Cranes Flashcards
4 main parts of a crane?
Bridge, hoist, trolley and runway
How many people can give the crane hand signals?
1
What is the exception to only 1 person giving hand signals?
Emergency stop
What are the centralized lubrication systems that cranes are equipped with?
Trabon and farval
What is the minimum amount of laps that can be around a block?
2
What is the centralized shive called?
Equalizer
What does fleet angle only affect?
The outside sheaves
What does IWRC mean?
Independent wire rope core
What does XIPS stand for?
Extra improved plow steel
What are the temperature ranges for multi purpose grease?
-25° to 350°
What is the process called in seating a new rope In the sheaves?
Constructional stretch
Reasons to take wire rope out of service?
Bird caging, dog legged, corrosion and kinking
What is the difference between wheel bearing grease and multi-purpose grease?
Pressure
How many shots of grease should you put in a motor?
1-2 shots, amount increases with a bigger shaft.
Which gear wears out first in a gear case?
Pinion
What should you check for when inspecting couplings?
Bolt tightness, lubrication and backlash
What should you look for when inspecting motors?
Check the brush length and blow off and out the motor.
How much grease should you put in a coupling?
Until you see it come out
When should you change brushes?
When they are flush or below the brush holder
What does a gear case do?
Transmits power
How to check end play in a coupling?
Pull the coupling back and forth
Does gear lube take more or less pressure than gear oil?
More
2 ways to power a trolley?
Collector shoes or festune
Collector shoes can be 2 things?
Spring loaded or gravity
2 types of limit switches?
Weight operated or geared
3 definitions of rope lay?
Direction the strands lay in the rope
Relationship between the way the strands lay in the rope and the wires lay in the strands.
The distance it takes for a strand to make a complete turnaround a core
