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334T 338XPT
336 339XP
English
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CONTENTS Introduction ....................................................3 Safety instructions ......................................... 4 Symbol explanation ....................................... 5 Technical Data ................................................6 Tools ................................................................8 Trouble shooting .......................................... 10 Service data 334T/338XPT ...........................12 Service data 336/339XP .....................
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INTRODUCTION General Layout This Workshop Manual provides a comprehensive description This Workshop Manual can be used in two different ways: of how to trouble shoot, repair and test the chain saw. A description of different safety measures that should be taken • For the repair of a particular system on the chain saw. during repair work is also given. • For dismantling and assembly of the entire chain saw. Safety Repair of a particular system NOTE! When a particular system on the chain saw is to
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SAFETY REGULATIONS General instructions Special instructions The workshop where chain saw repairs are to be done must be The fuel used in the chain saw has the following hazardous equipped with safety equipment as set out in local provisions. properties: No one may repair the chain saw unless they have read and • The fluid and its vapour are poisonous. understood the content of this Workshop Manual. • Can cause skin irritation. • Is highly inflammable. This Workshop Manual contains the following
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SYMBOL EXPLANATION Symbols WARNING! Chain saws can be dangerous! Inspection and/or maintenance should be Careless or incorrect usage can result in carried out with the engine switched off, serious injury even death to operator or and with the stop switch in the "STOP" others. position. Read through the Operator Guide carefully and understand the content before using the Operating mode chain saw. Always use: • An approved safety helmet Choke, 334T, 338XPT • Approved ear-muffs • Protective glasses
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TECHNICAL DATA Stroke volume Cylinder diameter Stroke length Max. output/speed 3 cm /cubic inch Ø mm/Ø inch mm/inch kW/hp/r/min 336: 35,2/2,1 38/1,5 31/1,22 1,5/2,0/9 600 334T: 35,2/2,1 38/1,5 31/1,22 1,5/2,0/9 600 338XPT: 39,0/2,4 40/1,6 31/1,22 1,7/2,3/9 600 339XP: 39,0/2,4 40/1,6 31/1,22 1,7/2,3/9 600 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
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TECHNICAL DATA Idling speed Engage speed Max. speed Spark plug r/min r/min r/min 336: 2 800 4 100 13 800 Champion RCJ7Y NGK BPMR 7A 334T: 2 800 4 100 13 800 Champion RCJ7Y NGK BPMR 7A 338XPT: 2 800 4 100 13 800 Champion RCJ7Y NGK BPMR 7A 339XP: 2 800 4 100 13 800 Champion RCJ7Y NGK BPMR 7A Volume fuel tank Capacity oil pump Volume oil tank Automatic oil pump 3 Litre/US pint cm /min Litre/US pint 336: 0,36/0,76 3-7 0,20/0,42 Yes 334T: 0,3/0,63 3-7 0,16/0,34 Yes 338XPT: 0,3/0,63 3-7 0,16/0,34 Yes
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TOOLS 12 3 4 56 7 8 9 10 11 12 13 14 15 8 – English
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TOOLS The tools listed here are service tools intended for use on the chain saw in question. In addition to these tools, a standard set of hand tools is required. Pos Description Used for Order No. 1 Piston assembly set Assembling the piston 502 50 70-01 2 Cover plate, inlet Sealing the inlet manifold 502 52 01-01 3 Cover plate exhaust Sealing the exhaust port 502 52 31-01 4 Pressure tester Produce pressure when leakage testing 502 50 38-01 5 Puller Removing bearings from the crankshaft 504 90 9
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TROUBLE SHOOTING Idling (low speed) (continued) Trouble shooting chart Idling with closed L Worn needle/needle tip The different faults that can occur on the chain saw are divided screw into four groups as follows. Within each group possible Leaking diaphragm/cover plate operating faults are listed to the left while the probable fault Control system sticking alternatives are listed to the right. The most likely fault is listed Worn lever arm in the control system first, etc. Faulty diffuser jet
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TROUBLE SHOOTING High speed Acceleration and retardation Will not run at full Adjust H-screw Does not accelerate Adjust the L-screw throttle Blocked air filter Adjust H-screw Tank ventilator blocked Blocked air filter Blocked fuel filter Tank ventilator blocked Blocked fuel line Blocked fuel filter Loose or faulty fuel pipe Blocked fuel line Impulse channel leaking Loose or faulty fuel pipe Blocked impulse channel Blocked impulse channel Cover on the carburettor’s pump side Cover on the carburet
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SERVICE DATA 334T/338XPT 2-3 15 20-26 8-10 8-10 Character key The numbers by bolted components represent the tightening torque in Nm. = Lubricate using two-stroke oil. = Lubricate using engine oil. = Lubricate using grease. ❑ = Glued using 2 component adhesive. ❍ = Sealed using silicone. 12 – English
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SERVICE DATA 334T/338XPT 2,5-4 1-2 2-3 8-10 10-15 * 6-7 2-3 2-3 2,5-4 2,5-4 20-26 English – 13
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SERVICE DATA 336/339XP 15 20-26 10-15 2-3 * 8-10 8-10 8-10 Character key The numbers by bolted components represent the tightening torque in Nm. = Lubricate using two-stroke oil. = Lubricate using engine oil. = Lubricate using grease. ❑ = Glued using 2 component adhesive. ❍ = Sealed using silicone. 14 – English
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SERVICE DATA 336/339XP 2,5-4 6-7 2-3 2-3 2,5-4 2,5-4 20-26 English – 15 STOP
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SAFETY EQUIPMENT Chain brake Dismantling 1. Check that the chain brake is off and dismantle the bolt (A) and the clutch cover. A WARNING! Check that the brake is on. Otherwise the pressure spring can fly out and cause per- sonal injury. 2. Remove the circlips (B) and (C) then push/knock out the pins. D 3. Remove the handle. B 4. Undo the four bolts (D) and remove the cover. C D D D 5. Remove the pressure spring by loosening the rear edge with a screwdriver. 6. Knock out the pin (E) and remove th
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SAFETY EQUIPMENT Assembly Assemble the chain brake as follows: E 1. Bolt together the knee joint and brake band. 2. Grease the knee joint’s moving parts and assemble the unit in the cover and knock in the pin (E). 3. Fit the kickback guard, insert the two pins and fit the circlips (B) and (C). B C 4. Apply the brake and fit the spring. Use a screwdriver to press down the rear edge. 5. Fit the cover and tighten the four bolts (D). D 6. Release the brake and fit the clutch cover on the chain saw.
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SAFETY EQUIPMENT Chain catcher Dismantle the chain and bar. See the Operator Guide. Check the spike (J), does not apply to 333, and the chain catcher (K). Replace any components if damaged. The bolts should be tightened to 4 Nm. Assemble the chain and bar. See the Operator Guide. Muffler WARNING! Do not touch the muffler until it has cooled. Risk for burns. Dismantling Dismantle the muffler as follows: 1. Dismantle the muffler guard by removing the two bolts (A). 2. Turn the saw and undo the thr
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SAFETY EQUIPMENT Throttle lock and stop function A B C Dismantling, 334T, 338XPT D 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 the bolt (D), now pull up the throttle lock (A). 3. Disconnect the choke rod (G) from the carburettor using a small screwdriver and dismantle the choke lever/stop E button. 4. Using long-nose pliers dismantle the lock plate (E). F 5. Disconnect the throttle’s bearing
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SAFETY EQUIPMENT Assembly 334T, 338XPT Assemble the components as follows: 1. Assemble the electrical leads to the lock plate (E) and choke lever/start control (J). J E 2. Slide in the throttle (H). At the same time, fit the throttle rod I (I) on the throttle. Do not hook on the bearing (F) yet. H 3. Using long-nose pliers assemble the lock plate (E). Bolt in position using bolt (D). D 4. Slide up the choke lever/start control (J). E F 5. Fit the pin from the right (C). Now press down the thrott
