Abarthisti

Tuning & Modifications => DIY/How To section. => Topic started by: Trooper on July 03, 2012, 03:22:08 pm

Title: HOW TO: Change rear brake pads
Post by: Trooper on July 03, 2012, 03:22:08 pm
A common niggle with the A500 is squealing rear brakes, most owners will get this problem sorted under warranty usually they just require a strip and clean, sometimes though
the problem can be worn pads due to sticky/dirty callipers.

For those of you who want to upgrade/change the pads heres a quick guide on how iI did mine  :thumb:

IMPORTANT If you have never changed your own brake pads before, or your unsure about anything that follows in the guide below seriously consider
getting them replaced by a professional, Remember brakes shouldn't be messed with unless your sure about the task you are undertaking!!!

Tools you will need from top L to R

(http://i76.photobucket.com/albums/j32/alfa4eva/036-3.jpg)

Axle stands
Trolley jack
17mm Wheel wrench
Lock nut key
17mm spanner
13mm socket/ratchet
Extension bar
calliper rewind tool
Flat blade screwdriver
Copper slip
Brake cleaner
Gloves

Dont forget your new pads  ;) and always wise to wear gloves.

 
For safety complete this task on level ground then chock the front wheels.

Slacken wheel nuts then lift the rear using the jack, I lifted at the bottom of the trailing arm.

(http://i76.photobucket.com/albums/j32/alfa4eva/002-10.jpg)

Insert your axle stand somewhere secure then remove jack,

(http://i76.photobucket.com/albums/j32/alfa4eva/004-11.jpg)

Complete this again for the other side, and remove wheels, always wise to check tread for depth and damage while removed.

(http://i76.photobucket.com/albums/j32/alfa4eva/005-9.jpg)

Release the handbrake completely

(http://i76.photobucket.com/albums/j32/alfa4eva/006-10.jpg)

Remove brake fluid cap.

(http://i76.photobucket.com/albums/j32/alfa4eva/007-8.jpg)

Place kitchen towel around open cap to catch any fluid.

(http://i76.photobucket.com/albums/j32/alfa4eva/008-8.jpg)

Heres what the rear brakes look like.

(http://i76.photobucket.com/albums/j32/alfa4eva/010-6.jpg)

(http://i76.photobucket.com/albums/j32/alfa4eva/012-4.jpg)

Use the 10mm socket/ratchet to remove the slider bolts using the 17mm spanner to hold them secure.

(http://i76.photobucket.com/albums/j32/alfa4eva/014-5.jpg)

(http://i76.photobucket.com/albums/j32/alfa4eva/015-6.jpg)

Remove the two slider bolts.

(http://i76.photobucket.com/albums/j32/alfa4eva/016-4.jpg)

Piston is now free to be removed from the carrier.

(http://i76.photobucket.com/albums/j32/alfa4eva/017-4.jpg)

Leaving the pads exposed in the carrier.

(http://i76.photobucket.com/albums/j32/alfa4eva/018-4.jpg)

Pull out the pads from the carrier.

(http://i76.photobucket.com/albums/j32/alfa4eva/019-5.jpg)

(http://i76.photobucket.com/albums/j32/alfa4eva/020-4.jpg)

(http://i76.photobucket.com/albums/j32/alfa4eva/021-3.jpg)

Now the pads have been removed check them against your new ones to ensure they are the same fitment.
Also note on the pic how little these pads have worn.

(http://i76.photobucket.com/albums/j32/alfa4eva/023-3.jpg)

Now is a good time to clean the brake assembly, I used a general degreaser nothing too strong.

(http://i76.photobucket.com/albums/j32/alfa4eva/026-3.jpg)

OK its always worth checking to see if the slider pins are well lubricated
Get a flat blade screwdriver at the end of the rubber gaiter, taking care not to damage it, separate it from the end of the slider pin

(http://i76.photobucket.com/albums/j32/alfa4eva/027-3.jpg)

Pull out the slider pin from the carrier, as you can see this one is fine with lots of lube still on it.

(http://i76.photobucket.com/albums/j32/alfa4eva/028-2.jpg)

Replace pin, slide it home, and rubber gaiter will pop back into place.

Now its time to rewind the piston.
Get the ratchet,extension and rewind tool and place on the end of the piston

(http://i76.photobucket.com/albums/j32/alfa4eva/031-2.jpg)

My pistons wound back in clockwise WARNING not all A500 callipers wind in this way, some may wind in a Anti clockwise position
even on the same car so TAKE CARE and check before you completely wind out the piston by accident!!!

So the piston is now wound in time to fit the new pads.

I always clean off the new pads with brake cleaner (some people dont) then dry and dab a little copperslip to the rear face.

(http://i76.photobucket.com/albums/j32/alfa4eva/029-2.jpg)

slip pads back into carrier

(http://i76.photobucket.com/albums/j32/alfa4eva/030-2.jpg)

The place piston assembly back onto the carrier and refit slider bolts

(http://i76.photobucket.com/albums/j32/alfa4eva/010-6.jpg)

(http://i76.photobucket.com/albums/j32/alfa4eva/014-5.jpg)

Thats one side done now repeat for the other side!

Look at the pads from the other side, see how worn these are, its fairly common problem on 500 to get one side wearing more quickly
These were changed just in time  ;)

(http://i76.photobucket.com/albums/j32/alfa4eva/034-3.jpg)

Ok so assuming you have complete the pad change on both sides and everything is reassembled
the next step is to adjust the handbrake, do this by pulling up on the handbrake a few times until
the mechanism self adjusts and feels secure.

(http://i76.photobucket.com/albums/j32/alfa4eva/035-3.jpg)

Replace brake fluid cap.

(http://i76.photobucket.com/albums/j32/alfa4eva/007-8.jpg)

And refit wheels and remove axle stands

(http://i76.photobucket.com/albums/j32/alfa4eva/004-11.jpg)

Dont forget to tighten your wheel nuts once the car is back on the ground.

And thats it  :) Took me less than an hour and that with taking pics  ;D

I always go for a very short low speed ride around the block after working on the brakes, just to give them a try
And remember to try the hand brake out before leaving your car on a slope unattended  ;D

 





 







Title: Re: HOW TO: Change rear brake pads
Post by: corsa on July 03, 2012, 04:10:01 pm
Great write up again :thumb:
Surely useful!
Title: Re: HOW TO: Change rear brake pads
Post by: On and on on July 03, 2012, 05:11:27 pm
 :thumb:Good write up.
One thing I'd like to add if I may.

Once the car is back on the ground, start the engine and give the brake pedal a couple of pushes to settle everything.

Title: Re: HOW TO: Change rear brake pads
Post by: Ricey155 on July 03, 2012, 05:16:13 pm
 :thumb: top write up

dead easy job both front and back and bleeding brakes

keep them coming  :thumb:

any chance you can pop around mine and do one for changing the oil ??  :whistle: ive had the oil over 4 months just need to get dirty doing it  :o
Title: Re: HOW TO: Change rear brake pads
Post by: ESPER500 on July 03, 2012, 05:27:52 pm
Absolutely brilliant write up Trooper  :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: Yordan on July 03, 2012, 05:51:33 pm
Good work again!  :thumb:

We need a trooper section.  ;D
Title: Re: HOW TO: Change rear brake pads
Post by: ESPER500 on July 03, 2012, 05:52:47 pm

We need a trooper section.  ;D

+1
Title: Re: HOW TO: Change rear brake pads
Post by: Hippo on July 03, 2012, 06:13:47 pm
That's good one. Never been confident enough to do that.
Title: Re: HOW TO: Change rear brake pads
Post by: Gordonm on July 03, 2012, 06:33:22 pm
Excellent Tooper......just wish I had the BOTTLE to place any kind of tool (pardon the expression) in my hands.
Thanks GordonM
Title: Re: HOW TO: Change rear brake pads
Post by: Dan on July 03, 2012, 07:23:30 pm
again thank you trooper! invaluable knowledge

I feel awful that I and others have not written anything up yet, my excuse is I have no tools what so ever! :'(

You appear to have an Aladdin's cave how long has it took you to collect all your bits and bobs?
Title: Re: HOW TO: Change rear brake pads
Post by: tonyspurs on July 05, 2012, 05:55:35 pm
Brilliant! Cheers Troop :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: dixy on July 06, 2012, 12:11:07 am
Cracking write up, I'd give that a Go now ;-) good work :-)
Title: Re: HOW TO: Change rear brake pads
Post by: the_cueball on July 10, 2012, 10:58:33 am
Nice guide.... cheers

 :thumb: :thumb: :thumb: :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: Macfie on July 10, 2012, 11:40:01 am
Very good information Trooper,simple step by step work.If you have anymore straight forward jobs that you could cover in a similar manner I am sure Abarthisti would welcome them. :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: Caz360 on July 11, 2012, 05:55:25 pm
thanks for that, good work! :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: Nibor on September 20, 2012, 08:00:08 pm
Do a write up for replacing the disks too  :whistle:

I feel confident I could replace the pads quite easily following your guide, my brothers done it before on his old Focus and I helped out with that, so already had a rough idea on how to do this, but a very simple guide indeed, I'd need to get a rewind tool first, as ours has mysteriously vanished over the years

I'm needing to replace my rear disks and pads, fronts have a good bit left in both pads and disks but was considering swapping to the TMC kit thats on par with the esseesse kit, although selling on would mean non esseesse disks which could depreciate value, but I'm sure I'll have my car long enough to go through another set of disks and pads  :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: scuderia sitar on October 23, 2012, 08:13:21 am
Tried changing my pads at the weekend, but the thickness of pads and disc wouldn't fit in the caliper.  I wound the piston in as far as it would go, but there just wasn't the space to fit the caliper back on.  The new pads are 13mm, but all of the pads I've seen seem to be that thickness, so I must be doing something wrong, but don't know what.  I put the old pads back on OK and they have about 5mm on them.   Anyone else had this problem?  I found the brake pipe was quite short, so there wasn't enough play to fit the caliper straight on, it had to be squeezed on at an angle.  Even if it could go straight, it still wouldn't have fitted over the pads and disc.
Any idea what I'm doing wrong?
Title: Re: HOW TO: Change rear brake pads
Post by: lloyd on October 23, 2012, 10:06:04 am
theres a little blob of metal on the back of the pad, this has to locate in the cutout of the piston. make sure the piston is turned so that the cutouts are at "quarter to three" the whole lot will then fit together :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: Delaney on October 24, 2012, 05:01:06 pm
Scuderia

I did this exact job yesterday (one quick point it is a 13mm socket/ratchet that is required for the slider bolts) and if you have got the pads up against the disc when you put the sliding half of the caliper there is space with the piston wound all the way in. The pads can be a bit akward to push in the guide groves but they must be right up against the disc when trying to fit the caliper back on. You will some times think that you have it all square so to speak but you will normally find out when you try and put the second slider bolt back in that it wont go in just wriggle the calper around a bit and it will eventually seat correctly.

The other question is have you wound the piston all the way in it should have the gone all the way in don't worry it can never go to far it is a machined seat so you should have the rubber seal actually sticking out above the face of the piston which has a raised cross face upon which copperease should be liberally covered with.

The pads vary a bit from manufacture to manufacture but the Lucas designed pad depth is 13.7mm so it sounds as though the depth of the pad is not an issue.
Title: Re: HOW TO: Change rear brake pads
Post by: Nibor on October 25, 2012, 01:56:31 am
Also, for people that dont have a brake rewind tool, you can use any kind of clamp thats big enough, I used a silicone tube gun, without the silicone, and it pushed the piston down easy enough  :whistle:

Failing that you can try and use brute force to push the piston back, this can work but its an absolute ba*tard to do it, normally you need to put something like a bit of wood across and pull it towards you, previous experience can tell you that this involved a lot of swearing and grunting, but can work if you've no other option and got all the way to the reassembly stage without realizing you had no clamp or brake rewind tool.

And also, for people thinking of changing rear disks at the same time, you need to remove the whole hub mount, so probably better having a garage do it because theres a lot more work involved to get the whole caliper removed from the disk, all because the allen key bolt at the top is innaccessible without removing the hub... Which has 4 annoying bolts that arent especially easy to reach, so yeah, rear disks is more likely a garage job unless you're up for the hassle it was for me, took about 3 hours for me to get the disks changed, mainly because of how long it took to figure out how to remove it in the first place. Front disks should be easy enough though
Title: Re: HOW TO: Change rear brake pads
Post by: scuderia sitar on October 25, 2012, 09:59:00 am
Thanks for all the help and advice guys.
I thought I had wound the piston in as far as it would go, but perhaps not, as it was still sticking out beyond the rubber seal after I'd wound it in.  I'll give it another go and let you know how I get on.  One question though, does it need to be wound, or can it just be pushed/levered back?
Also discovered the slider bolts are 13mm, not 10mm.
Title: Re: HOW TO: Change rear brake pads
Post by: lloyd on October 25, 2012, 11:18:55 am
the fronts will just  push in but i've found the rears need to be turned as you push :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: pete_88 on October 26, 2012, 12:24:11 pm
Good effort, although i just paid my local Italian specialists independent £45 and they supplied and fitted some new rear pads!  :thumb:
Title: Re: HOW TO: Change rear brake pads
Post by: LeCreme on August 15, 2013, 06:10:57 pm
Just followed guide thank you. Didn't replace with new pads though, just stripped and cleaned everything up for now. Will probably look at new back discs and pads (and maybe front) come end of the month.
Title: Re: HOW TO: Change rear brake pads
Post by: Ricey155 on January 04, 2015, 11:40:50 am
Need to sort my rears out

Where did you get the caliper wind in tool from ? And how much are they ? Cheers

Title: Re: HOW TO: Change rear brake pads
Post by: Ricey155 on January 04, 2015, 12:11:25 pm
Is it ???

Laser caliper rewind cube 5541 by any chance ?  :thumb:

Always buy the right tool before you start any job  ;D
Title: Re: HOW TO: Change rear brake pads
Post by: R34 on January 05, 2015, 08:03:19 am
Can get the rewind tool off amazon or ebay
Or any good auto shop  :thumb:
And must say thank you for taking the time to do the Wright up
With pics I must pull my finger out and take pics next time I do a job on car
Title: Re: HOW TO: Change rear brake pads
Post by: Ricey155 on January 05, 2015, 10:58:14 am
No issue where to get the tool just making sure its the same ITEM !!!!

I've ordered it anyhows it looks the same, half by rear pad has just vanished on the drivers side very weird !
Tool £5.95 off eBaY free post bargain (another item for the tool shed)

 :thumb:
Can get the rewind tool off amazon or ebay
Or any good auto shop  :thumb:
And must say thank you for taking the time to do the Wright up
With pics I must pull my finger out and take pics next time I do a job on car
Title: Re: HOW TO: Change rear brake pads
Post by: JapspeedUK on March 02, 2020, 03:28:37 pm
a quick one for when things go wrong lol!!

So i'm doing pads and discs, crappy job as more involved Inc removing entire hub, but I'm at the point of my slider pins, one is stuck firm and will not come out just spins, I've beat it to death and not shifting, sure I've an issue as inside disc face is a mess, so trying to free it all up, any advice other than buy a new caliper??