1) Unscrew 1 fixation screw, and then remove
the joystick handle by pulling it up.
2) Remove the measurement switch by pulling it to the direction B.
3) Remove the hexagon nut which fixes the measurement switch,
and then remove the measurement switch.
4) Remove the harness connected to the terminal of the
measurement switch (remove the heat shrinkable tube and
solder)
5) Fix new measurement switch and reconnect the harness.
(Connect the No. indicated on the measurement switch with the C
terminal. Make sure to reconnect the heat shrinkable tube.)