JLG X20J Plus Operator Manual User Manual
Page 96
BOOM LIFT MODELS X20JPLUS
JLG
92
X20JPR0020413
ROTATION WITH 1ST‑2ND ARM FOLDED AND 1ST‑2ND ARM DESCENT ON THE
THERMIC/LITHIUM ENGINE
If the turret is rotated with the first or second arm folded or nearly folded, there is the risk of
the first arm hitting against the engine. For this reason, free rotation areas and limited rota‑
tion areas are defined.
LIMITED ROTATION AREA: is an area near the engine where this may be hit by the first
arm.
FREE ROTATION AREA: is the rest of the rotation area that does not coincide with the limi‑
ted rotation area.
These two areas are identified through the combined control of two sensors: a microswitch
that verifies the height of the first and second arm, and a proximity switch mounted inside
the turntable that senses the position of the turret while it turns.