Komatsu WA380-6 Operation & Maintenance Manual page 311

HANDLING TORQUE CONVERTER LOCK-UP
TORQUE CONVERTER LOCK-UP SWITCH
This switch (1) is the control switch for the torque converter lock-up
function.
Position (a): ON
The pilot lamp inside the switch lights up and the
lock-up is actuated according to the travel speed.
While the lock-up is engaged, the lock-up pilot lamp
on the machine monitor lights up.
Position (b): OFF
The lock-up does not function.
TORQUE CONVERTER LOCK-UP PILOT LAMP
This monitor (2) lights up when the torque converter lock-up is
engaged and the transmission actually enters direct drive.
For details of (3) and (4), see "SHIFT INDICATOR (PAGE 3-26)" and "ACTION CODE DISPLAY (PAGE 3-9)" in the
section on the machine monitor in the OPERATION section.
6 - 4
ATTACHMENTS, OPTIONS