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Mondial 8 Clutch Slave Cylinder Repair

Discussion in 'Mondial' started by NeedSpace, Jan 29, 2020.

  1. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    #1 NeedSpace, Jan 29, 2020
    Last edited: Jan 29, 2020
    A few months ago, I go out to my car to enjoy the beautiful day. Started it right up and went to put in gear and the clutch drops to the floor with little effort. It also stayed on the floor and didn't return to first position. Crap. A little investigative work and I saw hydraulic fluid on the ground between the front of the engine and the rear seat fire wall.

    Upon closer inspection, the clutch slave cylinder was leaking. Keep in mind, I had never heard of a clutch slave cylinder before. I located a replacement from AW Italian autoparts (good people here) and was ready for the repair. All in it wasn't very hard to do, from 1-10 with 10 being hardest, I'd give it 2-3.

    Removing the pin from the clutch arm was difficult. It wouldn't budge. I used a special clamp I have that looks like a fork with a screw in the middle (sorry no pic). it allowed for me to screw the pin out of the connection.

    The rubber boot was shot on old one. The rubber boot on the original piece was wrong, so I called AW and they sent me a new one. You will note the collar is still on the old one. Other than that the parts looked identical.
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    The new cylinder had a different pin. It took some careful coaxing, but I got the new piece out and replaced with the original. Here you can see the original pin in the new cylinder. Here it is also with the collar on it ready to install.
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    Here it is installed. Attaching it didn't take too much effort
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    Here it is connecting the clutch arm to the cylinder pin. Putting it together was far easier than taking it apart.
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    After it was all in, I topped off the fluid. I bled it like you would brakes using the bleed screw on top of the cylinder and we were back in business.
     
  2. Wade

    Wade Two Time F1 World Champ
    Rossa Subscribed Owner

    Mar 31, 2006
    27,903
    East Central, FL
    Full Name:
    Wade O.
    Nice. Sounds like sourcing replacements that actually work has improved.


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  3. FerrariJB

    FerrariJB Rookie

    Jun 8, 2019
    27
    Netherlands
    Full Name:
    FerrariJB
    Nice job. Was bleeding easy to do?
     
  4. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    Yes, quite easy. Ironically, easier than bleeding the brakes as I didn't have to reach around the wheels. :)
     
  5. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    Agreed. It was a little bumpy needing the correct boot but it was an easy switch. Given how few of these were made, I sort of expect a little trouble sourcing parts. My 911 and my mercedes are pretty easy as they were made in abundance, but my figaro is quite difficult. Comes with the territory.
     
  6. spicedriver

    spicedriver Formula 3

    Feb 1, 2011
    1,647
    That's good, because if you keep the car, you're likely to have to change it again.

    It is possible also to just change the seal. But that's a little bit harder. You can probably find some old threads about that here.

    Also, when the brake fluid leaks onto some metal parts, it will burn off the rust coating. So make sure and clean that up and respray it so the parts won't rust.
     
  7. AndruL

    AndruL Karting

    Apr 4, 2018
    173
    Full Name:
    AndruL
    Congrats on correctly diagnosing and correcting the problem. In my case I opted to rebuild my original one by replacing the rubber o-ring.


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  8. jkstevens2

    jkstevens2 Karting
    Silver Subscribed

    Aug 25, 2015
    167
    Winter Park, FL
    Full Name:
    JK Stevens
    The clutch slave cylinder on my 1986 3.2 had a similar leak. I started noticing the brake warning light coming on that indicated low brake fluid and around that time I noticed the clutch acting funny. My clutch finally went completely flat and I took it into my repair shop. The repair went well and I found out later that the brake fluid and clutch fluid system are connected, one in the same so you might want to make sure there is not any air bubbles in your brake lines. If the brake fluid (hydraulic fluid) got low enough from the clutch slave cylinder failing or when you disconnected the old one...... it might have introduced air bubbles into the system.
     
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  9. jkstevens2

    jkstevens2 Karting
    Silver Subscribed

    Aug 25, 2015
    167
    Winter Park, FL
    Full Name:
    JK Stevens
    AndruL......you amaze me! You are always rebuilding, taking apart and re-manufacturing. Often its from scratch. I wish I had that kind of courage.
     
  10. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    ah good to know. thanks for the pointer...
     
  11. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    I haven't notice any difference in braking but i;ll check.. Thanks!
     
  12. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    I thought about that/ I kept my old cylinder Maybe I'll buy a new boot and o ring and keep it on the read. How may years would you expect?
     
  13. AndruL

    AndruL Karting

    Apr 4, 2018
    173
    Full Name:
    AndruL
    Thanks, jkstevens2. I just don't like paying the exuberant "Ferrari tax" until I exhausted the effort myself.
     
  14. AndruL

    AndruL Karting

    Apr 4, 2018
    173
    Full Name:
    AndruL
    The "replacement unit" that I had (same as yours) only lasted me 2 years with <2000 miles until it started leaking again. This time I decided to rebuild the original myself. Time will tell how long this one will last...
     
  15. NeedSpace

    NeedSpace Karting

    Nov 23, 2012
    55
    Bergen County NJ
    Yikes, let's hope this won't be my continuous repair!
     

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