2012 pc360-10 9000 hrs , the track is getting wore ,but it’s still tight . The problem I have is my planetary drives have a little slop in them making the hole machine shake back and fort when working . When I have a guy in the machine jerking back and fort , the sprocket isn’t moving it’s the hole drive, the brakes work perfect and hold , I’m wondering if the center shaft connecting the drive to the moter could be wore a little making the drive too sloppy? Any one every looked into that ? Or is the whole gear set wore . Like to know from guys that had looked into this. before I take cover off and look. Thanks
How tight are your tracks?
Good day Suggest you take a look at the lubrication see if there is signs of wear often cast iron residue is prevalent however somewhat normal, look for small pieces that may have broken away. From your description it sounds like wear within the planetary train. Illustration may give you some idea. Kind regards Uffex
Define “the whole drive is moving?” As in the mounting flange is moving on the track frame?
They are nice like they should be
The planetary rocks about 1” back and fort . The drive mount is solid . It’s somthing within , and I don’t think it’s the moter , I’m wondering if the splines on the center pin would wear a little causing some slop?
Nothing left but to pull the drain plug and see what kinda shrapnel you find. If your lucky, one planet broke and you might be able to repair. Usually, its catastrophic failure requiring a new travel box.
The final drive is bolted into the track frame. The sprocket is bolted directly to the final drive. If the sprocket is not moving and the final drive itself is moving, then the problem is where the final drive bolts to the track frame. Take off the covers on the inside of the frame to see the drive motor. The ring of bolts on the frame are the final drive mounting bolts.
^^^ is my understanding of what was said.
No the drive mount is solid , the sprocket moves , but not the chain on the sprocket , like if I was wore out . The movement is within the drives , both do it . It’s like the pin connecting the gears to the moter is a little lose.
Pull the cover, look at the gears. Have you checked the gearbox oil? Is there any? Is it dust? These are simple things to look at and won't cost a fortune to inspect, just some silicone or an o-ring and some oil. BTW SAE30 oil in the travel box.
I've only had Komatsu finals fail in two ways. The first and most common failure is that they lock up. There is virtually no room inside of them so a chip in a gear or loosened anywhere ends up turning the unit into a scrap iron crusher. The other failure is the the rotary seal starts leaking. You might want to watch this video of how undercarriage works on an excavator because it sounds like your tracks are worn out.