Husqvarna PW 450 Page 9 Workshop Manual Download | Manualshive

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English – 9

5. Remove the detergent hose from the hose

connection.

6. Remove the internal high pressure hose (A) and the

6 torx screws (B).

7.

A

B

B

The motor can now be removed and the motor/pump

unit can be lifted out from the cabinet.

Repair instructions

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Summary of Contents for PW 450

Page 1: ...Workshop manual English PW 450 PW 460 ...

Page 2: ...e 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 fine adjust the machine pressure 18 2 10 8 To secure the machine pressure setting 18 3 Specifications 19 3 1 Tec...

Page 3: ...risk of material damage if the instructions are not followed 1 4 2 Special safety instructions WARNING Do not use accessories and or do changes that are not approved by the manufacturer This can cause injury or death to the operator or other persons WARNING Always use original spare parts and accessories WARNING Use approved hearing protec tion Noise from the product can result in permanent hearin...

Page 4: ... environment where there could be a danger of explosion If any doubt arises contact the local authorities WARNING It is not allowed to clean asbes tos containing surfaces with high pres sure WARNING This high pressure washer must not be used at temperatures below 0 C WARNING Never let any persons stay under the product when stored on the wall ...

Page 5: ...English 5 2 Repair instructions Repair instructions 2 1 Product overview 2 1 1 Cabinet parts overview Front 9 Rear ...

Page 6: ...6 English Repair instructions 2 1 2 Motor Pump unit overview 15 Nm 20 Nm 8 Nm SEALING SYSTEM CERAMIC SP SEALING SYSTEM STAINLESS SP 15 Nm 4 Nm Loctite 680 1 2 Nm Loctite 680 ...

Page 7: ... the bottom The thread slider can be damaged if too high torque is used CAUTION Press the cabinet before tighten ing the screws 1 Remove the 2 torx 20 screws from the hose reel 2 Loosen the 2 torx TX20 screws from the bottom of the product and push them in completely The front cabinet can now be removed Repair instructions ...

Page 8: ...r plug capacitor plug and ground cable 3 Assembly Fix the capacitor with a cable tie Make sure that the marking is visible Make sure that the cable tie is placed correctly see the arrow in the figure below 4 Install the cables and wires correctly see the figure below Make sure that the ground cable is installed correctly placed around the tube See the figure below Repair instructions ...

Page 9: ... detergent hose from the hose connection 6 Remove the internal high pressure hose A and the 6 torx screws B 7 A B B The motor can now be removed and the motor pump unit can be lifted out from the cabinet Repair instructions ...

Page 10: ...at they are not damaged Replace all damaged parts 4 Replace the oil 80 ml 5 Clean the D bearing in the motor with compressed air or petrol Make sure to remove all parts dust from any damaged parts Make sure that no parts dust is caught in the D bearing 6 Examine the D bearing after cleaning Make sure that it rotates smoothly without any friction when it rotates slowly 7 Clean all parts both new an...

Page 11: ...icate the oil seal with silicone grease Unisilkon in the Ø14 holes 3 pcs 5 Install the U sleeve correctly inside the cylinder head Lubricate the U sleeve with silicone grease Unisilkon inside the Ø14 hole 1 pcs where the piston moves Lubricate the plane surface of the U sleeve NOTE If ceramic pistons are used put the additional disc on top of the water sealing 6 Install the pistons 7 Install the o...

Page 12: ...that the o ring is correctly placed around the piston Install the thrust collar in the groove see the figure below NOTE Remember to install the o ring around the piston before you install the thrust collar Repair instructions ...

Page 13: ...94 49 01 2 Remove the injector Use an M6 puller part number 592 94 48 01 2 6 To disassemble assemble the start stop valve 1 Remove the U pin 2 Remove the start stop valve 3 Remove the ball seat Use an M8 puller part number 592 94 49 01 NOTE This can be done without removing the motor pump unit from the cabinet Repair instructions ...

Page 14: ...the micro switch The clearance must only just disappear 0 preload and 0 clearance 8 Carefully turn the M5 nut 90 30 clockwise This will move the key approximately 0 2mm away from the micro switch 9 Make sure that there is a clearance between the key and the micro switch 10 Put Loctite 454 on the key end to lock the M5 nut The key adjustment is now done 11 Check again to make sure that there is a c...

Page 15: ... 2 Install the nipple in the hose reel 2 9 To measure the resistance of the electrical motor 3 3 kW Motor 2 9 kW Motor 2 3 kW Motor 1 2 6 Ω 10 2 8 Ω 10 2 8 Ω 10 2 3 8 Ω 10 4 1 Ω 10 4 1 Ω 10 3 1 2 Ω 10 1 3 Ω 10 1 3 Ω 10 3 1 2 Earth wire Capacitor plug Power supply plug Repair instructions ...

Page 16: ...y switch off again when the spray gun is closed If necessary seal the high pressure system and replace the start stop switch and or control piston 2 10 2 To remove the control piston 1 Remove the shroud 2 Remove the fastening screw T20 1 and pull out the clip 2 to unlock the control piston 3 Push the pump housing to the capacitator side and simultaneously pull out the control piston 1 Pay attentio...

Page 17: ...ry knob 2 and turn it clockwise 8 If necessary set high pressure nozzle to maximum pressure 2 10 5 To check cut off pressure 1 Start machine and open the spray gun for approximately 15 seconds 2 Close spray gun and read cut off pressure on the pressure gauge after approx 5 seconds The cut off pressure should be approx 25 bar above the maximum indicated working pressure If the value is too high or ...

Page 18: ...edure when the spray gun is open working pressure The cut off pressure must also remain constant If necessary the setting must be repeated or the high pressure cleaner inspected for leaks 2 10 8 To secure the machine pressure setting 4 Secure this setting of the adjusting nut with locknut 1 5 Afterwards check correct operation of the control piston 6 Switch the machine off and remove test pressure...

Page 19: ... rate HP l min 8 4 8 8 Pump pressure bar 126 9 135 9 Nozzle pressur bar 105 9 114 9 Standby pressure bar 135 15 140 10 Retaining time min 5 5 Oil contents ml 80 80 Oil type BP Bartran HV68 BP Bartran HV68 Max inlet water temperature C 60 60 Max inlet water pressure bar 10 10 High pressure hose length m 13 15 Suction height m 0 5 0 5 Supply cable length m 5 5 Insulation class Motor F F Ingress prot...

Page 20: ...ternative oil types that are allowed Shell Tellus T 68 Exxon Statoil Univis N 68 4 1 2 Recommended lubrication White grease for o rings sealing etc Silicone grease Unisilkon DOW CORNING R M 55 O RING LUBRICANT 4 1 3 Recommended glue Loctite 680 alternatively Loctite 270 or 271 Loctite 243 alternatively Loctite 245 to lock the adjustment bolt at the start stop system Loctite 454 on the key end to l...

Page 21: ... 94 48 01 1 M8 Puller For valve head 592 94 49 01 2 T handle Torx T20 For screws with torx head 588 59 85 01 3 T handle Allen key 6 mm For screws with hexagonal socked head 504 90 00 01 4 Screw driver Flat For lock clamps N A 5 Test manometer Testing out the pressure 593 36 20 01 Appendices and schedules ...

Page 22: ... its spring Ball valve pressed against the right seat by spring at the right side of S S piston Motor pump is stopped Machine operation Breaker is inactivated as no force press the button and motor is running S S piston is pulled by S S spring no other forces Gun trigger is activated NRV is open by pressure and flow from pump Ball valve pressed against the left seat by pressure from the pump Motor...

Page 23: ...iston is pushed to standby by pressure in hose spring is pressed Gun trigger released NRV is closed by pressure in hose Ball valve pressed against the right seat by spring at the right side of S S piston No pressure from the pump as motor is stopped Motor pump stopped Pressure control valve standby Appendices and schedules ...

Page 24: ...24 English 4 2 5 Start stop system guide no pressure in the system 4 2 6 Start up pressure build up Appendices and schedules ...

Page 25: ...English 25 4 2 7 Pressure build up opening pressure close gun 4 2 8 Motor stop standby pressure Appendices and schedules ...

Page 26: ...26 English 4 2 9 Gun is activated 4 2 10 Machine run Appendices and schedules ...

Page 27: ...English 27 Appendices and schedules 4 2 11 Pressure control valve active ...

Page 28: ...2 1 C1 br S1 2a S2 1a hv hv br so so N gu gr JP only green Ø L M 1 br bl so gu hv C1 S1 S2 CU M WU Brown Blue Black Yellow White Capacitor Switch Single pole switch micro switch Control unit Motor Wireless unit Appendices and schedules ...

Page 29: ...tch so so P so bl M C1 hv hv 1 br N PE gu gr JP only green Thermo 180 JP 160 Ø gu gr JP only green br bl so gu hv C1 S1 S2 CU M WU Brown Blue Black Yellow White Capacitor Switch Single pole switch micro switch Control unit Motor Wireless unit Appendices and schedules ...

Page 30: ...115 97 61 26 2017 11 24 ...

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