The quick answer is that you simply drain and replace it, but where exactly the drain plug is will depend on the make and model. I could probably answer this question better if I had that information.
In the hydraulic oil tank. Where that's located depends on which model of backhoe you have.
hydraulic oil,AW-300
The primary type of hydraulic oil used in case backhoes is 10wt or AW-46. Each type has specific properties for longevity, performance, and resistance to harsh temperatures.
Left side front hood, unden a lift panel in front of the radiator...
The owner's manual for Oakes Man. L600 recommends using SAE30 motor oil in the chain cases.
oil will not evaporate as quickly as hydraulic fluid even though hydraulic fluid does not evaporate easily therefore you will not have to change the oil as often
The fuel (typically diesel), coolant, hub oil, lubricating grease, transmission fluid, hydraulic oil. If it has an AC system, you could count the AC refrigerant, as well.
where is the drain plug for hydraulic fluid on 743 bobcat
Hydraulic oil is very thin and will leak if it gets a chance. It does not burn out but after several hundred hours it may start to disappear Your transmission oil might leak into the engine or the rear end due to bad seals, however you have to determine how much oil you are using over what period of time. you will use some oil thru normal running conditions ,but not very much.
The manual says 8 quarts or 7.6 liters of case TCH fluid ,you can use Hy-tran Ultra hydraulic fluid. I use the hydraulic transmission fluid from tractor supply and have no problems.
Hydraulic fluid and hydraulic oil are one in the same.
where is oil cap