Komatsu Hydraulic Excavator PC400LC-5 MIGHTY

24.7.1 CHANGE OIL IN SWING MACHINERY CASE

WARNING: The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before carrying out maintenance.

Set an oil container under drain valve P under the machine body.

Loosen drain valve P under the body, drain the oil, then tighten the drain valve again.

Add the specified amount of engine oil through gauge hole G.

After refilling, install bleeding plug 1.

24.7.2 CHECK OIL LEVEL IN DAMPER CASE, ADD OIL

WARNING: The oil is at high temperature immediately after the machine has been operated. Wait for the oil to cool down before carrying out maintenance.

1. Set the work equipment in the greasing posture below, then lower the work equipment to the ground and stop the engine.

2. Using a grease pump, pump in grease through the grease fittings shown by arrows.

3. After greasing, wipe off any old grease that was pushed out.

1. Boom cylinder foot pin (2 points)

2. Boom foot pin (2 points);3. Boom cylinder rod end (2 points)

4. Arm cylinder foot pin (1 point)

5. Boom-Arm coupling pin (1point)

6. Arm cylinder rod end (1 point)

24.8.1 CHANGE OIL IN FINAL DRIVE CASE

Set the UP mark at the top, with the UP mark and plug P perpendicular to the ground surface.

Set a container under plug P to catch the oil.

Remove plugs (P) and (E) with the handle and drain the oil.

Check the O-rings in the plugs for damage. If necessary, replace with new ones.

Add engine oil through the hole of plug F.

When the oil overflows from the hole of plug (E. install plug E. Tightening torque of plugs P and E: 70 ± 10 Nm (7 ± 1 kgm, 50 ± 7 lbft)

24.8.2 CHANGE OIL IN HYDRAULIC TANK, CLEAN STRAINER

24.5.1 CHECK OIL LEVEL IN FINAL DRIVE CASE, ADD OIL

The oil is at high temperature immedlately after the machine has been operated. Wait for the oil to cool down before starting the operation.

If there is still pressure remaining inside the case, the oil or plug may fly out.

Loosen the plug slowly to release the pressure.

1. Set the TOP mark at the top, with the UP mark and plug perpendicular to the ground surface.

2. Remove plug F using the handle. When the oil level reaches a point 10 mm below the bottom of the plug hole, the correct amount of oil has been added.

3. If the oil level is too low, install plug F, operate the travel levers, and drive forward or in reverse to rotate the sprocket one turn.

Check for clogging of the drain hole

If any abnormality is found, contact your Komatsu distributor for disassembly and repair or replacement.

Sign off on the water pump check