CONTROLS AND OPERATION
7. Push the Outrigger/Steering Selector Valve in end engege
2. SWING LEVER. Push this lever forward to swing the
the latch to divert hydraulic fluid to the steering system.
upper to the left (toward the boom). Pull this lever beck to
This step is not required on machines equipped with the
swing the upper to the right.
optional carrier remote control system. The transfer from
outrigger to steering is accomplished automatically when
3. BOOM TELESCOPE LEVERS. Two levers are used to
the MASTER switch is placed in the OFF position.
extend and retract the boom sections. Each lever controls
one telescoping section of the boom, end each is identified
UPPER CONTROL IDENTIFICATION
The instruments and controls in the upper cab are shown in
Lever A controls boom section No. 2.
Figure 2-7. The numbers on this illustration correspond to
the numbers in the following list, which identifies the con-
Lever B controls boom section No. 1.
trols and describes their function.
Push both levers forward to extend all the telescoping set-
tions of the boom. Pull both levers back to retract all the
Holding a control lever in either engaged position
telescoping sections of the boom.
after a cylinder has reached its maximum stroke in
the corresponding direction will force hydraulic fluid
through the relief valve at maximum speed and pres-
sure, and will cause overheating of the hydraulic
Extend all boom sections equally. If all the sections
are not extended equally, operate the control Ievers
1. SIGNAL HORN BUTTON. Depress the button on the
individually as required to equalize the boom sec-
top of the swing lever to sound the upper signal horn.
Figure 2-7. Upper Controls