IBM V03 Maintenance Information page 191

Tractor drive gear in the idle position (not engaged)
12. Install both tractors.
13. Turn on the printer.
14. Select the front tractor path at the operator panel if READY
Front is not displayed by pressing the Stop and the
Park/Path keys.
15. Press Load/Eject.
16. Turn off the printer.
17. Remove both tractor assemblies.
18. Look at the rear tractor asm.
The drive gear should have moved right (idle position).
19. If the rear tractor drive gear fails to smoothly move in both
directions, exchange the following FRUs one at a time. Test
each FRU. If the problem remains, reinstall the original FRU
and continue.
a. rear tractor asm.
b. Logic board
c. Tractor cable asm.
Chapter 5. Removals, service checks and adjustments
191