MSA Firehawk 10043892 Setup guide

Firehawk®Second
Stage Regulator
TAL 113 (L) Rev. 8 © MSA 2011 Prnt. Spec. 1000000 389 (I) Mat. 100 1134
Doc. 10000017842
MAINTENANCE AND REPAIR

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
2
TAL 113 (L) Rev. 8 - 100 1134
Firehawk CBRN Mask Mounted Regulator
Regulator Assembly
10043892 10043893 10043894 10043895 10047529 10047600 10047601 10047602
Component
••••••••
••••••••
3Diaphragm, CBRN 10039172
3
••••••••
4U-Clip 10018547 ••••••••
••••
6Knob, Bypass 10018774 ••••••••
7Spring, Button 10018965 ••••••••
8Body, Bypass 10018966 ••••••••
9Insert, Bypass 10018971 ••••••••
•• ••
Hose,QC 10046484 • • • •
11 Screen, Bypass 10020784 ••••••••
12 Spring, Diaphragm 10092041 ••••••••
1 O-ring, Viton, Black 10023509 ••••••••
14 O-ring, Buna-N, Black 10037951 ••••••••
15Button, PTC 10047238 ••••••••
•• • •
Button, PTC 10047238
10087295
10087301
10047441
••••
17 Valve Assembly ••••••••
18 Housing, Regulator ••••••••
19 Cover, Non-Purge 10047664 ••••
20 Seal Ring 10031192 ••••••••
21 Cap, Spring 10047528 ••••••••
22 Shield,CBRN 10044026
Christo-Lube Lubricant
••••••••
••••••••
5Retainer Spring 10018622
••••
(purge cover
only)
Retainer, Spring

Regulator Assembly
10023684 10023685 10033112 10033113 10047534 10047535 10047536 10047537
Component
••••••••
••••••••
3Diaphragm, Silicone 10018540 ••••••••
4U-Clip 10018547 ••••••••
••••
6Knob, Bypass 10018774 ••••••••
7Spring, Button 10018965 ••••••••
8Body, Bypass 10018966 ••••••••
9 Insert, Bypass 10018971 ••••••••
10 Hose, Threaded 10020782 •• ••
Hose,QC 10032940 • • • •
11Screen, 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
10087295
10087302
••••
17 Valve Assembly ••••••••
18 Housing, Regulator ••••••••
19 Cover, Purge 10026139 ••••
Cover, Non-Purge 10047406
Christo-Lube Lubricant
••••
20 Seal Ring 10031192 ••••••••
*604070 ••••••••
(purge cover
only)
Retainer, Spring
Firehawk Mask Mounted Regulator
3TAL 113 (L) Rev. 8 - 100 1134
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

FIREHAWK SECOND STAGE REGULATOR DISASSEMBLY
REMOVING THE REGULATOR COVER, SPRING, AND
SPRING RETAINER
1. Press and hold the
housing buttons IN.
Also, press the regula-
tor housing retaining
latches IN.
2. Pull firmly on the regu-
lator cover to remove
the cover, spring, and
spring retainer from the
regulator housing.
Not : Do not stretch the spring.
REMOVING THE SPRING AND SPRING RETAINER
1. Push the outside center (rubber) regulator cover IN.
Not : Do not pull the spring to remove the spring retainer.
2. Lift up on the spring
retainer to remove it
from the regulator
cover.
REMOVING THE SPRING FROM THE SPRING
RETAINER
1. Twist the spring clockwise to remove it from the spring
retainer.
Not : Do not stretch the spring.
REMOVING THE DIAPHRAGM
1. Roll the diaphragm edges out of the regulator housing
groove.
2. Slide the diaphragm away from the red bypass hand-
wheel and slide the diaphragm off the valve fork.
REMOVING CBRN SHIELD
Car should b tak n wh n handling th CBRN shi ld.
Handl th shi ld by th plastic ring wh n r moving or
installing. Th CBRN shi ld must b r plac d accord-
ing to th apparatus ov rhaul sch dul r quir m nts
in th Flow T st s ction P/N 10051109.
1. Hold the shield by the
outer plastic ring when
removing or installing.
Lift the CBRN shield
Assembly and spring
cap off the diaphragm
assembly.
2. Lift the spring cap off
the CBRN Shield
Assembly.
3. Check the CBRN shield to ensure the shield is not
damaged. Inspect the shield for damage by holding
up to a light and checking the film surface for holes
prior to installing.
DISASSEMBLING THE REGULATOR HOUSING O-RING
1. Remove the o-ring from regulator housing outlet. Be
careful not to scratch the o-ring groove.
4
TAL 113 (L) Rev. 8 - 100 1134
CAUTION

FIREHAWK SECOND STAGE REGULATOR DISASSEMBLY
DISASSEMBLING THE BYPASS AND HOSE W/SWIVEL
1. Remove the regulator cover, spring, and spring retainer.
Not : DO NOT REMOVE THE DIAPHRAGM (option)
2. Use a small, flat-blade
screwdriver to remove
the u-clip from the reg-
ulator housing.
3. Remove the bypass and hose assembly from the reg-
ulator housing.
4. Remove the red bypass
handwheel. Slide the
handwheel back off the
bypass body to reveal
the u-clip in the bypass
body.
. Using a screwdriver,
remove the u-clip from
the bypass body.
6. Remove the hose
assembly by pulling the
hose out of the bypass
body.
7. Remove the hose
assembly o-ring. Be
careful not to scratch
the o-ring groove.
8. Inspect the second groove of the hose swivel. If dirty,
all dirt and foreign matter must be removed before
reassembling the bypass body.
9. Inspect the screen
inside the bypass body.
If dirty, all dirt and for-
eign matter must be
removed before reusing
the screen. If the
screen is damaged,
replace it as follows:
a. Insert a small screwdriver into the small hole side of
the bypass body and push the screen out the large
hole side of the bypass body.
INSPECTION OF THE VALVE FORK FOR PROPER
HEIGHT
1. Press the top of the
valve fork to ensure the
valve fork assembly
moves up and down
freely.
2. Use the height gauge to verify the fork height setting.
TAL 113 (L) Rev. 8 - 100 1134
Adjustment Wheel
Fork
Valve Locking Tab
Valve Housing
Valve
Support

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
Not : There are two different valve assemblies used in
Firehawk regulators. The correct gauge must be used for
the valve assembly part number being inspected. Use the
picture below to identify the correct gauge for the valve
part number being inspected.
3. Center the gauge between the center gap of the valve
fork. The valve assembly must be held vertical and
the fork must be not be prevented from moving freely.
4. The top of the valve fork must be within the accept-
able range of the gauge. If the top of the valve fork is
above the top edge of the acceptable range or if the
top of the valve fork is below the bottom edge of the
acceptable range the valve must be adjusted. Refer
to the next section for the proper adjustment proce-
dures.
ADJUSTING VALVE FORK HEIGHT FOR PROPER
PERFORMANCE
Normally the valve fork will not require adjustment and the
valve should not be adjusted as long as it is within the
acceptable range. If the valve fork is above or below the
acceptable range the valve must be adjusted to correct
the height of the fork. Depressurize and remove the valve
assembly from the regulator housing. Follow one of the
following procedures to correct the height of the fork.
Nominal height – Top of
fork level with center of
acceptable range.
Maximum height – Top of
fork level with top edge of
acceptable range.
Minimum height – Top of
fork level with bottom edge
of acceptable range.
ADJUSTMENT FOR VALVE FORK ABOVE THE
MAXIMUM RANGE
Above maximum height –
Top of fork above top edge
of acceptable range.
1. Slide the cylindrical valve housing slightly away from
the valve support. This will free the adjustment wheel
and allow it to rotate. The adjustment wheel cannot
6
TAL 113 (L) Rev. 8 - 100 1134
Gauge
P/N 100904 7
used for
Valve Assembly
P/N 1008729
Gauge
P/N 100 0146
used for
Valve Assembly
P/N 10030664
Acceptable
range

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
be turned unless the ribs on the wheel are free from
engaging the locking tab.
2. Turn the adjustment wheel clockwise to lower the fork.
3. Slide the cylindrical valve housing back into place
making sure that the valve lever and fork are not bind-
ing. The fork should move easily up and down when
pushed.
ADJUSTMENT FOR VALVE FORK BELOW THE
MINIMUM RANGE
Below minimum height –
Top of fork is below bottom
edge of acceptable range.
1. Slide the cylindrical valve housing slightly away from
the valve support. This will free the adjustment wheel
and allow it to rotate. The adjustment wheel cannot
be turned unless the ribs on the wheel are free from
engaging the locking tab.
2. Turn the adjustment wheel counter-clockwise to raise
the fork.
3. Slide the cylindrical valve housing back into place
making sure that the valve lever and fork are not bind-
ing. The fork should move easily up and down when
pushed.
DISASSEMBLING THE VALVE ASSEMBLY
1. Remove the regulator cover, spring, and spring retainer.
2. Remove the diaphragm.
3. Remove the u-clip from the regulator housing.
Not : Use the bypass body as a tool to remove the
bypass insert.
4. Insert the bypass body
into the regulator hous-
ing bypass port.
. Turn the valve counter-clockwise to unthread the
bypass insert from the valve.
6. Turn the regulator
housing until the
bypass insert drops out
of the regulator hous-
ing.
7. To remove the valve, turn the regulator housing upside
down, or lift the valve out of the regulator housing.
8. Replace all o-rings on
the bypass insert and
bypass body.
DISASSEMBLING THE REGULATOR HOUSING QC
BUTTON AND SLIDE BUTTON
1. Remove the old o-
rings. Be careful not to
damage the o-ring seal
area.
2. Pull firmly on the buttons to remove them from the
regulator housing. Be careful not to lose the spring.
7TAL 113 (L) Rev. 8 - 100 1134

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
REASSEMBLING THE DIAPHRAGM
1. Slide the diaphragm
knob into the valve fork
slot, then slide the
diaphragm toward the
red bypass handwheel.
2. Roll the diaphragm edges over the regulator housing
groove.
R moving Spring from Spring R tain r
1. Twist spring (clockwise) out of spring retainer.
Not : Do not stretch the spring
R moving Diaphragm Ass mbly
1. Roll diaphragm edges out of regulator housing groove.
2. Slide diaphragm away from red bypass handwheel
and slide the diaphragm off the valve fork.
R ass mbly Diaphragm Ass mbly
1. For only CBRN approv d Fir hawk, apply a skim
coat of Christo-Lube to the top rim of the regulator
housing.
2. For both CBRN and
Non-CBRN Fir hawk,
slide the diaphragm’s
knob into the valve
fork’s slot toward the
red bypass handwheel.
3. For both CBRN and Non-CBRN Fir hawk, roll the
diaphragm edges into the regulator housing groove.
R ass mbly R gulator Cov r
1. Insert spring into spring retainer by attaching last coil
of spring over the retainer’s hooks.
2. Push spring retainer over the center stem of regulator
cover.
3. Double check proper engagement by lifting on spring
retainer. Ensure that the retainer is engaged.
4. Push regulator cover, spring, and spring retainer onto
regulator housing.
Doubl ch ck prop r ngag m nt by pulling on r gu-
lator cov r to nsur that th r gulator cov r is
s cur ly attach d to th r gulator housing. Failur to
follow this warning can r sult in s rious p rsonal
injury or d ath.
Not : The following Section is for CBRN approved
Firehawk regulators only.
Installing CBRN Shi ld
1. Push the shut off buttons in for OFF position. While
installing the Shield, the valve fork must be in the UP
position.
2. Apply a thin coating of Christo-Lube to the bottom of
the Shield Assembly.
3. Place the CBRN shield over the diaphragm assembly.
4. Using finger, tap slight-
ly on the top of CBRN
shield to remove
trapped air.
. Replace spring cap.
INSTALLATION
Installing Spring into th N w Solid R gulator Cov r
Not : The new solid regulator cover does not use a spring
retainer.
1. Insert old spring into
solid cover
a. Sliding spring over finger, insert spring and finger
into the inside of solid cover.
8
TAL 113 (L) Rev. 8 - 100 1134
WARNING

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
2. Attach last coil of spring over the cover’s hooks
a. Holding the spring
centered in the solid
cover with finger,
insert thumb of other
hand down along the
inside of cover to the
bottom of spring.
b. Slip the last coil of spring over each of the three (3)
molded hooks at the bottom of cover.
c. Ensure that the last
coil of the spring is
engaged over each of
the three (3) molded
hooks.
Doubl ch ck prop r ngag m nt of solid cov r
spring by lifting on spring to nsur that th spring is
s cur ly attach d to th r gulator cov r. Do not
str tch th spring. Failur to follow this warning can
r sult in s rious p rsonal injury or d ath.
3. Push regulator cover and spring onto regulator hous-
ing.
Doubl ch ck prop r ngag m nt by lifting on r gula-
tor cov r to nsur that th r gulator cov r is s cur ly
attach d to th r gulator housing. Failur to follow
this warning can r sult in s rious p rsonal injury or
d ath.
REASSEMBLING THE REGULATOR COVER
1. To install the spring in the retainer, press the spring’s
last coil over the retainer hooks.
2. Push the spring retainer over the regulator cover cen-
ter stem.
3. Lift the spring retainer to check that the spring and
retainer are engaged properly.
4. Push the regulator cover, spring, and spring retainer
on the regulator housing.
Pull on th r gulator cov r to b sur th r gulator
cov r and r gulator housing ar s cur .
REASSEMBLING THE REGULATOR HOUSING O-RING
1. Apply a light film of Christo-Lube lubricant to the new
o-ring.
2. Roll the new o-ring over the end of the regulator hous-
ing outlet and seat it into the o-ring groove. If the o-
ring is not seated, it can cause an air leak.
REASSEMBLING THE BYPASS AND HOSE ASSEMBLY
1. Apply a light film of Christo-Lube to all o-rings.
2. Roll a new o-ring into the first groove of the bypass
body.
3. Insert the new screen (if removed). Insert screen into
the large hole (hose swivel) side of the bypass body.
Be careful not to damage the screen. Make sure the
screen is flat inside the body.
4. Roll a new O-ring into
the first groove of the
hose swivel.
. Apply a thin film of Christo-Lube lubricant (P/N
604070) into the second groove of the hose swivel.
6. Insert the swivel into
the bypass body.
9TAL 113 (L) Rev. 8 - 100 1134
WARNING
CAUTION
WARNING

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
7. Slide the u-clip through
the bypass body. The
u-clip should slide
through the bypass
body freely.
8. Slide the red bypass
handwheel over the
bypass body. The
handwheel hex lines up
with the handwheel.
9. Ensure that the hose with swivel moves freely.
10. Insert the bypass body
and hose assembly into
the regulator housing
so that the bypass
body tabs are lined up
with the slots in the
bypass insert.
11. Slide the u-clip through
the regulator housing.
The u-clip should slide
through the regulator
housing freely.
REASSEMBLING THE VALVE ASSEMBLY
1. Insert the valve into the regulator housing -- valve fork
slot facing up and away from the bypass port.
2. Push the valve into the regulator housing.
3. Insert the bypass insert
into the bypass port --
slot facing out.
4. Use the bypass body to thread the bypass insert into
the valve. Hand-tighten only.
Not : If the bypass insert does not thread into valve
assembly easily, the valve assembly is not aligned in the
regulator housing properly. Ensure that the valve assembly
is fully seated in the regulator housing.
. Insert the hose assembly and bypass body into the
regulator housing.
6. Insert the u-clip into
the regulator housing.
7. Replace the diaphragm.
8. Replace the spring, and regulator cover.
9. Thread the second stage hose to the first stage inter-
mediate pressure hose. Torque to 12 +/- in. lbs.
10. Check the valve assembly calibration. (See Inspection
for Valve Fork section.)
11. Flow test the air mask.
REASSEMBLING THE REGULATOR HOUSING QC
BUTTON AND SLIDE BUTTONS
1. Apply a light film of Christo-Lube to the new o-rings.
2. Install new o-rings on the button’s post.
Not : With the red bypass handwheel facing you and the
cap facing up, the slide button is to the left and the hous-
ing button is to the right.
10
TAL 113 (L) Rev. 8 - 100 1134

FIREHAWK SECOND STAGE REGULATOR REASSEMBLY
3. Install the spring. Align the buttons.
4. Push firmly on the buttons. Install the post o-ring on
the inside of the regulator housing.
. Double-check proper engagement by pulling on the
buttons to ensure that they are securely attached to
the regulator.
11 TAL 113 (L) Rev. 8 - 100 1134