Self-Contained Breathing Apparatus (Scba) Facepiece Adjustment; Ratchet Adjustment - MSA Cairns 1010 Manual De Uso

3.2

Self-Contained Breathing Apparatus (SCBA) Facepiece Adjustment

MSA Cairns Traditional and Modern fire helmets are equipped with an exclusive interface that allows
firefighters to wear them comfortably and safely with most SCBA facepieces. The exclusive design
allows the fire helmet to rest in the proper position for a secure fit of both the fire helmet and facepiece.
Do the following to verify and make adjustments for the optimum fit of the SCBA:
(2)
(3)
(4)
(5)
3.3

Ratchet Adjustment

To provide maximum protection, make sure to adjust the fire helmet properly. Tightening the ratchet
beyond its limits can cause damage to internal gears and result in reduced protection.
(1)
US
Model
1010 and 1044, black impact cap
1010 and 1044, grey impact cap
880
660C, 664, 360S, 360R, and 360R-13
N5A and N6A
(3)
8
Turn the fire helmet upside down.
Pull the front headband toward the center of the fire helmet to disengage the hook-and-loop
material.
Lower or lift the front headband, as applicable.
Press the hook-and-loop material together.
WARNING!
Turn the ratchet knob counterclockwise (left) to open the headband.
Lower the ear cover over your ears and the ratchet knob.
(1) Check the fit of the fire helmet against the top of the SCBA
facepiece.
• If the SCBA facepiece fits without lifting the fire helmet or
creating gaps, no adjustment is necessary.
• If there is a gap between the fire helmet and the SCBA
facepiece, continue with Step 2 to lower the front headband.
• If the fire helmet is being pushed upward by the SCBA
facepiece, continue with Step 2 to lift the front headband.
(2) Put the fire helmet on your head. While holding the fire helmet
down on your head, push the ratchet knob inward and turn it
clockwise until the fire helmet is snug and comfortable. The
ratchet adjusts in 1/8-in. (0.3-cm) increments.
Headband Adjustment Size
6-3/8 to 8-3/4 in. (16.2 to 22 cm)
6-3/8 to 8-3/8 in. (16.2 to 22 cm)
5-5/8 to 7-5/8 in. (14.3 to 19.4 cm)
6-3/8 to 8-3/8 in. (16.2 to 21.3 cm)
6-3/8 to 7-1/2 in. (16.2 to 19 cm) (medium)
7-5/8 to 8-3/8 in. (14.3 to 21.3 cm) (large)
MSA Cairns Fire Helmets