Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion

Contents

HDCSH-1 1.1 Head Cushion

HDCSH-1 1.1.1 Head Cushion Removal

HDCSH-1 1.1.2 Head Cushion Test Fit

HDCSH-2 1.1.3StuffingtheHeadCushionBag

HDCSH-3 1.2 Head Cushion Foam Trimming

HDCSH-3 1.2.1AddingEarphoneHolesto the Head Cushion

HDCSH-3 1.3 Head Cushion Foam Spacer (HCFS)

HDCSH-5 1.3.1 Installation of Head CushionFoamSpacer(HCFS)

HDCSH-6 1.3.2StuffingtheHeadCushionFoamSpacer(HCFS)

HDCSH-6 1.4 Chin Cushion

HDCSH-6 1.4.1StuffingtheChinCushion

HDCSH-7 1.5 Clean and Inspect

1.1 Head Cushion

B WARNINGA loose fitting head cushion will cause poor oral nasal mask fit resulting in CO2 buildup in the helmet. This condi-tion could lead to a build up in CO2 (Hypercapnia), possibly resulting in unconsciousness, serious injury or death.

The fit of the head cushion is critical to bothcomfortandsafety.Ingeneraltheheadcushionshouldbesnugfittingandhelpholdthehelmetto your head. The head cushion should also beadjustedsoitassistsintheproperfitoftheoralnasalmasktotheface.

The fit of the helmet is primarily determinedbythelayersofopencellfoamthatfilltheheadcushionbag.

B WARNINGNever dive with a Kirby Morgan hel-met without a properly functioning oral nasal mask. Without an oral na-sal mask, dangerous levels of carbon dioxide may accumulate in the helmet. This can lead to unconsciousness and death.

Theheadcushionispartofthehelmetcushion-ing system that includes thehead cushion, theheadcushionfoamspacerandthechincushion.

1.1.1 Head Cushion Removal

The head cushion is fastened into the helmetwithsnaps.Removetheheadcushionbyputtingahandatthebaseofthesnapandgentlysepa-ratingthesnapsoneatatime.

1.1.2 Head Cushion Test Fit

Fit test (follow these instructions if refitting orre-sizingtheheadcushion).

Makesuretheneckpadonthelockingcollarisadjustedcorrectlytothediversnecksizeandalsocheckthefitoftheheadcushionwiththelockingcollarintheclosedposition.

NOTE:Fordiverswithsmallersizedheadsuseoftheheadcushionfoamspacer(HCFS,P/N525-745)mightberequired.ItshouldbenotedthattheChinCushionP/N510-667analsobeusedtosafeguardproperfitofthediversfaceintotheoralnasalmask.

1)Snapchincushion(ifused)andheadcushioninto helmet.

2)Donthehelmetandevaluateifitisthecorrectfitorwillneedtobeadjusted.

©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015 HDCSH-1

Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion Head Cushion

NOTE: If the head moves, the helmet should follow.

1.1.3 Stuffing the Head Cushion Bag

There are a number of ways to stuff the headcushion with foam. Different combinations ofthe provided foam can be set up and foam canbetrimmeddependingondesiredfit.Thebelowstepsareintendedtoonlyaidandguidetheuser.

The components of the head cushion.

NOTE:TheneckpadfoamP/N510-832cangooneithersideofthetopfoamstripsP/N510-830,againsttheneckoragainstthehelmetshell.Theneckpadfoamisasizingtoolandcanberemovedorleftintheheadcushionbagtoensureproperfitandcomfort.

TIP:Firstchooseeithertherightorleftsideoftheheadcushionbagtobeginstuffingthe“eggshell” foam.

The “egg shell” side of the left and right side foams usually faces outward against the helmet shell.

Next insert the top foam, followedby theothersideof“eggshell”foamandfinishwiththewhiteneckfoampad.

HDCSH-2 ©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015

Head Cushion Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion

1.2 Head Cushion Foam TrimmingNOTE: The side “egg shell” foamsdonothaveearholes.Thisisintentional.Earholesmaybecutinifpreferred.Thetipsofthe“eggshell”sidecanbetrimmedoffifthesidefoamsaretootight.

The tips of the “egg shell” side can be trimmed off if the side foams are too tight.

1.2.1 Adding Earphone Holes to the Head Cushion

Using the template for general size and location, mark the desired area for cut out, if required.

Trim the ear hole into the foam using the guide line made from the Ear Hole Template

1.3 Head Cushion Foam Spacer (HCFS)Theheadcushionfoamspacer(HCFS)isasim-ple lengthof foam that isnested into theheadcushion.Thespacerhelpsproperlyposition thetopandbackoftheheadinthehelmetbyusingalargerfoampieceinthelowerneckareawhichhelpspushtheheadforward,andthenoseandmouthintotheoralnasalmask.

©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015 HDCSH-3

Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion Head Cushion Foam Trimming

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HDCSH-4 ©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015

Head Cushion Foam Trimming Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion

The components of the head cushion foam spacer (HCFS).

1.3.1 Installation of Head Cushion Foam Spacer (HCFS)

NOTE: In September of 2012 the head cush-ion foamspacer (HCFS)wasupgradedwithanelastic/Velcro®strapatthetopfrontpartoftheHCFSbag.ThisnewfeatureisintendedforusewithheadcushionsP/N510-754,orthe510-521whichhasmatingVelcro®patches.

NOTE:IfusingtheHCFSwithP/N510-682oraP/N510-521withoutaVelcro®patch,theelastic/Velcro® strapcansimplybe foldedover the topfrontportionbetweentheheadcushionandthehelmetshell,oritmaybetrimmedoffifdesired.

1)InstalltheHCFSintothetopinsideportionoftheheadcushion.Wraptheelastic/Velcro®straparound the front top edge and attach onto thematingVelcro®patchinfrontofthehangingloop.

The tag on the HCFS

and sewing seam should

be facing the back against the

head cushion.

Proper installation and alignment of the HCFS in the helmet.

©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015 HDCSH-5

Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion Head Cushion Foam Spacer (HCFS)

Hold the HCFS towards the back of the helmet when donning.

B CAUTIONEnsure that the HCFS is properly po-sitioned against the back of the head/neck and does not get caught between the helmet ring and the neck dam rings when closing the helmet. Failure to do so could result in an improper seal.

1.3.2 Stuffing the Head Cushion Foam Spacer (HCFS)

1)Stufftheneckfoamblockfirst,followedbythetopfoamintotheHCFSbag.ClosetheVelcro®.

NOTE:MatchtheshapeoftheneckfoamblockwiththeshapeoftheHCFSbag.

Match the shape of the foam

block with the shape

of the pocket.

Position sewing seam and tag on back side.

1.4 Chin CushionTheChincushionisfastenedtothehelmetwithtwosnapsandshouldrestonthediverschin.Thechinstrapistightenedontheoutsideofthechincushionastopressthechincushionsnugagainstthediverschin.

The chin strap is tightened on the outside of the chin cushion as to press the chin cushion snug against the divers chin.

1.4.1 Stuffing the Chin Cushion

Matchtheshapeofthechincushionfoamtothechincushionbag.

HDCSH-6 ©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015

Chin Cushion Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion

1.5 Clean and InspectThe cushion foam must be replaced when thefoambeginstocrumble.Loosecushionswillcre-ateasloppyfittothehelmetandcouldcausedis-comfortand/orinjurytothediver.

1)Cleanheadcushionbagusingmildsoapandwater.Rinsethoroughlyandhangdry.

2)InspecttheheadcushionbagtoensuretherearenoripsortearsinthematerialsandthatthesewingandVelcro®orzipperareingoodworkingcondition.Replaceifneeded;orderheadcushionbag,P/N510-722.

©MMXVIIIKirbyMorganDiveSystems,Inc.Allrightsreserved.Document#180503015 HDCSH-7

Head Cushion, Head Cushion Foam Spacer (HCFS) and Chin Cushion Clean and Inspect