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Author Topic: Rear brake flange (back, carrier) plate bolts  (Read 659 times)

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Enceladus

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Rear brake flange (back, carrier) plate bolts
« on: 18 March 2019, 16:20:47 »

What size is the splined socket key required for the bolts that secure the carrier flange? Or is a splined Allen key better?
What torque are they done up to?

The pivot pins for the parking brake shoe thrust springs are inserted from the back on later cars, secured on the front side with a cupped washer. On older cars it was necessary to (temporarily) loosen the carrier plate bolts and move the carrier plate outwards to retrofit new type pins. The older pins were inserted from the front into slots in the flange carrier plate. However is it still necessary to move the newer carrier plates simply to fit replacement pins?
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Re: Rear brake flange (back, carrier) plate bolts
« Reply #1 on: 18 March 2019, 16:39:51 »

T27 or T30 from memory.
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Enceladus

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #2 on: 18 March 2019, 17:21:23 »

I'm not able to check on the car at the moment, but I'm not sure that it's a TX at all. I seem to recall it's a 12 spline flange or maybe a 12 point XZN. Also that I had a socket for it that was not part of a set and not that handy to get. Of course it's disappeared, at least I can't find it.
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Jan Suhr

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #3 on: 19 March 2019, 14:37:50 »

If I remember correctly they are the same kind as old Opel 1900 engines cylinder head bolts. I have those from my younger days when I had those 1970's Opel's.

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #4 on: 19 March 2019, 21:03:36 »

The heads are also very shallow and they tend to strip the splines

Andy
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Andy H

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #5 on: 19 March 2019, 21:31:50 »

Also - with the stub axle in place you need a triple square / XZN bit long enough to reach through the hole in the drive flange before it can engage in the bolt head.

I have a set of XZN bits but they aren't long enough ....
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Re: Rear brake flange (back, carrier) plate bolts
« Reply #6 on: 20 March 2019, 11:45:10 »

Yup, triple square, did one myself a few months back, had to buy it specific for the job.

As has been said, I stripped one of the heads, (200k car) and that was with penetrating fluid, time, tapping the tool in place, shock, everything textbook, just chewed right through it.

Mine's labelled as a M10. Loong version I got from the King Dick website, though arrived and actually by an American company called 'Powerbuilt' which are meant to be pretty decent, certainly no complaints, looks as well finished as some Halfords Pro, Stahlwille, Gedore, etc stuff I have.
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Re: Rear brake flange (back, carrier) plate bolts
« Reply #7 on: 20 March 2019, 19:46:00 »

The heads are also very shallow and they tend to strip the splines

Andy


Word from the wise, clean the head before pushing the bit in.
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Re: Rear brake flange (back, carrier) plate bolts
« Reply #8 on: 21 March 2019, 15:12:47 »

If I remember correctly they are the same kind as old Opel 1900 engines cylinder head bolts. I have those from my younger days when I had those 1970's Opel's.
Yes, long XZN needed, and for water pump bolts as well, those oil leaking engines, had one Rekord C model 1900 from 1969.
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Enceladus

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #9 on: 27 March 2019, 17:56:48 »

Mine's labelled as a M10. Loong version I got from the King Dick website, though arrived and actually by an American company called 'Powerbuilt' which are meant to be pretty decent, certainly no complaints, looks as well finished as some Halfords Pro, Stahlwille, Gedore, etc stuff I have.
I can't seem to find the Powerbuilt bit you bought.
How long is the shank on the bit, or the total length including the socket?
Long seems to very from about 65mm to 100mm total depending on brand. And extra long from 70mm to 140mm total.

Also what is the max diameter of the shank?
I ask because I note that some of the longer available triple square bits have the splines formed on a larger diameter hex. So I don't want to buy one that won't fit through the hole.

The XZN bolts themselves are tightened to 50Nm + 30°.
Thanks,
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Andy H

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #10 on: 27 March 2019, 23:29:12 »

It needs to go through the hole that you use when adjusting the parking brake.

I think you are going to have take a rear wheel off and check for yourself - sorry I can't be more helpful
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Re: Rear brake flange (back, carrier) plate bolts
« Reply #11 on: 06 April 2019, 15:46:31 »

Mine's labelled as a M10. Loong version I got from the King Dick website, though arrived and actually by an American company called 'Powerbuilt' which are meant to be pretty decent, certainly no complaints, looks as well finished as some Halfords Pro, Stahlwille, Gedore, etc stuff I have.
I can't seem to find the Powerbuilt bit you bought.
How long is the shank on the bit, or the total length including the socket?
Long seems to very from about 65mm to 100mm total depending on brand. And extra long from 70mm to 140mm total.

Also what is the max diameter of the shank?
I ask because I note that some of the longer available triple square bits have the splines formed on a larger diameter hex. So I don't want to buy one that won't fit through the hole.

The XZN bolts themselves are tightened to 50Nm + 30°.
Thanks,

apologies, just seen this reply. I'll try dig out the invoice, and find it on the website, as i say, its sold as a King Dick, but arrived branded 'Powerbuilt', just in case you were looking for 'powerbuilt'. I'll have a dig.  :y PS 100mm or so rings a bell.
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Diamond Black Geezer

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Re: Rear brake flange (back, carrier) plate bolts
« Reply #12 on: 07 April 2019, 16:56:10 »

Measured the tool in question it is 100mm, one side note is that after I'd tapped the splined bit into a few of the bolts to ensure good purchase when undoing 20+ yr old botls, when I came to do the other flange plate the bearing/plate for the hub appeared to be further out form the flange/backing plate than the other wishbone! How could this be... it wasnt that at all, but the tool was shorter! After some head scratching I realised that the plined chaft actually had gone inside the chromed socked which held it, thanks to my tapping. a quick knock with a punch and normal service was resumed.  :y
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