AFTER STARTING ENGINE 3

AFTER STARTING ENGINE

WARNING

If there has been any Emergency stop, abnormal actuation or trouble, turn the starting switch key to the OFF position. If the work equipment is operated without sufficiently warming the machine up, response of the work equipment to movement of the control lever will be slow, and the work equipment may not respond as the operator desires, so always perform the warming-up operation. Particularly in cold areas, be sure the warming-up operation is completed.

Warming-up Operation

NOTICE

When the hydraulic oil is at a low temperature, do not perform operations or move the levers suddenly. Always perform the warming-up operation. This will help extend the machine life.

Do not suddenly accelerate the engine before the warming-up operation is completed.

Do not run the engine at low or high idle continuously for more than 20 minutes. This will cause oil leaks from the turbocharger oil supply piping. If it is necessary to run the engine at idle, apply a load from time to time or run the engine at a mid-range speed.

REMARK If the hydraulic oil temperature is low, the hydraulic oil temperature monitor display will be white.

After the engine starts, do not start operating the machine immediately. First, carry out the following operations and checks. 1. Set fuel control dial (2) to a point midway between low idling (MIN) and full throttle (MAX), and run the engine at a mid-range speed under no load until the engine water temperature monitor enters the green display.

2. Set safety lock lever (1) to the FREE position and raise the bucket from the ground.

3. Operate bucket control lever (3) and arm control lever (4) slowly to move the bucket cylinder and arm cylinder to the end of the stroke. 4. Operate the bucket for 30 seconds and the arm for 30 seconds in turn fully for 5 minutes.

NOTICE When the work equipment is retracted, take care that it does not interfere with the machine body or ground.

5. After performing the warming-up operation, check and be sure all the gauges on machine monitor (6) and the caution lamps are in the following conditions: Radiator coolant level monitor (7): OFF Engine oil level monitor (8): OFF Charge level monitor (9): OFF Fuel level monitor (10): Green display Engine coolant temperature monitor (11): Green display Engine oil pressure monitor (12): OFF Engine coolant temperature gauge (13): Indicator in black range Fuel gauge (14): Indicator in black range Engine pre-heating monitor (15): OFF Air cleaner clogging monitor (16): OFF Hydraulic oil temperature gauge (17): Indicator in black range Hydraulic oil temperature monitor (18): Green display 6. Check for abnormal exhaust gas color, noise, or vibration. If any problem is found, contact your Komatsu distributor. 7. If air cleaner clogging monitor (16) lights up, clean or replace the element immediately.

For details of the method of cleaning the element, see "CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT (PAGE 4-19)".

8. Use working mode selector switch (19) on machine monitor (6) to select the working mode to be used.

Working mode monitor display 1) A mode For heavy-load operations

2) E mode

For operations with emphasis on fuel economy

3) Heavy-duty lift

Boom lifting power increased when raising boom independently

4) Swing priority mode

Priority given to swing when operating boom and swing simultaneously

In Cold Weather Areas

(AUTOMATIC WARMING-UP OPERATION) When starting the engine in cold areas, carry out the automatic warming-up operation after starting the engine.

When the engine is started, if the engine water temperature is low (below 30°C (86°F), the warming-up operation is performed automatically.

The automatic warming-up operation is canceled if the engine coolant temperature reaches the specified temperature (30°C (86°F) or if the warming-up operation continues for 10 minutes. If the engine coolant or hydraulic oil temperatures are low after 10 minutes, continue to warm the engine up as follows:

NOTICE

Do not suddenly accelerate the engine before the warming-up operation is completed.

Do not run the engine at low or high idle continuously for more than 20 minutes. This will cause oil leaks from the turbocharger oil supply piping. If it is necessary to run the engine at idle, apply a load from time to time or run the engine at a mid-range speed.

Never perform operations or operate the control levers when the hydraulic oil is still a low temperature. Always continue the warming-up operation until the hydraulic oil temperature monitor display is green.

This will extend the service life of the machine.

REMARK If the hydraulic oil temperature is low, the hydraulic oil temperature monitor display will be white.

1. Turn fuel control dial (2) to the medium speed position.

2. Set safety lock lever (1) to the FREE position and raise the bucket from the ground.

3. Operate bucket control lever (3) and arm control lever (4) slowly to move the bucket cylinder and arm cylinder to the end of the stroke. 4. Operate the bucket for 30 seconds and the arm for 30 seconds in turn fully for 5 minutes.

NOTICE When the work equipment is retracted, take care that it does not interfere with the machine body or ground.

5. After the warming-up operation is completed, check that each gauge and monitor lamp is in the following condition: Radiator coolant level monitor (7): OFF Engine oil level monitor (8): OFF Charge level monitor (9): OFF Fuel level monitor (10): Green display Engine coolant temperature monitor (11): Green display Engine oil pressure monitor (12): OFF Engine coolant temperature gauge (13): Indicator in black range Fuel gauge (14): Indicator in black range Engine pre-heating monitor (15): OFF Air cleaner clogging monitor (16): OFF Hydraulic oil temperature gauge (17): Indicator in black range Hydraulic oil temperature monitor (18): Green display

6. Check for abnormal exhaust gas color, noise, or vibration. If any problem is found, contact your Komatsu distributor.

7. If air cleaner clogging monitor (16) lights up, clean or replace the element immediately.

For details of the method of cleaning the element, see "CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT (PAGE 4-19)".

8. Turn fuel control dial (2) to the full speed (MAX) position and carry out the operation is Step 6. for 3 to 5 minutes. 9. Repeat the following operation 3 - 5 times and operate slowly.

Boom operation RAISE ←→ LOWER Arm operation IN ←→ OUT Bucket operation CURL ←→ DUMP Swing operation LEFT ←→ RIGHT Travel (Lo) operation FORWARD ←→ REVERSE

REMARK If the above operation is not carried out, then may be a delay in response when starting or stopping the actuation of the travel, swing, or work equipment.

10. Use working mode selector switch (19) on machine monitor (6) to select the working mode to be used.

Working mode monitor display 1) A mode For heavy-load operations

2) E mode

For operations with emphasis on fuel economy

3) Heavy-duty lift

Boom lifting power increased when raising boom independently

4) Swing priority mode

Priority given to swing when operating boom and swing simultaneously

NOTICE Canceling automatic warm-up operation If it becomes necessary in an emergency to cancel the automatic warm-up operation or to lower the engine speed to low idle, do as follows.

1] Turn fuel control dial (2) to the full speed (MAX) position and hold it for 3 seconds.

2] When fuel control dial (2) is returned to the low idle (MIN) position, the engine speed will drop.