348 Whats Up with My Parking Brake??? | FerrariChat
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348 Whats Up with My Parking Brake???

Discussion in 'Technical Q&A' started by 348Jeff, Mar 8, 2012.

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  1. 348Jeff

    348Jeff Formula 3

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    #1 348Jeff, Mar 8, 2012
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  2. bosshog8

    bosshog8 Formula Junior

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    #2 bosshog8, Mar 8, 2012
    I would look at the wheel side to see why there is so much slack. Why is it so gnarly looking?
     
  3. ernie

    ernie Two Time F1 World Champ
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    #3 ernie, Mar 8, 2012
  4. Dr_ferrari

    Dr_ferrari Formula 3
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    #4 Dr_ferrari, Mar 8, 2012
    Little overkill on the copper antiseize...

    Remove the rotors and check the Park brake shoe lining and adjustment. once that is adjusted you can adjust the cable in the picture above.

    Also, it is possible that one of the cables came loose in the wheel.

    Regards, Jim
     
  5. 348Jeff

    348Jeff Formula 3

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    #5 348Jeff, Mar 8, 2012
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    Thanks for link Ernie - Ive had a read of that before Id even started - its a good link :)

    Ive stripped down the LHS and there was nothing particularly bad there - seems to still have plenty of friction material on the shoes. I intend doing the same on the other side today so unless I discover something unusual there I'm a bit confused. Brakes have been adjusted by releasing lever fully then adjusting the cog with a screwdriver so that it is tight as I can get it without the brake disk catching/dragging????
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  6. 348Jeff

    348Jeff Formula 3

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    #6 348Jeff, Mar 8, 2012
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  7. ernie

    ernie Two Time F1 World Champ
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    #7 ernie, Mar 8, 2012
    Thanks for the update Jeff.

    When adjusting the parking break you want just an ever so sliiiight amount of drag. Not a whole lot, just a teeny tiny bit.
     
  8. 348Jeff

    348Jeff Formula 3

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    #8 348Jeff, Mar 9, 2012
    Thinking about it thats most probably what my problem is. I'm adjusting them so that they will rotate with just the slightest/maybe no drag on the wheel. Worrying about cooking my brakes by overtightening!

    On other cars Ive had with similar arrangement Ive even put the wheel back so you have better leverage before checking whether there is "drag" or not.

    Ive got all new springs/plates/clips coming today soIll replace all them on the side Ive done plus strip down and do the other side then give it another go.
     
  9. Miltonian

    Miltonian F1 Veteran

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    #9 Miltonian, Mar 9, 2012
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    Your rotor looks a little strange to me, I wonder if perhaps it isn't a Brembo rotor, and perhaps the "drum" diameter is larger than it should be. I happen to have a brand new 348 Brembo rear brake rotor sitting here, I'll attach a picture corresponding to yours. I don't have a tool to measure the inside diameter of the drum portion, but it appears to be almost exactly 180mm.
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  10. 348Jeff

    348Jeff Formula 3

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    #10 348Jeff, Mar 10, 2012
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  11. PAP 348

    PAP 348 Ten Time F1 World Champ
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    #11 PAP 348, Mar 11, 2012
    That will do it Jeff! :eek:

    You can have those shoes re-lined, probably the cheaper way to go about this job. :)
     
  12. 348Jeff

    348Jeff Formula 3

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    #12 348Jeff, Mar 12, 2012
    I did consider religning but if you notice the shoe in the top pic th backing plate is deformed so going to go for some new ones - must admit they are pricey though! :-(
     
  13. PAP 348

    PAP 348 Ten Time F1 World Champ
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    #13 PAP 348, Mar 12, 2012
    Ah, I see it now. What a shame and yes, they are not cheap.
     
  14. 348Jeff

    348Jeff Formula 3

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    #14 348Jeff, Mar 15, 2012
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    New shoes and good news! :)

    Ferrari wanted £250 UK Pounds for a set of 4 shoes but bought some Apec (SHU732) for £31 from a local motor factor :)

    I had to completely loosen off the adjuster under the car to fit them and after putting them on even before tightening the adjuster the handbrake will hold the car on about 6 clicks - hurrah! Didnt have time tonight but will be adjusting it to hopefully hold on 3-4 clicks

    Bit more detail here:

    http://www.clubscuderia.co.uk/forum/showthread.php?45388-348-DIY-quot-Restoration-quot/page45
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  15. 348Jeff

    348Jeff Formula 3

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    #15 348Jeff, Mar 17, 2012
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    Well adjusted my handbrake again today and now getting a good solid feel after 3-4 clicks so it does look like it was done to the worn shoe(s)
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  16. ernie

    ernie Two Time F1 World Champ
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    #16 ernie, Mar 17, 2012
    Thanks for the update, and don't for get to add the parking brake info to the 348 part interchange thread.
     
  17. 348Jeff

    348Jeff Formula 3

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    #17 348Jeff, Mar 17, 2012
    Done! :)
     
  18. kingsdare

    kingsdare Karting

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    #18 kingsdare, Mar 19, 2012
    If I'm reading your post right, it looks like you adjusted your parking brake, then found the problem, replaced the shoes, checked their adjustment and now everything works.

    This method will cause your brake shoes to engage with just a small portion of the surface instead of the whole shoe.

    Back off your parking brake adjustment first, make sure there is plenty of slack in the cable. Then adjust the brake shoes at the wheels. Then adjust the parking brake cable. You want to adjust the brake cable so the parking brake handle sets the brakes tight at about 1/2 to 2/3 of its full travel.
     
  19. 348Jeff

    348Jeff Formula 3

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    #19 348Jeff, Mar 19, 2012
    Nearly!! :)

    What I did was adjust the handbrake cable under the car/driver's seat area via the 2 nuts but the adjustment maxed out with the handbrake lever still coming up far too high.

    Disassembled rear discs/shoes to find that one one side one shoe had only a little amount of friction material on and the other none! :-(

    Replaced both shoes on both sides along with new shoe retainer hardware/cleaned and relubed adjuster and bottom control arms and removed rust from outer edge of disc to make it easier to fit over new shoes and just sanded leading out edge of shoes again to make it easier for the disc to go on.

    I then fitted the disc and applied the handbrake on and off a few times then adjusted the cog with a screwdriver through the hole as best I could (see comments above about it fouling on spring). I reiterated this process until I thought I could hear the shoes just about starting to make contact with the disc (this was all done with the caliper and pads removed to avoid misleading noises. Once done caliper and disc was put back on.

    Once both sides were then done I then started tightening the adjuster nut under a bit then etried the handbrake handle until I got 3-4 clicks on handbrake locking the wheels - this was tested with wheels bolted back on car so I had greater leverage to try and turn the hub. When satisfied with this I then tightend up the second nut to lock the first adjusting nut in place. Does this sound ok?

    NB I know what you mean about adjusting shoes - its almost like a hinge where the tops must be adjusted so they touch/just miss the inside of the brake disc since its just the bottom of the shoe that is moved when the handbrake is applied.
     
  20. WJHMH

    WJHMH Two Time F1 World Champ
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    #20 WJHMH, Apr 26, 2012
    I'm having this issue right now, a had a driver service take the car to a Manheim auction yesterday & it didn't sell, whoever was driving it had the parking brake up for most of the trip. New pads, possible warped rotors, E brake internals, etc.. What a clusterf*ck.
     
  21. BT

    BT F1 World Champ
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    #21 BT, Apr 26, 2012
    Sorry about the misfortune William! The odd operation of the parking brake would let some novic drivers leave with the parking brake engaged. Since the handle lowers back down after engaging them a person might think the car is just tough to work the clutch and burn up your shoes. I feel for ya!

    :(
    BT
     
  22. WJHMH

    WJHMH Two Time F1 World Champ
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    #22 WJHMH, Apr 26, 2012
    You would think a red warning light on the center dash would be a hint. I'm going to take a crack at it in the morning & let you know what happens.
     
  23. 348Jeff

    348Jeff Formula 3

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    #23 348Jeff, Apr 27, 2012

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