TM 5-4220-233-14
(1) Remove plug (1) from top of handknob (2).
(2) Remove snap ring (3) from top of adjusting screw assembly (4), then remove handknob (2).
(3) Clamp body (5) of regulator in a vise with a protector around body to prevent damage.
(4) Unscrew bonnet (6) from body (5) and tilt bonnet when removing to prevent internal parts from falling
out.
(5) Lightly tap on base of body (5) until sensor (7) and connector (8) are dislodged from body.
(6) Remove spring pad (9) from tip of sensor (7).
(7) Remove sensor (7) from sensor back-up (10).
(8) Remove and discard back-up ring (11) and O-ring (12) from sensor back up (10).
(9) Remove and discard back-up ring (13) and O-ring (14) fromsensor back-up (10).
(10)
Remove screw (15) from slot in bonnet (6) and pull adjusting screw assembly (4) and spring (16)
out of bonnet (6).
(11)
Slide thrust washer (17), thrust bearing (18), and thrust washer (19) off of adjusting screw assembly
(4).
(12)
Unscrew main valve assembly (20) from inside of body (5).
(13)
Rotate main valve assembly (20) with filter assembly (21) pointing upward then unscrew filter (21)
from main valve body (22).
(14)
Remove spring (23) and main valve (24) from main valve body (22).
(15)
Remove an discard back-up ring (25) and O-ring (26) from main valve body (22).
NOTE
Seat retainer (27) installed In main valve body (22) has left hand threads.
(16)
Unscrew seat retainer (27) remove and discard valve seat (28) from main valve body (22).
b.
Cleaning of Regulator Valve Components. Refer to Chapter 4,Section VII, to clean disassembled parts of
regulator and new soft goods obtained from rebuild kit and for proper lubricant to use on O-ring during re-
assembly, as required
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