A friend of mine has an lc5 I've been renting and im considering buying. The left track motor seems slow, if you travel much it drifts and it doesn't have enough power to turn it in fast travel. If you switch it to low it'll turn, but slowly. It sounds like its bypassing so i changed the filter which helped some. I was curious if they had any major shortfalls and if anyone had an idea about the track motor. Thanks.
Is the tracks possibly loose I had one that was tracking crooked adjusted the tracks and fixed the problem
The tension looks the same on both sides but its worth a look. Does anybody know the spec offhand? I don't have a book for it.
Unless you know someone who can check things out, you should probably walk away. More than likely the swivel seals are leaking on the one side but there are several possible problems. How many hours you got on this unit and do you know of any major component repairs in the last thousand hours or so? You could have a worn out motor, the swivel seals bad as stated above or the pumps are out of adjustment. The pumps are probably the easiest to check if you have the gauges and know how but there are not a lot of people around that have the tools or the knowledge anymore.
17000 hrs. They haven't done anything to it in 4 or 5 years, the motor was slow when they bought it but it doesn't have to travel much where it usually works. It hasn't got any worse since they've had it but it probably doesn't get a 100hrs a year.
Im not ready to give up yet so I took a couple videos of what it does.
I had the same problem i had a dealer sync the pumps after that it got worse all the functions got slow and weak they replaced a servo valve it worked better for awhile and now im back to the same thing can anyone give me any ideas how to fix this thing?
jjj135, Your description is exactly what I'm talking about on these machines. If the dealer actually adjusted the pumps properly and you still have problems, then the dealer wrench didn't do his job completely or competently. He should have been able to tell you what was wrong, how much it would cost to fix and if there were any short cuts that could get you down the road some and still be useable. The pumps could be worn out. If so they are very expensive to rebuild. The big change to the Dash 6 models meant the components were to get less expensive. A Dash 5 pump a few years ago ran around $12,000 while a Dash 6 pump was about half of that. I really liked working on the Dash 3 and 5 lines but when they are worn out, they are worn out completely. I have come to view them as one of the first in engineered throw away iron.
this is a dash 6 they say they checked the pumps and they are fine now they are telling me that there is a seliniod that is bad
they did put a servo valve on the one pump cost 4000 it worked for awhile but now the same thing somtimes i cant even drive the thing
I've never seen a servo valve go bad on a Dash 6 pump. You probably had better go back to the basics. Have you checked your engine fuel system? If you have a Cummins engine in it you need to check the fuel strainer. Many of the early machines had an inline cartridge like you used to see on cars, except it has a brass strainer on the inside and not a paper filter. The Komatsu engine units have a small strainer in a banjo fitting on the inlet side of the transfer pump. A fuel filter change is probably necessary if you haven't already done that. If your engine is running correctly you need to check for codes in the computer. There is a button on the back of the monitor panel for setting the clock functions. If you push that button and the travel mode shift button on the front bottom left of the panel at the same time and hold it till it shifts to the code reading mode. Write down any codes and then let us know what you have. One quick thing that you can do is to bypass your computer by shifting one of the toggle switches found down with the fuses. As I recall the rear toggle bypasses the pump and puts it at 75% output. If everything comes to life, then you know you have electrical or electronic issues. Good Luck!
have checked the fuel system that is all good it is a komatsu engine havnt checked the codes recently but last time there were none it usually runs good for the first three hours then gets worse as the day goes on somtimes it is rite away when you start it in the morning one thing i noticed if you slam the foot pedals in and out quickly it will work for awhile
chevota84, on the 200-5's the rotary coupling will be your problem, they are very easy to re-seal as you only have to pull the outer case off the spindle, its important to vent the Hydraulic tank first and have some blanking plugs handy for the pipes that go to the joint, this will keep the mess to a minimum, the seals are easy to remove, fitting the new seals just takes a bit of care as you cannot reach some with your fingers, after they are all in grease and oil things up then drop the outer case onto the shaft, to get it down the last little bit often needs a bit of a smack with a big hammer and a bit of wood, not a big smack just a big hammer 7lb sledge is about the stamp, you leave the spindle bolted in place on the excavator, allow 4 to 6 hours to do it depending on the amount of crud about. I re-sealed a r/coupling on a JS220 today and have taken a few shots (pic's) these are a good bit harder to do as you have to remove the complete chunk and a good bit of it is from underneath the car-body, the seals for the 200-5 will cost about £62 in the U.K and this will fix your weak tracking fault, I will be posting the coupling shots in "Shop talk" soon
Cool! Even if I don't buy this thing its bugging me that I don't know what's wrong with it and if I can fix it it'll save me a bunch on the rent.
TCTractors, my 200LC-5 has the same problem chev has described. When you refer to the rotary coupling do you mean the center swivel?
OMB, in the U.K. this centre swivel was called the rotary coupling, but now it is common to call it the "Centre Joint" due to the Doosan parts listing and the Japanese description, but in old money its the Rotary coupling, I used to do a load of work for a large Civil Co' that had heaps of these Komatsu's, the swivel seal replacement was a common job. best of luck tctractors