MSA FireHawk M7 - Regulator Housing and Buttons; Valve Assembly

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.
5. 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 125 ±5 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 10051109)
Installing the Valve Assembly
P/N 10087295
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.
9
TAL 114 (L) Rev. 7 - 10093086