Komatsu PC1250-7 Operation & Maintenance Manual page 145

Hydraulic excavator
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MACHINE OPERATIONS AND CONTROLS
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.
3 - 92
OPERATION

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