Service Manual Instruction Manual

SECTION 6 - JLG CONTROL SYSTEM
3121171 – JLG Lift – 6-67
2. After the operator presses the ENTER key , the
Control System will verify that the BCS is in the Normal
state:
• The “AXLE LOCKOUT VALVE – SHORT TO BATTERY
OPEN CIRCUIT FAULT”, “OSCILLATING AXLE PRESSURE
SWITCH DISAGREEMENT” and “BRAKE – SHORT TO
BATTERY” faults are not active
• the axles are completely extended
• the tower is retracted the boom transport length
• main boom dual capacity length and limit switches are
all in the retracted positions
• the main boom transport angle switch is in the trans-
port position
• the tower lift is below elevation
• the drive orientation switch is indicating the turntable
is between the rear tires
• the chassis is not tilted
• the Boom Sensors and tilt sensor calibrations have
been successfully completed
• the machine is in Ground Mode.
If the initial conditions are not met, the Control System
will prompt the operator with analyzer messages to sat-
isfy the initial conditions.
• “CHECK FAULTS”
• “AXLE VALVE FAULT”
• "OSC AXL SW FAULT”
• “PARK BRAKE FAULT”
• “EXTEND AXLES”
•“TOWER IN”
• "MAIN DOWN”
• “TOWER DOWN”
• “RETRACT MAIN”
•“ALIGN TURNTABLE”
• “LEVEL MACHINE”
•“CAL. BOOM”
• “SELECT GRND MODE”
3. The Control System will then prompt with the following:
The control system will then suppress the “BCS VIOLA-
TION – BOOM LOCKED” fault to allow the boom to be
taken out of transport position and disable all hydraulic
functions except Tower Lift Up and Down.
4. Once the Tower boom lifts such that the Tower Cylinder
Angle sensor reads greater then 20 degrees, Tower Lift
up will be suspended and Main Lift up and down will be
enabled. The screen will read: