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Most. an important pointwhich is the adjustment of the valves of the Dnieper motorcycle and others, is faithful installation of gaps. If you moved a bit and the clearance turned out to be great, then the clatter will be observed at the heads, if de the contrary, the gap was too small, then the rods can begin to begin. Setting up the valves on the motorcycle Ural and Dnipro should be made after each manipulation of the assembly of cylinders and heads that must be securely secured and tightened.
Many are wondering - how to set up a valve on the Ural motorcycle?
Answer is unlikely perhaps possible, because there are no less pairs of ways how to adjust the valve on the Dnipro motorcycle. The second of them is longer, but more reliable. That is why when I need to adjust the valves, I will precisely use this method. So, let's begin.
How to adjust the valve on the Ural and Dnipro motorcycle?
Ural valve adjustment. Method number 2:
- We unscrew the cover from the cylinder, without forgetting to get rid of oil residues.
- We turn the crankshaft and pay attention to the valve.
When closing the inlet valve, the gap is adjusted for exhaust valve (The valve is open and starts to close).
When opening the exhaust valve, the gap is adjusted for the inlet valve (the valve is closed and starts to open).
It is worth noting that the diameter of the gap should be 0.05mm. If this value is different, we produce adjust the bolt on the rocker with the leaflets. By installing the desired gap diameter, you can delay the locknut back.
So, we figured out how to customize the valve, describing both methods. It is worth noting that at least once a month check these gaps to support normal work Engine.
Adjusting the valves on the motorcycle Ural or Dnipro is infrequently carried out, but this procedure is required and allows you to save the motor in a full-fledged working condition. Despite the fact that the Soviet heavy motorcycles presented have different engines, the principle and the adjustment scheme coincides.
What is thermal valve gap?
The thermal valve gap is the distance from the top end of the valve rod to the gulling part of the rocker. This gap is needed that when the motor exit to high operating temperatures, followed by the expansion of the metal, the optimal function of opening valves is preserved. Of course, on the cold, the motor can work uneven or not in full power, benefit motors with air cooled Quickly go to the operating temperature and the valve begin to work as it should be. In different aggregates - a different gap, this is due to the materials from which they are made. For example, in the motorcycle Dnipro K-750 has a 0.1 mm clearance, while more modern models of Soviet heavy motorcycles received a gap of only 0.05 mm. This means that the older K-750 has been made of metal susceptible to high degree of thermal expansion, and modern models are made of more stable metal. Special probe is used to control gaps. They are made of steel plates of different thickness. On each probe, its thickness is indicated, and the degree of deviation with the specified value is so small that in the conditions of operation of these engines, the error can be neglected.
Why is the valve adjustment on the Ural motorcycles?
Valves have mobility in both directions, along its axis, which means the gap can increase or decrease. To begin with, consider what will happen if the gap decreases, up to the adjustment to the pusher. First of all, the power is reduced, due to the loss of compression. The engine heated, the metal expanded, and the valve began to close not completely, lay down to the saddle, due to a constant contact with the pusher. It is possible to determine this in several features - the engine began to start worse, the loss of power is noticeable when warming up, you can also hear the knock of the valves on the hot and notice the cotton in the carburetor. Here you can find out in detail about. On the other hand, if the clearance becomes more laid, then the opening of the valves will not be completely, the combustion chamber will become less filling the fuel and air mixture and worse exhaust gases. In both cases, the engine will work markedly worse, and in the most running cases the motor will simply be impossible to start. By the way, it must also be adjusted.
Adjustment of valves
As you know, the motorcycle engines of the Urals and Dnipro are different, but have their own characteristics, thanks to which their settings can be divided into three groups. But before proceeding with work, you must prepare workplace and motor. First of all, the engine must be cooled, you should also prepare a set of probe, multiple keys and butter collection containers.
Valve adjustment - M-72, Dnipro K-750, MB-750, Dnipro-12.
Sequence Consider on the basis of the scheme of the gas distribution mechanism: we spin the screw (9) located from the end side and remove the cover (10), without forgetting the gasket (8). · We turn the motor kick starter, until the inlet valve is closed. We measure the dipstream clearance, for these models it is 0.1 mm. In the case of deviations, go on if the gap within the tolerance is collecting the node back. · The lock nut (5) weakens and, scrolling the adjusting bolt (11) we install the required clearance, using the diploma to check. The diploma should be included in the gap with a little effort. · After installing the gap of the counterpart fix it, while holding the adjusting bolt. Finishing gap adjustment. · We install the cover back, not forgetting about the gasket, and attract it with a screw. Tip: If you decide to configure your own hands, do not forget about the revision of the main parts of this node. First, all the verge of bolts and nuts should be integer. Secondly, there should be no contamination. Finally, do not forget to replace or carry out a complete audit of gaskets.
Dnipro MT 9, MT 10, MT 10-36.
Here we describe how the Dnipro valves are adjusted. First of all, you need to firmly fix the motorcycle and install a bath for collecting oil under the cylinder head. After removing valve cover, drain the oil. Through the viewing window (for rubber stopper) we install the flywheel at the mark in or V.T. Concression tact. Check correctness of this paragraph. It is very simple - while both valves will be closed, and the rods will rotate freely. The next step is the audit of the gaps. For these models on the release, the gap is set - 0.07 mm, and for an inlet valve 0.05 mm. If deviations are determined, then the valve top nut weakens for adjustment, and rotating the adjusting bolt, located closer to the center, set the desired gap. After holding the adjusting bolt, we attract the lock nut and measure the gap again. After adjusting one of the cylinders, the valve cover leaves open, the flywheel turns until the mark will not appear in the window again. Then turn to another cylinder and measure the gaps by setting them into the necessary positions if necessary. When you make sure that both cylinders are adjusted - you can close the valve covers, topping the oil and conduct a trial launch.
Ural M-67, Ural Imz-8.103.
First of all, it is worth paying attention to that, unlike previous modelsthat intake and exhaust valve of these motorcycles are adjusted under the dipstream 0.05 mm. As before, we are convinced that the motor has cooled, and then, laying under the cylinder the container for collecting oil, proceed to the setting. First of all, remove the valve cover and drain the oil to get free access to the main nodes. Then we turn the motor before closing the intake valve. At this point, you can adjust the gap and its setting. For the exhaust valve, the motor rotate before its opening. The setting is carried out by rotating the valve rod, after the leaf of the lock nut. For a more accurate tuning, remove the valve lid and rotate the motor until the risk does not seem through the viewing window on the flywheel. If the risk coincides with the compression clock and the piston will be installed in the position of V.M.T., both valves will close and the rocker can be easily moved. If the risk appeared on the flywheel, and one of the valves is open, you can adjust the other cylinder. The adjustment itself is carried out, as before, with the exception of the moment that after each setup and tightening, it should be re-audited by all gaps, after several crankshaft turns.
You can also learn about a variety of species, and apply these tips in practice to your motorcycle.
Adjusting the valves of the Motorcycle Ural and Dnipro.
In the gas distribution mechanism, thermal gap in the valve drive is regulated. In order for the valve hermetically sitting on the saddle, it is necessary that at a time when the camshaft camshaft does not affect the pusher, there was a clearance between the valve and the drive parts. If there is no such a gap, the valve will be stored in the drive, will not sit on the saddle and will not provide hermetic fit. If the gap between the valve and the parts of the drive, on the contrary, will be too large. This will lead to the fact that the opening of the valves will be late. In both cases, it is hello to unstable engine operation, working it with interruptions (and if you still add a bad ignition, incorrectly selected candles, not adjusted carburetors, then the motorcycle will most likely refuse to start and work).
Clearance adjustment is produced on a cold engine. It is useful to know that the lower engine (motorcycles: M-72, K-750, Dnipro-12, MB-750) is reduced when driving the engine, and the Ural and Dnipro Motorcycles modern models). Therefore, for the low-flaped engines, a larger gap is prescribed when adjusting, and for superlap - less.
The external sign of increasing the gaps in the valve drive is a ringing metal knock in cylinder heads on a warm engine. Signs of lack of gap is the drop in the motorcycle engine of the Ural and Dnipro motorcycle, cotton in the carburetor.
And so let's go to the adjustments themselves:
1)
Adjusting valves on motorcycles M-72, K-750, MV-750, Dnipro-12
Clearance adjustment must be performed as follows:
· Unscrew the screw 9 Fig. 1 and remove the cover 10 together with the sealing gasket 8.
· To turn crankshaft Motor Motorcycle Ural or Dnipro until the inlet valve closes
· Loosen the locknut 5. adjusting Bolt exhaust valve rod pusher
· Screwing or unscrewing adjustable bolt 11 of the pusher 7, set the gap between the pusher 7 and the valve terminal 0.1 mm (the clearance should be checked by a dipstick)
· By setting the gap, correct the locknut 5, holding the adjustable bolt 11 key. Finally check the gap.
To adjust the inlet valve clearance, continue to turn the crankshaft until the beginning of the exhaust valve lifting and adjust the gap to the above described.
· Close the valve box with a cover of 10 with a gasket 8 and with a screwdriver securely fasten the fastening screw.
2) Adjusting valves on motorcycles Dnipro MT 9, MT 10, MT 10-36, etc.
When checking and adjusting the gap, you must put the bath under the cylinder head, remove the cylinder head cover and merge the accumulated oil. Install the piston in V.M.T. Compressive tact, taking the crankshaft so that the "B" label, applied on the flywheel, is combined with a label on the engine crankcase; Watching this is necessary through the viewing window in the engine crankcase with a rubber stopper. In this position, both valves, intake and graduation will be completely closed, and their rockers should swing freely on the axes. Then it is necessary using a flat probe to check the gap between both rockers and valves.
With incorrect gap, it is necessary to weaken the lock nut 1 (Fig. 2) and, rotating the adjustable bolt 2 in one direction or the other, to install the required gap. After that, tighten the lock nut. The gap is regulated when the engine is in cold condition; In this case, the gap should be equal to the graduation - 0.1mm ± 0.01mm, in inlet - 0.07mm ± 0,01mm. If the clearance is missing or very small, the valve will not fit tightly to his saddle at the time of closing; If the clearance is large, it will start opening the opening of the valve.
The magnitude of the gap should be checked if necessary. When adjusting the gap in another cylinder, you need to check the crankshaft per revolution (360º), after which it is checked and adjusting the valves as indicated above.
3) Valve adjustment by modern motorcycles Ural (M-67, IMZ-8.103, etc.)
The first thing I would like to note is that the clearance between the valve rod and the adjusting screw on the cold motorcycle engine of the Ural should be 0.05mm. Adjusting screws should not have clogged faces and must be completed.
Fashion first
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To adjust the gaps, it is necessary to remove the cylinder head cover and merge the accumulated oil. Then the lever of the starting mechanism to turn the crankshaft. With the beginning of the intake valve closure, the gap for the exhaust valve is adjusted and with the beginning of the opening of the exhaust valve adjust the gap for the inlet valve.Method of the second
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You need to install a piston of one of the cylinders into the upper dead point in the compression tact. It can be determined by risk on the flywheel, and the compression tact - by the position of the valves: both must be closed (at the opposite cylinder, with one of the valves will be open). After that, it is necessary to check the gap between the valve terminal and the rocker. If the clearance does not correspond to 0.05mm, then it is necessary to weaken the lock nut and adjust its adjusting bolt. After adjusting the gaps in one cylinder, turn the crankshaft per revolution and repeat operations on the second cylinder.I wish you good luck in the settings of your moto.
