Maintenance Manual
KONGSBERG PROPRIETARY.
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include this legend. ©2022 KONGSBERG - All rights reserved.
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Solenoid Y20a, Y20b, Y20c and Y20d activates and isolate the two systems, both pumps will be
brought into running condition and indication in bridge control panel and in the control cabinet shall
state Isolation Mode active.
2.
From bridge, apply direction order, first to port and then to starboard, notice the rudder
movement.
Expected outcome: the rudder movement shall be at expected speed for two pumps operation.
S21 Low-Low Oil Level System 1
–
By-pass System 1
S21 Low-Low Oil Level switch activates the bypass valve for
system 1. Operation of the steering gear shall be done using
pump 2 only.
1.
Activate S20 level switch and maintain activation through
all steps.
2.
Open the connection box and activate the test function by
pressing the coupling piece down as shown in the illustration. Maintain activation through all
steps. If test function not fitted, lift the S21 oil level switch above the oil level in tank to allow
the floater to activate the switch.
Solenoid Y21 activates and by-pass system 1, indication in bridge control panel and in the control
cabinet shall state Bypass System 1. Alarm Low-Low Level 1 activates in steering gear alarm panel.
3.
Ask bridge to stop pump 1, the 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.
4.
Release activation of S21.
System status returned to Isolation mode. Both pumps are brought into operation.
S22 Low-Low Oil Level System 2
–
By-pass System 2
S22 Low-Low Oil Level switch activates the bypass valve for
system 2. Operation of the steering gear shall be done using
pump 1 only.
1.
Activate S20 level switch and maintain activation through
all steps.
2.
Open the connection box and activate the test function by
pressing the coupling piece down as shown in the
illustration. Maintain activation through all steps. If test function not fitted, lift the S22 oil level
switch above the oil level in tank to allow the floater to activate the switch.
Solenoid Y22 activates and by-pass system 2, indication in bridge control panel and in the control
cabinet shall state Bypass System 2. Alarm Low-Low Level 2 activates in steering gear alarm panel.
3.
Ask bridge to stop pump 2, then to apply direction order, first to port and then to starboard,
notice the rudder movement.
