Komatsu D31EX-21, Operation & Maintenance Manual, Page: 223 / 256

MAINTENANCE
SERVICE PROCEDURE
4-43
CHECK BRAKE PERFORMANCE 4
WARNING
If the machine moves during the following operation, please contact your Komatsu distributor for repairs
immediately.
Before starting the engine, check that the area around the
machine is safe, then do as follows.
1. Start the engine.
2. Set safety lock lever (1) to the FREE position then operate
blade control lever (2) to raise the blade.
Leave the safety lock lever to the FREE position.
3. Set parking lever (3) to the FREE position
4. Depress brake pedal (4) and move steering, directional
and gear shift lever (5) in 1nd.
5. Operate fuel control lever (6) to raise the engine speed
gradually to full throttle.
6. If the machine does not move with the above operation and
no error appears on the monitor panel, the brakes are cor-
rect.
Free
Lock
Free
Lock