for you machine delo torqforce 30 and 50 are suitable for the trans and final drives respectively the oil clutch if fitted also takes 30 weight the torque force range has cat to-4 & to-4m approvals. can use torque force 10 in the hydraulics but in environment temps over 40 deg celcius must use engine oil or torqforce 30
delo gold 15w40 is suitable for the engine.(may have changed name)

the original delo oils were developed by standard oil co. for caterpillar. Diesel Engine Lubricating Oil