I have A 632 Bobcat that I'm using while I build my house. I bought it used about a 8 months ago. It needed some TLC and has performed great so far. Last week I was backfilling the foundation wall and a chain jumping sound came from the right front tire. The repair manual is very vague about chain adjustment. Can anyone shed some light on this situation. I have been told every thing from there is no adjustment, to the chains and sprockets need to be replaced. Thank you, Bruce