Komatsu ecot3 WA430-6 Operation & Maintenance Manual page 217

TRANSPORTATION
UNLOADING
1. Load and unload on firm level ground only. Maintain a safe distance from the edge of a road.
2. Apply the brakes on the trailer securely and insert blocks (1)
under the tires to hold the trailer in position.
Set the distance (3) between ramps (2) to match the distance
between the left and right tires, and make angle (4) of the
ramps a maximum of 15°.
If ramps (2) sag appreciably under the weight of the machine,
put wooden block (5) under the ramps to support them.
3. Remove the chains and wire ropes fastening the machine.
4. Set the frame lock bar to FREE position (F).
5. Start the engine.
Warm the engine up fully.
6. Check that the work equipment control lever is at the HOLD
position, then set the work equipment lock lever to the FREE
position (F).
7. Set the parking brake switch to OFF position (B) to cancel the
parking brake.
8. Determine the direction of the ramps, then drive the machine
slowly down the ramps to unload the machine.
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OPERATION