236Chapter 5 Replacement ProceduresShaft, SplinedIMPORTANT In order to preserve correct alignment of the side plates, the barrierpanel must remain installed and fastened during this procedure.Removal1. Prepare the printer for maintenance (page 154).2. Remove the paper supports from the splined shaft and support shaft.(See page 268, item 4.)3. Remove the paper feed timing belt (page 193).4. Unlock the left and right tractors and slide them to the center of the shaft.5. Remove the screw securing the right tractor shaft plate and remove theplate (page 268, items 7 and 8).6. Slide the splined shaft out of the sealed ball bearing in the left tractor shaftplate and remove the tolerance ring from the left end of the splined shaft(page 268, items 3, 5, and 6).7. Hold the tractors so they do not fall, grasp the vertical adjustment knob,and slide the splined shaft to the right, out of the tractors and side plate.Installation1. Open the doors on the left and right tractors. Position the splined shaft sothe alignment marks are at the top on both tractors. (See Figure 36.)2. Slide the splined shaft through the right side plate and tractors. Make surethe same spline passes the marked groove on each tractor.(See Figure 36.)3. Install the tolerance ring on the left end of the splined shaft (page 268,item 5).4. Insert the tolerance ring lead-in portion into the sealed ball bearing in theleft tractor shaft plate (page 268, items 3, 5, and 6) while sliding the ballbearing into the right side plate. Push the splined shaft to the left until theflange on the ball bearing is in solid contact with the right side plate. Thesplined shaft will protrude about 1/16 inch (1.6mm) from the ball bearing.5. Install the right tractor shaft plate and screw (page 268, items 7 and 8) byfirst sliding the upper “fingers” up and against the flange on the ballbearing, then sliding the rectangular cutout over the support shaft end,then snapping the U-shaped “spring” behind the tab on the right sideplate.6. Install the paper feed timing belt (page 193).7. Set the paper feed timing belt tension (page 156).8. Install the paper supports on the splined and support shafts.(See page 268, item 4.)9. Return the printer to normal operation (page 155).
