EVERY 4000 HOURS MAINTENANCE 4

Check Electric Wiring

CAUTION

If fuses are frequently blown or if there are traces of short-circuiting on the electrical wiring, promptly ask your Komatsu distributor to locate the cause and make the repair. Keep the top surface of the battery clean and check the breather hole in the battery cap. If it is clogged with dirt or dust, wash the battery cap to clear the breather hole.

Check that there is no damage to the fuses; that fuses of the specified capacity are used; that there is no disconnection or trace of short-circuiting in the electric wiring and no damage to the covering. Check also that there is no loosened terminals. If any, tighten them. Moreover, pay particular attention to the electric wiring when checking the battery, engine starting motor and alternator. Be sure to check that there is no inflammable material accumulated around the battery. If any is found, remove immediately.

Check Function of Horn 1. Turn the starting switch to the ON position. 2. Press the horn switch and check that the horn sounds immediately.

Note that if the air tank is empty or the water drain valve in the air tank is at the OPEN position, the horn will not sound. Check that the water drain Valve is at the CLOSE position, start the engine and wait for 1 or 2 minutes, then press the horn switch again to check if it sounds.

If the horn still does not sound, please contact your Komatsu distributor for repairs.

Drain Water And Sediment from Fuel Tank NOTICE Never use trichlene for washing the inside of the tank. Use diesel fuel only.

1. Prepare a container to catch the fuel that is drained. 2. Tank drain hose (2) out through the hole in cover (3) . 3. Open drain valve (1) at the bottom of the aftercooler and drain the water and sediment gathered at the bottom of the tank together with fuel. When doing this, be careful not to get fuel on yourself. 4. When only clean fuel comes out, close drain valve (1).