_Trouble_ _Remedy_ _a._ Defective safety head. Replace with new safety head. (Par 69 _b_) _b._ Defective pressure If replacement safety head also regulator. breaks, follow test procedure in Paragraph 56 _b_ to determine whether pressure regulator needs adjustment or is defective. 60. CARRIER UNCOMFORTABLE. _Trouble_ _Remedy_ _a._ Cord becomes loose Use only hard-braided seine cord or breaks. furnished in service kit for replacements. Lace tightly as shown in Figure 46, using slip-proof knots at ends. _b._ Straps not adjusted to Adjust straps to fit each new wearer. fit wearer. Tank group must be high on back and snug on body. (Pars 19 and 71) _c._ Carrier frame Cord is too loose. Tighten cord. presses on wearer’s back. Use slip-proof knots at ends. 61. SHORT RANGE. _Trouble_ _Remedy_ _a._ Stream of burning fuel Fuel valve is not fully open because issues at an angle or in a of: very broad spray. (1) Faulty operation. Be sure to compress controls all the way when firing. (Par 26) (2) Improper adjustment or assembly of valve. To correct, see Paragraphs 74 and 75. _b._ Rapid drop of range Pressure-tank valve is not fully during a burst. open. Open all the way. If this is not effective, test pressure regulator. (Par 67 _d_) _c._ Shorter range in each Pressure tank is not fully charged. successive burst. (1) Before firing be sure tank is charged to at least 1,700 pounds per square inch. (Par 32) (2) Check for leaks to make sure pressure has not decreased since charging. (Par 53 _d_) _d._ Short range with Dried fuel or other foreign matter longer time of discharge is in fuel lines. Disassemble and than 8 to 9 seconds. clean. 62. FUEL-VALVE FAILURE. _Trouble_ _Remedy_ Valve fails to close when (1) Work the grip safety to trip controls are released. the valve lever.