Service manual

4. Push-Pull Tractor Method
The push-pull tractor method is a combination of the push and pull tractor methods. Two tractors advance the
paper: one at the front paper entrance and the other at the rear paper entrance. They operate simultaneously
to push and pull the paper through the printer mechanism. Figure 2-9 illustrates push-pull tractor operation
when paper is fed through the rear paper entrance. Figure 2-10 illustrates push-pull tractor operation when
paper is fed through the front entrance.
LQ-2070 Service Manual Operating Principles
Rev.A 2-9