AEC Colortronic MTF 3000 Series Granulator - Manual (Page 16)

d) Clearance between the rotor knives and screen is too small. Check that the
screen is properly seated in the screen chamber.
5. Machine stalls.
a)
Overloading of the machine. Reduce amount of feedstock put into the
machine per unit of time.
b) Pieces of feedstock jammed in the rotor. Clear the jammed material then
visually inspect the rotor to ensure it is not damaged and that the knife gaps
are correct.
c) Machine has thrown belts. Inspect, and if acceptable for use, re-install and
tighten per maintenance instructions.
6. Bearings sound noisy or are hot:
a)
Lack of lubrication. Lubricate per maintenance instructions.
b) Overloading of the machine. Reduce amount of feedstock put into the
machine per unit of time.
c) Bearings have exceeded their rated life. Consult with the Cumberland
Engineering Service Department for installation instructions.
7. Belts slip or squeal
a)
Belts are too loose. Tighten per maintenance instructions.
b) Overloading of the machine. Reduce amount of feedstock put into the
machine per unit of time.
c) Machine has thrown belts. Inspect, and if acceptable for use, re-install and
tighten per maintenance instructions.
8. Motor will not start:
a)
Fuses are blown. Replace fuses with the size and type shown on the wiring
diagram (located in the control enclosure).
b) A limit switch is open. Check the limit switches at the machine front doors
and any hopper cleanout door. Ensure proper actuation and replace if required.
c) Verify that the correct pushbuttons are being depressed and that the main
disconnect switch is in the ON position.
9. Granulate builds up in the transition or tubing:
a)
Fan is too small. Replace with larger unit or fan wheel.
b) Transition or cyclonic air separator tubing is clogged. Clean as required.
c) Return air vents are covered or too small. Ensure the vents are open.
d) Fan is not evacuating properly. Check for loose fan wheel on shaft, worn fan
wheel, or loose fan drive belts.
10. Feedstock hangs up in the hopper or cutting chamber/
a)
Material being placed into the machine for processing is too large for the
hopper, cutting chamber, or rotor diameter. Reduce the initial size of the
feedstock.
b) Knives are dull. Sharpen or replace and re-install.
c) Overloading of the machine. Reduce amount of feedstock put into the
machine per unit of time.
16