Manual
55
OPERATING INSTRUCTIONS
When the motor stops, the hydraulic oil in the system is held I place by the spring-
loaded check valve that has returned to its seat, thereby blocking the backflow through
the control valve. The platform carriage will maintain its position at the upper floor level.
DOWN
Pressing the DOWN push-button will cause the timer relay #1 (TR-1) to close its
contacts and start the preset time out sequence. The closed contacts of TR-1 permit
115-volt control power to be applied to the down solenoid coil that is inside the control
valve.
The coil causes the core plunger to move outward, allowing the down valve to open and
the pressure-compensated down speed regulator to regulate the degree of the valve
opening. This is dictated by the weight of the load placed on the platform carriage. The
carriage will come to a stop when it reaches the lower stops or the floor level. At this
point, there is no pressure remaining in the hydraulic system and there is no flow
through the down valve, even though the valve remains open.
One of two things can happen at this point in the operation of the FREIGHTLITE lift.
1. The timer relay (TR01) in the system can “time-out” and allow the down valve to
close, OR
2. The “UP” button can be pushed, which will interrupt the timer circuit causing the
down valve to close.
Either condition will close the controlled breach in the hydraulic pressure system and
pressure will be developed, which will raise the platform carriage when the motor is
started.
EMERGENCY STOP
Press the red emergency stop button to stop all travel of the FREIGHTLITE at any time.
After the emergency stop button has been reset, any level button may be pressed to
continue travel.
The emergency stop button will interrupt all electrical control functions when it is
activated. Movement of the carriage will cease, regardless of its direction.
STORAGE
When not in use, it is always best to store the unit with the carriage in the fully lowered
position. This removes pressure from the hydraulic system during non-use and will
extend the overall life of the components in the hydraulic system.