FS70 Trawl Sonar System
76 974-24007001/5.0
End of Fishing Season
The trawl unit package should be opened and the components cleaned with fresh water.
The trawl sonar head should be inspected for corrosion or damage. Service all connectors
and cover them with plastic. Store unit in a dry, clean area.
Every Twelve (12) Months Heavy usage or Every Two Years
Return the trawl sonar to a qualified Simrad service facility for inspection of connectors,
seals and shaft assembly. Have parts replaced as required.
Every Four Years
The trawl sonar head should be returned to a qualified Simrad service facility for
recalibration and upgrade to the latest specifications, and inspection of connectors and
housings for damage.
5.3.2.3 Connector Maintenance
Proper connector maintenance is crucial to the prevention of connector failure that may
result in failure of the sonar system and possible water damage to the sonar head. The
following steps should be taken whenever the connectors are assembled, or at regular
intervals as outlined in the “Maintenance Schedule” section above.
1. Wipe connectors clean of old grease and dirt with a lint free cloth.
2. Inspect the connector’s metal contacts and sealing surfaces for corrosion, wear or
damage. If problems are found, return the unit to a qualified Simrad service facility for
replacement of the connector!
3. Apply liberal amounts of Dow Corning “55” grease to each of the connector prongs and
to the sealing surfaces of the connectors. Do not use a silicone rubber adhesive
sealant!
4. Press connectors together until fully seated. Excess grease should be squeezed out of
the connector sockets.
5. Hands tighten the locking sleeve. Do not use a wrench or pliers!
6. When separating the connectors, avoid wrenching or bending connector.
WARNING: Failure to correctly maintain connectors may cause damage to the system
and will void the warranty.
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