Vaderstad drill problem

[copse]

just got the drill out as thinking about drilling some rape and when in transport position it is creeping down. Can’t see any obvious oil leaks and when in drilling position with rod pushing valve shut on ram it doesn’t creep. Any ideas what’s wrong with it ?

 

[Tim G]

Internal seal weeping?

 

[copse]

Don’t think it is as when depth rod pushes valve shut which is on top of ram it doesn’t creep.

 

[-chris-]

It can be caused by any of the marker/pre-em ram seals leaking from high pressure side to low pressure side of valve block. A crack inside the block or faulty solenoid?

 

[copse]

It can be caused by any of the marker/pre-em ram seals leaking from high pressure side to low pressure side of valve block. A crack inside the block or faulty solenoid?

Hadn’t thought of that sounds like it could take some tracking down.

 

[Boysground]

Check the valve block on the right of the hopper. They can play up.

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[-chris-]

Maybe blank off both pipes of each ram one at a time?