Service Manual Instruction Manual

SECTION 4 - BOOM & PLATFORM
3121171 – JLG Lift – 4-55
and
Possible Faults
1. Stuck Switch
• 8/4 Fault Code
• MAIN BOOM TRN AGL SW/SENSOR DISAGREEMENT
Analyzer message.
2. Wire Broken/Disconnected
• 8/4 Code Fault Code
• MAIN BOOM TRN AGL SW FAILED Analyzer message
4.20 TOWER TRANSPORT LENGTH SWITCH
See Figure 4-35., Boom Sensor Locations - Dual Capacity, Length,
& Main Boom Transport and Figure 4-43., Tower Transport Length
Switch Wiring
The Tower Transport Length Switch is located on the left side
of the tower base boom underneath the cover. This switch is
used as a backup for the tower boom string pot length sensors
and trips (activates) when the tower boom is extended
approximately 7” (18 cm). It is used to find the transport posi-
tion in the event of a tower length sensor failure and during
Electrical Retrieval (see Section 4.9, Electrical Retrieval System)
to assist in determining the length of the tower boom when a
fault is detected to any sensor in the Envelope Control System
(see Section 4.6, Envelope Control System).
Analyzer Readings
The analyzer reading for these switches can be found in the
Diagnostics menu under Transport Data.
In the Transport position, the screen should read:
and