Leafield Marine C7 Installation and operating instructions

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C7 SERVICE ADVICE
The C7 valve is manufactured from quality materials and has been engineered to ensure a long life
in arduous Marine environments. In the unlikely event that you experience problems with this
product you may find the following notes helpful.
If the problem is Leakage read section 1, if it is Breakage read section 2.
Section 1 - LEAKAGE
First identify where the leak is coming from- see diagram below.
(a) Leakage from the Core Assembly.
This problem can be temporarily overcome by fitting the cap, as this is a secondary seal. To
permanently fix the problem, carry out the following operations: -
(i) With the buoyancy tube deflated and the valve in the closed position, remove the Cap, then
fill the valve with some warm soapy water. Open the valve by pushing the Spindle down and
turning anti-clockwise. Allow the water to drain through. Rinse through with plain water. Re-
check the valve for air tightness.
(ii) If leakage persists, use service tool C16605 with the buoyancy deflated and unscrew the
core of the valve by turning it anti-clockwise. Remove the core, noting the position of the
washer and its colour. If it is grey we would recommend that you discard it and fit the
improved black version. It is not necessary to fit the thin sealing gasket with this washer.
Apart from the colour, the improved washer can also be identified by the two thin circular
ridges on one side and four larger ridges on the reverse. Check the Rubber seal on the
valve core for dirt or damage. Check that the sealing face on the plastic core is clean and
undamaged. If the seal or core are damaged the core assembly must be replaced.
(iii) Refit the valve ensuring that the washer is replaced in the correct orientation (see picture
below for orientation) and tighten as tightly as you can using hand pressure on the tool.
Inflate the buoyancy tube and check for air tightness. We recommend that after around 24
hours the valve should be retightened to ensure it has fully seated. If leakage persists
contact your local repair shop.
CORE
NUT
CORE SEAL
SPINDLE
HOUSING ASSEMBLY
ASSEMBLY
FABRIC
CAP
STRAP
CAP SEAL
CAP
SPRING
WASHER
POSSIBLE
LEAK PATHS
PAST
WASHER
POSSIBLE
CORE LEAK

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(b) Leakage from the edge of the Valve.
(i) Using tool C16605, ensure that the valve is as tight as possible with hand pressure only.
(ii) If the leak persists, unscrew the valve core and remove. If the washer is grey, or there is a
thin sealing gasket fitted, discard these and fit the improved washer, which is black and does
not require a gasket. The two thin ridges on one side and 4 larger ridges on the other can
also identify the improved washer. Check the valve core for any damage in the area that
clamps against the washer. If this area is damaged, replace the core assembly. Make sure
that there are no tears or areas of damaged fabric where the valve clamps, if there are the
repair will have to be carried out by a repair shop.
(iii) Refit the valve, ensuring that the washer is replaced in the correct orientation and tighten as
tightly as you can using hand pressure on the tool. Inflate the buoyancy tube and check for
air tightness. We recommend that the valve is re-tightened after about 24 hours to ensure it
has fully seated. If the leakage persists, contact your local repair shop.
Washer Orientation
4 ridges:
This side against
the boat fabric
2 ridges:
This side
facing up

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Section 2 - BREAKAGE
(i) If the cap has been broken or the strap damaged, a new Cap/strap assembly can be
obtained from your spares supplier. The loop securing the cap to the valve can be cut using
a knife- being careful not to damage you or the raft fabric. The new loop can then be pushed
over the retaining features (start with the thickest part of the strap) and will clip into place
securing the cap firmly. Make sure the strap is the right way up before fitting, so there are
no twists in the strap when you screw the cap on.
(ii) If the core of the valve is broken it can be replaced. See the previous section for information
on how to remove and refit it.
I hope your repair went well and our products go on to give you long and reliable service. If you
have any comments concerning our products or these sheets please feed them back to us via your
local spares supplier. We are always trying to improve our service and products; feedback helps us
to do this.