Outer Limits 4x4 Board

I've been asked about part numbers for a brake caliper upgrade (46mm pistons instead of the stock 41.3mm ones).

All these brake numbers are from the Paddock Spares website, that's where I got my calipers from.
The ones with "ordered" are the ones I bought and fitted to my rangie. Fantastic upgrade that I recommend to all.
Needed modifications were only plumbing and some grinding to the mounting tabs.

They are front brakes only.
__________________________________________________________
Front Disc Calipers 90

pre 86 (41.3mm)
RH RTC3380
LH RTC3381

86 - HA701009 (41.3mm)
RH RTC4998
LH RTC4999

HA701010 to KA930455 (46mm)
RH RTC5572
LH RTC5573

LA930456 onwards (46mm)
Solid
LH STC1262
RH STC1263

LA930456 onwards (46mm)
Vented
RH STC1266 ordered
LH STC1267 ordered
___________________________________________________________
Front Disc Calipers 110/130

pre 86 Drum Rear
LH AEU2537
RH AEU2538

86-KA930455 Drum Rear
LH RTC5573
RH RTC5572

LA930456 onwards Disc all round
Solid
RH STC1263
LH STC1262

Vented
RH STC1266
LH STC1267

__________________________________________________________
Front Disc Calipers RRC

Solid
RH AEU1718
LH AEU1719

Vented - 11mm mounting hole to march 93
RH RTC6776
LH RTC6777

Vented - 12mm mounting hole after march 93
RH STC1283
LH STC1282
____________________________________________________________
Rotors

Solid - Fits all requiring solid discs
FRC7329

Vented - Fits all requiring vented discs
FTC902
___________________________________________________________
Front Caliper Piston
606683 (Fits All RRC, 90 to HA701009) 41.3mm
STC201 (Fits all 110/130 and 90 from HA701010) 46mm

Front Caliper Seal Kit
AEU1547 Fits 606683 41.3mm
AEU2539 Fits STC201 46mm

excellent.
I have added to the bible.

Michael.
thanks again.

Hi KiwiBacon,

Can't find the caliper part numbers you bought on Paddock, can you please provide a link or cost?

What year RR do you have?

Am going to get their braided lines + 2" and some other bits, but want to do it all in one go.

TIA, DL

http://www.paddockspares.com/sp/abspage ... rakes.html

MICHAEL.

Thanks Michael,

Cost is not much more than pistons and seals in Oz!

Need to know if they will fit a 72/81 RRC.

cheers, DL

DL wrote:Thanks Michael,

Cost is not much more than pistons and seals in Oz!

Need to know if they will fit a 72/81 RRC.

cheers, DL

My rangie is 85. I know they changed bolt sizes/thread somewhere along the line. But if you own a drill that's not a problem.

I had to grind the mounting ears on the calipers a little and I converted to vented front rotors at the same time.
I also put in a MC kit from paddock that has never worked properly. Looks like poor moulding of the rubber seals, the flash at the seams lets the pedal bypass part of the stroke (at random intervals).
I'm putting PBR seals back in.

*edit*
I paid 60 pounds for each caliper, brand new. Shipping wasn't too bad either.
*/edit*

Thanks KiwiBacon,

Couple of Q's-

Looking at a Defender w/shop manual on the web shows only one hose each side going to the hub.

Looks like the split braking circuit is done differently from RRC's.

What plumbing changes did you make?

My RR has the Lockheed master cylinder with the seperate proportioning valve and I want to keep the primary and secondary circuits.

Also noticed that all the vented discs are the same, but pads are different from RRC.

cheers, DL

you loose the dual circut to the front .

Michael.

Thanks Michael,

Doesn't sound roadworthy or desirable.

cheers, DL

nothing un roadworthy about it.

same as used on defender and later model discos ect.


Michael.

DL wrote:Thanks KiwiBacon,

Couple of Q's-

Looking at a Defender w/shop manual on the web shows only one hose each side going to the hub.

Looks like the split braking circuit is done differently from RRC's.

What plumbing changes did you make?

My RR has the Lockheed master cylinder with the seperate proportioning valve and I want to keep the primary and secondary circuits.

Also noticed that all the vented discs are the same, but pads are different from RRC.

cheers, DL

Yes these brakes are single line, which I believe is a safer setup than dual circuit.
With the dual circuit setup, if you lose one corner (say rotor cracks, takes out the pistons in a front caliper) then you've lost both circuits.
With a single line to each corner, a major problem on one corner can only take out one brake circuit, the other will still work.
This is why almost no other vehicles use the twin hose setup.

The circuit closest to the firewall on your MC is plumbed to the front brakes, the circuit furtherest from the firewall gets plumbed through the proportioning valve to the rear brakes. You need to block off the extra port in the proportioning valve.

Pads are matched to calipers. You need to buy pads (and retention kit) which fit the new big front calipers.

Thanks KB!

I looked at the Def and RRC arrangements and couldn't figure out how you'd done it. Save on hoses as well.

cheers, DL

Quick question for the original post. Are pads for these calipers widly available in aus. Not just standard pads but the high performance ones. Looking at Paddock Spares adn the orderd calipers are the def 90 caliper or does this only effect mounting and not the pad type. Plenty of talk about on which pads to use but would suck to have to bring them in from the UK each time.

Hi Guys,

I am really interested in converting my front brakes before i remake all my lines, could someone clarify the best way to do this? Getting rid of the dual circuit really appeals to me.

For example will a set of SI/II Disco calipers and rotors fit the Classic front housing, if late model stuff bolts straight on it would make servicing and spares easy in the future.

PS i don't know what brakes the discos run Are they single circuit? In regards to rotors, i an in two minds about vented/solid, any feedback would be appreciated.

Cheers

Steve

schuler wrote:Hi Guys,

I am really interested in converting my front brakes before i remake all my lines, could someone clarify the best way to do this? Getting rid of the dual circuit really appeals to me.

For example will a set of SI/II Disco calipers and rotors fit the Classic front housing, if late model stuff bolts straight on it would make servicing and spares easy in the future.

PS i don't know what brakes the discos run Are they single circuit? In regards to rotors, i an in two minds about vented/solid, any feedback would be appreciated.

Cheers

Steve

Brakes are all interchangable between disco and classic rangies. Some discos are double line, some single but that's it.

I didn't have to remake any lines, I just made a plug for the spare port in the rear line pressure reducing valve, the rest fit with minor rebending in some places.

There was no reason for me to stick with solid rotors.

It's still kinda dual circuit with this mod. The primary works the fronts and the secondary works the rears through the proportioning valve.

That's how the Defender system appears to work according to the manual, with the warning light switch as part of the valve rather than part of the MC.

Thanks for checking the clearance dimensions KB. I have 365 mm ID rims so it's going to be close. There are a couple of 130's in town so I better have a really good look at them.

I intend using slotted solid DBA's in any case, cause I already have a new set lying around. Calipers will be STC 1262 & 3 if I get Def's.

cheers, DL