Hello I have a Mf 135 its diesel with the three speed with hi & lo trans. The question I have is how to get the 3pt lift to work right? When I lift the handle to raise the lift nothing happens till you get about 3" from the top. Then it goes all the way up if you push it down then it wants to fall all the way down. Tried to dig my potatos with a middle buster but it was either all the way down or riding on top of the row. Is this normal? The other three tractors I have used start to lift as soon as you start to move the handle then stop raising when you stop . This tractor has two handles one round head one kinda square. This is the first MF tractor I have owned I love it except for this problem. Thanks.