MAGUIRE PRS-20, Installation Operation & Maintenance

Page: 30 / 47

Maguire Products, Inc.
Edition: June 20, 2012 – PRS-20
30
Maguire Purging Recovery System
5 – Troubleshooting
OVERVIEW This section is intended to serve as a guide in checking on possible
problems that may occur with the operation of your granulator.
SAFETY The most important ingredient in any business or industry is a constant
adherence to sound safety practices. The best way to assure safety in any
activity that involves troubleshooting or repairing the granulator is to retain
complete control of the machine. The most effective way to accomplish
this on a consistent basis is to:
TURN OFF THE POWER
LOCK OUT THE POWER SOURCE
TAG THE MACHINE -
"DO NOT OPERATE"
DIAGNOSIS OF THE PROBLEM
When you are correcting what may appear to be a malfunction, it is recommended that you
check your facilities associated circuitry, and assemblies to ensure that there are no other
defective devices. If the root cause of the problem appears to be related to the granulator, it
is imperative that you contact Maguire Products, U.S.G. Division before disassembling any
components.
TROUBLESHOOTING GUIDE
Troubleshooting techniques are listed in the following pages. But regardless of the problem
that presents itself, remember to approach all situations in a guarded, safe manner with full
awareness of those working in the area.
5.1 – Troubleshooting - Symptoms/Cause
1. Motor Fails To Start
•
Safety Interlocks are not satisfied or inoperative (i.e. door is not closed
completely).
•
Starter overload is "tripped-out"
•
Starter is inoperative
•
Power supply failure
2. Excessive Power Required Resulting In Tripped Overload
•
Overloading of granulator
•
Knives are dull
•
Knife Gap is too large
•
Partial or complete screen blockage
•
Installation fault, motor is running in opposite direction
•
Pieces of grinding material jammed around or beneath rotor
3. Bearing Sounds Noisy, or Is Hot
•
Overloading of granulator
•
Bearings have exceeded their rated life
•
Dirt or contamination in bearing
•
Shredder rotor bearings may need to be lubrication