Instruction manual

5–20
Replacement Procedures and
Illustrated Parts List
Magnetic Pick–up (MPU) Assembly
Removal
1. Prepare the printer for maintenance (page 4–2).
2. Remove the shuttle cover (page 5–16).
3. Disconnect the magnetic pick–up (MPU) cable connector (page 5–63,
Figure 5–12).
4. Loosen the 7/64 inch hex MPU clamp screw (page 5–63, Figure 5–12).
5. Unscrew the MPU assembly from the MPU bracket.
Installation
1. Install the MPU assembly by screwing it into the MPU bracket (page
5–63, Figure 5–12).
2. Using a feeler gauge, adjust the gap between the MPU assembly and the
flywheel to 0.010
± .001 inch (0.254 ± 0.025 mm). Torque the MPU
clamp screw to 19
± 1 inch–pounds (2.15 ± 0.11 NSm).
3. Check the gap between the MPU assembly and the flywheel with a feeler
gauge:
a. If the gap is 0.010
± .001 inch (0.254 ± 0.025 mm), go to step 4.
b. If the gap is not 0.010
± 0.001 inch (0.254 ± 0.025 mm), loosen the
MPU clamp screw and go back to step 2.
4. Route the MPU cable under the extension spring and connect the MPU
cable connector (page 5–63, Figure 5–12). Make sure the MPU cable
does not touch the extension spring after cable connection.
5. Install the shuttle cover (page 5–16).
6. Adjust the hammer phasing (page 4–25.)
7. Return the printer to normal operation (page 4–3).