Table Of Contents - Husqvarna 545RXT AT Workshop Manual

Brushcutter, Trimmer
Model 545RXT AT, 545FX AT, 545FXT AT,
1 Introduction and safety instructions .....4
1.1 General ............................................................. 4
1.2 Revisions .......................................................... 4
1.3 Target group ...................................................... 4
1.4 Safety instructions ............................................. 4
1.5 Structure ........................................................... 5
1.6 Numbering ........................................................ 5
1.7 Tools .................................................................. 5
1.8 Symbols on the product .................................... 5
2 Technical data ..........................................6
3 Service tools ............................................8
4 Service data ...........................................10
5 Handle system .......................................14
5.1 Dismantling the stop switch ............................ 14
5.2 Cleaning and inspection .................................. 14
5.3 Assembling the stop switch ............................. 14
5.4 Dismantling the throttle (finger) ....................... 14
5.5 Dismantling the throttle (thumb) ...................... 14
5.6 Assembling the finger throttle .......................... 16
5.7 Assembling the thumb throttle ......................... 16
5.8 Replacing the heating elements in the handles 18
6 Muffler .....................................................20
6.1 Dismantling ..................................................... 20
6.2 Cleaning and inspection .................................. 20
6.3 Assembling ...................................................... 20
7 Starter .....................................................21
7.1 Dismantling .................................................... 21
7.2 Cleaning and inspection .................................. 21
7.3 Assembling ...................................................... 22
8 Ignition system ......................................23
8.1 Checking the ignition spark ............................. 23
8.2 Dismantling the ignition module ...................... 25
8.3 Dismantling the flywheel ................................. 26
8.5 Dismantling the generator ............................... 27
8.4 Replacing the drive dogs ................................ 27
8.6 Assembling the flywheel and ignition module . 28
8.7 Assemble the ignition module ......................... 28
9 Carburettor .............................................29
9.1 Description ...................................................... 29
9.2 Design ............................................................. 29
9.3 Function .......................................................... 29
Workshop manual
545FX, 545FXT, 545RX, 545RXT
9.4 Removing the carburettor from engine unit ..... 31
9.5 Dismantling ..................................................... 35
9.6 Assembling ...................................................... 38
9.7 Assembling the carburettor on the engine unit 40
9.8 After replacing the carburettor AutoTune ........ 44
9.9 Engine adjustment .......................................... 44
10 Fuel system ..........................................45
10.1 Dismantling the air filter ................................ 45
10.2 Cleaning and inspection of the air filter ......... 45
10.3 Tank venting .................................................. 46
10.4 Cleaning the fuel cap .................................... 46
10.5 Replacing the air purge and fuel filter .......... 47
11 Centrifugal clutch ................................48
11.1 Dismantling ................................................... 48
11.2 Dismantling clutch assembly ......................... 49
11.3 Dismantling clutch shoes and springs ........... 50
11.4 Cleaning and inspection ................................ 50
11.5 Assembling clutch shoes and springs ........... 51
11.6 Assembling clutch assembly ......................... 51
12 Clutch drum .........................................52
12.1 Dismantling ................................................... 52
12.2 Inspection ...................................................... 53
12.3 Assembling .................................................... 53
13 Gear head .............................................54
12.4 Dismantling ................................................... 54
13.1 Assembling .................................................... 56
14 Cylinder and piston .............................57
14.1 Dismantling the cylinder and piston .............. 57
14.2 Cleaning and inspection ................................ 58
14.3 Pressure testing the cylinder ......................... 59
14.4 Assembling .................................................... 60
14.5 Analysis and actions ..................................... 61
15 Crankshaft and crankcase ..................69
15.1 Dismantling ................................................... 69
15.2 Inspection ...................................................... 71
15.3 Assembling .................................................... 72
16 Troubleshooting ..................................74
16.1 Engine running issue .................................... 75
16.2 Ignition System Diagnostic Flow Chart ......... 77
16.3 Spark Test ..................................................... 78
English - 3