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This hydraulic oil motor operates on the principle of rotary vanes, utilizing a specific torque output detailed in the manufacturer's specifications. The Aalborg-OL, manufactured by Alfa Laval Aalborg A/S, is designed for marine applications and boasts DNV approval, as evidenced by model number TAP00001RN found in the DNV approval finder. Common failures observed with this model include leakage in the rotary vane seal, leading to internal bypass, damage to the HPU motor bearings after 30,000+ hours of operation, issues with magnet valve clamps due to oil contamination, and drift in the rudder position feedback system calibration. To ensure optimal performance, Alfa Laval Aalborg A/S recommends keeping a seal kit and solenoid valves readily available, with lead times for these spares ranging from 3 to 8 weeks. Regular maintenance includes hydraulic oil analysis every six months and inspection of the vane seal during docking. Additionally, SOLAS Hard-Over testing (28 seconds) and monthly emergency steering drills are essential for safe operation.
What our service work and the manufacturer documentation say about keeping this model running.
Hydraulic oil analysis every 6 months. Blade seal inspection at drydock. SOLAS hard-over test (28 seconds). Emergency steering drill monthly.
Alfa Laval Aalborg A/S: Keep a seal kit and solenoid valves on board. Lead time: 3-8 weeks.
Verified against the DNV Approval Finder — the certificate below is issued by DNV, not by us.
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