Drag Racer,unfortunately a clean plug on the other side is no indication that something isn’t going wrong.All it means,that it hasn’t started to fail today.
With final drives,you can remove both track frames yourself in preparation for your specialist coming and only paying him to do the very skilled work.
By having both finals apart at the same time,it’s very common to swap parts from each final to the other in order to wear both sides out evenly.
Clearly any big gear lumps that have broken up are likely scrap,but you never know your luck.I’ve done a few of these on larger D6/D8 and D9 tractors that I own over the years and from experience I can tell that the side you think is allright is allways in worse shape than you expected.
I will also point out,that as an experienced owner,I’ve allways understood it’s wise to get an experienced fitter to take the job on and not try it yourself.It takes experience to know what parts you can and can’t put back into it.Your Cat dealer will simply scrap everything that doesn’t meet their strict tolerances as is their way.They have no choice.
It’s also a dangerous game to play with the tooling.It’s a baby of a tractor,but the pain will be same as a big one if things start flying.
The key here is finding a good man to do the job.
Good luck
