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CHAPTER 6
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SERVICE MANUAL
ISO 9650
5. Repair damaged areas
5.1 All of the seams in
Revere Supply
liferafts, particularly the air holding seams,
are
formed using adhesive. The liferaft buoyancies, f
l
oor and canopy (non air
holding joints) are also held together with adhesive.
5.2 Note that a correct adhesive-jointed seam or assembly of PVC fabric and
adhesive, is very strong. It is possible to cause damage to the proofed coat
if careless attempts are made to tear apart two surfaces joined by adhesive,
particularly if forces are applied in a manner not normally found during
service.
WARNING:
UNDER NO CIRCUMSTANCES SHOULD THE HOT AIR GUN
BE USED IN CONJUNCTION WITH TOLUENE SOLVENT.
TOLUENE IS EXTREMELY FLAMMABLE AND SHOULD BE
KEPT AWAY FROM THE HOT AIR GUN.
NOTE:
to RELEASE ADHESIVE JOINTED SEAMS
or assemblies formed using PU adhesive, it is
recommended that one of the following techniques is
used, together with the careful use of a spatula or other
suitable tool.
- A hot air gun (max.temperature 70°C [158°F] ) or
- Toluene solvent.
5.3 Patches
Damage to pressure holding chambers requires the application of a single
patch for the repair, please refer to (FIGURE 601).
The outer patch provides additional mechanical strength to the damaged
area in addition to the cosmetic improvement to the damaged area. Marking
out patches should be done using a wax or chinagraph pencil. Never use a
ballpoint pen for this task.
5.3.1 Thoroughly clear the damaged area, trimming any frayed edges as
necessary.
5.3.2 Cut the outer patch so that it overlaps the area of damage by at least
25mm all round. Prepare the patch for gluing as per the requirements
in this Chapter.
5.3.3 Allow the adhesive to dry. Test it by touching the adhesive with the
back of a f
i
nger. If the adhesive is dry to the touch it is ready to be
applied.
