wide to fit in the mechanism so have to be ground down.

Tanguero

4,535 posts

225 months

Thursday 26th April 2012
quotequote all
I don't know if this helps - but it shows the adjuster (and my temporary fix). You can reach this from underneath without dismantling anything. If you stick your arm straight up on the drivers side of the nose of the diff and feel around you should be able to reach it.


Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
Thanks T, I think I can make it out from that pic, so you reach up around the side of the diff by the looks of it? What did you use to clamp the ends back together?

Looks like a job for next week.

Tanguero

4,535 posts

225 months

Friday 27th April 2012
quotequote all
I stuck a wire rope clamp round the cable sheath behind the nylon adjuster to stop it sliding back. You can see the white nylon adjuster nut on the right hand cable where it goes into the support plate, just this side of it the silver thing is the clamp. I also had a problem with the left hand sheath bending the plate and slipping out of its slot so there is also a cable tie round it to hold it all together.

If that is where your problem is, I can take some pictures of how I fixed the adjuster. I still have the old cable kicking around.

Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
That would be a life saver if you could mate. I will investigate it next week, will it be quite obvious?

See you Chatsworth?


Tanguero

4,535 posts

225 months

Friday 27th April 2012
quotequote all
Bigadz said:
That would be a life saver if you could mate. I will investigate it next week, will it be quite obvious?

See you Chatsworth?
It should be reasonably obvious if that is the problem. If not it will be one of the other places mentioned.

Seeing as my chassis is only due back from the powder coaters tomorrow morning, I think Chatsworth might be a bit of a push! I will grab some pics of the offending adjuster over the weekend.

Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
Lol okay, well at least you are going to have a mint chassis, lifetime fix.

Thanks for your help, good to have some pics on here which will help everyone who has the issue in future.

Tanguero

4,535 posts

225 months

Friday 27th April 2012
quotequote all
I found this that shows it a bit more clearly. On the right the double nylon nuts of the adjuster and on the left the cable sheath in its slot.

anonymous-user

78 months

Friday 27th April 2012
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It'll be great to see the "after" pics of the chassis. Did the bill go overboard at all Peter?

Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
Yeah I can see a bit better there, just looks difficult to access up around the diff but I might be wrong as I have only been under there a few times so cant remember exactly.

pmessling

2,313 posts

227 months

Friday 27th April 2012
quotequote all
Here's some photos I took when I done mine. they are in order from hand brake lever to adjusters











The last photo shows the adjuster. I adjusted mine too tightly to get a working handbrake and the nylon adjuster slipped out. When the lever was pulled up. I reseated the adjuster and loosened the hand brake slightly and adjusted more at the shows not the cable.

Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
Great pics Peter, thanks for those. Where else would you get this kind of help other than a TVR forum smile

I think I understand now what may have happened. My handbrake was previously set very tight I would say, so I think when I went to release it rather than the cable snapping, its the adjuster which has most likely come up out of the slot.
So I possibly need to slack off at the shoes and then get the adjuster back with a clamp to secure in before tightening up, probably not quite as tight as before!

Tanguero

4,535 posts

225 months

Friday 27th April 2012
quotequote all
It will either be that side out of the slot - or the nylon adjuster slides back along the threaded part on the other side. Hence the clamp behind it to stop it slipping on the thread.

Bigadz

Original Poster:

393 posts

172 months

Friday 27th April 2012
quotequote all
Okay, seems like a bit of a vunerable point on the system tbh. Hence why you have re engineered it to stop it slipping in true TVR fashion.

Ive arranged to get it up on a ramp first thing in the morning. If it has done this do you think it would be easy to get it back into the slot or will I need to slacken off elsewhere?