Komatsu WA380-8 Operation & Maintenance Manual page 172

EXPLANATION OF COMPONENTS
MANUAL SHIFT
A desired gear speed can be selected from the 4 forward and 4
reverse gear speeds by turning the gear speed switch to that
gear speed position.
Use the 1st and 2nd gear speeds for work and the 3rd and 4th
for travel.
Position (a): 1st speed
Position (b): 2nd speed
Position (c): 3rd speed
Position (d): 4th speed
AUTOMATIC SHIFT
The gear switches automatically among 1st to 4th gear speeds
in each travel direction, depending on the travel condition.
Position (a): 1st speed
Position (b): 2nd speed
Position (c): 3rd speed
Position (d): 4th speed
The table shows the range of the gear speed that is automati-
cally shift by the gear speed switch position.
Gear speed switch position
2nd
3rd
4th
REMARK
• If the gear speed switch is set to the 1st position, the gear
speed is fixed to the 1st speed. The gear speed is not shif-
ted automatically.
• The gear speed is shifted automatically between the set
gear speed of the switch and 2nd, depending on the travel
speed.
The gear speed is shifted down from the 2nd to the 1st by
pressing the kickdown switch of the boom control lever.
• When the auto-shift and auto-kickdown are available, if the
travel speed is 10.5 km/h or slower, the kickdown switch
operates and the gear speed can be shifted down to 1st
from any gear speed of the forward or reverse travel.
This function facilitates the load-and-carry operation.
• When the travel speed is higher than 10.5 km/h, the gear
speed is lowered by one level each time the kickdown
switch is pressed in the order of F4, F3, and F2 while the
gear speed switch is in F4, and in the order of F3 and F2
while the gear speed switch is in F3.
3-108
Gear speed
1st ⇔ 2nd
1st ⇔ 2nd ⇔ 3rd
1st ⇔ 2nd ⇔ 3rd ⇔ 4th
OPERATION