GEAR ASSEM. (8 teeth-drive) 2P9235 - Caterpillar

SHUTOFF CONTROL (Cross Sectional Side View; Normal Operation)
1. Worm shaft. 2. Slide follower. 3. Slide follower shaft. 4. Cover. 5. Guide. 6. Piston. 7. Spring. 8. Release rod.Under normal engine operation, engine lubrication oil goes through line (4). (See illustration of Shutoff control.) This oil goes to cover (4) and against control piston (6). (See illustration Shutoff Control, Cross Sectional Side View; Normal Operation.)One end of slide follower (2) is engaged with guide (5). The follower is free to pivot about slide follower shaft (3) in the housing and is activated by the movement of guide (5).Worm shaft (1) is turned by the shutoff drive which is turned by the fuel injection pump camshaft. Any time the engine is running the control is in operation.When the pressure of the engine oil is normal, piston (6) is held against guide (5) putting spring (7) in compression and keeps slide follower (2) out of contact with worm shaft (1).
SHUTOFF CONTROL (Top View; Normal Operation Position)
1. Worm shaft. 2. Slide follower. 3. Slide follower shaft. 5. Guide. 8. Release rod. 9. Pin. 10. Release latch. 11. Spring.When the pressure of the lubrication oil drops below normal operating range, the oil pressure on piston (6) will also drop and spring (7) will force guide (5) and piston (6) to the stop position and cause slide follower (2) to turn on shaft (3) and contact worm shaft (1).The slide follower (2) will move the length of worm portion of shaft (1) when slide follower (2) is engaged with worm shaft (1). As the follower comes close to the end of its movement, pin (9) on the follower makes contact with release latch (10).The release latch is then moved out of engaged position and releases rod (8) which moves outward by force of spring (11).
SHUTOFF CONTROL (Side View; Shutoff Operation Position)
1. Worm shaft. 2. Slide follower. 3. Slide follower shaft. 5. Guide. 6. Piston. 7. Spring. 8. Release rod.
SHUTOFF CONTROL (Top View; Shutoff Operation Position)
1. Worm shaft. 2. Slide follower. 8. Release rod. 9. Pin. 10. Release latch. 11. Spring.Release rod (8) moves cable assembly (12) which is connected to the governor drive housing. The cable assembly contacts the lever assembly in the governor drive housing to move the fuel rack to the fuel off position and stop the engine.
RACK SHUTOFF
12. Cable assembly.Engine Reversal Protection Control
The shut off control for engine reversal protection is the same as the control for low oil pressure except the threads on worm shaft (1) go in the opposite direction. Low oil pressure will shut off the engine only if the engine runs in reverse. The oil pressure will be low because the engine oil pump will not give oil pressure in reverse.Overspeed Shutoff
OVERSPEED CONTROL
1. Carrier assembly. 2. Rotating weight. 3. Release latch. 4. Release rod.When an overspeed (engine running too fast) condition has happened, the overspeed shutoff control, located in the shutoff control housing, will activate the release rod. The release rod moves the fuel rack to the