Оригинал
There are a few types of wear that occurs more frequent:
−    Nose formation
−    Cupping
−    Localized wear
−    Uneven wear around the concave  circumference
How to identify them and applying the correct solution

Common wear issues
Nose Formation
Normal Reason
−    Crushes with an A-mantle (high wear zone) together with the wrong combination of throw 
Consequence
−    The nose formation can drastically reduce the capacity (narrow outlet from the crushing zone)
Can cause high pressure peaks
How to correct
−    Change to B-mantle. B-mantle should be used with large throw.

Tramp Iron
−    Trying to crush the un-crushable
−    Causes high stresses in the crusher
−    Wear parts failure (cracking)
−    Crusher failures
−    Control system
−    Control system monitors crusher load and lowers the main shaft.
−    Tramp causes high loads very quickly and can therefore not be completely avoided.

An A-alarm is the most serious type of alarm. An A-alarm will immediately stop regulation and will also stop the feed to the crusher if the feed interlock output from the control system is used. If the feed interlock is not connected, the feed must be stopped in some other way. Regulation cannot be restarted until the fault has been corrected.
The operatorless machine doesn’t need to take a break between shift changes. There is no shift change. The only time you need to stop the machine is to refuel or service it. And typically, the machine will continue to operate seamlessly, so there’s no breaks between when it trams to position, when it starts to jack itself up, or it starts to drill a hole. There’s no break. The computer thinks faster than a human.