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Home›Repair guides›Load Limit Screw Setting and Adjustment

Detroit Diesel — Load Limit Screw Setting and Adjustment

A Detroit Diesel service procedure — check it applies to your exact model before use.

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Before you start

  • Steps 2 and 3 must be completed on both cylinder banks before proceeding with Step 4.

Procedure

  1. Release the injector control racks.
  2. Turn the adjusting screw down (clockwise) until it just touches the spring and the lock nut is tight against the plate. Then release the injector control racks.
  3. Wipe the oil from each spring and the bottom of each adjusting screw so the point of contact can be seen readily.
  4. Start the engine. Then, with the engine running at full governed speed, check the horsepower. If necessary, re-adjust the screws to obtain the specified horsepower. Turn the screws down to decrease the horsepower; turn the screws up to increase the horsepower. When the desired wheel horsepower is obtained, hold the screws from turning and tighten the lock nuts.

Tools required

  • Dynamometer

Specs & torque values

  • Specified horsepower setting

Source: manual:part 2.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.