Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required!

Honest John Back Room » Technical matters
What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
View Threaded
Wed 31 Dec 2014 15:29
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - mbounds86

I recently changed the driveshafts on my R-reg 106, and found upon driving the car for the first time that the front right brake was binding heavily, with the inner (acting) pad pressed against the disc. The old driveshafts were knackered and had lost their 'spring', so I think the new ones are acting on the hub a bit more.

The car hasn't been used much recently, although before the driveshafts were changed there was no sign of a problem from the brakes.

Since then I've tried numerous things to find the cause, but the issue has not gone away:

- Inspection of the caliper showed a worn gaiter and air in the system, so new caliper and flexi-hose fitted; caliper and pads move freely as intended

- System bled and no air present in system

- Pedal to servo bar adjusted to give some slack

The pad can be pushed back to free up the disc, but when operating the brake the piston doesn't recede sufficiently and still leaves the pad clamped on the disc. My next guess would be the master cylinder is faulty, but just wondering if anybody has had a similar problem or can give any advice before I have a look at that?

Any help would be greatly appreciated!

Reply | Report as offensive | Link
Wed 31 Dec 2014 17:07
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - chris.o
Mbounds86
Hi when you say the driveshafts lost there "spring" can you explain?
Just making sure I understand what bits have been changed.
Did you use a press to remove the driveshafts from the hubs?
I once unintentionally bent one of the caliper carrier mounts on a hub whilst mounted in a press, this caused the caliper to not push square. Binding the pad up.
Hope that makes sense?
Chris
Reply | Report as offensive | Link
Wed 31 Dec 2014 20:08
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - mbounds86

Hi Chris,

I removed the driveshafts by uncoupling the lower arm from the hub via the ball joint and pulling the strut away slightly, giving enough room to pull the driveshaft out from the gearbox. The mounts for the caliper are on the strut so this shouldn't have been affected.

The drivehsaft I put in was slightly longer than the one I removed, but had some compression in the new CV joints (2 of them), unlike the original which was spent and had to be tensioned to match the new length. So I think the new drivehsaft would act outwards on the hub/strut, although I'm not sure if this would have an effect on the caliper/pads or not.

I'm a bit confused as to why there was no brake binding before I replaced the driveshaft on the offside; there is no problem on the nearside replacement and the brakes work as before. It seems to me that something has been 'disturbed' by the new geometries, but I'm stumped as to what the issue is as I've replaced the caliper & hose and bled the system!

Thanks for your reply and happy new year!

Martin

Reply | Report as offensive | Link
Thu 1 Jan 2015 11:59
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - chris.o
Hi Martin
So the new driveshaft was complete? Inner joint (gearbox end) bar shaft and outer joint (hub/wheel bearing end).
Just thinking if the part of the driveshaft that went into the hub (through the wheel bearing usually splined) was too long, could that change the position of the disc? Offsetting it slightly, causing the problem.
Do you have a vernier caliper? You might be able to compare some dimensions from the other side?
Think we need to be careful if you've fitted a longer driveshaft, I'm not sure there's much spare plunge in the joints. Might cause problems when the suspensions under full droop or bump?

Chris.
Reply | Report as offensive | Link
Fri 2 Jan 2015 07:37
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - mfarrow
Might cause problems when the suspensions under full droop or bump? Chris.

Like bending something, or pushing the hub out the bearing slightly, and therefore the disc away from the hub carrier & caliper?

To eliminate master cylinder you need to open the bleed nipple on the back of the caliper. If this releases the brake you know it's a master cylinder issue.

Reply | Report as offensive | Link
Fri 2 Jan 2015 10:36
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - mbounds86

Hi guys,

Yes, new driveshaft came complete. It's from Euro car parts and is the specified shaft for my car.

I agree with you Chris that it may be causing the disc to offset - I will check this and make sure.

Mfarrow - thanks, I will check this too. It seems to me that if this was a master cylinder issue that the problem would've been apparent before.

I'll update after trying the above.

Cheers.

Reply | Report as offensive | Link
Sun 4 Jan 2015 16:41
Peugeot 106 1.4 XR - 1997 - Front RHS brake binding - help required! - mbounds86

Hi guys,

Bit more investigation has revealed that the wheel bearing is shot; additionally, the old driveshaft was intended for a MkI 106, which has a different profile to fit into the hub! Taking the driveshaft out makes the problem go away, so I think a knackered bearing is being pushed out by a new driveshaft - next step is to get the bearing replaced.

Thanks for the help

Martin

Reply | Report as offensive | Link