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CHAPTER 6
May/12
9107
SERVICE MANUAL
Page 612
Feb/11
CHAPTER 6
283
SERVICE MANUAL
ISO 9650
6.1.2 Fitting a new PRV
WARNING:
UNDER NO CIRCUMSTANCES SHOULD OLD COMPONENTS
BE MIXED WITH NEW COMPONENTS. REPLACE THE ENTIRE
PRV ASSEMBLY. DO NOT RE-USE ANY OLD COMPONENTS.
NOTE:
Ensure all surfaces are clean and dry before fitting the
new PRV.
(a) Push the valve body into the hole from which the faulty one was
removed.
(b) Assemble the valve body as shown in (FIGURE 604).
NOTE:
The ridged face of the clamp washer should be
positioned towards the buoyancy tube.
(c) Holding the valve body in place, through the buoyancy fabric,
hand-tighten the components of the PRV using the nut.
(d) While holding the PRV on the inside, use a calibrated torque
wrench and the correct adaptor tools, to tighten the PRV from
the outside. Please refer to Chapter 1, TABLE 101 for torque
settings.
WARNING:
ONLY THE TORQUE VALUE SPECIFIED SHOULD BE APPLIED.
WHEN THE CORRECT TORQUE IS ACHIEVED FOR THE FIRST
TIME, THE PRV MUST NOT BE TIGHTENED AGAIN. IF RE-
TIGHTENING IS NECESSARY A COMPLETE NEW PRV MUST
BE FITTED.
(e) The slit must then be repaired as detailed in this Chapter.
CAUTION:
ENSURE THE PRV CAP(S) HAVE BEEN REMOVED
BEFORE INFLATION.
(f) After waiting the required time for the repair to cure please
complete and record an air-holding test as described in Chapter
5. Record the relief and reseat pressures of the new PRV.
