The hydraulic reservoir for a Massey Ferguson 1533 is located on the left side of the tractor, directly in front of the operator’s seat. It is usually covered by a metal or plastic door for protection. The hydraulic reservoir holds tractor hydraulic fluid, which powers the tractor’s hydraulic system. The hydraulic reservoir will also contain a dipstick, which can be used to check the fluid level and ensure that the tractor has the correct amount of hydraulic fluid.