BU 90F
Jastram GmbH & Co. KG BU 90F — Tunnel Thruster (Bow/Stern).
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Propeller condition: inspection for wear, material fatigue, cavitation damage and foreign objects
Shaft seal and seal rings: inspection for wear, oil leakage and water ingress (Viton seal rings, white metal seal)
Cathodic protection/sacrificial anodes: inspection of zinc coating (steel) and renewal at least annually
Tunnel opening and water flow: inspection for fouling (algae, barnacles), sludging and flow obstruction
Kavitationsschutzring: Überprüfung des Edelstahl-Schutzrings an der Propellerspitze auf Beschädigungen
Electric motor drive/couplings: inspection for wear, corrosion, misalignment and bearing wear
Pressure equalisation system and oil tank: inspection of oil level, oil quality, moisture content and leaks
Cavitation inspection: inspection for tunnel flooding during operation and noise/vibration inspection
Type-general inspection and maintenance points for this equipment category — not model-specific.
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