Hercules — Replacement of the Main Bearings
Repair & overhaul
From a Hercules owner's manual — check it applies to your exact model before use.
Procedure
- Disconnect the battery cable at the battery as a safety measure.
- If the starter is mounted below the oil pan level and causes interference, disconnect the starter cable and wiring and remove the starter.
- Drain the crankcase oil.
- Remove the oil pan; remove the tachometer drive if used.
- Remove the oil pump.
- Loosen all main bearing cap screws.
Source: Hercules owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.