Digger pipe work

[rooster cogburn]

Hello have a 2007 case cx80 digger how do I make the hammer line work a single action ram as in a post driver. So the ram returns free
Thanks in advance

 

[CPS]

Hello have a 2007 case cx80 digger how do I make the hammer line work a single action ram as in a post driver. So the ram returns free
Thanks in advance

Put it into hammer mode

 

[rooster cogburn]

Only a foot pedal pushed ram out but won’t let it back in

 

[rooster cogburn]

Protech post driver

 

[CPS]

The pedal needs to be double acting to move the spool both ways, which then needs the hammer line return valve to be returned to tank

 

[doobin]

You won’t need single acting for a post knocker. Or direct return to tank.

Sounds like there is something funny going on. Single acting should work just fine when you ‘release’ it- think of a tractor linkage going down with gravity. Double acting just means you’ll load the (unused) other side of the digger pipework up momentarily when you release the ram, but it’s such a small ram that this dead ending is a momentary blip before the weight hits home.

 

[Storrsy]

Hello have a 2007 case cx80 digger how do I make the hammer line work a single action ram as in a post driver. So the ram returns free
Thanks in advance

There will be a tap or valve somewhere either near the hyd tank or main valve block. Turn that and it should go into single acting. As Doobin said it should still work in double but it's not very nice as the pump is deadheading on the drop phase

 

[Storrsy]

Trying to remember where it was on my 2007 case cx75 which is very similar to what you have, I never needed to swap it. Think there's a little door/hatch just to the left of your king post as you stand looking at the cab from the front. Have a look around there and see if you can see anything