I'm having trouble locating the spline marks and the elevating arm locations on my 3 point hitch. (L3710 HST) The service manual tells you to line up the marks on the shaft and internal pivit arm that gotes to the piston. Darn if I can find the alignment marks. Any idea so I don't have to remove it a variety of times to get it right. The piston rod actuator shaft and the internal lift arm has to be in the correct location to get proper lift arm movement. Dealer mechanics we of no help. Thanks in advance. Steve