3304 & 3306 – Stopping the Engine with Solenoid Shutoff

Activate To Run Solenoid

30. Solenoid. 31. Spring. 32. Shaft.

The function of the shutoff solenoid is similar whether it is an “activate to run” or “activate to shutoff” type. With either shutoff solenoid, the engine can be stopped without effect from the position of the governor control. The activate to run solenoid is always connected to electrical power while the engine is running. The solenoid (30) pulls in shaft (32) putting spring (31) in compression. When the eletrical power to the solenoid stops, spring (31) pushes shaft (32) against lever (34). Lever (34) has a pin (33) which comes in contact with edge (35) of lever (36) and pushes lever (36) in the direction shown.

33. Pin. 34. Lever.

29. Shaft. 35. Edge. 36. Lever. 37. Housing.

Lever (36) is tight on shaft (29) which is through housing (37). On the other end of shaft (29), lever (26) moves in the same direction. Lever (26) pushes against pin (25) in lever (24). Lever (24) is tight on the end of the fuel control shaft (21). The turning of lever (26) makes lever (24) turn the fuel control shaft (21) in the same direction. This stops the engine by putting the sleeves low on the plungers so there is no injection. This movement is independent of governor action because a spring (22) connects lever (23) and lever (24) on the fuel control shaft (21). Lever (24) can turn the fuel control shaft to the fuel off position by bending spring (22) without changing the position of the parts of the governor first.

19. Hole. 21. Fuel control shaft. 22. Spring. 23. Lever. 24. Lever. 25. Pin.

Activate To Shutoff Solenoid

SHUTOFF SOLENOID (Activate To Shutoff)
30. Solenoid. 38. Shaft.

The activate to shutoff solenoid works on the other end of lever (34). The end of shaft (38) is behind lever (34). When the electrical power is on, the solenoid pulls in on shaft (38). This moves lever (34) in the same direction as an activate to run solenoid would move the lever. The rest of the linkage moves in the same way to stop the engine.

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