Alternate Brake Master Cylinder

[scotty2]

I had difficulty getting a new master cylinder for my 820. I found these from and MGTF 500 which seem the same apart from the hydraulic feed to the clutch from the reservoir. That (reservoir) could be transferred from the old one I suppose.

Anyone know if the TF 500 could be adapted?

[scoobyh123]

I think you'll have to be a pioneer on this one Scott! Don't forget though, just because it looks the same on the outside, it doesn't always follow on the inside - SJC10007 and SJC10005(?) look the same but the first is for ABS the second non-ABS.

Just looked up the clutch hydraulics on an MG TF :


https://rimmerbros.com/Item--i-STC100083P

I'll let you draw your conclusions but i think i know what they will be!

[mercedade]

I think I'm correct in saying that the only genuinely critical element that needs to match up is the number of hydraulic connections, and the bore size of the master cylinder. Everything else could theoretically be adapted (eg connection threads, reservoir locations).

Doesn't answer your question though, I appreciate!

[scoobyh123]

I think I'm correct in saying that the only genuinely critical element that needs to match up is the number of hydraulic connections, and the bore size of the master cylinder. Everything else could theoretically be adapted (eg connection threads, reservoir locations).

Doesn't answer your question though, I appreciate!

That's the point i was making Adrian, it's possible to fit a non-ABS master cylinder directly in place of an ABS one but because of the internals, they are different and won't necessarily work correctly.
That's why i don't know if the Chinese master cylinder (as fitted to late MG TFs) is similar in operation to the SJC10007 which was the original Rover 800 ABS unit (except KV6 models, they had a different master cylinder mounted on the left with a cantilever system to transmit the brake pedal travel) so difficult to say.