Husqvarna Chain Saw - Manual

English – 5 SYMBOL EXPLANATION Symbols Contact with the tip of the bar can result in thebar being suddenly thrown upwards andbackwards, which can result in serious injury. This saw is only intended forpersons especially trained in treeconservation. See the OperatorGuide! Oil refilling and adjustment...

6 – English TECHNICAL DATA Electrode gap Ignition system Air gap Carburettor type mm/inch mm/inch 336: 0,7/0,028 SEM/CD 0,3/0,01 ZAMA C1Q 334T: 0,7/0,028 SEM/CD 0,3/0,01 ZAMA C1Q 338XPT: 0,7/0,028 SEM/CD 0,3/0,01 ZAMA C1Q 339XP: 0,7/0,028 SEM/CD 0,3/0,01 ZAMA C1Q Bar length Chain speed at Chain pitc...

8 – English TOOLS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

10 – English TROUBLE SHOOTING Starting Idling (low speed) Adjust the L-screw Leaking inlet manifold (rubber) Loose carburettor mounting Loose or faulty fuel pipe Blocked fuel filter Blocked fuel line Tank ventilator blocked Throttle valve axle stiff Throttle sticks Defective throttle return spring B...

English – 11 Trouble shooting methods In addition to faults given in the above schematic, troubleshooting can be carried out on a specific component or specificchain saw system. The different procedures are described inrespective sections and are as follows: 1. Pressure testing the carburettor. See ...

12 – English SERVICE DATA 334T/338XPT Character key The numbers by bolted components representthe tightening torque in Nm. ▲ = Lubricate using two-stroke oil. ■ = Lubricate using engine oil. ● = Lubricate using grease. ❑ = Glued using 2 component adhesive. ❍ = Sealed using silicone. 2-3 15 8-10 8-10...

16 – English SAFETY EQUIPMENT Cleaning and inspection Clean and inspect all parts. The thickness of the brake bandmust not be under 0.8 mm at any point. 2. Remove the circlips (B) and (C) then push/knock out thepins. 3. Remove the handle. 4. Undo the four bolts (D) and remove the cover. Chain brake ...

English – 17 SAFETY EQUIPMENT Assembly Assemble the chain brake as follows: 1. Bolt together the knee joint and brake band. 2. Grease the knee joint’s moving parts and assemble the unitin the cover and knock in the pin (E). B C E D D D D 5. Fit the cover and tighten the four bolts (D). 6. Release th...

18 – English SAFETY EQUIPMENT Chain catcher Dismantle the chain and bar. See the Operator Guide. Checkthe spike (J), does not apply to 333, and the chain catcher (K).Replace any components if damaged. The bolts should betightened to 4 Nm. Assemble the chain and bar. See the Operator Guide. Cleaning ...

English – 19 SAFETY EQUIPMENT Throttle lock and stop function Dismantling, 334T, 338XPT Dismantle the throttle lock as follows: 1. Dismantle the clutch cover and carburettor cover. 2. Knock out the pins (B) and (C) from the left and undo thebolt (D), now pull up the throttle lock (A). Cleaning and i...

English – 23 STARTER WARNING! • The return spring is under tension when in its cassette in the starter and can, with careless handing, fly outand cause personal injury. • Care must be exercised when replacing the recoil spring or the starter cord. Wear protective glasses. Dismantling 1. Undo the fou...

English – 25 IGNITION SYSTEM Dismantling 1. Dismantle the starter (A) and air conductor (B). 2. Remove the spark plug and insert the piston stop (C) in thespark plug hole. See service tools. D E E F H I 8. Dismantle the starter dogs by pressing out the dogs’bearing pins using a suitable punch (ø 3 m...

English – 27 CENTRIFUGAL CLUTCH Dismantling 1. Dismantle the clutch cover. 2. Remove the spark plug and insert the piston stop (A) in thespark plug hole. See service tools. 3. Use a 19 mm spanner and dismantle the clutch hub. NOTE!Left-hand thread. Cleaning and inspection Clean all components and ch...

English – 29 CARBURETTOR Description WARNING!The fuel used in the chain saw has the follow-ing hazardous properties:• The fluid and its vapour are poisonous.• Can cause skin irritation.• Is highly inflammable. The drawings accompanying this description do not correspondwith the carburettor on the ch...

30 – English Operation The carburettor operates differently in the following modes: Cold start mode In the cold start mode the choke valve (D) is fully closed. Thisincreases the vacuum in the carburettor and fuel is easier tosuck from all the diffuser jets (E, F and G). The throttle valve (H)is part...

English – 31 CARBURETTOR 1. 2. 4. 3. Primer pump The primer pump is designed to make it easier to start theengine when cold.The pump fills the carburettor with fuel before an attempt ismade to start. This also prevents bubbles of vapour fromblocking the narrow fuel channels.If the pump does not work...

36 – English Cleaning and inspection of the carburettor WARNING!Fuel has the following hazardous properties:• The fluid and its vapour are poisonous.• Can cause skin irritation.• Is highly inflammable. Clean all units in clean petrol. WARNING!Never direct the compressed air jet towardsthe body. Air ...

English – 37 CARBURETTOR 5. Fit the high speed needle (H) as follows: A. Screw in the new H-needle clockwise until it bottoms. Then anticlockwise 3 1/2 turns. B. Press a new locking cap onto the H-needle to the first stop, i.e. the locking cap should not be fixed. 6. Fit the low speed needle (L) as ...

40 – English Carburettor Your Husqvarna product has been designed and manufacturedaccording to specifications that reduce harmful gases.When you engine has consumed 8-10 tanks of fuel the enginehas been "run-in". To ensure that it runs in the best possibleway and emits as few harmful gases a...

English – 41 TANK UNIT WARNING!The fuel used in the chain saw has the follow-ing hazardous properties:• The fluid and its vapour are poisonous.• Can cause skin irritation.• Is highly inflammable. Dismantling Dismantle the following parts: 1. Bar and chain. See the Operator Guide. 2. Centrifugal clut...

42 – English TANK UNIT Changing the fuel hose and fuel filter 1. Take out the fuel filter with the attached hose with the helpof a hook 502 50 83-01. 2. Pull the hose out through the rubber grommet. 3. Dismantle the rubber grommet. 4. Fit a new rubber grommet on a new hose so that the hoseprotrudes ...

English – 43 TANK UNIT Replacing the tank vent valve, oil tank 334T, 338XPT: 1. Pull out the valve’s rubber fastener using a pair of pliers. 2. Fit a new pin, vyon plug and valve in a new rubber fastener,place the unit in the hole in the tank from the outside. 3. Pull in the valve with fitted vyon p...

44 – English Replacing the impulse hose 1. Pull out the old impulse hose using pliers. 2. Insert the new impulse hose from the carburettor side andcarefully pull it in from the engine side. TANK UNIT

46 – English AV-SYSTEM Assembly 1. Fit the movement limiters on the two front damper elements. 2. Fit the damper element on the tank unit by using a 4 mm allen key. Assemble the following parts: 1. Tank unit. See the chapter "Tank unit". 2. Ignition system and the spark plug. See the chapter...

English – 47 CRANKSHAFT, PISTON AND CYLINDER Dismantling Dismantle the following parts: 1. Bar and chain. See the Operator Guide. 2. Centrifugal clutch. See the chapter "Centrifugal clutch". 3. Muffler. See the chapter "Safety equipment". 4. Carburettor. See the chapter "Carburet...

48 – English Cleaning and inspection Clean all parts, scrape off any sealant from the crankcase andthe cylinder’s contact surfaces. Remove carbon deposits fromthe following areas: 1. The piston crown. 2. Top of the cylinder bore (inside). 3. The cylinder exhaust port. Check the following: 1. That th...

50 – English CRANKSHAFT, PISTON AND CYLINDER 3. Pull off the hose to the impulse channel and seal the nipple. 4. Pump up the pressure to 80 kPa (0.8 bar). 5. Wait 30 seconds. 6. The pressure must not fall below 60 kPa (0.6 bar). 7. Leakage can occur on the crankshaft’s sealing rings. 8. Dismantle th...

English – 51 BAR BOLT Dismantling Dismantle the following parts: 1. Bar and chain. See the Operator Guide. 2. Centrifugal clutch. See the chapter "Centrifugal clutch". 3. Muffler. See the chapter "Safety equipment". 4. Carburettor. See the chapter "Carburettor". 5. Starter. S...

52 – English OIL PUMP Dismantling Dismantle the following parts: 1. Bar and chain. See the Operator Guide. 2. Centrifugal clutch. See the chapter "Centrifugal clutch". 3. Muffler. See the chapter "Safety equipment". 4. Carburettor. See the chapter "Carburettor". 5. Starter. S...