I just traded my old 215 in on an '05 312 CL with 5900 hours. My two main concerns are, the undercarriage seems to be at least 60-70% left, but about 7 or 8 joints on each rail are stuck in the position they would be in as they went around the sprocket or idler. I can't seem to get them to free up. When you track any distance at all over hard ground, it really beats the heck out of the machine, and when it does, the monitor flashes "Backup Switch On," whatever that means. When it does this, the throttle knob won't work and the swing brake locks up. Everything else works fine, though. After you let it sit for a minute or so, everything goes back to working normally. I'm assuming the electrical problems are a direct result of the extreme vibration the kinked up tracks are causing. Has anyone ever heard of anything like this? Thanks in advance.
With that many joints locked, it is probablly good ideal to have tracks reworked. This would be good investment as can turn pins 1/2 turn for good operation. I was quoted less than 400 dollars for in shop labor for each track on a hitachi. Look wiring over for possible damaged connector or wiring scuff. I know some will tell how to free pins. Good luck.
Good day jmoney86 Here is an extract from excatech.com failure report which may be applicable to your experience:- Seizure of track chain links This issue affects the smaller range of heavy excavators that are often used for site transportation of goods and materials. In general this affects chain sizes of B-D4 through to some B-D6 however the larger sizes are less frequent. In normal circumstances during the track chain wear process the links and associated parts become loose and more prone to derailment. This can be recognized when the chain actually snakes and the internal wear indicates that the chain is worn, however in recent years there has been incidence of link seizure. As a consequence this can result in more rapid wear to the drive sprocket than would normally expect. There are a couple of courses of action open to fix this issue, the chain could be completely dismantled – cleaned – lubricated and reassembled. Unfortunately often during dismantling worn counter bores are discovered necessitating link replacement. Inevitably the costs escalate and the end result is a track chain, which will have a short life in comparison to a new chain. Additionally renewed hardware, as a matter of good practice will add to the costs. Recommended solution. Establish how many links are affected; base a constructive diagnostic view on the extent of the issue. It is worth bearing in mind that the cost of running to absolute limit may not increase costs. Kin regards Uffex
There is a switch under the right hand armrest for the backup system , the backup system is used if u have an electrical problem in the pump controller system so u can limp the machine back to the shop or a safe place . Sent from my RM-860_nam_usa_100 using Tapatalk
I had track links lock up on my LB225 at 3000 hours. We hit them with diesel everyday for a month or two and they finally loosened up. Good Luck, CD
We have been through this before. The condition is called bridging and is usually caused from the lubricant that was installed in the pins and bushings when the chains were assembled. If you don't run the machine for a long period of time the lubricant turned into cement and locked the link in place over the sprocket or idler. In my experience the problem was real common with grey market machines that had been worked around salt water. The fix is as described by Mr. uffex. Colorado Digger was successful with the diesel treatment but up here in land of greenies and rain, "there shall be no visible sheen emanating from any machine". Good Luck!