What type of hydraulic fluid should I use in my Log Splitter ?

How much and what type of hydraulic fluid should I use in my Log Splitter ?
IMPORTANT! Never operate a log splitter without the appropriate amount of approved hydraulic fluid in the reservoir tank. Operating a log splitter without sufficient reservoir fluid in the hydraulic system may result in severe damage the hydraulic pump and would be reason to void the factory warranty.
DO NOT MIX DIFFERENT TYPES OF HYDRAULIC FLUIDS. Use only one type of an approved lubricant. If the type of fluid already installed in a unit is unknown, the recommended procedure is to drain that fluid completely and refill it with all of the same type fluid.
Our log splitters have varying fluid capacities depending on the model and style. Most units have either a 3.5 gallon, 4 gallon, or 7 gallon reservoir. Please refer to the appropriate product Operator's Manual to determine the capacity of the hydraulic reservoir of a particular model.
The approved fluids that our log splitter hydraulic systems may be filled with are:
Dexron III Automatic Transmission Fluid.
10W AW Hydraulic Oil.
Pro Mix AW-32 Hydraulic Fluid.
These fluids are all non-foaming hydraulic fluids and available from our Online Parts Store, most hardware stores, automotive supply, farm equipment retailers, and other major home improvement supply stores.
Keep in mind that the volume of the reservoir tank is less than the unit's total fluid capacity. Fluid also needs to be primed into the hydraulic system (hoses, filter, valve, pump & cylinder), which may require as much as an extra gallon when filling the complete system.
To prime the hydraulic system, fill the fluid to the appropriate level as instructed in your Operator's Manual. Disconnect the spark plug wire and ground it against the engine. Then pull the starter rope on the engine 10 to 15 times. This will allow the pump to push fluid into these other areas of the hydraulic system. Your reservoir level should go down, so you will need to re-check it and fill to the appropriate level.
Before splitting any wood, you should extend and retract the wedge at least 12 cycles* to remove any trapped air in the system. Again, check and fill reservoir log splitter for sale .