Husqvarna K 1260 Instruction manual

HUSQVARNA CONSTRUCTION PRODUCTS
Workshop manual
K 1260

2
1. LITERATURE 3
2. MODELS 4
3. COMPONENTS – ORIENTATION 5
4. DISMANTLING INTO BASIC MODULES 6
5. STARTER 10
6. IGNITION SYSTEM 13
7. FLYWHEEL 16
8. AIR FILTER 18
9. INLET SYSTEM 19
10. FUEL SYSTEM 21
11. CARBURETTOR 24
12. DECOMPRESSION VALVE 29
13. CYLINDER/PISTON 30
14. CRANKCASE 36
15. CLUTCH 41
16. CUTTING HEAD 44
17. WET SYSTEM 49
18. HANDLE 50
19. TOOLS 53
CONTENTS Page
HUSQVARNA
K 1260

3
LITERATURE1
Workshop Manual
The Workshop Manual includes virtually
all workshop procedures that can come into
question on the K1260. Some very simple and
self-evident repairs have been omitted.
Outline
An introductory section with the title
“Dismantling into Basic Modules” shows how
the machine is dismantled into large component
units, for example, the starter, cutting arm, air
filter, etc.
The manual goes on to describes in detail
through the different chapter how work on the
basic modules should be carried out.
This arrangement means that as a mechanic,
at least until you have learnt the basic composi-
tion of the machine, you need to start with the
chapter “Dismantling into Basic Modules” to
then move on to the chapter covering the
specific service work.
Layout – pictures and text
Besides the pictures and illustrations there is
generally two columns of text. The left-hand text
column is a concise and is suitable for experienced
mechanics, the right-hand column gives a more
detailed description and is targeted at mechanics
with less experience of repair work on the power
cutter.
Contents
The manual is divided into numbered chapters
together with chapter headings that are stated in
bold at the top of each page.
The list of contents also has page references to
the start of each chapter.
Spares
Spares K1260
The folder includes all spare parts for
Husqvarna K1260 and the special model
K1260 Rail.
The folder contains complete exploded
drawings for the whole machine where the
location, spares number and appearance of each
component is easy to identify.
HUSQVARNA CONSTRUCTION PRODUCTS
Workshop manual
K 1260
IPL, K1260, K1260 RAIL, 2010-05, 576 13 90-01
K1260
K1260 RAIL
Reservdelar
Spare parts
Ersatzteile
Pieces de rechange
Piezas de repuesto
Ricambi
Peças sobresselente
576 13 90-01
“Dismantling into Basic Modules”
“Cutting head” (Example)

MODELS
4
K1260
This is the basic model of the K1260 and is
available for blade diameters 14 ˝ (350 mm)
and 16 ˝ (400 mm). The machines are com-
pletely identical except for the blade guard
size.
K1260 Rail
This is a special version of K1260, which is
designed for track cutting, together with the
fixture RA10.
K1260 Rail has a custom front bearing
housing with connection for the track cutting
fixture. The blade guard is chrome plated to
withstand high temperatures. The blade guard
has no kit for wet cutting.
The Rail version is also available for blade
diameters 14˝ (350 mm) and 16˝ (400 mm).
The blade guard, belt pulleys and front belt
guard are different for the 14 and 16 inch
versions.
2
RA10
K1260
K1260 Rail

COMPONENTS – ORIENTATION3
5
Components
1. Cutting blade
2. Blade guard
3. Adjustment handle for the blade
guard
4. Front handle
5. Air filter cover
6. Cylinder cover
7. Filler cap
8. Starter handle
9. Starter
5
4
1
23
6
879
10
12
13
14
15
19
20
21
16
18
11
17
23
24
10. Tool bracket with combination
wrench
11. Front belt guard
12. Belt adjuster screw
13. Locking screws for belt adjustment
14. Rear belt guard
15. Throttle
16. Rear handle
17. Throttle lock
18. Decompression valve
19. Water valve
20. Water connection
21. Choke
22. Fuel tank
23. Starter throttle lock
24. Stop switch
22

Basic modules
This chapter shows how the machine is
built up of basic modules, for example,
the starter, carburettor, air filter system,
etc.
The purpose is to illustrate how you
can easily and effectively dismantle and
assemble the machine in its basic modules.
Service work on a component level, for
example, replacing the starter cord, is
described in detail in respective chapters.
Cutting head
1. Loosen the screws to the cutting head.
2. Loosen the tension of the belt with the
adjuster screw. Remove the screws to the
cutting head.
3. Detach the hose clip.
4. Remove the front belt guard by
pushing it forward.
5. Lift off the belt from the belt pulley
and remove the cutting head.
6. Remove the rear belt guard bolts.
7. Lift off the guard.
At this stage, the belt can be replaced.
DISMANTLING INTO BASIC MODULES 4
6
Starter
1. Loosen the cover's 4 screws.
2. Remove the starter.
12
12 3
45
67

DISMANTLING INTO BASIC MODULES
4
7
Air filter
1. Loosen the guard's three screws and
remove the guard.
2. Unscrew the filter's centre screw.
Cutting arm
1. Remove the nut and the three screws.
2. Lift off the cutting arm. Check when
reassembling that the two pipe guides are
in place.
3. Carefully lift up the paper filter so
that dust does not fall into the carbu-
rettor inlet.
Cylinder cover
1. Loosen the cylinder cover's five screws.
2. Lift off the cylinder cover.
Carburettor
1. Loosen the two screws at the inlet
elbow.
2. Unscrew the screws to release the
carburettor.
3. Turn the carburettor and remove the
choke and fuel hose.
4. Loosen the wire nipple on the opposite
side.
5. Note the channel and corresponding
holes in the gasket. This is the pressure
relief channel for the filter compensation
(SmartCarb).
12
3
12
12
345

DISMANTLING INTO BASIC MODULES 4
8
Air line
Remove the entire air filter unit, cylinder
cover and the starter.
Note how the cable to the stop switch
and ignition cable are fitted in the air
line.
Disconnect the ignition cable at the
spark plug and release the cable from the
air line.
Loosen the cable lug at the ignition
module. Remove the air line.
Centrifugal nozzle
The flywheel must first be taken out to
remove the nozzle. This is described on
page 16.
Remove the screw and take off the
nozzle.
Inlet pipe
The connection between the carburettor
and the cylinder is flexible. Vibrations
and heat transfer to the carburettor are
minimised.
1. The rubber pipe is pushed onto the
plastic frame which also serves as a hol-
der of the throttle wire. Note the impulse
channel in the rubber pipe, bottom left,
which connects the crankcase to the car-
burettor pump diaphragm.
Dismantling
2. Press the rubber pipe together and pull
out the plastic frame.
3. Remove the two screws to the cylinder
and remove the inlet pipe.
4. Examine the components for dust leaks.
Assembly
Be extremely careful when fitting the
plastic collar on the rubber pipe to avoid
leaks.
12
Muffler
Remove the cutting head, cutting arm,
air filter and cylinder cover.
The muffler is secured with three
screws. Remove these and take off the
muffler.
Assembly
The insulating fibre gasket must be placed
between the muffler and heat shield.
The heat shield must be next to the
cylinder, without gasket.
34

DISMANTLING INTO BASIC MODULES4
9
Anti-vibration
Several service work operations can be facilitated by dividing the machine at
the anti-vibration elements. The following must be done before dividing:
– remove the air filter unit and cylinder cover
– remove the starter
– loosen the cable lug at the ignition module and detach the air line
– pull the fuel lines from the carburettor
– remove the throttle wire at the carburettor
The engine unit is attached to the handle unit at five points with anti-
vibration elements in the form of springs an rubber dampers. A movement
limiter must also be removed.
502 50 66-02
Dividing the machine
Remove the vibration dampers' outer
screws:
1. Above the filler cap
2. Next to the handle frame
Measures for replacement: Detach the
fuel hose and the throttle wire at the car-
burettor. Remove the outer screws at
dampers 3 and 5, and movement limiter
6. The machine body can then be tilted
forwards. Remove the springs using the
Allen key 4 mm.
3. Below the flywheel
4. Above the ground support
5. Next to the cylinder
6. Remove the screw
Measures for replacement: To replace the
spring 4 and dampers 3 and 5, the outer
screws 1 and 2 must first be removed.
Now remove the outer screws to dampers
3 and 5, and spring 4. Also remove the
movement limiter 6. The machine body
can then be separated from the handle
unit and dampers making the spring
accessible.
To remove the rubber dampers from
the machine body you need the special
tool 502 50 66-02. The U-key is pressed
into the slot of the internal metal washer
and the dampers are unscrewed using the
U-key.
Spring 4 is removed with a Torx
wrench.
12
5
6
34
–2011-05 2011-05–
4 mm 4 mm

STARTER 5
10
Replacing the starter cord
Dismantle the starter.
Eliminate the spring force from
the return spring
1. Pull out the starter cord approximately
12 in./30 cm. Hold the starter pulley
with your thumb and place the cord in
the cut-out on the starter pulley.
2. Let the starter pulley rotate slowly and
wind up the cord on the metal sleeve.
3. Lift off the cord from the starter
pulley.
Attach the new starter cord
The starter cord should be 45 in./
115 cm long and have a diameter of
.16 in./4 mm.
1. Insert one end of the cord from the
top through the hole in the starter pulley
and then out through the notch for the
cord. Pull out virtually the whole cord
length until sufficient cord remains to tie
a knot as illustrated.
2. Insert the other end through the cover
and on through the handle. Tie a double
knot as illustrated.
Loading the return spring
1. Fit the starter cord in the cut-out.
2. Wind the starter cord 4 turns around
the hub.
3. Pull out the starter handle so the cord
rolls off the hub.
4. Release so the cord is wound on the
starter pulley.
Repeat the procedure with 3 turns of
cord around the hub.
Important check!
Check that the return spring does not act
as an end stop by extending the cord
fully. In this position it should be possible
to turn the starter pulley a least a further
half turn before the spring stops the
movement.
1
1
2 3
2
1 2
3 4