Salsibury rear disc brake conversion merged threadfest - Page 5 - Defender Source
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  #81  
Old April 4th, 2011, 01:52 PM
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Jim Cheney
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Bear in mind that the hubs you will end up using will probably require the earlier standard size drive flange bolts as opposed to the newer metric ones. I forget the size, but maybe Keith or someone can weigh in.

That reminds me, I need a set of 10 of those early non-metric drive flange bolts! Anyone?
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  #82  
Old April 4th, 2011, 01:59 PM
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John are you referring to the ring that mounts in the area of the hub oil seal, or the large shield that is supposed to protect the brake disc?

Quote:
Originally Posted by Red90 View Post
I personally would not install the mud shields. They are really just mud and rock traps casuing accelerated wear.
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  #83  
Old April 4th, 2011, 02:01 PM
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Andrew Najarian
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Thanks Jim, I did see your post about that earlier in this thread. Those are the correct hubs though, right? Other than that all I should need are the various bolts, seals and bearings, correct? Obviously I will need pads and rotors, but that is just standard Disco I stuff, correct?

Thanks for all your help guys!
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  #84  
Old April 4th, 2011, 06:52 PM
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Quote:
Originally Posted by Ren Ching View Post
John are you referring to the ring that mounts in the area of the hub oil seal, or the large shield that is supposed to protect the brake disc?
The large shield as that seems to be what the original question is referring to, FTC3320/1 on stock 110 rear discs.
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  #85  
Old April 8th, 2011, 12:01 AM
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So it looks like the hubs I got (and I asked for RRC pre-ABS hubs are the thinner ones... and from two different sources as well) which means the stubs are now too long. The stubs have a flat side on them vs the notch as on the front ones. I'm not sure if it's just me but the inner bearing/seal seems pretty close to the axle tube as well, as if it needs a shim there...

What are my options at this point short of coming up with some kind of spacer arrangement? I have a 92 RRC parts truck (abs) sitting outside and some 90 parts that came off a 92 as well...

------ Follow up post added April 8th, 2011 01:12 AM ------

Well, a bit of experimenting and I've managed to answer my own question. I machine down one of the bearing races to make up the difference in width then press in the outer race there is enough to make up the bearing spacing of the non-thin type hub.
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  #86  
Old April 8th, 2011, 10:10 AM
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Other than the fact that bearing races are apparently too hard to machine (at least where I'm getting things done at the moment) there does appear to be room for a spacer, the drive flange will be close and needed I'll replace them with HD ones and make the space needed, not more than a few mm.)
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  #87  
Old December 10th, 2011, 07:13 AM
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Okay, here we go again. I am embarking on the rear disc conversion now. There has been a little back and forth between Keith and I on the proper parts for my truck. The confusion lies in what hub should go with what stub/spindle. To clear this up, Keith tells me:

"There are three types of factory stubs on Salisbury rear ends.

Really early type 83-85ish work with pre 1993 front hubs only for disc brakes. You have these stubs, I have these hubs.

Early type 86-93ish these work with RRC hubs front or rear (long non abs pattern usually pre 1991) you have these hubs but not the stubs.

Late model 1994 to current. These use Disco 1 hubs. If you have these you already have disc brakes."

Thus for me to keep my stubs, I need early 90 front disc hubs. If I want to use RRC hubs, I need to source Salisbury rear stubs from 1986-1993.
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  #88  
Old December 10th, 2011, 11:31 AM
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On my conversion i kept the original "drum" type stubs, and used early 90/110 front hubs. The rear disc bolts straight onto the front hub (same PCD for the bolts)

The only "problem", if one can call it that, was that the lock tab with the flat inside won't fit on, you need to use the tab with the little tongue in it. but this hasn't come loose in over 3 years use.
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  #89  
Old December 10th, 2011, 01:33 PM
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Quote:
Originally Posted by diesel_jim
On my conversion i kept the original "drum" type stubs, and used early 90/110 front hubs. The rear disc bolts straight onto the front hub (same PCD for the bolts)

The only "problem", if one can call it that, was that the lock tab with the flat inside won't fit on, you need to use the tab with the little tongue in it. but this hasn't come loose in over 3 years use.
Yep, that's the first option mentioned above.
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  #90  
Old December 29th, 2011, 06:22 PM
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Got the disc brakes installed today! Special thanks to Keith from RovingTracks for helping me figure this out.

After reading this thread, the compiling of parts and installation was pretty straight forward. I kept my stock stub axles and used early 90 front disc brake hubs instead of using RRC hubs and new FTC1740 stub axles.

I also chose to grind and finish sand the caliper brackets vice milling them. If you are competent with a grinder, this is definitely an option.

I ran in to the same issues as everyone else:

The stock stub axle mounting bolts won't work, their shank is too long.

My other issue was that I had the wrong caliper mounting bolts - mine are the M12x1.5 (I think).

If it's not obvious, keep the drum backing plate attached so you don't lose fluid.

Other than the above, this was ridiculously easy to do.


Still haven't had a chance to test drive it yet, but the pedal feels tighter.
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  #91  
Old December 29th, 2011, 09:25 PM
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Looking forward to see this and the new shocks at HH next month.
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  #92  
Old March 4th, 2012, 12:39 PM
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I'm mid-way through my disc brake conversion using Early RR hubs and FRC8540 stubs. When assembled there is about a quarter inch of slack between the outer bearing and the heavy washer. Should there be a different spacer (FRC8227?) or thicker washer? This is what I have now:

Inner seal
Inner bearing
Hub
Outer bearing
Heavy washer (~1/8" thick)
Hub nut
Lock washer
Lock nut
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  #93  
Old March 4th, 2012, 01:45 PM
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Paul,

I'll send you the pieces you need, I found a couple of old ones that will work fine, you just need to post pics of the for the board. In the mail tomorrow.
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  #94  
Old March 4th, 2012, 01:58 PM
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Sweet. Will do, thanks Keith.
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  #95  
Old June 4th, 2012, 07:58 AM
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Is there any scenario in which one does NOT need to machine the caliper brackets?
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  #96  
Old June 4th, 2012, 08:01 AM
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Yes, you'll be able to purchase a kit for $549 from Roamoffroad any time now.
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  #97  
Old June 4th, 2012, 09:34 AM
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OK Thanks for the sales pitch, but I already have pretty much all the parts I will need. I guess what I am asking is whether there is a parts list that shows a hub that is the ideal thing to give the disc the correct alignment with the caliper.
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  #98  
Old June 4th, 2012, 09:47 AM
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If you purchased Salisbury Disc components then yes, if like the rest of us you bought Discovery brackets, then they need to be machined.

Personally I converted all my hubs to the thin type when I put a 24-spline front diff in. To do this I also machined the rear axle stubs to match the fronts.
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  #99  
Old June 4th, 2012, 10:39 AM
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Bill, It's real easy to "machine" the brackets yourself, or Keith from RoverTracks can mill them for you. I've also pitched to Lucky8 for them to sell pre-machined brackets too.
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  #100  
Old November 7th, 2012, 01:01 PM
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OK I'm more messed up than ever it seems. I was looking at the rear axle again on Monday and it seems all wrong. The hubs I have fit on the (drum) stub axles OK, except that the stub seems to stick out past the hub an awful lot so that I can't get a drive flange on it. The other thing is that the brake disc is so far inboard that I have washers spacing away the 3306 bracket from the axle flange by about 5mm. And the bracket doesn't line up with the holes in the flange too well, the bolts are really getting distorted when I run them in. I don't have a caliper that seems to fit. I am pretty much at square one with this and I have no clue what to do next. I can find a whole bunch of part numbers for the Salisbury disc parts on numcat, but none of them appear in any vendor's websites, or the ones that do are for one side and the other side is unavailable. Makes ordering them very difficult.
So I am gathering that Disco stubs and hubs are what I want, but I don't know which part numbers to look for. There seem to be at least three types for Disco. If anyone can offer some help I'm all for it. Ready to junk what I have and start all over. What I have that is absolutely known: 3306 brackets x 2 unmilled, OE Salisbury drum stub axles. The other stuff I have no idea what it is, what year, what vehicle it came from or anything.
This thread makes it seem like it's so easy to do this, but I am having no end of bother. And I have yet to find the right axle shafts.
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