Perkins — The engine operating conditions are monitored.

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

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Procedure

1. Engine monitoring
2. Engine speed governing
3. Cold start strategy
4. Automatic air/fuel ratio control
5. Torque rise shaping
6. Injection timing control
7. System diagnostics

Source: manual:Perkins Operation and Maintenance Manual 1106D Industrial Engine.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.