BONNET 8N4217 - Caterpillar

Disassemble the Fuel Pump
Some photographs and illustrations in this book are of the DB2 Fuel Pump. The DB4 Fuel Pump is slightly different, but the procedures given are basically the same.
DB2 Fuel Pump
DB4 Fuel Pump The plate is a piece of 1/4" flat steel with six holes drilled through. Two holes 9.5 mm (.375 in) are drilled to attach the plate to 9S6363 Fixture Assembly. Three holes 9.5 mm (.375 in) are drilled to attach the fuel injection pump to the plate. One hole 69.85 mm (2.750 in) is drilled through the plate for clearance for the fuel injection pump shaft.START BY:a. remove fuel injection pump Maintain cleanliness at all times during this disassembly and assembly procedure. Keep the work area clean, the tools clean, and the mechanics hands clean at all times during this procedure. All seals and gaskets should be replaced during the assembly procedure. 1. Mount pump in fixture as shown. 2. Remove the O-ring seal from the front of the housing. 3. Put plug (1) in fitting (2). Put cap (3) on aneroid tube (4). 4. Remove clip (5) from rod (6). 5. Remove fitting (2) from the housing. 6. Instal plug (7) in the housing. Remove four bolts (8) that hold aneroid bracket (9). Remove bracket (9) and aneroid (10). 7. Remove three bolts (11) and washers, and governor control cover (12). As you remove the governor control cover, note how the solenoid assembly (13) is hooked in the governor control. 8. Remove two nuts (14), two electrical plugs (15), two washers, two nuts, and two seals. Remove the gasket and the solenoid assembly (13).
Mechanical Governor
Speed Droop Governor9. Use 4C8053 Remover (L) to remove key (16) from the throttle shaft assembly. Remove spacer (18) from the throttle shaft assembly. Slide out throttle shaft assembly (17). Remove dashpot assembly (19) and damper spring (20).
Speed Droop Governor
Mechanical Governor
Speed Droop Governor
Mechanical Governor
Speed Droop Governor10. Loosen guide stud (21). While holding the governor spring and components (22) together, remove guide stud (21), and the governor spring and components (22). 11. While depressing the metering valve assembly (23), raise the governor linkage hook assembly (24) from the metering valve arm pin. Disengage the linkage hook assembly (24) from governor arm and lay the linkage hook assembly (24) over the side of the housing.12. Remove the metering valve assembly (23). 13. Remove vent wire screw assembly (25). 14. Remove cap locking screw (26), plate (27), and seal (28). 15. Remove end cap assembly (29) using 4C6989 Socket (D).16. Remove regulating assembly (30) from the end cap.17. Remove inlet filter screen (31). 18. Remove plug (32), spring (33), and piston (34) from regulating assembly (30). Some Fuel Injection Pumps have a bushing pressed into the regulator instead of a seal. The bushing should not be removed and the seal is not required if the bushing is present. 19. Remove four blades (35), two springs (36), and liner (37). 20. Remove O-ring seal (38). 21. Loosen two