Doosan DX700LC Operation And Maintenance Manual page 152

Hydraulic System Warm-up – Cold
Weather
1. Run engine at "LOW IDLE" (no load) for five minutes
(Figure 16).
2. Run engine for approximately five minutes set at the
middle of the speed range, without a load (Figure 17).
3. Set safety lever (1, Figure 18) on "UNLOCK" position.
4. Slowly cycle boom, arm and bucket cylinders about five
times without a load to circulate the oil through the system.
Do this for five minutes.
Operation
3-10
Figure 16
Figure 17
1
Figure 18
Figure 19
HAOB290L
HAOB410L
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