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brake cylinder ..

 
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Malte
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Joined: 11 Dec 2007
Posts: 534
Location: Germany

PostPosted: Wed Dec 10, 2008 10:12 pm    Post subject: brake cylinder .. Reply with quote

i 'm just trying to renew my front brakes.

i cleaned everything, put the brake cylinders out, put the gasket rings out..

just wanted to put new ones in...but noticed that i forgot where to put it.

there are two different rings, one with rills, and one without.

which one is for which whole in the brake thing ( don't know the word ).

thanks in advance :)
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Punky
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Joined: 18 Jun 2007
Posts: 361
Location: Netherlands

PostPosted: Wed Dec 10, 2008 10:46 pm    Post subject: Reply with quote

From the site of Jeroen Cats:

Rebuilting front brakes, discs front

Take of all components that are in the way (heater hoses, air filter...)
With some pliers, push back and away from the discs, the springs holding the brake pads.
The brake pads should now almost fall out.
Move the pads around a bit for them to really come out.
If the pistons can't be moved back enough, put a screwdriver between the disc and the pad at the top of the caliper, be careful not to
If the pads are more then slightly uneven worn a piston is sticking.
Drain as much brake fluid as possible from the braking system.
Undo the brake line nipple (8mm) from the master cylinder to the caliper (caliper end).
Be sure not to bend or damage the brake line or nipple.
Undo the bolts (17mm) holding the calipers and remove the calipers.
Note which caliper half goes where and check for spacer plates fitted between gearbox and calipers!
At this point the discs can be changed.
Split the caliper into 2 halves.
Cover the hole connecting the 2 halves with a piece of inner tube.
Put the caliper half in the bench screw, covering the hole.
With compressed air or a spare master cylinder press the piston out of the caliper.
Catch the piston when it comes out with a large piece of cloth, especially with air it shoots out.
Inspect the outside of the piston.
It should be absolutely smooth. Small blemishes can be taken of with waterproof sanding paper.
When the piston is damaged, it has to be replaced.
Clean the piston.
Take the 2 rubber rings out of the caliper half with something pointy, avoid scratches.
Throw away the rubber rings, do not reuse them.
Clean the caliper (gasoline), blow through all oil ways with compressed air, and dry it out.
Inspect the caliper, if there is damage on the piston contact area, this has to be taken out with honing.
Make sure the grooves for the rings are clean as well.
The piston should smoothly slide in and out of the caliper.
Soak the new rubber rings in LHM oil.
The flat ring goes into the bottom groove (furthest from disc), the grooved ring in the top groove. Cover the outside of the piston with oil and press it in BY HAND.
Take care that the piston is kept straight or it won't go in.
The piston can be pressed down with the palm of your hand (with your weight on it).
Using some sort of press will result in broken calipers since the piston won't go in straight.
Do this for all 4 halves.
Clean the discs with brake cleaning spray and a clean cloth.
Refit the calipers with a new little ring in between the halves, don't forget the springs!.
Some calipers have spacers between caliper and gearbox.
After fitting the caliper check that the disc is positioned exactly in the middle of the caliper.
When not change position by fitting the spacer or filing a bit of the gearbox mountings.
If the calipers and gearbox haven't been changed they should position correctly without modifications.
Fit the brake pads (new ones).
The pads have one end with a T attached and one end with half a hole.
Put the T part between your fingers and point the other side upwards a bit.
Put in the pad so the half hole catches the pin on the caliper then move up the T end and slip the spring on the T end.
Wiggle the pad a bit to make sure it can't fall out.
Take the air out of the system, follow the COMPLETE procedure even if you haven't touched the rear brakes.

http://www.cats-citroen.net/home.html
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Malte
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Joined: 11 Dec 2007
Posts: 534
Location: Germany

PostPosted: Wed Dec 10, 2008 11:46 pm    Post subject: Reply with quote

thanks a lot :)

i've put the rings and the cylinders in.

2 of them go in a little more difficult when i push it down, i hope this is not a problem..

perhaps i've just digged out my own grave ?!
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