ENGINE AR-PRIMARY 3711441 - Caterpillar

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Remove bearing block assembly (56) from pivot shaft (60) .
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Remove adjuster (63) for the torque cam from pivot shaft (60). Remove torsion spring (62) from pivot shaft (60). Inspect the condition of the parts on pivot shaft (60). If any of the parts are worn or damaged, use new parts for replacement.
Remove fulcrum lever (61) from pivot shaft (60). Remove the spring from the end of pivot shaft (60) .
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Push limit sleeve (66) and control sleeve (64) toward each other and compress spring (65) in order to expose retaining clip (67). Remove retaining clip (67) from governor output servo (68). Inspect the parts of the servo assembly for wear or damage.
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Remove retaining ring (69) with Tool (C). Remove the shaft of governor output servo (68) by pulling out on the clevis.Note: Limit sleeve (66), spring (65), and control sleeve (64) will come out of the governor housing when the governor output shaft is removed.
Inspect the governor output shaft for wear or for damage. If the governor output shaft is worn or damaged, use a new part for replacement.
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Remove retaining clip (70) .
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Remove washer (72), limit lever assembly (71), and spring (73). Inspect the condition of limit lever (71) .
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Remove one bolt (76). Remove bracket (75) and fuel ratio control valve (74) .
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Remove fuel ratio control lever assembly (77). Do not remove shaft (78) from the governor front housing.
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Remove O-ring seal (79) from fuel ratio control valve (74). Check the O-ring seal for wear or damage. If the O-ring seal is worn or damaged, use a new part for replacement.Note: The fuel ratio control valve is not serviceable. Do not disassemble the fuel ratio control valve beyond this point.Note: The following steps are for the disassembly of the C spring on Type I governors.
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Remove bolt (80) and the sleeve assembly that holds cover (81) in position. Remove cover (81) .
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
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Remove C spring (82) carefully in order to avoid personal injury.
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Remove drive gear (83) .Note: Inspect the cam on the fuel transfer pump. If the cam has excessive wear, it will be necessary to replace the entire drive assembly.Note: Inspect all of the parts of the governor upon disassembly. For information on reusability of components in the governor, refer to Guideline For Reusable Parts And Salvage Operations, SEBF8434, "3100 Governor Inspection and General Information for Mechanical Governor Groups Used in 3114, 3116, and 3126 Engines Equipped with Mechanical Unit Injectors (MUI)". For information on cleaning the components in the governor, refer to the Cleaning Guide, SEBF8354, "Equipment And Chemical Recommendations Reference Manual".