Perkins — Service Procedure
For these Perkins models: 400A, 400D, SEBU8311-10.
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Procedure
- Reduce the load and the engine rpm.
- Inspect the cooling system for leaks.
Source: manual:60c739b51bc9c56519465bb5_400 Series Operation Manual.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.