Komatsu D475A-5E0 Operation & Maintenance Manual page 185

OPERATION
OPERATION
AUTO SHIFT DOWN OPERATION
If the travel speed has gone down because of the load condition
when traveling, the transmission is automatically shifted to low
speed. Set auto shift down switch (2) on the instrument panel in
front of the operator's seat to the b (ON) position to actuate the auto
shift.
OFF position (a): Automatically canceled
ON position (b): Automatically shifted down to lower speed range
The transmission is automatically shifted down F2→ F1, F3 →
F2, R2 → R1, R3 → R2.
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