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Author Topic: Precautions against debris when pushing back Astra brake pistons  (Read 2916 times)

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Sir Tigger KC

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #15 on: 09 December 2018, 16:43:55 »

I've never clamped the hoses when changing brake pads either, but seeing the advice in Haynes when I changed the Mondeos rear pads last year I thought I'd give it a go.   :y

What a faff! I ended up juggling the caliper and the wind in tool. The tube kept falling off the nipple and I manged to knock over the jar that the brake fluid was going into!  ::)  ;D

I'm sure it's easy when you know how!  :D
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henryd

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #16 on: 09 December 2018, 17:53:21 »

I always release breed nipple when doing Vauxhall pads,had a set of seals turn on an Astra years ago and been wary ever since
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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #17 on: 09 December 2018, 18:44:56 »

As their suggests ..... they're flexible and easily cope with being squashed. Obviously you don't try to crush the life out of them.  ;)

Andy (and anyone else who does this regularly), can you do the same with braded hoses, or are they more susceptible to being squashed?

I must admit that this is a totally new one on me.
On the bike (never had a car with braided hoses), I actually dismantled the calipers to get all the crap fluid out.  But that had no ABS, so letting it all drain completely didn't result in a huge faff.
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Viral_Jim

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #18 on: 09 December 2018, 19:14:36 »

TBH I'll probably end up just going the middle route and opening the nipples without clamping the hoses and take my chances.  ;)

Next stupid brake related question (thought about it while wrestling the Volvo calipers the other week). What can you use to stop the nipples seizing in the calipers? Luckily a couple of doses of penetrating fluid and a proper spanner freed off the Volvo ones but it did make me think...

Copper slip maybe?  :-\
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Andy H

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #19 on: 09 December 2018, 19:16:15 »

All the standard black rubber brake hoses that I have seen cut open had fabric braid in their construction  (covered over with an outer rubber sheath )

The only time the braid was obvious (without cutting it open) was when I bought Aeroquip hoses with the stainless steel braid  on the outside.
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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #20 on: 09 December 2018, 19:16:27 »

Regular servicing... ie changing the fluid as per manufacturer specs rather than when a hose bursts ::)
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Viral_Jim

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #21 on: 09 December 2018, 19:21:17 »

Regular servicing... ie changing the fluid as per manufacturer specs rather than when a hose bursts ::)

What a novel idea *makes a note*  ;)  :y
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terry paget

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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #22 on: 09 December 2018, 21:48:05 »

Regular servicing... ie changing the fluid as per manufacturer specs rather than when a hose bursts ::)
It was while changing the fluid I discovered that the pads were worn out, probably original and been there 10 years and 110,000 miles. I ordered new pads front and back, should be here Tuesday. The brake hoses look like simple rubber, not braided, but I think I will  skip the clamping and just open the bleed nipples while pressing back the pistons, then bleed. Thanks to all for advice.
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Re: Precautions against debris when pushing back Astra brake pistons
« Reply #23 on: 10 December 2018, 00:19:13 »

I should add, I don't clamp the flexi in this case, the back pressure is huge compared to that of the open bleed nipple, so its not essential.

Also it wont damage them if you are sensible, you can get special tools for this (which have been around for decades so far from a new concept)
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