Husqvarna WSC 40 Instruction manual

Workshop Manual
English
HUSQVARNA CONSTRUCTION PRODUCTS
WSC40

WORKSHOP MANUAL
CONTENTS
1 Index........................................................... 4
2 Introduction and safety ............................... 6
3 Tools and special tools ............................... 8
4 Service data ............................................... 9
5 Components – orientation ........................ 11
6 Dismantling into basic modules................ 12
7 Repair instructions.................................... 20
8 Troubleshooting ........................................ 36
Contents
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.

4- English
Index
A
Assemble the saw bar ........................................ 16
B
Bar and chain, replacing..................................... 20
Basic modules .................................................... 12
Bearing, replacing .............................................. 25
C
Chain tension...................................................... 24
D
Drive wheel, replacing ........................................ 20
G
Gear box, assembly............................................ 32
Gear box seating ................................................ 34
I
Inlet pipe............................................................. 22
O
Oil ....................................................................... 26
S
Safety ................................................................... 6
Saw bar, dismantling .......................................... 13
Service data ......................................................... 9
T
Tools and special tools ......................................... 8
Troubleshooting .................................................. 36
1. INDEX

English - 5
Index

6- English
Introduction and safety instructions
2. INTRODUCTION AND SAFETY
2.1. GENERAL
This Workshop Manual describes in detail how
to troubleshoot, repair and test the WSC40.
A description of different safety steps that must be
taken during repair work is also given.
2.2. SAFETY
Note: The section dealing with safety must be read
and understood by all those carrying out repair
work or service on the WSC40.
Warning symbols can be found in this Workshop
Manual and on the WSC40. See “Symbols on the
WSC40” and “Symbols in the Workshop Manual”.
A new warning symbol decal must be applied
as soon as possible if a warning symbol on the
product has been damaged or is missing so that
the greatest level of safety can be maintained when
using the WSC40.
2.3. TARGET GROUP
This Workshop Manual is written for personnel who
are assumed to have general knowledge of repair-
ing and servicing the WSC40.
The Workshop Manual must be read and under-
stood by personnel who will carry out repair work
and service on the WSC40. The Manual is also
suitable for use when training new employees.
2.4. MODIFICATIONS
Any modifications to the WSC40 will be gradually
introduced into ongoing production. As these
modifications affect service and/or spare parts,
specific service information will be sent out on
each occasion. This means that in time this
Workshop Manual will become out of date. In order
to prevent this, the Manual should be read together
with all service information concerning the WSC40
in question.
2.5. TOOLS
Special tools are required for some stages. All
service tools are listed in the Workshop Manual.
Usage is made apparent in each section.
Always use Husqvarna’s original:
• Spare parts
• Service tools
• Accessories
2.6. STRUCTURE
This Workshop Manual can be used in two different
ways:
• Repair of a specific system on the WSC40.
• Dismantling and assembly of the entire WSC40.
Repair of a specific system
When a particular system on the WSC40 is to be
repaired, proceed as follows:
1. Look up the page for the system in question.
2. Carry out the following steps:
Dismantling
Cleaning and inspection
Assembly
2.7. NUMBERING
Position references to components inside the
figures are designated A, B, etc.
The figures are numbered 1, 2 etc.
The position references and figure numbers restart
in each new section.

English - 7
Introduction and safety instructions
2.8. GENERAL INSTRUCTIONS
The workshop where the WSC40 is to be repaired
must be equipped with safety equipment in accord-
ance with local regulations.
No one may repair the WSC40 unless they have
read and understood the content of this Workshop
Manual.
This workshop manual contains the following
warning boxes in relevant places.
WARNING!
The warning box warns of the risk
of personal injury if the instructions
are not followed.
NOTE!
This box warns of material damage if the
instructions are not followed.
2.9. SPECIAL INSTRUCTIONS
Use protective gloves and eye protection, goggles
must comply with the ANSI Z87.1 for US or EN166
for EU countries.
When using compressed air, do not direct the jet
towards your body. Air can penetrate into the blood
stream, which can endanger life.
Wear protective earplugs or earmuffs when test
running.
2.10. SYMBOLS IN THE WORKSHOP
MANUAL
This symbol warns of personal
injury when the instructions are
not followed.
Use protective gloves.
Use protective goggles.

8- English
Tools and special tools
3. TOOLS AND SPECIAL TOOLS
Pos. Description Order No.
1 Grease gun 531 11 91-08
2 Allen key 5mm 582 26 24-01
3 T-wrench 13mm 582 26 23-01
4 Pivoting arm cradle 522 90 84-01
5 Pin wrench C-C 30mm
6 Slide hammer 584 39 99-01
7 Bearnng puller 523 05 79-01
8 Universal puller 504 90 90-02
1. 2. 3.
4. 5. 6.
7. 8.

English - 9
Service data
4. SERVICE DATA
Lubricate with two-stroke oil
Lubricate with Grease
Apply thread lock: Three bond or loctite
Tighten torque in Nm
20
20
20
10
10
10
10

10 - English
Service data
10
10
20
24
10
3
5

English - 11
Components - orientation
5. COMPONENTS – ORIENTATION
5.1. COMPONENTS
1. Hose connection, water inlet
2. Angle adjustment screw
3. Parallel handle
4. Locking knob for clamp
5. Guide bar
6. Clamp for wall saw handle
7. Clamping washer
8. Transmisson cover
9. Chain drive sprocket
10. Chain tension adjustment knob
11. Locking clamp
12. Flush cutting guard
13. Spray guard
14. Grease gun
15. Allen key (5 mm)
16. T-wrench, 13 mm
17. Operators manual
18. Storage box
19. Machine marking plate
18
14 15 16
19
17
5
3
10
1
212
12
13
13
8
64
7
9
11
19
24
23
20
21
22
Husqvarna AB, Huskvarna Sweden
TYPE
SERIAL No.
(YEAR WEEK No.)
MAX
SPEED
WSC 40
28 m/s (1200 rpm)
Max
Power: 9,2 kW
COMPONENTS ORIENTATION
20. Diamond chain
21. Gasket
22. Bar plate
23. Nose wheel
24. Warning decal

12 - English
Dismantling into basic modules
6. DISMANTLING INTO 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. Service work on a component
level, for example replacing the saw bar, is de-
scribed in detail in respective chapters.
BASIC MODULES

English - 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.
2. Remove released debris using compressed air.
3. Use a wrench to loosen and remove the screw
completely.
CLEAN THE SCREW HEAD THOROUGLY
REMOVE DEBRIS WITH COMPRESSED AIR
UNSCREW THE CENTRED SCREW ON THE BACK SIDE

14 - English
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.
6. Clean the two screw holes in the bar plate to
facilitate a clean fit of the Allen key to the screw
heads.
7. Remove released debris using compressed air.
REMOVE THE COVER
CLEAN THE SCREW HOLES WITH A SCREWDRIVER
REMOVE DEBRIS WITH COMPRESSED AIR

English - 15
Dismantling into basic modules
8. Knock each screw head slightly with a centrer
punch and a hammer to facilitate unscrewing.
9. Unscrew the screws in the bar plate using an
Allen key. Remove the bar plate.
10. Release the chain tension adjustment screw to
make the chain slack.
KNOCK THE SCREW HEADS GENTLY WITH A PUNCH
UNSCREW THE SCREWS IN THE BAR PLATE
RELEASE THE CHAIN TENSION ADJUSTMENT SCREW

16 - English
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.
ASSEMBLE
13. Wipe all surfaces and make sure they are
clean. Push the bar back in position on the
gear box.
NOTE!
Lubricate the countersunk area on the
screws with grease and tighten the screws
with the appropriate torque to facilitate
future dismantling.
14. On the back side, reinstall the centred screw,
that holds the bar in position, but do not tighten
it until step 18. Lubricate the screw with grease.
15. Put the bar plate back in position.
NOTE!
Lubricate the countersunk area on the screws
with grease and tighten the screws with the
appropriate torque to facilitate future disman-
tling.
REMOVE THE BAR AND CHAIN
CLEAN ALL SURFACES AND PUSH THE BAR BACK
REINSTALL THE CENTRED SCREW ON THE BACK SIDE
REINSTALL THE BAR PLATE

English - 17
Dismantling into basic modules
16. Tighten the two screws in the bar plate with a
tightening torque of 20 Nm.
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.
18. Adjust the chain tension adjustment screw to
the suitable chain tension.
19. Tighten the centred screw on the back side
with a tightening torque of 20 Nm.
TIGHTEN THE SCREWS WITH APPROPRIATE TORQUE
FIT THE CHAIN AROUND THE BAR
ADJUST THE CHAIN TENSION ADJUSTMENT SCREW
TIGHTEN THE CENTRED SCREW ON THE BACK SIDE

18 - English
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.
21. Fit the transmission cover over the drive wheel
and bar and tighten the cover knob.
A CORRECTLY TENSIONED CHAIN
REINSTALL THE TRANSMISSION COVER

English - 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.
3. Remove the handle.
4. Pull out the gear box from the gear box
seating. The gear box is now free.
ASSEMBLE
5. Assemble according to the instructions given
above in reversed order.
UNSCREW THE MOUNTING SCREW FOR THE GEAR BOX
SEATING
REMOVE THE HANDLE
REMOVE THE GEAR BOX FROM THE GEAR BOX SEATING

20 - English
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. Pump until you see
new grease entering between the nose wheel
teeth. Rotate the chain a couple of laps to even
out the grease.
4. Assemble the chain and bar according to the
assembly instructions given in chapter 6.2 step
13 - 21.
NOTE!
As a rule of thumb. The bar should be
replaced for each third change of chain. The
drive wheel should be replaced for each third
change of bar.
7.2. REPLACING THE DRIVE WHEEL
1. Dismount the gear box according to the dis-
mantling instructions given in chapter 6.2 step
1 - 12 and chapter 6.3 step 1 - 4.
2. Fix the pivoting arm cradle firmly in a vice.
3. Fit the gear box on the pivoting arm cradle with
the drive wheel facing up.
ADD GREASE AT THE TIP OF THE BAR
FIX THE PIVOTING ARM CRADLE IN A VISE
7. REPAIR INSTRUCTIONS