Daewoo 140 Tracking issue

[Will123]

Hi guys, I’ve recently bought an 05 Daewoo 140lcv. She seems to have a tracking problem on one track. She tracks slower going in one direction. Has anyone got any suggestions? She’s got a new track motor on that side and I have checked that the plunger is working fine on the leavers. Would that suggest that it’s a fault track motor or a pressure problem? Many thanks. Will

 

[JD450A]

Hi guys, I’ve recently bought an 05 Daewoo 140lcv. She seems to have a tracking problem on one track. She tracks slower going in one direction. Has anyone got any suggestions? She’s got a new track motor on that side and I have checked that the plunger is working fine on the leavers. Would that suggest that it’s a fault track motor or a pressure problem? Many thanks. Will

Likely a badly identified fault which has been hastily addressed by replacing the track motor without due investigation.

I'd hazard a guess that the center joint is bypassing pressure through the seals.

 

[Will123]

Likely a badly identified fault which has been hastily addressed by replacing the track motor without due investigation.

I'd hazard a guess that the center joint is bypassing pressure through the seals.

Thanks for your reply! Is that a big job and how do I go about doing it?

 

[JD450A]

Thanks for your reply! Is that a big job and how do I go about doing it?

The Joint on that size machine is pretty easy to take out and strip. Will be in the center of the slew ring behind the boom. BUT

Someone has already f***ed away a large amount of money replacing a track motor. Now it's either had a terminal failure (in which case there's a chance of particles in the Hydraulic system and quite possibly causing issues) or they have'nt diagnosed the problem properly.

If it was my machine i'd spend some money on a proper plant engineer to come and look/test the machine and go from there.

 

[CPS]

Check your idlers as well, i seen a problem like this witch turned out to be a collapsed idler

 

[Will123]

The Joint on that size machine is pretty easy to take out and strip. Will be in the center of the slew ring behind the boom. BUT

Someone has already f***ed away a large amount of money replacing a track motor. Now it's either had a terminal failure (in which case there's a chance of particles in the Hydraulic system and quite possibly causing issues) or they have'nt diagnosed the problem properly.

If it was my machine i'd spend some money on a proper plant engineer to come and look/test the machine and go from there.

Yes definitely, I only bought the machine last weekend so just doing a few bits on it and this is one job. The old owner put the new motor on a few weeks ago. I will get a plant fitter to have a good look at it.

 

[Will123]

The Joint on that size machine is pretty easy to take out and strip. Will be in the center of the slew ring behind the boom. BUT

Someone has already f***ed away a large amount of money replacing a track motor. Now it's either had a terminal failure (in which case there's a chance of particles in the Hydraulic system and quite possibly causing issues) or they have'nt diagnosed the problem properly.

If it was my machine i'd spend some money on a proper plant engineer to come and look/test the machine and go from there.

I have taken the dipstick out of joint/ valve block behind the boom and there seems to be particles in the oil. Could that be from the old track motor if it failed?

 

[T whiting]

That'll be the slew gearbox sounds like a separate issue are you sure there particles and not bubbles

 

[Will123]

That'll be the slew gearbox sounds like a separate issue are you sure there particles and not bubbles

It might be bubbles. I dipped it 4-5 times but only found one tiny bit so it might be nothing. She’s really tight on slewing, stops and starts with the leaver correctly

 

[V8Druid]

Thanks for your reply! Is that a big job and how do I go about doing it?

it's a messy one involving a hell of a lot of pipes !!

 

[Davedb]

it's a messy one involving a hell of a lot of pipes !!

Not that bad on a track machine, a duck is a different beast with blades legs and steering, only two pipes to each track motor then a case drain and possibly another pipe for two speed tracking

 

[Shovelhands]

Some machines you can pull them apart in-situ, so you only have to take half the pipes off.
If it’s an old machine then I think a rotary coupling refurb is essential before tackling any tracking imbalance issues

 

[V8Druid]

Not that bad on a track machine, a duck is a different beast with blades legs and steering, only two pipes to each track motor then a case drain and possibly another pipe for two speed tracking

aye … fair comment Dave …… my 'Drema'd be a nightmare !!

 

[Stubota86]

The Joint on that size machine is pretty easy to take out and strip. Will be in the center of the slew ring behind the boom. BUT

Someone has already f***ed away a large amount of money replacing a track motor. Now it's either had a terminal failure (in which case there's a chance of particles in the Hydraulic system and quite possibly causing issues) or they have'nt diagnosed the problem properly.

If it was my machine i'd spend some money on a proper plant engineer to come and look/test the machine and go from there.

Lad used to work for us had an auto 5 series BMW that wouldn’t go into gear, was told he needed new box and to write the car off cos would be too expensive to repair. Turned out to be a 50 pence piece stuck under the trim around the gear lever

 

[T whiting]

aye … fair comment Dave …… my 'Drema'd be a nightmare !!

Tell me about that my duck had 14 lines going from top to bottom the hydraulics bloke went what's that when he saw it

 

[wee_gus]

Check the undercarriage components, had a new case with a link out on one chain that did this, machine was spank new! So was very confusing for everyone! Dealer spent mega £££ fault finding with nothing sorting it

 

[Will123]

When you lift the machine up on one side the good track tracks the same speed both ways, the other track goes at same speed as the other in one direction but slowly in another.

 

[wee_gus]

When you lift the machine up on one side the good track tracks the same speed both ways, the other track goes at same speed as the other in one direction but slowly in another.

Swap the hoses around and see if it swaps the slow tracking direction

 

[V8Druid]

Check the undercarriage components, had a new case with a link out on one chain that did this, machine was spank new! So was very confusing for everyone! Dealer spent mega £££ fault finding with nothing sorting it

Tim'd have a field day on this one ……..
makes no odds …… the motors still run at equal speeds and lay down X amount of chain/links, per revolution … if the sprockets were differing sizes it would have an influence, but with equal numbers of teeth/circumference they will always run at the same feet/min, assuming the motors run at the same speed.

 

[V8Druid]

When you lift the machine up on one side the good track tracks the same speed both ways, the other track goes at same speed as the other in one direction but slowly in another.

could still be the rotary coupling, bleeding to another gallery