MSA FireHawk M7 Setup guide

TAL 114 (L) Rev. 7 © MSA 2011 Prnt. Spec. 1000000 389(I) Mat. 10093086
Doc. 10093086
Firehawk®M7
Second Stage
Regulator
MAINTENANCE AND REPAIR

2
TAL 114 (L) Rev. 7 - 10093086
FIREHAWK M7 SECOND STAGE REGULATOR
Firehawk M7 Second Stage Regulator Replacement and Overhaul Kits
Item PN Descripti n
110047441 Cover, Purge ••••
10047664 Cover, Non Purge ••••
2 10018622 Reta ner, Spr ng (not req’d w/ Sol d Cover) ••••
3 10092041 Spr ng, D aphragm ••••••••
4 10047528 Cap, Spr ng ••••••••
5 10044026 Sh eld, CBRN ••••••••
6 10039172 D aphragm, CBRN ••••••••
7 10087295 Valve Assembly ••••••••
8 10047238 Button, Push to-Connect ••••••••
9 10023509 O-R ng (2 Requ red) ••••••••
10 10037951 O-R ng (2 Requ red) ••••••••
11 10018965 Spr ng, Button ••••••••
12 697453 O-R ng, S l cone, Red ••••••••
13 10018971 Bypass Insert ••••••••
14 10018774 Knob, Bypass ••••••••
15 634669 O-R ng ••••••••
16 10018547 U-Cl p (2 Requ red) ••••••••
17 10018966 Body, Bypass ••••••••
18 10020784 Screen, Bypass ••••••••
19 10039171 Hose, Threaded •• ••
19a 10046484 Hose, Qu ck-Connect • •••
20 10087301 Hous ng Assembly ••••••••
21 10031192 Seal R ng ••••••••
22 10047331 Button, Sl de-to-Connect •• • •
604070 Chr sto-Lube Lubr cant ••••••••
10043892 10043893 10043894 10043895 10047529 10047600 10047601 10047602
Parts List
P/N Descripti n
Firehawk M7 Sec nd Stage Regulat r Replacement Kits
10087305 10087295 Valve Assembly
10087301 Hous ng Assembly
10087295 Valve Assembly
10087301 Hous ng Assembly
Firehawk M7 Sec nd Stage Regulat r Overhaul Kits
10023509 O-R ng (2)
10037951 O-R ng (2)
697453 O-R ng, S l cone, Red
634669 O-R ng (2)
63198 O-R ng
10048942 10020784 Screen
10047528 Cap, Spr ng
10044026 Sh eld, CBRN
10031192 R ng, Seal
10039172 D aphragm Assy.
809028 Lubr cant, Chr sto-Lube
10091435 10047528 Cap, Spr ng
10044026 Sh eld, CBRN
10091436 10031192 Seal R ng (Pack of 10)
10091437 10023509 O-R ng (Pack of 10)
10091438 10037951 O-R ng (Pack of 10)
10091439 10018965 Spr ng, Button (Pack of 10)
10091440 697453 O-R ng, S l cone, Red (Pack of 10)
10091461 634669 O-R ng (Pack of 10)
10100035 10092041 Spr ng, CBRN (Pack of 28)
10100036 10020931 Spr ng, PD (Pack of 28)
Height Gauge Kits
10090457 10090457 He ght Gauge for PN 10087295 w/ nstruct ons
10050211 10050146 He ght Gauge for PN 10030664 w/ nstruct ons
Regulat r Assembly

3TAL 114 (L) Rev. 7 - 10093086
FIREHAWK M7 SECOND STAGE REGULATOR
13
12
3
4
5
617 18
15
16
15
14
7
9
8
10
11
20
12
22
21
11
10
9
8
16
19
19a
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube

FIREHAWK M7 SECOND STAGE REGULATOR
FIREHAWK M7 SECOND STAGE REGULATOR
DISASSEMBLY
Removing the Regulator Cover and Spring
1. Remove the regulator cover.
a. Press and hold the
release buttons while
pressing the regula-
tor housing retaining
latches.
Note: Do not touch the cover while pressing the release
buttons and retaining latches. Let the spring act on the
cover.
b. Allow the cover to
drop into your palm.
c. Remove the spring,
and spring retainer
from the regulator
housing.
d. Turn the spring clockwise to remove it from the
retainer.
Note: Do not stretch the spring.
Removing the Diaphragm
1. Remove the CBRN Shield.
Handle the CBRN Shield by the rim only.
a. Lift the CBRN Shield Assembly and Spring Cap off
the diaphragm assembly.
b. Lift the Spring Cap off the CBRN Shield Assembly.
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TAL 114 (L) Rev. 7 - 10093086
Table of Contents
Disassembly
Regulator Cover and Spring . . . . . . . . . . . . . . . . . . . . .4
Diaphragm ...................................4
Bypass and Hose with Swivel . . . . . . . . . . . . . . . . . . . .
ValveAssembly ...............................6
Regulator Housing Buttons . . . . . . . . . . . . . . . . . . . . . .6
Inspection of the Valve Fork for Proper Height
Acceptable Valve Fork Heights . . . . . . . . . . . . . . . . . . .7
Adjusting Valve Fork Height for Proper Performance . .7
Adjustment of Valve Fork if Above the Maximum . . . . .8
Adjustment for Valve Fork if Below the Minimum . . . . .8
Reassembly
SealRing ....................................8
Regulator Housing and Buttons . . . . . . . . . . . . . . . . . .9
ValveAssembly ...............................9
Bypass and Hose Assembly . . . . . . . . . . . . . . . . . . . .10
Diaphragm ..................................11
CBRNShield ................................11
Regulator Cover and Spring . . . . . . . . . . . . . . . . . . . .11

2. Roll the edge off the
regulator housing.
3. Slide the diaphragm
away from the bypass
handwheel off the
valve fork.
Disassembling the Bypass and Hose with Swivel
1. Remove the regulator cover, spring, and spring
retainer.
Note: It is not necessary to remove the diaphragm.
2. Use a small, flat-blade
screwdriver to remove
the U-clip.
3. Remove the bypass
knob.
4. Remove the bypass
body U-Clip.
. Remove the bypass
and hose assembly by
pulling the hose out of
the bypass body.
6. Remove the hose
assembly o-ring. Be
careful not to scratch
the o-ring groove.
7. Inspect the second groove of the hose swivel. If dirty,
all dirt and foreign matter must be removed before
reassembling the bypass body.
8. Use the plastic stick or
small flat blade screw-
driver to push the
screen out of the
bypass body. Inspect
the bypass screen.
Remove all dirt and for-
eign matter before rein-
stalling the screen.
FIREHAWK M7 SECOND STAGE REGULATOR
TAL 114 (L) Rev. 7 - 10093086

FIREHAWK M7 SECOND STAGE REGULATOR
Removing the Valve Assembly
1. Remove the regulator cover, spring, and spring retain-
er. (See Removing the Regulator Cover, Spring, and
Spring Retainer)
2. Remove the diaphragm. (See Removing the
Diaphragm)
3. Remove the U-clip from the regulator housing. (See
Disassembling the Bypass and Hose with Swivel)
4. Remove the bypass insert.
Note: Use the bypass
body as a tool to unscrew
the bypass insert.
a. Use the o-ring
removal tool to
remove the bypass
insert.
. Lift the valve out of the
regulator housing.
Disassembling the Regulator Housing Buttons
1. Remove the old
o-rings. Be careful not
to scratch the o-ring
groove.
a. Discard the ring.
2. The spring will push
the button from the
housing.
a. Be careful not to lose the spring.
b. Remove the old o-ring. Be careful not to scratch the
o-ring groove.
c. Discard the o-ring
Removing the Seal Ring
1. Use the o-ring removal
tool to remove the seal
ring.
a. Discard the seal ring.
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TAL 114 (L) Rev. 7 - 10093086

FIREHAWK M7 SECOND STAGE REGULATOR
Inspection of the Valve Fork for Proper Height
Inspect and adjust valve fork height with the valve fork
pointing toward you. The valve fork assembly must move
up and down freely.
1. Press the top of the
valve fork to check
movement.
2. Use the Height Gauge to verify the fork height setting.
Note: Firehawk regulators use one of two valve assem-
blies: P/N 100904 8 or P/N 10030664. Use the appropri-
ate Gauge.
*See Firehawk M7 Second Stage Regulator
Replacement and Overhaul Kits/Height Gauge Kits for
ordering information.
3. Center the Gauge in the valve fork.
Note: Ensure that the valve assembly is vertical and can
move freely.
4. The top of the valve fork must be within the accept-
able range.
Acceptable Valve Fork Heights
Nominal height – Top of
fork level with center of
acceptable range.
Maximum Height – Top of
fork level with top of
acceptable range.
Minimum Height – Top of
fork level with bottom of
acceptable range.
7TAL 114 (L) Rev. 7 - 10093086
If your valve assembly looks like this:
Use this height gauge
If your valve assembly looks like this
Use this height gauge
Acceptable
range
Valve Assembly Height Gauge*
PN 10087295 PN 10090457
Valve Assembly Height Gauge*
PN 10030664 PN 10050146
Adjustment Wheel
Fork
Valve Locking Tab
Valve Housing
Valve
Support

FIREHAWK M7 SECOND STAGE REGULATOR
Note: If the top of the valve fork is above or below the
acceptable range, adjust the valve. Normally the valve
fork will not require adjustment. Do not adjust the valve if
the fork is within the acceptable range.
Adjusting Valve Fork Height for Proper Performance
Adjustment of Valve Fork if Above the Maximum
Inspect and adjust valve fork height with the valve fork
pointing toward you. Turn the Adjustment Wheel clock-
wise to lower the fork. Turn the Adjustment Wheel coun-
terclockwise to raise the fork.
Above maximum height –
Top of fork above top of
acceptable range.
1. Slide the adjustment when and valve housing slightly
away from the valve support to allow the adjustment
wheel to rotate.
Note: The adjustment wheel cannot turn unless the ribs
are free from the locking tab.
2. Turn the adjustment wheel clockwise to lower the fork.
3. Slide the adjustment wheel and valve housing back
into place. Ensure that the valve lever and fork do not
bind. The fork should move up and down easily.
Adjustment for Valve Fork if Below the Minimum
Below minimum height –
Top of fork is below
acceptable range.
1. Slide the adjustment wheel and valve housing slightly
away from the valve support to allow the adjustment
wheel to rotate.
2. Turn the adjustment wheel counterclockwise to raise
the fork.
Note: The adjustment wheel cannot turn unless the ribs
are free from the locking tab.
3. Slide the valve housing back into place. Ensure that
the valve lever and fork do not bind. The fork should
move up and down easily.
Firehawk Second Stage Regulator Reassembly
Installing the Regulator Seal Ring
1. Apply a thin film of Christo-Lube lubricant (P/N
604070) to the new o-ring.
2. Roll the new o-ring
onto the regulator out-
let and seat it into the
o-ring groove.
Note: An unseated seal can cause an air leak.
8
TAL 114 (L) Rev. 7 - 10093086
Ribs
Locking
Tab
Ribs
Locking
Tab
Ribs
Locking
Tab
Ribs
Locking
Tab

FIREHAWK M7 SECOND STAGE REGULATOR
Installing the Regulator Housing and Buttons
P/N 10047331
P/N 10047238
1. Apply a thin film of Christo-Lube lubricant (P/N
604070) to the new o-rings.
2. Install new o-rings on
the button posts.
3. Install the springs.
4. Align the buttons.
Note: With the bypass at 9:00 o’clock, the slide button is
at 12:00 o’clock and the housing button is at 6:00 o’clock.
. Push firmly on the buttons.
6. Double check proper engagement by pulling on the
buttons.
7. Reinstall the diaphragm.
8. Reinstall the spring and regulator cover.
9. Connect the Second Stage hose to the First Stage
Intermediate Pressure Hose.
a. Use a torque wrench and 3/4” crow foot to tighten
to 12 ± in lbs.
10. Check Valve Fork Height. (See Adjusting Valve Fork
Height for Proper Performance)
11. Flow Test the SCBA. (See Flow Test and Overhaul
Requirements, P/N 100 1109)
Installing the Valve Assembly
P/N 1008729
P/N 10030664
1. Insert the valve into the
regulator housing with
the valve fork up and
facing away from the
bypass port.
2. Push the valve into the regulator housing.
3. Reinstall the bypass insert.
a. Install a new o-ring.
i. Protect the o-ring
with tape or a thin
piece of paper.
ii. Apply a small amount of Christo-Lube lubricant
(P/N 604070) to the o-ring.
iii. Slip the o-ring
over the thread.
iv. Remove the protective tape or paper.
b. Install the bypass
insert into the bypass
port with the slot
facing out.
4. Use the bypass body to screw the bypass insert into
the valve. Hand tighten.
Note: If the bypass insert does not screw into the valve
assembly easily, the valve assembly may not be properly
aligned. Ensure that the valve assembly is seated fully in
the regulator housing.
9TAL 114 (L) Rev. 7 - 10093086

FIREHAWK M7 SECOND STAGE REGULATOR
Installing the Bypass and Hose Assembly
1. Install the bypass screen (P/N 10020784).
Note: Be careful not to
damage the screen. Make
sure that the screen lays
flat inside the body.
2. Apply a thin film of Christo-Lube lubricant (P/N
604070) to a new o-ring.
3. Install the new o-ring
into the first groove of
the hose swivel.
4. Apply a thin film of Christo-Lube lubricant (P/N
604070) into the second groove of the hose swivel.
. Insert the swivel into
the bypass body.
6. Slide the U-clip through
the bypass body.
Note: The U-clip should slide through the bypass body
freely.
7. Slide the bypass knob
onto the bypass body.
8. Insert the bypass body
and hose assembly
into the regulator hous-
ing so that the bypass
body tabs line up with
the slots in the bypass
insert.
9. Ensure that the hose with swivel moves freely.
10. Slide the U-clip
through the regulator
housing.
Note: The U-clip should slide through the regulator hous-
ing freely.
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TAL 114 (L) Rev. 7 - 10093086

FIREHAWK M7 SECOND STAGE REGULATOR
Installing the Diaphragm
1. Apply a thin coat of Christo-Lube to the top rim of the
regulator housing.
2. Slide the diaphragm
knob into the valve fork
slot.
3. Slide the diaphragm toward the bypass handwheel.
4. Roll the diaphragm
over the regulator-
housing rim.
Installing the CBRN Shield
P/N 10044026
1. Push the shut off buttons in for OFF position.
Note: While installing the Shield, the valve fork must be in
the UP position.
2. Apply a thin coating of Christo-Lube lubricant (P/N
604070) to the bottom of the Shield Assembly and
edge of the diaphragm.
3. Place the CBRN Shield over the diaphragm assembly.
4. Tap lightly on the top of
CBRN Shield to
remove trapped air.
. Replace spring cap.
Installing the Regulator Cover and Spring
Spring P/N 10092041
Regulator Cover, Purge P/N 10047441
Regulator Cover, Non-Purge P/N 10047664
Note: The Solid Regulator Cover does not use a spring
retainer.
1. Insert the spring into
solid cover.
a. Slide the spring onto a finger.
b. Insert spring and finger into the solid cover.
c. Attach last coil of spring to cover hooks.
2. Hold the spring in the
center of the cover.
3. Engage the last coil of the spring to each of the three
(3) molded hooks.
4. Ensure that the last coil
of the spring is
engaged to each of the
three (3) molded hooks.
. Attach spring and spring retainer (Purge models only)
by attaching last coil to retainer hooks.
6. Install the spring retainer.
11 TAL 114 (L) Rev. 7 - 10093086

FIREHAWK M7 SECOND STAGE REGULATOR
a. Pull the stem
through the retainer.
7. Double check proper engagement by lifting spring
retainer.
8. Push regulator cover, spring, and spring retainer onto
regulator housing.
9. Visually inspect the tabs. Make sure both are properly
engaged.
Double check proper engagement of both retaining
latches by visual inspection to ensure that the regula-
tor cover is securely attached to the regulator hous-
ing. Failure to follow this warning could cause the reg-
ulator to malfunction resulting in serious personal
injury or death.
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TAL 114 (L) Rev. 7 - 10093086