MSA Firehawk 10043892 Einrichtungshandbuch

Firehawk®Second

Stage Regulator

TAL 113 (L) Rev. 8 © MSA 2011 Prnt. Spec. 1000000 389 (I) Mat. 100 1134

Doc. 10000017842

MAINTENANCE AND REPAIR

3 4 811

Christo-Lube

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

••••••••

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

811

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.

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

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.

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.

TAL 113 (L) Rev. 8 - 100 1134

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