CWL-20E
|
9
|
en
Operation
8.
Operation
8.1
Preparing the work area
It is important that the surrounding area be properly
chosen and prepared before raising a load.
1.
Use the lift system only on hard surfaces capable of
safely supporting the load. The surface must be
strong enough to support the weight of the lift units
and the vehicle being raised. The ground pressure for
each lift unit (at maximum load) is 275 psi (19.3
kg/cm
2
).
The
ground
pressure
listed
is
an
approximation and may be higher under some
conditions. Hot asphalt can become soft and should
be avoided to prevent property damage or an unsafe
situation.
2.
Use the lift system only on level, even surfaces. A
level surface is considered to be 3° slope or less. A
surface with 3° slope is equivalent to a 5% grade or
5/8 in. (15.9 mm) rise or drop per horizontal foot
(304.8 mm) (See Fig. 4 below. Note also that for each
degree of slope a surface rises or drops 0.210 in.
(5.33 mm) per horizontal foot (304.8 mm)). The surface
must also be free of ripples, ridges, depressions,
holes, or any undulation (e.g., a seam in a concrete
floor) that would cause only part of the lift unit’s
footprint to be in contact with the floor.
Fig. 4: Slope of ground under lift
3.
Make sure there is adequate clearance above the
highest point of the vehicle (including things like
vehicle exhaust pipes, air dams, etc.) so the vehicle
does not contact any overhead objects when raised
(e.g. ceiling/roof structural components, duct work,
hanging lights, heating/AC units, etc.). The lift system
can raise a vehicle as much as 24” (610 mm, but the
vehicle will extend vertically above this. The height of
the lift unit alone (at maximum lift height) is 77 1/4”
(1,962 mm).
4.
Clear the work area (especially the area underneath
the lift unit) of any unnecessary personnel, tools,
equipment and other materials. No unauthorized
personnel should be allowed in the work area where
the lifts are being used.
5.
If the lift system is used outdoors the operator
assumes all risk. Understanding that these are
portable lifts, it is foreseeable that they can and will be
used outdoors.
WARNING!
If lift units are used outdoors the following
conditions must be met:
Do NOT use lift units when wind speeds or gusts
exceed 20 mph to avoid tipping or loss of load.
Do NOT leave lift units unattended when used
outdoors to avoid inadvertent operation by untrained
operators and unforeseen changes in weather
conditions.
Do NOT use lift units outdoors when precipitation of
any type is falling or expected during the time the
units will be used. There is a risk of electric shock if lift
units are used while precipitation is falling.
Do NOT charge lift units while outdoors. Only charge
lift units while indoors to avoid risk of electric shock.
If these conditions cannot be met, move the vehicle
and lift units (separately) to an indoor area where the
lifting operation can be performed safely.
WARNING!
NEVER attempt to move or reposition a
lift unit when a vehicle is raised on the lift unit.
8.2
Prepare the vehicle
1.
The vehicle’s wheels (or rims; not the tires) should be
at least 19 inches in diameter or else they could fall
through the cradle of the lift table (for example, if the
tires deflate). For wheels 16 to 19 inches in diameter
refer to the “Optional adapters” section on page 25.
2.
Check that the tires on the vehicle are properly
inflated and are in road-worthy condition. Make sure
the weight on any single tire does not exceed the
rated capacity of its lift unit, as the total weight of the
vehicle may not be evenly distributed across all lifted
tires. Also, be sure to consider the weight carried by
unsupported axles (i.e. a set of 4 lift units used to
raise a vehicle with three axles).
