Cumberland 4070 - Fuse Issues and Bearing Problems; Belt Slippage and Granulate Buildup

40 Series Granulators Page 43
Problem
Possible Cause
Solution
Machine stalls/(optional)
fan stalls
Machine has loose or
thrown belts.
Inspect, and if
acceptable for use,
reinstall and tighten per
instructions.
(Optional) Fan wheel is
loose on shaft.
Tighten screws as
required.
Excessive power
required-blown fuses
Bearings sound noisy or
are excessively hot
Overloading of the
machine
Reduce the amount of
feedstock put into the
machine per unit of time.
Knives are dull
Sharpen or replace
knives and reinstall.
Knife gap is too large
Adjust knives to proper
gap specification.
Clearance between the
rotor knives and screen
is too small.
Check that the screen is
properly seated in the
screen chamber.
Overloading of the
machine
Reduce the amount of
feedstock put into the
machine per unit of time.
Bearings have exceeded
their rated life.
Consult the Cumberland
Service Department for
replacement instructions.
Belts slip or squeal
Belts are too loose
Tighten per maintenance
instructions.
Overloading of the
machine.
Reduce the amount of
feedstock put into the
machine per unit of time.
Pulleys are not properly
aligned.
Loosen and align as
required.
Machine has thrown
belts.
Inspect, and if
acceptable for use,
reinstall and tighten per
maintenance instructions.
Granulate builds up in
the transition or tubing
Fan is too small
Replace with larger unit
or fan wheel.
Transition or tubing is
clogged due to
overloading of machine.
Reduce the amount of
feedstock put into the
machine per unit of time.
Return air vents are
covered or too small.
Ensure the vents are
open.