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Manual machine warm up
A manual machine warm-up can be carried out referring to the following procedure:
1.
Set the engine speed throttle three steps over the low idle position.
2.
Start the engine and let it run approximately for 5 – 10 min with no load.
3.
When the coolant temperature reaches the second segment on the coolant temperature gauge, set the engine
speed throttle in intermediate position.
4.
Push the gate lock lever forward (the safety bar is facing outward).
5.
Move the bucket control slowly until the bucket is fully curled.
6.
Operate the arm until the it is completely retracted, and hold the position for 30 s.
7.
Extend the arm completely, and hold the position for 30 s.
8.
Repeat the sequence of extending and retracting the arm until the temperature of the hydraulic fluid raises over
the first two segments on the hydraulic temperature gauge, corresponding to 25 °C (77 °F).
NOTICE: Never overload the hydraulic system until the temperature of the hydraulic fluid reaches 25 °C (77 °F).
If the hydraulic system is overloaded with the temperature of the hydraulic fluid below 25 °C (77 °F) it will be
severely damaged.
9.
Gently operate the controls for travel, front equipment and swing for 3 to 4 times to circulate warmed hydraulic
fluid into the whole circuit.
Check the followings after reaching normal operating temperature of the fluids:
• Exhaust gas is normal.
• No unusual noise or vibration.
• No leak of oil, fuel or water.
• No unusual noise when activating the hydraulic equipment.
• Inspection of the horn, buzzer, working lights and instrument cluster.
• Proper display of the temperature gauges.
• Check the visibility from the rear view mirrors, the side view mirrors and the cameras before operation. Adjust and
clean up dirt as necessary.
• Check each operation (travel, front equipment and swing).
If any of the following occurs during the warm-up procedure, stop the engine immediately.
• Engine speed increases or decreases rapidly.
• Engine sound and exhaust gas color are abnormal.
• Messages are displayed, and a warning alarm sounds.
4 - OPERATING INSTRUCTIONS
4-6
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