Komatsu D155A-6 Operation & Maintenance Manual page 184

OPERATION OPERATION
Manual shift mode
Changing maximum speed range used when traveling
When traveling forward: Possible to change speed range used
to F1 - F3
When traveling in reverse: Possible to change speed range
used to R1 - R3
up switch (a): Each time it is pressed, speed range used goes up
one range
down switch (b): Each time it is pressed, speed range used goes
down one range
REMARK
F3L and R3L are speed ranges where the engine speed is controlled at 3rd and the speed range is set to a range
between 2nd and 3rd.
In automatic shift mode, if the maximum speed range has been changed when traveling, return the steering,
directional, and gearshift lever to the Neutral position. The setting is changed to the maximum speed range set
before starting to travel (when the transmission was at neutral).
In manual shift mode, the preset (speed range when moving machine off) cannot be changed when the machine is
traveling.
NOTICE
Be careful not to come unnecessarily close to the edge of cliffs. When dropping soil at the edge of a cliff to build an
embankment or landfill, always leave one load and use the next load to push the previous load over.
When reaching the top of a hill, or at the instant when the load is dumped from a cliff, the load will suddenly drop and there is
danger that the machine will suddenly increase speed, so depress the decelerator pedal to reduce the speed when dumping
the load.
In automatic shift mode, when a load is applied, the transmission automatically shifts down; when the load is removed, it
automatically shifts up to the maximum set speed range. In manual shift mode, if a load is applied, the transmission
automatically shifts down, but when the load is removed, the transmission does not automatically shift up.
OPERATION OPERATION
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