Komatsu D155A-6 Operation & Maintenance Manual page 182

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OPERATION
GEARSHIFTING OPERATION USING PRESET MODE FUNCTION
Shift mode selection means that the selected speed range is displayed in the N position before starting.
When the joystick is in the N position, if UP switch (a) or DOWN
switch (b) is pressed, the shift mode selection can be carried
out.
F1-R1 mode
F1-R2 mode
F2-R2 mode
The selected shift mode is displayed on the speed range display
on the machine monitor.
Shift operation when F1-R1 mode is set
After this mode is set, when the joystick (steering, directional,
and gearshift lever) is operated to the front (FORWARD
operation), the speed range shifts to F1. When the lever is
moved to the rear (REVERSE operation), the speed range shifts
to R1.
Shift operation when [F1-R2] mode is set
When the steering, directional, and speed lever is in the N position, if the up switch is pressed once, the mode
is set to [F1-R2] mode. After that, if the steering, directional, and speed lever is operated forward (forward travel
operation), the transmission is shifted to F1. If it is moved back (reverse travel operation), the transmission is
shifted to R2.
Shift operation when [F2-R2] mode is set
When the steering, directional, and speed lever is in the N position, if the up switch is pressed twice, the mode
is set to [F2-R2] mode. After that, if the steering, directional, and speed lever is operated forward (forward travel
operation), the transmission is shifted to F2. If it is moved back (reverse travel operation), the transmission is
shifted to R2.
OPERATION
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