Sounds reasonable to me Grumpy, but, the HYDRO manual says you can use-
1. premium hydraulic oil
2. engine crankcase oil - SAE 10w, SAE 20w-20, SAE 30
3. Automatic Transmission Oil
4. Hydraulic Transmission Oil
5. Synthectic fire resistant fluid (with a heap of different brands.
Then it states:
The preferred fluids for all light duty trans, pumps, transaxles and motor axels are those having a viscosity equiv to SAE 20W-20, SAE 30 or SAE 40.
From that, i think that SAE30 shoould be fine. Nothing mentioned about SAE90 in HYDRO PUMP, SAE90 is in the TRANSMISSION. Thanks for your input again though.
