Chain saw "Ural": adjustment of carburetor, device

The chainsaw "Ural", whose carburetor adjustment will be described in the article, is the brainchild of the Perm plant. This equipment has the same quality as the legendary "Friendship". For several decades, this device has been a success with the consumer. If you also decided to become the owner of such an assembly, you should become more familiar with the structure, and also learn how to adjust the carburetor, so that the work was as efficient as possible.

Chainsaw device

Chain saw "Ural", carburettor adjustment which you can be carried out during the operation of equipment, has a two-stroke gasoline engine, whose power is 5.5 liters. from. The unit has an impressive capacity. If you compare with "Friendship", it is slightly lighter and allows you to turn the saw mechanism by 90 °.

The equipment belongs to the professional class, because the structure has a vibration damping frame and forced constant lubrication of the saw chain. The model became universal only after the manufacturer decided to equip it with a hydraulic wedge. The design is equipped with an anti-vibration system, which has a shock-absorbing suspension that separates the frame from the engine.

For reference

The air filter grid is made with a large cell, the dimensions of which are tenths of a millimeter. If you compare with imported analogues, then the mentioned parameter is a fraction of a millimeter, this reduces the efficiency and increases the proportions of oil and gasoline to 1 to 50.

More about the device

Engine parts are not adjusted as carefully as imported models. This indicates that there will be no special problems when garbage gets inside. Chainsaw "Ural", carburettor adjustment which can be done by the home master independently, is supplied complete with instructions, it is quite bulky. However, the available information does not exclude engine wedging, periodic failure of the reducer, breakage of the connecting rod, as well as increased fuel consumption.

There is no chain brake in the design. This feature can be called a trifle, but only until the problem touches you personally. The "Ural" technique, however, has one important advantage, which is expressed in sawing along the fibers.

Carburetor adjustment features

In order to avoid problems with operation, it is necessary to adjust the carburettor. Different modes provide for the use of certain proportions of the fuel mixture. The task of the consumer is to find the factory settings. The tool must be operated without changing the set parameters within a few hours.

At the next stage, the saw can be started and operated with it at minimum speed. Use the adjusting screw and the screwdriver to set the desired position. The engine should gain momentum gradually. In this case, the chain on the bus must be stationary. At higher speeds, you can go to the next stage. If smoke has appeared from the engine, the screw must be screwed. The smoke will go away, because the mixture will become poorer.

Adjustment of the carburetor chainsaw "Ural" should be carried out in such a way that the increase in speed with a sharp throttle pressed quickly, but fairly smoothly. It is important to exclude jerks. Unscrewing the screw will enrich the mixture, while depletion will occur when it is twisted. This will adjust the carburettor.

The device chainsaw brand BP-45-3,0

The chainsaw "Ural BP-45-3,0", the carburettor adjustment of which was described above, has two piston rings, an adjustable oil pump and automatic lubrication of the chain. The design provides for the presence of an engine, the volume of which is 45 cm ³ .

The length of the tire is 45 cm. The chain pitch is 0.325 inches. In the fuel and oil tanks are accommodated 550 and 260 ml respectively. The device assumes the presence of a primer. The manufacturer supplied the equipment with chrome cylinder walls. The leading star is collapsible.

Adjusting the chainsaw "Ural 2T"

Adjustment of the carburetor chainsaw "Ural-2T-Electron" is as follows. The amount of mixture supplied to the carburetor can be changed with screw No. 3. This will limit the rotation of the throttle control lever. The quality of the mixture can be changed by screw No. 1, which is located on the carburetor.

Adjustment of the carburetor chainsaw "Ural-2T" can also assume an adjustment of idle speed. The engine must work evenly and stably at idle, while the saw chain must remain in place. It is important to ensure that the engine does not release a large amount of smoke. It must have a good pick-up. This suggests that the motor should develop speed quickly and easily when the control lever is pushed sharply.

The idling speed can be adjusted by starting and warming up the engine at low and medium revs. The minimum stable revolutions are set by screw No. 3. In this case, the chain must not move along the bus. If the engine smokes excessively, this indicates a rich mixture. In this case, turn screw No. 1 until the revolutions increase, and the smoke does not decrease.

Turnovers at the next stage should be set at a minimum level. To do this, remove screw No. 3. Adjustment of the carburetor chainsaw "Ural 2 Electron" is carried out on the same principle. The next step is to check the acceleration of the engine. To do this, push the throttle control lever all the way to the stop. The engine should gain momentum. If there is a power failure, screw No. 1 is turned out to the required value. In this case, the revolutions will decrease. In order to increase the speed, the screw must be partially wrapped and check the engine for acceleration. Adjustment of the carburetor chainsaw "Ural Electron" in the next stage involves fixing the screw nuts with locknuts.

Recommendations for operating the chainsaw in winter

Preparing the instrument for operation in winter, when the ambient temperature drops below -10 ° C, it is necessary to turn on the carburettor heating system. For this purpose, the aluminum flap is removed. It is necessary to remove the cover, the carburettor and the casing.

The condition of the crankcase rubber seals should be checked if the chainsaw is to be operated at a temperature between -25 and -40 ° C. If the seals have lost elasticity or worn out, they must be replaced. A mixture of gasoline and oil should be used to lubricate the saw unit.

Conclusion

In order to work with the chainsaw was the most effective, before running it is necessary to run the tool. This also applies to changes in operating conditions. To ensure a stable idle speed of the crankshaft, it is necessary to adjust the engine. It should have a good acceleration, and the work of the unit itself must be productive.

The operator should also know how the idling speed is adjusted. This can be done by changing the quantity and quality of the combustible mixture that enters the engine cylinder. The number can be changed with screw number 3, it limits the rotation of the control lever. The consumer should know about this in order to ensure the normal operation of the device.