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Husqvarna WSC40 Workshop Manual
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Husqvarna WSC40 Workshop Manual

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Workshop Manual
WSC40
English
HUSQVARNA CONSTRUCTION PRODUCTS

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Summary of Contents for Husqvarna WSC40

  • Page 1 Workshop Manual WSC40 English HUSQVARNA CONSTRUCTION PRODUCTS...

  • Page 3: Table Of Contents

    Components – orientation ......11 Dismantling into basic modules ....12 Repair instructions ........20 Troubleshooting ........36 Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.

  • Page 4: Index

    Index 1. INDEX Assemble the saw bar ........16 Bar and chain, replacing ........20 Basic modules ............ 12 Bearing, replacing ..........25 Chain tension ............24 Drive wheel, replacing ........20 Gear box, assembly ..........32 Gear box seating ..........34 Inlet pipe .............
  • Page 5 Index English -...

  • Page 6: Introduction And Safety

    Repair of a specific system Note: The section dealing with safety must be read and understood by all those carrying out repair When a particular system on the WSC40 is to be work or service on the WSC40. repaired, proceed as follows: Warning symbols can be found in this Workshop 1.
  • Page 7 Introduction and safety instructions 2.8. GENERAL INSTRUCTIONS 2.10. SYMBOLS IN THE WORKSHOP MANUAL The workshop where the WSC40 is to be repaired must be equipped with safety equipment in accord- ance with local regulations. This symbol warns of personal No one may repair the WSC40 unless they have...

  • Page 8: Tools And Special Tools

    Tools and special tools 3. TOOLS AND SPECIAL TOOLS Pos. Description Order No. Grease gun 531 11 91-08 Allen key 5mm 582 26 24-01 T-wrench 13mm 582 26 23-01 Pivoting arm cradle 522 90 84-01 Pin wrench C-C 30mm Slide hammer 584 39 99-01 Bearnng puller 523 05 79-01...

  • Page 9: Service Data

    Service data 4. SERVICE DATA Lubricate with two-stroke oil Lubricate with Grease Apply thread lock: Three bond or loctite Tighten torque in Nm English -...
  • Page 10 Service data - English...

  • Page 11: Components - Orientation

    Components - orientation 5. COMPONENTS – ORIENTATION Husqvarna AB, Huskvarna Sweden TYPE WSC 40 SERIAL No. (YEAR WEEK No.) 28 m/s (1200 rpm) SPEED Power: 9,2 kW COMPONENTS ORIENTATION 5.1. COMPONENTS 1. Hose connection, water inlet 20. Diamond chain 2. Angle adjustment screw 21.

  • Page 12: Dismantling Into Basic Modules

    6. DISMANTLING INTO BASIC MODULES BASIC MODULES 6.1. BASIC MODULES This chapter shows how the WSC40 is built up of the basic modules flush guards, saw bar, gear box, and gear box seating. The purpose is to illustrate how you can easily and effectively dismantle and assemble the WSC40 into its basic modules.
  • Page 13 Dismantling into basic modules 6.2. DISMANTLING THE SAW BAR DISMANTLE 1. Turn the saw adaptor upside down to access the centred screw on the back side, that holds the bar in position. Clean the screw head thorouly using a screwdriver. CLEAN THE SCREW HEAD THOROUGLY 2.
  • Page 14 Dismantling into basic modules 4. Place the saw adapter on a solid support with the transmisson cover facing up. 5. Unscrew the protective cover knob and remove the transmission cover. REMOVE THE COVER 6. Clean the two screw holes in the bar plate to facilitate a clean fit of the Allen key to the screw heads.
  • Page 15 Dismantling into basic modules 8. Knock each screw head slightly with a centrer punch and a hammer to facilitate unscrewing. KNOCK THE SCREW HEADS GENTLY WITH A PUNCH 9. Unscrew the screws in the bar plate using an Allen key. Remove the bar plate. UNSCREW THE SCREWS IN THE BAR PLATE 10.
  • Page 16 Dismantling into basic modules 11. Tilt the front end of the bar with one hand, to get a grip on the rear end with the other hand. Remove the bar by lifing it uppwards. 12. Remove the chain. REMOVE THE BAR AND CHAIN ASSEMBLE 13.
  • Page 17 Dismantling into basic modules 16. Tighten the two screws in the bar plate with a tightening torque of 20 Nm. TIGHTEN THE SCREWS WITH APPROPRIATE TORQUE 17. Fit the chain around the bar and the drive wheel. This step can be facilitated by having the chain tension adjustment screw is in its most released position.
  • Page 18 Dismantling into basic modules 20. After tensioning it should still be possible to lift up the chain so the chain guides are parallel to the guide bar and to move the chain easily. A CORRECTLY TENSIONED CHAIN 21. Fit the transmission cover over the drive wheel and bar and tighten the cover knob.
  • Page 19 Dismantling into basic modules 6.3. DISMOUNTING THE GEAR BOX DISMOUNTING 1. Turn the adaptor upside down to access the mounting screw that holds the gear box in position in the gear box seating. 2. Unscrew the mounting screw fully using a T-wrench.

  • Page 20: Repair Instructions

    Repair instructions 7. REPAIR INSTRUCTIONS 7.1. REPLACING THE BAR AND CHAIN 1. Dismantle the bar and chain according to the instructions given in chapter 6.2 step 1 - 12. 2. Replace the worn bar and chain with new ones. 3. Add grease in the centre hole at the tip of the bar to prevent oxidation.
  • Page 21 Repair instructions 4. Knock the head of the centre bolt in the drive wheel slightly with a centre punch and a hammer. KNOCK THE CENTRE BOLT WITH A PUNCH 5. Use an Allen key to unscrew the centre bolt of the drive wheel fully.
  • Page 22 Repair instructions 7.3. REPLACING THE INLET PIPE FOR COOLING WATER 1. Dismantle the gear box from the saw adaptor according to the instructions given in chapter 6.2 and 6.3. 2. Unscrew all M6-screws holding the gear box plate in position, and remove the gear box plate.
  • Page 23 Repair instructions REMOVE THE GEAR BOX ASSEMBLY 4. Replace the inlet pipe with a new one, if needed. Apply yellow Loctite on the threads of the new inlet pipe (A) as sealant. Screw the new inlet pipe by hand into the gearbox. 5.
  • Page 24 Repair instructions 7.4. REPAIRING THE CHAIN TENSION MECHANISM 1. Follow the instructions given in chapter 7.2 step 1-6 and chapter 7.3 step 1 - 3. 2. Use an Allen key to loosen the MC6S screws and remove the chain tensioners. Replace with new ones if needed.
  • Page 25 Repair instructions 4. Tighten the screws in the gear box plate alternately, according to the order given in the picture. NOTE! To prevent oxidation add some Tectyl to the gear box interior before putting the gear box plate back in place NOTE! Lubricate the countersunk area on the screws with grease and tighten the screws with the...
  • Page 26 Repair instructions 3. Turn the gear box upside down to drain the oil of the gear box. NOTE! Collect drained oil in a suitable container. Do not pour out in the zinc or pollute the environ- ment. REMOVE THE OIL PLUG AND DRAIN THE OIL OPEN THE GEAR BOX HOUSING 4.
  • Page 27 Repair instructions 6. To facilitate opening the gear box, flush cold water through the water inlet pipe. FLUSH COLD WATER THROUGH THE WATER INLET PIPE 7. Flush hot water on the outside of the gear box. FLUSH HOT WATER ON THE OUTSIDE OF THE GEAR BOX 8.
  • Page 28 Repair instructions 9. The open gear box has all three gears positioned in the bottom part of the gear box housing. THE POSITION OF THE GEARS AND BEARINGS RELEASE THE GEARS AND REPLACE THE BEARINGS 10. Remove the O-ring gaskets. NOTE! Always replace the O-ring gaskets with new ones before assembly.
  • Page 29 Repair instructions 12. Use a universal puller of appropriate size to release the largest gear with bearing (marked B in the figure of step 9) from the gear box. REMOVE THE LARGE GEAR AND ITS BEARING 13. Use a hydraulic press tool to remove the bearing from the large gear (marked B in the figure of step 9).
  • Page 30 Repair instructions 15. Apply a M12 screw to the centre of the gear and tighten. Use a universal puller to remove the bearing from the released, middle sized gear as outlined in the picture to the right. REMOVE THE BEARING OF THE MIDDLE SIZED GEAR 16.
  • Page 31 Repair instructions 18. Install the new bearing in the large gear wheel (marked B in the figure of step 9) by using a hydraulic press. NOTE! Use a pressing cylinder (A) of the same diameter as the outside diameter of the bearing.
  • Page 32 Repair instructions INSTALL THE GEARS INTO THE GEAR BOX HOUSING 20. Put the gears with new bearings back into the gear box housing. Follow the order outlined in the picture and described below: 21. Start with the middle sized gear with new bear- ings (A).
  • Page 33 Repair instructions 26. Put the lid and the bottom part of the gear box housing together. Ensure that the three shafts and the two “pins” fit properly. See the picture to the right. FIT THE THREE SHAFTS AND TWO PINS PROPERLY 27.
  • Page 34 Repair instructions 7.6. REPLACING THE OUTER SIDES OF THE GEAR BOX SEATING 1. Dismantle the saw adaptor according to the instructions given in chapter 6.2 - 6.4. 2. Unscrew the attachment screws holding the two outer sides of the gear box seating. 3.
  • Page 35 Repair instructions English -...

  • Page 36: Troubleshooting

    Troubleshooting 8. TROUBLESHOOTING 8.1. WEAR ON THE BAR If there are marks which indicate that the guide bar has been heated, as illustrated below, the following causes are usually the reason behind it. Problem Probable cause Potential solution The operator has hit a reinforcing bar with Replace the guide bar with a new Image A the long side of the bar.
  • Page 37 Troubleshooting 8.2. TROUBLESHOOTING SCHEDULE WARNING! If service operations or troubleshooting does not require the machine to be on, the engine should be switched off, and the stop switch in STOP position. Problem Probable cause Potential Solution The machine works heavily or Wear on chain or bar.
  • Page 38 2017W11...