Stuffing Box (If Kongsberg Delivery) - Kongsberg Frydenbo IRV-2 Maintenance Manual

Steering gear

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Maintenance Manual

When manufacturing the Walker seal, each ring is cast in one piece in a mold. The reverse side of the

Walker seal is made from a synthetic rubber-proofed cotton fabric and the lip from a high nitrile

base, synthetic rubber with a hardness of 80 IRHD.

The walker seal ring is equipped with a compression element with a length of 30-50 mm depending

on size of ring. After the casting is complete, the ring is split in the middle of this compression

element. This compression element is made of rubber only, and the purpose of this element is to

absorb the necessary compression created at installation. In special cases, it can be used for small

adjustment of the length of the Walker seal prior to installation.

During installation, there should be a pressure in the joint, leading to pressure in the compression

element. Without this pressure, there will most likely be a leakage in the joint since the ends of the

Walker seal can slide away from each other. The gap created will then lead to a leakage.

Seal lubrication:

A liberal lubrication during assembly will ensure lubrication from the start. During operation, the

seals should be checked on a weekly basis and grease added once a month as necessary.

Preparations:

The Stuffing Box should be mounted on a levelled deck. In order to avoid sea water from

penetrating between Stuffing Box housing and deck a separate seal between deck and housing to be

used. A seal for this purpose is supplied with the Stuffing Box. The maximum curvature on the

levelled deck when using this seal is 1 mm across the Stuffing Box surface.

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

Stuffing Box (if KONGSBERG delivery)

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