need to order top cover complete gasket-oring kit and cam follower pin for my 841.what supplier has the best quality.next question,is a real ford service manual available with correct specs for adjustment of the top cover links to spool valve.i have not been able to find real info -i know ford had special tools to set gaps but no dimensions.my first ford tractor -lots of info out there but sorting through all the different models is time consuming.i want to do the job correctly once.i also need real specs on the hydraulic tube through the trans.my tube broke and left the section in the hyd. housing.tube doesnt look original -i can mic the front and rear after split but need a real dimension for the center so still need to split the tractor to deal with that but meanwhile i am doing maintenance .any help appreciated.jim