John Tobin
Member
Hi All
I am looking for some advice on a 1999 Daewoo 130 lc v that I have just bought - the issue with it is that when hot it basically loses tracking power.
It seems to have good digging power for example at the weekend it was good and hot at which point the tracking was absolutely horrendous so I tracked over to stump from a good size tree that I had cut down recently and went about pulling it up. The stump was fairly solid and the machine was either pulling itself over (i.e the whole back was lifting up off the ground) or the whole machine was being pulled in towards the stump. Would this indicate that digging power is ok?
On the tracking it tracks fine when cold in that she will spin herself around without the assistance of the boom/slew and will climb up a fairly steep slope and tracks in a reasonably straight line. Also the high speed tracking seems to also work fine when cold. Once it is hot it doesn't track straight at all and has zero power if I push one on the travel levers on the machine the track tries to turn but fails, the engine does not load up under these circumstances. When I push both levers together it will move the machine around just very slowly
I have got my plant mechanic on it and he is an experienced guy so I have moved the machine to his workshop - he says he wants to replace the seals in the swing center first to remove this as a potential issue as the seal kit is only €220 from Doosan. He will go from there with checking pumps and motors etc. On the track motors would you have any idea what sort of case drain flow rate would indicate the motors were bad/good. Also are there any other diagnostics I can perform on the track motors? I also want to change all the fluids is there a specific grade of hydraulic oil I should be using or one that has better stability when hot
Thanks for the help and advice
I am looking for some advice on a 1999 Daewoo 130 lc v that I have just bought - the issue with it is that when hot it basically loses tracking power.
It seems to have good digging power for example at the weekend it was good and hot at which point the tracking was absolutely horrendous so I tracked over to stump from a good size tree that I had cut down recently and went about pulling it up. The stump was fairly solid and the machine was either pulling itself over (i.e the whole back was lifting up off the ground) or the whole machine was being pulled in towards the stump. Would this indicate that digging power is ok?
On the tracking it tracks fine when cold in that she will spin herself around without the assistance of the boom/slew and will climb up a fairly steep slope and tracks in a reasonably straight line. Also the high speed tracking seems to also work fine when cold. Once it is hot it doesn't track straight at all and has zero power if I push one on the travel levers on the machine the track tries to turn but fails, the engine does not load up under these circumstances. When I push both levers together it will move the machine around just very slowly
I have got my plant mechanic on it and he is an experienced guy so I have moved the machine to his workshop - he says he wants to replace the seals in the swing center first to remove this as a potential issue as the seal kit is only €220 from Doosan. He will go from there with checking pumps and motors etc. On the track motors would you have any idea what sort of case drain flow rate would indicate the motors were bad/good. Also are there any other diagnostics I can perform on the track motors? I also want to change all the fluids is there a specific grade of hydraulic oil I should be using or one that has better stability when hot
Thanks for the help and advice