BUCKET AR-MULTIPURPOSE 3187251 - Caterpillar

Engines with Mechanical Unit Injection:
3114
3116
3126There are two types of fuel injection control linkages that are used on these engines.
Illustration 1 g00704229
Illustration of the 162-8756 Fuel Injection Control Linkage (Current Design) or the 170-7670 Fuel Injection Control Linkage (Current Design). Notice the washer on rivet (1). Notice the direction of rivet (1) .The current design of the fuel injection control linkages is the 162-8756 Fuel Injection Control Linkage (for 3116 engines and 3126 engines) and the 170-7670 Fuel Injection Control Linkage (for 3114 engines). If you have a 162-8756 Fuel Injection Control Linkage or a 170-7670 Fuel Injection Control Linkage this publication is not applicable to your engine. Refer to Illustration 1.
Illustration 2 g00704226
Illustration of the 102-7459 Fuel Injection Control Linkage (Former Design) or the 4P-9048 Fuel Injection Control Linkage (Former Design). Notice there is no washer on rivet (2). Notice the direction of rivet (2) .The former design of the fuel injection control linkages is the 102-7459 Fuel Injection Control Linkage (for 3116 engines and 3126 engines) and the 4P-9048 Fuel Injection Control Linkage (for 3114 engines). These fuel injection control linkages may need to be inspected. Refer to Illustration 2.The rivet that retains the fuel injection control linkage to the governor link may become loose on some 3114, 3116, and 3126 engines with Mechanical Unit Injection (MUI). A loose rivet may result in wear of the rivet. A worn rivet may result in poor engine performance.The following engines may have this condition:
3114 (S/N: 5EF; 1ZG; 6AF; 5JG)
3116 (S/N: 2WG; 4PG; 2SG; 4KG; 1SK; 1NJ; 5EN; 2MR)
3126 (S/N: 8NM; 6SR; 9ZR; 1ZJ)This condition may have the following symptoms:
Instability at low idle
The engine dies at low idle.
The engine surges under operational loads.
Illustration 3 g00704232
Rivet for the fuel injection control linkage (2) The riveted joint for the fuel injection control linkage should be inspected. Refer to Special Instruction, REHS0601, "Inspection and Modification of the 102-7459 Fuel Injection Control Linkage and the 4P-9048 Fuel Injection Control Linkage " for the inspection procedure.The inspection of the fuel injection control linkage should be performed when the valve cover is removed for service or repair. In order to inspect the riveted joint for the fuel injection control linkage, the 128-8823 Pliers may need to be substituted with the 136-4149 Governor Pliers. Refer to "Modification of the 136-4149 Governor Pliers ".If 180-7956 Clamp is used, the 128-9640 Injector Synchronization Fixture may need to be modified. Refer to "Modification of the 128-9640 Injector Synchronization Fixture Group".Note: Caterpillar recommends the replacement of the complete fuel injection control linkage at the time of engine overhaul or engine reconditioning. The replacement of the complete fuel injection control linkage is recommended at high hours due to normal wear and increased clearances of the control shaft bearings.If the 180-7956 Clamp is installed no further inspections of the control linkage is required.Modification of the 136-4149 Governor Pliers
Illustration 4 g00701811
136-4149 Governor Pliers The 128-8823 Pliers in the 128-8822 Fuel System and Governor Tool Group that are called out in Illustration (4) in Special Instruction, REHS0601 are the