Adjusting proportional valve control on Doosan DX140-3

[Muckster]

I've recently bought a tilting bucket for the 14t, and no matter what i do to the flow settings the control sensitivity is terrible! There seems to be a huge dead spot on the thumb control, and very little tolerance between 0 and 100% of flow, which all happens within the last 20% of the control radius. I hope that makes sense!

Any ideas?

 

[V8Druid]

I've recently bought a tilting bucket for the 14t, and no matter what i do to the flow settings the control sensitivity is terrible! There seems to be a huge dead spot on the thumb control, and very little tolerance between 0 and 100% of flow, which all happens within the last 20% of the control radius. I hope that makes sense!

Any ideas?

'praps it's the thumb wheel at fault?

 

[CPS]

I've recently bought a tilting bucket for the 14t, and no matter what i do to the flow settings the control sensitivity is terrible! There seems to be a huge dead spot on the thumb control, and very little tolerance between 0 and 100% of flow, which all happens within the last 20% of the control radius. I hope that makes sense!

Any ideas?

The ramps can be changed but I'm guessing its a dealer laptop job.

 

[T whiting]

Stick some flow restrictors in the line

 

[Mark]

Stick some flow restrictor on it, we’ve had plenty of doosans over the years and always had to fit them on the tilting ditching buckets. If the machine is a -3 you can also turn the pressure and flow down via the computer.

 

[Muckster]

Stick some flow restrictor on it, we’ve had plenty of doosans over the years and always had to fit them on the tilting ditching buckets. If the machine is a -3 you can also turn the pressure and flow down via the computer.

I took flow restrictors out, and the flow adjustment makes very little difference unfortunately.
There’s just no sensitivity on the thumb control, all or nothing.

 

[Muckster]

'praps it's the thumb wheel at fault?

Maybe, I’ll see if I can change to the opposite controller without too much hassle.

 

[Mark]

I took flow restrictors out, and the flow adjustment makes very little difference unfortunately.
There’s just no sensitivity on the thumb control, all or nothing.

I would add the restrictor a back on to each side of the bucket and screw them up to there max and work from there screwing them off until your happy with the speed.
This has always worked for me in the past 10 years of running doosans. We run 140’s 225’s 300’s 340’s 380’s it’s all the same with them all of nothing on the controls.

 

[Muckster]

I would add the restrictor a back on to each side of the bucket and screw them up to there max and work from there screwing them off until your happy with the speed.
This has always worked for me in the past 10 years of running doosans. We run 140’s 225’s 300’s 340’s 380’s it’s all the same with them all of nothing on the controls.

Ok thanks for the advice! I’ll try that. The restrictors are only basic ones that came with bucket, 1mm holes in a male male fitting. I’ll get hold of some decent restrictors first.