Brake Troubles.....HELP!!!!

[thgrahamjr]

Ok, here is the situation; I bought a used hydraulic brake caliper off e-bay that came off a 82' 750 suzuki motorcycle. I modified the mounting brackets on my off-road kart to accomondate the bigger caliper, flushed the lines, hooked everything up, feeled the res. with brake fluid and bled the lines. Problem is that when I pump the brakes the piston moves but wont clamp the disc tight enough to slow or stop the kart. Here are some pics of the setup, any help or suggestions will be greatly appreciated.

 

[Kaptain Krunch]

It looks like there are no brake pads.

 

[thgrahamjr]

There are pads in it.

 

[Raywelder]

It looks like there are no brake pads.

Yea, looks like that to me too.
Whats that piece in the caliper between the right side and the rotor?

Also, make sure you have bled the caliper and everything.

 

[Raywelder]

There are pads in it.

Well in that case, Bleed the caliper and master.
There should be a bleeder screw on the caliper,
loosen it.
Pump your brake,
hold down the peddle,
Tighten the screw,
Let off the peddle,
Loosen the bleeder screw,
Pump again,


Just do that until you have solid fluid coming out.
And make sure your resevoir stays filled while doing this, so it dont suck in air, otherwise you will have to start all over.




And are you sure it has pads? Whats the big thing next to the rotor, attached to that rod? And It looks like the other side has nothing there.

 

[thgrahamjr]

That big thing is the mount and the pad is partly inside that and pushes out when the pedal is pushed. And again, yes it has pads... I did bleed it but not how you described so I will do it again the way you described and see if that helps. Thank you all for helping me!!!

 

[kibble]

What about the seals on the master cylinder? Are those in good shape?

 

[Raywelder]

That big thing is the mount and the pad is partly inside that and pushes out when the pedal is pushed. And again, yes it has pads... I did bleed it but not how you described so I will do it again the way you described and see if that helps. Thank you all for helping me!!!

How did you bleed it?

Lol, Those are some weird looking pads to me.
I see the pads now

 

[theo]

Make sure you have a hard pedal, if its soft you still have air in the system.

theo

 

[Kaptain Krunch]

It looks like only one side of the disc is touching the pad, and the other side is just touch the piston? maybe you could get some more close up pics.

 

[thgrahamjr]

What about the seals on the master cylinder? Are those in good shape?

How do I check the seals? It is not leaking and when I removed the caliper and pushed the piston in it moved back closed when I pumped the brake pedal.

 

[thgrahamjr]

How did you bleed it?

I loosened the bleeder valve and pumped it until a solid stream came out and then closed the bleeder valve.

 

[thgrahamjr]

Make sure you have a hard pedal, if its soft you still have air in the system.

theo

Well the pedal is soft for most of the stroke, the brakes some what work but I have to pull the hell out of the cylinder arm.

 

[Kaptain Krunch]

sounds like you didnt bleed them right. Open up the bleeder valve, push the pedal in all the way, tighten up bleed valve, release pedal. Repeat until you get brake fluid when you push the pedal in all the way, then tighten valve up while holding in pedal, then release pedal and it should be fine. Its probably a two man job.

 

[Raywelder]

sounds like you didnt bleed them right. Open up the bleeder valve, push the pedal in all the way, tighten up bleed valve, release pedal. Repeat until you get brake fluid when you push the pedal in all the way, then tighten valve up while holding in pedal, then release pedal and it should be fine. Its probably a two man job.

Yep, a little bit better described than mine.

I dont know if your doing this but, You dont want to open the valve and just keep pumping the pedal, you have to hold the pedal down while you tighten the screw. If you let it up before the screw is tightened, then it just sucks air back in.

You have it set up to push the arm into the master cylinder right?
It looks like you do, but Im just making sure.

 

[thgrahamjr]

It looks like only one side of the disc is touching the pad, and the other side is just touch the piston? maybe you could get some more close up pics.

Pic

 

[Raywelder]

Pic

Yea, I got to looking and seen those earlier, but thanks for clearing that up for us.

 

[thgrahamjr]

I dont know if your doing this but, You dont want to open the valve and just keep pumping the pedal, you have to hold the pedal down while you tighten the screw. If you let it up before the screw is tightened, then it just sucks air back in.

That was exactly how I did it.

You have it set up to push the arm into the master cylinder right? It looks like you do, but Im just making sure.

Yes it pushes the rod in when the brake pedal is pushed.

 

[thgrahamjr]

Yea, I got to looking and seen those earlier, but thanks for clearing that up for us.

Anytime...

 

[Raywelder]

Yes it pushes the rod in when the brake pedal is pushed.

Oh ok, I was pretty sure you did, But you mentioned that you were pulling on the arm, I figured you meant the arm that goes to the pedal, but it doesn't hurt to make sure.

Bleed it, and get back here!