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22nd September 2019, 18:18 | #101 | |
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23rd September 2019, 11:16 | #102 |
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I've just come across this topic. I hadn't heard of it being an issue but then I haven't owned a 75 before now.
Interesting though. Because I work in a Ford and Mazda main dealer and there are ABS related oddities on some of their models; The modern Mazda's such as 2012/13 onwards Mazda 6 and the CX5 have sinking brake pedals when engine is running. I have carried out a routine brake fluid change/bleed and this makes no difference. The pedal sinks when engine running, but not when the engine is off - solid as a rock and no sinking when engine off. The Fiesta 2008/9 ish onward shape can suffer with a very poor brake pedal travel/feel. The pedal can be pushed quite a way before braking occurs. No amount of normal bleeding cures the problem. The solution is an 'IDS brake fluid bleed'. IDS= Fords diagnostic machine. This always cures it. It does mean a brake fluid change on a Fiesta can cost £100 not £40. Last edited by ashy90; 23rd September 2019 at 12:18.. |
24th September 2019, 01:00 | #103 |
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I have a theory on this, air or old moisture rich fluid remaining in the ABS modulator is released at some point either through a purging cycle or activation. So the pedal softens slightly. The T4 operation flushes this out to avoid it.
I believe I noticed a slight difference last year after purposely activating the ABS on ice (straight line no traffic etc of course). I had, two months before, flushed and replaced brakes and fluid. I wouldnt even say it was softer, but there was a difference after, in saying that, I cannot deny any placebo effect either. As a sinking pedal, all diesels I think will do this when stationary and idling as the vacuum builds. Still idling, pump it a few times, and it will solidify, then hold the pedal, and it will sink again as the vacuum rebuilds. This was what caused my mothers sinking pedal!!! 'I thought it didn't slow down the way it used to'
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It is not gloss primer .............. it is duct tape silver! Last edited by clf; 24th September 2019 at 01:20.. |
24th September 2019, 01:17 | #104 |
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nothing to see here
refreshing after the 2am site server shutdown reposted the same message
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It is not gloss primer .............. it is duct tape silver! Last edited by clf; 24th September 2019 at 01:21.. |
28th September 2019, 10:51 | #105 | |
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I'm going to need to drain the brake fluid out of the system in order to change over the modulator. Am I understanding this correctly that filling the system via the bleed valve on each caliper is the method to fill both circuits in the ABS modulator? Is this not travelling the wrong way through the master cylinder? Apologies for my ignorance. |
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28th September 2019, 14:15 | #106 | |
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However when using this method the master cylinder is OPEN circuit and the fluid will return to the reservoir which will need to be monitored and the excess fluid drained off. |
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28th September 2019, 16:39 | #107 | |
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Does ignition on make the ABS modulator open circuit, or does the engine need to be running? Thanks. |
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28th September 2019, 23:29 | #108 |
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It makes no difference which way you do it.
We used to refill the conventional way but lately we fill from bleed nipples, as it's quicker to remove all air bubbles. We have a T4 but never had to use it to bleed the system or the modulator.
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29th September 2019, 10:22 | #109 | |
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Is it the VS820? https://www.amazon.co.uk/Sealey-VS82...c=1&th=1&psc=1 |
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29th September 2019, 10:45 | #110 | |
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As I said in the previous post the circuit through the master cylinder is OPEN CIRCUIT at rest. The piston moves back PAST the filler hole from the reservoir. This is how the fluid in the master cylinder is automatically topped up. This through-hole is closed off as the piston moves forward under braking.--- |
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