25 Boom Angle (Dual Load) Limit Switch (Ls4) - Skyjack SJ82 T Service Manual

Section 5 – Procedures
5.4-25 Boom Angle (Dual Load) Limit
Switch (LS4)
LS4 detects the angular position of the boom so
the system can switch to and from the low and high
capacity load zones, as the boom raises or lowers.
LS4 is normally closed. It is held open by a cam on
the turret frame. When the boom is raised past 57°,
the switch roller loses contact with the cam and the
circuit closes.
When equipped with automatic platform load sensing
(CE machines), an overload state can be detected
automatically. The system does not allow the boom to
further lift or extend into the 500 lb (227 kg) zone (1)
when overloaded.
1
Automatic platform load sensing
When not equipped with automatic platform load
sensing (ANSI machines), the operator must manually
toggle the platform capacity selector switch (2) to
further lift or extend the boom from the 750 lb (340 kg)
zone into the 500 lb (227 kg) zone.
Platform capacity selector switch
229040ABA
206
M62357AA
2
M62356AA
LS4 is the lower switch located on the rear, left-hand
side of the turret frame.
LS4 location on turret frame
NOTE
Make sure the switch roller rotates freely and the
switch arm is free to move as the boom raises
and lowers.
Limit switch arm and roller
Boom
M62359AA
M62366AA
SJ82 T, SJ86 T