MSA 10033170 User manual

SECOND STAGE REGULATOR
TAL 7012 (L) Rev. 1 © MSA 2007 Prnt. Spec. 10000005389 (I) Mat. 10064393
Doc. 10064393

2
TAL 7012 (L) Rev. 1 - 10064393
Firehawk Second Stage Regulator Assembly
Second Stage w/Hose Ass'y Push-To-Connect
10033170 24" Front
10033171 42" Rear
10033172 Snap-Tite 42"
10033173 Snap-Tite 24"
Second Stage w/Hose Ass'y Slide
10033116 24" Front
10033117 42" Rear
10033118 Snap-Tite 42"
10033119 Snap-Tite 24"
Item Part No. Description
1 697453 O-RING, FLUORSILICONE
2 634669 O-RING, SILICONE
3 10018540 DIAPHRAGM ASSEMBLY
4 10018547 UCLIP, (2 REQ'D)
5 10018622 RETAINER, SPRING (NOT USED WITH SOLID COVER)
6 10018774 KNOB, BYPASS
7 10018965 SPRING, QC, (2 REQ'D)
8 10018966 BODY, BYPASS
9 10018971 BYPASS INSERT ASSEMBLY
HOSE ASSEMBLY SECOND STAGE
10033174 FRONT 24" SNAP-TITE
10033175 REAR 42" SNAP-TITE
10033177 FRONT 24"
10033176 REAR 42"
11 10020784 SCREEN, BYPASS
12 10020931 SPRING, PD
13 10023509 O-RING, VITON (2 REQ'D)
14 10023580 O-RING, SILICONE (2 REQ'D)
15 10024111 QC BUTTON ASSEMBLY
16 10024112 SLIDEBUTTON ASSEMBLY
17 10077092 VALVE ASSEMBLY W/SHUTOFF
18 10026003 HOUSING, REGULATOR
19 10026139 COVER ASSEMBLY
19a 10047406 SOLID COVER
20 10031192 O-RING, SILICONE
604070 CHRISTO-LUBE LUBRICANT
10
14
13
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube

TAL 7012 (L) Rev. 1 - 10064393
3
Firehawk Mask Mounted Regulator
part number 1003 656 Push-To-Connect
12
18 18a
5
16 46811
3
15
13
14
7
1
9
24
7
19
17
10
15
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Christo-Lube
Item P/N Description
169 453 O-Ring, F uorsi icone
2634669 O-Ring, Si icone
310018540 Diaphragm Assemb y
41001854 Uc ip, (2 Req’d)
510018622 Retainer, Spring (not used with so id cover)
610018 4 Knob, Bypass
710018965 Spring, QC, (2 Req’d)
810018966 Body, Bypass
9100189 1 Bypass Insert Assemb y
10 10020 82 Hose Ass’y, 2nd Stg., Threaded
11 10020 84 Screen, Bypass
12 10020931 Spring, PD
13 10023509 O-Ring, Viton (2 Req’d)
14 1003 951 O-Ring (2 Req’d)
15 10024111 QC Button Assemb y
16 100 092 Va ve Assemb y w/Shutoff
17 10026003 Housing, Regu ator
18 10026139 Cover Assemb y
18a 10047406 So id Cover
19 10031192 O-Ring
604070 Christo-Lube Lubricant

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TAL 7012 (L) Rev. 1 - 10064393

SECOND STAGE REGULATOR DISASSEMBLY
All repair procedures assume that the regulator is disas-
sembled rom the apparatus and acepiece. To do this:
• Be sure the cylinder valve is completely closed.
• Disconnect the regulator rom the acepiece.
• Be sure nothing is blocking the regulator outlet. Crack
the bypass valve to release any trapped air.
• I desired, disconnect the intermediate-pressure hose
rom the irst stage regulator at the hose itting using a
11/16" open-end wrench. Re er to the INTRODUC-
TION Tab o this Binder or General Notes and
required tools.
Not : Re er to the appropriate illustrated parts lists or the
apparatus being repaired.
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 irmly on the regu-
lator cover to remove
the cover, spring, and
spring retainer rom 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. Li t up on the spring
retainer to remove it
rom the regulator
cover.
REMOVING THE SPRING FROM THE SPRING
RETAINER
1. Twist the spring clockwise to remove it rom the spring
retainer.
Not : Do not stretch the spring.
REMOVING THE DIAPHRAGM
1. Roll the diaphragm edges out o the regulator housing
groove.
2. Slide the diaphragm away rom the red bypass hand-
wheel and slide the diaphragm o the valve ork.
DISASSEMBLING THE REGULATOR HOUSING O-RING
1. Remove the O-ring rom regulator housing outlet. Be
care ul not to scratch the O-ring groove.
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, lat-blade
screwdriver to remove
the U-clip rom the reg-
ulator housing.
3. Remove the bypass and hose assembly rom the reg-
ulator housing.
5TAL 7012 (L) Rev. 1 - 10064393

SECOND STAGE REGULATOR DISASSEMBLY
4. Remove the red bypass
handwheel. Slide the
handwheel back o the
bypass body to reveal
the U-clip in the bypass
body.
5. Using a screwdriver,
remove the U clip rom
the bypass body.
6. Remove the hose
assembly by pulling the
hose out o the bypass
body.
7. Remove the hose
assembly O-ring. Be
care ul not to scratch
the O-ring groove.
8. Inspect the second groove o the hose swivel. I dirty,
all dirt and oreign matter must be removed be ore
reassembling the bypass body.
9. Inspect the screen
inside the bypass body.
I dirty, all dirt and or-
eign matter must be
removed be ore reusing
the screen. I the
screen is damaged,
replace it. as ollows:
a. Insert a small screwdriver into the small hole side o
the bypass body and push the screen out the large
hole side o the bypass body.
INSPECTION OF THE VALVE FORK FOR PROPER
HEIGHT
1. Press the top o the
valve ork to check
movement.
2. Use the Height Gauge to veri y the ork height setting.
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TAL 7012 (L) Rev. 1 - 10064393
Adjustment Wheel
Fork
Valve Locking Tab
Valve Housing
Valve
Support

SECOND STAGE REGULATOR REASSEMBLY
Not : There are two di erent valve assemblies used in
Firehawk regualtors. The correct gauge must be used or
the valve assembly part number being inspected. Use the
picture below to identi y the correct gauge or the valve
part number being inspected.
3. Center the Gauge between the center gap o the valve
ork. The valve assembly must be held vertical and the
ork must be not be prevented rom moving reely.
4. The top o the valve ork must be within the accept-
able range o the gauge. I the top o the valve ork is
above the top edge o the acceptable range or i the
top o the valve ork is below the bottom edge o the
acceptable range the valve must be adjusted. Re er to
the next section or the proper adjustment procedures.
ADJUSTING VALVE FORK HEIGHT FOR PROPER
PERFORMANCE
Normally the valve ork will not require adjustment and the
valve should not be adjusted as long as it is within the
acceptable range. I the valve ork is above or below the
acceptable range, the valve must be adjusted to correct
height o the ork. Depresssurize and remove the valve
assembly rom the regulator housing. Follow one o the
ollowing procedures to correct the height o the ork.
Nominal height - Top o
ork level with center o
acceptable range.
Maximum Height - Top o
ork level with top edge o
acceptable range.
Minimum Height - Top o
ork level with bottom edge
o acceptable range.
7TAL 7012 (L) Rev. 1 - 10064393
Valve Assembly
PN 10087295
If your valve assembly looks like this:
Use this height gauge
Valve Assembly
PN 10030664
If your valve assembly looks like this
Use this height gauge
Height Gauge
PN 10090457
Height Gauge
PN 10050146
Acceptable
range

SECOND STAGE REGULATOR REASSEMBLY
ADJUSTMENT FOR VALVE FORK ABOVE THE
MAXIMUM RANGE
Above maximum height –
Top o ork above top o
acceptable range.
1. Slide the adjustment when and valve housing slightly
away rom the valve support. This will ree the adjust-
ment wheel and allow it to rotate. The adjustment
wheel cannot be turned unless the ribs on the wheel
are ree rom engaging the locking tab.
2. Turn the adjustment wheel clockwise to lower the ork.
3. Slide the cylindrical valve housing back into place
making sure that the valve lever and ork are not bind-
ing. The ork should move easily up and down when
pushed.
ADJUSTMENT FOR VALVE FORK IF BELOW THE
MINIMUM RANGE
Below minimum height –
Top o ork is below
acceptable range.
1. Slide the cylindrical valve housing slightly away rom
the valve support. This will ree the adjustment wheel
and allow it to rotate. The adjustment wheel cannot be
turned unless the ribs on the wheel are ree rom
engaging the locking tab.
2. Turn the adjustment wheel counterclockwise to raise
the ork.
3. Slide the cylindrical valve housing back into place
making sure that the valve lever and ork are not bind-
ing. The ork should be moved 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 rom 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.
5. Turn the valve counter-clockwise to unthread the
bypass insert rom the valve.
6. Turn the regulator
housing until the
bypass insert drops out
o the regulator hous-
ing.
7. To remove the valve,
turn the regulator hous-
ing upside down, or li t
the valve out o the
regulator housing.
8. Replace all O-rings on the bypass insert and bypass
body.
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TAL 7012 (L) Rev. 1 - 10064393

SECOND STAGE REGULATOR REASSEMBLY
DISASSEMBLING THE REGULATOR HOUSING QC
BUTTON AND SLIDE BUTTON
1. Remove the old O-
rings. Be care ul not to
damage the O-ring seal
area.
2. Pull on the buttons to remove them rom the regulator
housing. Be care ul not to lose the spring.
REASSEMBLING THE DIAPHRAGM
1. Slide the diaphragm
knob into the valve ork
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 o spring retainer.
Not : Do not stretch the spring
R moving Diaphragm Ass mbly
1. Roll diaphragm edges out o regulator housing groove.
2. Slide diaphragm away rom red bypass handwheel
and slide the diaphragm o the valve ork.
INSTALLATION
Installing Spring into th N w Solid R gulator Cov r
Not : New Solid Regulator Cover does not use a spring
retainer.
1. Insert old spring into
solid cover
a. Sliding spring over inger, insert spring and inger
into the inside o solid cover.
2. Attach last coil o spring over the cover’s hooks
a. Holding the spring
centered in the solid
cover with inger,
insert thumb o other
hand down along the
inside o cover to the
bottom o spring.
b. Slip the last coil o spring over each o the three (3)
molded hooks at the bottom o cover.
c. Ensure that the last
coil o the spring is
engaged over each
o the three (3) mold-
ed 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 may
r sult in s rious p rsonal injury or d ath.
9TAL 7012 (L) Rev. 1 - 10064393

SECOND STAGE REGULATOR REASSEMBLY
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 may 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. Li t 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 ilm o Christo-Lube lubricant to the new
O-ring.
2. Roll the new O-ring over the end o the regulator
housing outlet and seat it into the O-ring groove. I the
O-ring is not seated, it can cause an air leak.
REASSEMBLING THE BYPASS AND HOSE ASSEMBLY
1. Apply a light ilm o Christo-Lube lubricant to all O-
rings.
2. Roll a new O-ring into the irst groove o the bypass
body.
3. Insert the new screen (i removed). Insert screen into
the large hole (hose swivel) side o the bypass body.
Be care ul not to damage the screen. Make sure the
screen is lat inside the body.
4. Roll a new O-ring into
the irst groove o the
hose swivel.
5. Apply a thin ilm o Christo-Lube lubricant (P/N
604070) into the second groove o the hose swivel.
6. Insert the swivel into
the bypass body.
7. Slide the U-clip
through the bypass
body. The U-clip
should slide through
the bypass body reely.
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 reely.
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TAL 7012 (L) Rev. 1 - 10064393

SECOND STAGE REGULATOR REASSEMBLY
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 reely.
REASSEMBLING THE VALVE ASSEMBLY
1. Insert the valve into the regulator housing -- valve ork
slot acing up and away rom the bypass port.
2. Push the valve into the regulator housing.
3. Insert the bypass insert
into the bypass port --
slot acing out.
4. Use the bypass body to thread the bypass insert into
the valve. Hand-tighten only.
Not : I 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 ully seated in the regulator housing.
5. 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 retainer, spring, and regulator
cover.
9. Check the valve assembly calibration. (See Inspection
or Valve Fork section.)
10. Flow-Test the SCBA (see the TESTER section o this
Binder).
REASSEMBLING THE REGULATOR HOUSING QC
BUTTON AND SLIDE BUTTONS
1. Apply a light ilm o Christo-Lube lubricant to the new
O-rings.
2. Install new O-rings on the button’s post.
Not : With the red bypass handwheel acing you and the
cap acing up, the slide button is to the le t and the hous-
ing button is to the right.
3. Install the spring. Align the buttons.
4. Push irmly on the buttons, install the post O-ring on
the inside o the regulator housing.
5. Double-check proper engagement by pulling on the
buttons to ensure that they are securely attached to
the regulator.
11 TAL 7012 (L) Rev. 1 - 10064393