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OPERATION
Machine Push-up Switch
This switch (5) is used to switch the safety valve set pressure
at the head end of the boom cylinder to two levels.
(a) Low-pressure setting: The boom thrust force is weak, so the
swaying of the chassis is small during digging operations, and
digging operations can be carried out smoothly.
This is used for general digging operations on normal ground,
soft rock, or blasted rock.
(b) High-pressure setting: The thrusting force of the boom
becomes more powerful, so it is easy to escape from soft
ground.
Lower Wiper Switch
When this switch (6) is pressed, the lower wiper is turned on.
(a) ON: Lower wiper operates.
(b) OFF: Lower wiper stops.
Heated Seat
When the switch (7) is pressed, the heater will operate pro-
vided the ambient temperature is sufficiently low.
(c) ON: Heater operates. (see Note below)
(d) OFF: Heater stops.
Note: There is a temperature thermostat fitted in the seat cushion, the heater only operates when the temperature
is low (approx. 7° C or below).
Roof Wiper Switch
This switch (8) is used to turn on the roof wiper and to operate
the washer. The switch has 3 positions:
(a) ON: Is with the rear end of the switch down. The wiper is on.
(b) ON: Is with the rear end of the switch pressed and held
down. The wash/wipe is on.
(c) OFF: The wiper/washer system is off.
1. Nozzle
2. Ceiling window
3. Ceiling wiper
DETAILED CONTROLS AND GAUGES
(6)
a
b
a
ON
b
(1)
(3)
(7)
c
d
OFF
c
(2)
3-71
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