DISASSEMBLY AND ASSEMBLY
Models 950BNSCE and 950BSCE
ASSEMBLE AIR GOVERNOR
Prior to assembly, lubricate the two lower
body bores, all O-rings and O-ring grooves.
Install O-ring (1) in piston (2).
On plastic pistons only, install washer (3)
and retaining ring (4).
Position inlet/exhaust valve (5) into bottom
of piston (2).
If piston is plastic, install spring (6) with
small end of spring against valve (5). Install
retaining ring (7) on top of the large end of
spring (6). Make sure that the concave side of
retaining ring (7) is facing away from piston
(2). Press retaining ring into piston (2) with
finger pressure only. Do not use a pressor
or hammer to install retaining ring.
If piston is metallic, install spring (6) with
the small end of the spring against valve (5).
Press the spring down until the larger coiled
end snaps into the recess in piston (2).
Install piston O-rings on piston (2).
Install exhaust stem spring (8) in piston (2).
Make sure that the large coil end of spring
is next to piston (2).
Install exhaust stem (9) in piston (2) through
spring (8) into piston (2).
Install lower spring seat (10), spring guide
(11), spring seat (12), spring (13), and hex
shaped upper spring seat (14) on adjusting
Screw the upper spring seat (14) onto adjust-
ing screw (15) until the distance from the top
of the seat to the bottom of the adjusting
screw head is approximately 1-7/8 inches.
Install locknut (16).
Install adjusting screw and spring assembly
in the governor housing.
If NBC exposure is suspected, all air filter media
should be handled by personnel wearing pro-
tective equipment. Consult your unit NBC Offi-
cer or NBC NCO for appropriate handling or dis-
14. Install snap ring (17). Make sure that snap
ring is completely seated in the groove in
the governor housing.
15. Install O-ring (18) and cover (19).
16. Install filters (20) in governor housing.
5 - 2 0b