CYLINDER GPB-BOOM 1624671 - Caterpillar

Remove two bolts (80) and bracket (81) from the governor rear housing. Inspect bracket (81) for wear or for damage.
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Remove lever (82) from the governor rear housing.
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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.
Remove three bolts (83) and cover (84) from the fuel ratio control.
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Remove retainer (85) and diaphragm (86) from cover (84) .
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Remove washer (87) and spring (88) from cover (84) .
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Remove fuel ratio control valve (89) from the governor rear housing.
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Remove spring (90) and spring seat (91) from fuel ratio control valve (89). Remove the piston and seal (92) from fuel ratio control valve (89). Remove return spring (93) from fuel ratio control valve (89) .
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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.
Note: Spring (96) is compressed in order to achieve a 50 N (11 lb) preload.
If necessary, remove retaining ring (94), spring seat (95), and spring (96) from fuel ratio control valve (89) .Note: Do not remove the pin from fuel ratio control valve (89). The fuel ratio control valve and the valve body are serviced as one unit. Some fuel ratio control valves do not have a pin that joins the valve and the valve body. In this case, the valve and the valve body are serviced separately. Elimination of the pin in the fuel ratio control valve provides overfueling for easier starting. Refer to the Systems Operation, "Fuel Ratio Control (Types V, VI, and VII)" topic for more information on the fuel ratio control.Note: The following steps are for the disassembly of the Type VI Dual Horsepower Mechanism.
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Typical example of the dual horsepower mechanism on the Type VI governor (97) Wire retaining clip (98) Solenoid (99) Bolt
Remove wire retaining clip (97) and remove solenoid (98) from the dual horsepower mechanism.
Remove three bolts (99) that hold the Type VI dual horsepower mechanism in position on the governor.
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(100) O-ring seal (101) Access plug (102) Seal (103) Valve cavity (104) Spring (105) Piston assembly (106) O-ring seal (107) Collar (108) O-ring seal (109) Nut (110) Setscrew
Remove the dual horsepower mechanism from the governor.
Remove O-ring seals (106) and (108) from the dual horsepower mechanism. Inspect the O-ring seals for wear or for damage. If the O-ring seals are worn or damaged, use new parts for replacement.
Remove access plug (101) and O-ring seal (100) .
Remove setscrew (110) and nut (109) .
Use a large screwdriver to loosen piston assembly (105) from collar (107) .
Remove O-ring seal (102) from piston assembly (105) .
Remove spring (104) from the housing.
Inspect all of the parts for wear or for damage. If any of the parts are worn or damaged, use new parts for replacement.Note: Inspect all parts of the governor