While at normal sea speed the rudder...

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Question 1 of 205eccef9cbacbc34ba4d45a66

While at normal sea speed the rudder movement stops, but is restored after changing over power units. At the earliest opportunity the faulty power unit is restarted with the following results: the rudder can be remotely swung in only one direction, however using the trick wheel equal movement of the variable stroke control device from neutral is available.The probable cause is __________. See illustration GS-0123.

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🔍 Key Concepts

• Difference between remote control and trick wheel operation in an electro‑hydraulic steering system • Role of solenoid coils F1, F2, F3, F4 in shifting the hydraulic control valve for port vs starboard movement • How a loss of pressure vs. a control-direction fault would affect rudder movement in both directions

💭 Think About

• If the rudder moves freely in both directions with the trick wheel, what does that tell you about the pump (G) and the mechanical linkage (shaft K and follow‑up)? • If, on remote, the rudder moves in only one direction, which part of the system acts ONLY during remote electrical control and not during local mechanical operation? • Looking at GS‑0123, which solenoids are used to command port vs starboard, and what would happen if one of those coils burned out?

✅ Before You Answer

• Confirm that hydraulic power and pump discharge must be adequate if the rudder moves both ways with the trick wheel • Confirm that mechanical linkage (shaft K and variable stroke control device) is sound if equal movement from neutral is available manually • Focus on which single solenoid coil failure would prevent movement in one direction only on remote, while leaving local trick wheel operation unaffected

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