Komatsu H75051 Operation & Maintenance Manual page 168

EXPLANATION OF COMPONENTS
REMARK
If you release the emergency HST pump drive switch during traveling, the machine may stop abruptly.
Release the accelerator pedal, depress the brake pedal, and release the switch after the machine stops.
MAX. TRACTION SWITCH
With the Max. traction switch, the traction control or S mode is
canceled.
The traction control switch is used to turn on the traction control
or to select the S mode.
Press the Max. traction switch while the traction control is
turned on or the S mode is selected, then the traction control or
the S mode is canceled, and the maximum rim pull increases.
The traction level display on the machine monitor also goes
out. (The traction control operation pilot lamp or the S mode
operation display goes out.)
To turn on the traction control or the S mode again, press the
Max. traction switch or change the directional lever position.
REMARK
Use this switch to increase the rim pull further for the scrape-up work.
PCS (PROPORTIONAL CONTROL SWITCH)
(if equipped)
PCS (Proportional Control Switch) is used to operate the at-
tachment.
Position (A): Extend the left cylinder (retract the right cylinder)
Position (B): HOLD
Position (C): Extend the right cylinder (retract the left cylinder)
TRACTION CONTROL SWITCH
With the traction control switch, the traction control can be ac-
tuated and the maximum rim pull can be changed.
Press the position (A).
Each time the position (A) is pressed, the following 2 conditions are switched.
• Traction control is OFF (MAX).
• Traction control is ON ("Auto" or "Level 1" to "Level 5").
Press the position (A) and release your hand from it, it automatically returns to the position (B).
3-102
OPERATION