Hey guys, I just found a post on a CAT forum about a 247 that has the exact same symptoms as mine. I believe the 247b and the RC50 have basically the same drive system. Here is the post:
Recently our 247 track machine started acting up after about 15 minutes of running. The tracks will just slowly start to cut in and out. The longer it runs the harder it becomes to move and eventually leading to complete failure and is a paper weight. After the machine cools down you can hop in it and drive it no problems at all for 15 minutes. When the tracks start to cut in and out you can drive it but once met with resistance such as pushing dirt or anything it just cuts out 100%. It will not even go up a hill when it starts acting up. A few suggestions we already have gotten were One of the track motors is failing, Another was the parking break is shorting out and coming on. I just flushed 90% of the systems hydraulics by taking off every line and blowing it out, I even cleared all the cylinders, Put a new Cat filter and the higher grade hydraulic fluid. It worked for about an hour this time till it started acting up but it is acting up again.
When driving it when it start to act up its like you hit and invisible wall and it will just dead stop if you're going up a hill or sometimes even on flat ground, And it takes a lot of coaxing to get it to move again, If you get stuck going forward usually you can get it to go back wards or you can walk it back and forth by working the control stick back and forth moving each track individually.... Its a really odd problem and we have gotten a lot of different opinions Im pretty much open to anything at this point.
Any thoughts? Anyone else have this problem?