UAZ transfer case ("loaf"): a device principle of operation and reviews

Almost all SUVs Ulyanovsk production is equipped with a transfer box. UAZ ("loaf") is no exception. Despite the unsightly view, this car is capable of much. This is a favorite machine hunters, fishermen, tourists. UAZ transfer case ("loaf"), which we will discuss in this article in order to distribute torque to all axles and drive units. In today's article we will talk about it.

Device transfer case UAZ-452

Gear box of UAZ-452 is composed of drive shafts, axles, intermediate, and five gears. All these nodes are located in the crankcase, made of cast iron. Connector it is perpendicular to the axes of the shafts. The bulk of the parts is connected to the crankcase cover. During Assembly/disassembly of the box they are clearly visible. They are easy to remove or install.

The Kinematic diagram of this node is such that the gear involved in the work only when connected to front drive axle. If you enable only the bridge, all the torque, remove the drive shaft from the transmission, will be transmitted to the rear drive shaft. As the drive shaft is used, the end of the output gear transmission.

Drive shaft rear axle

What is the UAZ transfer case, what are the characteristics? This shaft is mounted on two ball bearings. To protect the element from axial movement, it holds the rear bearing with the thrust ring and the cover. On the front of the shaft is fixed gear. The inner crown has slots. The function of this gear – drive the front axle. Internal slots are required to enable direct transmission in the transfer case.

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On the splines between the bearing also includes a gear screw type. She serves as a drive for the speedometer. The rear portion of the shaft with the nut with a conical projection through the flange connected to the propeller. If you tighten this nut, its conical projection bent into one of the slots that are cut into the thread and stalled.

Intermediate shaft

This element is also held in the box by two bearings. As the front roller is applied. He is of the radial type. Cage, which contains rollers, is pressed into the housing. It is hidden by a plug. The inner race is mounted directly on the shaft. The second bearing (rear) is held on the intermediate shaft by a nut. Element is provided with a thrust ring which serves for fixing it and also for holding the shaft in the housing. The outer part of the bearing is equipped with a cover. The intermediate shaft is a single piece with the gear downshift. Also, it has slots for mounting gear. It allows you to turn on the rear drive axle.

UAZ transfer case ("loaf") device - drive shaft front axle

This transmission is equipped with the shaft. It is installed in the mechanism on two pillars. The latter are the bearings ball type. To lock the shaft in the direction of the axis, mounted on it the rear bearing. Installed it the same way as that of the intermediate shaft.

The Front pillar in the body of the box is not fixed. The element is clamped on the shaft by the propeller shaft flange. Actuator front axle is a piece together with gear. The front end has slots. With them, the shaft connects to the flange on the propeller shaft.

Gear

What other elements is transfer case? UAZ ("loaf"), device transfer case which is described in the article, is equipped with gears with straight tooth. Presenter has the ability to move on the splines on the secondary shaft of the transaxle. On this gear there are two crown. One is the splines with involute type. These are used to connect direct transfer through the inner drive shaft rear crown axle. When the driver engages a low gear, this gear will mesh with the one that is on the intermediate shaft.

What else is special about this transfer case? UAZ device transfer case which we are now considering, supplied with a pinion to enable the front axle of the vehicle. She planted so that can move on the splines located on the intermediate shaft. When the front axle is disconnected, the gear with the shaft disconnected. However, she is engaged with the drive shaft of the rear axle. This feature greatly facilitates the switching of the gears and contributes to better lubrication. When the intermediate shaft rotates, the gear splashes oil on all nodes.

Carter UAZ transfer case

Carter and his cover connected with the box by studs and nuts. Openings for connections are located around the perimeter. The accuracy and compatibility of their secured by two pins of a tube type. Process the case and the cover together. These parts cannot be switched out for others with other carters. The front part has an accurately machined surface and the flange for mounting the transfer case on the transmission.

On the crankcase has a top opening. It by pressing set resistant glass. The latter rests on the outer part of the double-row bearing angular contact type which is mounted on a drive shaft. Intop of the case has a hatch. He closes the lid.

The Hatch is designed for installation of the PTO. On the sloping surface of the casing top has an opening to install the control levers and rods of the control system transfer box. Hatch for filling and draining the lubricant can be closed by means of threaded tubes of conical type.

Device shift mechanism

So, we have considered how the UAZ transfer case. Device transfer case does not differ from boxes on other cars. Now consider what constitutes the switching mechanism.

Thus, the switching system consists of several main components. It is the shift fork rods which are fixed to the crankcase cover using the retaining plate. Also, the device has a plug to enable the front axle and the transmission, which can move the stocks. In the bodies of the plugs have sockets. Here are installed the springs and balls clamps.

In the process of movement along the stem, each of the forks is fixed on a special holder. On the lower parts there is a special foot that are fixed in the grooves of the gears. On the upper part there are rectangular recesses. With their help, the plug is connected with the levers for gear selection. What else is special transfer case? UAZ ("loaf"), a transmission device which we are considering, are made so that the shift levers were placed in separate covers. The details are on the sloping hatch of the crankcase and are attached to the stock with pins.

The Front ends of the rod are equipped with fingers, with which they are connected to rods. At the front of the cover the holes for the rods have seals. In the back they are closed with plugs of spherical shape. Between the rods is a small ball. It performs the function of the castle. The mechanism does not allow the driver to engage the lower gear until then, until it is connected to the front axle. Thus made UAZ transfer case ("loaf"). The device is not complicated. The mechanism is quite reliable and repairable, according to reviews from owners.

Control razdatkoy

Control the operation of the power takeoff with the help of levers. These levers in the cockpit are to the right of the driver. Only two of them. The top is used to enable and disable the front axle. This lever works only in two positions. Includes the top bridge and the bottom switches off.

The Bottom is necessary in order to change gears. It can be installed in three different positions – the driver selects the direct transmission, neutral (middle position) and the downshift. Here's how to turn transfer case. UAZ ("loaf"), device box which we reviewed, has another feature. It should be noted that the front axle is only for the operation of the vehicle in difficult conditions. This can be dirt, sand, snow and any other situation.

Problems with the operation

The novice drivers can be difficulties with the vehicle UAZ ("loaf"). Problems when you turn on the front axle are connected with the fact that many just don't know how really works this mechanism. At the time of overcoming the difficult areas have to be included the wheel hubs. After rotating them into position, all-wheel drive front axle will be connected only after will make the wheel 1.5 turns without slipping.

Service and repair

That is a UAZ transfer case ("loaf"). Device, repairs are easy, and the service is unpretentious, as evidenced by the feedback of owners. It is recommended to regularly check the oil level and inspect each mount. It is also necessary to lubricate the axis of the levers and adjust front pull. No more settings this box has.

Very popular among fans of off-road equipment transfer case of the UAZ-452. Reviews about it only positive. Repair and maintenance is easy and spare parts can be purchased now.