Двигатель УМЗ-421 имеет богатую историю.There are several modifications of this device. They are actively installed on UAZ series cars. Amplifiers in them are used vacuum type. If you believe the experts, the devices are high pitch. At the same time tensioners are able to withstand heavy loads. To understand the engine in detail, it is recommended to consider its performance.
Model 421 (engine) featuresthe following: four cylinders, ring diameter 100 mm. Compression ratio is at 8.2. At a frequency of 4000 revolutions, the device produces a power of 82.4 kW. Maximum torque is 221 ks per meter. The maximum frequency of revolutions reaches 2500 per minute. Specific fuel consumption depends on the type of modification.
Model 421 (engine) includes a blockcylinder, carburetor, and pump. Additionally used damping device. The drive is matched with a fan. At the bottom of the modification there is a fitting. Additionally, it is worth noting that the model has a check valve. The motor shaft is used with a diameter of 2.4 cm. The connecting port is connected to the hose. The fixing unit is located at the top of the device. Under the carburetor is a filter. The tensioner in the modification is applied with a tank.
Oil filler on model 421 (engine)installed in the side of the device. Its recirculation valve is designed for high pressure. Exhaust gases escape through the hole. A lining is used to avoid block wear. The lower pulley in the device is protected from gases. A hose is available for draining used oil. The filter in this case is missing.
The engine compartment at the engine is located undercentral drive. It has two shafts that are connected via a disk. The valve in the device is applied low pressure. The outlet tube is under the carburetor. For the partition used stand. If we consider the engine UAZ-421, then it has a crankcase with a hose. In total, the mechanism has three filters.
Fixing the tank is carried out using clamps.If we consider the lower part of the modification, there are small holes. The upper pulley in the device is fixed under the clamp. At the front of the engine lining installed. If you look at the top of the device, there is an air filter. Under it is a block for the connector. A 421 engine pulley ("Gazelle") is installed under the tank. It should also be noted that the model has supply hoses that are necessary for cooling the system.
The starter on the engine UMZ-421 is installed withlocking mechanism. In total he has three blocks. Experts say that the model is capable of operating at low revs. A contactor is used to close the circuit. Three conductors are supplied to the device starter.
The radiator of the model is associated with the starter.The connector on the model 421 (engine) is placed under the unit. The pulley is applied in this case by 3 mm. From the expander leaves one hose. If we consider the upper part, then it is necessary to mention the presence of wire channels for the removal of gases. There are also special clamps that are mounted on the nuts. In order to disconnect them, keys are used. In this case, the shaft must be well fixed. After the pump is disconnected, it will be possible to inspect the starter.
Указанная модификация 421 (двигатель) characteristics have the following: the maximum torque of 221 ks per meter, the average frequency of revolutions reaches 2500 per minute. The model is made with an elongated pin. She has a carburetor with a drive. Directly valve is used with a tensioner.
Also note that the device is highlighted.wide output. Considering the engine UAZ-421, you can see that his tensioner is used with a tube. Channels are made with overlays. Special attention in the modification deserves a modified starter. The filter is located in front of the damper. If we talk about the shortcomings, it should be noted that the carburetor hoses often fly out. Additionally, problems with the connector may be found. In this case, it is fixed under the drive. The fan of the model is able to operate at high speeds for a long time.
Presented modification 421 (engine)done with a vent sump. The drive is applied on two outputs. If we talk about the benefits of modification, it is important to note that it can withstand high overload. The oil pump is of high quality, and the drain tube is rarely polluted. Also, experts point to good conduction channels. Nagar on them is very rarely observed. The carburetor is standardly used with the stand. It is also worth saying that the connector is installed at the bottom of the engine.
Представленный двигатель 421 (инжектор) делается with strong seals. Cylinders in this case are on the sides. If we consider the advantages of the model, then long channels deserve attention. The oil block in the device is well protected. Experts point to a wide neck modification. The radiator is used with optional racks. The air filter is fixed near the rack. In total, the model has three sheaves.
It should also be noted that the fan is capablemaintain high momentum. The pump is used with a connector. The tensioner is installed in the bottom of the engine near the lever. The drive is fixed on the nut. In order to make a repair device, you have to first remove the radiator. After that, it remains only to fix the upper pulley and turn the bolt clockwise. The extender is removed from the engine with a key. Overlay on the cover matched a small thickness.
The starter at this modification fails,usually due to disconnection of contacts. In order to check them, the connector block is removed using a key. The next step is to inspect the surface of the tank. If oil leaks are visible on it, it is necessary to detect a broken hose. Also, the problem may lie in the shift of the tank. In this case, the pipe closes.
The carriage is inspected last.To disconnect the starter, you need to prepare a Phillips screwdriver. The fitting in this case does not need to touch. To unscrew the hoses, you can use a screwdriver. The first starter fastener is located near the expander. It is forbidden to touch the hoses in this case. After removing the bolts will only remove the starter. This can be done independently without the help of others. To check the operation of the contactor, unscrew the protective cover. If the clamping plates are not tight to the wires, they must be pressed. You can do this manually.
Replacing the pad on the connector is quite simple.If a leakage occurs, first flush the engine. After that, it is important to make sure that the problem lies in the connector. Next, to make the repair of the engine 421, you must proceed directly to inspect the parts. For this it is necessary to twist the upper pulley. The next step is looking at the device tank. The cover of the model is removed using the key.
Screws on the engine are on the sides.It should be noted that the cover must be lifted very carefully. The lining should not fall through to the filter. Also it should be noted that it is necessary to hold the tank. Cover should be clean and supple. If darkening is visible, then it will have to be replaced. After the operation, the cover is put in its place. Fasteners wound gradually. In this case, you need to continuously monitor the position of the lining. If it is tightened incorrectly, then the cover must be removed again.
