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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Bash Thrash

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    8/22/2022 4:29 PM  #1

    Alan
    I FYI 24-7

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    From: Axtell KS
    Registered: 4/03/2013
    Posts: 516

    Bash Thrash

    Took the coupe to work this morning to get some miles on. Coming home, got about 4 miles from home and seemed like i was losing power. Downshifted, slowed down and continued on. Little further on started getting some vibration in the steering wheel and started smelling brakes. Stopped on my corner and saw some smoke come out of the drivers side wheel. Limped the half mile home.
    Have 76 Granada disk brakes on the front. Any suggestions? Sticking caliper? Don't know if i will get to it tonight, have a birthday party to go to.
     

    67 Coupe, 5.0 EEC IV Fuel injected. T5, 3:70 rear
     

    8/22/2022 5:13 PM  #2

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,850

    Re: Bash Thrash

    Brakes  OR  wheel bearings!.......Let's hope its brakes.
    If it smelt (ain't that a durn fish?!)....prolly brakes and all.
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    8/22/2022 5:42 PM  #3

    Alan
    I FYI 24-7

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    From: Axtell KS
    Registered: 4/03/2013
    Posts: 516

    Re: Bash Thrash


    Pad warmed up enough to boil something out of the rivet.

    67 Coupe, 5.0 EEC IV Fuel injected. T5, 3:70 rear
       •Thread Starter
     

    8/22/2022 7:47 PM  #4

    Nos681
    Senior 24-7 FYI Addict

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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,329

    Re: Bash Thrash

    Can rotor be spun by hand?
    there will be some drag but can still rotate.
    How does it spin with caliper removed?

    Did you lube the edges where caliper slides against bracket and retaining bracket?

    Are both the caliper and bracket free of nicks that could catch one another?

    Try pressing the piston in completely and pump up and bleed.

    I’d start simple for troubleshooting.

    If it happens again, I would get a rebuilt caliper.
    Piston might be sticking in the bore.

    You can pop the piston out with compressed air, just have a block of wood/rag to prevent damage to piston surface.  Perhaps some debris/rust inside?

    That’s all I got.

    BTW, I had great stopping with semi-metallic pads for taxi/police cars.
    Organics were terrible.

     

    8/22/2022 8:54 PM  #5

    Alan
    I FYI 24-7

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    From: Axtell KS
    Registered: 4/03/2013
    Posts: 516

    Re: Bash Thrash

    i had put rebuilt calipers on it when i put the brakes on, but that has been 8-9 years ago. Maybe 2000 miles on them, but they sat for 6 to 7 years while i rebuilt everything else. I jacked the wheel up and it turns with a little resistance. I will dig in tomorrow night.

    67 Coupe, 5.0 EEC IV Fuel injected. T5, 3:70 rear
       •Thread Starter
     

    8/22/2022 11:16 PM  #6

    50vert
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    From: QLD Australia
    Registered: 4/01/2013
    Posts: 1,422

    Re: Bash Thrash

    Could also be a collapsed brake hose that's not releasing pressure.

    "Those telephone poles were like a picket fence"
     

    8/23/2022 8:38 AM  #7

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,246

    Re: Bash Thrash

    Be sure master cylinder is not being actuated by too long pedal rod or booster output shaft. And caliper slides without impediment.
    Outside pad dragging is typically caliper slide. Inside pad usually stuck piston, swollen hose or master cylinder not releasing.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/09/2022 4:18 PM  #8

    Alan
    I FYI 24-7

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    From: Axtell KS
    Registered: 4/03/2013
    Posts: 516

    Re: Bash Thrash

    Drove the 67 to work today. 20 mile trip. I think something is going with the master cylinder. Just one brake hung up last time.  Put on a new hose and rebuilt the caliper. Today when i got home, it seemed like the brakes are dragging again. Put it on the lift and i can turn the wheels but all are very tight.
    Put the brakes and new master cylinder on 8-9 years ago and did not have any trouble back then. I know i set the pedal rod with  a little gap.  Could the mc be sticking or any good guesses?
     

    Last edited by Alan (9/09/2022 4:21 PM)

    67 Coupe, 5.0 EEC IV Fuel injected. T5, 3:70 rear
       •Thread Starter
     

    9/11/2022 2:32 PM  #9

    BobE
    Senior 24-7 FYI Addict

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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,639

    Re: Bash Thrash

    Discs/drums or all discs?  Vacuum assist?  Do you have a residual or proportional valves?  Assuming you have a dual master cylinder. 
    If all 4 wheels are tight to turn, seems like the pressure is not being relieved back to the MC.  Does the brake pedal seem to be lower than normal; did you try to pull up the brake pedal?
    I have also seen a vacuum booster get stuck in the ‘brakes applied’ position.
    Hope this helps.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    9/11/2022 5:16 PM  #10

    Alan
    I FYI 24-7

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    From: Axtell KS
    Registered: 4/03/2013
    Posts: 516

    Re: Bash Thrash

    4 wheel disc brakes, Pb-1 proportional valve, vacuum assist boost.
    After i checked the wheels, went out half hour later and all but the left front turned freely. That is the wheel i just put a new hose and rebuilt the caliper. It is either the mc or the booster. Not sure which yet.
    Pedal seems normal.
    It is coming to the Bash, (on a trailer)
     

    Last edited by Alan (9/11/2022 5:18 PM)

    67 Coupe, 5.0 EEC IV Fuel injected. T5, 3:70 rear
       •Thread Starter
     

     

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