Maeda CC1485S-1, Инструкции по эксплуатации, Страница: 42 / 370

34
CAUTIONS ABOUT HIGH TEMPERATURE OIL WHEN OPERATING CRANE
When hydraulic oil temperature exceeds 80°C, high pressure hoses and seals can be
damaged by heat, and it may cause burning to skin from oil spray.
If temperature of hydraulic oil exceeds 80°C, stop the operation and wait until the oil cools
down.
Continuous crane operation for a high lifting height with the accelerator pedal depressed will
increase the hydraulic oil temperature. Take special care during this operation.
CAUTIONS WHEN OPERATING WINCH
• Select a suitable number of wire rope falls to the hook and
boom length to the mass of hoisted load.
Refer to "OPERATION 4. HANDLING OF WIRE ROPE"
for details.
• Do not allow persons to enter the area 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, pull toward you or hoist diagonally.
Such attempt may cause the crane to tumble or get
damaged.
• Overwinding of the hook block may result in collision with
the boom, snipping the wire ropes and causing the hook
block and load to fall and may lead to serious accidents.
Take care not to overwind 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 that is wound up irregularly.
If wound up irregularly, not only the wire rope gets damaged
and the lifetime is shortened, but it may snip the wire rope
and causes serious accidents.
Observe the following precautions to avoid wire rope from
winding up irregularly.
• Do not let the hook block tumble on the ground.
• When lowering the hook block for a long distance for
underground works, be sure to leave more than 3 turns of
the wire rope on the winch drum.
• When decelerating from a high-speed hoisting, slacken the
accelerator pedal to lower the engine revolution, and then
slowly return the right-hand side machine operation lever. A
sharp returning of the right machine operation lever while
leaving the revolution at a high level causes the hook to
jump up due to the rapid deceleration shock, resulting in an
irregular winding.
• Use the winding and unwinding operations in the
high-speed mode when winding or unwinding the hook only.
Winding and unwinding a hoisted load in the high-speed
mode may cause such a serious accident as damage of the
boom or frame, or tumbling of the Machine.
• If the wire rope is twisted and causes the hook block to turn,
fully eliminate the twist before work.
Refer to the description under "OPERATION 4.3
MEASURE WHEN WINCH WIRE ROPE IS TWISTED".