Husqvarna PW 450 User Manual

2 – English
Workshop Manual
PW 450, PW 460
Contents
1 Introduction and safety regulations ............... 3
1.1 General ..........................................................................3
1.2 Revisions ........................................................................3
1.3 Target group ...................................................................3
1.4 Safety instructions ..........................................................3
1.4.1 General safety instructions ...................................3
1.4.2 Special safety instructions ....................................3
2 Repair instructions ........................................... 5
2.1 Product overview ............................................................5
2.1.1 Cabinet parts overview ........................................5
2.1.2 Motor/Pump unit overview ....................................6
2.2 To disassemble/assemble the front cabinet ...................7
2.3 To disassemble/assemble the switchbox
and motor cover .............................................................8
2.4 To disassemble/assemble the pump ............................10
2.4.1 To do maintenance on the bearing .....................10
2.4.2 To do maintenance on the pump head ...............11
2.5 To disassemble the brass connector inside the outlet ..13
2.6 To disassemble/assemble the start/stop valve .............13
2.7 To adjust the micro switch ............................................14
2.8 To replace the hose (hose reel version) .......................15
2.9 To measure the resistance of the electrical motor ........15
2.10 To service and repair the pressure regulation ............16
2.10.1 To check correct operation ................................16
2.10.2 To remove the control piston .............................16
2.10.3 To install the control piston ...............................16
2.10.4 To prepare for check of the cut-off pressure .....17
2.10.5 To check cut-off pressure ..................................17
2.10.6 To put the machine pressure in basic setting ....17
2.10.7 To ne adjust the machine pressure .................18
2.10.8 To secure the machine pressure setting ...........18
3 Specications ................................................. 19
3.1 Technical data PW450 and PW 460 .............................19
4 Appendices and schedules ........................... 20
4.1 Operating supplies .......................................................20
4.1.1 Recommended oil types .....................................20
4.1.2 Recommended lubrication ..................................20
4.1.3 Recommended glue ............................................20
4.1.4 Tools ...................................................................21
4.2 Function .......................................................................22
4.2.1 Machine stopped and outlet hose emptied .........22
4.2.2 Machine operation ..............................................22
4.2.3 Machine standby .................................................23
4.2.4 Pressure control valve standby ...........................23
4.2.5 Start stop system guide - no pressure
in the system .......................................................24
4.2.6 Start-up pressure build up ..................................24
4.2.7 Pressure build up-opening pressure / close gun 25
4.2.8 Motor stop - standby pressure ............................25
4.2.9 Gun is activated ..................................................26
4.2.10 Machine run ......................................................26
4.2.11 Pressure control valve active ............................27
4.3 Wiring diagram .............................................................28
4.4 Circuit diagram ............................................................29

Husqvarna PW 450 Specifications

General

Brand	Husqvarna
Model	PW 450
Category	Pressure Washer
Language	English