TROUBLESHOOTING

After Running Out Of Fuel Warning

When air bleed plug (1) at the top of the fuel filter head or supply pump air breather (5) are removed, the system is still under pressure, so fuel may spurt out. Loosen these parts slowly before opening them.

When starting after running out of fuel, fill the filter cartridge with fuel and bleed the air from the fuel system before starting.

Procedure For Bleeding Air

1.Remove the fuel filter cartridge, fill the filter case with fuel, then install again.

NOTICE

● The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection pump and nozzle, so problems may be caused by dust or dirt getting in. When carrying out inspection or maintenance of the fuel system, pay more attention than normal to the entry of dirt. If dirt is stuck to any part, use fuel to wash it off completely.

● If no clean fuel is available, bleed the air with priming pump (3) without removing the fuel cartridge.

● When filling with fuel, use clean fuel and be careful not to let any dust or dirt get in. Portion (B) at the center is the clean side, so be particularly careful not to let any dust or dirt get in.

● When adding fuel, always add from small hole (A) at eight places on the dirty side.

2.Loosen air bleed plug (1) at the top of the fuel filter head.

3.Push in the fuel cut knob (2) installed at the side of the steps on the left side of the machine to set so that fuel is supplied.

After pushing it in, fit wire lock (3) to fuel cut knob (2) to lock fuel cut knob (2) and prevent it from moving.

4.Loosen the knob of priming pump (5), pump the knob, and check that fuel comes out from air bleed plug (1). After checking, tighten the plug.

Tightening torque:7.8 – 9.8 N·m (0.8 – 1 kgf·m)

5.Open air breather (4) at the side of the supply pump, and pump priming pump (5) approx. 90 – 100 times. With this operation, fuel will start to overflow from air breather (4). When no more bubbles come out with the fuel, tighten air breather (4).

Tightening torque:4.9 – 6.9 N·m (0.5 – 0.7 kgf·m)

6.Pump the knob again several tens of times until it becomes stiff, then push in the knob of priming pump (5) and tighten it.

7.If the air is not bled properly, return to Step 4 and bleed the air again.

8.For normal starting operations, turn the key in the starting switch to the START position to start the engine.

Phenomena That Are Not Failures

Note that the following phenomena are not failures:

● When the arm is pulled in, the speed of movement will drop momentarily when the arm is more or less vertical.

● When the bucket teeth are almost horizontal, the speed of movement will drop momentarily.

● When starting or stopping the swing, noise will be emitted from the brake valve.

● When traveling down a steep slope at low speed, noise will be emitted from the travel motor.

● When starting or stopping the swing, noise will be emitted from the brake valve.

● When going down a steep slope at low speed, a noise will be emitted from the travel motor.

Towing The Machine Warning

● When towing the machine, use a wire rope that has ample strength for the weight of the machine that is being towed.

● Do not apply a sudden load to the wire rope.

If the machine sinks in mud and cannot get out under its own power, or if the drawbar pull of the excavator is being used to tow a heavy object, use a wire rope as shown in the diagram on the right.

Place pieces of wood between wire ropes and body to prevent damage to ropes and body.

Precautions On Particular Jobsites

● When carrying out digging operations in water, if the work equipment mounting pin goes into the water, carry out greasing every time the operation is carried out.

● For heavy-duty operations and deep digging, carry out greasing of the work equipment mounting pins every time before operation.

After greasing, operate the boom, arm, bucket, and blade several times, then grease again.