Done with band brakes need alternative

[Isaac123514]

I've done this for the second time with my band brake setup (see photo). I have tried again and again and again to align it but it will never stay aligned. I think my kart is too heavy and fast for a 4" band brake and drum. Has anyone done a drum break conversion on there yerf dog 30033? I'm running stage 1 mods on a ungoverned 212cc. this kart will do 45 mph

https://s15.postimg.org/ml0xhf2az/20161107_131416.jpg

 

[mckutzy]

Normally there is wings on the drum or on the band to avoid derailing like that.....

As for a brake kit or parts..... I cant really suggest a place as you dont have your location listed....
Mechanical and hydraulic disc work great for these buggies.

 

[Isaac123514]

I have looked at kits for disc and drum breaks but could only find 6" drums/discs in 1" bore. 6" is to big. I would also have a problem mounting the caliper if I went with the disc option.


Thanks Isaac

 

[mckutzy]

Let see some pics of your ride..
Useally have to weld on the bracket...

 

[Isaac123514]

Been busy lately. I took the drum off the axle which took a lot of banging and pb blaster. Here's the photo of where the brake would go.


https://s21.postimg.org/esh2b7sbr/20161110_150815.jpg

Thanks
Isaac

 

[pRoFiT]

6" disc too big? how big is your sprocket? should be enough clearance. but maybe your running small tires? cant really tell no pics of entire cart.

a quick cheap way could be this setup http://www.ebay.com/itm/HEAVY-DUTY-...-ROTOR-Caliper-Mounting-Bracket-/161863546859

Like mckutzy said you will need to weld the bracket. And probably need to modify the brake rod/cable.

p.s. if you click Go Advanced and then Manage Attachments you can post images to the thread. makes it easy for everyone to view. They will show up as smaller clickable thumbnails. (not sure what you click if using that third party phone app)

edit: here ill help on the first two images.

 

[Isaac123514]

I'm worried about it not fitting underneath the axle bracket where the drum break used to be (see circled area in photo). The brake was no where near the sprocket. I think it looked like that because of the way the photo was taken. Thanks for the tip on posting images! Im not sure whether that disc and caliper would stay in alignment based on how much abuse this kart gets.

Thanks Isaac

 

[mckutzy]

It would be a typical arrangement. Alignment will be fine, provided it was set up correctly when you welded the bracket onto the frame.
Bigger question is weather or not the disc chosen will fit in the space provided, ie. its OD isnt too big to fit....

 

[Isaac123514]

I think 6 " OD will exceed the height of where I can mount my bracket. I guess I could weld a piece of metal to jack the bracket up to the right place but that seems like a good place for it to break. The kit you linked looks like the caliper has to be welded under something and hover over the disc instead of from the side(if that makes any sense ). There is Definitely not enough room for that. Might just have to go without brakes!

 

[mckutzy]

If you get the disc set linked above...In this pic posted above, youll have plenty of room to put the caliper bracket on either side of the bearing hanger.....

 

[OzFab]

Mounting the brake disc close to the carrier allows for more caliper mounting options & doesn't impede ground clearance too much...

 

[Isaac123514]

Ok thanks IS there anyone here who has done this and would share some pictures?
Isaac

 

[Hellion]

Other brake systems have means of keeping the brake disc/drum and the braking material aligned properly, but many brake bands do not have the 'ears' or keepers added.

One issue is your brake drum is 'out of true' (uneven wear pattern) which will cause the band to 'walk off' the drum when it is applied.

Yet again, the brake rod or cable has to have a straight pull on the band and ultimately the drum, with no bias left or right. It shouldn't deviate from the centerline, otherwise pulling force applied from any other angle has the tendency to pull the band off the drum.

A lot of us use band brakes with little or no issue. They're cheap and surprisingly effective providing that they are set up properly.

 

[Isaac123514]

I have removed the band brake drum and it was stuck on tight so It took a lot of hammering. Its pretty destroyed so I would need a new one. I've never seen drums with keepers but I have seen bands with them but they wherent in the right size for my drum. The problem I always had with my old band was that it would bolt onto the axle hanger via a carriage bolt. The force of the brake band bring pulled caused the carriage bolt to loosen and bend or disform the axle hanger throwing the band out of alignment.

Isaac

 

[mckutzy]

That there was the single most problem... Its supposed to be a rod welded onto the chassis, and that will suffice the torquing of the band during a depression of the brake...

A bolt has threads, a now weakened rod to bend at a moments notice, during a critical moment.

I guess I should have asked earlier in the first place....a simple upgrade/tweak to existing setup.

With that being said... it wouldnt be much to install a new band brake, if that is an easier route then the disc conversion.....

 

[Isaac123514]

So your saying weld on a metal rod in place of the carriage bolt? What would hold the band on the rod? That sounds a whole lot simpler than a disc brake conversion.

Thanks
Isaac

 

[mckutzy]

That's how typically it is...
As per KartFab....

 

[Hellion]

Chancer has a band brake on one or more karts in his collection, and can lock up the rear wheels at will.

'Nuff said.

 

[chancer]

Yes 2 simple Yard Karts. Both will lock em up!
I have been reading this thread, but you are getting all the good answers without my 2 cents.

 

[KartFab]

Not to throw a wrench into anything (I agree about the brake band fix being easy, but I did a mechanical disc conversion on my Yerf dog a few years ago. Was like my fist post on the board.


http://www.diygokarts.com/vb/showthread.php?t=20718