VEHICLE RECOVERY - Pirate4x4.Com

More documents

Recommendations

Info

FM 21-305/AFMAN 24-306vehicle. Use a skid on the rear wheels only(Figure 22-14). If necessary, change wheels fromone hub to another. Use a skid in the followingmanner:Obtain a pole 4 inches in diameter and 6 to 8feet long.Place one end of the pole above the crossmember near the transmission and the otherend on the ground.Pass the pole under the spring U-bolts, align itwith the spring and lash it securely to thespring.Move the vehicle, using front-wheel drive.Starting will be difficult, but once moving, thevehicle will ride and handle surprisingly well.Substitutes for Tire ChainRope or tow chains can be wrapped around thewheels as tire chain substitutes. Fasten themsecurely, but leave slack around the tires to preventdamage. Remember, these are only temporary substitutes.Remove them as soon as possible.Engine Failures During Field DrivingFuel or ignition troubles commonly cause enginefailures in the field. You can correct some ofthese by field expedients, but remember, theseare only field expedients, not repairs. Inform yourunit maintenance personnel as soon as possible sothat proper repairs can be made, if necessary. Afew of these field expedients are described below.22-8
FM 21-305/AFMAN 24-306(For Army Only : More field expedients areexplained in FM 20-22 and appropriate operatorvehicle -10 TM.)Shorted Distributor Cap. A cracked distributor capwill cause your engine to miss and backfire, particularlyin damp weather when the crack is filledwith moisture. To correct this, carefully clean anddry the distributor cap, scrape the crack or runner,and fill the crack with tar or other sticky material(Figure 22-15).Frozen Fuel Lines. Condensation in your fuel tankmay get into the fuel lines and freeze in cold weather.This effectively cuts off the fuel supply to your carburetor.Thaw out these spots using hot water.Never use a flame or any device that could cause aspark directly on the line.Leaking Line Fitting. Leaks at fuel line fittings candevelop from the vibrations caused by cross-countryoperation and may result in an extremely dangerouscondition if not discovered and corrected promptly.To correct this deficiency, unscrew the coupling nut,wind a piece of string clockwise behind the flare,slide the coupling nut over this temporary gasket,and tighten with a wrench (Figure 22-17).Broken Distributor Point Spring. If your engine cutsout, stops, and cannot be restarted, the cause maybe a broken distributor point spring. Take off thedistributor cap and if this is the cause, cut a pieceof rubber from a tire and double it behind thespring (Figure 22- 16). The engine will then startand operate at slow speeds. The rubber substitutecannot close the point fast enough for high-speedoperation.Fuel Pump Vapor Lock High temperatures vaporizinggasoline in the fuel line causes this failure. Thefuel pump will not pump vapor. Soak a cloth inwater and place it over the fuel pump (Figure 22-18)to cool the fuel pump and condensate the vapor.The evaporation of moisture from the cloth has arefrigerating action that is most effective in hot, dryclimates.Other. Two other common occurrences that candamage your engine are a punctured radiator and abroken fan belt.If you have a punctured radiator, cut the cooling fins.Push them back from the tubes in front of the leakytubes so you have enough room to work. Cut theleaking tube in half and fold the ends back threequartersof an inch. Close the ends by pressing themflat with pliers. This repair may hold permanently,22-9
Page 1 and 2: FM 21-305/AFMAN 24-306CHAPTER 22VEH
Page 3 and 4: FM 21-305/AFMAN 24-306Single-Vehicl
Page 5 and 6: FM 21-305/AFMAN 24-306MAN POWER REC
Page 7: FM 21-305/AFMAN 24-306To raise the

VEHICLE RECOVERY - Pirate4x4.Com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?