Imo Oil Level Detection - Kongsberg Frydenbo IRV-2 Maintenance Manual

Steering gear

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Maintenance Manual

By the mode selector, select position 4, By-pass System 1 Locked. Isolation mode and by-pass

system 1 activated.

Ask bridge to stop pump 2.

Apply a steering command from pump 1 using manual steering lever.

Expected outcome: no rudder response as the system is by-passed.

Ask bridge to start pump 2 and stop pump 1, then to apply direction order, first to port and

then to starboard, notice the rudder movement.

Expected outcome: rudder movement at the speed of two pumps operation.

Selector switch pos. 5 By-pass System 2 Locked

Prior to the test, establish communication with the bridge, and keep both pumps running and NFU

steering mode activated.

By the mode selector, select position 5, By-pass System 2 Locked. Isolation mode and by-pass

system 1 activated.

Ask bridge to stop pump 1.

Apply a steering command from pump 2 using manual steering lever.

Expected outcome: no rudder response as the system is by-passed.

Ask bridge to start pump 1 and stop pump 2, then to apply direction order, first to port and

then to starboard, notice the rudder movement.

Expected outcome: rudder movement at the speed of two pumps operation.

Return selector switch to position 1.

11.14.3

To verify the function of the level switches in the oil tanks, please follow the procedure below.

S25 Common Oil Level

S25 Common Oil Level activates an alarm only. IMO system is not activated.

Activate the level switch by pushing the black ball handle and hold for 10 seconds. The ball

handle is connected to a lever which will move the floater and activate the level switch.

S20 Low Oil Level – Isolation mode

S20 Low Oil Level switch activates the isolation valves and separates the two hydraulic systems.

Operation of the steering gear shall be done using both pumps.

Activate the level switch by pushing the black ball handle. The ball handle is connected to a

lever which will move the floater and activate the level switch. Maintain activation through all

steps including test of by-pass system 1 and 2.

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