Kobelco hydraulic excavators

[Thomaslouise]

Hour meter for SK330

SK330-8 sn.LC11-08653
How can i check actual hour meter showing at monitor display ?

Sorry if this not the forum for asking..tgis is my first time to post.

Thanks in advance

 

[Ruahines]

Thanks for the part numbers.
They were ordered here before Christmas but I don't expect them until early in the New Year.
Fortunately the 5 minute araldite I put over the plugs/wires is still holding and all is going well.

 

[RollOver Pete]

Oil requirement for a SK 135SR swing motor?
Everything I have is in Japanese ....so Im lost.
Thanks in advance.

 

[James.Clayton]

Hello
Does anyone know where to download Kobelco excavator manuals without having to pay for them??

Look forward to your help.

Cheers
James

 

[VamanShenoy]

Does KOBELCO CRDI pump need to be timed. If so any timing marks available ?

 

[Vnco]

Newb to the forum, not sure if I'm posting correctly but here goes. I have an 05 sk135srlc that has an issue with the boom hyd circuit. When lowering the boom, the hydraulics will not produce down pressure initially. Once the bucket makes contact with the ground, I can release the control and then when I push the control again it produces down pressure. It has done this since I purchased the machine more than a year ago. It is most annoying in hard ground or rock. Otherwise the weight of the boom produces enough down pressure for normal digging. Any advice or ideas would be great. Thanks

 

[digger_hunter]

Hey VNCO
Looks like it could be a faulty pressure sensor on the pilot circuit. Try and find the boom down pressure sensor and swap it with another known good one and chvek of the fault carries over. I'm not sure where they would be located on yours but I'll try and dig up the circuit. I think that when you press down on the lever the pressure sensor is not telling the computer that you are actually moving the boom so it doesn't tell the pump to increase the flow.

Hopefully if you can figure out which is the boom line you can change the line over and do some investigations


Hope this helps.

 

[Vnco]

Thanks for the quick response hunter. It's on a job about 45 min from my office. I'll be back out there Tuesday and I'll give that a try.

 

[digger_hunter]

ok. its a real pain on that machine to get to stuff but if you trace the line from the control valve you should be able to identify the pressure sensor.
Btw is the boom the only thing acting up?

 

[Vnco]

That is the only function acting up and it is only when applying down pressure. When raising the boom everything functions fine.

 

[digger_hunter]

ok. must be a pressure sensor. There should be a error code on the display but sometimes you get the symptom when the sensor goes towards an extreme end of its functionality. SO could be the case if it hasn't flagged an error code yet. But if you can swap a sensor off another function to check if it fixes the problem and leave it like that till you get a spare part. Relatively cheap sensor to be honest.

 

[Ruahines]

We had an issue with a SK260 air con. Operators were complaining that as the day went by it warmed up.Pressures not quite right but within range, a/c cycling like crazy so we scheduled it for an evaporator clean.
Kobelco "engineers" deserve a kick in the bum for that design. Seat out and various pieces of hardware moved to one side and eventually the airbox was out and the evaporator is a slide in unit with 5 screws holding it. As suspected the evaporator was 80% blocked, but the point I am trying to make is that we could have pulled the evaporator out from below if the "engineers" had cut a slot in the floor and covered it with an inspection plate. Several hours work would now be an hour max.
The difficult question however is, how to train "operators" to keep the cabin clean.

Also we had issues with our SK330 pro valve wiring a while ago. willie gave us the numbers for the 2 pin plugs which solved most of the problems. the 3 pin plugs were a lot harder to find though. They are a Sumitomo connector and this guy sells them in Japan.
http://www.easternbeaver.com/Main/Elec__Products/Connectors/Sealed/SMHW/smhw.html

 

[Kobelco ireland]

Newb to the forum, not sure if I'm posting correctly but here goes. I have an 05 sk135srlc that has an issue with the boom hyd circuit. When lowering the boom, the hydraulics will not produce down pressure initially. Once the bucket makes contact with the ground, I can release the control and then when I push the control again it produces down pressure. It has done this since I purchased the machine more than a year ago. It is most annoying in hard ground or rock. Otherwise the weight of the boom produces enough down pressure for normal digging. Any advice or ideas would be great. Thanks

Hi VNCO
I am also new to this forum was wondering if you got the problem with your machine sorted out

 

[Kobelco ireland]

Oil requirement for a SK 135SR swing motor?
Everything I have is in Japanese ....so Im lost.
Thanks in advance.

Hi Pete
Swing motor oil is Ep 80/90

 

[Vnco]

Kobelco Ireland, I have not had time to trouble shoot the problem yet. I hope to find some time later this week. I will most certainly advise of my conclusion. Thanks.

 

[Kobelco ireland]

Ok maybe also check if your machine has after market check valves fitted to lifting cylinders. I have come across a few machines in ireland with faulty after market check valves that caused the machines to act the same way yours is acting.

 

[Vnco]

You would be speaking of a craning valve designed to prevent the cylinder from colapsing in the case of a hose rupture? I don't believe there is anything like that on the machine but I will certainly have a look. I would imagine it would be fairly obviously mounted directly at the cylinder port? Thanks for the help.

 

[Kobelco ireland]

You would be speaking of a craning valve designed to prevent the cylinder from colapsing in the case of a hose rupture? I don't believe there is anything like that on the machine but I will certainly have a look. I would imagine it would be fairly obviously mounted directly at the cylinder port? Thanks for the help.

Yes they are the valves I was asking about there would be one on the bottom of each lifting ram, if they are not fitted check what digger_hunter said.

 

[Pipelinemech]

Anyone else having problems with the sk170 def system? I have two sk170 with the fpt engine. 2012 models. I would love to be able to turn the def off and put a regular muffler on it. Any help?

 

[plowboy689]

Hi guys, new to forum . I have a kobelco 220 LC mark4 It acts as if it might have a restriction on returning oil to tank It loads the motor when trying to walk or operating the boom. The swing does not seem to load the motor. I have recently rebuilt the bucket cylinder and the packings were terrible. Is there a prescreen or anything in the valve block that could be in the wrong position that would cause this problem. Thanks.