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MacGregor / Porsgrunn / Cargotec (Finland/Norway)

Ram Type Steering Gear

Die Ram-Type (Kolben-Typ) Ruderanlage mit Rapson-Slide-Mechanismus ist die klassische Bauweise für große Seeschiffe. Hydraulische Kolben (Rams) bewegen über einen Tillerarm den Ruderschaft. Der Rapson-Slide-Mechanismus kompensiert den veränderlichen Hebelarm bei Ruderlage-Änderung. Standard auf VLCCs, Capesize-Bulkern und großen Containerschiffen seit den 1960er Jahren.

MacGregor / Porsgrunn / Cargotec (Finland/Norway) Ram Type Steering Gear
Torque 200-20,000 kNm
Capacity
Hydraulic Oil
Medium

Components & Design

Component data being added…

Technical Data

type Ram (Rapson Slide) Type Steering Gear
variant count approx 5
period start year 1960
drive type Electric-Hydraulic
construction Hydraulic rams, tiller arm, Rapson slide mechanism, dual HPU

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Common failures & inspection points

●Ram cylinder seal leakage causing rudder drift
●Tiller arm bushing wear from dynamic loading
●Rapson slide block wear after 20,000+ hrs
●HPU relief valve malfunction
●Emergency steering changeover valve sticking

Service & Maintenance

Hydraulic oil analysis every 6 months. Ram cylinder seal inspection at drydock. Tiller arm bushing clearance measurement at drydock. Rapson slide block inspection annually. SOLAS hard-over test. Emergency steering drill monthly.

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Replacement Parts

MacGregor/Porsgrunn/Cargotec. Lead time: 4-8 weeks. Ram seals: keep onboard. Rapson slide blocks: 6-10 weeks.
Equipment Model #37894 · ✓ still in production