SECTION XIV. PREVENTIVE MAINTENANCE SERVICES General 50 49 Before-operation service of tank group 51 50 Before-operation service of gun group 52 50 Service when filling and charging 53 52 Service when firing 54 53 Service after firing 55 53 Service after six firing missions 56 54 SECTION XV. TROUBLE SHOOTING Precautions 57 55 Fuel leaks 58 55 Safety head “blows” (breaks) 59 56 Carrier uncomfortable 60 56 Short range 61 56 Fuel-valve failure 62 57 Failure of ignition cylinder to ignite 63 57 Failure of fuel to ignite 64 58 SECTION XVI. TANK GROUP General 65 58 Pressure tank and valve assembly 66 59 Pressure regulator 67 63 Fuel-tank assembly 68 65 Filling and safety-head plug assemblies 69 67 Tank coupling 70 69 Carrier 71 71 SECTION XVII. GUN GROUP General 72 74 Fuel-hose assembly 73 74 Valve grip 74 75 Barrel and valve-body assembly 75 77 Ignition head 76 82 APPENDIX SECTION XVIII. SHIPMENT AND STORAGE Shipment and storage 77 86 SECTION XIX. LIST OF REFERENCES References 78 87 INDEX [Illustration: Fig 1. Portable flame thrower M2-2.] PART ONE INTRODUCTION Section I GENERAL 1. SCOPE. _a. Arrangement._ This manual is published to guide and inform personnel using and maintaining flame thrower, portable, M2-2. Part One contains general information; Part Two is a guide to operation; Part Three gives maintenance procedures. The Appendix discusses shipment and storage procedures, and applicable publications. _b. References._ References are listed in the Appendix. The list includes field manuals, technical manuals, and Army Regulations. 2. RECORDS.