I am in a quandry, I own a 1982 Mitsubishi BD2F Dozer my service manual specifies SAE 10W motor oil API cd/cc rating for the hydraulics. These oil ratings have long been outdated and the current oils are all High Detergent oils which are not recomended for use in hydraulic systems.
I have been getting conflicting info from several sources recomending I use ISO 68 Hydraulic oil another recomends I use non detergent 10W oil(which carries an API SA rating). I was considering using universal hydraulic fluid with 10W-20 weight rating. I have recently rebuilt several parts of the system (ie: new seals in cylinders and lines). Would hydraulic fluid be a good choice considering the age of the system? Thanks for any useful input and opinions.
Hard work Never Hurt Anyone