0314920 JOHNSON PLATE,Leaf

start by:a) remove magneto Caterpillar does not have service parts for the early SCS magnetos because there are not very many early SCS magnetos in the field. Make contact with Fairbanks Morse Company if parts for the earlier magneto are needed. Caterpillar has service parts for the Air-Gap SCS magnetos. 1. Remove four screws (1) from magneto cover and remove cover (2). 2. Put a screwdriver between the heat sink section (5) and the pulser coil housing. Pull the screwdriver to remove the heatsink (5) and end cap section (6).3. Remove four screws (3) from plate (4). Remove plate.
Use care when nut (7) is removed. Do not use the drive coupling to keep the pulser shaft stationary. Damage to the fiber gear can be the result. Use a soft cloth and a pliers to hold pulser arm (8).
4. Remove nut (7) and washer which fasten the pulser to the shaft. Remove pulser arm (8). 5. Remove magnet (9) and plate (10) from shaft. 6. Remove two screws (12) from the center of the pulser coil. Remove pulser coil (11) from housing. 7. Put identification on wires (13) and remove from heatsink. Remove pulser coil (11) from assembly. 8. Remove four screws (14) which hold pulser coil housing (15) to the drive end of the magneto. Remove housing (15). 9. Remove nut (16), washer and coupling (17) from drive shaft. Remove key. 10. Remove seal (18) from housing. 11. Remove snap ring (19) from housing with tool (B). 12. Remove three screws (21) that hold support assembly (20) to housing.
Use a support for components when removed with a press to prevent damage.
13. Install coupling nut on shaft and with a press remove support and magnetic rotor assemblies from housing. 14. Use a press and tool (A). Remove magnetic rotor (22) from support assembly (20). 15. Use a press to push gear assembly (23) from bearing. Remove nut (16) and gear assembly. 16. Remove snap rings (24) from support assembly with tool (C). 17. Remove bearings (25) from support assembly with a press and tool (A). 18. Remove two screws (26) and wedges from housing. Remove coil assembly (27). 19. Remove snap ring (28) from housing with tool (C). 20. Remove bearing from housing with tooling (A).Assemble Magneto
Inspect all gaskets and make replacements if torn or damaged. 1. Install two bearings (2) in support assembly with a press and tool (A). Install snap rings (1) with tool (C). 2. Install gear assembly (3) in bearing support (4) with a press and tool (A). 3. Put the mark (drilled hole) on gear of magnetic rotor (5) in alignment with the mark (arrow) on gear (3). 4. Put nut (6) on the magnetic rotor and install rotor (5) in bearing support with press. 5. Install bearing in housing (7) with a press and tool (A). Install snap ring in housing with tool (C). 6. Install coil assembly (8) in housing. 7. Put two wedges (9) in position in the housing. Install the two screws to fasten the wedges to the housing. 8. Install drive assembly (10) in the housing. Install the three screws in the bearing support. Be sure the drive assembly is in the center of the housing when screws are tightened. 9. Install snap ring (11) on shaft with tool (B).10. Install seal (12) in housing. Install key (13) on the shaft. 11. Install drive coupling (14) on the magneto drive shaft. Install nut (6) that fastens the drive coupling to the shaft. 12. Put pulser coil housing (15) in position on the end of the drive end of the magneto. Install four screws. 13. Put four wires (16) from pulser coil in correct position on heatsink. Install pulser coil (17) in the pulser coil housing. 14. Install plate (18) and magnet (19) on shaft. The side of the magnet with the identification mark must make contact with the pulser rotor. 15. Install pulser rotor (20) to the shaft. (For magnetos that operate in the clockwise direction, the mark "C" on the rotor must be toward the outside, the mark "A" is for counterclockwise magnetos). Install the nut that holds the pulser to the shaft. Tighten nut to a torque of 12 1 lb.ft. (17 1 N m). Use a soft cloth and pliers to hold pulser arm. 16. Install plate (21) in the pulser coil housing. Install four screws that fasten the plate to the pulser coil housing. 17. Put heatsink section (22) and end cap section (23) in position on the end of pulser coil housing (15) and install four screws to hold sections in place.18. Test the magneto as shown in Special Instruction Form No. GEGO2059 to be sure all problems have been corrected.end by:a) install magneto