Ram Type Steering Gear
medium
Hydraulic ram (cylinder) type steering gear for large vessels
Known Models (2)
Kawasaki Marine Ram Steering Gear
Up to 80,000 kNm
· Hydraulic Oil
· Ram Hydraulic
type: Ram Hydraulic
Common Failures:
- • Ram gland packing leakage
- • Pump relief valve weeping
- • Autopilot interface fault
- • Tiller key wear
Service: Standard on Japanese-built tonnage. Ram seal inspection at drydock. Hydraulic oil change every 2 years.
Spares: Kawasaki: Dichtungssatz und Magnetventile an Bord vorhalten. Lead time: 3-8 Wochen.
Rolls-Royce (Kongsberg) TENFJORD Ram Type
Up to 100,000 kNm
· Hydraulic Oil
· 4-Ram Hydraulic
type: 4-Ram Hydraulic
Common Failures:
- • Ram cylinder seal leakage
- • Tiller arm pin bushing wear
- • Hydraulic lock valve failure
- • Oil cooler fouling
Service: 4-ram design for largest vessels. Redundant hydraulic circuits per SOLAS. Check ram clearances at drydock. Emergency steering test monthly.
Spares: Rolls-Royce (Kongsberg): Dichtungssatz und Magnetventile an Bord vorhalten. Lead time: 3-8 Wochen.