How to Remove Magneto Chainsaws Without a Puller

Petrol-powered saw "Taiga-245"
Manual
00.245.0.777 RE

This operating manual (OM) is intended to familiarize yourself with the device of the chainsaw, contains a brief technical description, the rules for the operation and maintenance of the Taiga-245 gasoline-powered saw. ”
For safety reasons, do not use a chainsaw until you have read the manual. Compliance with requirements (RE) helps to increase the life of the chainsaw. Some discrepancies between the illustrations in this publication and the product are possible due to technical improvements in the design of the gasoline-powered saw.
If you have any suggestions or comments, please contact the manufacturer at the following address: Russian Federation, 614990, Perm, ul. Dzerzhinsky, 1. Federal State Unitary Enterprise Mashzavod im. F. E. Dzerzhinsky. " Contact phone (3422) (39-80-81), fax (3422) 39-86-17; for acquisition and after-sales service, please call (3422) 39-80-17.
^ 1 DESCRIPTION AND OPERATION OF THE PRODUCT
1.1 Purpose of the product
The Taiga-245 gasoline-powered saw is equipped with low handles and is designed for felling trees, with a whip volume of up to 0.35 m3, cutting branches, bucking and cutting lengths, performing preparatory, construction and auxiliary works.
1.2 Specifications

1.2.1 General parameters of the chainsaw

One-man chainsaw control
Dry weight, kg, not more than 8.95
Overall dimensions, mm, no more than 1900Х280Х300
Capacity:
fuel tank, l From 0.7 to 0.8
oil tank, l From 0.25 to 0.35

Performance in any spatial position is ensured
Start by integrated starter
Ignition switch toggle stop

Cm2 / s, not less than: 70
Weighted total vibration acceleration on the handles
chainsaws, m / s2, no more than 12.5

Sound level dBA, no more than 105

How to Remove Magneto Chainsaws Without a Puller

1.2.2 Main engine parameters:

engine’s type
single cylinder two stroke

Displacement (estimated), cm3 75
Bore 50 mm
Power at crankshaft speed (7000 ± 500) min-1
kW (hp), not less than 2.6 (3.5) Engine speed min-1
In operating mode 7000500
Idling No more than 2600

Specific fuel consumption at maximum power, g / kW. h
(g / l s.h.), not more than:
With carburetors
KMP-100US
Fuel consumption idling, kg, not more than:
With carburetor KMP-100US 600 (440)

A mixture of motor gasoline A-72 GOST 2084-77 or unleaded Normal-80 GOST R 51105-97 with engine oil M-8V GOST 10541-78 in a ratio of 20: 1 by volume

Engine Fuel Mixture

Saw chain Automatic, by means of a plunger-type pump with the supply of lubricant to the groove of the saw bar: in summer. with oil used for the fuel mixture; in winter, with the same oil, but diluted with gasoline in a ratio of 3: 1 (1 part gasoline)

Drive oil pump Grease TsIATIM-201 GOST 6267-74

Carburetor Flameless, membrane type
Fuel supply from the tank to the carburetor with a pump integrated in the carburetor
Ignition from electronic contactless magneto EM-2
AM17V spark plug with a sealing ring and a contact nut like "A"
Ignition timing Fixed 320 to TDC

1.2.3 Main parameters of the cutting chain device:
Working length of the console of the saw tire, cm 40
Universal chain with 9.3 mm pitch
through friction centrifugal clutch and drive
crankshaft sprocket
1.3 Product Composition
The mutual arrangement of the main mechanisms and assembly units of the chainsaw, as well as the controls, is shown in Figures 1.2.
An individual set of spare parts and tools are attached to the chainsaw. 1.4
Device and work
1.4.1 Engine
The main assembly units of the engine (Figure 3) are: cylinder 5, piston 6, crankshaft 8, crankcase 17.
To balance the engine, a dynamic balancing mechanism is introduced in its design, a diagram of which is shown in Figure 4.

Figure 3. Longitudinal section of the engine

.1. connecting rod; 2. piston pin; 3. needle roller 1,6х12; 4. deflector; 5. cylinder; 6. the piston; 7. piston ring; 8. crankshaft; 9 — central gear of the balancing mechanism; 10 — bearing. 464503U1; 11. clutch; 12. a leading asterisk; 13. a worm of the oil pump; 14 — oil pump housing; 15. special screw; 16 — bearing 6-202; 17. a case; 18. a sealant; 19. impeller; 20. segment key; 21. fan cover.

Figure 4. Scheme of the balancing mechanism

1.4.1L Engine Power System
The engine power system consists of a carburetor, a fuel tank and a gas intake with a breather.
The membrane type carburetor is equipped with a fuel pump, a pressure regulator, a group of adjusting screws, air and throttle valves.
The air filter cleans the air entering the carburetor from sawdust and dust.
The scheme of the KMP-100US carburetor device is shown in Figure 5.

Figure 5. Diagram of the carburetor KMP-100US

1 — output valve; 2 — intake valve;.3 — carburetor membrane;
4. small gas screw; 5. screw full throttle; 6. a lock spring; 7. air damper (start); 8. atomizer of the main system; 9. diffuser: 10. throttle lever; 11. stop screw; 12. carburetor body;
13. throttle valve; 14 and 15 — atomizer of a small gas system; 16. fuel channel of the small gas system; 17. check valve; 18. spring; 19. valve seat; 20. valve lever; 21. a fuel cavity of a pressure regulator; 22. pump membrane; 23. case; 24. pump cover; 25. the cavity of the booster pump; I. fuel supply; II. communication with the atmosphere; III. air flow; IV. pressure from the crankcase.
1.4.1.2 ignition system
The ignition system consists of a non-contact magneto, providing sparking at a crankshaft speed in the range from 600 to 10,000 rpm, an ignition wire, a spark plug, a switch and connecting wires.
The ignition circuit is shown in Figure 6.

How to Remove Magneto Chainsaws Without a Puller

Figure 6 — Ignition circuit from an electronic contactless magneto

1 — base; 2. a nut; 3. high voltage transformer; 4. generator coil; 5 —capacitor; 6. diode block; 7. crankcase risk; 8. risk of the basis; 9. conductor to the ignition switch; 10. ignition wire of the PVVP; 11. a candle; 12. screen; 3. switch.

Contactless electronic magneto includes a magneto base 1 and a four-pole flywheel mounted on the crankshaft of the engine. The magneto base is attached to the engine crankcase using nuts 2. On the base are mounted: high-voltage transformer 3, generator coil 4, capacitor 5, diode block 6.
The ignition wire consists of a wire of PVVP 10 and an insulator with a contact screw enclosed in a screen 12.
The spark plug 11 has a thread M14X1.25. The optimum gap between the electrodes of the candle is from 0.5 to 0.65 mm.
When the engine is operating in maximum power mode, a spark between the electrodes of the spark plug appears when the piston does not reach the top dead center by 3.66 mm, which corresponds to an ignition timing of 32 °.
The switch located on the left half of the crankcase is connected via a conductor 9 to the winding of the generator coil 4 and serves to stop the engine.

1.4.1.3. Engine start system
The engine is started by crank 5 of the starter (Figure 2) built into the fan cover.
The starter consists of a drum with a ratchet mechanism, a starter cord with a handle and a winding spring.
When pulling the starter cord by the handle, the ratchet engages with the flywheel dogs and rotates the crankshaft. In this case, the starter spring is twisted. After starting the engine, the dogs disengage from the ratchet, and the spring, unwinding, winds the starter cord on the starter drum.
1.4.1.4 cooling system
The chainsaw engine has an air cooling system. Air is pumped by the fan through the grill cover 21, passes the cochlea 17, the intercostal space of the cylinder 5, cools it and is released into the atmosphere. To ensure uniform cooling of the cylinder, a deflector 4 is used in the engine design (Figure 3).

1.4.1.5. Gas emission system
The exhaust system consists of a silencer 5 (Figure 1) connected to the exhaust window of the cylinder.

1.4.2 Cutting chain device (RCU).
The working body of the chainsaw is the RCU, consisting of a saw bar 7 with a driven sprocket and a saw chain 6 (Figure 1).
To adjust the tension of the saw chain, use a screw located at the end of the platform under the saw bar. When tightening the screw, the chain is pulled. When unscrewing, it loosens. The friction clutch 11 consists of a lead having a left threaded connection with the end of the crankshaft 8 (Figure 3), clutch pads provided with friction material.

1.4.2.1 lubrication system
The forced lubrication system consists of an oil tank, made in one piece with the crankcase 17 (Figure 3), an oil pump and a system of channels for supplying lubricant to the rubbing parts of the RCU. The oil pump is mounted in the crankcase 17 and is driven from the hub through the clutch 11 and the worm 13

1.4.3 Governing bodies.

The controls include: a rear handle with suspension and a carburetor control mechanism.
On the rear handle below the gas cuff 2 (figure 1) and lever 1 (figure 2), blocking the gas cuff from accidental pressing. After pressing the lever, the gas lock is removed and the carburetor throttle is freely controlled.
The lock button 2 (Figure 2) fixes the middle position of the gas cuff when the engine starts.

^ 2 PURPOSE FOR USE

2.1 General instructions.
Before starting work, carefully read the safety instructions and check the technical condition of the chainsaw.
It must be remembered that only careful and proper care of the chainsaw will ensure the reliability of its operation for the entire period of operation, guaranteed by the manufacturer.

2.2 De-preservation of chainsaws
2.2.1. To prepare for work, the chainsaw needs to be re-opened in the following order:
a) remove the grease from the outer surfaces of the assembly units and parts with a rag soaked in gasoline and wipe it dry;
b) rinse the candle in gasoline, dry it and wrap it in the candle hole in the cylinder.
2.2.2. During re-preservation, oil, gasoline and dirt are not allowed to enter the high-voltage ignition wire and fan.
2.2.3. In the cold season, de-preservation of the chainsaw should be carried out indoors at a temperature of plus 15 to plus 20 ° C. At low temperatures, re-preservation is difficult due to thickening of preservation grease. 2.4 Preparing the chainsaw for work
2.4.1. Unscrew the two nuts 9 and remove the sawdust reflector 10 (Figure 1).
Install the tire with an elongated groove on two studs, and slide it to the leftmost position.
Install the saw chain on the tire and the drive sprocket so that its cutting edges on the lower branch are facing towards the engine.
Install reflector on studs.
While moving the chain tension slider, screw the tab on the slider and the hole on the bar with a screw. Press the reflector against the tire, while the protrusion of the slider should enter the hole in the tire. Screw the nuts 9, not fixing them completely.

2.4.2. Tighten the chain by turning the screw until the lower branch is sagged.
With proper tension, the chain should fit snugly on the guide rails of the saw bar and move freely along the bar when pulled by hand. When the chain is pulled by hand in the middle of the saw bar with a force of up to 3 kgf (30 N), the chain should exit the groove of the bar, forming a gap of 3 to 4 mm between the bar and the connecting side links. After tensioning the chain, finally tighten the nuts 9.
After a short operation, new chains are stretched, therefore, after several cuts, it is necessary to check again and, if necessary, adjust the tension with the implementation of the techniques described above.

2.4.3. Prepare the fuel mixture and fill the fuel tank with it. It is recommended to prepare the fuel mixture centrally, and deliver to the cutting area. The oil for the preparation of the mixture should be liquid, for which it is recommended to heat it in cold weather.
The use of the brand of gasoline and oil, as well as their ratio, are given in the "Specifications" section.
Mix the mixture thoroughly before each refueling of the chainsaw into the fuel tank.

2.4.4. Fill the oil tank of the chainsaw with cooked. oil.

2.4.5. Wipe off parts of the chainsaw that were accidentally doused during refueling with a clean rag.

2.5 Starting and stopping the engine

2.5.1. To start the engine is necessary;
a) make the chainsaw stable
b) fix the gas cuff 2 (Figure 1) with the locking button 2 (Figure 2) in the middle position; c) extend the cold start lever 3 (Figure 2) to the full (the carburetor air damper is closed);
d) put the ignition switch in the opposite position:
“OFF.”
d) hold the chainsaw with the left hand by the front handle, with the toe of the right foot proceed to the bracket of the rear handle;
f) with your right hand, gently pull on the starter grip until the starter engages with the flywheel and then pull the cord sharply Repeat the operation until the first flash in the engine cylinder;
Repeat the operation until the first flash in the engine cylinder;
g) after the first flash in the engine cylinder, return the cold start lever to its original position;
h) sharply pulling the cord by the handle of the starter to start the engine.

Notes
1. When starting up, do not pull the cord to failure to avoid starter breakage.
2. After pulling the cord, do not let the starter handle out of your hand to avoid a sharp blow, but gently lower it to the starter.

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2.5.2 At an ambient temperature below minus 23 ° C, warm up the chainsaw before starting in a warm room.

2.5.3. To ensure satisfactory engine starting, the full production of the fuel mixture from the fuel tank is not recommended.
Warm up the engine or, after recent operation, start with the air damper fully open.
If the warm engine does not start after many attempts, it is necessary to blow out the cylinder and engine crank chamber by repeatedly cranking the engine crankshaft with the starter with the candle turned out and the shutters fully open

2.5.4. To stop the engine, turn the switch to the “OFF” position.

2.6 Saw chain preparation

2.6.1. The Taiga-245 chainsaws use universal saw chains, with which it is possible to saw at any angle to the direction of the wood fibers.

2.6.2 Sharpening of saw chains is usually done in sawmills and pilot stations on grinding machines. You can also sharpen the teeth of the chain as they become blunt with a KTsN-5.5 cylindrical file. High-performance and economical operation of the chainsaw is largely determined by the quality of the grinding of the teeth of the saw chain
2.6.3 Recommended angular parameters of the teeth and reduction of the limiting protrusion, depending on the hardness of the wood are shown in Figure 7,
The height of the limiting protrusions of the teeth of the chain should be the same and they must be underestimated after three or four sharpening of the chain.
Typically, the saw chain loses its function due to wear on the hinges, so it is necessary to carefully ensure that there is always oil in the oil tank to lubricate the RCU, as well as the operation of the oil pump. It is recommended between work, and in pilot workshops it is imperative to place the saw chain for a while in liquid oil, preferably heated.
2.6.4 Sharpening the chain with a cylindrical file should be done on the saw bar without removing it from the chainsaw, or on a removed saw bar clamped in a vice. When sharpening the chain, move the file away from you. The file must not touch the chain during reverse movement. When replacing defective cutting links of a chain, it is necessary to grind the cutting edges and restrictive protrusions of the new links to the level of the cutting edges and restrictive protrusions of the remaining links, and then sharpen the chain from one setting.

2.7 Operation

2.7.1 Running in a new chainsaw

2.7.1.1 After the decommissioning of a new chainsaw, it is necessary:
a) run the engine of the chainsaw at idle with the development of two volumes of the fuel tank of the chainsaw, with periodic rebasing after 5-8 minutes, with the oil content in the fuel
mixtures in a proportion of 15: 1 by volume;
b) during the operation of a new chainsaw during the first 25 hours of operation, an intensive running-in of all its rubbing parts occurs, so during this period it is necessary to carefully ensure that there are no engine overloads, overheating, as well as prolonged slipping of the coupling.

2.7.1.2. At the end of the 25-hour run-in, perform the following work:
a) inspection of the crank group, remove carbon deposits in the combustion chamber, channels and cylinder windows, from the piston bottom, piston grooves and rings, clean the spark plug.
After removing carbon deposits, rinse the parts with gasoline;
b) check the tightness of the fasteners (flywheel, carburetor, crankcase, etc.) and assemble the chainsaw;
c) prepare the fuel mixture in a ratio of 20: 1, pour it into the gas tank and adjust the carburetor to the maximum cutting performance. The use of a fuel mixture in a ratio of 20: 1 on a non-rolled engine is not allowed.

2.7.2 Felling, pruning and bucking

2.7.2.1 Felling, pruning and bucking of forests may be performed by persons who have been trained and trained for these
works.

2.7.2.2 Felling trees with a chainsaw is done on a prepared cutting site. Previously, dangerous trees are removed on the cutting area: hovering, dry, with rotted
trunk, strongly inclined.

2.7.2.3. When preparing a workplace around the tree, the undergrowth and undergrowth are cut down, the dead wood and large stones that interfere with the felling are removed. In winter, rake or trample snow on the basal
site. To leave the minder, when a tree falls, a path is cleared from 4 to 5 meters in the direction opposite to the fall of the tree, at an angle of 4502.8 Instructions for adjustment

2.8.1 Setting the ignition timing
The ignition timing is set at the factory and fixed by applying risks 7 on the crankcase against risks 8 on the basis of 1 (Figure 6). During the repair of the ignition system, when installing magneto, it is necessary to combine these risks.

2.8.2 Adjustment of the carburetor K.MP-100US.
A chainsaw comes to the consumer with an adjusted carburetor. However, after the end of the running-in period of a new chainsaw, as well as during further operation, with sharp temperature fluctuations (winter, summer) and when working in the mountains, the carburettor should be adjusted to ensure minimum idle speed, good throttle response, maximum performance and minimum costs fuel.
The carburetor is adjusted by three screws, the location of which is determined by the holes on the fan cover and deflector. Screw 4 (Figure 4), located in the hole marked “X”, controls the composition of the air-fuel mixture when the engine is idling. Screw 11, with the air filter cover removed, controls the amount of working mixture entering the engine. By turning the screws 4 and 11, an optimally stable engine speed at idle is adjusted with minimum fuel consumption. At the same time, the saw chain must not move along the bus, the engine must have good throttle response, i.e., when the gas cuff is pressed sharply, gain speed quickly and not stall.
If the engine does not develop revolutions or stalls when the gas cuff is pressed sharply, screw 4 must be partially unscrewed, while idle speed is reduced. To increase speed, partially tighten screw 11.
After adjusting the carburetor to idle, the engine is adjusted for maximum sawing performance. This adjustment is provided by the rotation of the screw 5 located in the hole marked "P". By changing the position of the screw 5, partial screwing or unscrewing, with subsequent checks of the chainsaw by working in the cut, the maximum cutting performance is achieved. In the initial period of operation, due to the lack of experience in adjusting, there may be cases of a complete carburetor deregulation, while the chainsaw ceases to work satisfactorily and engine starting is complicated.
To restore normal adjustment, it is necessary to set screws 4,5 and 11 to the initial position:
a) screw 4 fully tighten, then unscrew, 11/4 turn
b) screw 5 to tighten, then turn out 1/3 turn;
c) start the engine and set the minimum stable idle speed with screws 11 and 4.
After restoring the initial position of the adjusting screws, make the desired carburetor adjustment according to the above methods

2.8.3 Adjustment of the carburetor KS-16 (Figure 10).
Carburetor adjustment is carried out by three adjusting screws located on the carburetor body.
Screw 17. to regulate the composition of the fuel-air mixture of the idle system.
Screw 12. to regulate the amount of fuel-air mixture in order to ensure minimum crankshaft idle speeds.
Screw 5. adjust the amount of fuel at maximum power.

2.8.3.1. Adjust the carburetor at idle as follows:

2.8.3.2. Start the engine and warm it up for 1-3 minutes by adjusting the adjusting screws, 17 and 12, the ratio of the composition and quantity of the combustible mixture, set the minimum stable engine speed, avoid excessive smoke from the engine muffler, while the engine must have good throttle response, then there is a sharp opening of the throttle 15 should quickly, without failures, gain momentum.

2.8.3.3. If the engine does not gain momentum or stalls when the throttle valve 15 is suddenly opened, the screw 17 should be partially unscrewed, while the engine speed should be reduced.
To maintain the required idle speed, screw 12 must be partially tightened, as a result of which the amount of the combustible mixture will increase, and the engine speed will increase. 2.8.3.4. If there is excessive smoke at idle, partially tighten the screw 17. the engine speed will increase, to reduce them partially unscrew the screw 12.

2.8.3.5. Adjust carburetor at maximum power.

2.8.3.6. After adjusting the carburetor at idle, adjust it at maximum power by changing the position of the screw 5 by partially rolling or unscrewing it with subsequent engine checks under load, achieving the best performance.

2.8.3.7. In the initial period of operation of the engine, due to the lack of experience in adjusting, there may be cases of a complete deregulation of the carburetor, as a result of which the starting of the engine is complicated, the throttle response and power indicators are worsened.

2.8.3.8. To restore normal carburetor adjustment:

2.8.3.8.1. Set the screw 12 to its original position so that the throttle lever 13 rests on the middle part of the cone of the screw 12.

2.8.3.8.2. Tighten screws 5 and 17 as far as they will go, after which they turn out one and a half turns.

2.8.3.8.3. Start the engine and set the minimum stable idle speed with screws 12 and 17.
2.8.3.8.4. Set engine to maximum power with screw 5.

2.8.4 Guidelines for adjusting the chain brake.
Before operation, check the operation of the chainsaw brake. To do this, at maximum engine speed without load, apply the brake by abruptly pushing the left hand onto the brake frame 4 (Figure 1), while the saw chain should stop instantly. If the brake band 2 is worn (Figure 9), when the saw chain does not instantly stop, adjust the brake. To do this, move the free end of the brake band to the right in the window located next to the liner 3, and install the adjusting washer 1 on the left side of the band. Recheck the brake. If, when the engine is operating at maximum speed, the coupling hub is heated and sparks from under the brake band are observed, then it is necessary to install the adjusting washer on the right side of the band. Figure 9. Saw chain brake

1. an adjusting washer; 2. brake tape; 3. loose leaf

Figure 10. Diagram of the carburetor KS-16

1. fuel filter; 2. a spacer; 3. regulator lever; 4. a regulator spring; 5 — adjusting screw “PG”; 6. fuel valve;
7 — launch gate; 8. roller starting flap; 9. case; 10. check valve; 11. a cover; 12. screw adjusting "Pkh";
13. throttle lever; 14. roller throttle shutter; 15 — throttle valve; 16. damper membrane; 17. adjusting screw "XX";
18. regulator membrane; 19. fuel supply fitting; 20. feed pump valve; 21. a membrane of the pump; 22. fuel pump housing;
23. discharge pump valve; 24. axis of the regulator lever; 25. axis with a flag;
I. air flow; II. fuel supply; III. the hole of the air regulator; IV — pressure (rarefaction) of the crankcase;
Abbreviations: “XX”. idle
PG. full throttle
"Пхх". crankshaft idle frequency (low gas) 2.8.5. When assembling the balancing mechanism (Figure 4), align the marks on the gears with the piston position in V.M.T., while the balances should be located in the direction of N.M. T.
^ 3 MAINTENANCE

3.1. For uninterrupted operation of the chainsaw and increase its service life at high productivity, it is necessary to follow the recommended working methods, maintenance methods and the following rules:
a) observe the proportion of the fuel mixture, measuring the quantity of gasoline and oil with a measuring vessel;
b) apply only those specified in the section “Technical characteristics of the brand of gasoline and oil;
c) do not work on clean gasoline (without oil) and do not use leaded gasoline. Do not allow water and snow to enter the fuel mixture;
d) pour the fuel mixture into the fuel tank of the chainsaw from the portable tank. After zadraki, wipe all accidentally drenched parts of the chainsaw dry;
d) timely replenish with grease the oil tank and the cavity of the worm pair of the oil pump. Do not operate the chainsaw without lubricating the chain;
e) during operation, ensure that the chain is correctly tensioned. Do not work with a dull or damaged saw chain, or without separate assembly units and parts removed from the chainsaw;
g) transport the chainsaw with a sheathed saw bar or without a saw chain and bar, and lubricate the chain and bar with oil for prolonged storage;
h) protect the chainsaw from mechanical damage during operation, transportation and storage, and also not to disassemble it unnecessarily.

3.2 Maintenance work.

3.2.1 Daily
a) before working, check the serviceability of the chainsaw, the tightness of the fasteners and the adjustment of the tension of the saw chain b) if necessary, check the spark plug and clean it of soot, the gap between the spark plug electrodes should be from 0.6 to 0.7 mm; adjust the clearance by folding the side electrode, rinse the candle in gasoline after cleaning;
c) in between work, clean the fan grill;
d) after work, clean the intercostal space of the cylinder, and the outer surfaces of the chainsaw from sawdust and dirt. Remove pressed sawdust from the groove of the tire. Rinse the air filter in gasoline. Untimely cleaning of the intercostal space of the cylinder from sawdust leads to poor cooling of the cylinder. To overheating and accelerated wear of the chrome coating of its inner working surface;
d) after the end of work in the winter, drain gasoline from the fuel tank;
e) lubricate the driven sprocket of the saw bar with immersion oil heated to a temperature of plus 40 to plus 60 ° C.

3.2.2. After 50 hours (15-20 shifts) of work:
a) lubricate the starter spring, the axis of the drum, the axis of the flywheel pawls with automobile oil intended for the preparation of the fuel mixture;
b) grease the bearing of the drive sprocket, the worm pair of the oil pump and the seating surface of the worm with grease
TsIATIM-201 GOST 6267-74 or grease Constalin-1 or Constalin-2 GOST 1957-73;
c) rinse with gasoline the cavities of the fuel and oil tanks, the oil filter and the gas intake;
d) remove deposits of carbon deposits in the combustion chamber, channels and cylinder windows, from the piston bottom, piston grooves and rings. After removing carbon deposits, wash the parts in gasoline.
Untimely removal of carbon deposits leads to premature wear of the chrome coating on the walls in the working cavity of the cylinder and jamming of the piston rings in the piston grooves;
d) tighten the fasteners (cylinder, carburetor, magneto, etc.). An insufficient tightening of the cylinder fasteners can lead to a break in the cylinder flange.

3.2.3. After 100 hours of work, the following is additional to the above:
a) remove carbon deposits from the muffler. Boiler silencer in water with caustic soda is allowed;
b) disassemble the carburetor and rinse it thoroughly in gasoline.

3.2.4. After 200 hours of work, in addition to the above, do:
a) replace the set of piston rings from a single set of spare parts;
b) disassemble the clutch and replace the set of loads with a new spare part.
3.3 Partial disassembly and assembly of the chainsaw.

3.3.1. Partially disassemble, assemble and adjust the chainsaw, and also tighten the fasteners and assembly units with the tool attached to each chainsaw, in the following order:
a) remove the sawdust reflector, the saw chain and the bar;
b) remove the filter cover; c) remove the insulator from the candle and turn out the candle;
d) remove the deflector;
d) remove the carburetor from the cylinder;
e) disconnect the muffler;
g) loosen the cylinder mounting screws and carefully remove the cylinder without damaging the gasket between the cylinder and the crankcase. In subsequent work, do not allow sharp blows to the piston skirt and connecting rod so as not to cause nicks, and take measures to protect the crankcase from getting into it soot and foreign objects;
h) remove the piston rings. It is recommended to remove and put on the rings with the help of three or four plates made of brass or copper. If the piston rings are coked with soot in the grooves;
soak their piston in kerosene or gasoline before removing. Carefully scrape soot off the piston and in the cylinder, avoiding scratches and nicks. Thoroughly rinse the cleaned parts in gasoline.

3.3.2. After performing preventive cleaning work, the details of the cylinder group from soot are collected by a chainsaw in the reverse order of disassembly. Especially carefully install the cylinder so as not to break the piston rings. Piston rings should be threaded into the intake cone of the cylinder skirt and slowly put on the cylinder with slight swaying.

^ 4 CURRENT REPAIR

4.1. When the tire is curved, it must be straightened, if uneven working or burrs appear on the guide surfaces — file with an emery wheel to file.
Replace the driven sprocket of the saw unit as follows:
a) drill rivets with a drill with a sharpening angle of 90 0 with a diameter of 5 to 6 mm to countersinks in the side plate of the tire;
b) knock out the rivets and remove the driven sprocket along with the bearing;
c) take a new driven asterisk in the cartridge, remove the cotter pin and washers, open the cartridge. Then, on a flat surface, aligning the radius of the cartridge with the radius of the end of the saw bar, insert the sprocket with the bearing into the groove of the bar, if necessary, spread the plates with a screwdriver;
d) combine the holes in the tire with the holes in the cage, install the rivets and rivet them, while the protrusion of the rivets should not exceed 0.4 mm, and the total thickness of the package not more than 5; 5 mm. 4.2 Remove the flywheel from the crankshaft cone with the ball and puller nut supplied with the tool.

4.3. When replacing the piston, pay attention to the correct arrangement of the piston ring stops. Install the piston on the connecting rod so that the stopper in the groove under the lower piston ring is located on the side facing the friction clutch.

4.4. During the long-term operation of the chainsaw, it may be necessary to clean and rinse the parts, fuel and air channels of the carburetor associated with its disassembly
Dismantling the carburetor should be done in a clean workplace, with a working tool, by a qualified performer. After disassembling, thoroughly clean all parts from dirt and rinse in unleaded gasoline. It is not allowed to clean the nozzles and other calibrated holes with wire, drills and other metal tools, as this can lead to clogging of the channels and the carburetor will not work. These parts must be washed in acetone, alcohol or other solvents, followed by blowing them with compressed air.

4.5. When repairing the starter integrated in the fan cover 13 (Figure 3), it is necessary to start the starter spring by winding seven turns of the starter cord onto the starter drum.

4.6. When replacing a magneto, risk 8 on the basis of 1 should be combined with risk 7 on the crankcase (Figure 6).
5 STORAGE
A chainsaw should be stored indoors or under a canopy.
Storage in the open and in the snow is not allowed.
Before storage, clean the chainsaw from dirt and sawdust. With long-term storage (more than 6 months) a chainsaw
canned as follows
a) lubricate the cylinder and piston with M-8V motor oil GOST 10541-78. Pour oil through a candle hole in an amount of 10 to 15 g; then smoothly turn the crankshaft 3-4 times;
b) into the crankcase, through the suction pipe of the cylinder (removing the carburetor), add from 50 to 60 g of oil and gently rotate the crankshaft three to four times. Put the carburetor in place;
c) lubricate the worm pair of the oil pump with TsIATIM-201 grease GOST 6267-74;
d) grease with a thin layer of preservation oil K-17 GOST 10877-76 all parts of the coupling and put it in place;
e) grease external steel parts (nuts, screws, sprockets, etc.) with a thin layer of preservation oil
K-17 GOST 10877-76.
Preservation is carried out indoors at a temperature not lower than plus 10 ° C and apply heated oils to a temperature of 40 to 60 ° C.
6 TRANSPORTATION
6.1 Transportation of chainsaws in the manufacturer’s packaging should be carried out in closed transport in compliance with the rules for the transport of goods operating on this type of transport
6.2 Storage and transportation of chainsaws in boxes from corrugated cardboard should be carried out in no more than three rows.
6.3. During loading and unloading, transportation, the quality of chainsaws and factory packaging must be maintained.

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