Defender Defender pulling left when braking





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  1. #1
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    Default Defender pulling left when braking

    Hi everyone,


    yet another issue cropped up on my Puma, only noticeable at highway speeds (>80kmh): when I brake, the car dives to the left.


    Even if I hold the steering wheel straight, the car still does this.


    What could be causing this?


    Thanks
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
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  2. #2
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    Default Re: Defender pulling left when braking

    Brakes aren't balanced. Brakes favouring one side. Might be as simple as bleeding the system. If pads and disks are still in good condition and problem persists it may mean you need to service the callipers (Sometimes the piston can seize due to corrosion).
    1985 Land Rover 110 - 300tdi conversion


    It's always more fun on the road less travelled

  3. #3
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    Default Re: Defender pulling left when braking

    You can take it to a road worthy centre. They can test brakes on a rolling road and tell you which is the offending wheel.
    1985 Land Rover 110 - 300tdi conversion


    It's always more fun on the road less travelled

  4. #4
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    Default Re: Defender pulling left when braking

    Bleed the brakes. See if there is enough pressure to BOTH the front calipers. If one seems to have more pressure than the other, it could be a blocked brake pipe. They tend to perish inside and then block up, especially on older vehicles. Also check the 'sliding mechanism' On most vehicles these are pins, these need to be lubricated, or could seize up.
    1996 Discovery 1 (SOLD)
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  5. #5
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    Default Re: Defender pulling left when braking

    thanks, will take it back to the shop
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  6. #6
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    Default Re: Defender pulling left when braking

    Sit net 'n stukkie lood agter die regter oor.

    Met verskoning aan Tolla.

  7. #7
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    Default Re: Defender pulling left when braking

    The Defender has a 4 wheel disc system and highly unlikely to be a brake problem IMHO. By all means do as suggested but it can also be something else like worn swivel bearings, shock absorbers or steering linkages that are worn. On a live front axle vehicle it can be many things. I speak from experience.

    Please let us know what the problem was if and when you find it. This can be rather frustrating at times.
    We can't change the wind but we can set our sails

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  9. #8
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    Default Re: Defender pulling left when braking

    Could also be a damaged flexible hose from fixed aluminium tube to brake caliper which is expanding under pressure and so brake cylinders not getting full pressure

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  11. #9
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    Default Re: Defender pulling left when braking

    thanks Francois, the Bilstein shocks were last rebuilt/serviced in 2013, probably time to do them again.
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  12. #10
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    Default Re: Defender pulling left when braking

    Quote Originally Posted by Francois Theron View Post
    The Defender has a 4 wheel disc system and highly unlikely to be a brake problem IMHO. By all means do as suggested but it can also be something else like worn swivel bearings, shock absorbers or steering linkages that are worn. On a live front axle vehicle it can be many things. I speak from experience.
    I had violent brake pulling to the left on my old Ser3S. Enough to change lanes! In my case it was pretty simple, but they were from brakes. Some butcher had fitted Ser3 brakes to one side, and 3S brakes on the other. I agree with the points above, but Francois raises some interesting alternative theories.

    More difficult to detect however. You will need to get stuck into the linkages with a pry bar and see what wobbles. Not sure about the steering shock. Will just have to take it off and test it I guess. Those swivel balls are a big job and will certainly discourage you from rushing into muddy crossings with gay abandon once you have seen what is involved in fixing them.

  13. #11
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    Default Re: Defender pulling left when braking

    Quote Originally Posted by Francois Theron View Post
    The Defender has a 4 wheel disc system and highly unlikely to be a brake problem IMHO. By all means do as suggested but it can also be something else like worn swivel bearings, shock absorbers or steering linkages that are worn. On a live front axle vehicle it can be many things. I speak from experience.

    Please let us know what the problem was if and when you find it. This can be rather frustrating at times.
    I had the same symptoms as described by the OP and in my case it was the front wheel bearing on one side that was shot (on a Merc though). The extra play in the bearing pushed the calipers apart on the one side.
    Mitsubishi Pajero 3.2 D-ID GLX LWB

  14. #12
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    Default Re: Defender pulling left when braking

    My D1 did that when the ABS pump packed up. I just removed and bypassed it. Huge improvement in overall braking.

  15. #13
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    Default Re: Defender pulling left when braking

    initial feedback from the workshop is that there's nothing wrong with the calipers nor the braking system.

    As Francois said, it could be something else in the suspension which is causing this, so they're checking other things tomorrow.
    2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
    2015 Range Rover Sport Supercharged V8 HSE Dynamic



    Discovery 4 Workshop Manual: https://bit.ly/2zZ1en9

    Defender Puma Workshop Manual: https://bit.ly/2zXrtKO
    Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

  16. #14
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    Default Re: Defender pulling left when braking

    If something in the suspension I would expect the vehicle to pull when you go over bumps as well, not only when breaking. How did they test the brakes? A slightly warped disk would also cause issues and may not be obvious when inspecting without a clock gauge etc.
    you donít want to get to the point where all suspension bushes etc are changed and the problem persists.
    1985 Land Rover 110 - 300tdi conversion


    It's always more fun on the road less travelled

  17. #15
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    Default Re: Defender pulling left when braking

    A rolling road is probably the only way to check that your brakes are balanced
    1985 Land Rover 110 - 300tdi conversion


    It's always more fun on the road less travelled

  18. #16
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    Default Re: Defender pulling left when braking

    My money is on that pesky rear A-arm ball joint........
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  19. #17
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    Smile Re: Defender pulling left when braking

    Quote Originally Posted by Nitebob View Post
    Bleed the brakes. See if there is enough pressure to BOTH the front calipers. If one seems to have more pressure than the other, it could be a blocked brake pipe. They tend to perish inside and then block up, especially on older vehicles. Also check the 'sliding mechanism' On most vehicles these are pins, these need to be lubricated, or could seize up.
    I had a similar problem on an Autovilla a few years ago. If the vehicle pulls immediately to one side when braking and then corrects itself whilst still braking, it is definitely the hose on the side it initially veers to. If not, it will be something else. Good luck!

  20. #18
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    Default Re: Defender pulling left when braking

    I had a similar problem on my Asia Rocsta many years ago, it end up to be the wheel alignment that was out, nothing to loose to check it out also.
    Before you criticize someone, you should walk a mile in their shoes.

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  21. #19
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    Default Re: Defender pulling left when braking

    Quote Originally Posted by Orxy View Post
    initial feedback from the workshop is that there's nothing wrong with the calipers nor the braking system.

    As Francois said, it could be something else in the suspension which is causing this, so they're checking other things tomorrow.
    A worn balljoint, can cause a car to pull to one side upon braking, but usually causes a pull in the opposite direction when accelerating...
    1996 Discovery 1 (SOLD)
    2009 Corsa Utility 1.7Dti (Everyday drive)
    2001 Mercedes C180 (Soon to be my eldest's car)
    2010 Kia Sedona 2.9Crdi (SWAMBO's ride)

  22. #20
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    Default Re: Defender pulling left when braking

    When I first bough my Disco it used to pull to one side together with a shudder under braking, and it was eventually traced back to a dead tie-rod joint.
    I had the Disco in for wheel alignment (again) to try and diagnose the fault, and the tech doing the alignment picked it up.
    Cheers,
    John

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