Hercules G-1600 — Draining or Changing Fuel Filters (Primary & Secondary)

Maintenance · fuel system

For the Hercules G-1600, from the Hercules service manual.

Procedure

1. Close 1/4 turn shut-off valve.
2. Start engine and allow to idle until fuel is exhausted.
3. Open drain cocks on both primary and secondary filters and drain into a suitable container.
4. Close drain cocks, open 1/4 turn valve and start engine.
5. To change filters: unscrew bowl from head and set aside, remove end cap, and remove and discard clogged filter element.
6. Inspect head O-rings for cracks or cuts.
7. Re-install element and end cap.
8. Carefully screw bowl into head until stop is reached (do not tighten with wrench).
9. Turn gas on and check for leaks; correct immediately.

Source: Hercules service 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.

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