Maintenance manual
KONGSBERG PROPRIETARY.
This document and its accompanying elements contain KONGSBERG
information which is proprietary and confidential. Any disclosure, copying, distribution or use is prohibited if not
otherwise explicitly agreed with KONGSBERG in writing. Any authorized reproduction, in whole or in part, must
include this legend. ©2022 KONGSBERG - All rights reserved.
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4.
Steering Gear Actuator and Power Pack
The main components of the RV Steering Gear are illustrated below. The rotor, turning in bearings at
top and bottom, is equipped with vanes upon which the oil pressure is acting and thereby developing
turning torque. The turning movement is limited by stoppers fixed to the housing. The stoppers also
act as mechanical rudder stoppers in hard-over position. In addition to the stoppers, the actuator is
equipped with electrical limit switches stopping the turning movement at a predetermined angle.
The rudder carrier bearing of the actuator has sufficient capacity to carry the full weight of rudder,
rudderstock and rotor, eliminating the need for a separate rudder carrier bearing. The bearing is
lubricated by the system oil. The sealing system consists of synthetic oil resistant material resting in
seal grooves. The sealing system prevents both internal and external leakage from happening.
The Power Pack consists of two pump units, which may be operated together or separately. Each pump
unit provides oil with sufficient flow to develop the specified rudder angle. One pump unit is normally
in operation, while the other is acting as a stand-by unit. However, it is possible to run both pump units
simultaneously and thereby doubling the turning rate when shortest possible steering time is required
The pump units are remotely controlled at normal operation. For emergencies, they may be manually
operated from the Steering Gear room. However, installations can vary with individual variances.
Safety valve
Hydraulic nut
Actuator
Rudderstock
Stuffing Box
Foundation
Control valve
Power Pack
Oil tank
Filter
Pump unit