Maserati Merak clutch slave query | FerrariChat

Maserati Merak clutch slave query

Discussion in 'Maserati' started by Riddler55, Feb 14, 2023.

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  1. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
    i have been trying to replace the clutch slave cylinder on my Merak but have been told they are unobtainable and the only option seems to be a costly rebuild.
    BUT I have been informed that a brake cylinder from a Massey Ferguson is exactly the same part. I enclose a link to one below.
    Seems incredible to me - but just wondered what members think?
    Brake Slave Cylinder (3537812M91)
     
  2. Ferraripilot

    Ferraripilot F1 World Champ
    Owner Project Master

    May 10, 2006
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    John!
    It is indeed the Massey Ferguson slave cylinder. It’s either been an incredibly well kept secret for many years or no one knew until very recently when I believe it was Claus in the Merak group made the discovery
     
  3. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
    Great. The question is - will it cope with the LHM fluid because presumably it normally would have brake fluid in it? I know the LHM stuff can destroy rubber seals etc unless they are of a certain kind?
     
  4. staatsof

    staatsof Nine Time F1 World Champ
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    Why don't you join the Merak Group and ask. The rubber utilized for brake fluid system will not survive usage by LHM. Do you know which system your car has?

    https://www.eurospares.co.uk/Maserati/Merak/Merak_3.0/PartDiagrams/010/Clutch The clutch slave on the LHM system cars is not the same as the Massy Ferguson one. Wildly different.
     
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  5. belfry

    belfry Formula Junior

    May 14, 2015
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    Robert Batt
    I had mine rebuilt for something like £90 here in the UK.
     
  6. belfry

    belfry Formula Junior

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  7. staatsof

    staatsof Nine Time F1 World Champ
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    The green color is curious. Is your's a LHM car or brake fluid?
     
  8. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
    Excellent. Where was that?
     
  9. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
  10. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
    Thanks for that Staatsof
     
  11. staatsof

    staatsof Nine Time F1 World Champ
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    Maserati, especially under DeTomaso, changed things on these cars quite often. The last series of Meraks the SS model got the 3.0L V6 and the LHM system was deleted entirely from the car.

    That diagram from Eurospares doesn't show all the variations, just the LHM version and it has the LHM assisted clutch just like the Khamsin. Their website used to be much better in documenting the parts diagrams.

    So ... there might have been a version with a brake fluid based clutch system like on the Bora that retained all the other LHM functions.

    Which is why I kept asking everyone which style of hydraulic fluid was in their clutch circuit. If yours looks like the one in that diagram then it's definitely a LHM clutch circuit. The Eurospares diagram does not show the brake fluid circuit's parts which are possibly the ones that match the tractor's.
     
  12. Riddler55

    Riddler55 Rookie

    Feb 14, 2023
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    Robert Ridley
    My car definitely has a clutch system that runs on green LHM fluid. It is a European RHD 1977 Merak SS
     
  13. thecarnut

    thecarnut F1 Rookie
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    Apr 22, 2006
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    The LHM brakes were deleted on the USA SS version but was kept for the Euro version. I believe only the Euro A80 and the USA SS models did not have the LHM brakes. Walter should be able to verify this as I believe he has a A80 model.

    Ivan
     
  14. staatsof

    staatsof Nine Time F1 World Champ
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    Then forget about the tractor substitute. Not only is the the rubber incompatible but so is the basic operation.
     
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  15. belfry

    belfry Formula Junior

    May 14, 2015
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    It’s LHM. The Citroen accumulators are also a similar green.
     
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  16. staatsof

    staatsof Nine Time F1 World Champ
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    That was my guess but the one in the parts catalog drawing doesn't seem to look quite like yours? Ah the mysteries of Maserati production ...
     
  17. Riddler55

    Riddler55 Rookie

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    Where did you get yours rebuilt please?
     
  18. Kiwi Merak

    Kiwi Merak Rookie

    Jun 21, 2024
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    Sean Parsons
    Hi, I appreciate that this is a very old thread but I am looking for a replacement clutch slave cylinder for my 1978 Merak SS here in Auckland NZ. I see that you managed to get yours rebuilt in the UK. Are you able to steer me towards anybody that has a stock of replacements, or who can rebuild mine?
     
  19. belfry

    belfry Formula Junior

    May 14, 2015
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    I’m sorry, but I think the restoration was done via a garage, so I’m not sure that I got a separate invoice for this work. That said, there are very few parts involved so any clutch engineering firm should be able to restore yours in NZ. From memory there’s the alloy housing, a stainless shaft, a spring and a couple of gaskets and o rings.

    When I get home at the weekend I’ll look in the history file to see if I do have a name for you. But in the meantime I’d take yours off and show it to a local clutch expert.
     
  20. staatsof

    staatsof Nine Time F1 World Champ
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  21. red27

    red27 Formula Junior

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  22. gcmerak

    gcmerak Formula 3

    Mar 17, 2008
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    Hello All

    We in the Merak Group have investigated the details of the clutch slave cylinder. This is the overview as it relates to all Meraks. All non-SS models used the Citroen SM (Sport Maserati) clutch slave cylinder LHM based unit.

    All USA Merak SS, Tipo 80, & Merak 2000 used the Massey Ferguson clutch slave cylinder units. There are two Massey Ferguson units. One is LHM based and one is DOT 4 based. My personal preference is to use the LHM based Massey unit because replacing the LHM seals with DOT 4 seals is fast & easy. All remaining connections from the old unit are a direct fit.

    All remaining Euro Merak SS (non-Tipo 80) used the Citroen CX Prestige clutch slave cylinder. The Group concluded that purchasing this as a new unit is elusive at best. Doing a rebuild of the existing unit is the most prudent way forward.

    I hope this helps. I would like to know how the rebuild of the Citroen CX Prestige unit has worked out for those taking that route.

    Ciao,
    George
     
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  23. thecarnut

    thecarnut F1 Rookie
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    I've rebuilt the clutch slave cylinder on the Khamsin which I assume is the Citroen unit. Not that difficult.

    Ivan
     

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