broro22 Registered User
#1

Just wondering can anyone shed any light on this one for me. Weve got a blue kobelco 210 year 2001 i think shes a dash 6.

She wont track on the right lever (even tough you can hear the pumps cycling up) unless you touch the left one. Also the dipper arm will only go out about half way then stops moving but the pump still cycles up and will actually stall the engine but if you touch the left track pedal the dipper sails on as normal.

Just wondering if anyones come across this as im bald enough without pulling out anymore hair

The Nutty M Registered User
#2

Have you done any investigating of the valve chest?If you lift the right track and put it tracking does it make any attempt to turn the track at all? My first thoughts are sticking valves but never heard if anything like that.

th3dan Registered User
#3

as the nutty m said valve chest .as it more or less be sticking relief valves .or else check the hoses and connections for leaks as they wont work if not at the right cracking pressure

lee taylor Registered User
#4

I have an SK60 kobelco just after getting hydraulic pump done up when i put it back together digger went good for half an hour now movements are back to slow again, left hand leaver wont do nothing only arm will lift up, but killing the engine very bad, the rest of the movements wont do nothing, she is tracking slow but kills engine too. she kills engine on most movements but wont do nothing. i have the spool chest of and cleaned it all out and release valves of and blew all them out and cleaned them now i am stuck. can someone please tell me what the problem is? need help.

#5

lee taylor said:
I have an SK60 kobelco just after getting hydraulic pump done up when i put it back together digger went good for half an hour now movements are back to slow again, left hand leaver wont do nothing only arm will lift up, but killing the engine very bad, the rest of the movements wont do nothing, she is tracking slow but kills engine too. she kills engine on most movements but wont do nothing. i have the spool chest of and cleaned it all out and release valves of and blew all them out and cleaned them now i am stuck. can someone please tell me what the problem is? need help.

You've done all the filters right? All the hydraulic ones?

#6

If a pump fails it is imperative that the whole system is cleaned.

All the brass/swarf from the failed pump is lurking in the hyd loop of the machine and will wreck a new pump in a very short time.

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lee taylor Registered User
#7

i have 2 new filters in the tank i think thats all is in her not sure .i cleaned out the tank twice with new oil each time am still not gettin the problem

#8

lee taylor said:
i have 2 new filters in the tank i think thats all is in her not sure .i cleaned out the tank twice with new oil each time am still not gettin the problem


Have you physically cleaned the tank or just changed the oil?

Did you cut the filters open and check for debris?

Your next step would be to check what system pressure you are getting. You should also check your case drain out of your pump and see if it getting hot when a circuit is dead headed.

If it is you will need to find someone with a flow meter to measure the case drain

1 person has thanked this post
lee taylor Registered User
#9

i physically cleaned the tank there were very small fillngs in bottom of tank each time i cleaned it,changed both hy filters both times,got it pressure tested at pump it OK,i don't have a clue where dirt would be stuck in her i have the spool chest of cleaned and blew out i am now at a lost end

Carbondrive Registered User
#10

Hi Mate.
Did you ever get the digger sorted ??
Cheers,

J

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