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XC90 '02–'15 General Forum for the P2-platform XC90 model

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help no brakes

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Old Feb 21st, 2019, 00:32   #1
osullivant
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Default help no brakes

Changed the rear calipers, bled the full system, changed the fluid, spongy pedal goes all the way to the floor...

I gather this could be the master cylinder... if so should I be able to see the leakage or can it leak internally... many many codes coming up...all todo with BCM and Anti skid etc///
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Old Feb 21st, 2019, 10:46   #2
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Check and double check that the caliper spring has been installed correctly.
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Old Feb 21st, 2019, 12:55   #3
osullivant
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Quote:
Originally Posted by cheshired5 View Post
Check and double check that the caliper spring has been installed correctly.
Will do.. not sure how this could lead to these symptoms,,?
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Old Feb 21st, 2019, 14:36   #4
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Originally Posted by osullivant View Post
not sure how this could lead to these symptoms,,?
An incorrectly fitted spring can reduce resistance in the caliper and allow excessive pedal travel.
Quite a common and often mentioned problem on here.
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Old Feb 21st, 2019, 23:35   #5
osullivant
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Springs all look fine.. swopped the master cylinder. Still not quiet right but much better... I'll bleed the 4 corners again tomorrow.
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Old Feb 22nd, 2019, 12:08   #6
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Some cars have a procedure to bleed the abs pump. Not sure if the XC90 does or not.
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Old Feb 23rd, 2019, 21:03   #7
osullivant
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Quote:
Originally Posted by owenfackrell View Post
Some cars have a procedure to bleed the abs pump. Not sure if the XC90 does or not.
spent many hours today looking at it and springs ... bleeding it again etc.... just discovered I have the calipers on the incorrect side so the bleeding nipples are at the bottom.... presumably pockets of air sitting up high in the calipers....

silly me....

All fixed....

Parking brake adjusted. NCT (MOT) tomorrow....

Last edited by osullivant; Feb 23rd, 2019 at 23:04.
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Old Feb 23rd, 2019, 21:40   #8
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Yes that would do it!
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Old Feb 24th, 2019, 18:41   #9
Harley Dave
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Gotta love that honesty!!

Well done for having the "cojones" to admit it.

Cheers

Dave
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