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Kongsberg Maritime AS

Kongsberg Jet Control System - Extended

Name: Kongsberg Maritime AS Kongsberg Jet Control System - Extended
Brand: Kongsberg Maritime AS
SKU: OSE-64738

The Kongsberg Jet Control System – Extended is an integrated hydraulic control and monitoring solution for controllable‑pitch propeller (CPP) shafts, providing precise thrust regulation and rapid pitch changes.

Inspector Detail

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Common issues

Position feedback sensor drift causing indicated pitch to disagree with actual blade angle
Hydraulic power pack pump or filter degradation reducing response speed
Servo/proportional valve sticking from oil contamination
Cable and connector corrosion in the engine room environment affecting signal integrity
Control cabinet/PLC card faults after long service periods

Inspection checklist

Verify pitch feedback indication against actual blade angle at reference positions
Check hydraulic power pack oil level, cleanliness and filter differential pressure
Test alarm and monitoring functions from the bridge and local control positions
Confirm emergency/local backup control mode operates correctly
Inspect cabling, glands and connectors for corrosion or chafing
Check servo valve response time against baseline

Service intervals

Hydraulic oil and filter change	per manufacturer schedule, condition-based on oil analysis and filter differential pressure
Feedback sensor calibration check	annually or per class PMS
Backup/emergency control function test	per class requirement, typically at each survey

Critical spares

Hydraulic filter elements
Position feedback sensor
Servo/proportional valve
Power pack pump

Safety

Hydraulic system operates under pressure - depressurise before opening
Electrical control cabinets present shock hazard - isolate before internal work
Loss of pitch control affects manoeuvrability - always confirm the emergency/backup control mode works before it is needed operationally

Class survey

Function and alarm testing of the propulsion control system, including backup/local control, is typically required at periodic survey rather than a fixed teardown.

Estimated lifetime: As a control/hydraulic system rather than a mechanical wear component, service life is generally driven by component obsolescence and hydraulic contamination control rather than running hours - electronic components are commonly reviewed on a 10-15 year horizon.