_c._ If a supply of flame thrower tank groups is available, they may be preferred to the packboard method of transportation. Tank groups are easy to carry, and a filled and charged tank group can replace an emptied one as quickly as packboard method can be used to service flame thrower. * * * * * =48. SERVICE KIT.= * * * * * _a. Tools._ * * * * * 1 Screw driver, common, * * * blade diameter, H22-50-6. (Fig. 8.) =2 Wrenches, hex, 5/32 inch across flats (for 5/16-inch socket-head set screws), H22-49-140. (See B, fig. 8.)= 2 Wrenches, hex, * * * set screws), H22-49-91. * * * * * _b. Accessories and spare parts._ * * * * * 1 Tank and valve, pressure, assembly =(less valve shaft assembly, B81-1-883) B81-1-879. (See fig. 35.2.)= 1 Shaft, valve, assembly =B-81-1-883. (See fig. 35.2.)= 2 Case, spring, assemblies B81-1-444. (Fig. 9.) * * * * * 1 Regulator, pressure, assembly =(Grove type) B81-1-778. (Fig. 35.2.)= 1 Compound, anti-seize, white * * * 1/4-pound can, H99-3-12. 2 Gages, pressure * * * assembly B81-6-90. (Fig. 32.) =6 Tubes, deflector, A81-1-501. (See fig. 39.)= =6 Locknuts, pipe, hex, 1/8-inch, H98-5-382. (See fig. 39.)= =2 Supports, diaphragm, A81-1-428. (See fig. 47.)= =6 Springs, R81-1-922 (for socket). (See fig. 35.8.)= =6 Washers, backing, R81-1-924 (brass washer for socket). (See fig. 35.8.)= =12 Washers, B81-1-923 (synthetic rubber washer for socket). (See fig. 35.8.)= =6 Caps, plug, B81-1-926 (with chain) (dust cap for plug). (See fig. 35.3.)= =12 Nuts, wing, A81-1-877. (See fig. 35.4.)= =2 Army Service Forces Catalogs CW 6-445115, Sets of Tools, Equipment, and Similar Material: Kit, service, for Portable Flame Thrower, M2-2.= =2 Army Service Forces Catalogs CW 7-440114, Organizational Spare Parts and Equipment: 1st and 2d Echelons: for Flame Thrower, Portable, M2-2.= =2 War Department Technical Manuals 3-376A, Portable Flame Thrower M2-2.= =49. LUBRICATION.= _a. Gun group._ * * * * * (2) _Frequency of lubrication._ The surfaces of * * * lubricated before reassembly. =Do not soak or wash the spring case assembly in solvent because this may remove the grease which is factory packed in the spring case assembly. This grease cannot be replaced. To clean spring case assembly, wide outside surfaces with cloth saturated with solvent.= * * * * * =53. SERVICE WHEN FILLING AND CHARGING.= * * * * *