Komatsu Hydraulic Fluid

Hi,

I have a 1994 Komatsu PC400-5 excavator in the western USA, rural area.

Trying to figure out what hydraulic fluid to use to top it off with. Recently had hydrualic fluid changed at dealer.

The manual says 10wt.
The dealer says 10wt, 10w-30 or 15-40 motor oil, not aw46
My service ticket under hydraulic fluid says "70 gal HO46" - but thats NOT 10wt motor oil... ?!!?
This doc seems to indicate it needs to be motor oil, AND HAVE DIESEL CD OR BETTER CERT, not aw46 (see esp page 10 ):...

Komatsu Hydraulic Fluid

Komatsu Hydraulic Fluid