Adjustment.

TM 3-1040-220-34&P

(4) Insert poppet seat (18) into regulator body

body (22). When adjustment nut (1) has been screwed

(22) from the end nut end and push in until seated.

in sufficiently, check that spring guide (3) is seating

Poppet seat (18) should be inserted so that the

properly in hole in adjustment nut (1).

small end goes in first.

Screw adjustment nut (1) into regulator body

(5) Insert poppet valve (13) into regulator body

(22) until tension of spring cartridge (4) is felt against nut.

(22), large end first, until it is seated against poppet seat

(19) Screw locknut (2) over adjustment nut (1)

(18).

until tight against regulator body (22).

(6) Install poppet preformed packing (15) in

(20) Install lockwire (9) in end nut (8). Secure

internal groove of seat retainer (16).

lock wire with lock wire screw (21).

(7) Install retainer screen (17) over seat retainer

Installation.

Refer to paragraph 2-3b(2) for

(16) and insert the assembly into regulator body (22) until

installation instructions.

seated against poppet seat (18).

e. Adjustment.

(8) Install retainer seat preformed packing (14) in

(1) Check that the compressed gas cylinders

installed seat retainer (16).

have been recharged in accordance with procedures

(9) Place flat washer (12) in groove between

described in TM 3-1040-220-12&P.

poppet valve (13) and seat retainer i16).

(2) Check that all valves are closed.

(10) Install flat washer (10) in end nut (8).

(3) Open the globe valve (18, fig. 2-1).

(11) Insert spring (11) in end nut (8).

(4) Observe pressure indication on the dial

(12) Screw assembled end nut (8), flat washer

indicating pressure gage (29, fig. 2-1) and dial indicating

(10), and spring (11) into regulator body (22).

pressure gage (1, fig. 2-3). The high pressure indication

Make certain that spring (11) seats properly on

should be between 2,000 and 2, 250 pounds per square

flat washer (12) installed in step (9) above.

inch. The low-pressure indication should be between 45

(13) Tighten end nut (8) with a wrench until nut is

and 55 pounds per square inch.

firmly seated. Do not overtighten.

(5) If the dial indicating pressure gage (1, fig. 2-

(14) Install coated piston (6), small end first, in

3) reading is high, loosen locknut (2, fig. 2-2) and screw

regulator body (22).

adjustment nut (1) counterclockwise into regulator body

(15) Place spring guide (5) in position in groove

(22). If the dial indicating pressure gage indication is

coated piston (6).

low, loosen lock nut (2) and turn adjustment nut (1)

(16) Slip spring cartridge (4) over spring guide

clockwise out of regulator body (22). After adjustment

(5), making certain it seats properly on spring guide

tighten locknut (2).

grooves provided for this purpose.

(17) Slip spring guide (3) over spring guide (5)

(6) Observe the dial indicating pressure gage (1,

and position so that spring cartridge (4) is properly in

fig. 2-3). The indication should be between 45 and 55

grooves.

pounds per square inch. If the gage does not indicate

(18) Place adjustment nut (1) down over

this value, readjust regulator the pressure regulator as

assembled spring cartridge (4) and spring guides (3 and

described in (5) above.

5).

Screw adjustment nut (1) into regulator

3-2