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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 07-04-2009, 10:14 PM   #1 (permalink)
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T140 Rear Master Cylinder

Where would I find a rear master cylinder for my 76 Bonneville?

I had replaced the original after about 25 years with one of those fancy stainless body replacements thinking "it's got to far outlast the original". Ha! Not even close.

So it's back to the good old stuff if I can find it.

Maybe I should look into having the original redone.

The p.i.a. is that Triumph didn't do us any favors when it comes to swapping them out. The bike has to be hung from the rafters and the rear wheel removed, not to mention wrestling with that brake return spring.
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Old 07-04-2009, 10:41 PM   #2 (permalink)
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they are rebuildable i did both mine a while back with tricor rebuild kits, clasiccyclespares.com all that stuff now, alternatively northern eagle cycle or british cycle supply will have, they used to fit those on all the Triumph tr car range, so even any car spares place ap loockheed part#4211-127 triumph# 60-4401
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Old 07-04-2009, 11:42 PM   #3 (permalink)
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Originally Posted by whatsthat View Post
they are rebuildable i did both mine a while back with tricor rebuild kits, clasiccyclespares.com all that stuff now, alternatively northern eagle cycle or british cycle supply will have, they used to fit those on all the Triumph tr car range, so even any car spares place ap loockheed part#4211-127 triumph# 60-4401
I'll have to look inside to see if the original barrels are pitted. I imagine at this age they may be.

The stainless came from British Cycle Supply, so I'm not going that route again.
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Old 07-05-2009, 10:03 AM   #4 (permalink)
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the best tool I've found for resetting the spring is a tent peg puller.

It's made of steel rod, shaped to form a handle, with ashort shaft, then bent to form a hook.

Beats a bit of string.

I also have a bike jack - less than 100 here. Very handy - if a bit heavy
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Old 07-05-2009, 03:37 PM   #5 (permalink)
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yup if there pitted they are toast make sure you take a look at a shop manual before you pull them apart, re assembly is a bit of a black art as far as the port adjusting is concerned, like Dave said a good bike jack is a good investment, I have a snowmobile jack from princess auto bout $100. You can pull all the back end out and still roll it round the shop on the jack.

Hi to Dave I am an ex pat from Basingstoke road living in Canada, have a pint in the jolly anglers for me.
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Old 07-05-2009, 05:08 PM   #6 (permalink)
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I have an automotive floor jack that I boost the Thunderbird up with.
The workshop is outfitted with eye hooks along the walls and a few on the ceiling (skyhooks??) to secure for stability.

I have yet to try it on the Bonne, but that is the plan.
There are too many bikes in there to make room for a bike jack that's too heavy to horse around to another place of less critical value.

Anyways the Bonne is the only one with a frame down there, so the bike lift wouldn't be useful on the bikes that we ride the most.

I am closing in on the day of draining the fluids in the Bonne and giving it a one way ride down the cellar strairs. Let the heirs worry about it!
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Old 07-06-2009, 06:21 AM   #7 (permalink)
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Hi!

I would if I could but they've been shut down.

http://www.getreading.co.uk/news/s/2..._jolly_anglers

I doubt they'll have any luck but it's worth a go
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Old 07-24-2009, 09:10 PM   #8 (permalink)
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T140 master cyl. rebuilding

I just got done trying to bleed the air out of my new stainless (rear) master cylinder, only to find that it's leaking fluid back past the cylinder and into the space behind the dust cover. Oh, well... up to Guy Zerby's old (from the Meriden Days) Triumph shop to buy a rebuild kit today. Just took the nasty bugger back off (I use a screwdriver that I heated and bent into a hook for wrastling with the spring) and am getting ready to have both of the masters, my old original and the new stainless one, apart to see which one I should rebuild.
Now I can kind of tell by looking at it how it comes apart, but the wonderful Haynes book in my possession is totally mum about this. Lest I miss something important, I think I ought to find some literature, or maybe some instruction from somebody who has done this before.
Anybody have a better manual than me? Any pointers here?
PS Guy Zerby has another rebuild kit up there if anybody is having trouble finding one. Around 26 bucks, methinks.
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