Volvo MC90 skid steer hydraulic fluid (also MC80 and MC110)

[craigc40]

I recently bought an '02 (or '03) MC90, but it didn't come with an operator's manual. Does anyone know what the hydraulic fluid is for the MC80/90/110? The previous owner said 30W oil, but I found in the technical service manual that they recommend 10W30 for lubricating o-rings when repacking a cylinder. It made me wonder if 10W30 is what I should be using for the hydraulic system. Also, I have a parts manual and a technical service manual, but tradebit.com does not seem to have operator's manuals. I'm having trouble finding any maintenance information for this machine. Any advice on where else to search?

 

[Tazza]

In the "olden days" all that was used was engine oil in the hydrostatic system, some people are concerned with additives that are in the oils, personally, i onlu use motor oil in my machines.
If the machine was under warranty, go OEM only, but as this one is a good 14/15 years old, that is not an issue.