Digger post drivers

[MikeW]

Hi all,

I have just bought a wrag post driver for the bobcat e45 digger and have been trying it out today. it runs through a valve block on the knocker through the double acting circuit. When I have the aux flow on low the weight doesn't come down quick enough but on medium (2) it seems fine but the controls are a bit savage. It says in the digger book it has a return to tank valve but I don't seem to have one.

I was just wondering how you ran yours and whether or not you need a free flow return and or will it do any damage to the machine like it is?

Thanks

Mike

[wfencing]

My last bobcat had a free flow return lever but e45 like yours does not. Dealer says ok . My protech on digger has no valve block just straight to ram and with proportional control works smoothly

[Goaty]

Id prefer a free flow, unnessary friction and heating of the oil and pressurising of components not a good idea although diggers are intended to jackhammer, it's known to be a stressor and wears them out. Shouldn't be too expensive or hard to retro fit a free flow. Don't forgot to oversize the return pipe bore.

[MikeW]

I have spoken to bobcat today and they say it has an automatic to tank valve as it is a later model so they said if I use the right auxiliary setting its all ok.

Thanks for your help

Mike