Komatsu D31EX-21, Operation & Maintenance Manual, Page: 91 / 256

OPERATION
EXPLANATION OF COMPONENTS
3-39
ANGLING CONTROL
Turn the knob to the right or left to angle the blade.
(g) LEFT ANGLE
(h) HOLD: Blade is stopped and held in this position.
(i) RIGHT ANGLE
REMARK
When performing only angling operation, be sure to set the
lever in the neutral (HOLD) position and turn the knob to the
right or left.
If the angling operation is performed while the lever is not in the
neutral (HOLD) position (while either or both of lifting and tilting
operations are performed), all of those operations can be con-
tinued, but the moving speed of the blade is lowered. Select
the operations according to the type of the work.
If the lifting or tilting operation is performed while angling oper-
ation is performed, the machine moves similarly to the above.
SAFETY LOCK LEVER
(for work equipment control lever)
WARNING
q
When leaving the operator's compartment, set the safety lock lever securely to the LOCK position. If
the safety lock lever is not at the LOCK position and the control levers are touched by mistake, it may
lead to serious personal injury.
q
If the safety lock lever is not set securely to the LOCK position, the work equipment may move and
cause serious injury. Check that it is in the position shown in the diagram.
q
When parking the machine or when carrying out maintenance, always lower the work equipment to the
ground, then set the safety lever to the LOCK position.
This lever (6) is a device to lock the work equipment control
lever.
When it is set to the LOCK position, the movement of the work
equipment is locked.
q
The blade control lever can move even when the lever is at
the LOCK position, but the control oil pressure of the blade
control is locked, so the blade does not move.
If the blade control lever is at the FLOAT position and the
safety lever is set to the LOCK position, the blade control lever
is automatically returned to the HOLD position.
REMARK
After the engine is stopped, even if the blade control lever is
operated, the blade will not move. Always lower the blade to
the ground and set the safety lock lever to the LOCK position
before stopping the engine.
Left angle Right angle
Free
Lock