Komatsu Hydraulic Excavator PC400-5 MIGHTY

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)

24.2.1 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 found 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 and installed after cleaning?

24.2.2 CLEAN INSIDE OF COOLING SYSTEM

Warning: This maintenance check requires trained personnel with PPE!

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

24.8.1 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

24.7.1 CHANGE OIL IN SWING MACHINERY CASE

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

Open the door on the right side of the machine.

Remove plug G and check the oil level.