How to disassemble a Carver chainsaw
How to disassemble a Carver chainsaw
For each owner of a personal house and a suburban area, a chainsaw is the right inventory, but its choice may be a truly difficult task, because the models of gasoline saw in a wide variety are now presented on sale. Through this tool, of course, to prepare firewood, trim the trees, also carry out work on the construction of verandas and arbors.
Not so long since the craftsmen used hacksaws and hand saws, but the development of progress made it possible to create a chainsaws that are now available for an ordinary consumer. If you also decide to acquire similar equipment, then it is fundamentally to control the most important properties, in addition to find which manufacturer is the best in your own area.
Carver chainsaws today can be safely called very popular, they are represented in various classes, in addition with different set of functionality. To perform household tasks, there is an option to prefer a chainsaw of an amateur level, however, semi.Professional and professional saws are suitable for construction professionals.
Malfunctions of chainsaws and how to repair the tire with your own hands
Chainsaws are a necessary thing in home and garden economy, which helps to quickly and efficiently perform various work with a tree. Like any electrical device, it periodically fails and requires diagnosis. The result of the latter event is often a conclusion about the need to repair the tire of the chainsaw. A mechanism experiencing most of the load during operation.
Carburetor’s carburetor device
Most modern chainsaws (Carver are not an exception) are either completely single.Type carburetors from one manufacturer (for example, WALBRO), or very similar in design. But even with distinguishes in the appearance of the case, the principle of operation of all carburetors is exactly the same.
But carburetors on Carver saws differ from other chainsaws with the availability of adjustment. Adjusting screws on most other models of saws are hidden under the housing and often have unique curly surges. Therefore, they can only be adjusted with special “branded” screwdrivers that are sold in service centers. Carver carburetor is regulated by a regular flat screwdriver. There are three holes under the adjusting screws in the housing. Therefore, the carburetor on the Carver chainsaw can be adjusted without even removing the casing.
The main nodes of the Carver carburetor
The carburetor of the chainsaw consists of the following main nodes:
- Cast housing made of light alloy;
- A membrane pump for manual pumping of fuel before launch (ledge);
- Nozzles (strictly calibrated holes in bronze bushings for dosed fuel supply);
- Float chamber;
Also in the carburetors of the chainsaws there are fuel channels, throttle (gas) adjustable damper, air damper, filters and adjusting screws.
Carver carburetor principle
After starting the power supply of the chainsaw, the air damper opens, the cleaned air with a thin cleaning filter enters the diffuser through it. There, through calibrated holes in the nozzles, gasoline gets. The amount of the air-fuel mixture that enters the carburetor into the combustion chamber is regulated by the position of a throttle tied with a thrust with a gas handle.
The needle valve covers the flow of gasoline into the carburetor when filling it. Gasoline before getting into nozzles passes through the filter, which reduces the risk of clogging calibrated holes in them.
That the three screws of the carburetor l, h, and t regulate three screws.
On old models of chainsaws only two adjusting screws. One of them regulates idle speed, just raising the throttle. When it is twisted, the passage under the damper increases, the supply of fuel into the combustion chamber increases, the engine increases speed. In fact, twisting “adds gas” without pressing the gas handle.
In modern carburetors of the Carver chainsaws, the idle adjustment screw does not regulate the throttle, but the amount of fuel flowing through the idle nozzle.
The screw l inside has a sharp needle.Shaped tip and regulates the main fuel duct through the calibrated hole of the nozzle.
In modern models of such screws there are two. One. L, regulates the main stream of fuel at low and medium speeds (not to be confused with idle). Second. N, determines the supply of fuel at maximum speed.
Illumored screw adjustment N can lead to unpleasant consequences. For example, CARVER CARVER ICE, designed for maximum revolutions of 12 thousand. About/min, with full gas, will develop a moment of momentum to 15 thousand. About/min and will fail. Over, any adjustment only N leads to the effort of fuel supply, and the engine can “sag” at certain speeds.
Checking the carburetor and signs of the need to adjust it
The nominal power of the engine and saving of fuel resource consumption depends on the good state of the carburetor. The carburetor of the chainsaw of a functional difference from the car does not have. He mixes the vapor of gasoline entering through the pipe and serves them further into the chamber for combustion.
- Air duct or tubes for air supply;
- Fuel pipeline or fuel tube for mixing it with air;
- Air damper.
A sign of the need to adjust the carburetor:
- Strong vibrations in view of screwing screws. The engine with a serviceable carburetor works evenly, the sound resembles a move of four tacts;
- Damage to the cap of protection;
- Wear of the piston system, which already requires a different mixture in composition;
- Involuntary drowning of the engine, the impossibility of its repeated or initial launch;
- Unreasonable increase in gasoline consumption, while the engine power may remain the same, and most often decline;
Check the settings
Having eliminated all the malfunctions of the chainsaw carburetor, it is necessary to check its serviceability on a cold engine.
- Run the saw;
- Gently click on the accelerator. The speed range from idle to maximum should be in the range of 3000-11500 rpm / min. They must be printed quickly;
- If the desired value is reached late, turn the screw l counts on the clockwise.
- If the frequency exceeds the plate, turn the screw h counterclockwise. This will reduce speed.
- Make sure the device is idling. If the circuit does not move, and the engine gains maximum speed, then adjustment is correct.
Fuel supply problems
When the inspection did not give results, you can proceed to the diagnosis of the fuel supply system. The reason for the system malfunction can be:
Here, first of all, you need to disconnect the fuel hose and check if the fuel follows from it. Provided that the fuel flows with a normal stream, then everything is fine.
If the stream is weak or completely absent, then you need to clean the hole of the cover with a needle. To clean the filter, it is necessary to drain fuel. Using the hook, the filter, along with the suction hose, gets through the filling hole.
The filter must be thoroughly cleaned or replaced by a new Chinese analogue, which has a low cost. Fuel filter cleaning should be carried out once for 3 months. With frequent use of the tool, the frequency of cleaning increases.
An important element of the system is the air filter. It is recommended to periodically clean it. You need to remove the filter very carefully, otherwise dirt can get into the carburetor.
Do.It.Yourself popular malfunctions and repair of a chainsaw
A chainsaw is a simple device that, with proper care, can last a long time. At the same time, the saw is a tool subject to various loads and, therefore, breakdowns are still found. About what caused a certain malfunction and how to eliminate it, you will learn from this article.
Dismantling of the Chinese chainsaw
Detailed photo instructions for the complete and consistent separation of all parts of the mechanism. On the example of the Chinese chainsaw, the principle of interaction of all structural elements is shown. Analysis is carried out on a clean drive, without a tire, chain, gasoline and oil.
To facilitate the manipulation of the object and the convenience of access to the details, first of all we remove the handle, unscrewing the tire cover in advance.
Having released space for maneuvers, you can proceed to the main components. Remove the top cover, air filter and candle.
Unscrew the mounting screws and remove the cylinder cover.
Remove the carburetor, for which we disconnect the air damper lever, unscrew 2 fasteners and take out the base of the air filter. Disconnect gas trigger and nozzles.
We extract the lever of the throttle of the throttle so that it does not interfere with further disassembly. To do this, remove the top cover of the handle, disconnect the thrust from the trigger and take out through the hole.
Remove the starter lid, unscrewing 4 screws.
We proceed to the separation of the case with the crankcase, removing the zealor and shock absorbers.
We start disassembling the engine by extracting the ring of the carburetor knee, gasket and heat insulator. For convenience, it is better to use narrow.Folds.
Unscrew the fixing nuts / screws and remove the muffler. We also take out the gasket and stilettos.
Now, the removal of the engine cylinder comes down to a simple twisting of 4 screws. You need a screwdriver or bit with a long rod.
To disconnect the piston from the crankshaft, remove the locking ring and take out the axis.
The ignition module is fixed with a pair of screws and removed for several screwdrivers of screwdrivers.
The clutch is unscrewed clockwise and rotates along with the crankshaft, which must be fixed by resting the axis on the handle of the pliers. You can use the key to corner grinding, or a hammer with a chisel, but it is better to take a special puller.
Ремонт бензопилы ” CARVER-262 “
Following the clutch, remove the drum with an asterisk, a needle bearing and worm gear.
Unscrew the side plate of the crankcase and the lid of the oil pump, after which we remove the oil pump itself.
We pull out the pipe connecting the pump to the oil tank.
We fix the crankshaft and unscrew the flywheel (counterclockwise).
Complete assembly of the chainsaw 3800 all the nuances and recommendations (Part 2)
Unscrew the lid and bite off the oil seal.
It remains to unscrew all the crankcase fixation screws and disconnect the halves (effort will be required).
Extract bearings from a crankcase, you can use ordinary tapping. To install closely, the place should be warmed up with a construction hairdryer.
At this stage, the analysis of the main components of the system can be considered complete. As you can see, the algorithm of actions is quite accessible and does not require special skills. The main thing is to pay special attention to small elements. In order not to get confused in the abundance of screws, bushings, cuffs, gaskets and stoppers, it is better to group them in separate containers and at the same time remove the process on the camera.
If difficulties arise in reconstructing the original tool, you can always turn to the list above with the plan of the components. As an addition, we recommend watching the next video, where the maximum assembly of the chainsaw with the most valuable Комментарии и мнения владельцев of the author is demonstrated.
How to disassemble a stihl chainsaw
Most modern motorcycles, especially the budget segment, have an extremely similar and sometimes completely identical design. With increasing cost and class (amateur, professional), the tool begins to differ in an increasing set of unique features. Of course, the principle of work is the same for all and fundamental differences are absent, but the cunning of the interaction of some components sometimes finds even an experienced user by surprise.
DIY chainsaw repair
All malfunctions of the chainsaws can be divided into two main groups: engine problems with all its nodes and systems (ignition, fuel supply system, cylinder-piston group, exhaust system) and malfunctions of other nodes (circuit brake, lubrication system, clutch, tire, etc.).
- The engine will not start;
- Starts, but stalls;
- It works unstable;
- Does not develop power, t.E. It works normally at idle, but stalls under load.
When repairing the chainsaws with your own hands, you need to act by exclusion. Check all possible causes of the malfunction alternately, starting with those, the verification and elimination of which takes less time (about the device and operation of a two.Stroke engine, see here).
Ignition system. Almost all types of engine malfunctions listed above may be called the ignition system failures. Therefore, when they occur, it makes sense to start searching for a malfunction from the candle. This is all the more justified that the state of the latter can give useful information about the operation of the fuel system. So, when a problem occurs, you need to turn out the candle and inspect it.
The wire is disconnected, and the candle is twisted with a special key.
If the candle is dry, this means that the problem is most likely not in the ignition system, but not admission to the fuel mixture cylinder. You can wrap the candle back and take for the fuel system. If the candle is strongly sprayed with the fuel mixture, then there is its excess. This can happen from the dilution of the carburetor or violation of the launch rules. The candle is wiped and dried, the cylinder is drained, blocked by the fuel supply and working with a starter. To exert a combustion chamber and remove excess fuel. Then set the candle in place and repeat the launch.
The presence of a large amount of black carrier also indicates malfunctions in the fuel system.
The ratio between oil and gasoline in the mixture may be disturbed, the carburetor is not adjusted or poor.Quality oil is used. The candle is washed in gasoline, cleaned with a needle or an awl from the carbon, clean the electrodes with a small skin and installed in place.
In all these cases, it will not be superfluous to check the gap between the electrodes of the candle. Depending on its brand, it should be in the interval of 0.5-0.65 mm. You need to check the sealing of the candle. With its worn out or damage, the tightness of the combustion chamber may not be ensured, which leads to a decrease in compression in the cylinder and problems in the engine operation.
Even if in the case of checking the candle there is large reasons to believe that the malfunction is in the fuel system, you need to check the candle for the presence of a spark. At least in order to be sure that everything is in order with this. For this:
- Put on the spark plug on the candle;
- Using pliers with insulated handles, apply a thread or a candle nut to the cylinder;
- Pull the header’s handle and look. There is a spark or it is not.
In the absence of a spark, you just need to replace the candle. If the new candle does not have a spark, you need to check the condition of the high.Voltage wire for the presence of a cliff and contact with the candle.
The reason for the lack of a spark can be a faulty ignition module or a disruption of the gap between it and the magneto pipeline of the flywheel. It should be equal to 0.2 mm. The disruption of the gap becomes especially probable if before this was the disassembly of the saw from the filming of the flywheel and the ignition module. The gap is exhibited with a gasket with a thickness of 0.2 mm placed between the boss of the flywheel and the ignition module. Failed ignition module should be replaced.
By checking the ignition system in this way and without finding a malfunction, you can proceed to the fuel mixture supply system.
Fuel supply system. If the candle with a candle was established that the fuel does not enter the cylinder, you need to consider all the possible causes of this. It can be:
- Not the intake of the fuel from the tank due to the clogged hole in its lid (sapuna), while a vacuum is created in the tank that prevents fuel from flowing;
- Pollution of the fuel filter installed in the tank;
- Non.Admission or insufficient intake of the fuel mixture from the carburetor to the cylinder.
To diagnose the first two reasons, it is enough to disconnect the fuel hose from the carburetor and see if the fuel flows from it or not. If it flows with a full stream, the sappan and the filter can not be checked, if it does not flow or flows weakly, we can assume that the cause of the malfunction is found. The sapun is cleaned with a needle. The fuel filter is extracted through the flood hole of the emptied fuel tank, with a wire hook, along with the suction hose, from which the filter is disconnected and cleaned or replaced by a new. Mastery manufacturers recommend changing the fuel filter every 3 months.
Insufficient intake of the fuel mixture from the carburetor to the cylinder or a violation of the correct ratio between fuel and air mixed in the carburetor can occur for several reasons: due to the air filter, unexplored carburetor, clogging its channels or mesh-filter.
As a rule, the repair of the chainsaws is not complete without cleaning the air filter, since it is polluted quite quickly. When this happens, the flow of air into the carburetor decreases, the fuel mixture at the exit from it is too enriched, which violates the normal operation of the engine. Removing a dirty filter for cleaning must be carefully so that the dirt from it does not get into the carburetor. The filter should be cleaned or washed in water with some detergent, dried and installed back.
Carburetor’s resolution is eliminated by its adjustment. This is usually done using three screws. Maximum and minimum revolutions and a blank screw. Adjustment should be carried out in strict accordance with the instructions, the non.Compliance of which can lead to engine breakdown. Some saw manufacturers leave only one adjusting screw (idle turnover). To exclude the unwanted intervention of inexperienced users in the carburetor operation. An example of adjusting the chainsaw carburetor See in the article a chainsaw work.
If the adjustment of the carburetor did not help, you need to clean its channels and a filter net, and at the same time check the integrity of the membrane. The carburetor is one of the most complex devices of the chainsaw, so you need to proceed with its disassembly and cleaning with a complete understanding of the responsibility of this operation. It consists of many small details that have a feature to slip out of their places and irrevocably lost, so that, having dismantled this capricious device, you can not collect it.