TM 5-3805-258-24-2ENGINEDISASSEMBLY AND ASSEMBLYAIR GOVERNORModels 950BNSCE and 950BSCEASSEMBLE AIR GOVERNORWARNING1.2.3.4.5.6.7.8.9.10.11.12.13.Prior to assembly, lubricate the two lowerbody 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 bottomof piston (2).If piston is plastic, install spring (6) withsmall end of spring against valve (5). Installretaining ring (7) on top of the large end ofspring (6). Make sure that the concave side ofretaining ring (7) is facing away from piston(2). Press retaining ring into piston (2) withfinger pressure only. Do not use a pressoror hammer to install retaining ring.If piston is metallic, install spring (6) withthe small end of the spring against valve (5).Press the spring down until the larger coiledend 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 springis next to piston (2).Install exhaust stem (9) in piston (2) throughspring (8) into piston (2).Install lower spring seat (10), spring guide(11), spring seat (12), spring (13), and hexshaped upper spring seat (14) on adjustingscrew (15).Screw the upper spring seat (14) onto adjust-ing screw (15) until the distance from the topof the seat to the bottom of the adjustingscrew head is approximately 1-7/8 inches.Install locknut (16).Install adjusting screw and spring assemblyin the governor housing.If NBC exposure is suspected, all air filter mediashould be handled by personnel wearing pro-tective equipment. Consult your unit NBC Offi-cer or NBC NCO for appropriate handling or dis-posal instructions.14. Install snap ring (17). Make sure that snapring is completely seated in the groove inthe governor housing.15. Install O-ring (18) and cover (19).16. Install filters (20) in governor housing.5 - 2 0b
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