KONGSBERG SR/SV Steering Servo Maintenance Comprehensive Guide

7.17 Filter replacement

Filter blockage will trigger an alarm or local indicator. Replacement steps:

Stop the corresponding pump.

Close the oil circuit plug from the expansion tank to the pump.

Put the bucket under the filter cup and unscrew the bottom drain plug (if any).

Remove the filter cup and replace the filter element.

Reinstall the filter cup, open the oil circuit plug, exhaust through the top of the distribution valve, and finally restore the pump to remote control mode.

7.18 Cleaning of Air/Oil Coolers

A complete process from simple backwashing to disassembly and cleaning is provided for B10/M10-30 type coolers. For stubborn dirt, a 5% phosphoric acid or oxalic acid solution can be used for rinsing, followed by rinsing with plenty of water. When disassembling and cleaning, attention should be paid to marking the order of the plates. After reassembly, the nominal width of the plate package should be controlled at 88.4mm to prevent damage.

7.19 Log file submission

The SG PMS system records operational data on the microSD card of the amplifier card. The file naming convention is RRYYMMDD.LOG. When submitting, if the vessel has two sets of left and right servos, separate emails should be sent and the servo identification number (left or right) should be indicated in the title. Before removing the SD card, press the remote SD card button and wait for the "SD card removal OK" LED light to turn off before safely removing it.

Chapter 8: Self assessment and Maintenance Inspection

Kongsberg provides a digital self-assessment checklist, and crew members can conduct self-assessment through the Kongsberg Mobile Forms app on iOS devices. It is recommended to complete the inspection in advance before entering the dock, so that there is enough time to handle spare parts and repair suggestions. Alternatively, maintenance inspections can be carried out by engineers from Kongsberg.

Chapter 9: Spare Parts Suggestions

To ensure rapid response, the manual recommends keeping the minimum number of spare parts on board, including:

Mechanical/hydraulic components: 4 filter elements, 2 load sensing valves, 2 proximity switches, 2 electromagnetic coils.

Control components: 1 phase loss relay, 2 relays, 2 selection cards, 1 pump control card, 1 power supply, 1 feedback potentiometer, and a 2-year consumable electrical spare parts package.

When ordering spare parts, detailed information such as ship name, servo model, IMO number, installation number, drawing number, and required quantity must be provided.