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Discussion Starter · #1 ·
Hi! I have had my pedla be soft and not grabbing as it should for some time. If pumped with engine idleing I can get it to the floor. Brakes ok and ABS engages.

I have replaced rotor and pads all round, both rear calipers, master cylinder bit still the same.

Anyone have any suggestions what to try next? I will check the brake booster check valve today and see that is only let air flow one way.

2.4l non turbo with automatic gearbox from 2002.
 

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When you replaced the master cylinder, did you bench bleed it? (don't ask how I know about this)
 

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Discussion Starter · #3 ·
I tried but dont think I was too successful at it, I assumed it would just bleed itself one way or another since I changed all the brake fluid afterwards through the calipers.

The issue is same as before master cylinder was replaced so if the bleeding was the issue i guess it would be changed somewhat after the master cylinder change :S
 

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Dumb question but no leaks visible? Any change in fluid level?


2002 V70XC, 2003 V40, 2004 S60, 2010 V70
 

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Discussion Starter · #5 ·
Nope no leaks and fluid level stays. Also all caliper retaining springs are correctly installed.
 

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Hi what did you use to bleed the system, did you change all of the fluid, and bleed the clutch, as it uses the same fluid,
if I was you I would use a pressure bleeder and do it again,
how many miles have you done on the new brakes
Dave
 

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If you 2-man method bleed by dumping fluid into the reservoir and pump the pedal while another one watches at each caliper, is bench bleeding still necessary for the M/C, as this method should in theory pump the fluid through everything including the M/C... Just curious...

Also for the OP, how is your booster pump? Also the pump solenoid up at the top of the motor just above the headlight on the drivers side is another thing to check, or maybe that's what you referred to as the booster check valve... I've had to replace mine, but only because it became so brittle, that the top cover to it popped off...
 

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If you 2-man method bleed by dumping fluid into the reservoir and pump the pedal while another one watches at each caliper, is bench bleeding still necessary for the M/C, as this method should in theory pump the fluid through everything including the M/C... Just curious...

Also for the OP, how is your booster pump? Also the pump solenoid up at the top of the motor just above the headlight on the drivers side is another thing to check, or maybe that's what you referred to as the booster check valve... I've had to replace mine, but only because it became so brittle, that the top cover to it popped off...
Yes, always bench bleed master cylinders. I had the pedal in my last Saab go to the floor because I didn't, and blew through a stop sign across a 55mph zone. A firefighter friend said that was one of the most dangerous intersections in the township
 

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Yes, always bench bleed master cylinders. I had the pedal in my last Saab go to the floor because I didn't, and blew through a stop sign across a 55mph zone. A firefighter friend said that was one of the most dangerous intersections in the township


Sent from my Huawei Mate 9 using Tapatalk
 

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This is how I bleed mine - see at the end of the video. Can do the same with the ABS unit, if needed https://www.youtube.com/watch?v=FcwYnG6Fg9I
Also, double check how the caliper spring is attached - the long steel thing that hooks on the caliper. This is a classic error -

Wrong install https://volvoforums.com/forum/attac...304785962-strange-brake-behavior-p1020566.jpg

Another wrong install - the spring must go under the caliper surface - thanks for others pointing this out https://photobucket.com/gallery/use...DovSU1HMDAxNzQtMjAxMTA0MTYtMTAzMi5qcGc=/?ref=
 

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Discussion Starter · #11 ·
Thanks everyone for your replys!!

I have an update as me and my dad spent a few hours in the garage. First we bench bled the master cylinder in the car by running tubes from the two outlets up in to the reservoar. I think quite abit of air came out but was hard to tell. After that we bled each corner in this order (with ignition on) left rear, right front, right rear, left front. Now stuff feels better and I will now allow for the new front rotors to bed in properly before I come to any more conclutions. Did come out some mini air bubbles from three calipers.

Replaced rear pads and rotors maybe 1000miles ago and front rotors was just replaced maybe 100miles ago, kept the pads since they were only lightly worn.
 

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Discussion Starter · #12 · (Edited)
This is how I bleed mine - see at the end of the video. Can do the same with the ABS unit, if needed https://www.youtube.com/watch?v=FcwYnG6Fg9I
Also, double check how the caliper spring is attached - the long steel thing that hooks on the caliper. This is a classic error -

Wrong install https://volvoforums.com/forum/attac...304785962-strange-brake-behavior-p1020566.jpg

Correct install https://photobucket.com/gallery/use...DovSU1HMDAxNzQtMjAxMTA0MTYtMTAzMi5qcGc=/?ref=
Are you sure the correct install is really correct, looks like the rear caliper and the long part or the spring clip is outside the caliper tabs?
https://imgshare.io/image/5IbRq
 

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I was going to say that the correct doesn't look correct...

Sent from my Huawei Mate 9 using Tapatalk
 

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Discussion Starter · #15 ·
My brakes still grab earlier when driving now after the bleed but if pumped with engine idleing pedal still can go very far 😞. How does your pedals feel if idleing and pumping and pushing the brake pedal?
 

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Discussion Starter · #18 ·
Is there anyone else who can describe their pedal feel? Maybe film it like i did at idle? This is my first volvo so nothing to compare too. :(
 

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Here’s mine. Hope this helps. I find both my S60 and my V70 to have more brake travel than my V40 or my newer P3 V70. I routinely get whiplash when I first break with my P3 because I’m used to the more sluggish response from my P2’s. They still brake fine just feel a bit more spongy.

https://youtu.be/cHjmLQoednU


2002 V70XC, 2003 V40, 2004 S60, 2010 V70
 

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Discussion Starter · #20 ·
Here’s mine. Hope this helps. I find both my S60 and my V70 to have more brake travel than my V40 or my newer P3 V70. I routinely get whiplash when I first break with my P3 because I’m used to the more sluggish response from my P2’s. They still brake fine just feel a bit more spongy.

https://youtu.be/cHjmLQoednU



2002 V70XC, 2003 V40, 2004 S60, 2010 V70
THANK YOU! Yours seems like mine so makes me feel abit better 🙂, mine brakes fine too. Never had a volvo before so not really know how they can feel.
 
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