21 replies to this topic

[lx308]

Howdy.
Can someone please confirm if this would be correct to use on our 2/73 Brissy built XU1?
If not, please point me in the right direction

Cheers.

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[jd lj]

It looks like the one you need, just check that it has "DISC" stamped on the nut at the front. I'd get it reconditioned before using it too.

[lx308]

Nope. No disc stamped on big nut. I should've realised that before.

The master that was on the car is the later replacement cylinder without the nut. There was nothing wrong with it, so maybe throw a kit through it & use it again.

How hard are the correct ones to find?

[S pack]

Just because it doesn't have 'disc' stamped on the face of the nut doesn't mean it isn't suitable to use.

 

Does the nut have anything stamped on it and what is the cast date of the cylinder?

[lx308]

Nut has nothing on it Dave. Here's all the stampings I could find on it.
Nothing looks like date stamp to me?

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[S pack]

Seeing as the nut currently has nothing stamped in it you could have the appropriate info stamped to suit your car.

At the end of the day I reckon an incorrect dated or in this case undated big nut m/cyl would still look better than an aftermarket alloy job on your XU1.

[wot179]

Can you buy a rebuild kit for a big nut that includes all the internals, not just a rubber kit?

[lx308]

How do I know if it's correct for disc brakes?
It has a 1" bore.

Can you buy a rebuild kit for a big nut that includes all the internals, not just a rubber kit?

Not sure Craig. I've seen some on evil bay a while ago.

[wot179]

I ask because I have this one, but the piston is damaged.

http://www.gmh-toran...aster-cylinder/

 

Yes, I damaged it disassembling it, and I forgot to remove the little screw inside the resovoir.

[sibhs]

Can you buy a rebuild kit for a big nut that includes all the internals, not just a rubber kit?

Hi Craig, yes, I bought a set, very expensive just for seals, pistons and rubber top. $200
Which is about what people spend when they get them recond with a sleeve. Go figure?
Marty

[Bazza]

Hi

 

It is hard to stumble across the correct one. I have been trying to get a DISC August or September (H or J) 1972 for about 8 years.

 

Anyone??

Cheers

 

Bazza

[Bazza]

Hi Bazza

 

Are you after just the nut??

 

I have 4 or 5 here and think I may have a 72 but don't know what month it is.

 

I'll have a look over the weekend.

 

cheers Dane

 

Hi Dane

 

Yep - just the nut is fine. I would buy the whole thing if I have to but I have already had the master resleeved and fitted with new seals. An  xH2 or a xJ2 or an early xK2. Ideally an xJ2 would be the go.

 

Cheers

 

Bazza

[S pack]

How do I know if it's correct for disc brakes?
It has a 1" bore.
 

If it is off a drum/drum brake car it will have a residual line pressure check valve under the brass brake pipe seat in both the front and rear ports.

These are located under the red plastic plugs shown in your pic.

 

Conversion of your m/cyl from drum/drum to disc/drum is as easy as removal of the residual line pressure check valve from the front brake pipe port.

New brass seats are supplied in the rebuild kits.

[lx308]

Cool. Thanks Dave.

[dattoman]

Looks like everyones had a shot at that cylinder

Has both Perth Brake Parts and Repco Reman's markings on it

 

As Marty said kits are avail with pistons if req

The same guy sells just the big nuts with no stampings if you ever need one and just stamp your own info in it

 

Its the right casting shape for your car too which is a bonus

All those style of cyl are 1" standard

[lx308]

I was gonna buy Craig's cylinder & make one out of 2, but I'm thinking I won't have to by the sounds of it. Just get this one sorted.
What do you reckon Datto?

[S pack]

but I'm thinking I won't have to by the sounds of it. Just get this one sorted.
 

Spot on Tony.

[dattoman]

Its already got a stainless sleeve in it

May as well use it

 

 

As a sidebar I've been approached to reproduce the big nut master cylinder casting

Not sure if theres a need though

[Dr Terry]

Its already got a stainless sleeve in it

May as well use it

 

 

As a sidebar I've been approached to reproduce the big nut master cylinder casting

Not sure if theres a need though

There is more demand for the HK/T/G style master cyl. There still seems to be plenty of HQ/J ones around.

 

Dr Terry