Combines Table drop

Does it happen enough to get it to act up on you nowIJ If it does or if you can get it to act up then unhook the header raise and or lower wire from solinoid to narrow down if it is hydralic problem or electrical.

Problem is very seldom, but general puts header into ground

sounds like you are unseating a poppet such as the cyl speeding up on its on except that the flow is keeping the seat open. Go to TIPS to your left there and click on it and then upgrades and look at the breakdown of the header lift valve. Remove the pole pieces and check for broken springs. Might try swaping raise with lower unit but keep seats in origional location as orfice size is diff. Remember you have a spare free poppet assy in the reverser block as only one side is used.

go to 'tip of the week' 8899 I belive. Talks about header lift valve and gives you a picture breakdown of this area