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Home›Repair guides›Buffer Screw Adjustment

Detroit Diesel — Buffer Screw Adjustment

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

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Before you start

  • Do not raise the idle speed more than 15 rpm with the buffer screw.

Procedure

  1. With the engine running at normal operating temperature, turn the buffer screw "in" (Fig. 8) so that it contacts the differential lever as lightly as possible and still eliminates engine roll.
  2. Hold the buffer screw from turning and tighten the lock nut.

Specs & torque values

  • 15 rpm maximum increase

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.