Husqvarna 570 Workshop Manual
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Husqvarna 570 Workshop Manual

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Workshop manual
570 575XP
English

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Summary of Contents for Husqvarna 570

  • Page 1 Workshop manual 570 575XP English...

  • Page 2: Table Of Contents

    CONTENTS Introduction ..........3 Safety regulations ........4 Symbols ............5 Technical data ..........6 Service tools ..........8 Service data ..........10 Safety equipment........12 Starter ............18 Electrical system ........20 Centrifugal clutch ........26 Lubrication system ........28 Carburettor ..........

  • Page 3: Introduction

    Workshop Manual. Usage is evident Numbering from respective sections. Position references to components inside the figures are Always use Husqvarna original parts: designated A, and B, etc. The figures are number 1, 2 etc. •...

  • Page 4: Safety Regulations

    SAFETY REGULATIONS General instructions Special instructions The workshop where chainsaw repairs are to be done The fuel used in the chainsaw has the following hazardous must be equipped with safety equipment as set out in properties: local regulations. 1. The fluid and its fumes are poisonous. 2.

  • Page 5: Symbols

    SYMBOLS Symbols on the chainsaw Symbols in this Workshop Manual The following symbols are moulded into the chainsaw casing. This symbol indicates a risk of personal injury if instructions are not followed. Choke Switch for hand grip heater Fuel filler Stop button Screw to adjust chain lubrication Chain oil filler...

  • Page 6: Technical Data

    TECHNICAL DATA Displacement Bore Stroke Max. power/rpm / cubic inch Ømm/Øinch mm/inch kW/hp/ rpm 67,9 cm /4.1 49 mm/1,9" 36/1,4 3,6/4,9, 9600 rpm 575XP 73,5 cm /4.5 51 mm/2,0" 36/1,4 4,0/5,5, 9600 rpm Spark plug gap Ignition system Air gap Carburettor type mm/inch mm/inch...
  • Page 7 TECHNICAL DATA Idling speed Engage speed Max. speed Spark plug 2 700 3600 13600 NGK BPMR7A Champion RCJ 7Y 575XP 2 700 3600 13600 NGK BPMR7A Champion RCJ 7Y Fuel tank volume Oil pump capacity Oil tank volume Automatic oil pump Litres/US pint /min Litres/US pint...

  • Page 8: Service Tools

    SERVICE TOOLS 8 – English...
  • Page 9 SERVICE TOOLS Item Description Used for Order No. The tools listed here are service tools intended for use on the Piston stop Locking the crankshaft 504 91 06-05 chainsaw in question. In addition Cover plate, exhaust Sealing the exhaust port 502 54 11-02 to these tools, a standard set of Cover plates, inlet kit...

  • Page 10: Service Data

    SERVICE DATA 8.5Nm 1.5Nm 20Nm 19mm 1.5Nm 3.5Nm 13Nm 13mm 15Nm 5.5Nm 20Nm 11Nm 4.5Nm 15Nm 13mm 20Nm Key to diagrams The figures next to parts screwed on indicate the tightening torque Nm. = Lubricate with two-stroke oil. = Lubricate with chain oil. = Lubricate with grease.
  • Page 11 SERVICE DATA 4.5Nm 14Nm 11Nm 23Nm 13mm 2.5Nm English – 11...

  • Page 12: Safety Equipment

    SAFETY EQUIPMENT Chain brake Dismantling 1. Dismantle the following parts first: • Chain and bar. See the Operator's Manual. 2. Push the hand guard forward so that the chain brake is on. See fig. 1. 3. Remove the chain guide-plate (A). See fig. 1. Fig.
  • Page 13 SAFETY EQUIPMENT Assembly Assemble the chain brake as follows: 1. Fit the toggle joint and brake band. 2. Grease the moving parts of the toggle joint (D) and fit the unit on the chain saw. See fig. 6. WARNING! Ensure that the spring does not fly out Fig.
  • Page 14 SAFETY EQUIPMENT Function check WARNING! After repair, the chain brake must be checked according to the following instructions. For this test, the engine must not be running. Check that the chain brake cuts in as follows: 1. Hold the chain saw over a stable surface as shown in fig.
  • Page 15 SAFETY EQUIPMENT Muffler WARNING! Do not touch the muffler until it has cooled. Risk of burn injuries. Dismantling 1. Remove the two lower M5 bolts and the mufflerʼs two M6 bolts. See fig. 12. 2. Remove the gasket and cooling plate. See fig. 12. 3.
  • Page 16 SAFETY EQUIPMENT Throttle lock Lower the rear of the tank by removing the screws A, B and C. See fig. 15. Fig. 15 Remove the screw A on hand grip insert. See fig. 16. Fig. 16 Remove the handle insert (A). Remove the guide pin for the throttle (B) and throttle lock (C) using a punch.
  • Page 17 SAFETY EQUIPMENT Remove the throttle cable and lever. See fig. 19 Inspection Clean all components and check the following: 1. That the throttle cable and lever are undamaged and run easily. 2. That the lock activation mechanism is not worn. See fig.

  • Page 18: Starter

    STARTER Starter Dismantling WARNING! If the spring is tensioned on the starter pulley it can fly up and cause personal injury. Wear protective glasses. 1. Remove the four bolts holding the starter to the crankcase and remove the starter. See fig. 1. Fig.
  • Page 19 STARTER Assembly WARNING! If the spring is tensioned on the starter pulley it can fly up and cause personal injury. Wear protective glasses. 1. If a new spring is to fitted, place the new spring with cassette so that the end loop comes over the peg. Fit the spring cassetteʼs 2 screws.

  • Page 20: Electrical System

    ELECTRICAL SYSTEM Ignition system Dismantling 1. Remove the cylinder cover and starter unit. See page 18. 2. Release the lead (A) (which connects to the stop button) from the ignition module (B). See fig. 1. 3. Remove the ignition cable (C) from the spark plug and release both cables from the cable guide, and lift off the cable guide.
  • Page 21 ELECTRICAL SYSTEM Assembly 7. Insert the feeler gauge ”Air Gap Tool” (0.3 mm) between the ignition module and the flywheel Assemble the ignition system as follows: magnet. The clearance only applies to the two lower pegs on the ignition module. See fig. 8. 1.
  • Page 22 ELECTRICAL SYSTEM Hand grips and carburettor heater, 575XPG Some chainsaws are fitted with hand grip heaters and carburettor heaters, and consist of the following parts: • Generator. • Switch. • Heating element in rear hand grip. • Front hand grip with heating element. •...
  • Page 23 ELECTRICAL SYSTEM Replacing the generator 1. The following components must be removed before the generator can be replaced: A. Starter. See page 18. B. Flywheel. See page 20. 2. Remove the bolt for the rear damper element (D) and upper AV spring (B). Remove the bolt on the front AV element (D).
  • Page 24 ELECTRICAL SYSTEM Dismantle the cables (A) and (B) on the heater switch. Loosen connection (C). See fig. 14. Fig. 14 Loosen the cable fastening on the tank. See fig. 15. Fig. 15 Dismantle the screws (A) on the generator. fig. 16. Replacing the switch 1.
  • Page 25 ELECTRICAL SYSTEM Replacing the front hand grip 1. Dismantle the earth cable. See fig. 18. Fig. 18 2. Remove the five bolts (A, B and C) which hold the front hand grip. See fig. 19. 3. Fit the new front hand grip by screwing in the five bolts (A, B and C).

  • Page 26: Centrifugal Clutch

    CENTRIFUGAL CLUTCH Centrifugal clutch Dismantling When dismantling the centrifugal clutch the chain brake must be in the off position. 1. Remove the cylinder cover, chain and bar. See Operator's Manual. 2. Remove the chain guide plate by unscrewing the bolt (A). See fig. 1. Fig.
  • Page 27 CENTRIFUGAL CLUTCH Cleaning and inspection Clean all components and check the following: 1. The lining thickness on the clutch shoes must not be min 3.5 mm less than 3.5 mm at the most worn point. See fig. 5. 2. There should be no play between the clutch shoes and the clutch hub.

  • Page 28: Lubrication System

    LUBRICATION SYSTEM Lubrication system WARNING! Insufficient lubrication of the chain can result in the chain breaking, which can cause serious or even life-threatening injury. The lubrication system consists of the following parts: • Oil pump. • Suction pipe with filter. •...
  • Page 29 LUBRICATION SYSTEM Cleaning and inspection Clean all parts, including the pump and oil pipe mounts in the crankcase, and check the following: 1. The taper on the adjuster screw (F) should not have any wear marks. See fig. 4. 2. The eccentric face on the pump piston (I) should not have any wear marks.

  • Page 30: Carburettor

    CARBURETTOR Carburettor WARNING! The fuel used in the chainsaw has the following hazardous properties: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. Description The drawings accompanying this description do not correspond with the carburettor on the chainsaw. They only show the principle for the design and function.
  • Page 31 CARBURETTOR Function The carburettor operates differently in the following modes: • Cold start mode • Idling mode • Part throttle mode • Full throttle mode In the cold start mode (fig. 4) the choke valve (H) is fully closed. This increases the vacuum in the carburettor so that fuel is sucked more easily from all the diffuser jets (D, E and F).
  • Page 32 CARBURETTOR Dismantling WARNING! The fuel used in the chainsaw has the following hazardous properties: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. 1. Remove the cylinder cover and air filter. 2. Remove the carburettor control (D) by pulling. Disconnect switch wires (E and F).
  • Page 33 CARBURETTOR Carburettor 8. Remove the cover (A) over the metering unit and carefully remove the metering diaphragm (B) and gasket. See fig. 10. 9. Remove the screw (E) and take out the needle valve (D) with lever (C), spindle and spring. See fig. 10. Fig.
  • Page 34 CARBURETTOR Cleaning and inspection 5. The tips of the high and low speed screws are not damaged. WARNING! 6. The intake manifold is undamaged. See page 44. Fuel has the following hazardous proper- The carburettor has an extra air shutter connected in ties: parallel with the ordinary throttle valve.
  • Page 35 CARBURETTOR Assembly Where no figure is referred to, see fig. 12 on the previous page. Maintain a high level of cleanliness when assembling the carburettor. The slightest contamination can result in running problems. 1. If the throttle and choke valves, together with levers and springs were removed, they should be refitted.
  • Page 36 CARBURETTOR 7. Fit the control diaphragm (B) with gasket and cover (A) on the metering unit. See fig. 17. Fit the axle on the air shutter (L) and connect the throttle actuator rod (N) in parallel with the ordinary throttle valve. The valve housing (P) is secured in the carburettor using two screws.
  • Page 37 CARBURETTOR Refitting to the chainsaw See fig. 20 and 21. 1. Mount the filterholder with carburettor and choke system. Connect the rear rubber mounts (H). Check that the choke is fitted in the right position in the partition. See page 47, fig. 15. 2.
  • Page 38 CARBURETTOR Basic adjustment for EPA II saws with speed limited ignition systems and capped carburettors The models 575XP and 570 are equipped with speed limited ignition systems and capped carburettors. A slightly different adjustment procedure is necessary when replacing the carburettor or needles on these models.
  • Page 39 CARBURETTOR 5. Let the engine run at ”B” rpm ~ 1 minute, until warm. 6. Close the H-needle further ”C” turn on a scale to get correct setting. Model C = 1/4 575XP C = 3/4 Tachometer Due to the integrated speed limitation in the ignition system most tachometers will not indicate a speed above the value that the speed limitation is set to.

  • Page 40: Tank Unit

    TANK UNIT Tank unit WARNING! The fuel used in the chainsaw has the following hazardous properties: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. Dismantling 1. Drain off the fuel from the tank. 2.
  • Page 41 TANK UNIT Cleaning and inspection Clean all parts and check that the fuel pipe is intact. Assembly 1. If the chainsaw is fitted with hand grip heating, fit the heating element if it has been removed. See page and 24. NOTE! Take care not to damage the fuel pipe and throttle cable.

  • Page 42: Anti-Vibration System

    ANTI-VIBRATION SYSTEM Anti-vibration system WARNING! The fuel used in the chainsaw has the following hazardous properties: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. Dismantling 1. Dismantle the following parts: • Chain and bar.

  • Page 43: Piston And Cylinder

    PISTON and CYLINDER Piston and Cylinder Dismantling 1. Dismantle the following parts: • Cylinder cover. • Spark plug. • Carburettor. See page 32. • Muffler. See page 15. Fig. 1 2. Unscrew the anti-vibration spring (C) from the cylinder. See fig. 1. 3.
  • Page 44 PISTON and CYLINDER Check the following: 1. That the cylinderʼs surface coating is not worn. Especially in the upper part of the cylinder. 2. That the cylinder is free of score marks. See fig. 5. 3. That the piston is free of score marks. Minor scratches can be polished off with fine emery paper.
  • Page 45 PISTON and CYLINDER Faults and causes Score marks in the piston, fig. 8 (A) 1. Incorrect carburettor setting. Too high maxspeed. 2. Too low octane fuel. 3. Too little, or incorrect oil in the fuel. Carbon build-up, fig. 8 (B) 1.
  • Page 46 PISTON and CYLINDER 8. Guide up the cylinder base gasket with the four bolts (A) and tighten them alternately. Tighten them finally to 10 Nm. See fig. 12. 9. Fit the anti-vibration spring (C) on the cylinder. See fig. 12. Tighten the bolt to 10 Nm. 10.Pressure test as shown in page 36.
  • Page 47 PISTON and CYLINDER 11. Fit the filterholder with choke on carburettor. Use long screws (L) on the upper part and short screws (M) on lower part. See fig. 14. 12. Fit carburettor with filter holder on manifold. • Fit choke shaft (P) in notch. •...
  • Page 48 PISTON and CYLINDER Pressure testing The following parts must be removed to pressure test the crankcase and cylinder: • Air filter and carburettor. See page 32. Carry out pressure testing as follows: 1. Fit both cover plate 502 52 48-01 with bolt on the intake manifold.

  • Page 49: Crankcase And Crankshaft

    CRANKCASE and CRANKSHAFT This section deals with the following: • Crankcase and crankshaft (describes how the whole assembly is dismantled and reassembled) • Seals (describes only replacement of seals) • Bar bolts (describes only replacement of bar bolts) Crankcase and crankshaft Dismantling 1.
  • Page 50 CRANKCASE and CRANKSHAFT 8. If the crankshaft bearing should remain on the crankshaft remove it with puller 504 90 90-01. See fig. 6. 9. If necessary, remove the following parts: A Spike bumper. B. Rubber stop (A). See fig. 5. Fig.
  • Page 51 CRANKCASE and CRANKSHAFT Assembly Fit the crankcase and crankshaft as follows: WARNING! The crankcase halves are hot and can cause burn injuries. Wear protective gloves. 1. If bearings are to be fitted, do as follows: A. Heat the relevant crankcase half to 200°C. B.
  • Page 52 CRANKCASE and CRANKSHAFT 5. Use tool 502 50 30-20. Turn around the sleeve (B) and pull on the flywheel sideʼs crankcase half. Pull until the gasket is clamped between the crankcase halves. See fig. 12. 6. Fit the six bolts. Tighten them alternately. Tighten them finally to 8 Nm.
  • Page 53 CRANKCASE and CRANKSHAFT Seals 1. To replace the seals on the crank shaft, remove the following parts first: On the flywheel side: • Starter. See page 18. • Flywheel. See page 20. • Generator, where appropriate. See page 24. On the clutch side: •...
  • Page 54 CRANKCASE and CRANKSHAFT 114 02 91-26 56 – English 2004W44...

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