Tightening Hydraulic Fittings

[KyMadMan]

Does anyone know if there is a standard for tightening the hydraulic lines to fittings on the 753? Specifically one the hydraulic pump, hydrostatic pump, and control valve? I'm ass u me ing that the fittings with the nut lock down are to be inserted as far as possible and angled to what is needed to make clearance and connections, then the lock down is tightened to compress the o-ring seal. But, how tight should this be? Can it be over tightened that would lead to seal failure? If anyone has the hydraulic service manual for this unit and would like to share I'd be most appreciative.

 

[flyerdan]

This is out of a 773 book, but I'd imagine that the values would be the same for like components.

 

[KyMadMan]

This is out of a 773 book, but I'd imagine that the values would be the same for like components.

Thanks Flyerdan, I must have missed that in my manual. (Ok, maybe I didn't look in the right place or hard enough) I had seen the mark the flat technique though.