Rock machinery. Venom log splitter thoughts/experiences

[ardenbarrett]

I have the 20 tonne three point linkage one. Have owbed for two years and it's been spot on. My only issue is the tractor is use isn't big enough and has a slow oil pump so the ram is very slow. If I had acess to a bigger tractor it would be spot on 

[slasherscot]

2 hours ago, ardenbarrett said:

I have the 20 tonne three point linkage one. Have owbed for two years and it's been spot on. My only issue is the tractor is use isn't big enough and has a slow oil pump so the ram is very slow. If I had acess to a bigger tractor it would be spot on 

can u not try and use an external pto hydraulic  pump ......old tractor hydraulics are usually too slow

[ardenbarrett92]

can u not try and use an external pto hydraulic  pump ......old tractor hydraulics are usually too slow

I had thought about this but wouldn't know where to begin. Would I need an oil tank and filter assembly aswell as a pto pump?

[openspaceman]

24 minutes ago, ardenbarrett92 said:

I had thought about this but wouldn't know where to begin. Would I need an oil tank and filter assembly aswell as a pto pump?

Not necessarily as long as your pto pump draws no more than the linkage pump. Plumb the  feed for the pto pump into as close to the point the  hydraulic return from the system goes back into the transmission  using a pipe at least as large  as large as the return pipe, take the high pressure from the  pto pump and Tee into the supply to the spool block. have a non return valve in this line and a pilot operated relief valve back into tank set at a slightly lower pressure than the linkage pump. This last bit is to protect the linkage pump and is not strictly necessary as the main relief in the spool block should blow. Make sure the spool block is fully capable of taking both flows or else everything will get very hot. Also the return to the transmission oil must have no restrictions and be to below the  oil level else the pto pump will be sucking air. It must not be via an auxillary spool block

 

An extra return filter is always a good idea.

[difflock]

OSM, Not intending to sound cheeky, but how could a PTO pump be any "faster" if it "draws no more" than the tractors integeral pump for the linkage?

oil flow is oil flow.

Regards,

Marcus

 

[openspaceman]

5 hours ago, difflock said:

OSM, Not intending to sound cheeky, but how could a PTO pump be any "faster" if it "draws no more" than the tractors integeral pump for the linkage?

oil flow is oil flow.

Regards,

Marcus

 

 I was siamising the PTO pump and linkage pump, so if they are the same size flow doubles. If you go any bigger with the PTO pump then you need to suck oil out of the gearbox and cooling could become an issue as the main flow is then  circulating and only the linkage flow portion  is returning to the tractor transmission housing. You really need the contents of the reservoir/transmission to be double the flow per minute for cooling and to allow any air bubbles to settle. Not causing any foaming is the reason all oil should be returned below the surface of the oil.

[difflock]

Ah!, he said, in hindsight, an ah fink the key word in your explanation was "siamising"= BINGO.

so

Thank you.

Marcus, the better informed.

[openspaceman]

20 hours ago, difflock said:

Ah!, he said, in hindsight, an ah fink the key word in your explanation was "siamising"= BINGO.

so

Thank you.

Marcus, the better informed.

I have drawn a little schematic: