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Hercules — (See Illustration No. 5)

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

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Procedure

  1. 1. A crankcase ventilation metered control valve (A) mounted in the tube between the intake manifold
  2. (B) and the rocker arm cover (D).

Source: manual:335813135-Hercules-G1600-Service-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.