Kobelco hydraulic excavators

[ccarmy]

Hi Mr Kobelco,
I have a 2002 SK210LC VI Serial # Y007-U0942 that reads A1 CPU ROM Failure. All functions work normally but can only run throttle to about half speed. The batteries seemed to be sluggish when I started it. Any help on this matter would be greatly appreciated.

Hi John, It sure sounds alot like what I just went through with my small sk15sr kobelco exscavator. before my #5 fuse in my fuse box begain to pop, it would sound like my battery was really weak, many times I brought my battery home from the job site and put it on charge only to find out that it had a full charge on it. The number 5 fuse went to my engine stop solinoid, which also checked out to be fine. Mr. Kobelco sent me a full electrical schematic of my machine and I checked every wire to that paticular system. Even though my multi meter was showing that I had a hot ground some place I could not find it at all. I banged my head around on this problem for days trying to figure out what was going on with my little machine and it seemed that I could get nowhere with it. As a last resort, I reran new wireing inplace of the old to every part that was ran off of that paticular fuse. One came from the fuse box to the ignition, and the other from the top end of the fuse down to the engine stop solinoid. Just knowing now that I had fixed the problem or at least bypassed it, I turned my key on and (POP)! The crazy thing poped again. Turns out that all along I had a tumberler that had fallen accross two points inside of the ignition and was causing a hot ground inside of the ignition. So after all of the stress and head banging over the problem, $181. some odd cents, a new ignition and its fixed. Now I don't know if this would be your problem or not, but it may help just to keep it in mind. I would hate to see anyone go through what I have been through with mine. I wish you the best of luck.

 

[ccarmy]

hi,
please specify your serial number. if you e-mail me at hf_hydraulics@hotmail.com i'll see if i can get you the full elec schematic.
it'll make it easier to troubleshoot.
cheers!
adam

Mr. Kobelco I just wanted to take a minute to thank you again for your help with my exscavator. The electrical schematics was a great help, turned out that the ignition switch itself was my problem all along. Man I would have never thought it because it functioned just fine, not the way you would think a ignition with a broken tumberler would function. I mean the key turned, the acc came on, but the #5 fuse would then pop, and of coarse then it would not start. Any ways thx again, I am really glad to have such great help and assistance at my fingertips. Earl

 

[ccarmy]

Just wanted to say real quick, John if your #5 fuse pops, check your ignition switch before you rewire your machine. LOL good luck with your problem. You might put the pos. terminal of a multi meter in each fuse placement while having the other on a solid ground to check each system for a hot ground. It does sound as if you might have a ground some where that is pulling down your batteries with the key iether on or in the start possition. Best of luck my friend. Earl

 

[MR. KOBELCO]

Mr. Kolbelco,

I have an oil seal leaking on my Case CX25, it appears to be that center seal based upon leakage in all positions, definitely gear oil as we discussed when you replied over on my Case Excavator thread. Another person suggested those seals will dry up or rip due to lack of use and that fits with me, the machine mostly sits in my barn. I went through the flush and fill a couple of times, now have fresh synthetic gear oil in it but still have a slow leak although it's not as bad as it was. My guess is that for the little I use this machine it will be OK until winter when it will not be in use. Is there a repair manual available for those drives? I would like to do this myself. Also, can it be done on the machine or does the entire unit need to be removed? Thanks again!

hi bayrat,
i am guessing that your case cx25 has a plate on it saying made by kobelco ?
if so, please supply your serial number by e-mail to me as so i can respond to you with what you need.
hf_hydraulics@hotmail.com
and yes, the complete final drive will need to be removed off the machine to do a proper repair.
however, do not remove until you review the service repair section on the drive unit.
bolts may need loosening off by hand before taking the unit out.
cheers!

 

[ccarmy]

In the battery compartment on this machine and others such as the SK150 and the Sk200/220 there is a piece of pipe about 5 inches long vertically welded to a bracket on the frame. It has a 3/4 by 3/4 inch notch out of the top of it. I'm sure that everybody who owns a Kobelco knows what this little thing is for except moi. Would somebody be so kind as to let me know what Kobelco had in mind when they tacked this thing to the machine? Does anybody use it for anything useful? Thanks in advance.

Hello friend, I feel certain that you are refering to the battery vent pipe. In any machine that uses batteries or a battery for that matter, there must be a way for gases to escape the battery compartment. I think that is probably what you are seeing in your Kobelco sk130lc. Not possitive of coarse without looking at it, but with the notching in the top end that you described it sounds like that would be it.

 

[grandkobelco]

A1 cpu failure

Hi John. Their must be the computer flue going around, I'v worked on two exc in the last two months with the same code on the dash and the same symtoms. Do all the test Mr kobelco had you do but if the "A" adj dosn't work exactly as described, I think your going to need a new controler. Just another kobelco mech opinion.

 

[John.Schuttler]

Hi grandkobelco, When I went to do the "A" adj, the rpm wouldn't display when I pushed the screen change switch. So right or wrong I did the "A" adj any way but when went to step 4 the computer took the step motor to full throttle and that was it. So now am trying to chase down problem with RPM sensor or computer.

 

[trinagreen]

Hi, we have a Kabelco SK 150 Mark III that we are needind some help with changing it from computerized to manual.....any help in this matter or pointed in the right direction would be greatly appreciated!!! We have a scrap metal business and I work in the office part and am the one now put in charge in correcting the problem after several attempts of our "machinery mechanics " coming up empty handed and steady running up a bill that has showed no result. So once again help please.........

 

[MR. KOBELCO]

Hi, we have a Kabelco SK 150 Mark III that we are needind some help with changing it from computerized to manual.....any help in this matter or pointed in the right direction would be greatly appreciated!!! We have a scrap metal business and I work in the office part and am the one now put in charge in correcting the problem after several attempts of our "machinery mechanics " coming up empty handed and steady running up a bill that has showed no result. So once again help please.........

hi trina,
as discussed over the phone,...
it is not recommended to run the machine without the computer.
it is the brain of the machine and must be functional for the horsepower control of the engine and hydr pumps.
otherwise, hyd pump damage will result.
i have sent your mech info...let me know if you do not get it.
cheers!
adam

 

[grandkobelco]

John, unfortionatly thats the exact same thing the ones i'v been working on did. It's easy to check your rpm senser. Press down on the buzzer stop button while you start the engine. The first screen you see on your dash is the controller info screen. Push the screen change switch one time to get to the rpm screen, where you see MEAS that is the rpm that the controller is reading. If it reads O your rpm senser is bad, or the wireing. If it is reading rpm you probly need a new controller Sorry.

 

[John.Schuttler]

grandkobelco that is the same conclusion that I am coming to. How much is a controller and what kind of time frame is it to get one? 2002 SK210LC-VI Serial YQ07-U0942

 

[grandkobelco]

I'm in my polebarn now and will probly be here all weekend. Monday morning i can check price and shipping. I'm in west mi. so if there are any dealers closer to you you want to check with it might be a good idea. Those controllers need to be programed before you install them. After instalation you still need to do a "A" adj.

 

[Van Koop]

In the battery compartment on this machine and others such as the SK150 and the Sk200/220 there is a piece of pipe about 5 inches long vertically welded to a bracket on the frame. It has a 3/4 by 3/4 inch notch out of the top of it. I'm sure that everybody who owns a Kobelco knows what this little thing is for except moi. Would somebody be so kind as to let me know what Kobelco had in mind when they tacked this thing to the machine? Does anybody use it for anything useful? Thanks in advance.

Some machines have a grease gun holder welded by the batterys from factory.

 

[grandkobelco]

John.S

Sorry for the delay, I didn't get two the shop all monday so I called our parts counter and he ballparked that controller at 1700 hundred, give or take a little plus shipping. If we can help call Grand equip 616-896-7700. Thanks, Wes

 

[ssupercor77]

Hi Mr. kobelco I just bought an SK-220lc mark 3 and everything works great except the display on the right console it shows black sometimes other times it dosent show anything. I was woundering if it is needed or can i have some manual oil pres guage and water temp. and just run it that way Thanks

 

[rippy154]

I have an sk130LC Mark 4 serial # YPU 2412 that has a weak swing

I checked Piolt pressure and had 800psi ......the spec is 670-750 psi

I checked Mains reliefs with both tracks stalled and had 5100psi at both pumps the spec calls for 4980-5050 psi

I checked port reliefs for swing and got 1600psi stalling the swing to the left (rv12) and 3800psi stalling to the right (rv11) the spec is 3982-4409psi...... I know that one is real low and the other is a tiny bit low so I figured I would swap the reliefs to see if the real low one would go to the other side but it didn't .....so now I am a little confused.....the reliefs also don't seem to be adjustable and the are pretty pricey so I don't want to spend money on the wrong parts..... I guess I am going to try seeing if the swing control valve spool is stuck out of the neutral position or switching the discharge lines of the pumps to see if I have a problem with one of my pumps....... any advice would be great

thanks in advance

Stephen

 

[rippy154]

I forgot to mention this machine has a swing priority circuit and a modle S22T swing control valve

 

[MR. KOBELCO]

I have an sk130LC Mark 4 serial # YPU 2412 that has a weak swing

I checked Piolt pressure and had 800psi ......the spec is 670-750 psi

I checked Mains reliefs with both tracks stalled and had 5100psi at both pumps the spec calls for 4980-5050 psi

I checked port reliefs for swing and got 1600psi stalling the swing to the left (rv12) and 3800psi stalling to the right (rv11) the spec is 3982-4409psi...... I know that one is real low and the other is a tiny bit low so I figured I would swap the reliefs to see if the real low one would go to the other side but it didn't .....so now I am a little confused.....the reliefs also don't seem to be adjustable and the are pretty pricey so I don't want to spend money on the wrong parts..... I guess I am going to try seeing if the swing control valve spool is stuck out of the neutral position or switching the discharge lines of the pumps to see if I have a problem with one of my pumps....... any advice would be great

thanks in advance

Stephen

hi,
i would say - yes swap the reliefs.
they are the same.
if the pressure readings swap, open, inspect and reseal the valve.
if they remain the same and does not change sides i would check first off teeing a 1,000 psi prs gauge into each pilot spool cap at the swing motor and verify you are not losing pilot prs.
the swing pilot circuit has shuttle valves in the lines.
or next try swapping the swing shockless valves if you have
otherwise will likely be an issue in the hyd swing motor.
provide me you e-mail if you need tech info, specs and sorts.
cheers!
adam
if you need pricing you can always get a quote from us for giggles.

 

[rippy154]

Adam,

My email is rippy154@yahoo.com

I did swap the reliefs and the problem stayed the same so I will try what you suggest, It is going to be a few days since I have several other machine to check out and fix and that one has some other issues so it is fill in work

Any tech advice or specs I would apreceate and I will gladly let you quote the parts when I find out what is wrong

Thanks Stephen

 

[rippy154]

Just so I'm clear when you say pilot spool cap I am thinking of the Pressure supply sides (port PA & port PB) of the swing control valve????

The other question is I have only 1 shockless valve and there is a block which they refer to as a hydraulic timer???

Thanks