IBM 6400 Maintenance Information Manual page 240

Chapter 7
Section I: Replacement Procedures
Installation
1. Open the doors on the left and right tractors. Position the tractor belts so
the alignment marks are at the top on both tractors. (See Figure 39.)
2. Grasp the vertical adjustment knob and slide the splined shaft through the
right side plate, the tractors, and the left side plate (page 274, Figure 50).
Make sure the same spline passes the marked groove on each tractor.
3. Install the bearing clamp and screw.
4. Apply a thin film of bearing lubricant to the bearing.
5. Slide the spring link and bearing onto the left side of the splined shaft with
the white nylon bushing flange to the outside of the printer.
6. Attach the spring to the left side plate and the spring link.
7. Install the grip ring on the splined shaft with 0.010 inches of clearance
between the grip ring and the nylon bearing.
8. Install the ground clip and screw.
9. Install the paper feed timing belt (page 188).
10. Set the paper feed timing belt tension (page 154).
11. Adjust splined shaft skew (page 168).
12. Install the paper supports on the splined shaft and support shaft. (See
Figure 50, page 274, item 21.)
13. Return the printer to normal operation (page 153).
240
Figure 39. Splined Shaft and Tractor Installation
NOTE: Align the marks on
each tractor before inserting
Tractor
the splined shaft.
Alignment Mark
Splined Shaft