 | Home > Puma (Tdci) > Constantly bleeding brakes |
 
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84   
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Hi guys
Bled my brakes a few times now and got them working great. Defender sits in the garage a week and they need bleeding again. Pedal goes straight to the floor. No fluid leaking, but obviously air is getting into the system some how Any ideas how to solve please ? Thanks |
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9th Jul 2025 4:50pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8318  
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When you say air is getting in is that because your seeing it come out when you bleed them or is it an assumption. If you have air coming out then is it at all.four corners? If no air but they improve with pedal pumping then possible mc. Cheers James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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9th Jul 2025 10:18pm |
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| revd Member Since: 20 Apr 2024 Location: England Posts: 269 
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I had a metal brake that ran along the back axle on my old 90 - it had partially chaffed through and was porous but not enough drip fluid
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9th Jul 2025 11:20pm |
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84
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Yeah I’m getting air bubbles on the front brakes every time I bleed them.
The back brakes no bubbles. Thanks for replies so far, Kev |
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10th Jul 2025 3:53pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5971 
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Both fronts?
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10th Jul 2025 4:55pm |
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84
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Mostly the front right, furthest from the master cylinder
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10th Jul 2025 5:36pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8318
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I'd check union's on copper pipe and flexi, if problem persists replace copper pipe. Cheers
James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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10th Jul 2025 10:42pm |
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84
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I checked everything I can reach, no signs of leaking on the pipes, unions or hoses.
I will bleed again and hope it lasts a while. I am surprised air is getting in but I can’t see any fluid leaks or reservoir level going down. |
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12th Jul 2025 3:11pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8318
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How are you bleeding it? Vacuum?
Leaving pressure bleeder on it overnight is a good way of highlighting failure points. Air is either not all coming out or its getting in. Cheers James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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12th Jul 2025 4:19pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5971
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Is it an ABS vehicle?
All the pump and fittings look ok? |
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12th Jul 2025 5:25pm |
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84
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Yes it’s abs, I managed to turn one of the fittings on the abs unit a little bit.
But there was no signs of leakage around the fittings. Going to bleed all brakes tomorrow and see how long it lasts. |
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12th Jul 2025 7:01pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20910
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Any signs of any leaks around the PRV? (If fitted?). _\Hennessey|Venom| F5/___
___\⭐️Lone|Star|State/___ ____\We|Will|Win/___ ____/🇬🇧🇺🇸\____ _//*⛽️🛢️⚙️🧰*\\_ |
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13th Jul 2025 4:53pm |
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| Kevlar Member Since: 28 Oct 2020 Location: Prague Posts: 84
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Can’t see any leaks anywhere, not from the brakes anyway 😀
I just bled them again, loads of air from front right caliper. Brake pedal is solid now, going camping tomorrow so I will see how brakes perform. |
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16th Jul 2025 5:54pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5971
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Try clamping flex pipe to that one calliper and see if air coming in that corner
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16th Jul 2025 8:03pm |
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