hydraulic drive for small wood chipper

[Bloders]

we have a Timberwolf 150mm wood chipper which is driven from tarctor PTO.
We owuld like it on the front links, so the obvious answer is to have a front PTO...

Alternatively, we could drive it with a hydraulic pump.
Any ideas on this?
My reckoning is it may need a fair bit of power (say 40hp) so would need a pump, motor and hydraulic tank from something like a hedgecutter.

Any other thoughts on it please?

 

[Stock]

Do Timberwolf not have a hydraulic driven one available??

 

[grainboy]

Have this hydraulic power pack available

 

[Bloders]

Have this hydraulic power pack available

do you have any more pictures and a price?

 

[Mursal]

Small well balanced Kubota (or Deutz air cooled) donkey engine?

 

[grainboy]

More pictures, price £450 plus vat, previously a power unit for front mounted Haulm chopper,

 

[Stock]

Shoot if you were closed to me I have it................................

 

[Bloders]

More pictures, price £450 plus vat, previously a power unit for front mounted Haulm chopper,

am i right in thinking it has a pump (shown in the picture) a hydraulic tank and then on the other side of the plate with 4 holes in it there is a hydraulic motor?
what is the pipe with the quick release coupler for?
thanks

 

[grainboy]

Evening yes Pto pump, Quick release are the Flo / return pipes, will double check tomorrow about motor,

 

[Mr Happy]

we have a Timberwolf 150mm wood chipper which is driven from tarctor PTO.
We owuld like it on the front links, so the obvious answer is to have a front PTO...

Alternatively, we could drive it with a hydraulic pump.
Any ideas on this?
My reckoning is it may need a fair bit of power (say 40hp) so would need a pump, motor and hydraulic tank from something like a hedgecutter.

Any other thoughts on it please?

Yes the easiest fix is to drive the chipper with a front pto simple and cheap. Unless you don't have a front pto. It can be worked out what sort of system you require to run the chipper at say 540 rpm to achieve the 40hp. The other question is were are you going to mount the the extra hyd system on the tractor. I presume you will hang it on the rear three point linkage. It will be very interesting to see what the componant are in the pictures @ grain boy posted as they could very well be an economical way of finding your solution.

 

[Bloders]

thats the problem...dont have a front PTO at the moment

 

[Mr Happy]

thats the problem...dont have a front PTO at the moment

So I will work out what sort of hyd set up you require to achieve 40 hp at 540 rpm.

 

[Pheasant Surprise]

thats the problem...dont have a front PTO at the moment

Even if you had a front PTO, it may not be the solution to your problems, as most front PTO's will generally rotate contra to standard rear PTO....so counter-clockwise as you're looking at the tractor.

You'd need to be able to reverse the direction of the chipper PTO drive input. I don't know if you can easily do that on a Timberwolf. Not so easy to do on our Linddana TP230, so it always has to go on the back of the tractor

 

[ollie989898]

Surely it's better on the back being run in 540E or something... tractor engine barely know the chipper was there even on tickover, surely?

I do like those timberwolf things, had a tree surgeon over in the garden for a bit, I was surprised the thing would consume the thickness's it did!

 

[Pheasant Surprise]

Surely it's better on the back being run in 540E or something... tractor engine barely know the chipper was there even on tickover, surely?

I do like those timberwolf things, had a tree surgeon over in the garden for a bit, I was surprised the thing would consume the thickness's it did!

Mine wants driving at 1000rpm and depending on what you feed it, needs the ponies. The best thing about it is the hydraulic vari feed. The chipper slows down or stops the feed rollers as it senses the machine bogging down.

 

[Pheasant Surprise]

thats the problem...dont have a front PTO at the moment

So I will work out what sort of hyd set up you require to achieve 40 hp at 540 rpm.

I just did a quick fag packet hydraulic flow calculation while having my tea, how does this look?

Power requirement: 40 HP or roughly 30 kW
@ 1000 PTO rpm
Say 190 bar working pressure
External gear pump

Flow (LPM) x Pressure (Bar) / 600 x Efficiency = Power (kW)

Pump Type and Overall Efficiency
External Gear = 85%
Internal Gear = 90%

So...

30 / 0.85 / 190 x 600 = 111.45 litres / minute pump flow @ 1000 rpm

Pump displacement = 111.45 litres / 1000 = 111.45 cc

If the chipper wants running at 540 rpm PTO then the displacement for the motor is 111.45 litres / 540 = 206 cc

** Edit: corrected my dodgy maths!!

 

[Mr Happy]

Not wanting to stir the brow stuff but you should start at the hyd motor and work towards the pump.
So if you use the Parker F11-250 hyd motor to achieve the 540 rpm and 40 hp requirement. You will need a system flow of 140 lpm and system pressure of 145 Bar. However you will need 50 Hp from your tractor and a hyd tank which will hold a min capacity of 350 litres. So I reckon this is why Timberwolf have never built a hyd driven chipper, its quite costly compared to a PTO shaft. Now off to finish my tea.