Scantron iNSIGHT 20 Operator's Manual page 120

Operator's Guide
2.
Remove one core assembly by lifting up and out of
position.
3.
Remove each tire by sliding the tire off the core.
4.
Install each new tire by gently pulling it over the core.
IMPORTANT: Do not overstretch the tire; it may tear.
5.
Replace the core assembly in the feed module. You
may need to slide the shaft to the right or left so the
core fits properly within the feed module housing.
Chapter 4: Maintenance
Replacing the Feed Module Tires
109