(2) Foreign matter may be in barrel, or barrel may be dented. If dented, replace barrel and needle as a unit. If not dented, disassemble and clean. (Pars 74 and 75) 63. FAILURE OF IGNITION CYLINDER TO IGNITE. _Trouble_ _Remedy_ _a._ Match in cylinder Pull trigger repeatedly. If cylinder moves but incendiary does not ignite, remove cylinder charge does not ignite. (Par 30) and examine. (1) If matches have been pushed flush with inner surface of cylinder body, the cylinder is defective. Destroy. (Par 30) Replace. (2) If matches project 1/16 inch or more from cylinder, ignition head is defective. Disassemble ignition head (Par 76 _b_) and examine. Replace parts as necessary. (Par 76 _c_) _b._ Cylinder does not (1) Spring case is not free to rotate rotate to bring new charge because of dirt. Clean and lubricate. into position. (Par 49) (2) Cylinder is improperly loaded. (Par 18) (3) Ignition cylinder binds on barrel because of dirt or excessive warping of ignition cylinders from heat of firing. Remove and destroy (Par 30) ignition cylinder. Reload. (4) Spring case is defective. Replace as a unit. (Par 76 _b_, _c_) _c._ Trigger does not (1) When on a mission, use fingers return to normal position on trigger to pull back to normal (with ignition cylinder in position. place). (2) If time permits, remove trigger rod. (Par 76 _b_) Clean rod and hole in which rod slides. Lubricate. (Par 49) Reassemble. (Par 76 _c_) _d._ Lack of spring tension Trigger spring is off hook of trigger, at trigger. off spring screw, or broken. Replace where necessary. 64. FAILURE OF FUEL TO IGNITE. _Trouble_ _Remedy_ _a._ Atomizer hole clogged. Clean with fine wire. (Par 52 _i_)