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Husqvarna 324L Workshop Manual

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Workshop manual
324L
English
1218 - 001 - 01.07.2019

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  Summary of Contents for Husqvarna 324L

  • Page 1 Workshop manual 324L English 1218 - 001 - 01.07.2019...
  • Page 2: Table Of Contents

    Contents 1 Introduction 1.1 Document description..........3 1.2 Target group............3 1.3 Revisions..............3 1.4 Safety..............3 1.5 Servicing tools............3 2 Safety 2.1 Safety definitions............4 2.2 General safety instructions........4 2.3 Fuel Safety............. 4 2.4 Symbols on the product......... 4 3 Prepare and do servicing on the product 3.1 Maintenance schedule...........
  • Page 3: Introduction

    1.5 Servicing tools The manual gives information about necessary servicing tools. Always use original tools from Husqvarna. 1218 - 001 - 01.07.2019 Introduction - 3...
  • Page 4: Safety

    2 Safety 2.1 Safety definitions • Tighten the fuel cap carefully after you refueled. • Clean the area around the fuel cap. Contamination Warnings, cautions and notes are used to point out in the tank can cause operating problems. specially important parts of the manual. •...
  • Page 5 Noise emissions to the environment according to European Directive 2000/14/EC and New South Wales legislation “Protection of the Environment Operations (Noise Control) Regulation 2017”. Noise emission data can be found on the machine label and in the Technical data chapter. The arrows show the limit for the handle position.
  • Page 6: Prepare And Do Servicing On The Product

    3 Prepare and do servicing on the product 3.1 Maintenance schedule Maintenance Before After 100 After 40 h operation Clean the external surface. After each operation. Clean the muffler, exhaust pipe and engine from leaves, dirt and unwanted lubri- After each operation. cant.
  • Page 7 3.2.1 To assemble the loop handle 5. Remove the ground cable screw (A) and the ground cable (B). 1. Attach the loop handle onto the shaft between the arrows. 2. Move the spacer into the slot of the loop handle. 3.
  • Page 8: Servicing Data

    4 Servicing data 4.1 Servicing data 6 - 8 Nm 6 - 8 Nm 8 - 10 Nm 4 - 6 Nm 10 - 12 Nm 8 - 10 Nm 3.5 - 4.5 Nm 6 - 8 Nm 3 - 4 Nm 4 - 5 Nm 7 - 9 Nm 6 - 8 Nm...
  • Page 9 2 - 3 Nm 3.5 - 4.5 Nm 4 - 6 Nm 3.5 - 4.5 Nm 3.5 - 4.5 Nm 1218 - 001 - 01.07.2019 Servicing data - 9...
  • Page 10 6 - 8 Nm 2 - 3 Nm 6 - 8 Nm 6 - 8 Nm 6 - 8 Nm 0.9 - 1.12 Nm 6 - 8 Nm 2 - 3 Nm 2 - 3 Nm 10 - Servicing data 1218 - 001 - 01.07.2019...
  • Page 11: Servicing Tools

    5 Servicing tools 5.1 Servicing tools 1218 - 001 - 01.07.2019 Servicing tools - 11...
  • Page 12 Item Description: Use: Article number: Hex key, 3 mm To loosen or remove socket head 502 50 19-01 screws. Hex key, 4 mm To loosen or remove socket head 502 50 18-01 screws. Hex key, 5 mm To loosen or remove socket head 502 50 64-01 screws.
  • Page 13: Repair Instructions

    6 Repair instructions 6.1 Product overview for repair instructions 1. Bevel gear 12. Starter 2. Throttle handle 13. Fuel tank 3. Air filter cover 4. Flywheel 6.2 To clean and examine the product parts 5. Clutch assembly • Clean and examine all parts fully. You find more 6.
  • Page 14: Handle And Throttle Trigger

    6.3 Handle and throttle trigger 6.3.1 Product overview of the throttle handle 1. Throttle trigger 6.3.2 To disassemble and assemble the throttle handle 2. Throttle lever 3. Recoil spring 1. Remove the shaft screw (A) and the O-ring (B) on 4.
  • Page 15: Covers

    6.4 Covers 3. Make a note of how the inner parts of the handle are attached. 6.4.1 To remove and install the air filter cover 1. Push the air filter clips. 4. Remove the recoil spring (A). 5. Carefully use your fingers to bend open the throttle lever (B).
  • Page 16: Starter

    6.5 Starter 6.5.2 To disassemble the starter unit WARNING: Use protective glasses. The recoil 6.5.1 To remove and install the starter unit spring can eject from the starter pulley and 1. Remove the 3 screws that hold the starter unit. cause injury.
  • Page 17 4. Remove the screw (A), the starter pawl retainer (B) 5. Carefully put the starter pulley (A) into the starter and the starter pawl (C). housing (B). Make sure that the free end of the recoil spring connects into the dedicated slot in the starter housing.
  • Page 18 12. Put the starter rope into the notch in the starter 4. Use the flywheel puller kit to lock the flywheel. Refer Servicing tools on page 11 . pulley and turn the starter pulley 4 turns counterclockwise. 13. Remove the starter rope from the notch in the starter pulley.
  • Page 19: Air Filter

    3. Let the air filter dry fully. 4. Put the air filter and 1 tablespoon of air filter oil in a 4. Disconnect the throttle cable from the carburetor. plastic bag. Use Husqvarna air filter oil. Refer to To disconnect and connect the throttle Refer to Servicing tools on page 11 .
  • Page 20 5. Remove the 2 nuts (A) and the plate (B). 8. Disconnect the fuel hoses from the carburetor. 9. Install in the opposite sequence. 6.7.2 To disconnect and connect the throttle cable To remove and 1. Remove the air filter cover. Refer to install the air filter cover on page 15 .
  • Page 21 6.7.3 Overview of the carburetor 1. Spring 8. Gasket 2. Gasket 9. Diaphragm 3. Needle valve filter 10. Valve housing 4. Diaphragm 11. Air purge bulb 5. Fuel screen 12. Plate 6. Fuel inlet 7. Needle valve 1218 - 001 - 01.07.2019 Repair instructions - 21...
  • Page 22 6.7.4 To disassemble and assemble the carburetor 7. Remove the 4 screws (C). To remove and 1. Remove the carburetor. Refer to install the carburetor on page 19 . 2. Remove the O-ring from the air intake. Note: These 4 screws hold all the parts of the carburetor together.
  • Page 23 13. Examine the diaphragm gasket and the diaphragm 17. Carefully remove the diaphragm (V) and the for wear and damages. Replace the diaphragm diaphragm gasket (W) from the pump housing (X). gasket and diaphragm if it is necessary. 14. Remove the screw (M). Remove the needle valve lever (N), axle (O), needle valve (P) and spring (Q) from the pump housing (R).
  • Page 24: Muffler

    21. Assemble in the opposite sequence. Make sure that 6.7.6 To adjust the carburetor the needle valve lever (FF) is level with the lower The high speed needle and the low speed needle are surface (GG) of the pump housing. permanently set and cannot be adjusted.
  • Page 25: Ignition System

    6.9.3 To do a spark test CAUTION: Tighten the nuts on the muffler with the correct torque. Tighten the nuts 1. Remove the spark plug from the cylinder. Refer to again when the engine is warm. Use the To remove and install the spark plug on page 25 . Servicing data on correct torque.
  • Page 26 4. Connect a multimeter between point (A) and point 6.9.5 To do a test of the stop switch (B) and measure the resistance. The measured To remove and 1. Remove the stop switch. Refer to value must be 0.75-0.92 Ω. If the measured values install the stop switch on page 15 .
  • Page 27: Centrifugal Clutch

    6.10 Centrifugal clutch 6.10.2 To clean and examine the centrifugal clutch To remove and install 1. Remove the shaft. Refer to 6.10.1 To remove and install the centrifugal clutch the shaft on page 7 . To remove and install 1. Remove the shaft. Refer to 2.
  • Page 28: Flywheel

    4. Remove the 2 screws (A) and the O-rings (B). There 10. Remove the snap ring (A) in the clutch housing. is 1 screw and 1 O-ring on each side of the throttle handle. 11. Apply heat to the clutch housing until it is 5.
  • Page 29: Fuel Tank

    To remove 6.12 Fuel tank 3. Remove the centrifugal clutch. Refer to and install the centrifugal clutch on page 27 . 6.12.1 To do a tank venting test 4. Put the flywheel removal tool (A) around the flywheel 1. Drain the fuel tank. Servicing tools on page to lock the flywheel.
  • Page 30 5. Make sure to put the nozzle (A) into the fuel hose 3. Remove the grommet with the attached fuel hoses (B) fully. and the fuel filter. 6. Make sure that the snap ring (C) is attached correctly. 4. Remove the fuel tank (A). 7.
  • Page 31: Bevel Gear

    6.13 Bevel gear 6.13.1 Overview of the bevel gear 6.13.2 To remove and install the bevel gear 1. Bevel gear housing 2. Grease plug 1. Remove the cutting attachment and the cutting 3. Plate screw attachment guard. 4. Clamp screw 2.
  • Page 32 6.13.3 To disassemble the bevel gear 5. Remove the output axle assembly from the bevel gear housing. 1. Remove the bevel gear from the shaft. Refer to remove and install the bevel gear on page 31 . 2. Remove the snap ring that holds the output axle. 6.
  • Page 33: Engine

    4. Put the output axle assembly into the bevel gear 7. Put the snap ring in position. housing. 8. Lubricate the bevel gear before you operate the To lubricate the bevel gear on product. Refer to page 33 . 5. Put the snap ring in position. 6.13.5 To lubricate the bevel gear 1.
  • Page 34 3. Hold the tachometer against the spark plug cap. 5. Connect a pressure tester to the spark plug hole. Servicing tools on page 11 . Refer to 4. Let the engine run at idle speed to measure the idle speed rpm. Make sure that the idle speed rpm is 6.
  • Page 35 3. Disconnect the ventilation hose (A) from the valve 6.14.6 To do a check of the valve play cover (B). 1. Make sure that the engine is cold. To remove and install 2. Remove the shaft. Refer to the shaft on page 7 . 3.
  • Page 36 5. Turn the flywheel until the mark (A) on the camshaft 3. Turn the 2 rocker arms (A) away from the valve sprocket points up. spring caps (B). 6. Hold the adjustment screw (A) with a hex key (B). 4. Press down the 2 valve spring caps and move them to the side to disconnect the valves.
  • Page 37 6.14.10 To grind the cylinder valves 7. Remove the timing belt (A) from the camshaft sprocket (B) and remove the camshaft sprocket. 1. Disassemble the cylinder valves. Refer to disassemble and assemble the cylinder valves on page 36 . 2. Apply a thin layer of bearing paste on the valve head.
  • Page 38 6.14.13 To install the camshaft sprocket 4. Put the timing belt in position around the camshaft sprocket and install the camshaft sprocket axle. 1. Turn the flywheel (A) until the mark (B) is aligned with the hole (C). This is to make sure that the piston is in its correct position.
  • Page 39 7. Remove the oil hose clips and the oil hose. same direction as before when you assemble the engine. 12. Remove all gasket paste from the contact surfaces on the crankcase and cylinder block. 6.14.17 To remove and install the check valve in the crankcase To disassemble 1.
  • Page 40 6.14.18 To disassemble and assemble the 3. Remove the compression rings (A) and (B) from the piston. crankcase check valve 1. Remove the crankcase check valve. Refer to remove and install the check valve in the crankcase on page 39 . 2.
  • Page 41 7. Assemble in the opposite sequence. 3. Put the timing belt (A) around the timing belt gear (B) on the crankshaft assembly. CAUTION: Make sure that the mark on the piston points at the carburetor side of the engine when you assemble the piston. 6.14.20 To disassemble and assemble the crankshaft assembly To disassemble...
  • Page 42 7. Put the crankcase (A) in position. Note: Screws 5 and 6 are a bit shorter than the other screws. 9. Install the oil hose and the oil hose clips. To remove and install 10. Install the heat guard. Refer to the heat guard on page 34 .
  • Page 43 Standard di- Wear limit mension Cylinder diameter, Ø mm 35.000-35.015 35.100 Play between piston / cylinder, mm 0.010-0.045 0.120 Piston ring width, mm 0.970-0.990 0.920 Piston ring play, mm 0.015-0.056 0.120 Piston ring gap, mm 0.100-0.250 0.600 Piston pin diameter, Ø mm 7.990-8.000 7.950 Piston pin hole diameter in piston, Ø...
  • Page 44: Troubleshooting

    7 Troubleshooting 7.1 Troubleshooting Starting Cause: Action: The engine is not The stop screw for the throttle does not oper- Examine the stop screw for wear and dam- possible to start. ate correctly. age. Replace defective parts. The fuel filter is blocked. Clean the fuel filter.
  • Page 45 Starting Cause: Action: The engine is not The fuel filter is blocked. Clean the fuel filter. Replace the fuel filter if it possible to prime. is necessary. The fuel hose is blocked. Clean the fuel hose. Replace the fuel hose if it is necessary.
  • Page 46 Idle speed (low Cause: Action: speed) The idle speed does The stop screw for the throttle does not oper- Examine the stop screw for wear and dam- not become stable. ate correctly. age. Replace defective parts. The fuel filter is blocked. Clean the fuel filter.
  • Page 47 High speed Cause: Action: The performance at The fuel filter is blocked. Clean the fuel filter. Replace the fuel filter if it high speed is unsatis- is necessary. factory. The fuel hose is blocked. Clean the fuel hose. Replace the fuel hose if it is necessary.
  • Page 48 Increase and de- Cause: Action: crease engine speed The engine speed The fuel filter is blocked. Clean the fuel filter. Replace the fuel filter if it cannot be increased. is necessary. The fuel hose is blocked. Clean the fuel hose. Replace the fuel hose if it is necessary.
  • Page 49: Technical Data

    8 Technical data 8.1 Technical data 324L Engine Cylinder displacement, cm 25.0 Cylinder diameter, Ø mm Cylinder stroke length, mm Idle speed, rpm 2900-3300 Recommended max. speed, rpm 11000 Speed of output shaft, rpm 8300 Max. engine output, according to ISO 8893, kW/hp @ rpm 0.7/0.95 @ 8500...
  • Page 50 50 - Technical data 1218 - 001 - 01.07.2019...
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