Operation
80
Overview of control lever functions
The figure shows, in connection with the following table, the func-
tions of the left and right control levers.
Operating the boom
If the excavator is overloaded, the boom must be lowered until the load rests on the ground. To prevent personal
injuries and damage to equipment, do not operate any other functions (e.g. moving the swivel frame).
!
To raise the boom, pull the right control lever back (figure/ ).
!
To lower the boom, push the right control lever forward (fig-
ure/ ).
The boom moves as shown in the figure.
Control lever
Movement
Right control lever
1
Lower boom
2
Raise boom
3
Bucket crowd
4
Bucket dump
Left control lever
A
Arm crowd
B
Arm dump
C
Swivel frame to the left
D
Swivel frame to the right
The hydraulic cylinder of the boom is equipped with a
cushioning function, which prevents the excavated
material in the bucket from falling out. When the hy-
draulic system operating temperature is low, the cush-
ioning is delayed for approx. 3 to 5 s. This delay is due
to the viscosity of the hydraulic oil and is not a malfunc-
tion.
Watch the boom during lowering, so that the boom or
the bucket teeth do not hit the dozer.
