3-9
DX380LC-7
Hydraulic System Warm-up
The correct operating temperature of the hydraulic oil is 50° -
80°C (120° - 175°F). Make sure to follow the procedures listed
here for hydraulic fluid warm-up.
1.
Run engine for approximately five (5) minutes set at the
middle of the speed range, without a load.
2.
Move safety lever to "UNLOCK" position.
3.
Slowly cycle boom, arm and bucket cylinders about five
times without a load to circulate the oil through the system.
Do this for five (5) minutes.
4.
Check for clearance and fully raise the front attachment.
Swing clockwise three (3) revolutions.
Swing counterclockwise three (3) revolutions.
5.
Travel forward and reverse at low speed for two (2)
revolutions of the drive sprocket.
Hydraulic System Warm-up – Cold
Weather
1.
Run engine at "LOW IDLE" (no load) for five (5) minutes.
2.
Run engine for approximately five (5) minutes set at the
middle of the speed range, without a load.
3.
Move safety lever to "UNLOCK" position.
4.
Slowly cycle boom, arm and bucket cylinders about five (5)
times without a load 4o circulate the oil through the system.
Do this for five (5) minutes.
5.
Set engine speed control dial to "HIGH IDLE".
6.
Repeat Step 4 for five (5) minutes. If working speeds
continue to be slow, continue to operate but use extreme
caution because machine function may be erratic.
7.
Check for clearance and fully raise the front attachment.
Slowly swing clockwise three (3) revolutions. Slowly swing
counterclockwise three (3) revolutions.
8.
Travel forward and reverse at low speed for two (2)
revolutions of the drive sprocket.
NOTICE
If a problem or abnormal operation occurs, immediately
stop engine. Allow excavator to reach normal operating
temperature before starting work, especially in cold
weather.
Figure 4
FG018384
Figure 5
FG018384
