Kirby 77 3.5 Pre Dress-In Procedure

Kirby Morgan 77

sembly out away from the base of the helmet. Slightly

loosen the screws until the neck pad can slide back

and forth. Be sure each of the head cushion snaps

are attached to their corresponding ﬁtting inside the

helmet.

Pick up the helmet and pull the nose block device

knob out fully. Position the helmet on your head so

the oral nasal is in the proper position on your face,

covering your nose and mouth. Turn the sealed pull

pins to the locking position with the ridge on the pins

engaging the notch in t he sleeve and the pins fully

retracted.

Tilt your head forward so the locki ng co lla r/ neck pad

assembly may be swung forward and locked up into

its closed position. The sealed pull pins must snap

into place on the locking collar.

Lift your head back up and slide the neck pad forward

until it is snug but comfortable. Mark the position of

the neck pad on the locking collar using an indelible

marker. Pull the sealed pull pins out to their unlocked

position and let the locking collar open.

Remove the helmet. Position the neck pad plate on the

locking collar at the marked position and tighten the

screws on each side. After the adjustment screws are

tightened, don the helmet again, tilt your head forward

and lock the locking collar/neck pad assembly. Move

your head in various positions to make sure the pad

is adjusted for comfort.

The helmet is now adjusted for your head. It should

need no further adjustment unless another diver uses

the helmet.

3.5 Pre Dress-In Procedure

Before dressing in for a dive, inspection of the helmet

systems must be made to be sure it is in proper work-

ing order. This must be done well in advance of the

dive so any problems can be ﬁxed without delaying

the dive. The following steps are part of the recom-

mended daily maintenance.

3.5.1 Pre-Dive Visual Inspection

Visually inspect the exterior and interior of the hel-

met.

1) Inspect the regulator cover for any damage. The

purge button must work.

2) The neck dam must not be torn or punctured, and

properly trimmed to ﬁt.

3) Inspect the O-ring on the neck dam r ing assem-

bly. The O-ring must be in place, undamaged, and

lubricated.

4) Inspect the bent tube that supplies breathing gas

to the regulator. There must be no dents or kinks in

the assembly.

5) Inspect the face port. It must be in good condi-

tion.

6) Be sure the communications wires are hooked up

and tested.

7) Inspect t he oral/nasal mask. Make sure it is on

the regu lator mount nut properly and the valve is

installed properly.

8) Inspect the sealed pull pin on each side of the hel-

met. They must engage and disengage properly.

9) Make sure the head cushion and chin cushion are

properly fastened inside the helmet. The chin strap

should be open as wide as possible.

WARNING

There must be no holes in the neck dam.

If there are any holes in the neck dam the

helmet could leak or ﬂood. In addition,

the demand regulator will n ot opera te

properly. Drowning could result.

The O-ring on the neck dam ring assem-

bly on the Kirby Morgan helmet must be

in place and in good condition. I t must

be properly lubricated for smooth opera-

tion. Without a proper functioning O-ring

the helmet will leak and possibly ﬂood.

Drowning could result.

WARNING