III-48
MACHINE CONFIGURATIONHYDRAULIC SYSTEM
Function
1. This tank stores the quantity of hydraulic oil
necessary to operate the cylinders and hydraulic
motors.
2. It keeps air, moisture and dirt out of the hydrau-
lic oil.
3. It dissipates heat and lowers the oil tempera-
ture.
4. Volume of Hydraulic Oil.
Check the oil level with the arm cylinders and
bucket cylinders fully retracted and with the
bucket cutting edge lowered to the ground.
Reference
If the amount of hydraulic oil is insufficient, the dis-
turbances in the flow of oil can not be calmed, and
this will result in air bubbles getting in the hydraulic
oil. If these bubbles are sucked into the hydraulic
pumps, they could cause cavitation. Heat dissipation
time would also become shorter and would result in
a rise in the oil temperature.
If more than the specified amount of hydraulic oil is
supplied, the amount of air in the tank will become
small and changes in the oil level could cause the
pressure fluctuation in the tank to become severe.
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