Komatsu D155AX-8E0, Operation & Maintenance Manual

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Move joystick (steering, directional and gear shift lever) (1) to
the desired speed range to shift gears.
METHOD FOR SHIFTING GEARS
Shift the gear by pressing switches (a) and (b).
Up switch (a): The gear is shifted up by 1 step each time this
switch is pressed.
Down switch (b): The gear is shifted down by 1 step each time
this switch is pressed.
The speed ranges are as follows.
Automatic gear shift mode: 1, 2, 3L, 3 (4 forward, 4 reverse)
Manual gear shift mode: 1, 2, 3 (3 forward, 3 reverse)
For the maximum travel speed in each speed range, see
“SPECIFICATIONS (5-2)”.
REMARK
When the gear is shifted, the current speed range is displayed
in the speed range display section of machine monitor (2).
For examle,
Neutral: “N” is displayed in the speed range display section.
Forward 2nd: “F2” is displayed in the speed range display sec-
tion.
Reverse 3rd: “R3” is displayed in the speed range display sec-
tion.
When the parking brake lever is locked, “P” is displayed.
OUTLINE OF GEAR SHIFT MODE
There are automatic shift mode and manual shift mode in the gear shift mode. Select the mode to match the
use.
Automatic shift mode
Mode for general dozing work. The speed range is shifted down automatically when the load increases, and
shifted up to the set maximum speed range when the load decreases. The torque converter lockup operates
and the optimum speed range is selected automatically, according to the load. This mode is excellent in fuel
economy and production.
Manual shift mode
A mode for dozing and ripping of rough ground. When the auto shift down is ON, if a load is applied, the speed
range automatically shifts down, but when the load is removed, the speed range does not automatically shift up.
When the automatic downshift is OFF, the speed range must be shifted up and down manually. Select the Auto
Shift Down in the customize mode.
OPERATION MACHINE OPERATIONS AND CONTROLS
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