SEAL 6J3134 - Caterpillar

The fuel rack setting must be correct before the adjustment for the fuel ratio control can be checked. Refer to Testing and Adjusting, "Fuel Setting - Adjust" for information that relates to the adjustment of the fuel system.The 6V-3075 Dial Indicator for fuel rack setting is used for the adjustment of fuel ratio control.
Illustration 1 g01029264
Fuel ratio control (typical example) (1) Cover (2) Valve
Remove cover (1) from the fuel ratio control.
Making contact with a running engine can cause burns from hot parts and can cause injury from rotating parts.When working on an engine that is running, avoid contact with hot parts and rotating parts.
Start the engine.
Push the end of valve (2) downward and hold the valve in this position for two or three seconds. This action will manually move the valve into the operating position.
Move the governor control lever toward the fuel-on position. Return the lever to the low idle position. Move the lever several times in order to remove air from the oil that is in the control. This will make the result of the test more accurate.
Rapidly move the governor control lever in the fuel on direction. Read the maximum measurement on the dial indicator. This is the dynamic fuel ratio control setting. See the Technical Marketing Information (TMI) for the correct fuel setting.
To make an adjustment to the fuel ratio control, turn valve (2) in a clockwise direction. This adjustment will increase the amount of fuel that is possible at the current rack position. Turn the valve counterclockwise in order to decrease the amount of fuel that is possible at the current rack position.
After an adjustment is made, repeat 5. When the adjustment is correct, put cover (1) on the control. Align the bolt holes. Install the bolts.
Stop the engine. After the oil pressure has drained from the fuel ratio control, check the fuel rack setting again in order to ensure that full rack travel is available.