Crewsaver -
Servicing Manual: Crewsaver Crewfit 275 Lifejacket
Date: November 2016
Issue No: 14
Page
of 43
21
When replacing automatic operating heads it is important to note that the Mk. 5 operating heads must not
be fitted to the old design of manifold (FIGURE 1). FIGURE 2 shows the gas flange fitted on jackets since
1993 and which is suitable for both the Crewsaver and the United Moulders Mk. 5 heads.
If fitted with the old design manifold and a new auto head is needed then the jacket must be returned to
Crewsaver for a new inflation chamber to be fitted or, depending on the general condition of the cover, the
jacket must be declared as Beyond Economic Repair. All lifejackets with the old design manifold will be at
least 20 years old.
The reason for this is that the gas entry holes in the head and manifold no longer line up exactly and so the
gas entry is restricted causing potentially slow inflation or icing especially in cold conditions. The undercut
on the current design provides the additional clearance needed.
Replacing Automatic Heads - manifold types to be considered
3
Section
Fig 3.5 Manifold Types
