I must be doing something wrong, because customers keep bringing me their old, decrepit machines to repair.
Today's headache is a Greenfield Tractor 11 with drive chain issues.

All my records show that the unit should be fitted with 1/2 x 5/16 chain (#40), but the lower sprocket on this machine appears to be more suited to 1/2 x 3/16. In other words, the big sprocket is too narrow for the chain...

Anyone able to shed some light on the original chain size?
Yes, it is possible to use wide chain on narrow sprockets, but it's bad engineering and increases wear rates by a ridiculous amount.

Last edited by CyberJack; 25/04/16 03:46 AM. Reason: Topic heading.
You can be part of the problem.....or part of the solution.
IT'S YOUR CHOICE...EVERY TIME!