Doosan DX700LC Operation And Maintenance Manual page 163

Boost Mode
1. Power boost switch is used to gain maximum digging
force.
2. The power boost is activated while the lower button is
being pressed on top of the right-hand work lever
(joystick). The breaker / boost / shear selector switch must
be in the "O" (BOOST) position.
NOTE:
The power boost mode does not affect forward
and reverse travel.
Do not use this switch for more than ten
seconds.
Operation
I
O
I I
Figure 43 RIGHT-HAND WORK LEVER
(JOYSTICK)
FG000117
OP001122
3-21