Husqvarna 324LX Workshop Manual
Brushcutter, trimmer
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Also See for 324LX:
- Operator's manual (28 pages) ,
- Operator's manual (28 pages) ,
- Operator's manual (32 pages)
Table of Contents
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Table of Contents
Related Manuals for Husqvarna 324LX
Summary of Contents for Husqvarna 324LX
- Page 1 Workshop manual 324LX, 324RX, 324HDA English...
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Page 2: Table Of Contents
Workshop Manual Brushcutter, Trimmer Model 324LX, 324RX, 324HDA Contents General recommendations ______________________ 2 1. Starter ___________________________________ 3 2. Ignition system ____________________________ 7 3. Fuel system _____________________________ 13 4. Centrifugal clutch _________________________ 25 5. Angle gear _______________________________ 29 6. Cylinder block and valve mechanism __________ 33 7. -
Page 3: General Recommendations
Operator’s Manual. The assembly of other equipment or accessories or spare parts not approved by Husqvarna can result in the failure to meet these safety demands and that the person carrying out assembly bears responsibility for this. -
Page 4: Starter
Starter Contents Dismantling ___________________________________ 4 Assembly ____________________________________ 5 Replacing the drive _____________________________ 6... - Page 5 Starter Dismantling Dismantling Loosen the screw holding the cylinder Remove the 3 bolts and lift off the starter. cover. Dismantle the 3 screws holding the starter. Lift off the starter. NOTE! Ensure that the bushing, which guides the starter towards the fuel tank, is not lost.
- Page 6 Starter Assembly Assembly Fit the spring in the starter pulley. If the return spring has, despite all the precautions, flown out or if you intend to fit a new spring proceed as follows: 1. Hook the spring in the starter pulley’s cut-outs.
- Page 7 Starter Tighten the return spring. Tighten the return spring. Check the spring tension. Pull out the starter cord completely and slow the starter pulley with your thumb. Lift the starter cord up out of the cut- out on starter pulley. Then turn the starter pulley anti- clockwise 4 revolutions.
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Page 8: Ignition System
Ignition system Ignition system Contents Checking the spark ___________________________ 8 Replacing the spark plug cap __________________ 10 Dismantling ________________________________ 11 Assembly _________________________________ 12... - Page 9 Ignition system The engine is equipped with an electronic ignition system completely without moving parts. Conse- quently, a faulty component cannot be repaired, but must be replaced by a new component. The spark in an electronic ignition system has a very short burn time and can therefore be interpreted as weak and can be difficult to see while troubleshooting.
- Page 10 Ignition system If there is no spark disconnect the stop If no spark occurs even now, remove switch and test again. the short-circuit cable from the ignition coil. Replace the switch if necessary. If the plug now sparks, the fault is either in the stop switch or the short-circuit cable.
- Page 11 Ignition system Adjust the air gap. Adjust the air gap as needed to the correct value. • Loosen the bolts. • Position the feeler gauge and press the ignition module against the flywheel. • Tighten the bolts and check the air gap again.
- Page 12 Ignition system 3. Attach the ignition coil to the ignition 3. Attach the ignition coil to the ignition cable. cable and ensure that the wire is folded along the cable. 4. Pull the ignition coil into the spark plug cover. NOTE! It is important that the tip of the ignition coil hits the centre of the ignition cable to prevent sparking.
- Page 13 Ignition system Assembly Assembly Check that the key in the flywheel is Clean all components before undamaged and fit the flywheel. assembling. Fit the ignition coil and adjust the air Check that the key in the flywheel is gap. undamaged and fit the flywheel. Fit the centrifugal clutch and remaining Fit the ignition coil.
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Page 14: Fuel System
Fuel system Fuel system Contents Air filter ___________________________________ 14 Tank venting _______________________________ 15 Fuel filter __________________________________ 15 Carburettor ________________________________ 16 Assembly _________________________________ 20 Carburettor settings _________________________ 20 Trouble Shooting Guide ______________________ 21 Throttle ___________________________________ 22... -
Page 15: Air Filter
It can be damaged. Ensure that the filter is dry before refitting it. TIP! Use Husqvarna’s cleaning agent Active Cleaning no. 505 69 85-70. 505 69 85-70 Impregnate the filter with air filter oil. Impregnate the filter with air filter oil. -
Page 16: Tank Venting
Fuel system Tank venting Tank venting Check that the tank venting valve works Tank venting takes place through the correctly. fuel cap and needs to be functional for the engine to work. Replace the fuel cap if the valve is faulty. -
Page 17: Carburettor
Fuel system Carburettor Carburettor Dismantling Dismantling 1. Remove the carburettor cover and Remove the carburettor cover and the the air filter. air filter then blow clean around the carburettor 2. Close the choke valve and blow off any dirt around the carburettor. Dismantle the throttle cable and the nuts holding the carburettor and fold 3. - Page 18 Fuel system Lift up the non-return valve (C) and Carefully lift up non-return valve (C) check that the seals are intact. using your nails. Clean the valve housing. Clean the valve housing and check that the channels are open. Check that the non return valve’s seals (D) are undamaged by carefully squeezing the short sides together.
- Page 19 Fuel system Check the lever arm and needle valve Check the wear to the lever arm partly for wear. by the contact points against the control diaphragm and partly by the cut-outs Replace damaged parts with new parts. for the needle valve. Also check wear to the tip of the needle valve and the groove for the lever arm.
- Page 20 Fuel system Assembling the carburettor Assembling the carburettor Clean and inspect all parts. Clean and inspect all parts. Worn or damaged parts are replaced Worn or damaged parts are replaced with new ones. with new ones. Pay attention to the following when the Pay attention to the following when the carburettor is assembled in the reverse carburettor is assembled in the reverse...
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Page 21: Assembly
Fuel system Assembly Assembly Check that the O-ring is correctly Check that the O-ring is seated seated. correctly on the carburettor before this is fitted on the engine. Connect the fuel hoses, slide the Connect the fuel hoses and ensure that carburettor into place and fit the air they sit correctly. -
Page 22: Trouble Shooting Guide
Fuel system Trouble Shooting Guide Symptom Starting Low speed Acceleration/ Deceleration Probable causes Stop screw for the throttle not working Fuel tank/hose Fuel filter blocked The fuel hose blocked Air in fuel ducts Incorrect/poor fuel Pump diaphragm Vacuum pulse leakage Vacuum pulse duct blocked Loose screw(s) on the pump cover Faulty pump diaphragm... -
Page 23: Throttle
Fuel system Throttle Throttle Pull away the shaft with the throttle Remove both screws (A) (one on each from the clutch cover. side). Remove the throttle from the shaft. Remove the screws (B) and pull away the shaft with the throttle from the clutch cover. - Page 24 Fuel system Assemble the throttle in the reverse order as set out for dismantling. Ensure that the return springs (A) and (B) are positioned using the correct method. Do not forget to fit the locking spring (C). Position the throttle cable and the short-circuit cable in their channels so that they are not pinched when the two throttle halves are screwed together.
- Page 25 Fuel system...
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Page 26: Centrifugal Clutch
Centrifugal clutch Centrifugal clutch Contents Dismantling ________________________________ 26 Assembly _________________________________ 27 Replacing the clutch drum and drive axle ________... - Page 27 Centrifugal clutch The centrifugal clutch has the task of transferring the power from the engine to the cutting equipment’s drive axle. As the name implies, it works according to a centrifugal principle. This means the clutch’s friction shoes are thrown outwards towards the clutch drum at a certain engine speed. When the friction against the drum is sufficiently great it drives the drive shaft at the same speed as the engine.
- Page 28 Centrifugal clutch Assembly Assembly Assemble the clutch and screw it on the Assemble the clutch shoes together flywheel. with the spring and fit the clutch on the flywheel. NOTE! Turn the clutch the right way so it rotates in the same direction as the arrows.
- Page 29 Centrifugal clutch Dismantle the bearing from the clutch Remove the circlip (A) and heat the clutch housing to approximately 110°C housing. using a hot air gun. Knock the clutch housing against a wooden block so that the bearing falls out of the housing. The inner diameter of the clutch drum Check the clutch drum for wear.
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Page 30: Angle Gear
Angle gear Angle gear Contents Dismantling ________________________________ 30 Assembly _________________________________ 31... - Page 31 Angle gear The angle gear has two purposes: The first is to gear down the engine’s high speed to better suit the lower speed a saw blade or trimmer requires to work efficiently. Secondly, the angle gear contributes towards the operator’s working stance so that it is comfortable and at the same time efficient.
- Page 32 Angle gear Dismantle the bearings from the output Dismantle the bearings from the output and input axles. and input axles with the help of a small bearing puller. TIP! Hold the bearing puller in a vice so that it gains a better grip around the bearing.
- Page 33 Angle gear...
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Page 34: Cylinder Block And Valve Mechanism
Cylinder block and valve mechanism Cylinder block and valve mechanism Contents Compression test ___________________________ 34 Check the valve play ________________________ 34 Camshaft gear _____________________________ 35 Dismantling ________________________________ 37 Standard dimensions, wear tolerances __________ 38... -
Page 35: Compression Test
Cylinder block and valve mechanism The cylinder and the piston are two of the components exposed to most strain in the engine. They must withstand, for example, high speeds, large temperature swings and high pressure. Moreover, they must be resistant to wear. Despite these tough working conditions, major piston and cylinder failure is relatively uncommon. -
Page 36: Camshaft Gear
Cylinder block and valve mechanism Check the valve clearance with feeler 5. Loosen the locking nut (B). gauges. 6. Insert the feeler gauge (C) between Adjust if necessary using the adjuster the valve shaft and the adjuster screw. Do not forget to lock the setting screw (D). - Page 37 Cylinder block and valve mechanism WARNING! It is extremely important when assembling the camshaft gear that great care is taken so that valve times are not wrong. This can cause engine failure. Set the marking (A) on the flywheel 1. Turn the flywheel until the mark (A) directly over the centre of the hole (B).
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Page 38: Dismantling
Cylinder block and valve mechanism Dismantling Dismantle the muffler from the cylinder block. Unscrew the spark-arrester (A) and clean with a wire brush. Check the heat guard (B) with regard to crack formation. 505 38 13-08 Empty all the petrol and oil. Empty all the petrol and engine oil. -
Page 39: Standard Dimensions, Wear Tolerances
Cylinder block and valve mechanism Dismantle the crankshaft and the cam Lift up the crankcase and pull the piston belt. out of the cylinder bore. Pull away the sealing rings from the crankshaft . NOTE! Note the cam belt’s direction of rotation (for example, from which direction the text on the belt can be read) so it rotates in the same... -
Page 40: Piston, Crankshaft And Crankcase
Piston, crankshaft and crankcase Piston, crankshaft and crankcase Contents Dismantling ________________________________ 40 Non return valve ____________________________ 41 Piston ____________________________________ 41 Assembly _________________________________ 42... -
Page 41: Dismantling
Piston, crankshaft and crankcase The task of the crankshaft is to transform the reciprocating motion of the piston to rotation. This requires a stable design withstanding immense pressure and rotational and bending strain, as well as high rotational speed. In addition the connecting rod is exposed to large acceleration and retardation forces as it moves between the top and bottom dead centres. -
Page 42: Non Return Valve
Piston, crankshaft and crankcase Non-return valve Non-return valve The non-return valve is a leaf spring There is a spring leaf valve in the valve that controls the oil supply to the bottom of the crankcase that regulates valve mechanism. It is located in the oil discharge to the valve mechanism. -
Page 43: Assembly
Piston, crankshaft and crankcase Assemble the piston on the connecting When the piston is fitted on the rod so that the marking points towards connecting rod it is important that the the carburettor side. marking on top of the piston is turned towards the carburettor side on the cylinder block. - Page 44 Piston, crankshaft and crankcase Fit the oil hose. Fit the oil hose that joins the crankcase and cylinder head. Assemble the remaining parts in the reverse order as set out for dismantling. Turn it so the arrow on the hose points upwards.
- Page 45 Piston, crankshaft and crankcase...
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Page 46: Tools
List of tools Tools Contents Starter __________________________________ 46 Ignition system ___________________________ 46 Fuel system _____________________________ 46 Centrifugal clutch _________________________ 46 Angle gear ______________________________ 46 Cylinder block and valve mechanism __________ 47 Piston, crankshaft and crankcase ____________ 47 Workshop equipment ______________________ 47... - Page 47 List of tools 502 50 18-01 502 50 18-01 502 71 13-01 505 69 85-70 503 97 64-01 502 51 49-01 502 50 06-01 531 00 60-76 531 00 48-70 502 51 34-02 531 03 06-23 502 50 18-01 502 50 83-01 502 50 19-01 505 38 13-08 531 00 48-70...
- Page 48 List of tools 502 51 03-01 502 50 18-01 502 50 18-01 505 38 13-08 504 90 90-01 531 03 06-23 503 26 70-01 502 71 14-01 505 69 85-70 101 64 23-48...
- Page 49 114 02 94-26 2004W26...