Furuno TS-331A - Manual (Page 52)

6. CATCH SENSOR OPERATION
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6.6 Installing the Batteries and O-ring
The catch sensor is powered by three “D” alkaline batteries and battery life is
about 1,000 hours. When the battery voltage is low, the appropriate (yellow)
“active indicator” on the catch status indicator does not appear. When this occurs,
replace the batteries. It is also recommended to replace the O-ring whenever the
batteries are replaced. Replacement of the O-ring is not necessary if batteries
are being installed for the first time.
Necessary tools and parts
•
Socket wrench w/19 mm or 3/4-inch socket head
•
Slotted-head screwdriver
•
Three “D” alkaline batteries (International Standard Number R20)
•
O-ring (Parts no. 834-625-024)
•
Silicone grease (non-zinc type)
1. Use the socket wrench and socket head to unfasten the nut fixing the trigger
bolt. Remove the trigger bolt together with the trigger magnet housing. Clean
the trigger bolt with freshwater.
Nut
Trigger Bolt
Battery Cap
end
Polyurethane
Housing
Trigger Bolt
Trigger Magnet
Housing
TRIGGER BOLT
Transducer end
Catch sensor
2. Use the slotted-head screwdriver to remove the circlip at the battery cap end
of the catch sensor.
Circlip
Catch sensor, battery cap end