Chain ware in 443B

[MaxW]

It looks like the chains driving the front wheels have ware on the side of the links. Both front chains, but just on one side of each chain. I didn't see it until I had the chains removed, but I presume it is the disk brake teeth that were chipping away at the side of the links. Is this from using #60H chain instead of #60 ? Or, is this from the brakes being out of adjustment or incorrectly installed? I saw on another thread pictures of the drive gears of a 743 and it appeared there where circle clips fitted to the drive gears to keep the brake disk in the center. There is no groove in the gears on the 443B. was this a design flaw?

 

[MaxW]

Problem seems to be with the #60H, going to use the #60 chain for the front.

 

[Tazza]

Problem seems to be with the #60H, going to use the #60 chain for the front.

I never thought the difference between the two would have been enough to rub... Slight marks on the brake disc is normal, deep gouges are not.

 

[Tazza]

I never thought the difference between the two would have been enough to rub... Slight marks on the brake disc is normal, deep gouges are not.

I thought it shold have the clips to hold the disc, strange that it's not there.
How well adjusted is your park brake. It should use brass pieces to clamp the disc, if they are too loose, they may not hold the disc straight allowing it to move and contact the chain? just a possibility.

 

[MaxW]

I thought it shold have the clips to hold the disc, strange that it's not there.
How well adjusted is your park brake. It should use brass pieces to clamp the disc, if they are too loose, they may not hold the disc straight allowing it to move and contact the chain? just a possibility.

The brakes were none functional, I'm still trying to sort them out, but I think the main problem is the design of the drive gears. I'll try and link in some pictures, P1080840 by MaxW66, on Flickr P1080849 by MaxW66, on Flickr P1080850 by MaxW66, on Flickr P1080852 by MaxW66, on Flickr New chain installed P1080843 by MaxW66, on Flickr

 

[MaxW]

The brakes were none functional, I'm still trying to sort them out, but I think the main problem is the design of the drive gears. I'll try and link in some pictures, P1080840 by MaxW66, on Flickr P1080849 by MaxW66, on Flickr P1080850 by MaxW66, on Flickr P1080852 by MaxW66, on Flickr New chain installed P1080843 by MaxW66, on Flickr

Oops, still trying to figure out how to post picture on this site. The old chains from the front, the left one is a #60 and has less ware then the #60H chain on the right. .

. The new chain installed, #60 for the front(on left), #60H for the rear(on right)

 

[MaxW]

Oops, still trying to figure out how to post picture on this site. The old chains from the front, the left one is a #60 and has less ware then the #60H chain on the right. . . The new chain installed, #60 for the front(on left), #60H for the rear(on right)

Additional pictures here http://www.flickr.com/photos/84400886@N05/

 

[Tazza]

Additional pictures here http://www.flickr.com/photos/84400886@N05/

Now i understand. Looks like it's rubbing on the sprocket, removing part of the link. It's almost as if the groove for the chain isn't wide enough for the chain to not touch the inner part of the sprocket.... You could try hitting the corners with a file or a lick with a grinder to remove the sharpness? It may prevent it chewing into the new chains.