Komatsu D31EX-21, Operation & Maintenance Manual, Page: 220 / 256

SERVICE PROCEDURE
MAINTENANCE
4-40
CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL 4
WARNING
q
The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool
down before starting the operation.
q
If there is still pressure remaining inside the case, the oil or plug may fly out.
Loosen the plug slowly to release the pressure.
q
Prepare a handle.
1. Set the TOP mark at the top, with the UP mark and plug (P)
perpendicular to the ground surface.
2. Using the handle, remove plug (F). If the oil is up to the bot-
tom of the plug hole, the level is correct.
3. If the oil level is low, check again. Install plug (F), and oper-
ate the steering, directional and gear shift lever to drive the
machine forward or in reverse to rotate the sprocket one
turn. Then repeat the procedure in Step 2 to check the oil
level again.
4. If the oil level is low, add oil through the hole of plug (F).
Add oil until oil overflows from the hole of plug (F).
5. After checking, install plug (F).
Tightening torque: 68.6 ± 9.8 N·m (7 ± 1 kg·m)