Furuno CH-250 manual Hull Unit Maintenance, Lubrication, Manually raising, lowering transducer

6.3Hull Unit Maintenance

6.3.1Lubrication

Grease the raise/lower screw shaft once a year. Also, grease the raise/lower main shaft (upper part of the grease cotton retainer) twice a year. These parts can be accessed by removing the raise/lower drive assembly cover.

6.3.2Manually raising, lowering transducer

WARNING

Turn off the power at the ship's mains switchboard before conducting the procedure below.

Rotating motor can cause bodily injury.

1.Turn off the breaker on the hull unit.

2.Set 19 mm ratchet wrench to nut and turn.

3.Check that the transducer raises and lowers smoothly, from the upper to the lower limit positions. If the transducer cannot be raised smoothly, do not use excessive force; the shaft may bend, causing damage to other components.

4.Check soundome and tank. Remove marine life with fine sandpaper or piece of wood.

Attach ratchet wrench here.

Figure 6-1 Hull unit

6-2