Pellerin Milnor Corporation 49
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Drive Pulley and Belt Maintenance
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Figure 7. Examples of drives this instruction applies to: one or more V-belts, attached V-belts and
tooth belts
NOTICE: "Remove power from the machine" means use the necessary safety procedure
for your location. In the USA, this is the OSHA lockout/tagout (LOTO) procedure. More
local requirements can also apply.
WARNING: Risk of Injury or death — A machine in operation without safety guards
is dangerous. Drive belts can pull in your body or clothing.
� Remove power from the machine when you do work on the
mechanisms.
� Stay out of the machine frame when you do a test on the machine.
� Replace all covers before you put the machine into operation.
TIP: Read these documents from the Gates Corporation (www.gates.com) to know
more about pulley and belt maintenance: "Belt Drive Preventive Maintenance & Safety
Manual" and "Preserve your investment - Check Engine Belts Often."
Pulley Requirements
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• Keep pulleys free of dirt, oil and other contamination.
• Replace pulleys with groove damage.
• Align pulleys and shafts.
• Keep run-out in tolerance.
Condition of Grooves on Pulleys
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Replace a pulley if:
• the grooves have burrs, cracks, or worn areas that can cause damage to the belts.
• the belts touch the bottom of the groove at any point (Figure 8 ).
Drive Assemblies
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