Doosan D20S-5 Operation & Maintenance Manual page 202

Maintenance Section
3. Remove the floor mat and the floor plate.
Remove and discard the oil filter.
4. Wipe off the filter base. Make certain that all of
the old seal is removed.
5. Apply a small amount of clean oil on the seal of
the new filter.
6. Install the filter by hand. When the filter
contacts the base, tighten an additional 3/4
turn.
7. Remove the dip stick/filter cap. Fill the
compartment with oil. See "Refill Capacities".
Install the dip stick/filter cap.
8. Start the engine.
9. With the service brake applied and engine at
low idle, shift the direction control lever to
forward and reverse to fill the clutches.
10. Shift the direction control lever into NEUTRAL.
Engage the parking brake.
11. Remove the dip stick/filter cap. Observe the oil
level.
12. Maintain the oil level between the Min and Max
marks on the dip stick/filter cap.
When the oil temperature is 40°C approximately,
the cold side mark on the dipstick is applicable.
When the oil temperature is 80°C approximately,
the hot side mark on the dipstick is applicable.
13. Check for oil leaks at the filters and drain plug.
14. Stop the engine. Install the floor mat and floor
plate.
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