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Nilfisk-Advance 107146895, Service Manual, Page: 25 / 101

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Nilfisk-Advance 107146895 Service Manual Download Page 25

Construction 

SM_MH 3M_4M Ver.1.2_May 2016 

 25 

C 

MH 3M variats: 

MH 3M -140/580 PA ”EU”, 230/1/50/16 
MH 3M -100/600 PA ”EU”, 230/1/50/13 
MH 3M -160/770 PA ”EU”, 400/3/50/8 

Lance holder 

Hook f. HP hose 

Lock f. service door 

Fuel tank cap 

Service door 

Operating panel 

Water outlet 

Holders f. Spray handle 

Detergent container 

Water inlet 

Brake 

Detergent container 

Lance holder 

Turnable hook f. cable 

Service door w. wenting ribs 

MH 3M 

Summary of Contents for 107146895

Page 1: ...MH 3M MH 4M SERVICE MANUAL SM_MH 3M_4M Ver 1 2_May 2016...

Page 2: ...rated spare parts lists during repairs They show the assembly position and the sequence in which the individual components should be assembled See Technical Service Bulletin TSB sheets They include in...

Page 3: ...A B C D E F G H I Special tools Wiring diagrams Adjustment Test Service Repair Troubleshooting Function Construction Technical data Safety instructions 4 5 24 25 40 41 56 57 59 60 81 82 90 91 98 99...

Page 4: ...e Only allow the high pressure Repair work should be carried out by persons instructed in electrical installations or by trained electricians only Take the following ESD precautions before carrying ou...

Page 5: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 5 B...

Page 6: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 6 B...

Page 7: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 7 B...

Page 8: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 8 B...

Page 9: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 9 B...

Page 10: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 10 B...

Page 11: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 11 B...

Page 12: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 12 B...

Page 13: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 13 B...

Page 14: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 14 B...

Page 15: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 15 B...

Page 16: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 16 B...

Page 17: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 17 B...

Page 18: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 18 B...

Page 19: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 19 B...

Page 20: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 20 B...

Page 21: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 21 B...

Page 22: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 22 B...

Page 23: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 23 B...

Page 24: ...Technical data SM_MH 3M_4M Ver 1 2_May 2016 24 B...

Page 25: ...0 PA EU 230 1 50 13 MH 3M 160 770 PA EU 400 3 50 8 Lance holder Hook f HP hose Lock f service door Fuel tank cap Service door Operating panel Water outlet Holders f Spray handle Detergent container Wa...

Page 26: ...ensor Ignition electrodes Fan housing Outlet HP hose Chimney Flow switch Safety valve Lid for Water Break Tank Lid for adding Anti freeze AntiStone valve AntiStone adjustment Lock f service door Fuel...

Page 27: ...mney Double Flow switch Double non return valve Lid for Water Break Tank Lid for adding Anti freeze AntiStone valve AntiStone adjustment Lock f service door Oil container High Pressure Outlet Pipe Byp...

Page 28: ...housing Outlet HP hose Chimney Flow switch Safety Valve Lid for Water Break Tank Lid for adding Anti freeze AntiStone valve AntiStone adjustment Lock f service door Oil container High Pressure Outlet...

Page 29: ...Operating panel MH 3M Thermostat Detergent dosing valve ECO mode EcoMode for low con sump on hea ng stage at 60 C ON OFF switch Cold water mode Hot water mode Power ON AntiStone low Service interval d...

Page 30: ...panel MH 4M Thermostat De ECO mode EcoMode for low con sump on hea ng stage at 60 C ON OFF switch Cold water mode Hot water mode Power ON AntiStone low Service interval due expired Boiler overheated N...

Page 31: ...nt dosing valve Board with LED s Thermostat ON OFF switch AntiStone tank The control transformer is placed below the NEO main circuit board Push on the 3 plastic clips on the side of the of the circui...

Page 32: ...ottom and top in a sandwich construction between which the combustion air is routed into the combustion An insulating material placed in the bottom of the boiler makes sure that the inner bottom among...

Page 33: ...lips must be opened 2 of the clips are shown on the picture above Now the lid can be removed from the water break tank If needed in very dirty invironments the 50 m micron water inlet filter can be in...

Page 34: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 34 C MH 3 MH 4 Chassis...

Page 35: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 35 C MH 3 MH 4 Cabinet...

Page 36: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 36 C MH 3 MH 4 Hose reel...

Page 37: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 37 C MH 3M PA Pump components Motor components...

Page 38: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 38 C MH 4M PA Motor pump components Motor pump components Unloader components...

Page 39: ...Construction SM_MH 3M_4M Ver 1 2_May 2016 39 C MH 4M FA Motor pump components Motor pump components By pass valve components...

Page 40: ..._MH 3M_4M Ver 1 2_May 2016 40 C MH 3M MH 4M Flow switch Flow switch MH 3M 4M PA 3 Flow piston 4 Reed switch 8 Safety valve Flow switch MH 4M FA 3 Flow piston 4 Reed switch 5 10 Double non return valve...

Page 41: ...witch to by pass mode for 20 sec before it stops PA pressure activated models gets a stop signal from the micro switch Once machine has started up the status indicator lights up the green light on the...

Page 42: ...ill be added into the water break tank and the low level indi cator will be ignored Once the adjustment is set between and 4 the dosage will be according the user manual Low level indicator is active...

Page 43: ...ch to by pass mode for 20 sec before it stops FA flow activated models gets a stop signal from the flow switch Once machine has started up the status indicator lights up the green light on the plug ic...

Page 44: ...nto the water break tank and the low level indi cator will be ignored Once the adjustment is set between and 4 the dosage will be according the user manual Low level indicator is active in this settin...

Page 45: ...outer to the air distributor This pre heats the air before it mixes with the fuel spray from the fuel nozzle Cold water is fed to the inner circuit in where the boiler temperature is highest This redu...

Page 46: ...mode constant ignition and generates ignition sparks across the electrodes to ignite the fuel spray This process is monitored by the flame sensor on top of the boiler In normal operation the flame and...

Page 47: ...the oil level gets below min the machine stops and a light comes ON in the display B7 Flame sensor detects light from the flame If the flame is not detected when it should be there the machine will s...

Page 48: ...tch Motor starts Easy start valve is open until pressure starts to build up in the pump the pressure is building up until it reach the cut off pressure When the cut off pressure is reached the control...

Page 49: ...ted on the main switch Motor starts the pressure is building up until it reach the cut off pressure When the cut off pressure is reached the control piston is pushed upwards by the higher pressure the...

Page 50: ...istons than under the lower piston the by pass valve is closed and the machine runs in working mode When the spray gun is closing the flow shortly stops and the pressure rises The opening pressure val...

Page 51: ...lance and high pressure nozzle the spray handle 8 is now activated The non return valve 7 opens the pressure in the hose drops and release the pressure on the backside of the unloader piston 5 The un...

Page 52: ...5 is pressed forward caused by the outlet pressure exceeding the pressure from the unloader spring the By pass ball 6 is moved forward and opens the connection between the water inlet and the water ou...

Page 53: ...spray handle and open water regulator 1 Valve for water regulation is open Approx 50 of water volume is run ning in by pass back to suction side in pump 2 Water can pass through the non return valve...

Page 54: ...ure position open spray handle and open water regulator 1 Valve for water regulation is open Approx 50 of water volume is run ning in by pass back to suction side in pump 2 Water can pass through the...

Page 55: ...handle with open water regulator 1 Valve for water regulation is open 2 Non return valve is closing for opening to the water regulation valve for building up the pressure with open water regulator Th...

Page 56: ...lve is to make sure the unloader stem move slower after opening the spray handle If the stem moves too fast the ball at the end of the stem will close against its seat too fast and the pressure behind...

Page 57: ...Troubleshooting SM_MH 3M_4M Ver 1 2_May 2016 57 E MH 3M MH 4M...

Page 58: ...Troubleshooting SM_MH 3M_4M Ver 1 2_May 2016 58 E MH 3M MH 4M...

Page 59: ...d for trouble shooting For more information please read TSB PPW 2016 006 Nilfisk Service Tool Instructions MH 3M_4M Nilfisk Service Tool must be used for re setting the service light and changing the...

Page 60: ...ice door by turning the two quarter turns Pump seen through service opening Remove the U pin to dismount the water inlet con nection Remove screw for micro switch bracket Remove the U pin to dismount...

Page 61: ...ervice Repair 61 F MH 3M Pump Dismount the 3 cylinder head bolts Pull off the cylinder head Dismount the 4 bolts holding the cylinder block Dismount the cylinder block Dismount the bearing disc and be...

Page 62: ...block Use e g a Bahco Puller type 4521 N F Bahco puller not shown for puller is type 4524 G Oil seals must be installed by using punch 1210996 Check that the O ring in the midle of the cylinder block...

Page 63: ...alve seat stays in the cylinder head it can be pulled out with a Bahco puller Pressure and Suction valves disassembling Pull out the water seals and trust collars Use e g a Bahco Puller type 4521 N F...

Page 64: ...mble the outlet coupling and fitting Non return valve housing Spring and non return piston can be pulled up with a pair of pliers Non return components Regulator Safety Block disassembling Loosen and...

Page 65: ...Loosen unbloader valve Pull out the unloader valve Unloader disassembling 1 Counter nut 2 Adjustment screw 3 Housing 4 Lock pin 5 Lock ring for lock pin 6 Washer f spring 7 Spring 8 Valve cone housing...

Page 66: ...SM_MH 3M_4M Ver 1 2_May 2016 Service Repair 66 F MH 3M PumpTorque Settings...

Page 67: ...er and water inlet connections Use a small screwdriver for pulling out the pin for the water inlet connection Pull out the water inelt connection from the water inelt manifold Remove the 3 screws for...

Page 68: ...r head Remove the 3 secondary water seals if left on the pistons Remove the 2 screws one in each side for the Remove the Cylinder block Remove the screw which holds the wobble disc Use a screwdriver o...

Page 69: ...ble disc using a 16 mm bolt Remember to remove the braing track sitting in the Remove the 3 secondary water seals Remove the 3 thrust collars with an expandable puller Remove the 3 primary seasl with...

Page 70: ...e pressure vavles Remove the 3 pressure valves Remove the 3 pressure valves Pull up the 3 pressure valve seats Use a 5mm screw there are thrads inside the pressure valve Remove the 3 distance rings fo...

Page 71: ...nd make sure the components are assemb led as shown on the next 2 pictures Pull out the oil seals from the cylinder block using an expandable puller The curved edge A of the bearing tracks must be mou...

Page 72: ...SM_MH 3M_4M Ver 1 2_May 2016 Service Repair 72 F MH 4M pump 55 Nm 20 Nm 10 Nm 40 Nm Torque specificcations Bolt for wobble disc 20 Nm...

Page 73: ...Repair 73 F MH 4M pump 3 6 Automatic venting valve 7 Injector nozzle for control piston 9 Return valve for by pass water 12 By pass valve housing 17 Handle for water regulation 19 Plug for by pass val...

Page 74: ...Hose reel Caryfully install the back up ring pos 9 for the O ring pos 10 by rolling it onto the swivel Do NOT open the back up ringas shown above Lubricate the svivel with silicone grease Push in the...

Page 75: ...foot when removing boiler or rear wheels Support foot Support foot must be placed below the two fork lift symbols When the support foot is positioned plase your foot on the support foot as show above...

Page 76: ...the sensor Dismount the 2 screws for the flame sensor and the flame sensor holder to dismount the protection plate Dismount the fuel hose Push the red quick connecti on and pull out the fuel hose Pull...

Page 77: ...s are dismounted the heatiing coil including the inner boiler top can be lifted up It is recommended to replace the insulation when servicing the boiler Clean boiler inside for deposits Burner unit Bu...

Page 78: ...soot has build up on the heating coil pipes the heating coil must be dismounted and cleaned 2 All fuel filters fuel tank inlet filter fuel line filter fuel nozzle filter and fuel pump filter must be c...

Page 79: ...Repair 79 F Heating system Check and clean fuel filter in fuel tank inlet Replace fuel filter on fuel line Dismount the plug below the fuel outlet port Pull off the fuel filter from the plug and repl...

Page 80: ...ows and then pull bumper against you Remove screw for support pipe Remove the right wheel fuel tank lid pump outlet pipe and the side cabinet part Remove the 3 screws holding the side cabinet part To...

Page 81: ...the fuel tank is as far out as shown above the fuel hoses 2 and the fuel level sensor if installed must be dismounted before re moving the tank completely When installing the tap in fuel tank there i...

Page 82: ...or Ker osene A fuel pressure check will be a part of such an adjustment A check of air damper setting and oil pressure are also recommended when fuel nozzle fuel pump fan wheel or other fuel related c...

Page 83: ...ture 1 Mount the fuel pressure manometer on the fuel pump or on the pipeline between fuel pump and fuel nozzle 2 Start up the machine on max pressure and flow Switch on the heat boiler and turn to max...

Page 84: ...he centre of the chimney 7 Set the air damper until specified CO2 is obtained Be aware that it can take several minutes before stabiliz ing Setting air clockwise More air decreasing CO2 Counter clock...

Page 85: ...12 Turn off the heat switch and let the machine run for 1 min on cold mode and stop the machine 13 Demount the fuel pressure manometer and assemble the fuel pump and tube 14 If a hot water machine is...

Page 86: ...est gauge 5 The correct retaining pressure is shown in the data sheets in section B in this manual NOTE Retaining pressure is the pressure the pump reaches when the motor stops 1 The retaining pressur...

Page 87: ...n machine with full pressure and water volume water regulator closed Close the spray handle let the motor stop and read the retaining pressure on the test manometer The retaining pressure is adjusted...

Page 88: ...ll water volume water regulator closed with correct high pressure nozzle and read the output pressure on the test manometer Dismount the high pressure hose from the test manometer and start machine wi...

Page 89: ...tor and machine without pressure do the following to adjust the water regulator Turn gently the small brass shaft 1 counterclockwise until it JUST touches the surface of the plug 2 Push down the blue...

Page 90: ...SM_MH 3M_4M Ver 1 2_May 2016 Adjustment Test 90 G MH 3M 4M AntiStone valve Adjustment knob for AntiStone valve Adjustment knob for settings...

Page 91: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 91 H...

Page 92: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 92 H...

Page 93: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 93 H...

Page 94: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 94 H...

Page 95: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 95 H...

Page 96: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 96 H...

Page 97: ...Wiring diagrams SM_MH 3M_4M Ver 1 2_May 2016 97 H...

Page 98: ...ow fuse This is meant as a guideline for finding the component that is the root cause to a blown fuse Fuses Check the components in the order they are listed below Fuses Fuse Components to check for r...

Page 99: ...oot from boiler N A Testo 327 or similar com bustion gas analyzer Measurering CO2 value N A 16 mm Bolt Dismounting wobble disc NA5 2 pump 17246 Fuel pressure gauge Measurering fuel pressure 101221030...

Page 100: ...Notes 100 SM_MH 3M_4M Ver 1 2_May 2016...

Page 101: ...Nilfisk A S Industrivej 1 9650 Hadsund Denmark www nilfisk com...

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