Service and Repair Manual
September 2018
Limit Switches and Angle Sensors
138
S
®
-60 XC
™
• S
®
-65 XC
™
Part No. 1288652GT
Types of Limit Switches
There are two types of limit switches, found in
various locations throughout the machine:
mechanical-type
operational/safety
switches and
rotation
or
angle
sensors. As in aircraft, which
features redundant safety systems, each
mechanical operational switch is backed up with a
separate, independently functioning safety switch.
The mechanical-type
operational
or
safety
switches are used to sense a positive displacement
or movement of the limit switch actuator, or arm, as
the machine moves through its range of operational
functions. The
rotation
or
angle
sensors utilize Hall
Effect technology and must be calibrated when
replaced. Included in this group are envelope limit
switches which sense the extended length and
angle of the booms and rotational position of the
turntable.
An example is the drive enable limit switch, which
disables the drive function anytime the boom is
rotated past the rear tires, indicated by the 'circle'
end of the drive chassis.In some cases, the engine
will be stopped if safety parameters are exceeded.
Numbering Legend
LS
FA
1
L
O
LS
Limit
Switch
FA
Front
Axle
Circuit
Number
L
Load
moment
O
Operational
LT
Stringpot
RA
Rear
Axle
A
Angle
S
Safety
RS
Rotary
Sensor
LF
Left Front
D
Down
LR
Left Rear
E
Extend
RF
Right
Front
R
Retract
RR
Right
Rear
J
Jib Boom
P
Boom
T
Turntable
Summary of Contents for S-65 XC CE
Page 87: ...September 2018 Service and Repair Manual Manifolds Part No 1288652GT S 60 XC S 65 XC 77 ...
Page 89: ...September 2018 Service and Repair Manual Manifolds Part No 1288652GT S 60 XC S 65 XC 79 ...
Page 97: ...September 2018 Service and Repair Manual Manifolds Part No 1288652GT S 60 XC S 65 XC 87 ...
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