Sterlco BP800 Series Granulators - Manual (Page 34)

800 Series beside-the-press Chapter 6: Troubleshooting 34 of 43
General Problems
Problem Possible Cause Possible Remedy
Overheating of bearings
Dirt or contamination in the
bearing Correct source of
contamination
Excessive belt tension Adjust belt tension
No lubrication Check bearing seals
Knives moving in their seats
May be foreign matter on the
knives
Carefully clean seat
Knife screws loose
Tighten screws with torque
wrench at values specified
Knife screws weakened
Screws must not be used
more than 6 times
Broken Knife
Improper re-sharpening
Check knife grinding method
used
Extremely hard material Contact supplier
Incorrect rotor direction Check rotor direction
Foreign body in the cutting
chamber
Look for cause with operator
Faulty fitting of screen Check assembly procedure
Excessive knife wear
Incorrect knife position
Correct the gap or distance
between bed knives and rotor
knives
Improper knife re-sharpening
Check dimensions with
figures included in this
manual.
Abrasive material
Contact the supplier for
special knives
Abnormal screen wear
Incorrect fitting of screen
Check that the screen is
correctly seated in its rear
position and that it fits
perfectly at the front
Abrasive material
Contact the supplier for
special knives
Rotor jamming
Excessive in-feed material
Reduce amount of material
being fed to the machine
Total or partial obstruction of
the screen holes Remove the screen and clear
the holes
Insufficient belt tension
Check and/or adjust belt
tension
Knives worn Replace with new knives
Distance between the knives
too small or large Check distance between
knives
Screen holes too small
Increase screen hole
diameter
Failure of air conveying
system or discharge system Check fan rotation and make
sure pipes are not obstructed