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MG MGB Technical - Dual circuit MC pushrod

Hi all,

Please could anyone on this board tell me the full length of a dual circuit MC pushrod? This question had been asked on a french forum this morning and its spare availabilty is an issue?
Thanks in advance.
Guy RENOU

Guy,

I don't have the answer, but I know there are more than one dual circuit master cylinders. At least this is true of USA spec cars.

Charley
C R Huff

Thanks Charley,

I gonna fetch more infos in order to focus the query.
Rgds
Guy RENOU

I got the pushroad length. It 's 80mm long from clevis axis to inner end. Is that accurate for a correct setup?
Guy RENOU

Guy,

I still don't know the answer about the push rod, but attached is a pic of the USA spec MC for 68 to 74. The reservoir is round. I'll also post a pic of the newer one.

To answer your question on the other post, on the web site of a vendor of the TRW MGB masters there are big red letter saying that the warranty is void of silicon brake fluid is used.

Charley

C R Huff

Guy,

Here is a pic of the 75 to 80 USA spec master.

C R Huff

The second one is used with the integral servo, the first one isn't. The push-rod for the second one looks to be significantly longer than the first as it has to go through the servo (and interact with it) before it reaches the master cylinder proper.
Paul Hunt 2010

PS. Looking at a single-circuit (unboosted) master push-rod I'd say 80mm was the shorter of the two. FWIW.
Paul Hunt 2010

Many many thanks Charley and Paul.
I can now provide you with a .gif of this MC, which definitiveley looks like the fist pic.
Could you please answer the request now?


Guy RENOU

Not sure what the question is, but that is the earlier unboosted dual master. The push-rods for those have a different part-number to the single-circuit ones, which are the only ones I have available to measure, that master was never used in the UK.
Paul Hunt 2010

Thanks Paul,
I bet this car had come from USA but owner deosn't point it out. So if someone knows the end to end pushrod lenght, he is welcome.
Guy RENOU

I have one, I will measure it tomorrow.

Colin
Colin Parkinson

Hi,
I measured mine, between clevis hole axis and rod end, length is 75 mm
Regards
dujuvejd

Attached is a pic of the standard push rod for clutch and brake, length between centre of hole and end of rod is 68mm, and the dual circuit one is 80mm, centre of hole to end of rod.

Colin

Colin Parkinson

Thanks a lot Colin and all contributors,
I transmit all these data to my colleague, it's quite relevant and veru well documented that way
Best regards.
Guy RENOU

This thread was discussed between 09/03/2010 and 15/03/2010

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