S40 Rear caliper woe

MDS40 · Feb 9th, 2020, 17:51

Decided to change the rear discs and pads as the disc looks original but okay.
The pads have many miles left on them but best to change them at the same time.

All went well until trying to remove the 2nd caliper carrier retaining bolt which i found was rounded off and would not shift.
Just cleaned up the caliper and lubed the slider pins which were dry and aborted the job

What i didn't see however was a mark to line up the piston after retracting it, which i didn't do as i left it as found.

Is there an alignment mark or are you supposed to set it to how you found it?

Edit I know it has to be retracted following disc/pad changes but what i mean is how to align in correctly to fit pins on the pad.
I have the rewind tools.

MDS40 · Feb 10th, 2020, 16:17

Bump: Anybody?

StatusRed · Feb 11th, 2020, 17:38

Quote:

Originally Posted by MDS40

Bump: Anybody?

Can't you just do it by eye? Use the caliper rewind tool to turn it visually to the correct position?

Petey80 · Feb 12th, 2020, 14:50

I'm pretty sure the holes on the caliper piston are only for the windback tool and not for the little nipples on the brake pads.

Last time I had mine to bits, they didn't line up together.

big yinn · Feb 13th, 2020, 20:10

The holes on the piston are just there for the piston retraction tool to grip the piston, they're not for locating the pads.

MDS40 · Feb 16th, 2020, 11:35

Thanks for the advise.

Have had another look at the new pads and the spacing of the pins on the piston pad and it would seem too wide to fit inside the piston holes, so i guess you just rewind it back.

My last car a Jag x type had to be aligned by an arrow on the caliper against the piston.
Just what are the reasons for putting these pins on the back of the pads?

Petey80 · Feb 16th, 2020, 15:14

From what I've found, the rear pads for our cars also fit other cars. So they maybe do line up on other cars.

nalla · May 6th, 2020, 10:29

These callipers are also fitted to some fords. I have just had the rear pads out on my c70 and the pad next to the piston has these little pins on them which lined up with the holes on the piston will fit in to.If they don't line up your back brake will bind

Feb 9th, 2020, 17:51	#1
MDS40 Senior Member Last Online: Apr 1st, 2024 17:55 Join Date: Sep 2017 Location: Berkshire	S40 Rear caliper woe Decided to change the rear discs and pads as the disc looks original but okay. The pads have many miles left on them but best to change them at the same time. All went well until trying to remove the 2nd caliper carrier retaining bolt which i found was rounded off and would not shift. Just cleaned up the caliper and lubed the slider pins which were dry and aborted the job What i didn't see however was a mark to line up the piston after retracting it, which i didn't do as i left it as found. Is there an alignment mark or are you supposed to set it to how you found it? Edit I know it has to be retracted following disc/pad changes but what i mean is how to align in correctly to fit pins on the pad. I have the rewind tools. __________________ 2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new. Last edited by MDS40; Feb 9th, 2020 at 18:17.

Feb 10th, 2020, 16:17	#2
MDS40 Senior Member Last Online: Apr 1st, 2024 17:55 Join Date: Sep 2017 Location: Berkshire	Bump: Anybody? __________________ 2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new.

Feb 12th, 2020, 14:50	#4
Petey80 Premier Member Last Online: Apr 14th, 2024 21:03 Join Date: Feb 2017 Location: North East, Teesside	I'm pretty sure the holes on the caliper piston are only for the windback tool and not for the little nipples on the brake pads. Last time I had mine to bits, they didn't line up together. __________________ Thread V40 T2 R-Design - https://www.volvoforums.org.uk/showt...56#post2901756 Thread V50 D2 R-Design - https://www.volvoforums.org.uk/showthread.php?t=264890 - CRASHED

Feb 16th, 2020, 11:35	#6
MDS40 Senior Member Last Online: Apr 1st, 2024 17:55 Join Date: Sep 2017 Location: Berkshire	Thanks for the advise. Have had another look at the new pads and the spacing of the pins on the piston pad and it would seem too wide to fit inside the piston holes, so i guess you just rewind it back. My last car a Jag x type had to be aligned by an arrow on the caliper against the piston. Just what are the reasons for putting these pins on the back of the pads? __________________ 2006 S40 2.4 SE Auto. Ruby Red. 83K Miles Some previous cars include: Jaguar x type: Mazda 6 : Mazda 626: Ford Sierra 2.0: Toyota Celica ST 1600 : Hillman Avenger: Triumph Spitfire: Oh and a Volvo 340 GL 1984 company car from new.

Feb 16th, 2020, 15:14	#7
Petey80 Premier Member Last Online: Apr 14th, 2024 21:03 Join Date: Feb 2017 Location: North East, Teesside	From what I've found, the rear pads for our cars also fit other cars. So they maybe do line up on other cars. __________________ Thread V40 T2 R-Design - https://www.volvoforums.org.uk/showt...56#post2901756 Thread V50 D2 R-Design - https://www.volvoforums.org.uk/showthread.php?t=264890 - CRASHED

Feb 13th, 2020, 20:10	#5
big yinn Junior Member Last Online: Aug 29th, 2023 23:29 Join Date: Oct 2019 Location: Ryde	The holes on the piston are just there for the piston retraction tool to grip the piston, they're not for locating the pads.

May 6th, 2020, 10:29	#8
nalla Junior Member Last Online: Sep 26th, 2020 08:39 Join Date: May 2013 Location: norwich	These callipers are also fitted to some fords. I have just had the rear pads out on my c70 and the pad next to the piston has these little pins on them which lined up with the holes on the piston will fit in to.If they don't line up your back brake will bind

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