Husqvarna 371XP Workshop Manual
  1. Manuals
  2. Brands
  3. Husqvarna Manuals
  4. Chainsaw
  5. 371XP
  6. Workshop manual
Husqvarna 371XP Workshop Manual

Husqvarna 371XP Workshop Manual

Hide thumbs Also See for 371XP:
Table of Contents

Advertisement

Quick Links

For Husqvarna Parts Call 606-678-9623 or 606-561-4983
371XP/XPG
Workshop manual
101 88 25-26
www.mymowerparts.com

Advertisement

Table of Contents
loading

Related Manuals for Husqvarna 371XP

Summary of Contents for Husqvarna 371XP

  • Page 1 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 371XP/XPG Workshop manual 101 88 25-26 www.mymowerparts.com...

  • Page 2: Table Of Contents

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CONTENTS Introduction ..........1 Safety regulations ........2 Symbols ............3 Technical information ......... 4 Service tools ..........6 Trouble shooting ......... 8 Service information ........10 Safety equipment ........12 Recoil starter ..........16 Electrical system ........

  • Page 3: Introduction

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 INTRODUCTION Arrangement General This manual provides a detailed description of procedures This workshop manual can be used in two different ways: for trouble shooting, repair and testing of the chainsaw. The safety precautions that should be taken during repair work •...

  • Page 4: Safety Regulations

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SAFETY REGULATIONS Special instructions General instructions The fuel used in the chainsaw poses the following hazards: Workshops where chainsaws are serviced must be equipped 1. The fluid and its fumes are poisonous. with safety equipment in accordance with local regulations.

  • Page 5: Symbols

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SYMBOLS Symbols on the saw Symbols in this manual The markings shown below are moulded into the chainsaw casing. This symbol indicates a risk of personal injury if instructions are not followed. Choke...

  • Page 6: Technical Information

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TECHNICAL INFORMATION Displacement Bore Stroke Max. power/rpm / cubic inch mm/inches kW/hp/rpm 70.7/4,3 50/1.97 36/1.42 3.9/5.3/9600 4.0/5.4/9600 (US version only) Sparkplug gap Ignition system Air gap Carburettor type mm/inches FHP/CD mm/inches Walbro 0.5/0.02 0.3/0.01...
  • Page 7 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TECHNICAL INFORMATION Idling speed Engagement speed Max. overspeed Spark plug Champion 2700 3500 13.500 RCJ 7Y Fuel tank volume Oil pump capacity Fuel tank volume Automatic oil pump Litres/US pints /min Litres/US pints 0.77/1.63...
  • Page 8 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SERVICE TOOLS 6 – English www.mymowerparts.com...

  • Page 9: Service Tools

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SERVICE TOOLS Item Name Usage Ordering No. The tools listed here are the Piston stop Locking the crankshaft 502 50 33-01 service tools required for this Cover plate: crankcase inlet Sealing off inlet 502 54 05-01 model of chainsaw.
  • Page 10 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TROUBLE SHOOTING Trouble shooting schematic Faults that can develop on the chainsaw are divided into four groups as follows. In each category, possible malfunctions are shown on the left, with a list of possible faults on the right.

  • Page 11: Trouble Shooting

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TROUBLE SHOOTING High rpm Acceleration and retardation Adjust H-screw Does not accelerate Will not run at full Adjust H-screw Blocked air filter Adjust L-screw throttle Blocked air filter Blocked fuel tank ventilator Blocked fuel tank ventilator...
  • Page 12 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SERVICE INFORMATION Key to diagrams Figures next to components which are attached using bolts give the appropriate tightening torques in Nm. = Lubricate with two-stroke oil. = Lubricate with (chainsaw) chain oil. = Lubricate with grease.

  • Page 13: Service Information

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SERVICE INFORMATION English – 11 www.mymowerparts.com...
  • Page 14 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SAFETY EQUIPMENT Chain brake Dismantling 1. First remove the following components: • Chain and guide bar. See instruction book. • Centrifugal clutch. See page 22. 2. Push the hand guard forward so that the chain brake is on.

  • Page 15: Safety Equipment

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SAFETY EQUIPMENT Inspection Clean and inspect all components. The brake-strap thickness must not be less than 0.8 mm at any point. See fig. 5. Reassembly Assemble the chain brake as follows: min. 0.8 mm 1.
  • Page 16 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SAFETY EQUIPMENT Chain catcher Remove the chain and guide bar. See instruction book. Inspect the chain catcher and replace it if it is damaged. Tighten the retaining bolts to 6 Nm. See fig. 8.
  • Page 17 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 SAFETY EQUIPMENT Throttle lock Dismantling 1. Remove the tank unit from the motor unit. See page 34. WARNING! The fuel that is used in the chainsaw poses the following hazards: 1. The fluid and its fumes are poisonous.
  • Page 18 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 RECOIL STARTER Starter assembly Dismantling 1. Undo the four bolts that fasten the starter assembly to the crankcase and remove it. See fig. 1. 2. Pull out the handle 20-30 cm and lift out the cord from the slot in the cord pulley.
  • Page 19 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 RECOIL STARTER Reassembly WARNING! Make sure that the recoil spring does not fly up and cause personal injury. 1. If a new recoil spring is to be used, place the new spring, with retaining wire, such that the end loop of the spring is over the peg (A) on the cord pulley.
  • Page 20 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEM Ignition system Dismantling 1. Remove the cylinder cover and starter assembly. See page 16. 2. Release the blue lead (A) (which connects to the stop switch) from the ignition module (B). See fig. 1.
  • Page 21 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEM Reassembly Assemble the ignition system as follows: 1. Locate the flywheel on the crankshaft. Turn it gently until the key on the flywheel mates with the recess in the shaft. 2. Fit the flywheel washer and nut. Tighten the nut to 35 Nm.
  • Page 22 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEM Hand grip heater Some chainsaws are equipped with hand grip heating. The hand grip heater comprises the following components. • Generator • On/off switch • Heating element in the rear hand grip (tank unit).

  • Page 23: Recoil Starter

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEM Replacing the generator 1. Before the generator can be replaced, the following components must be removed: A. Recoil starter. See page 16. B. Flywheel. See page 18. C. Silencer. See page 14.

  • Page 24: Centrifugal Clutch

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CENTRIFUGAL CLUTCH Centrifugal clutch Dismantling During dismantling of the centrifugal clutch, the chain brake must be in the off position. 1. Remove the cylinder cover, chain and guide bar. See instruction book. 2. Remove the chain guide-plate by removing the bolt (A).
  • Page 25 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CENTRIFUGAL CLUTCH Cleaning and inspection Clean all components and check the following: 1. Lining thickness on the clutch shoes should not be less than 3 mm in the most worn area. See fig. 5. In order to...

  • Page 26: Lubrication System

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 LUBRICATION SYSTEM Lubrication system WARNING! Inadequate lubrication of the chain can result in the chain breaking which can cause serious or life threatening injury. The lubrication system comprises the following components: • Oil pump •...
  • Page 27 15"-18" from fully home, required for different lengths of guide bar. 18"-24" The table applies to Husqvarna chain oil. If another chain oil 24"- is used, the adjuster should be turned one extra turn outward in the first three cases.
  • Page 28 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Carburettor WARNING! The fuel that is used in the chainsaw poses the following hazards: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. Description The diagrams with this description do not show the actual carburettor on the chainsaw.

  • Page 29: Carburettor

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Function The carburettor operates differently in the following operating states: • Cold start • Idling • Part throttle • Full throttle In cold start mode (fig. 4), the choke butterfly (D) is completely closed.
  • Page 30 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Dismantling WARNING! The fuel that is used in the chainsaw poses the following hazards: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable. Removal See fig.
  • Page 31 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Cleaning and inspection 2. There is no play in the throttle and choke butterflies. WARNING! The fuel that is used in the chainsaw 3. The needle valve and its lever arm are not worn at M poses the following hazards: in fig.
  • Page 32 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Reassembly Where no figure is referred to, see exploded diagram 12 on the previous page. Assembly Complete cleanliness is essential when reassembling the carburettor. The smallest dirt particle can cause running problems.
  • Page 33 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Pressure testing Pressure testing should be carried out with the carburettor fully assembled. Testing should always be carried out after the carburettor has been repaired, but can also be performed for trouble shooting before dismantling.
  • Page 34 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Adjustment WARNING! The guide bar, chain and clutch cover must be fitted before the saw is started, otherwise the clutch may come loose causing personal injury. WARNING! Wear ear defenders when making adjustments with the motor running.
  • Page 35 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CARBURETTOR Low speed jet L Find the highest idling speed by slowly turning the L-screw + 1/4 clockwise then anti-clockwise. When the highest speed has been found, turn the L-screw anti-clockwise 1/8 - 1/4 turn.

  • Page 36: Tank Unit

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TANK UNIT Tank unit WARNING! The fuel that is used in the chainsaw poses the following hazards: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable.
  • Page 37 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 TANK UNIT Cleaning and inspection Clean all components and check that the fuel line is undamaged. Reassembly 1. If the chainsaw is equipped with hand grip heating, refit the heating element into the rear hand grip, if it has been removed.

  • Page 38: Anti-Vibration System

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 ANTI-VIBRATION SYSTEM Anti-vibration system WARNING! The fuel that is used in the chainsaw poses the following hazards: 1. The fluid and its fumes are poisonous. 2. Can cause skin irritation. 3. Is highly inflammable.
  • Page 39 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 PISTON AND CYLINDER Piston and cylinder Dismantling 1. Remove the following components: • Cylinder cover. See instruction book. • Spark plug. See instruction book. • Carburettor. See page 28. • Silencer. See page 14.
  • Page 40 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 PISTON AND CYLINDER 2. The cylinder is free of score marks. 3. The piston is free of score marks. Smaller scratches can be polished off with fine emery paper. Max 1 mm 4. The piston ring is not burnt into its groove.
  • Page 41 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 PISTON AND CYLINDER Reassembly Carry out assembly of the piston and cylinder as follows: NOTE! Ensure that no dirt or other foreign particles fall into the crankcase. 1. Oil in the needle roller bearing and fit it in the connecting rod little end.

  • Page 42: Piston And Cylinder

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 PISTON AND CYLINDER Pressure testing In order to carry out pressure testing on the crankcase and cylinder, the following components should be removed: • Carburettor. See page 28. • Silencer. See page 14.

  • Page 43: Crankcase And Crankshaft

    For Husqvarna Parts Call 606-678-9623 or 606-561-4983 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) • Guide bar bolts (describes only replacement of the...
  • Page 44 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CRANKCASE AND CRANKSHAFT 8. If required, remove the crankshaft bearings from the crankcase. Proceed as follows: WARNING! The crankcase halves are hot. Risk for burns. Use protective gloves. A. Remove the rubber stop (A). See fig. 5.
  • Page 45 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CRANKCASE AND CRANKSHAFT Reassembly Reassemble the crankcase and crankshaft as follows: WARNING! The crankcase halves are hot. Risk for burns. Use protective gloves. 1. If bearings are to be fitted, proceed as follows: A.
  • Page 46 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CRANKCASE AND CRANKSHAFT 4. Locate the guide pegs in the clutch side crankcase half, grease and locate the gasket. See fig. 12. NOTE! Continuing to pull with the assembly tool after the gasket is clamped will damage the crankshaft.
  • Page 47 For Husqvarna Parts Call 606-678-9623 or 606-561-4983 CRANKCASE AND CRANKSHAFT Crankcase seals 1. To replace the crankcase seals, first remove the following components: On the flywheel side: • Recoil starter. See page 16. • Flywheel. See page 18. • Generator if fitted. See page 21.

This manual is also suitable for:

371xpg

Table of Contents