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Brake calipers and axles...


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I have a "older" style narrow radius arm front axel, and I want to get a new set of calipers. there are heaps on fleebay.

Now a question; are all front calipers interchangable with the verious models of disc front axels? i.e. can i put some TD5 vented calipers on a 1984yr front disc axel?

I know you have to match vented type to vented discs, but is there a difference in the foundation points?

And is there a difference between 90 calipers and 110 calipers??

Cheers

Mav

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you also get two different types of threads on the bolts, 12mm and something imperial but i cannot quite remember what it is... yours assuming it is original should be the imperial size

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The bolt sizes are 12mm or 7/16 UNF. The bolt spacings are the same though.

If you want to fit calipers with 12mm bolts on a 7/16 UNF hub then you'll need to have some special bolts made.

There are a variety of different piston sizes depending on year and if it's 90 or 110.

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Ok, so if I wanted to fit vented discs to my 1984 90 with an original unvented disc axle, which calipers would I need assuming, as I am, that the hubs would be imperial ? Perhaps they'd be metric by 1984 ? :unsure:

Lets use Paddocks front brake page as a common reference point for simplicitys sake :rolleyes:

Mo

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The bolt sizes are 12mm or 7/16 UNF. The bolt spacings are the same though.

If you want to fit calipers with 12mm bolts on a 7/16 UNF hub then you'll need to have some special bolts made.

There are a variety of different piston sizes depending on year and if it's 90 or 110.

Could you clarify something. why if the bolt pattern is the same cound I not just fit a new caliper (metric later one) using the original UNF bolts?

cheers

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Mo,

The case and hubs are Range Rover 3.9, 1990 with abs. The swivels are Disco (taper bearings top and bottom). The stub axles, wheel hubs and cv's are from a 1984 90.

My hubs have the 7/16 UNF caliper bolts so I have made stepped bolts to suit the 12mm caliper holes.

You could use the RR calipers of course but they have 2 inlet pipes. The pistons and pads are also smaller than the 110/130 calipers.

Paul.

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