>  Reason:

> Solution:

• Feeding problems
  
• Wear of the deflectors or paddles of the
  feeder.
  
• Faulty adjustment of the rolls
  
• Irregular milling or presence of powders
  
• Insufficient mixing of the liquids
  
• The paddles of the mixer are not directed
  properly

• Check the operation of the feeder
  
• Change the deflectors or paddles of the
  feeder
  
• Rolls are to be adjusted
  
• Finer milling is required
  
• The direction of the paddles is to be adjusted.
  
• Cleaning of spirals and/or paddles

>  Reason:

> Solution:

• The bearings of the driving unit have too
  much backlash
  
• The bearings of the rolls have too much
  backlash
  
• The die is not perfectly aligned with the roll
  holder
  
• The rolls are not adjusted at the same
  clearance from the die
  
• Rolls slip because of too much molasses

• Adjustment the backlash of the driving unit
  
• Adjustment the backlash of the rolls is
  required
  
• Check the wear conditions of the die
  holder and of the wear ring; if necessary
  overhauling might be also required
  
• Adjustment of the rolls is required
  
• Use of rolls with corrugated closed roll
  shell is required

>  Reason:

> Solution:

• The bearings of the driving unit are worn out
  
• The bearings of the rolls are worn out
  
• The bearings of the transmission or of the
  motors are worn out

• Check the origin of the noise; to this
  regard first move away the rolls and then
  loose the belts. When the origin of the
  noise has been ascertained, replace the
  worn out bearings

>  Reason:

> Solution:

Normal wear

Abnormal wear, shorter life because of:

• Use of unproper grease
• Time interval of the lubrication and quantity do not comply with the instructions.
• Bad clamping condition of the die and/or
  rolls with consequent strong vibration of
  the mill.

• Adjust the backlash of the bearings and
  eventually replace them
  
  
• Use the grease according to the instructions.
  Do not mix different greases.
• Time interval of the lubrication and quantity
  do not comply with the instructions.
• Replacement of the wear ring
• Replacement of the die and/or rolls shells
• Eventually overhaul the die
• Checking and/or cleaning of the magnetic
  separator

>  Reason:

> Solution:

• Many foreign matters in the product
  
  
• Use of not original shear pins having
  dimensions and/or quality non suitable for
  the requirements

• Checking and/or cleaning of the magnetic
  separator
  
• Use shear pins LA MECCANICA

>  Reason:

> Solution:

• Building of mixture clots
  
• Insufficient mixing
  
  
• Irregular flow of the steam
  

• Check the operation of the conditioner
  
• Check that the inlet of the steam is not below the action of the mixing paddles
  
• Check the joints and/or make sure that the inlets of the steam are not clogged

>  Reason:

> Solution:

• Not correct adjustment of the two rolls
  
• Rolls not fixed enough
  
• Wear of the holes of the main shaft where
  the rolls are fixed
  
• Excessive side to side movement of the
  front plate for not correct tolerance of main
  shaft bearings

• Adjustment of the rolls is required
  
• Fixed the rolls
  
• Clean or overhaul the holes of the main
  shaft
  
• Adjust the backlash of the main shaft
  bearings