What master cylinder ?

[tvrgit]

If you disconnect the two big nuts that hold the master cylinder onto the servo, you might just be able to pull it forward far enough, without disconnecting any brake pipes, to be able to get your fingertips in and feel if there's any brake fluid between the two - if there's no fluid, it's not leaking past seals, even under hard or prolonged braking.

[scotty_d]

I was £58 from my local factors for mine with a reservoir.

[Brummmie]

scotty_d said:

I was £58 from my local factors for mine with a reservoir.

Did you fit it yourself?
Can you leave the steering column in place?

[scotty_d]

Brummmie said:

scotty_d said:

I was £58 from my local factors for mine with a reservoir.

Did you fit it yourself?
Can you leave the steering column in place?

I did yes. I had to drop the pedal Box down a little but did not need to remove it and did not touch the steering set up at all. It is not too bad a job few hours work but not the worst i have done on a TVR by far.

[ridds]

Hmmmm, there are 2 XR2i master cylinders, one with and one without ABS.

I'm guessing ours is without ABS?

If so LM39000 is the number. £34.50 +vat from my local motor factors.

[scotty_d]

ridds said:

I'm guessing ours is without ABS?

That is the one i went for as long as it has a bore diameter of 22mm IIRC (double check ) it will be fine.

[Brummmie]

That LM number is XR2i but it does not fit mine....
I got the old one out and its not even close, the res holes are different even, took it back to my local motor factors and they will try and match it up.

[ridds]

Bugger, picked mine up today as well...

[ridds]

This might be useful....

Here

Wish I'd found that link sooner. The equiv parts thread needs a serious update in this area!!!

There's one on ebay Here

[ridds]

Right ordered an MCY301 with the reservoir so will see how they fit.

Stangely, all the part numbers on the Page I linked reference the LM39000 number as the replacement.

So either you have an odd car Brummie or the Cerb uses something different again for its braking!

[ridds]

Right ordered an MCY301 with the reservoir so will see how they fit.

Stangely, all the part numbers on the Page I linked reference the LM39000 number as the replacement.

So either you have an odd car Brummie or the Cerb uses something different again for its braking!

[Brummmie]

well, here is the box it came in, Ford no 6088076 and LPR no 1258.
The bore is slightly smaller but road test is fine, brakes are as evil as ever.
I am going to try RC6E compound brake pads all round this time.



and old vs new.

[Brummmie]

I've found out what it fits Ford wise, it is XR3i, Mk3&4 84-90.
Also Orion.

[Brummmie]

I have booked a Track "taster" on Friday at Rockingham, its a lunch time gig for an hour, only £30, but that will give me long enough to see if its cracked it!

[Cerbieherts]

I had this issue, was previously living in hot climate, red rose, 4 or 5 track laps and the pedal was poo. Replaced the master but also added new heat shielding to r/h inner wing and wrapped the ex. Manifolds; didn't have the issue re-occur...

[Brummmie]

I Have got to the bottom of the pedal issue at last....
Replaced the master cylinder, went to Rockers and the pedal STILL went to the floor

Back to the drawing board.
I resealed the calipers (£30 for the kit) one piston was stuck fairly fast with general crud, and also, i think this was the rub (literally), the oversize disc i am using was catching the roof of the caliper, as it got hotter the more it rubbed.
Careful re alignment of the caliper (there is some slack in the holes) without the pads in, and a good look at the clearance and viola!
Silverstone the brakes were perfect, outrageous in fact.

If people on standard discs are getting this trouble, i suspect sticky seals...

[scotty_d]

Good stuff good to know you have "stopage" power again with that beast of yours. It makes sense that it is sticky calipers they are all getting to the age where a seal kit and maybe even new pistons wont go a miss.

[FarmyardPants]

So the soft pedal was caused by the fluid boiling due to the pad being constantly pressed against the disk due to the seized piston, presumably?

[Brummmie]

FarmyardPants said:

So the soft pedal was caused by the fluid boiling due to the pad being constantly pressed against the disk due to the seized piston, presumably?

Yes, plus the metal to metal of my disc/caliper interface.
Like i say, you guys with standard set ups, sticky pistons would be the lone cause.