LT230 PTO Endurance limit?

Sales guy for the maxi drive said with increased revs you could push closer to 60hp. Flow rates for the Cross brand pump are cross referenced to rpm, from 1000 to 3000 so Kreecha's idea of 2000 would put him mid range with some extra capacity.

If they recon 60hp is ok, well........seems a lot tho.


So what is it? Firewood? Last 'real' one I played with didn't have a splitter (was using ex timber mill scantling), but used a input conveyer loaded via a Bell log handler, to feed into a harvesting head off a feller/buncher, cut to length via PLC control over the input conveyer, then onto a output conveyer to a stockpile or truck. Basically built with mostly leftover bits and driven with a 6-354 Perkins.......interesting project.

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Originally Posted by workingonit

If you have aircon and want to keep it then you have to use the power steering assist which is not high output, or the maxi drive off the trans case. And if you go maxi drive with the larger pump they supply, in a Disco, then you will also have to cut into the floor support - Defenders have a bit more room I understand, so no cutting the floor.

Sorry, meant to say all the other parts you require may also prove to be rather expensive - pressure relief block, oil tank, radiator, direction controller (maybe), lines etc. And if you are thinking of putting a hydraulic winch in, cause you've got most of the system already in the log splitter, then you are looking about 65kg with steel cable (and the cable is only a small part of that weight), and a hydraulic lock (can't remember the tech term) so that the winch is braked when it has a load on but not being driven.

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Hi,
I would no want to keep the AC. I am dreaming of building one of these 3000/4000 Bar Saw Firewood Processors (no loading deck) on a D1 chassis. Also means I do not have to worry about cutting the floor. There won't be a floor :D Or a body...

I agree all the other parts will be expensive. Plus maintenance.
Some parts I can make to reduce labour; hoses, tanks fabrication etc.
Some parts I have to buy; hydraulics (valves, valve block, PRV, Gg's, motors, rams etc), Chain.

Oh and you refer to weight. I had considered weight to be an issue, but loading a d1 chassis with 800kg of hydraulics and steel... Then a tonne of tree... I will make concessions :)

I'm pretty sure the hydraulic winch needs a closed centre spool to remain locked when not functioning.

Cheers, Adam.

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Originally Posted by Rick1970

My thoughts too.


Mite just be me, but I couldn't see in that site where they actually gave a max torque limit for their PTO. Its fine to say 11-115cc pump, but 115cc @ rev X 1000psi is very different to 115cc @ rev X @ 3000 psi.

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I agree. I have to continue my study to find a suitable setup.

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Originally Posted by Rick1970

In all seriousness, running 48kw from the PTO of an 18 speed roadranger takes very careful pto selection if you want it to last, exp when working with extended duty cycles. I would think they are a tad more robust than most LR offerings.

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Once again; I agree. To lessen your concern I aim to run 16kw off the front of the crank via a toothed belt to one pump, and 32kw through the t/case. That being said I have to be wary of many differing factors such as;
-over loading,
-oil condition,
-oil temperature,
-oil volume,
-additional t/case wear,
-engine glazing.

There is much more I must also be wary off, and I am happy to further explain if you desire however that is outside the scope of my initial query.

Cheers, Adam.

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Originally Posted by workingonit

What exactly are you going to inflict on the timber with this 'system'?

Hydraulic chain saw? Hydraulic circular saw for slabs? Mulcher? Rail based ram splitter? If you've already split the logs then what does the 'firewood processor' do?

Lathe:) ?

Not one of those machines with hydraulic boom, giant nippers, shreds all the branches and spits out a clean log!!

Are you picking up old fallen trees or cutting down new, or both?

I've cut down a few large trees, by NT standards, and found the back hoe on a tractor very useful for dragging, positioning, lifting and holding while dropping sections without the need for undercuts. A 'horse' might be useful.

Have you considered agrichar production?

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I hope the other link I posted previously assists with detailing what I want to achieve. That said....
I also want to include 2 hydraulic winches, a mulched, hydraulic steering, and a stump grinder.

:)

I will be sustainably felling forests designed for fuelwood production.

I have never heard of agrichar production. Googling.

Cheers :)

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Originally Posted by slug_burner

48 kW sounds like a fair bit to push out through the transfer case pto/splines a lot of heat to manage both on the engine cooling side and the hydraulics, good radiators/coolers and fans required.

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Hi Slug,
Heat is a concern.

Should be interesting. I've done a lot of research in the last 12mths regarding this subject, and it should be interesting to see how much more study I can do prior to finding a problem that is unmanageable.

Managing heat is (relatively) easy to conquer.
LT230 PTO drives not designed for outputting as much power as I require is a show-stopper.Luckily I haven't arrived there yet :)

Cheer's Adam.

Quote:

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Originally Posted by workingonit

Sales guy for the maxi drive said with increased revs you could push closer to 60hp. Flow rates for the Cross brand pump are cross referenced to rpm, from 1000 to 3000 so Kreecha's idea of 2000 would put him mid range with some extra capacity.

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I may yet have to go with the MaxiDrive unit. After all it can be sourced locally.

Cheers.

Quote:

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Originally Posted by Rick1970

If they recon 60hp is ok, well........seems a lot tho.


So what is it? Firewood? Last 'real' one I played with didn't have a splitter (was using ex timber mill scantling), but used a input conveyer loaded via a Bell log handler, to feed into a harvesting head off a feller/buncher, cut to length via PLC control over the input conveyer, then onto a output conveyer to a stockpile or truck. Basically built with mostly leftover bits and driven with a 6-354 Perkins.......interesting project.

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PLC's are abit above my desire of a full-mechanical-fluid power system.
However; I do realise the benefit of, and understand the simplicity of, wiring in a few limit switches to provide some and/or sequences.

I did google a perkins 6-354... I couldn't find an engine capacity. I could find power and torque though and they were almost identical to a 300TDI.

Thanks Rick for looking in.

Quote:

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Originally Posted by kreecha

Hi,



I'm pretty sure the hydraulic winch needs a closed centre spool to remain locked when not functioning.

Cheers, Adam.

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Closed centre spool valve is normally used in a system where no oil flow is desired through the valve in the neutral position, usually a closed circuit system using a load sensed/ pressure compensated piston pump or accumulator system.


Most, but not all, hydraulic winches tend to use some sort load holding (overcentre) valve on the motors work ports to stop the motor when there is no oil flow. With an open circuit system (common gear/vane pump), theory says use a motor spool ( both valve work ports open to tank when in neutral), but in most cases a standard cylinder spool ( both work ports closed in neutral) works ok.

Consider your heat carefully if your working in high ambient temps. Its generally accepted that the tank should be 3 times the oil flow (so 100l/min oil flow = 300L tank) which is usually quite hard to achieve in a mobile system. 1:1 should be workable if everything is sized to minimize unnecessary heat.


A lot of oil cooler manufactures won't warrant there coolers when used in curcuits containing hydraulic cylinders (spike pressures in return lines when retracting cylinders). Check valves across the cooler ports can sometimes be of help with this.