V40: - Brakes

delboy62 · Dec 22nd, 2012, 21:24

HI ALL
Been out in car the last 2 times and on both times the brakes seem to fail for about 5/10 seconds , now could be brakes need bleeding or a siezed caliper ?servo anyone

stevo48 · Dec 22nd, 2012, 21:56

When you say the braks failed do you mean the pedal went hard as in very hard to press?
If that was the case it is a common fault on the early s/v40's and it would appear the only cure is a new servo.

delboy62 · Dec 22nd, 2012, 22:01

HI
the pedal went straight down but i kept pumping and luckally they worked its phase 2 (2001

gmain1967 · Dec 22nd, 2012, 22:15

Quote:

Originally Posted by delboy62

HI
the pedal went straight down but i kept pumping and luckally they worked its phase 2 (2001

I'd check for leaks, change the fluid and bleed the system. Before I drove the car again...

stevo48 · Dec 22nd, 2012, 22:18

check the brake pipes inthe rear wheel arches (common muck collecting /corrosion point) if no obvious signs of leakage and fluid level is normal suspect master cylinder seal failed.

Clan · Dec 22nd, 2012, 22:20

Quote:

Originally Posted by delboy62

HI
the pedal went straight down but i kept pumping and luckally they worked its phase 2 (2001

possibly the master cylinder then , the secondary circuit comes in at about 50% travel so you should be able to stop . has the brake fluid been changed every 2 years ? It should be fairly clear with a yellow tint . does it still go down if you keep a gentle but constant pressure on the pedal ?

m1tch1987 · Dec 22nd, 2012, 22:22

Also check the pipes around the brake master assist cylinder, the hose might be leaking or indeed the brake assist diaphram meaning you don't have the most effective brakes - what car is it as if its a diesel it might be something to do with the vacuum pump.

Clan · Dec 22nd, 2012, 22:23

Quote:

Originally Posted by m1tch1987

Also check the pipes around the brake master assist cylinder, the hose might be leaking or indeed the brake assist diaphram meaning you don't have the most effective brakes - what car is it as if its a diesel it might be something to do with the vacuum pump.

if it is the vacuum pump the pedal will feel rock hard with no travel and you have to push 4 times harder , the diesel and auto petrols have a vacuum pump .

Dec 22nd, 2012, 21:24	#1
delboy62 Junior Member Last Online: Jul 26th, 2013 13:09 Join Date: Jul 2012 Location: telford	Brakes HI ALL Been out in car the last 2 times and on both times the brakes seem to fail for about 5/10 seconds , now could be brakes need bleeding or a siezed caliper ?servo anyone Last edited by delboy62; Dec 22nd, 2012 at 22:05.

Dec 22nd, 2012, 22:22	#7
m1tch1987 Premier Member Last Online: Dec 29th, 2013 12:08 Join Date: Apr 2011 Location: Berkhamsted	Also check the pipes around the brake master assist cylinder, the hose might be leaking or indeed the brake assist diaphram meaning you don't have the most effective brakes - what car is it as if its a diesel it might be something to do with the vacuum pump. __________________ 2003 Volvo V40 1.9D Sport - MPG below

Dec 22nd, 2012, 21:56	#2
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	When you say the braks failed do you mean the pedal went hard as in very hard to press? If that was the case it is a common fault on the early s/v40's and it would appear the only cure is a new servo.

Dec 22nd, 2012, 22:01	#3
delboy62 Junior Member Last Online: Jul 26th, 2013 13:09 Join Date: Jul 2012 Location: telford	HI the pedal went straight down but i kept pumping and luckally they worked its phase 2 (2001

Dec 22nd, 2012, 22:18	#5
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	check the brake pipes inthe rear wheel arches (common muck collecting /corrosion point) if no obvious signs of leakage and fluid level is normal suspect master cylinder seal failed.

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