Aichi SP12C, Operation Manuals

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Chapter 3 - Safety System
14
Chapter 3
Safety Systems
1. Relief valve
Protect the hydraulic components by relieving
abnormally high pressure in the hydraulic
system.
2. Single holding valve on
Boom elevation cylinder
Prevents the boom from natural descent in
the event of hydraulic hose breakage.
3. Double holding valve on
Boom telescope cylinder
Prevents the boom from natural descent in
the event of hydraulic hose breakage.
4. Double holding valve on
Upper leveling cylinder
Maintains the platform level in the event of
hydraulic hose breakage.
5. Double holding valve on
Fly jib cylinder
(SP14CJ only)
Prevents the fly- jib from natural descent in
the event of hydraulic hose breakage.
6. Foot switch
The boom, fly jib, platform and traveling
functions are disabled unless the foot switch is
depressed.
7. Foot switch cancel system
This system cancel the foot switch / enable
switch if any of the boom, fly jib, platform and
traveling function is not operated more than
20 seconds, then the power indicator light
blinks. Release the switch once and the power
indicator light turn on, then operate again to
enable the functions.
8. Enable switch (Lower
control)
The boom, fly jib and platform functions from
the lower control panel are disabled unless
the enable switch is operated.
9. Emergency stop button
Stops all of the movements of the machine
when this button is pressed.
10. Tilt alarm buzzer
The tilt alarm buzzer sounds, if the machine
tilts more than 5 degrees.
11. Travel speed limit system
The high speed traveling is disabled, unless
the boom is retracted, lowered under the
horizontal and rotated to rear center of the
machine.
12. Rotation lock pin
Fixes the turntable to the chassis to prevent
the turntable from being rotated when
transporting the machine.
13. Emergency pump
Auxiliary hydraulic pump driven by the battery.
And used to lower the platform in the event of
engine or main pump failure.
14. Boom wire rope failure
detecting system
This system disables the boom extending
functions in the event of the boom extension
wire rope failure.
15. Overload sensing system
This system disables all of the functions,
Overload warning light blinks and Overload
buzzer sounds when the platform is
overloaded.