anti wear hydraulic oil gr vg-68, is: 11656-1986/ reaffirmed 2018 (with aniline point 90 deg. c. min for all grades in place of seal compatibility test and nas value below 8) with rdso additional requirement as slip no.1 issued by rdso on august 2016. drawing no. servo system hlp-68n of m/s ioc or its equivalent.
