printable version
Work permanent all-wheel drive (4WD) (optional)
Engine power is transmitted to the front and rear wheels. Standing drive (4WD) is particularly useful when you want good antiskid properties of the car when driving on a slippery, wet, snow cover, or when driving in the mud. However, remember that this type of car is not suitable for off-road. Vehicles with permanent all-wheel drive (4WD) generally improves traction on paved roads in wet conditions or slippery road surfaces. Random (not constant) motion in off-road conditions is also allowed. But it is always necessary to reduce the speed of the transition to off-road. In general, the antiskid properties of the car and brake system performance is significantly reduced when driving off-road. Thus, the movement on the road is always imposes a special responsibility on the driver for the safety of himself and of his passengers.
Precautions for managing four-wheel drive Always wear your seat belt. Do not drive in heavy off-road conditions, for which the car is not designed, or if the driver's qualifications do not meet these conditions. If a strong cross wind move at low speed. The vehicle has a high center of gravity, its stability is strongly dependent on the movement of the cross wind. Slow motion provides a better handling car. Check the condition of the brake system at the end of the motion on wet and slippery surfaces. Repeatedly press the brake pedal when driving at low speed, until you feel the return of the effectiveness of braking forces. Continued movement of deep water is not allowed. The braking distance of vehicles with permanent all-wheel drive (4WD) is not much different from the stopping distance front-wheel drive (2WD). When driving on roads with snow or muddy surface, ensure sufficient distance between your and the vehicle in front. Because the torque is continuously transferred to all four wheels, the effectiveness of all-wheel drive (4WD) is strongly dependent on the state of the tires. Tires of all wheels should be of the same size and type. If you need to replace at least one tire or wheel, replace all the others. Regularly check the wheels and permutation of pressure in them. A car with four-wheel drive (4WD) can not be towed by an ordinary tractor. If you want to tow, all four wheels of the car do not have to touch the ground, ie, a special tow truck. If you tow a four-wheel drive vehicle with two wheels, concerning the earth, all-wheel drive (4WD) will be damaged. In case of emergency, if the vehicle is towed with all wheels rolling on the ground, then he should only move forward swing on a rope that is attached to the tractor. During towing, be sure to: - The ignition key is in the "ACC" or ?�ON?�; - Set the gearshift lever to neutral (automatic transmission selector in position ?�N?�); - Release the parking brake.
NOTE To avoid serious damage to the vehicle all-wheel drive (4WD), do not exceed the speed of its towed more than 15 km / h over a maximum distance of 1.5 km. |
| Fig. 1.187. Check the car on a roller dynamometer: A - time without drive rollers; B - roller (check the speedometer)
|
When checking the speedometer or general inspection / maintenance-wheel drive vehicle is recommended on rollers at all four wheels, as shown in Figure 1.187.
ATTENTION In conducting such tests use the parking brake is not permitted. |
If you use the stand for front-wheel drive when checking a car with permanent four-wheel drive (4WD) strictly follow the following rules. Check the tire pressure of all wheels. Install the front wheels on the rollers of the stand, as shown. Release the parking brake.
Install the rear wheels at the time the rollers without drive, as shown in Figure 1.188. When using chains, install them on all wheels. If the front and rear wheels stuck in the mud, does not spin their engines unnecessarily. All-wheel drive (4WD) can be damaged.
ATTENTION If the car with permanent four-wheel drive (4WD) is raised on a jack, do not start the engine, it can cause the rotation of the wheels. There is a danger that the rotating wheel may touch the ground and cause a "jump" of the car. If one of the front or rear wheels begins to slip in the mud, snow, etc. the vehicle can sometimes get an additional touch of the accelerator pedal; However, avoid prolonged operation of the engine revving as it may cause damage to the wheel-drive (4WD). |
|