Presto Lifts SizzrDok HLD, Installation, Operation And Service Manual

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16 HLD-SLD PRESTO-ECOA OWNER’S MANUAL
OPERATING INSTRUCTIONS
The load capacity rating as stamped on the nameplate of your SizzrDok designates the maxi-
mum lifting capacity with a uniformly distributed load. This capacity must never be exceeded, as
permanent damage may result. Lifting loads that exceed the rated capacity will result in excessive
wear or damage to the lift.
The axle load capacities must be derated for cases where the lift platform is modified in the field.
Consult the factory before any modification is performed in the field.
The SizzrDok is furnished with constant pressure (“dead-man” type) push button controls. Press-
ing the ‘’UP’’ (or RAISE) button, starts the motor, (see wiring diagram) which in turn runs the hy-
draulic pump. The cylinders begin to extend and the platform starts to rise. The platform will rise
as long as the ‘’UP’’ button is pressed. On releasing the button, the platform ceases to rise and
will remain at that particular elevation.
When pressing the “DOWN” button, the Down Solenoid Valve is energized. The cylinders start
retracting as the oil returns to the reservoir and, upon releasing the button, the platform ceases to
lower, remaining at that particular elevation.
When the lift reaches its full vertical travel, the cylinders have extended to its maximum limit. The
platform will no longer travel up due to the internal stops in the cylinders. At this point the relief
valve will open because of pressure build up and oil will bypass into the reservoir. Do not continue
to operate the lift as it will create excessive wear on the pump.
In the event that the lift is overloaded, the relief valve will open because of excessive pressure
build up, and oil will bypass into the reservoir. When the lift reaches a preset vertical travel the
‘’up limit switch” (if purchased) will be actuated. This shuts off the power to the motor. At this
point, pressing the ‘’UP’’ button will have no effect. The platform will remain stationary at the de-
sired elevation.
Always remember that the motor runs only when the ‘’UP’’ button is pressed and the Down Sole-
noid Valve is energized only when the ‘’DOWN’’ button is pressed.
Some “Tips” to the Operator
1. Always load the lift properly by centering the load on the platform as much as possible.
2. Never use the lift if it is in need of repairs, or in the case of a malfunction.
3. Notify your maintenance personnel if you notice anything out of the ordinary, such as bind-
ing, odd pump noises, etc.
4. Do not continue to press the ‘’UP” button if the lift is not rising. You can permanently dam-
age the motor or pump by doing so.
5. Ensure that handrails and chains are in place before operating the lift.