Hollis Explorer User Manual - page 20
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BOV REASSEMBLY & CARE
• Clean the mushroom valve carrier O-ring and the groove around the
mushroom valve carriers. Lightly lubricate and refit new O-rings.
• Inspect the mushroom valve and mushroom valve carrier for damage.
Sanitize and remove any debris from the carrier.
• Clean the mushroom valve carrier O-ring and the groove around the
mushroom valve carriers. Lightly lubricate and refit the O-rings.
• Refit the mushroom valves to the carriers.
!
DANGER: DO NOT put lubricant on the mushroom valves.
• Having cleaned and sanitized the BOV; press the valve carriers into the
BOV. Ensure the O-rings around the mushroom valve carriers have not
extruded out of their grooves.
!
DANGER: Check the flow in the BOV. It should be from the diver's
left to diver's right (with the mouthpiece in the diver's mouth) (Fig.
2.15).
• Inspect and clean the rubber mouthpiece. Ensure there are no pin holes
or tears. Refit with a new cable tie, and tighten. Carefully, remove sharp
edges from the cable tie.
BOV PRIMARY TEST
In closed circuit mode, block the right hand (exhale) side and blow (do not
apply excessive force) into the mouthpiece. The inhale (diver's left side)
mushroom valve should seal and no gas should exit out of the second
stage exhaust or the front diaphragm.
Faults:
• Mushroom valve (inhale side) leak. Remove the carrier and inspect the
mushroom valve and O-ring. Replace as needed.
• BOV barrel O-ring or activation handle O-ring leak. Replace O-ring.
Fig. 2.15