Adjustments and Tests181Tractor Belt Tension AdjustmentFirst line print compression can be reduced by adjusting the tension of thetractor belts. The procedure below removes the slack that can occur in sometractors.IMPORTANT Only do this procedure when the user reports that the first print line offorms is compressed and only after adjusting the dynamic papertension (page 179). Always adjust both tractors.1. Prepare the printer for maintenance (page 154).2. Adjust the dynamic paper tension (page 179).3. Carefully note the initial position of the adjustment screws. (Figure 18.)CAUTION Adjust tractors only ONE detent at a time. Over-tightening a tractor beltcan cause other paper feed problems and result in premature wear inthe tractors.4. On the inner side of the left tractor, use a Torx T-10 driver to rotate theadjustment screw one detent to increase tension. On the inner side of theright tractor, use a Torx T-10 driver to rotate the adjustment screw onedetent to increase tension. (See Figure 18.)5. Load paper, run a print test, and check for first line compression.6. If compression still occurs, rotate the adjustment screws one more detentand test again.7. If compression is not improved after adjusting the tension by two detents,return the adjustment screws to the initial positions you noted in step 3.8. Return the printer to normal operation (page 155).Figure 18. Tractor Belt Tension Adjustment184075aAAArrow points to LH (left) orRH (right) tractor.Left tractor (LH) is shownhere.Left Tractor: One Click and Test.Right Tractor: One Click and Test.
