Husqvarna 340i Instruction manual

Workshop manual
340i
English
1435 - 001 - 11.06.2020

Contents
1 Introduction
1.1 Document description............................................ 3
1.2 Target group...........................................................3
1.3 Revisions................................................................3
1.4 Safety..................................................................... 3
1.5 Servicing tools........................................................3
2 Safety
2.1 Safety definitions....................................................4
2.2 General safety instructions.....................................4
2.3 Symbols on the product......................................... 4
2.4 Special safety instructions......................................4
3 Servicing data
3.1 Servicing data (digital user interface).....................5
3.2 Servicing data (mechanical user interface)............ 7
4 Servicing tools
4.1 Servicing tools........................................................9
4.2 Electrical diagram.................................................10
5 Repair instructions
5.1 To clean and examine the product parts..............11
5.2 Drive sprocket and guide bar............................... 11
5.3 Chain tensioner ................................................... 13
5.4 Crankcase............................................................ 15
5.5 Power trigger........................................................16
5.6 Front handguard...................................................20
5.7 Motor and control unit.......................................... 20
5.8 User interface.......................................................23
5.9 Chain oil tank....................................................... 24
5.10 Chain brake........................................................24
5.11 Oil pump.............................................................26
6 Troubleshooting
6.1 Diagnostic tools....................................................27
6.2 Troubleshooting of the product............................ 28
6.3 Troubleshooting of the battery and battery
charger....................................................................... 30
7 Technical data
7.1 Technical data......................................................32
21435 - 001 - 11.06.2020

1 Introduction
1.1 Document description
This manual gives a full description of how to do
maintenance and repair on the product. It also gives
safety instructions that the personnel must obey.
1.2 Target group
This manual is for personnel with a general knowledge
of how to do repair and do servicing. All personnel that
do repair or do servicing on the product must read and
understand the manual.
1.3 Revisions
Changes to the product can cause changes to the
maintenance work and spare parts. Separate
information is sent out for each change.
Read the manual together with all received information
about changes to maintenance and spare parts for the
product.
1.4 Safety
WARNING: All personnel that repair or do
servicing on the product must read and
understand the safety instructions in this
workshop manual.
1.5 Servicing tools
The manual gives information about necessary servicing
tools. Always use original tools from Husqvarna.
1435 - 001 - 11.06.2020 Introduction - 3

2 Safety
2.1 Safety definitions
Warnings, cautions and notes are used to point out
specially important parts of the manual.
WARNING: Used if there is a risk of injury or
death for the operator or bystanders if the
instructions in the manual are not obeyed.
CAUTION: Used if there is a risk of damage to
the product, other materials or the adjacent area
if the instructions in the manual are not obeyed.
Note: Used to give more information that is necessary in
a given situation.
2.2 General safety instructions
WARNING: Apply a new warning label if a
warning symbol on the product is damaged or
missing.
2.3 Symbols on the product
Fill with chain oil
Start/Stop
savE / Battery save mode
Warning lamp/Fault indicator
Indication of chain direction
Chain brake
2.4 Special safety instructions
2.4.1 To remove the battery
WARNING: Always remove the battery before
you do repairs or do servicing on the product.
WARNING: Do not put the battery back until the
product is assembled.
1. Press in the catches and remove the battery.
2.4.2 Cutting equipment safety
WARNING: Always remove the cutting
equipment before you do repairs or do servicing
on the product.
WARNING: Do not install the cutting equipment
until the product is assembled.
4 - Safety 1435 - 001 - 11.06.2020

3 Servicing data
3.1 Servicing data (digital user interface)
▲ Lubricate with chain oil.
● Lubricate with grease.
1 - 2 Nm T20
1 - 2 Nm T20
7 - 8 Nm T27
(x3) 3.5 Nm T27
(x2) 1.8 - 2.2 Nm T27
(x5) 2.2 Nm T27
2.5 - 3 Nm T27
(x4) 1 - 2 Nm T20
3 Nm T27
1435 - 001 - 11.06.2020 Servicing data - 5

(x1) 4 Nm T27
(x2) 4 Nm T27
(x9) 2.5 - 3 Nm T27
(x4) 3 - 4 Nm T27
6 - Servicing data 1435 - 001 - 11.06.2020

3.2 Servicing data (mechanical user interface)
▲ Lubricate with chain oil.
● Lubricate with grease.
7 - 8 Nm T27
(x3) 3.5 Nm T27
(x2) 1.8 - 2.2 Nm T27
(x5) 2.2 Nm T27
2.5 - 3 Nm T27
(x4) 1 - 2 Nm T20
3 Nm T27
1 - 2 Nm T20
1 - 2 Nm T20
1435 - 001 - 11.06.2020 Servicing data - 7

(x1) 4 Nm T27
(x2) 4 Nm T27
(x9) 2.5 - 3 Nm T27
(x4) 3 - 4 Nm T27
8 - Servicing data 1435 - 001 - 11.06.2020

4 Servicing tools
4.1 Servicing tools
CST
INSTRUCTION
321
Posi-
tion
Description Use Article No.
1 Diagnostic tool kit To do a check of the product and install updates to the firm-
ware.
583 89 71-01
2 Adapter cable for battery
products
To do a check of battery products with the diagnostic tool kit. 581 19 23-01
3 T-handle Torx, T20 To loosen or remove Torx screws. 588 59 85-01
3 T-handle Torx, T27 To loosen or remove Torx screws. 502 71 27-03
1435 - 001 - 11.06.2020 Servicing tools - 9

4.2 Electrical diagram
1
4
7
3
6
9
2
5
8
Battery
White
Red
Blue
J8
J8
J7
J4
J3
J2
J5
J1
1
4
7
3
6
9
2
5
8
J10
J10
J12
Grey
2
J7
1
3
2
1
2
1
Yellow
Pink
1 1
2 2
Red
White
Black
Black
Grey
White
Blue Yellow Grey Green Black Orange Red
Pink
1 2 3 4 5 6 7 8 9
Trigger
White Blue Grey Green Black Orange Red
123 4 56789
1 2 3 4 5 6 7 8 9
White Black
1 2 3
Switch
Motor
10 - Servicing tools 1435 - 001 - 11.06.2020