Hercules — Be sure fire ring and grommets are in place.
A Hercules service procedure — check it applies to your exact model before use.
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Procedure
- 13. Install the cylinder head. See "Cylinder Head Torque", per Illu-
- stration No. 20.
- 14. Insert the valve push rods and install the rocker arm assemblies.
Source: manual:HERCULES D4800 Maintenance 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.