• Select the hook appropriate for the load weight and right number of
wire rope falls.
For details, see “Operation 5. Handling Wire Rope”.
• Do not let persons enter below the hoisted load.
• When hoisting a load, always stop once at the "takeoff" position
where the hoisted load leaves the ground. Check subjects such as
load stability and load force, then hoist up the load.
• Do not pull laterally, towards you or hoist diagonally. Such attempt
may cause the crane to tip or suffer damage.
• Over-winding of the hook block may result in collision with the
boom, snapping the wire ropes and causes the hook block and load
to fall and cause serious accidents. Be fully careful to prevent
over-winding the hook block.
• Be careful to prevent the wire rope and/or hoisted load from
contacting an obstacle such as a tree or steel when hoisting a load.
If caught by an obstacle, do not forcibly wind up the hoist load, but
untangle the caught part before winding up.
• Do not use the winch drum wire rope in random condition. If
random, not only the wire rope suffers damage and shortens the
lifetime, but the wire rope may snap and causes serious accidents.
Observe following precautions to avoid wire rope from becoming
random.
• Do not let the hook block hit the ground.
• Before leaving the hook block lowered for a long time, for instance
when working with underground, leave at least three loops of wire
rope in the winch drum.
• Release the accelerator pedal to decrease the engine speed, and
slowly return the right working control lever to decelerate from
high-speed hoisting. Returning the right working control lever
quickly at high speed will result in a rapid deceleration shock in the
hook, popping the hook and leading to irregular winding.
• Hoisting/Lowering in high-speed mode should be used to
hoist/lower the hook alone. Hoisting/Lowering the hung load in
high-speed mode can break boom, frame or cause serious
accidents in which the machine turns over.
• If the wire rope is twisted and causes the hook block to turn, fully
eliminate the twist before work.
See “Operation 4.2 What to do with Twisted Winch Wire Rope” for
details.
To Next Page
Loading...
