Belt, Paper Feed Timing - IBM 6400 Maintenance Information Manual

Chapter 7
Section I: Replacement Procedures

Belt, Paper Feed Timing

Removal
1. Prepare the printer for maintenance (page 152).
2. Cabinet Model: Remove the paper guide assembly (page 229).
Pedestal Model: Remove the top cover assembly (page 204).
3. Cabinet Model: Loosen four screws and remove the barrier shield.
(See page 258, Figure 44, items 3 and 4.)
Pedestal Model: Loosen the four screws securing the paper guide and
barrier shield. Remove the paper guide and barrier shield. (See page 260,
Figure 45, items 3, 4, and 5.)
4. Remove the timing belt cover by squeezing the front and back to release
the plastic tabs from the slots in the side plate (page 258, Figure 44).
5. Loosen (do not remove) the paper feed motor mount screws (page 278,
Figure 52, item 10).
6. Loosen the setscrew in the paper feed motor pulley collar.
7. Remove the paper feed timing belt by sliding the paper feed motor pulley
off the motor shaft and the belt off the splined shaft pulley.
Installation
1. Install the paper feed timing belt over the splined shaft pulley and the
motor pulley. Slide the motor pulley onto the paper feed motor shaft (page
278, Figure 52).
2. Holding a 0.040 inch feeler gauge between the pulley collar and the motor
body, torque the 7/64 inch collar screw to 25
0.23 N•m).
3. Using the straight end of a force gauge, apply 15 pounds (66.7 N) of
pressure to the paper feed drive motor near the mounting base of the
motor. Use the splined shaft to steady the gauge.
4. Reduce tension to 12 pounds (53.4 N) and torque the paper feed motor
mount bolts to 18
5. Snap the timing belt cover into the slots in the side plate (page 258,
Figure 44).
6. Cabinet Model: Install the barrier shield and tighten the four screws.
(See page 258, Figure 44, items 3 and 4.)
Pedestal Model: Install the barrier shield and paper guide and tighten the
four screws. (See page 260, Figure 45, items 3, 4, and 5.)
7. Cabinet Model: Install the paper guide assembly (page 229).
Pedestal Model: Install the top cover assembly (page 204).
8. Return the printer to normal operation (page 153).
188
± ±
2 inch-pounds (2.03 0.23 N•m).
± ±
2 inch-pounds (2.82