Komatsu GD555-5 Operation & Maintenance Manual page 312

MAINTENANCE
CHANGE OIL IN TRANSMISSION CASE, CLEAN STRAINER
The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the temperature
to go down before starting the work.
Refill amount of oil: 45 liters (11.88 US gal)
1. Set a container under the transmission case to catch the oil.
2. Remove drain plug (1).
To prevent the oil from spurting out, gradually loosen drain plug
(2).
3. After draining the oil, tighten drain plug (2) and install drain plug
(1).
Tightening torque
drain plug (1): 59 to 78.5 Nm (6 to 8 kgm, 43.4 to 57.9 lbft)
drain plug (2): 49 to 78.5 Nm (5 to 8 kgm, 36.2 to 57.9 lbft)
drain plug (3): 9.8 to 12.7 Nm (1.0 to 1.3 kgm, 7.2 to 9.4 lbft)
4. Remove drain plug (3) and drain the oil.
5. Remove bolt (4) to take cover (5) off, and take strainer (7) out
to wash it.
6. Remove all the dirt stuck to the strainer (7), then wash it in
clean diesel oil or flushing oil. If the strainer is damaged,
replace it with a new part.
7. Install strainer (7) after washing it, replace O-ring (6) of cover
(5) with a new one, install cover (5), and tighten bolt (4).
8. Pour in the specified amount of engine oil from oil filler (F).
9. After refilling, check that the oil is at the specified level. For
details, see "CHECK OIL LEVEL IN TRANSMISSION CASE,
ADD OIL (PAGE 4-49)".
10. Check that there is no leakage of oil from the transmission
case or oil filter.
WARNING
SERVICE PROCEDURE
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