Advice on putting a thrown track back on a 312B.

[CatKC]

The tracks were run tight enough to push on the spring which left the nuts loose on the rod and able to back off. Where did you find them sitting when you removed the idler assembly?

That is also my guess. If there was a 'jam nut' properly installed I don't see how it would have come off, I've never had one come off.

I did not find the nut (I doubt if two would have fallen off at the same time) when I pulled the idler off. Had I found them it would have saved me some time trying to push the idler back to put the track on.
I am going to look for it today in the area where the track came off. I walked/moved the Cat quite a ways to get it out of mud and on level ground.

 

[CatKC]

the machine Serial Number

Nige, is there any significance to the "K" on the end?
SN 9GR00432K

 

[Nige]

is there any significance to the "K" on the end?
SN 9GR00432K

Is it stamped like that on the S/N plate with the "K"..? I can't say I've ever seen that before.