IBM V03 Maintenance Information page 188

Tractor drive gear in the drive position (engaged)
4. Observe the position of the tractor drive gear.
v In the engaged position, the tractor drive gear drives the
pin feed belts.
v In the idle position, the tractor drive gear does not drive the
pin feed belts.
5. Move the drive gear to the right (drive position).
6. Perform the Rear tractor service check.
Chapter 5. Removals, service checks and adjustments
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