IBM 4247-003 Maintenance Manual - Page 316

Rear Paper Door Paper Bail Tractor Assembly Upper Feed Roller Platen Figure 70. Rear Push Path. (Viewed From Left Side) 5. Ensure that the rear tractor assembly is in the push mode. To put the tractor assembly in push mode, pull the two levers on the back and pivot the part that mounts to the printer until it detents. 6. Ensure the rear tractor push-pull selector is set correctly. To set the rear tractor for the push forms path, push the push-pull selector toward the rear of the printer until the gear shafts are completely at the top of the slots in the selector. See Figure 71 on page 317 and Figure 59 on page 305. 7. Inspect the following parts for wear, damage, or binds. Use knob (PN 08H7271), if available, to hand cycle the paper feed mechanism to observe the parts. The knob installs on the left end of the platen shaft. Install new parts, as needed. v Upper feed roller assembly - This is CRITICAL for successful rear push path operation. The rubber rollers wear with paper feeding. If print registration is the problem or extra paper is found behind the platen, the upper feed roller assembly must be replaced. v Upper feed roller gear v Push selector gear v Tractor assembly gears Chapter 5. Removals and Adjustments 316