SERVICE MANUAL
Page 507
CHAPTER 5
9107
May/12
CHAPTER 5
Page 507
Feb/11
283
SERVICE MANUAL
ISO 9650
3.3.6 Insert a deflator pin into the vacuum valve body and leave the liferaft
to settle to atmospheric pressure. (This takes approximately 5-10
minutes). When atmospheric pressure has been reached, a pressure
reading will return 0 p.s.i.
3.3.7 Calculate the % gain of pressure (equal to the percentage loss of
vacuum). This is calculated as follows:
%
gain
= 100
{
(Start
Pr
essure
–
End
Pr
essure)
}
Start
Pr
essure
3.3.8 Fit the plug provided with the H-Pack (Item 1 FIGURE 503). Torque
plug into vacuum valve body, using the correct tool and a calibrated
3/8” square drive torque wrench. Ensure that silicone grease doesn’t
come into contact with any threadforms on the plug or vacuum valve
body.
NOTE:
The plug supplied with H-Pack has an integral O-ring
(Item 3 FIGURE 503). Silicone grease is already
provided on the O-ring. This is suff
i
cient for re-f
i
tting
the plug directly, provided the plug has been kept free
of contaminants and grease provided hasn’t been wiped
off. If in any doubt, remove the O-ring using a suitable
non-sharp implement and discard. Clean the plug using
a clean lint-free cloth and ref
i
t a new O-ring coated
liberally with silicone grease.
Exploded diagram of vacuum valve
FIGURE 503
