M739 V-brakes and Ceramic Rims

[Radar]

You don't need the rebuild kit, certainly not at that price.

You will need some Hope stainless shim washers, pack of baby wipes, some threadlock a sharp knife and some Bostick glue.

Rebuild pack is basically washers, stickers and new grub screw. I did have some but sent them to someone on here (karma - a thankyou they arrived would have been nice) so can't mesasure the shim washers for you sorry.

Basically use sharp knife to peel back sticker blanks off (clean old glue off with babywipes - use Bostick to stick them back on). Grub screw comes out, think you have to push arm axles out with an allen key. Clean everything up, reassemble with a shim on each side of the arm (only tricky bit involved), grub screw back in (remember to threadlock it), and put the stickers back on.

Think that is right - it was a while ago I did this, but I'm sure you can find the repair kit pdf online to explain it much betterer than wot I did. Difficulty scale 1/5, finding the pdf might be the hardest bit.


(XT on ceramics were always noisier than XTR to be honest, Shimano ceramic pads were the best, and toeing in was really important too - the Tacx brake setting tool does this perfectly)

 

[richmog08]

Thanks for the advice, i've had a go at dismantling one and it's pretty easy. I just need to get some spacers now. I've got some 0.3mm ones that i may try, but everyone seems to recommend 0.2mm. Oh well, i'll give it a go and see.

 

[ishaw]

Seems simple enough. The kits I saw on eBay included the entire linkage, not just the washers and stickers.

I've got a kit or two already so if you need the instructions, happy to scan it though it may already be in the archive.

 

[FluffyChicken]

You don't need the rebuild kit, certainly not at that price.

You will need some Hope stainless shim washers, pack of baby wipes, some threadlock a sharp knife and some Bostick glue.

Rebuild pack is basically washers, stickers and new grub screw. I did have some but sent them to someone on here (karma - a thankyou they arrived would have been nice) so can't mesasure the shim washers for you sorry.

Basically use sharp knife to peel back sticker blanks off (clean old glue off with babywipes - use Bostick to stick them back on). Grub screw comes out, think you have to push arm axles out with an allen key. Clean everything up, reassemble with a shim on each side of the arm (only tricky bit involved), grub screw back in (remember to threadlock it), and put the stickers back on.

Think that is right - it was a while ago I did this, but I'm sure you can find the repair kit pdf online to explain it much betterer than wot I did. Difficulty scale 1/5, finding the pdf might be the hardest bit.


(XT on ceramics were always noisier than XTR to be honest, Shimano ceramic pads were the best, and toeing in was really important too - the Tacx brake setting tool does this perfectly)

It was me you sent them too*, almost certain I sent a thankyou, I normally do. But if not , I have in fact just been using some of them again in M950 brakes. Taken me a while to get around to fixing them.

A belated Thankyou and much appreciated is certainly needed then.
The M950 instructions are scanned up and in the archive and have the thicknesses, basically 0.05, 0.1, 0.2 and 0.3mm shims and I measured and checked. I found 0.05 and 0.2 are the ones I used, mainly 0.2mm. 0.3mm wouldn't fit in.
But get yourself a selection.

Be careful with the linkage packages and get the right ones, there are the M739 and the M950, they do not fit one another.

(I have the full dimensions ID and OD written down as well somewhere if really needed)


*at least I think it was.

 

[Radar]

Fluffy - apology accepted, no worries

 

[sinky]

Cable ties and / or these

http://www.chainreactioncycles.com/Mode ... odelID=356