Thread: Disc Brakes

Definitely no expert............. just a couple of observations.

The Allen bolts appear to be countersunk (?), Allen bolts are all generally hi-tensile (?).

Would it be possible that the combination of this, with the bolts torqued up, has caused the splits, rather than the disc material?

Remember that even a mild angle in any countersinking will act as a wedge as the disc (cast) heats up and expands against the tension of the bolts.

Remarkable that all the splits are around the bolts.

cheers, DL

Originally Posted by 101 Ron

There is no rotor that will replace the Zeus one.
New ones will have to be purchased from Zeus or made from stratch to spec.
I have been too busy to chase this.
I have somemore pics.

I would still research other makes of rotor. Take a look at the wilwood rotor catalogue, they have a variety of flat rotors. Wilwood High-Performance Disc Brakes - Rotors

The latest news on my disc brakes is.
Zeus is giving me a good deal on replacement discs and appear to be looking after me.
I also so have another disc brake kit coming too which I intend to fit to the rear of my 101 Land rover.
The exchange rates currently is still viable compared to doing anything locally.............read of the price in English pounds and just slightly more than double it you will get the price in Aussie dollars.

The biggest problem has been communication as Zeus has been swapping over to optic fibre and E mails have not been working well.
Direct calling late at night has been working better...(11 hour time difference)
Just got to sit back and wait for the goodies to arrive.
Zeus is going to shortly bring out a new version of the 101 disc brake set up.

The impression I get of the new 101 disc brake kit when released will be.
One piece disc rotor and hub adaptor instead of the bolt on disc rotor to the adaptor of the current set up.
That will reduce machining costs,stop any possible cracking of the disc like I have and reduce any possible disc rotor run out.
Doing things in one piece could save weight too.
As stated above I do not have any details of the new 101 disc set up coming, just impressions they gave me over the phone.
Ron

As a side note I keep a mainance log for my 101.
I have travelled just under 10,000 kms since fitting the disc kit.
( my 101 has a non standard kilometre speedo fitted)
I am still on the supplied disc pads and the discs themselves show no wear as the preivous pics show.
I am starting to think it could be a one off problem with the cracks.
Ron

Good to hear Ron. Did they speculate as to why you had cracks on your discs? Also be interesting to see how they facilitate a disc change on the new system if the hub adaptor and disc are one piece. It wouldnt be easy to separate the adaptor from hub of its anything like the current design.

This weekend I have been swapping over the front discs on my 101 Landrover after receiving all the bits from Zeus.
What did surprise me was when the spare discs arrived they came with the hub adaptor ring which are very heavy and increases freight greatly.
The only reason I could think of for this is they are machined as a unit to help keep things true and avoid any run out of the disc.
After stripping down the front brakes of my 101 and having the front hubs ect sitting on the bench of my garage, I realised it was better not to disturb the six special wheel studs that hold every thing together, as I don't have spares and if you check out the first few pages of this thread mine were well loctited in and I would damaged them getting them out.
This left the option of transferring the new discs from one hub adaptor ring to another.
That option turned out to be with problems too.
To remove the allen head bolts it took a socket head allen drive and a big 3/4 drive rattle gun to remove them.
The problem being they were so tight that a lot of the allen head bolts just sheared the allen drive in the head of the bolt.
A lot were drilled out and I did have spares as they were with the new hub and adaptors.
These bolts were way too tight and now I believe they were the cause of the original discs cracking.
Luckly I decided to go this way is I wouldn't have picked up the bolts being extremely tight on the new disc and adaptors.
All was assembled and tested and no problems found with run out after transferring the new discs to the old adaptors.
What was interesting is the old discs showed no wear and the original disc pads supplied by Zeus were refitted as they still had plenty of meat left on them.