Type of Hydraulic Fluid

[Powell Skid Steer & Landscaping]

What type of hydraulic fluid for 1979 GMC 6000 Series Dump Truck. Thank you

[Gravel Rat]

I suppose you are talking about the hoist if so use 32 or 46 grade oil it doesn't really matter if you have a hoist that leaks and spews hydraulic oil all over the ground consider buying cheap oil.