Clutch Master cylinder identification!
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  1. #1
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    Clutch Master cylinder identification!

    Went for a spin the other day in my Moggie but the clutch pedal hit the floor when I fired her up, grrr.

    Im running Rover SD1 V8 running gear and manual box. The slave was standard SD1 fitment & I purchased an SD1 kit to fit the master, but its totally different to what ive physically got fitted.

    The master cylinder has nothing etched on it and no numbers or clue as to what its from. I assumed, and was told it was SD1 which made sence to me, but the bores quite large 15mm. The sleeve the main seal which has gone has an internal diameter of 10mm, the SD1 kit I had was only something like 5mm, so way too small.

    ANyone recognise one of these???



    Seal for reference and where it goes.





    ANy help guys?? Without randomly ordering items I\'d rather get some feedback from ppl if you can help guys!

    Chap down at Moss was uber helpfull, but alas nothing in their range. Rimmer Bros wern't any help what so ever, they reconed it was original Morris Minor clutch master cylinder! hmmmm.

    I assumed SD1, someone else has said Austin 1800 landcrab.
    Probably not the best place to ask, gotta be a few ppl out there running Brit running gear!

    Cheers in advance! Have posted on the MMOC and NSRA sites to no avail!

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    Official RnS Addict scooder's Avatar
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    I'm sure Kapri will pop along in a bit dryboliks is his area. He will need to know the bore size of the master cylinder. But you probly knoe that Rimmers are very wrong Moggys got a mechanical clutch linkage!
    Martin.

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    Official RnS Addict scooder's Avatar
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    Just re read it is the bore 15mm or 5/8"?

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  6. #4
    I'm Not Jed Clampett stueeee's Avatar
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    Morris Marina 1300 clutch Master? That's about 15mm bore.
    Stuart.
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    Off the Xmas card list kapri's Avatar
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    kapri is online now
    http://cgi.ebay.co.uk/TRIUMPH-HERALD...item53dc7c905b


    http://cgi.ebay.co.uk/Clutch-Master-...item2c51eba625


    Part numbers are different in the listings.

    SD1 bore is 15.9 , as is the Spifire /Herald . For them to have different parts numbers I woudl presume the difference lies in the thread on the brake line take off ( 3/8th as standard but could be 7/16ths UNF on teh SD1 ) or in the pushrod end fit /length.

    As you can see in the pictures the rods are different lengths but should be interchangable by removing and changing the circlip IF the brake thread sizes match up.


    Were there two seals in the SD1 kit as the smaller one goes on the end of the spring which is a one way valve to stop pressure being lost into the reservoir when you push on the pedal .
    Last edited by kapri; 11-12-2009 at 20:35.

  8. #6
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    Cheers for the help guys.

    Much appreciated.

    Ive got myself one shiney new GT6 Master cylinder ready to fit. Ive still no idea what the old unit was, no was triumph unit. The issue I have now is the thread coming from the cylinder down to the slave.

    Anyone know the size of fastner that triumph use on these couplings? Im looking at using banjo connections and a rubber tube rather than the copper pipe that was previously installed.

    On the look out for some suitable Banjo Units, will sleeve and jubilee clap the slave end but the master cylinder I need a banjo connector. Any leads!


  9. #7
    I'm Not Jed Clampett stueeee's Avatar
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    Fitting will almost certainly be either 3/8" or 7/16" UNF on a master cylinder from a GT6. Using braided fittings like those available from speedflow http://www.speedflow.co.uk/ would give you a connection that is more reliable than something connected with jubilee clips, pressures are still quite high in a clutch circuit even though they're not as high as those in the brakes.
    Stuart.
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