MSA AirHawk II Setup guide

MSAsafety.com
Maintenance and Repair
AirHawk® II Air Mask
Second Stage Regulator
Order No.: 10104241/02
Prnt. Spec. 10000005389(I)

1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
Phone 1-800-MSA-2222
Fax [phone]
For your local MSA contacts please go to our website www.MSAsafety.com
© MSA 2018. All rights reserved
WARNING!
Read this manual carefully before servicing the device. The device will perform as designed only if it is used
and maintained in accordance with the manufacturer's instructions. Otherwise, it could fail to perform as
designed and persons who rely on this device for their safety could sustain serious personal injury or death.
Please read and observe the WARNINGS and CAUTIONS inside. For any additional information relative to
use or repair, call 1-800-MSA-2222 during regular working hours.

3
AirHawk® II Air Mask
US
Contents
1 AirHawk II Second Stage Regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Second Stage Regulator Replacement Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 FireHawk Air Mask Second Stage Regulator Overhaul Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Second Stage Regulator Overhaul Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Height Gauge Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Parts List and Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.1 Non-CBRN Firehawk Second Stage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.2 CBRN Firehawk Second Stage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.1 Releasing Pressure from the SCBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Maintenance and Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.1 Removing the Regulator Cover and Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.2 Removing the Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.3 Disassembling the Bypass and Hose with Swivel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.4 Removing the Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.5 Disassembling the Regulator Housing Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.6 Removing the Seal Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.7 Valve Fork Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.1 Installing the Regulator Seal Ring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.2 Installing the Regulator Housing and Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.3 Installing the Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.4 Installing the Bypass and Hose Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2.5 Installing the Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.6 Installing the Regulator Cover and Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4AirHawk® II Air Mask
US
4 G1 AirHawk II Regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 Required Tools and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2 Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2.1 Non-CBRN, Model Number 7-2991-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2.2 CBRN, Model Number 7-2979-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3 Overhaul Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.4 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5 Maintenance and Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1 Regulator Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1.1 Removing the Regulator Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1.2 Installing the Regulator Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Regulator Bypass and Hose Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2.1 Removing the Regulator Bypass and Hose Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2.2 Installing the Regulator Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Regulator Spring and Spring Retainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.1 Removing the Regulator Spring and Spring Retainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 34
5.3.2 Installing the Regulator Spring and Spring Retainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.4 Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4.1 Removing the Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4.2 Installing the Diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.5 Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.5.1 Removing the Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.5.2 Installing the Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.6 Regulator Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.6.1 Removing the Regulator Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.6.2 Installing the Regulator Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.7 Regulator Seal Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.7.1 Removing the Regulator Seal Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.7.2 Installing the Regulator Seal Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.8 Regulator Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.8.1 Removing the Regulator Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.8.2 Installing the Regulator Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5
AirHawk II Second Stage Regulator
AirHawk® II Air Mask
US
1 AirHawk II Second Stage Regulator
1.1 Second Stage Regulator Replacement Kits
1.2 FireHawk Air Mask Second Stage Regulator Overhaul Kits
1.3 Second Stage Regulator Overhaul Kits
1.4 Height Gauge Kit
*(not required with Non-Purge Cover)
Description Item Part Number
Valve Assembly 10087295 10087305
Housing Assembly 10087301
Description Item Part Number
O-ring (2 required) 10023509
Non-CBRN
10030663
O-ring (2 required) 10037951
O-ring, Silicone, Red 697453
O-ring (2 required) 634669
O-ring 63198
Screen 10020784
O-ring (2 required) 10023509
CBRN
10048942
O-ring (2 required) 10037951
O-ring, Silicone, Red 697453
O-ring (2 required) 634669
O-ring 63198
Screen 10020784
Cap, Spring 10047528
Shield, CBRN 10044026
Description Item Part Number
Cap, string 10047528 10091435
Shield, CBRN 10044026
Seal ring (pack of 10) 10031192 10091436
O-ring (pack of 10) 10023509 10091437
O-ring (pack of 10) 10037951 10091438
Spring, button (pack of 10) 10018965 10091439
O-ring, silicone, red (pack of 10) 697453 10091440
O-ring (pack of 10) 634669 10091461
Description Item Part Number
Height gauge for P/N 10087295 10090457 10090458

6
AirHawk II Second Stage Regulator
AirHawk® II Air Mask
US
1.5 Parts List and Exploded View
1.5.1 Non-CBRN Firehawk Second Stage Regulator
19
5
12
34
4
811
10
2
6
9
1
14
13
16
7
20
18
7
15
13
17
14
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube

7
AirHawk II Second Stage Regulator
AirHawk® II Air Mask
US
Item Description Part number
1 O-ring, Silicone, Red 697453
2 O-ring, Fluro, Blue 634669
3 Diphragm, Silicone 10018540
4 U-clip 10018547
5 Retainer, Spring, Purge Cover ONLY 10018622
6 Knob, Bypass 10018774
7 Spring, Button 10018965
8 Body, Bypass 10018966
9 Insert, Bypass 10018971
10 Hose, Threaded 10020782
Hose, QC 10032940
11 Screen, Bypass 10020784
12 Spring, Diaphragm 10020931
13 O-ring, Viton, Black 10023509
14 O-ring, Buna-N, Black 10037951
15 Button, PTC 10024111
16 Button, STC 10024112
Button, PTC 10024111
17 Valve Assembly 10087295
18 Housing, Regulator 10087302
19 Cover, Purge 10026139
Cover, Non-Purge 10047406
20 Seal Ring 10031192
Christo-Lube Lubricant 604070

8
AirHawk II Second Stage Regulator
AirHawk® II Air Mask
US
1.5.2 CBRN Firehawk Second Stage Regulator
19
12
21
22
3 4 811
10
4
2
6
9
17
13
15
14
7
18
1
14
16
7
20
13
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
5

9
AirHawk II Second Stage Regulator
AirHawk® II Air Mask
US
Item Description Part number
1 O-ring, Silicone, Red 697453
2 O-ring, Fluro, Blue 634669
3 Diphragm, CBRN 10039172
4 U-clip 10018547
5 Retainer Spring (purge cover only) 10018622
6 Knob, Bypass 10018774
7 Spring, Button 10018965
8 Body, Bypass 10018966
9 Insert, Bypass 10018971
10 Hose, Threaded 10036171
Hose, QC 10046484
11 Screen, Bypass 10020784
12 Spring, Diaphragm 10020931
13 O-ring, Viton, Black 10023509
14 O-ring, Buna-N, Black 10037951
15 Button, PTC 10047238
16 Button, STC 10047331
Button, PTC 10047238
17 Valve Assembly 10087295
18 Housing, Regulator 10087301
19 Cover, Non-Purge 10047664
20 Seal Ring 10031192
21 Cap, Spring 10047528
22 Shield, CBRN 10044026
Christo-Lube Lubricant 604070

10
General Instructions
AirHawk® II Air Mask
US
2 General Instructions
WARNING!
Only certified C.A.R.E. technicians are approved to do the procedures in this manual.
Before starting any repair or maintenance procedure, make sure all pressure has been released from
the SCBA. Trying to disassemble a pressurized SCBA can cause parts to become airborne projectiles.
Failure to follow these warnings can result in serious personal injury or death.
CAUTION!
To prevent damage to the CBRN shield, touch only the rim.
2.1 Releasing Pressure from the SCBA
(1) Turn the handwheel clockwise to close the cylinder valve.
(2) Push the regulator release buttons.
(3) Turn the regulator bypass knob counterclockwise to open the regulator bypass valve and release pres-
sure from the SCBA.