Hey guys,
I also have the same machine (1997 pc50uu-1 with 5200 hours, bought it at 5000hrs rubber tracks). I was wondering if any of you guys can comment on the strength of your final drives? Both of mine have been replaced by aftermarket units. The left replaced by the previous owner and the right was replaced by myself a couple month ago -shaft snapped on the old. The tracks will spin no-matter-what when both are going in a straight line together. But as soon as it gets hot, i have a tough time getting either side to turn individually without stalling the final drive out.
I have rebuilt the center swivel. both final drives are new (not remanufactures). And the relief pressures have been set at 3100psi and 3200psi for pump 3 as per manual (however when i set them the machine was not "hot"). All other functions seem to work fine. all of the track idlers are in good order. i even put in top rollers on both sides to replace the original steel rub plates.
It has been a great machine so far, but the stalling final drives have me frustrated, especially when in tight places!
Please tell me the weak turning ability of this machine was not innate to this model! i'm starting to think i have something faulty in my main relief valves, or spool valves? Any help is really appreciated!