Ok handbrake again new idea

[QNSPYDER]

Ok I would like to ask has anyone did a hydraulic handbrake with the lines going to the Calibration Module where the lines go from the foot brake then branch off from there. I could come straight down from the handbrake with a Y hose with straight in fittings. This would be a more positive hookup. Would this be a good idea. Would there be any CON'S in doing this. Besides the loss of the foot brake.

Thank you for any input

 

[QNSPYDER]

calibration module

Here is some pic's of the calibration module were all the brake lines meet

 

[retread]

Don't recall anybody who broke into the hydraulic lines for a hand brake, all I've seen use a slave cylinder or a cable to move the brake pedal.

john

 

[RShrimp]

Looks like a dual master cyl on the foot brake. You have to figure out what the module is expecting. (two ports with equal pressure???? maybe .....) or(2 ports with differet pressures ????? .... maybe)

Look at the exploded for the master cyl.
Are the front and rear chambers the same size?? This will give you a clue. If they are not the same size then they do not create the same pressure.

My other thought is that a hand lever master cyl is not going to move enough fluid for 2 ports.
Again, look at the exploded for the Master cyl. How big are the pistons and how far do they travel?? Times 2 as it is a dual piston (if it even is a dual piston.

Sounds like a great project but be safe and remember, nothing is as easy as it seems at first glance.opcorn:

 

[chris56]

..is it not easier to install a second pair of brakes on the front .. only for the hand-brake .. should also be cheaper ..?!?
chris

 

[Magic Man]

Unfortunatly just "tapping" into the lines an adding another master cylinder will not work.

Now here's the 'why" behind it........

In every master cylinder there is a "compensator port"

This is the tiny hole in rear of the pressure cylinder that both releases the pressure in the system after you release the brake, and also allows fluid to flow into the caliper bores as needed to "compensate" for the caliper pistons moving out further from brake pad wear as it occurs.

The initial small amount of master cylinder piston travel first closes this port. Only then after this port is closed will the system begin to build pressure.

This port until it is closed off by the piston movement essentially creates a "leak" in the system. Until the piston moves and closes this off, any pressure applied to the lines at any point in the system will come out that port until it is closed off. An example would be, like when you push the caliper pistons back when replacing the brake pads. The fluid then returns to the master cyclinder through this port.

Which means, that until you close off that port by stepping on the rear brake all you will be doing is pumping fluid from the new master cylinder into the old one and vice-versa.

So, although at first glance it might seem like an easy way to do this, unfortunatly this type of dual master cylinder into the same lines system won't work at all, and would actually render your orginal master cylinder useless too.

Now if you are talking about replacing one master cylinder for another (removing rear and installing a hand unit in it's place) then that will work providing the hand unit you use will displace the same amount of fluid in each stroke and not have too great a "grip pressure" (hand strength) being needed.

MM

 

[QNSPYDER]

handbrake

Here is a handbrake that was done with running lines to the foot brake and plugging off the foot master. Then joining the lines back to the dis module. He has said that it worked vary will. I thought that was running to much line and restricting the fluid to much. With going to the module I could take all the line off from the old master and bowl but wouldn't I would just seal the lines off. That way I save all the parts for down the road if needed

http://www.spyderlovers.com/forums/showthread.php?t=8153

 

[NancysToy]

So, although at first glance it might seem like an easy way to do this, unfortunatly this type of dual master cylinder into the same lines system won't work at all, and would actually render your orginal master cylinder useless too.

Now if you are talking about replacing one master cylinder for another (removing rear and installing a hand unit in it's place) then that will work providing the hand unit you use will displace the same amount of fluid in each stroke and not have too great a "grip pressure" (hand strength) being needed.

MM

:agree: That is precisely why the hydraulic conversions up to now have used a slave cylinder to operate from the hand lever and actuate the original master cylinder. Rule # 43. Nothing is as easy as it seems!

 

[Lamonster]

Here is a handbrake that was done with running lines to the foot brake and plugging off the foot master. Then joining the lines back to the dis module. He has said that it worked vary will. I thought that was running to much line and restricting the fluid to much. With going to the module I could take all the line off from the old master and bowl but wouldn't I would just seal the lines off. That way I save all the parts for down the road if needed

http://www.spyderlovers.com/forums/showthread.php?t=8153

No, look again. This is a slave that is independent of the braking system, he's not blocking off anything or tying into anything. It's a mechanical way of pushing down the pedal without messing with the complex braking system of the Spyder. Here's a kit that you can buy for that.
http://www.industrialspecialty.com/ISCI%20-%20Spyder%20Parts.htm#handbrakesystem

This is how it works.
http://www.spyderlovers.com/forums/showthread.php?t=11753

[ame]http://www.youtube.com/watch?v=0Bb04PPTazw[/ame]

 

[ISCI Billy]

Hand Brake Kit

ISCI has been manufacturing and selling this hand brake kit for 1 year. If anyone has any questios or would like additonal information I will be happy to help in any way I can. I currently have a few brakes in stock and we are building more as I type. We offer a 15% discount to those who are disabled everyday of the week for this item. Anyone on this thread that needs a brake that is not disabled and buys a hand brake today I will take $100.00 off the retail price. This is a quality product made in the USA. Ask anyone who has our brake system and I am sure they will tell you that it was worth the investment.

 

[madjack]

ISCI handbrake

I have the ISCI breke system insalled on my BH's spyder. with out a doubt, the quality of materials an workmanship is secound to none. The install, an the instructions, was a breese.
My only issue was the 4" risers that I already had put on, requirerd some extensive work-over with a die-grinder, to make the two fit together.
If I were looking to do the brake install from ISCI. I would seriously look at Kewlmetals new 3-way adjustable risers. not only will they fit much easier with the brake system. They also allow much more adjustibility, for individual position.

 

[Lamonster]

I have the ISCI breke system insalled on my BH's spyder. with out a doubt, the quality of materials an workmanship is secound to none. The install, an the instructions, was a breese.
My only issue was the 4" risers that I already had put on, requirerd some extensive work-over with a die-grinder, to make the two fit together.
If I were looking to do the brake install from ISCI. I would seriously look at Kewlmetals new 3-way adjustable risers. not only will they fit much easier with the brake system. They also allow much more adjustibility, for individual position.

I have the 4" risers and didn't have to do anything. :dontknow: How about a pic of what you had to do?

 

[madjack]

My wife being 5', I used the risers as more of a pull-back, not so much as a riser. Try laying the risers back with the ISCI system, resevior interfers.

Gene

 

[QNSPYDER]

Ya Lamonster I posted the wrong thread here is the right one

http://www.canamspyderforums.com/fo...plegic-spyder-ryder-wheelchairs-spyder-2.html

 

[LittleJohn]

Floto is the only one Ive seen actually tie into the hydraullic system.

 

[QNSPYDER]

Lamonster

hello Lamonster what handbrake master cylinder did you use on your bike looks like a gold wing. Plus what size line did you have to get for it (how long). You did do the paddle push with the slave cylinder.

 

[Lamonster]

hello Lamonster what handbrake master cylinder did you use on your bike looks like a gold wing. Plus what size line did you have to get for it (how long). You did do the paddle push with the slave cylinder.

I'm using the kit from ISCI
http://www.spyderlovers.com/forums/showthread.php?t=11753

 

[QNSPYDER]

Lamonster

Ya I thought of that right after I posted it that you had the ISCI setup