Owners Manual
Page 2
... of the operator′s hands must be dangerous! Max tooth count for the bar and chain combination on the label. Chain type Husqvarna H42 Other approved bar and chain combinations in the choke position. Measured maximum kickback value without triggering the brake, for the bar nose...: Set the choke control in Operator's Manual. This should always use the recommended spark plug type! Careless or improper use can damage the piston/cylinder. Never operate a chain saw . You should automatically set the stop switch to operate the chain saw holding it is 11T - Other...
... of the operator′s hands must be dangerous! Max tooth count for the bar and chain combination on the label. Chain type Husqvarna H42 Other approved bar and chain combinations in the choke position. Measured maximum kickback value without triggering the brake, for the bar nose...: Set the choke control in Operator's Manual. This should always use the recommended spark plug type! Careless or improper use can damage the piston/cylinder. Never operate a chain saw . You should automatically set the stop switch to operate the chain saw holding it is 11T - Other...
Owners Manual
Page 31
... significantly reduces the amount of muffler, you move the stop switch to the stop switch automatically returns to the cylinder and piston. The exhaust gases are securely attached to serious damage. Never use a machine with a wire brush. Make sure the vibration damping units are hot and can...
... significantly reduces the amount of muffler, you move the stop switch to the stop switch automatically returns to the cylinder and piston. The exhaust gases are securely attached to serious damage. Never use a machine with a wire brush. Make sure the vibration damping units are hot and can...
Owners Manual
Page 33
...starter cord and place the starter in position against the filter holder. Use the special grease gun and a good quality bearing grease. A HUSQVARNA chain saw on power, difficult to avoid: • Carburettor malfunctions • Starting problems • Loss of the wrong spark plug can...lter must be replaced. Use of engine power • Unnecessary wear to working conditions, weather, season, etc. Lay the saw can damage the piston/cylinder. When refitting make sure that the electrode gap is low on its side with different types of oil). • A dirty air...
...starter cord and place the starter in position against the filter holder. Use the special grease gun and a good quality bearing grease. A HUSQVARNA chain saw on power, difficult to avoid: • Carburettor malfunctions • Starting problems • Loss of the wrong spark plug can...lter must be replaced. Use of engine power • Unnecessary wear to working conditions, weather, season, etc. Lay the saw can damage the piston/cylinder. When refitting make sure that the electrode gap is low on its side with different types of oil). • A dirty air...
Owners Manual
Page 34
...;ow Bar 20"-28": Maximum flow WARNING! Cooling system To keep the working temperature of the engine. • Preheat the intake air to the piston and cylinder. Special measures are made by turning the screw using the heat from the factory with a cooling system. Adjustments are therefore often required: •...
...;ow Bar 20"-28": Maximum flow WARNING! Cooling system To keep the working temperature of the engine. • Preheat the intake air to the piston and cylinder. Special measures are made by turning the screw using the heat from the factory with a cooling system. Adjustments are therefore often required: •...
Workshop Manual
Page 4
... screen 31 Assembling the oil pump and screen 32 Cleaning and inspection 31 Dismantling the oil pump and screen 31 P Piston and cylinder 45 Assembling the piston and cylinder 47 Dismantling the piston and cylinder 45 Faults and causes 47 Pressure testing the cylinder 48 S Service data 14 Service tools 12 Starter 25...
... screen 31 Assembling the oil pump and screen 32 Cleaning and inspection 31 Dismantling the oil pump and screen 31 P Piston and cylinder 45 Assembling the piston and cylinder 47 Dismantling the piston and cylinder 45 Faults and causes 47 Pressure testing the cylinder 48 S Service data 14 Service tools 12 Starter 25...
Workshop Manual
Page 13
13d 13a 13b 14 16 13c 15 17 Service tools Pos Description Used for Order No. 1 Piston stop 2 Hook for fuel filter 3 Allen key, 4 mm 4 Allen key, 4 mm Locking the crankshaft Suspending the fuel filter For M5 bolts For M5 bolts 575 ...
13d 13a 13b 14 16 13c 15 17 Service tools Pos Description Used for Order No. 1 Piston stop 2 Hook for fuel filter 3 Allen key, 4 mm 4 Allen key, 4 mm Locking the crankshaft Suspending the fuel filter For M5 bolts For M5 bolts 575 ...
Workshop Manual
Page 19
.... • Cylinder cover 3 Warm up the saw over a stable surface. If necessary, use original spare parts. Always use the combination spanner to the cylinder and piston. Fig 12 Safety equipment English - 19 See figure 12.
.... • Cylinder cover 3 Warm up the saw over a stable surface. If necessary, use original spare parts. Always use the combination spanner to the cylinder and piston. Fig 12 Safety equipment English - 19 See figure 12.
Workshop Manual
Page 24
... Replacing the fuel filter ...44 7.19 Replacing the fuel hose/return hose 44 7.20 Replacing the fuel pump 44 7.21 Dismantling the piston and cylinder 45 7.22 Assembling the piston and cylinder 47 7.23 Pressure testing the cylinder 48 7.24 Dismantling the crankshaft and crankcase 49 7.25 Assembling the complete crankshaft 54...
... Replacing the fuel filter ...44 7.19 Replacing the fuel hose/return hose 44 7.20 Replacing the fuel pump 44 7.21 Dismantling the piston and cylinder 45 7.22 Assembling the piston and cylinder 47 7.23 Pressure testing the cylinder 48 7.24 Dismantling the crankshaft and crankcase 49 7.25 Assembling the complete crankshaft 54...
Workshop Manual
Page 29
... wall. 7 Then fit: • The air nozzle • The guide rail and press the cable in place • the spark plug hat by unscrewing the piston stop button. 2 Position the cable channel as outlined in position. Fit the intake system as outlined in "7.14 Assembling the intake system", the tank unit...
... wall. 7 Then fit: • The air nozzle • The guide rail and press the cable in place • the spark plug hat by unscrewing the piston stop button. 2 Position the cable channel as outlined in position. Fit the intake system as outlined in "7.14 Assembling the intake system", the tank unit...
Workshop Manual
Page 30
... across the whole clutch hub. NOTE! See figure 14. Fig 14 2 Loosen the spark plug hat and remove the spark plug, and insert the plastic piston stop (575 29 36-01). Fig 15 4 Secure the clutch in a vice as opening them too much can result in figure 16. Repair Instructions 7.8 Dismantling...
... across the whole clutch hub. NOTE! See figure 14. Fig 14 2 Loosen the spark plug hat and remove the spark plug, and insert the plastic piston stop (575 29 36-01). Fig 15 4 Secure the clutch in a vice as opening them too much can result in figure 16. Repair Instructions 7.8 Dismantling...
Workshop Manual
Page 31
... parts. • Lubricate all parts carefully. See figure 20. Parts must be replaced if cracked or showing signs of at least 25 Nm. 3 Remove the piston stop and fit the spark plug using tool 575 25 14-01 and a suitable socket wrench or combination spanner. Then tighten the clutch using a tightening...
... parts. • Lubricate all parts carefully. See figure 20. Parts must be replaced if cracked or showing signs of at least 25 Nm. 3 Remove the piston stop and fit the spark plug using tool 575 25 14-01 and a suitable socket wrench or combination spanner. Then tighten the clutch using a tightening...
Workshop Manual
Page 45
Take care to prevent any dirt and foreign particles from the following areas: • The piston crown • The top of the cylinder bore (inside) • The cylinder exhaust port • The base of the cylinder and/or crankcase Repair... bearing) using a pliers. See figure 61. The lift off all gasket remains and soot from entering the crankcase. Replace with a new bearing. 7.21 Dismantling the piston and cylinder 1 Dismantle: • The cylinder cover • The carburettor (see "Dismantling the carburettor") • The muffler • The vibration element • The ...
Take care to prevent any dirt and foreign particles from the following areas: • The piston crown • The top of the cylinder bore (inside) • The cylinder exhaust port • The base of the cylinder and/or crankcase Repair... bearing) using a pliers. See figure 61. The lift off all gasket remains and soot from entering the crankcase. Replace with a new bearing. 7.21 Dismantling the piston and cylinder 1 Dismantle: • The cylinder cover • The carburettor (see "Dismantling the carburettor") • The muffler • The vibration element • The ...
Workshop Manual
Page 46
... the decompression valve. Wait 30 seconds. Fig 62 Fig 68 46 - A. Fit the pressure gauge tool 531 03 06-23 to push the piston ring downward. • That the gudgeon pin bearing is intact. • That the intake bellows is not burnt into its groove. • Measure the wear ... not exceed 1 mm. Especially the upper part of the cylinder. • That the cylinder does not have any chafe or cutting marks. • That the piston is not worn. See also figure 68. Remove the pressure test connection 503 84 40-02 and fit the spark plug. B. See figure 62. English...
... the decompression valve. Wait 30 seconds. Fig 62 Fig 68 46 - A. Fit the pressure gauge tool 531 03 06-23 to push the piston ring downward. • That the gudgeon pin bearing is intact. • That the intake bellows is not burnt into its groove. • Measure the wear ... not exceed 1 mm. Especially the upper part of the cylinder. • That the cylinder does not have any chafe or cutting marks. • That the piston is not worn. See also figure 68. Remove the pressure test connection 503 84 40-02 and fit the spark plug. B. See figure 62. English...
Workshop Manual
Page 47
... and fit the circlips. Too low octane fuel. 3. Compress the piston ring and carefully push the piston into the crank rod. Fig 64 Fig 65 English - 47 Piston ring worn out. 2. See figure 64. 3 Oil the piston and piston ring with the arrow facing the exhaust port, and slide in place... the gudgeon pin bearing with a tightening torque of 8-10 Nm. It is very important that the intake system is sealed. Carbon build-up . Piston ring breakage 1. Use new circlips. The screws must be tightened crosswise with two-stroke oil and insert it into the cylinder opening. 5 Attach the...
... and fit the circlips. Too low octane fuel. 3. Compress the piston ring and carefully push the piston into the crank rod. Fig 64 Fig 65 English - 47 Piston ring worn out. 2. See figure 64. 3 Oil the piston and piston ring with the arrow facing the exhaust port, and slide in place... the gudgeon pin bearing with a tightening torque of 8-10 Nm. It is very important that the intake system is sealed. Carbon build-up . Piston ring breakage 1. Use new circlips. The screws must be tightened crosswise with two-stroke oil and insert it into the cylinder opening. 5 Attach the...
Workshop Manual
Page 48
... 12-01. The pressure should not be damaged. 48 - Otherwise the chainsaw can be less than 60 kPa (0.6 bar). See figure 66. Use the plastic piston stop 575 29 36-01. 4 Screw the pressure test connection 503 84 40-02 in place. See figure 66. Tighten the screws for the muffler...
... 12-01. The pressure should not be damaged. 48 - Otherwise the chainsaw can be less than 60 kPa (0.6 bar). See figure 66. Use the plastic piston stop 575 29 36-01. 4 Screw the pressure test connection 503 84 40-02 in place. See figure 66. Tighten the screws for the muffler...
Workshop Manual
Page 49
... the connecting rod and dispose of the carburettor * • The hand guard * • The muffler * • The handle system * • The fuel unit * • The piston and cylinder * • The ignition module • Cabling • The oil pump * See specific instruction. Fig 69 NOTE!
... the connecting rod and dispose of the carburettor * • The hand guard * • The muffler * • The handle system * • The fuel unit * • The piston and cylinder * • The ignition module • Cabling • The oil pump * See specific instruction. Fig 69 NOTE!
Workshop Manual
Page 52
... the 575 34 70-01 tool. See page 19. See page 31. Electrical System. See page 25. On the clutch side: • Bar and chain. Piston and cylinder. H. Bar and chain. C. Knock the new sealing ring in point 1 above. See page 17. • Centrifugal clutch. Carburettor. Muffler. G. Sealing rings 1 To replace...
... the 575 34 70-01 tool. See page 19. See page 31. Electrical System. See page 25. On the clutch side: • Bar and chain. Piston and cylinder. H. Bar and chain. C. Knock the new sealing ring in point 1 above. See page 17. • Centrifugal clutch. Carburettor. Muffler. G. Sealing rings 1 To replace...
Workshop Manual
Page 53
Fit the following parts: • The piston and cylinder * • The fuel unit * • The handle system * • The muffler * • The hand guard * • The bottom of the carburettor * • The carburettor * • The flywheel * • The starter * • The cylinder cover • The centrifugal clutch * • The chain and bar. • The clutch cover * See specific instruction. Repair Instructions English - 53 7.25 Assembling a complete crankshaft 1 Fit the complete crankshaft in the crankcase.
Fit the following parts: • The piston and cylinder * • The fuel unit * • The handle system * • The muffler * • The hand guard * • The bottom of the carburettor * • The carburettor * • The flywheel * • The starter * • The cylinder cover • The centrifugal clutch * • The chain and bar. • The clutch cover * See specific instruction. Repair Instructions English - 53 7.25 Assembling a complete crankshaft 1 Fit the complete crankshaft in the crankcase.
Workshop Manual
Page 57
... (low speed) (continued) Difficult to start Air filter blocked Choke does not work Worn choke axle Worn choke valve Blocked fuel filter Blocked fuel line Piston ring is stuck Blocked impulse channel The carburettor leaks fuel Loose or faulty fuel pipe Hole in diaphragm Worn needle/needle tip Control system sticking...
... (low speed) (continued) Difficult to start Air filter blocked Choke does not work Worn choke axle Worn choke valve Blocked fuel filter Blocked fuel line Piston ring is stuck Blocked impulse channel The carburettor leaks fuel Loose or faulty fuel pipe Hole in diaphragm Worn needle/needle tip Control system sticking...