HYDROLAB HL4 Manuel D'utilisation page 15

Keep the battery compartment dry when the battery is replaced. If water gets into the battery
compartment, remove the battery, pour the water out and fully dry the compartment with a towel. Let
the battery compartment air dry fully before use to prevent corrosion.
Note: The internal clock battery is not user-replaceable without authorization from the manufacturer.
Examine the O-rings and sealing gasket
1. At regular intervals, examine the O-rings and sealing gasket in the mooring cap for unwanted
material, wear or damage. Refer to
2. Remove any unwanted material from the O-rings and mooring cap.
3. Replace any O-rings with visible damage or wear (e.g., cracks or missing pieces). Replace with
the O-rings from the manufacturer.
4. Apply silicone grease to the O-rings to prevent them from sticking and being pulled out of
position.
5. Replace the mooring cap when damage or wear is visible on the sealing gasket.
Figure 9 Sealing gasket location
1 Mooring cap sealing gasket
Figure 9 and Figure 10.
English 15