TM 9-2815-225-34&P 3-62.  FUEL PUMP MAIN HOUSING REPAIR (Contd) LOCATION/ITEM ACTION REMARKS d.  Assembly (Contd) 42. Barrel spring (21), barrel (20), and new O-rings (17), (18), and (19) (Contd) NOTE If barrel contains a 15 plunger lead in chamfer, do not use glide ring forming tool. i.  Assemble gasket washer (7), retainer washer (8) with rounded edge toward bellows (9) (bellows with part number toward piston), piston (10), retainer washer (8), and jamnut (12) on air fuel control piston insert (6). j.  Hold assembly by hex on air fuel Tighten nut (5) to 30-40 lb-in. control piston insert (5) and center (3.4-4.5 Nm). bellows AFC piston (10) and retainer washer (8) without twisting bellows (9).  Ensure parts are centered. k.  Wrap throttle plunger (13) threads with Teflon tape and install throttle plunger (13) into center bolt until threaded end of throttle plunger (13) is flush with center bolt surface. Install jamnut (12), but leave loose. l.  Slide throttle plunger (13) and piston bellows assembly in barrel (20).  Insert assembly very carefully to avoid damage to glide ring. m.  Cup bellows (9) between piston (10) and housing (38) to ensure bellows (9) do not wrinkle when cover is installed. n.  Line up bellows holes with Screws are to be tightened to housing and cover plate holes. 30-33 lb-in. (3.4-3.7 Nm).  Tighten Install screws and washers. after setting AFC on test stand. o.  Install lubricated O-ring (30) on AFC needle valve (29) using assembly tool (3375148). p.  Install check valve (58) on cover plate. 43. Spring (14) and AFC shim a.  Check spring as follows: (15) (1) Put 10 lb (4.54 kg) of load on spring (14). (2) Compress spring 0.300 in. Discard spring (14) if not within (7.62 mm) more than dimension of step 1. 37.5-42.4 lb (17.0-19.2 kg) of step 1. b.  Install AFC shim (15) and spring (14) on housing (38). 3-442