JLG 1250AJP Service Manual - Manual (Page 294)

SECTION 4 - BOOM & PLATFORM
4-54 – JLG Lift – 3121171
4.19 MAIN BOOM TRANSPORT ANGLE
SWITCH
See Figure 4-35., Boom Sensor Locations - Dual Capacity,
Length, & Main Boom Transport and Figure 4-42., Main
Boom Transport Angle Switch Wiring
The Main Boom Transport Angle Switch is located on the
left side of the tower fly boom underneath the cover. This
switch is used as a backup for the rotary angle sensors
and trips (activates) when the main boom is approximately
15° above the tower boom. It is used to find the transport
position in the event of a rotary angle sensor failure and
also used during Electrical Retrieval (see Section 4.9,
Electrical Retrieval System) to assist in determining the
angle of the main boom when a fault is detected to any
sensor in the Envelope Control System (see Section 4.6,
Envelope Control System).
While conducting boom sensor calibration (see Section
6.17, Boom Sensor Calibration), “position 2” states to lift
up the main boom to stop. The control system will stop
the main boom lift up function at the main boom angle
limit switch trip point (approx 15°).
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
In the OUT of transport position, the screen should read