BUSHING 1930786 - Caterpillar

Rack Adjustment For Engines With The New Scroll Fuel System (NSFS)
1. Remove the variable horsepower actuator from the rear of the governor housing.2. Adjust the high horsepower setting using the standard fuel system setting procedure in the service manual.3. Remove the 6V7941 Compressor Assembly and replace the plug in the rear of the governor housing.4. Remove the dust cover from the variable horsepower actuator. Loosen the jam nut on the actuator rod. Tighten the washered adjusting nut to put the actuator rod in the fully retracted position.5. Install the variable horsepower actuator.6. Move the governor control to the high idle position and hold the control in this position.7. Extend the actuator rod, by loosening the washered adjusting nut, to achieve a minimum dial indicator reading of 2.0 mm (.08") less than the desired low horsepower setting. Example: If the low horsepower rack adjustment specification is 3.0 mm (.12"), the actuator rod must be adjusted to obtain a dial indicator reading of 1.0 mm (.04").
8. Tighten the washered adjusting nut, to retract the actuator rod and increase the dial indicator reading to the specified low horsepower setting.9. If the low horsepower setting is exceeded, repeat Steps 7 and 8.10. Tighten the jam nut on the actuator rod and install the dust cover.Rack Adjustment For Engines With Sleeve Metering Fuel System (SMFS)
1. Remove the air fuel ratio control from the rear of the governor housing.2. Use the procedure in the service manual and adjust the high horsepower setting.3. Install the air fuel ratio control.4. Remove the rear covers from the air fuel ratio control to expose the adjusting pin.5. Move the governor control to the high idle position.6. Turn the adjustment pin clockwise to adjust the air fuel ratio control rod to the FULLY EXTENDED position.7. To adjust the low horsepower setting, turn the adjustment pin counterclockwise to retract the air fuel ratio control rod. Retract the rod until the rack reading is decreased to the specified setting.8. Replace the covers on the air fuel ratio control.