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Brake Systems Help Needed


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#61 Ethel

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Posted 19 April 2024 - 01:07 PM

That does look like a good job

 

A little tip for anyone doing the same: With the lever rates involved a few mm can make a lot of difference, so figure out a pattern, or jig to put the hole back as close to original before you weld it up.

 

You could even drill a couple of small holes in the pedal crank to pin a guide on. Drill it through the clevis hole, then drill the new hole through that.



#62 stuart bowes

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Posted 19 April 2024 - 01:09 PM

that's a good point, I measured off the other one and figured well if anything being slightly high is better than being slightly low and it ended up just slightly above centre 



#63 stuart bowes

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Posted 19 April 2024 - 03:37 PM

just realise you probably meant 'distance outwards from the pivot point'...

I guess the closer it is to the pivot, the more strength you apply to the brake (pedal effort is easier) but you have to push it slightly further

conversely the further from the pivot, input effort is slightly reduced (pedal effort is harder) but you don't have to push it quite as far.. have I got that the right way around ..

I can't see 2-3mm or so making a huge deal of difference really but the main thing I suppose is you hit full braking before you hit the bulkhead

I'm assuming that in normal conditions there's a good inch or so gap between pedal and bulkhead at full pressing.. ?


Edited by stuart bowes, 19 April 2024 - 06:43 PM.


#64 mbolt998

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Posted 22 April 2024 - 12:07 PM

 

These tools are also super handy when working on the Brakes for things like Cylinder replacement as you can lock off the hose and swap out cylinders without making a huge mess.

 

You've also mentioned the Master Cylinder and Regulator. These maybe the issue but that you say you can get a solid pedal and that they are not leaking tends to make me think they are OK - that's not a guarantee though !

 

 

OK another update to this. I bled the brakes again, using a bit more pressure on the EZ bleed (20psi) and they're much more solid. There must have been still a bit of air in there. I then tried overdoing the front adjusters (basically locking the brakes) and the pedal was very high and firm. So I'm convinced there are no issues. Backed them off to a normal adjustment and went for a drive. Everything working beautifully and can heel and toe like a boss.



#65 stuart bowes

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Posted 22 April 2024 - 12:17 PM

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#66 Spider

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Posted 22 April 2024 - 06:17 PM

OK another update to this. I bled the brakes again, using a bit more pressure on the EZ bleed (20psi) and they're much more solid. There must have been still a bit of air in there. I then tried overdoing the front adjusters (basically locking the brakes) and the pedal was very high and firm. So I'm convinced there are no issues. Backed them off to a normal adjustment and went for a drive. Everything working beautifully and can heel and toe like a boss.

 

 

Good work :proud:

I actually find the Easy Bleed good for getting a dry system started in regards to bleeding, but to get all the air out not so good. I've found the old skool method of pumping the pedal with a hose and a jar on the other end a more reliable way of getting all the air out.

Pleased to hear you have a better result.
 



#67 mbolt998

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Posted 23 April 2024 - 06:34 AM

 

OK another update to this. I bled the brakes again, using a bit more pressure on the EZ bleed (20psi) and they're much more solid. There must have been still a bit of air in there. I then tried overdoing the front adjusters (basically locking the brakes) and the pedal was very high and firm. So I'm convinced there are no issues. Backed them off to a normal adjustment and went for a drive. Everything working beautifully and can heel and toe like a boss.

 

 

Good work :proud:

I actually find the Easy Bleed good for getting a dry system started in regards to bleeding, but to get all the air out not so good. I've found the old skool method of pumping the pedal with a hose and a jar on the other end a more reliable way of getting all the air out.

Pleased to hear you have a better result.
 

 

That's interesting about the old skool method. The way I have always found that the way that works the best is to build pressure, hold it, open the bleed screw, let the pedal drop to the floor and close it again. Repeat a few times. I think the higher pressure in the lines helps push the bubbles to the end. But on a completely dry system it's hard to get any pressure at all. I increased the pressure in the EZ a bit and also left it connected up while I looked for my spanners and bits of plastic tube so maybe that helped.






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