Autoquip FREIGHTLIFT FLT - Manual (Page 54)

54
OPERATING INSTRUCTIONS
DANGER !
To avoid personal injury or death, do not operate this equipment with
substandard, defective, or missing parts. Contact a local FREIGHTLITE
service representative if a deficiency is found.
WARNING !
Close all gates when not in use! Never leave the FREIGHTLITE unattended
with the gates left open!
WARNING !
All gates and/or doors of the FREIGHTLITE are electrically interlocked and
must be closed to permit operation the lift. Do not operate unit with doors
open or with the interlocks or other safety devices “defeated” (bypassed)!
Serious injury or death could result.
UP
When the “UP” button is pressed, and all interlocks are closed, the coil of the motor
starter (M1) will close the line contacts of M1 permitting the 3-phase electric power to be
applied to the motor. The auxiliary contacts of M1 also close and act as holding
contacts to maintain the UP circuit. The rotating motor shaft is mechanically coupled to
a positive displacement gear pump. This pump will rotate, assuming proper motor
rotation direction, and it draws oil from the reservoir. The oil is pressurized, causing
flow through the check valve, and forces it out to the ram through a high pressure hose.
To displace the incoming volume of oil, the ram is forced to move in an outward
direction.
The direct displacement two-stage ram assembly is attached to the platform carriage
and is captured in the base of the lift. One stage pushes down and the other stage
pushes up causing the carriage to ascend. The platform carriage will continue to move
upward as long as the motor is running. The platform carriage is guided in the two
vertical masts by rollers that are captured on opposite sides of the mast flange. When
the platform carriage makes contact with the upper stop bolts (or any other obstruction
in the path of the carriage), the pressure switch senses an increase in pressure, which
engages the holding circuit and shuts off the motor.