Operator’s 履带起重机操作手册 Manual for Crawler Crane
3.5 Operation weather 3.5.1 Snow and ice
DANGER (1) Danger of accidents (due to ice falling down); (2) Increased danger of damage due to frozen height limit switches on the main boom, the fixed jib heads. Precautions:
– Lay down the boom and carefully knock off the ice that has collected. – Carefully remove the ice from all sensitive parts, such as limit switches, guides, etc.
CAUTION Safety Guidelines
(1) Snow and ice deposits on the boom:
安 全 准 则
-
Increase the boom weight
-
Increase the surface area the wind blows on.
These factors can lead to a premature shutdown of the movement of the crane. Work can continue, but definitely not at the maximum permitted load. (2) The load moment limiter (usually abbreviated to LMI) -
Must only be triggered in an emergency.
-
Can not be used in normal operations as a device shutting down the crane.
(3) Is not a substitute for judgment of the crane operator.
3.5.2 Lightning Strikes Inside the enclosed cab, the equipment operator is well protected against the direct effects of lightning strikes. The cab can deflect the lightning strike over the entire unit. If the working site is attacked by windstorm frequently or the operation range is limited, the operator is liable to put down the boom. When to lay down the main boom is a matter of opinion and is the responsibility of the equipment operator, when in doubt, always lower the main boom. It’s the manufacturer’s recommendation that the main boom should be laid down promptly when a storm is approaching. Measures to take after observing or suspecting a lightning strike on the equipment: a)
Thoroughly check the equipment, check for any damaged cables or lines for leaks.
b)
Check the entire control system.
c)
Slowly move the slewing gear and listen for unusual noises in the rotary connection, especially in the slewing ring.
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ZCC1100H Crawler Crane
