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Using Teflon tape to seal the hydraulic fittings of a Garmin® Marine Autopilot
It is not recommended that Teflon tape be used when sealing the hydraulic fittings of a Garmin® Marine Autopilot. Teflon tape can lead to residue in the hydraulic fluid, which in turn can become stuck in the hydraulic valves causing problems.
It is recommended to use Loc-Tite medium strength (222) or higher strength (242) or equivalent.