700 Series Lawn Tractor
154
PTO Belt
The function of the PTO belt is to transfer the mechanical force from the engine to the deck. The belt faces many
different forces.
• The friction of the belt grabbing the different pulleys creates heat. This heat softens the belt weakening it.
• Every time an electric PTO is engaged, the PTO belt is subjected to an impact load. When the electric
PTO is engaged, it goes from 0 to 3,600 RPM instantly. Over time, this will cause the belt to wear out.
NOTE: Engaging the Electric PTO before the mowing deck is placed into the grass will reduce the impact load
on the belt.
• When a blade impacts an object like a rock or a tree root, the belt is subjected to an impact load similar to
the impact load of engaging the electric PTO.
• The belt has rubber in it. As the rubber ages, it becomes brittle making it weaker.
• When a manual PTO is engaged, it too can cause the belt to slip during engagement. This also causes
wear on the belt.
• Inspect the belt frequently for wear or damage.
If the belt shows any signs of fraying or hot
spots, replace the belt. See Figure 8.10.
NOTE: A damaged belt can cause the deck to
vibrate when the deck is engaged. The
vibration can be bad enough to simulate an
engine issue.
NOTE: Not all belt damage is visible. Broken cords
inside the belt are not visible to the naked
eye, but can cause vibration issues and
greatly reduce the life of the belt.
• The bending and straightening of the belt as it passes the pulleys creates internal friction that heats up the
belts.
Figure 8.10
Damaged belt
Our belts are designed to fit our
equipment and are not standard
lengths. Use of a non-OEM belt may
prevent the mowing deck from working properly.
! CAUTION! CAUTION
FOR DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
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