You will need
- - screwdriver with flat and Phillips blade;
- - wrench set;
- - cleaning compositions, lint-free cloth;
- - ultrasonic cavitation bath
Before proceeding, drain the fuel from the gas tank. Unscrew the mounting screws on the top cover of the chainsaw and remove it. Remove the air filter housing, the filter element and remove the housing by removing the nuts. Often, in addition to the screws, the casing is held with clamps. Otdelnie them by clicking the appropriate tabs. On the right side of the carband remove the fuel hose and pull the air damper. Unscrewing the mounting screws and nuts on the body of the carband remove it and remove the cable terminal from the lever throttle.
On the left side pull the fuel hose from its fitting. Remove the screw of adjustment of idling speed and the fixing screw top cover carb. Remove the top cover and find the fuel diaphragm fuel pump having a blue transparent strip. On the left side of the case you find the screws with spring clips. After removing the bracket, Unscrew the screws. Record label or remember their installation locations to avoid confusion during Assembly.
Unscrew the screws on the bottom cover of the carband remove this cover. Remove the node of the needle valve by removing the screw. Be careful – under duplechin lever valve actuator is installed spring. Unscrewing the screw of the air shutter, remove it. Then remove the axle of this valve, by applying force along it. Hole axis of the air vent cover in advance with your finger, in order not to lose the spring loaded ball in it.
Remove the throttle valve by loosening the screw of its fastening. Then remove the lever of an actuator and a spring washer-stopper. Please note: the screws securing the throttle interchangeable and the screw of fastening of the lever of an actuator is very similar but has a different length. Don't mix up the screws when assembling. In conclusion, remove the throttle shaft, noting its correct position.
Lay on the table all the details of the carband inspect them with the purpose of Troubleshooting. Worn parts and damaged gaskets replace the new. All parts are thoroughly rinse with the use of specialized detergents and dry with a lint-free cloth. The nozzles and tubes dry with compressed air. For easy purge use manual or foot-operated air pump.
With the purpose of increase of efficiency of cleaning of the parts in the carband use an ultrasonic bath, for cleaning using the cavitation effect. To do this, fill it with gasoline or diesel fuel, put in it all the necessary elements of the carband and turn for 2-3 period of 5 minutes each. At the end of the process blow the parts with compressed air.
Advice 2: How to adjust the carburetor of a chainsaw
For a flawless and long-term operation of a chainsaw is required to periodically adjust the carburetor. This should be done taking into account the specific brand of your device, and standard parameters specified in the technical manual supplied with the saw. The correct adjustment of the carburetor will depend on the efficiency of the entire technical system.
You will need
- - the manual of a chainsaw;
- - tachometer;
- - screwdriver.
Check device chainsawset forth in technical documentation for it. Determine the location of the jets of the carb and the adjustment screws. The standard carb has usually two or three screw controls the fuel mixture adjustment screw idle speed, and screws the jets high and low speed.
To adjust high and low engine speed saw, use the appropriate screws. They regulate the ratio of fuel and air that is determined by the degree of throttle opening. For the lean mixture screw in the corresponding screw clockwise. If necessary, increase the engine speed (i.e. richer mixture), remove the screw by rotating it counterclockwise.
Adjustment of idling speed is also carried out by rotating the right screw. Turn the knob in the direction of clockwise to increase the frequency of idling. To reduce engine speed slowly turn the screw in the opposite direction.
When adjusting the carburetor , keep in mind that the initial stage of operation of a chainsaw is necessary to keep the factory settings. Exposed the factory settings are calculated for a richer mixture. After hours of work the saw can begin to self-adjust the carb.
Run the saw at full speed for 10-20 seconds. Then, Unscrew the needle valve the high speed counterclockwise. Ten seconds with a tachometer check the maximum engine speed and contrast the findings with those specified in the technical passport of the device. Too lean makes the saw "scream"; the excessive enrichment of the mixture of smoke from the muffler.
Observe when you change settings caution since a sharp change in the number of high speed greatly affects the power device and the rotation speed of the circuit. The depletion of hot mix leads to unnecessary, excessive rpm, which can lead to damage to the chainsaw down.