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ROD A. 7B0321 - Caterpillar



7B0321 ROD A. Caterpillar parts ROD
Rating:
36
Alternative (cross code) number:
CA7B0321
7B-0321
7B0321
Caterpillar 7B0321 ROD A.

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Illustration 1 g00868655
3161 Governor (typical example) (1) Manual speed setting control (2) Speed adjusting motor head (3) External droop adjustmentThe 3161 Governor is a hydromechanical governor. The 3161 Governor is connected to the engine fuel system by a mechanical linkage. The governor controls the rate of fuel that is injected into each of the engine cylinders in order to adjust for engine loads.The speed adjusting motor is located on the governor cover and runs on 24 VDC power supply. When the motor is actuated, the motor rotates a speed adjustment screw in order to adjust the position of the governor speed adjusting lever.The 3161 Governor has a maximum of 11 N m (9 lb ft) of torque output over the full 42 degrees of terminal shaft rotation while the fuel is in the ON direction and the OFF directions. The governor terminal shafts are moved in both directions by hydraulic pressure. No return spring is used on the outside of the governor. The return spring is located on the inside of the governor. This spring will cause the terminal shafts to rotate to the full shutoff position when the governor is not in operation.The recommended travel (rotation) of the terminal shafts is approximately 30 degrees from low idle to full load. The following results will take place:
There will be extra play at each end of the terminal shafts.
The governor will make a complete shutdown.
The maximum amount of fuel will be provided.The 3161 Governor is connected to the engine oil system. The pressurized engine oil supply is sent to the governor through an orifice and through internal passages. The governor maintains the correct oil level and the governor will drain excess oil back into the engine. This will give a constant flow of engine oil through the governor.The governor must be filled with approximately 1.8 L (1.9 qt) of clean engine oil before engine start-up. Fill the governor with oil if the governor has been removed or if the governor has been overhauled. The oil fill cap on the 3161 Governor is located on the top cover.
Illustration 2 g00868659
Schematic for 3161 Governor (typical example)3161 Governor
This governor is used with a vehicle that requires a specific torque rise application. The basic governor for this vehicle includes the features that follow:
Pneumatic speed control
Fuel ratio control
Torque rise


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