Troubleshooting inboard semi-hydrolic

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Davidsquaredson
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Tv175 original break and steel disk. I bought a new semi hydraulic back plate. Reservoir is behind the horn cast. I have a bleeding kit and pretty confident it's good.

Took anti rattle clip off. Holes in disk are 13/32. Copper grease on the 3 pegs. New oil seal for the speedo area. I cleaned the disk surface. Newfren sintered pads. Pads move free. First pad is 4mm proud of the inside lip.

Break pull is hard and I can get it to half way. this puts resistance on the disk but I can still push the scooter.

This can't be correct as I know others have good results. Is it the back pad needs to be moved more forward?

Or I should rebleed?

Tx
David



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carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200
hendy
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Can you pull the lever all the way back to the bar?
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HxPaul
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Davidsquaredson wrote: Tue Apr 09, 2019 1:55 am Tv175 original break and steel disk. I bought a new semi hydraulic back plate. Reservoir is behind the horn cast. I have a bleeding kit and pretty confident it's good.

Took anti rattle clip off. Holes in disk are 13/32. Copper grease on the 3 pegs. New oil seal for the speedo area. I cleaned the disk surface. Newfren sintered pads. Pads move free. First pad is 4mm proud of the inside lip.

Break pull is hard and I can get it to half way. this puts resistance on the disk but I can still push the scooter.

This can't be correct as I know others have good results. Is it the back pad needs to be moved more forward?

Or I should rebleed?

Tx
David



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Have you tried the brake on the road,maybe the pads just need bedding in.
hendy
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HxPaul wrote: Tue Apr 09, 2019 8:30 am
Have you tried the brake on the road,maybe the pads just need bedding in.
The disc brakes on my pedal bike were appalling when I first got it. My last 3 have had discs and the previous 2 were good from the start. I spoke to the shop who advised bedding in by hard braking without coming to a stop..it made an astonishing difference.

I know it's not a bicycle but the principle applies.
Davidsquaredson
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Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
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Tx, I learned something new today. I was not aware of the bedding in. I have scootrs and SSC disks on other lammies and they gripped like a fat lady on a cheeseburger from the start.

I will also tighen the stationary pad a bit and then try it out.

I've got the cable on the MC setup such that full pull is achieved when handle lever is 1/2 way.

I also did the trick of holding the lever on with rubber bands for 24hrs which allows any remaining air bubbles to move up to the top of the MC.

David

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carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200
hendy
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Posts: 859
Joined: Mon Jul 07, 2014 10:34 am
Main scooter: lambretta li 125
Location: Tyne and Wear
Contact:

If you can't pull it more than half way, then it doesn't need bleeding.
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