Komatsu Hydraulic Excavator PC400

Warning: This maintenance check requires trained personnel with PPE!

Carry out the following maintenance only after the first 250 hours.

Fuel filter cartridge replaced?

Engine valve clearance checked and adjusted?

For details of the method of replacing or maintaining, see the section on EVERY 500 HOURS and 2000 HOURS SERVICE.

Sign off on the initial 250 hours hydraulic excavator maintenance

24.2.1 CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT

Is the red piston visible in the transparent position of the dust indicator?

Is the air cleaner body interior and the cover clean?

Are there small holes or thinner parts on the element after cleaning?

Are the folds or gasket or seal of the element damaged?

Is the cleaned element installed and fixed with the wing nut?

Are the seal washer or wing nut broken?

Is the evacuator valve clean after cleaning?

24.2.2 CLEAN INSIDE OF COOLING SYSTEM

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.

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

Check Swing Pinion Grease Level, Add Grease

Clean and Inspect Radiator Fins, Oil Cooler Fins

Sign off on the 500 Hourly Hydraulic Excavator Maintenance