Governor System Repairs; Governor System Repairs; Governor Operation - Toro Workman 3000 Series Service Manual

Governor System Repairs

Governor Operation

The governor keeps the engine operating at a constant
speed by balancing the centrifugal force acting on the
governor weights and the governor spring tension. As
the engine picks up speed, the governor weights open
to move the sliding shaft forward. The shaft pushes on
the governor lever to move the injector control rack and
decrease the fuel injection rate. At the same time the
governor spring is pulled by the governor lever until the
spring force is balanced with the centrifugal force of the
1. Sealing metal
2. Sealing wire
3. Speed adjustment screw
4. Governor weight assembly
5. Sliding shaft
6. Stopper
7. Governor spring
8. Governor shaft
9. Governor lever
10. Tie rod
Workman 3300-D/4300-D
governor weights, thus maintaining constant engine
speed.
When the speed control lever is pulled toward high
speed, the governor spring is pulled. The spring pulls on
the governor lever to move the governor control rack
and increase the fuel injection rate. As engine speed
increases, the governor weight centrifugal force also
increases until it is balanced with the governor spring
force, thus maintaining a constant engine speed.
Figure 61
11. Tie rod clip
12. Tie rod cover
13. Tie rod cover gasket
14. Tension lever
15. Start spring
16. Governor spring lever
17. Speed control lever ass'y
18. Governor cover gasket
19. Governor cover gasket
20. Return spring
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21. Stop lever assembly
22. O-ring
23. Snap ring
24. Stop lever
25. Grooved pin (3 x 20 mm)
26. Grooved pin (3 x 14 mm)
27. Torque spring set
28. Sealing cap
Liquid Cooled Diesel Engine