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THRESHOLD SAFETY WARNING SYSTEM
Refer to Figure 2-9 for the location of threshold warning system components. The lift incorpo-
rates two light beams that detect when a passenger (or object, such as a wheelchair) is in the
vicinity of the baseplate (threshold area). The beams are enabled when the platform is one inch,
or more, below the vehicle floor. If someone passes through either of the beams when the plat-
form is one inch below the floor an audible buzzer is actuated. This system provides a margin of
safety for lift users by warning them if the platform is below floor level. The platform must be at
floor level when boarding the platform prior to exiting the vehicle.
MANUAL BACK-UP PUMP
Refer to Figure 2-10. The manual backup pump is located inside the hydraulic pump housing,
and is used to operate the lift if electrical power is not functioning. Controls for the pump consist
of a pump handle to raise the platform and a pump pressure release valve to lower it. Instruc-
tions for operating manual pump are provided in the MANUAL OPERATION paragraph, which is
part of the LIFT OPERATION section in this chapter.
PUMP HANDLE
SOCKET
PUMP PRESSURE
RELIEF VALVE
PUMP HANDLE
MANUAL BACKUP
PUMP
FIGURE 2-10: MANUAL BACKUP PUMP & HANDLE
BUZZER
(INSIDE)
LIGHT
BEAMS
APPROXIMATE
THRESHOLD
AREA
FIGURE 2-9: THRESHOLD WARNING SYSTEM
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