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6 Troubleshooting
Problem Possible Cause Solution
Feedstock may be hung up inside the
hopper.
Shut machine down and check.
No granulate
Vacuum line may be clogged. Clean as needed.
Comb gap is too large. Adjust to proper gap specification.
Stringy granulate
Combs are dull. Reverse bed comb or replace
combs and re-install.
Fines
Combs are dull. Reverse bed comb or replace
combs and re-install.
Overloading of the machine. Reduce amount/size of feedstock
put into the machine.
Combs are dull. Reverse bed comb or replace
combs and re-install.
Excessive power required;
blown fuses
Comb gap is too large. Adjust to proper gap specification.
Overloading of machine. Reduce amount/size of feedstock
put into the machine.
Machine stalls
Pieces of feedstock jammed in the
rotor.
Clear the jammed material then
visually inspect the rotor to insure
it is not damaged and that the
comb gaps are correct.
Lack of lubrication. Lubricate per maintenance
instructions.
Overloading of the machine. Reduce amount/size of feedstock
put into the machine.
Bearings have exceeded their rated
life.
Consult with Ball & Jewell Service
Department at 1-800-966-8664 for
replacement instructions.
Bearings sound noisy or are
hot
Bearings are not properly installed or
tightened.
Consult Ball & Jewell Service
Department at 1-800-966-8664 for
installation instructions.
Fuses are blown. Replace fuses with the size and
type shown on the wiring diagram
(located in the control enclosure).
Check the limit switch at the
machine front and any hopper
cleanout door. Ensure proper
actuation and adjust or replace as
needed.
A limit switch is open.
Verify that the correct pushbuttons
are being depressed and that the
main disconnect switch is in the
ON position.
Motor does not start
Overload relay tripped Reset by electrician/technician.
Feedstock hangs up in the
hopper or cutting chamber
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.