Cafe Racer Forum banner

1 - 19 of 19 Posts

·
Registered
Joined
·
23 Posts
Discussion Starter #1
So last night i decided to pull the rear wheel off to inspect it loose sprocket. To my surprise i found that 2 out of the 4 bolts had snapped off... Awesome!
I go to pull everything off and once i get to trying to pull the sprocket it seems it wont come off. The OD of the snap ring part if bigger than the Sprockets ID. Do i grind down the lip on the hub?

Pics...

https://drive.google.com/drive/folders/0B8C-WSdclRaHOWJTZFk1LVExUFk?usp=sharing
 

·
Registered
Joined
·
10,602 Posts
you were looking for photobucket links......
 

·
Registered
Joined
·
10,602 Posts
No one is dealing with some bullshit google link with a sign in to look at your pictures.

Have you looked in the MANUAL for the answers?
 

·
Registered
Joined
·
23,303 Posts
you shouldn't need to grind anything to remove a sprocket.

What are you trying to remove? the sprocket from the sprocket carrier? or the sprocket carrier from the hub?

Time and pressure tends to fuse this crap all together. A good solid pry bar usually works the treat.

If you have broken sprocket studs, you have bigger problems than not being able to get the sprocket off.
 

·
Registered
Joined
·
23 Posts
Discussion Starter #6
you shouldn't need to grind anything to remove a sprocket.

What are you trying to remove? the sprocket from the sprocket carrier? or the sprocket carrier from the hub?

Time and pressure tends to fuse this crap all together. A good solid pry bar usually works the treat.

If you have broken sprocket studs, you have bigger problems than not being able to get the sprocket off.
Im just trying to remove the sprocket and can't .

 

·
Registered
Joined
·
23 Posts
Discussion Starter #7
No one is dealing with some bullshit google link with a sign in to look at your pictures.

Have you looked in the MANUAL for the answers?
Yeah, I get it.. posted a vid to help shed light into my problem

ALso, yeah, I looked into a exploded view of the rear and it seems nothing indicates it being harder than it actually is.

So not really sure what i am missing here. I removed the bearings, Caps, C CLips, Only thing left is the Hub and Sprocket.
 

·
Registered
Joined
·
23,303 Posts
Pry Bar. PB Blaster (or Liquid Wrench). Rubber Mallet. propane torch. Work at it slowly. SLOWLY.

Heat the sprocket with the propane torch. Not so it is glowing hot, just get it a little hot.

Soak the joint between the sprocket and carrier with liquid wrench. Give it a few minutes to soak in

Hit the face of the sprocket with the rubber mallet a few times where it meets the carrier. DO NOT hit it near the edge where the teeth are unless you want to bend it.

If that doesn't work, get a long pry bar and put the carrier and sprocket on the ground. Put one of the pry bar on the ground and make sure the shaft of the pry bar goes against the backside face of the sprocket. Start to pry up. you may have to stand on the wheel or the carrier to hold it down.
 

·
Registered
Joined
·
23 Posts
Discussion Starter #9 (Edited)
Pry Bar. PB Blaster (or Liquid Wrench). Rubber Mallet. propane torch. Work at it slowly. SLOWLY.

Heat the sprocket with the propane torch. Not so it is glowing hot, just get it a little hot.

Soak the joint between the sprocket and carrier with liquid wrench. Give it a few minutes to soak in

Hit the face of the sprocket with the rubber mallet a few times where it meets the carrier. DO NOT hit it near the edge where the teeth are unless you want to bend it.

If that doesn't work, get a long pry bar and put the carrier and sprocket on the ground. Put one of the pry bar on the ground and make sure the shaft of the pry bar goes against the backside face of the sprocket. Start to pry up. you may have to stand on the wheel or the carrier to hold it down.
So that collar, C clip chingadera presses into the hub? Hmm... couldnt really tell from the diagrams or by looking at it... 20170330_065824_HDR.jpg

e00bbb308f7e5a8e559f5bc63fd6fdf9.png
 

·
Registered
Joined
·
23,303 Posts
sprocket doesn't "press" on to the carrier. It sits on top and the four nuts (number 27 in the fiche) hold it to the carrier mating surface. The lock tabs (number 21 on the fiche) hold the nuts in place and keep them from spinning.

Just to be clear - the sprocket is the item marked "1" in your fiche up there. If you are trying to remove something else then it is not the sprocket.

Because the sprocket is usually steel, and the hub is usually aluminum, the two items glue each other together with dissimilar metal corrosion. Heat and pressure will sometimes microweld them together as well. Once you break that bond the sprocket will pop off.
 

·
Registered
Joined
·
23 Posts
Discussion Starter #13
sprocket doesn't "press" on to the carrier. It sits on top and the four nuts (number 27 in the fiche) hold it to the carrier mating surface. The lock tabs (number 21 on the fiche) hold the nuts in place and keep them from spinning.

Just to be clear - the sprocket is the item marked "1" in your fiche up there. If you are trying to remove something else then it is not the sprocket.

Because the sprocket is usually steel, and the hub is usually aluminum, the two items glue each other together with dissimilar metal corrosion. Heat and pressure will sometimes microweld them together as well. Once you break that bond the sprocket will pop off.
The sprocket is loose but will not go past the hub C clip area. That OD is bigger and wont allow the Sprocket to slide out... See video below.

 

·
Registered
Joined
·
1,231 Posts
Clean, sand, file to make sure the flange area is round and without burs. Do the same to the I.D. of the sprocket. Heat the sprocket like Geeto said to help it expand and slide over the flange.
 

·
Registered
Joined
·
23 Posts
Discussion Starter #15
Clean, sand, file to make sure the flange area is round and without burs. Do the same to the I.D. of the sprocket. Heat the sprocket like Geeto said to help it expand and slide over the flange.
Gotcha! Will do later on today. Currently at work trying to be a e-mechanic
 

·
Registered
Joined
·
23 Posts
Discussion Starter #17
Yea that should come off. It may be just corroded or it maybe flared out with use??............is it way bigger or just a little corroded
It appears to be slightly bigger.. i couls take some material off and see if it free's it up. But i found it odd the Sprocket didnt just come off easy.
 

·
Registered
Joined
·
23 Posts
Discussion Starter #18
Yea that should come off. It may be just corroded or it maybe flared out with use??............is it way bigger or just a little corroded
Popped it off after giving it some heat and using a large pry bar. Guess those tolerances were a bit tight! Thanks guys for your input:eek:
 

·
Registered
Joined
·
3,024 Posts
Popped it off after giving it some heat and using a large pry bar. Guess those tolerances were a bit tight! Thanks guys for your input:eek:
That's not an uncommon problem on that design. As the sprocket moves around the groove for that circlip flares out. Make sure you machine it clean before forcing a new sprocket on. You can do that with a 10" fine tooth file and take your time to remove only the metal that has been spread outwards.
 
1 - 19 of 19 Posts
Top