I need a hydraulic disc brake crash course lesson

bultaco4ever · Post by **bultaco4ever** » 06:22 pm Nov 04 2015

My '93 is now one month old to me. Today I buttoned up the rear suspension that was undersprung and neglected in the bearing department. I put some recommended new j ets and needle in. Did some back yard riding and it feels way better than my first ride on it did. This was my second. But, I am old school when it comes to brakes. Drums Ive got down. Disc binders are a mystery. Seems like I have to pull up on the rear lever to get them to release. How come?

6 Riders · Post by **6 Riders** » 07:30 pm Nov 04 2015

Bad master cylinder, brake caliper assembled wrong, brake pad pins worn out, spring missing from the brake lever.

bultaco4ever · Post by **bultaco4ever** » 07:35 pm Nov 04 2015

I have the spring

6 Riders · Post by **6 Riders** » 07:40 pm Nov 04 2015

Check the pins that hold the brake pads in. They are a wear item and need to be replaced occasional and are often ignored. If there are any wear marks, get a new set. If you need them, I recommend the Tusk replacements as they are not allen and don't strip nearly as easily.

bultaco4ever · Post by **bultaco4ever** » 07:42 am Nov 05 2015

Those pins are frozen to the caliper. Not going to be easy to remove.

Post by **Julien D** » 08:47 am Nov 05 2015

I had to replace a caliper because those pins broke when trying to remove and replace them. Tried drilling / easy out and just destroyed it.

bultaco4ever · Post by **bultaco4ever** » 09:58 am Nov 05 2015

I am a fast learner. I know a lot more about this now than yesterday. These pins may render this caliper useless. But, for now, I still have some usable brake pad left. I lubed up those pins the best I could and got the pads sliding a little better. Its usable for now. I guess that Im in the market for a caliper now. Anyone have one with those pins already removed?

6 Riders · Post by **6 Riders** » 11:32 am Nov 05 2015

I just picked one up, I'll check to see if the pins come out......after my nap.

KDXrider1989 · Post by **KDXrider1989** » 11:37 am Nov 05 2015

discs IMO are way better and simpler than drums. if you need advice on how to bleed them we can give you a few pointers

bultaco4ever · Post by **bultaco4ever** » 01:06 pm Nov 05 2015

I've bled brakes on some autos, trucks and vans. So, I used that experience to expel some of the old brake fluid and flush things out a bit. Then added some DOT 3. So, I've done some bleeding already on this bike. And, yes, I agree....discs stop better than drums do. At the speeds that I ride at I barely need either.

bultaco4ever · Post by **bultaco4ever** » 07:46 pm Nov 05 2015

So...speaking of these hanger pins that the pads slide on....Can the brake pads be removed without removing these pins? I couldn't seem to wiggle the pads loose for that.

6 Riders · Post by **6 Riders** » 07:51 pm Nov 05 2015

bultaco4ever wrote:So...speaking of these hanger pins that the pads slide on....Can the brake pads be removed without removing these pins? I couldn't seem to wiggle the pads loose for that.

,
No, the pins must come out.

6 Riders · Post by **6 Riders** » 04:30 pm Nov 06 2015

bultaco4ever wrote:I've bled brakes on some autos, trucks and vans. So, I used that experience to expel some of the old brake fluid and flush things out a bit. Then added some DOT 3. So, I've done some bleeding already on this bike. And, yes, I agree....discs stop better than drums do. At the speeds that I ride at I barely need either.

I got the pins out of this caliper. The caliper need to be rebuilt (it will work w/o the rebuild, but needs it) and new pad pins.
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