JLG 1250AJP Service Manual - Manual (Page 295)

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 position 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