D379, D398, D399 INDUSTRIAL & MARINE ENGINES Caterpillar


Governor

Usage:

Remove Governor

1. Disconnect control linkage (1) from governor.

2. Disconnect line (3) for the fuel ratio control.

3. Remove the cable (2) for shutoff control.

4. Disconnect oil lines (6) and (5) from the governor.

5. Remove six bolts (4) that hold governor to governor drive housing.

6. Remove the governor. Weight is 40 lb. (18 kg).

Install Governor

1. Put the governor on engine with lever on governor engaged in groove (slot) in rack.

2. Install the bolts that hold governor to governor drive housing.

3. Connect line for the oil pressure gauge.

4. Connect the line for oil pressure switch.

5. Connect the line to the fuel ratio control. Install the cable for shutoff control.

6. Connect control linkage to the governor.

Disassemble Governor

start by:

a) remove governor

b) remove fuel ratio control with override

1. Remove covers (1) and (2) from the governor.

2. Remove the high and low idle screws (3).

3. Remove the bolts (6) that hold levers to shaft.

4. Remove the levers (7). Remove the shaft (4).

5. Remove bolt (5) that holds housing to governor. Remove housing (8).

6. Remove the seals from housing (8).

7. Remove the stop group (9).

8. Remove the screw that holds the stop collar. Remove the stop collar (10).

9. Remove the spring and seat.

10. Remove the four bolts (11) that hold governor housing. Remove the governor housing (12).

11. Remove speed limiter plug (13), gasket (14), spring (15), and plunger (16).

12. Remove the lever (17) from the shaft.

13. Remove the governor spring, seat, spring and washer.

14. Remove the bolt (19) that holds lever assembly (18) on shaft.

15. Remove the shaft (20) from governor housing. Remove the bearings and seal from governor housing.

16. Remove the lever assembly (18).

17. Push the pin (21) from lever (18).

18. Remove the spring (22) and plunger (23).

19. Remove the three bolts (27) and lock (28) that hold weight assembly to governor drive housing.

20. Remove the two bolts (26) and locks. Push cover assembly (24) up and remove the weight assembly (25).

21. Remove the ring (30) from the seat. Remove the pin (29).

22. Remove the seat (31), bolt (32), washers (33) and spring (34).

23. Remove the sleeve and bearing assembly from the weight assembly.

24. Remove the ring (37) that holds bearing assembly on sleeve (35).

25. Remove bearing (38) and races (36) from sleeve (35).

26. Remove the valve (42) from piston (41).

27. Remove the ring (39) that holds cylinder to weight assembly. Remove the weight assembly.

28. Remove piston (41) and sleeve (40) from the cylinder (43).

29. Remove the O-ring seal from the sleeve (40).

30. Remove the cover and shaft assembly (44) as a unit from the drive housing.

31. Remove gear (45) from the pin assembly.

32. Remove the bolt (47) and washer from shaft assembly.

33. Remove the gear (46) from the shaft.

34. Push the bearings (50) and shaft (49) out of the drive housing.

35. Remove the bearings, shaft, lever (48) and pin assembly (51).

36. Remove the valve assembly (52) and gasket.

37. Remove the plug assembly (53) and gasket.

38. Remove the cover (54) from drive housing.

39. Remove the bushing from drive housing.

Assemble Governor

1. Install the valve assembly (1).

2. Install the plug assembly (2).

NOTE: For standard engine rotation, the location of valve (1) is on the right side of governor drive housing. For reverse engine rotation, change the plug assembly (2) with the valve (1).

3. Install the cover (3).

4. Install the bushing in drive housing with tooling (A).

NOTE: Install the bushing so it is not extended more than .465 to .475 in. (11.81 to 12.07 mm) above the bottom of pump bore.

5. Install the pin assembly (7).

6. Install the lever (4), bearings (6), and shaft (5).

NOTE: Shaft (5) must turn freely in the bearings with .02 to .06 in. (0.5 to 1.5 mm) end play.

7. Heat the drive gear (9) to 250°F to 300°F (121°C to 149°C), and install it on the shaft and cover assembly (8).

8. Install the washer and bolt (10).

9. Install O-ring seal (13) on the sleeve (14).

10. Install piston (12) and sleeve (14) in the cylinder (11).

11. Put the weight assembly (16) on cylinder (17) and install ring (15).

12. Install the valve (19) in piston (12).

13. Install the bearing and races on sleeve.

14. Install the sleeve and bearing assembly (18) on valve (19).

15. Put the seat (21), bolt (20), washers and spring on the valve.

16. Install the pin (22) and ring (23).

17. Install gear (25) on the pin assembly.

18. Install the cover and shaft assembly (24) in the drive housing.

19. Push the cover and shaft assembly up and install the weight assembly (26) on the cover.

20. Install the locks and bolts (27) that hold cover and shaft assembly to drive housing.

21. Install lock (28) and bolts that hold weight assembly.

22. Install spring and plunger in lever (29). Install pin in lever.

23. Install bearings and seal in governor housing (30).

24. Install lever (29), shaft (32) and bolt (31) that holds lever to shaft.

25. Install speed limiter plunger, spring, gasket and plug. Install rack stop group.

26. Install the seat (35), spring (34) and washer (36) in governor housing (30).

27. Install the spring (33) on the bolt (20).

28. Install the governor housing on drive housing and install the bolts.

29. Install the spring and collar. Install the rack stop collar.

30. Install screw (38) that holds rack stop collar (37).

31. Install seals, shaft (42), lever assembly (40), locks, and bolts in cover assembly. Install the cover assembly (39). Install seals in cover with lip of seal toward the inside.

32. Install high and low idle screws (41).

33. Install covers (43) and (44) on governor housing.

NOTE: Be sure pin (45) is in slot of rack stop collar when cover (44) is installed.

end by:

a) install governor

b) make adjustment to governor (See GOVERNOR ADJUSTMENTS in TESTING AND ADJUSTING)

c) install fuel ratio control with override

Caterpillar Information System:

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