I did adjusted the control spring like you said and also installed in back the same way you said.
Yes it lifts the plough clear up the ground where only the ferrow wheel was touching. After lifting, it drops it back 1-2 seconds. Can you please advise more on the bent frame.
Actually the pump frame where the control lever is attached, that frame was bent backwards towards the PTO, I have made it straight. Can it be the problem.
The initial problem with the system was that it was keep lifting and making the relief valve sound. Then the valve becomes stiff and we cant move to release. I changed the control valve and spool only. Should I change the O-rings also.
After I did the changes the pump works fine in lifting and maintaining positions. The only problem is that implement come off the ground with I plough.
Do you feel that I should bend the frame of pump (holding the control lever) like it was.