'MIICROFICHE REFERENCE LIBRARY - Cd3wd.com

4,Ol - 4.02If this method cannot be used, aln-ost any maans can be tried to stopa wheel from spinning. Same wggestions include w@dging the space betweenthe spinning wheel and the body with a big plank, &Axing the wheel to thechassis so it cannot turn, or jamming it with rocks under the fender. Theother wheel on that axle will then get the pcwer that was wasted on spinning,possibly moving the car. Of course, such wedging or other fastening must beremoved as soon as the car is free or the wheel will be dragged and may haltthecar.All of these expedients are made unnecessary on the Mercedes-BenzUnimog, whidh has locks for both differentials. These lock both wheels onthe axle together so that if either one gets tiaction it will mxe the U-g,and the other will not spin.4.02 hung Up in Mud or SnowThe second major threat from mud or snow is sinking peep enough in itto allow tne chassis to become hung up. This creates so nnxh drag on thecar that the tires lose traction, and the car cannot proceed.This difficulty is often mxe easily dealt with than that of pure lossof traction, since the driver can see the obstacle and either remove it or goaround it. Perhaps the most comrkx method of extricating a car fram deepsnow or mud is to dig it out, thus removing the obstacle.As outlined in section 3.05, there are sm conditions in which it isunreasonable to expect a car to operate without a plow. If snow is two feet(112 meter) or less in depth,a 4WD car with chains should be able to get mu&~.Ifthefrantendishungupinthesnowormud,trybackingout.Itmay help to add some traction under the wheels with sand, gMve1, sticks,leaves, grass, planks, or whatever else is at hand. Once off the obstacle,cut it down wi-ih shovels and try again.Rmvingpart of theloadis anotherusefulexpedient. I-tallows thefrarruz to rise on the springs, since the springs are not so heavily loaded.This increase in ground clearance may make it possible to get the car out.It should at least make it easier to free the car. The axles may riseslightly as a result of reduced load on tie tires, but will not rise asmuch as the chassis.If the car cannot be backed up, it will be necessary to lift it overthe obstacle. With a small car and a large number of people it may bepossible to lift the car enough by hand to get off the obstacle. Otherwisejack up the wheels one by one and pack the space under them with logs, sticksorplanks. This will provide a raised roadway, albeit rather crude, onwhich the car can be driven over the trouble spot.Once the car is ming again, use every nmns to keep it going.Momentum is a great aid to getting a car through deep snow or mud, andkeeping a car moving slmly is much easier than getting it started from adead stop. If the hazard is an extensive one, it may be advisable to drivewith one side of the car off the road, up on the ridge of snow or mud, ifthe ridge is packedhardenough. Once mvi.ng, sections 3.04 and 3.05 willprovide some assistance on hew to keep the car going.