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Stephen Blair

Show us your Arb Diggers please.

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11 hours ago, monkeybusiness said:

Does anyone know how easy/hard it is to add an extra hydraulic pump to a digger engine for just this reason? 

Yes, its what we do for running mulching heads. Bolting the pump on is normally the easy bit, cooling, supply pipes and filtration are normally the biggest headache to locate/house.

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8 minutes ago, aspenarb said:

Yes, its what we do for running mulching heads. Bolting the pump on is normally the easy bit, cooling, supply pipes and filtration are normally the biggest headache to locate/house.

Do you just run a belt driven pump off the front Bob? Make up a bracket etc and nail it on it is it somehow sandwiched with the main engine driven pump? 
Doesn’t the digger’s existing oil-cooler keep up? I assume you use the same hydraulic tank (totally understand the reasoning behind additional filtration though). 

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40 minutes ago, youngsbury said:

Maybe a silly question but Is there any way to divert the high speed tracking hydraulic flow when switched on to provide extra flow to the head !! 

The high speed tracking we had worked on the standard flow but halved the number of pistons in use in the final drive, thus halving the torque but potentially doubling the speed. I imagine modern diggers use much more sophisticated variable displacement pumps.

 

You could put a priority flow valve in the circuit but these work on black magic and can overheat the oil unless they are positive displacement ones (which I have never seen used)

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On 16/09/2020 at 09:01, monkeybusiness said:

Do you just run a belt driven pump off the front Bob? Make up a bracket etc and nail it on it is it somehow sandwiched with the main engine driven pump? 
Doesn’t the digger’s existing oil-cooler keep up? I assume you use the same hydraulic tank (totally understand the reasoning behind additional filtration though). 

Engine driven if you can, size the pump to run flail/mulcher head at max rpm with engine at normal machine operating revs. Think about diffusers, coolers, oversized pipework, by pass, pressure relief valve ,solenoid valve and increasing oil capacity. What size machine is this for?

 

Bob

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8 minutes ago, aspenarb said:

Engine driven if you can, size the pump to run flail/mulcher head at max rpm with engine at normal machine operating revs. Think about diffusers, coolers, oversized pipework, by pass, pressure relief valve ,solenoid valve and increasing oil capacity. What size machine is this for?

 

Bob

Thinking about both a 2.5 and a 6 tonner tbh.

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Help my brother do some work on pipes on his digger can only think a nightmare of a job as not much space spare on a digger to fit extra stuff.  

 

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