Replace The Drive Unit Oil; Checking, Cleaning, Replacing The Interior Air Filter - Kubota U48-4 Operation Instruction Manual

Replace the drive unit oil

Only change the oil when the drive unit is warm to the hand; if not, drive the excavator warm.
Park the excavator on level ground so that the drain plug (figure below, position 3) is positioned at the bottom.
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Place a catch tray with a minimum capacity of 2 L under the drain plug.
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Remove the drain plug and let the oil drain completely. Install
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the drain plug with a new sealing ring on it.
Remove the oil filler plug (2) and oil level screw (1).
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Fill oil as specified in the "Recommended lubricants" section
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(page 159). The oil level is the lower edge of the thread.
Capacities: 0.9 L
Refit the oil filler plug and the set screw with a new sealing ring and tighten it.
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Perform the same service on the second drive unit.
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Checking, cleaning, replacing the interior air filter

If the excavator is operated in a particularly dusty envi-
ronment, the interior air filter must be checked more of-
ten.
Remove the screw (1).
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Open the cover plate (2).
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Remove the interior air filter (3).
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Checking
Inspect the interior air filter for contamination and damage. In
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case of heavy contamination, replace the interior air filter.
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Maintenance
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