MSA Firehawk 10043892 Maintenance And Repair Download Page 7

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.

Note:

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 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.

7

TAL 113 (L) Rev. 8 - 10051134

Summary of Contents for Firehawk 10043892

Page 1: ...Firehawk Second Stage Regulator TAL 113 L Rev 8 MSA 2011 Prnt Spec 10000005389 I Mat 10051134 Doc 10000017842 MAINTENANCE AND REPAIR...

Page 2: ...RN 10039172 3 4 U Clip 10018547 6 Knob Bypass 10018774 7 Spring Button 10018965 8 Body Bypass 10018966 9 Insert Bypass 10018971 Hose QC 10046484 11 Screen Bypass 10020784 12 Spring Diaphragm 10092041...

Page 3: ...20931 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...

Page 4: ...es 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 Care should be taken when handling the...

Page 5: ...ose 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...

Page 6: ...mally 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 mu...

Page 7: ...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 spri...

Page 8: ...ainer 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 s...

Page 9: ...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...

Page 10: ...bypass body to thread the bypass insert into the valve Hand tighten only Note If the bypass insert does not thread into valve assembly easily the valve assembly is not aligned in the regulator housin...

Page 11: ...ing Align the buttons 4 Push firmly on the buttons Install the post o ring on the inside of the regulator housing 5 Double check proper engagement by pulling on the buttons to ensure that they are sec...

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