Nilfisk-ALTO MC 3C Service Manual Download Page 2 | Manualshive

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SM MC 3C_ MC 4M Ver.1.0_March 2015

Preface

This service manual contains detailed description of the main repair work on the cold high
pressure washers

MC 3C & MC 4M

Repair work requires a suitable working place with the necessary water and power supply.

If operating errors are evident, draw the customers attention to the ”Operators Manual”.

A fault in the high pressure washer can have several causes as described in the section on
troubleshooting.

Refer to the illustrated ”Spare Parts Catalogue” during repairs. It shows the assembly position
and the sequence in which the individual components should be assembled.

See ”Technical Service Bulletin” (TSB) sheets. They include information on technical
modifications that have been made after this repair manual was made.

”Technical Service Bulletin” sheets are also valid as a supplement to the spare parts list until
publication of a new edition.

”Service Manual” and ”Technical Service Bulletin” should be available at the workshop, where
the repairs are carried out.

It is not permitted to give them to third parties.

Use original

Nilfisk-ALTO

spare parts only.

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Summary of Contents for MC 3C

Page 1: ...MC 3C MC 4M SERVICE MANUAL ...

Page 2: ...Refer to the illustrated Spare Parts Catalogue during repairs It shows the assembly position and the sequence in which the individual components should be assembled See Technical Service Bulletin TSB sheets They include information on technical modifications that have been made after this repair manual was made Technical Service Bulletin sheets are also valid as a supplement to the spare parts lis...

Page 3: ...A B C D E F G H I Special tools 69 Wiring diagrams 66 68 Adjustment Test 65 65 Service Repair 42 64 Troubleshooting 40 41 Function 38 39 Construction 34 37 Technical data 5 33 Safety instructions 4 ...

Page 4: ...p it readily available Only allow the high pressure cleaner to be used by persons who have been trained in its use and who have been explicitly aut horized to use it Repair work should be carried out by persons instructed in electrical installations or by trained electricians only Take the following ESD precautions before carrying out any repairs to the electronics Touch the earth conductor before...

Page 5: ... API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 3460 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0400 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SW...

Page 6: ...80W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water 25034 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOS...

Page 7: ...0W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HO...

Page 8: ... SAE 80W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN ...

Page 9: ... API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SW...

Page 10: ...e SAE 80W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN...

Page 11: ...pe Agip Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water 25045 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL ...

Page 12: ... 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 3380 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0435 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE...

Page 13: ...mm 0 Pump oil type Agip Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0435 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GU...

Page 14: ...il type Agip Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0435 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE ...

Page 15: ...0 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2800 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0435 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE S...

Page 16: ...ump oil type SAE 80W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2880 Electrical diagram no 71413 UNIT DATA Nozzle size water NT 0450 Max Inlet temp primed C 50 Max Inlet temp suction C 50 Max Inlet temp pressure fed C 60 Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL Primary ...

Page 17: ...m 1 Pump oil type SAE 80W 90 API GL 5 Pump oil amount L 0 42 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 2880 Electrical diagram no 71413 UNIT DATA Nozzle size water NT 0450 Max Inlet temp primed C 50 Max Inlet temp suction C 50 Max Inlet temp pressure fed C 60 Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL Pri...

Page 18: ...API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0530 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWI...

Page 19: ...ype Agip Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water 25035 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL...

Page 20: ...ype Agip Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water 25035 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL...

Page 21: ... SAE 80W 90 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0350 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN ...

Page 22: ...0 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1720 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE S...

Page 23: ...e SAE 80W 90 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1720 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN...

Page 24: ... API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SW...

Page 25: ... SAE 80W 90 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN ...

Page 26: ... API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0340 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SW...

Page 27: ...API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1700 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0400 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWI...

Page 28: ...p Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1700 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0400 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL Prim...

Page 29: ...0W 90 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water 25040 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE...

Page 30: ...90 API GL 5 Pump oil amount L 0 39 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1680 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE ...

Page 31: ... Rotra Pump oil amount ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE SWIVEL Prima...

Page 32: ... type Agip Rotra Pump oil amount 0 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE ...

Page 33: ... type Agip Rotra Pump oil amount 0 ELECTRIC Electric data Highvoltage HV test voltage kV 1 5 HV Insulation resistance 1 Earth circuit resistance 0 2 Pump revolutions 1450 Electrical diagram no 0 UNIT DATA Nozzle size water NT 0370 Max Inlet temp primed C 25 50 max 1 hour Max Inlet temp suction C 25 50 max 1 hour Max Inlet temp pressure fed C 60 40 C max 1h Gun Type ERGO 2000 STANDARD GUN W O HOSE ...

Page 34: ... OFF switch MC 3C variants 1 phase MC 3C 150 570 MC 3C 140 660 MC 3C 150 660 MC 3C 130 660 3 phase MC 3C 160 770 MC 3C 170 820 High pressure hose Hose Reel XT model Ergo 2000 gun holder Lance Space for 2 Lance type vary from model to model Model name explanation Example MC 3C 150 570 M Mid range C Cold water model 150 Pump pressure 570 Maximum water volume Qmax Electric Box Oil level sight ...

Page 35: ...00 gun Handle crank hose reel Water inlet Foam Sprayer MC 3C variants 1 phase MC 3C 150 570 MC 3C 140 660 MC 3C 150 660 MC 3C 130 660 3 phase MC 3C 160 770 MC 3C 170 820 Ergo 2000 gun holder Detergent container Model name explanation Example MC 3C 150 570 M Mid range C Cold water model 150 Pump pressure 570 Maximum water volume Qmax ...

Page 36: ...0 MC 3C 150 660XT 3 phase MC 3C 160 770 MC 3C 170 820 MC 3C 170 820 XT MC 4M variants 1 Phase MC 4M 140 620 MC 4M 100 770 MC 4M 160 620 MC 4M 150 620 MC 4M 140 620 3 Phase MC 4M 160 720 MC 4M 180 740 Some of the above listed models are available both with and without hose reel Model name explanation Example MC 3C 150 570 M Mid range C Cold water model 150 Pump pressure 570 Maximum water volume Qma...

Page 37: ...March 2015 37 MC 3C MC 4M Lid f oil container Oil container Micro switch Unloader Water outlet Motor NA3 pump Water inlet Motor NA4 pump Water inlet Lid f oil container Oil container Unloader Micro switch Water outlet conection for hose reel ...

Page 38: ...witch 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 piston is pushed upwards by the higher pressure the micro switch is activated opens and the motor stops When the motor stops the non return valve is pushed back into its seat and holds the cut off ...

Page 39: ...arted 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 micro switch is activated opens and the motor stops When the motor stops the non return valve is pushed back into its seat and holds the cut off pressure in the high pressure hose and also in the c...

Page 40: ...r inlet hose is too long or its cross section too small Lack of water caused by Blocked partly blocked water filter Lack of water because max permissible suction height has not been heeded Pump sucks in air suction mode Open water tap Use specified water inlet Hose Refer to Operating Manual Clean the water filter in the water connection Never work without water filter See technical data section B ...

Page 41: ...lead with correct cross section and length The motor switches off The overload protection has been activated due to overheating or overloading of the motor High pressure nozzle is dirty Check that the main voltage and the cleaner voltage are the same Switch off the cleaner and allow it to cool down Clean or change the high pressure nozzle Cleaner starts stops by itself Leakage on high pressure sid...

Page 42: ...lift off Access to oil drain plug through cabinet backside Loosen oil plug with a 17 mm box spanner Drain pump oil Tip machine forward before dismounting the oil plug Install 180 mm long pipe with 3 8 inch pipe threads in oil drain plug hole Place machine on backside over an oil drain container to drain oil from pump MC 3C MC 4M ...

Page 43: ... an 8mm open ring spanner Pull up the micro switch box Pull out the lock pin for the micro switch box with a pair of pliers Micro switch box and cylinder head bolts disassembling Disassemble the 3 cylinder head bolts with a 6 mm Allen key MC 3C Remove high pressure hose if XT model otherwise outlet male coupling ...

Page 44: ...ith a Phillips screwdriver Pull down the micro switch box Push out the lock pin for the micro switch box with a 3 mm Allen key Micro switch box and cylinder head bolts disassembling Micro switch box disassembled Disassemble the 3 cylinder head bolts with a 10 mm Allen key Cylinder head bolt disassembled MC 4M ...

Page 45: ...d and oil seals disassembling Lift up the cylinder head Disassemble the 4 cylinder block bolts with a 6 mm Allen key box spanner Lift the cylinder block up Pull out the 3 oil seals from the cylinder block Use e g a Bahco Puller type 4521 N F Bahco puller not shown for puller is type 4524 G MC 3C ...

Page 46: ...d and oil seals disassembling Lift up the cylinder head Disassemble the 4 cylinder block bolts with a 6 mm Allen key box spanner Disassemble the 3 spacers Pull out the 3 oil seals from the cylinder block Use e g a Bahco Puller type 4521 N F Bahco puller not shown for puller is type 4524 G MC 4M ...

Page 47: ...d bearing Dismount the wobble disc by loosen the screw in the center AND holding the wobble disc with puller arm 1206150 as shown on the above picture Wobble disc bearing and bearing track MC 3C Oil seals can be installed by using a 13 mm box spanner Check that the box spanner fits exactly on the oil seal Oil seals asassembly ...

Page 48: ...le disc from the motor shaft If not possible by hand use a stan dard puller Wobble disc bearing and bearing track MC 4M Oil seals must be installed by using punch 1210996 Check that the O ring in the midle of the cylinder block is placed correctly By assembly note that the pin of the spacer ring must be placed in the cylinder groove Oil seals asassembly ...

Page 49: ...e 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 Bahco puller not shown for puller is type 4524 G Trust colar and water seals pulled out with puller Trust collar and water seals Cylinder head and water seals disassembling MC 3C Pressure valves posi tioned under plugs ...

Page 50: ...ve 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 Bahco puller not shown for puller is type 4524 G Trust colar and water seals pulled out with puller Trust collar and water seals Cylinder head and water seals disassembling MC 4M ...

Page 51: ...tting for non return valve using a 22 mm open ring spanner Pull out the non return valve Non return valve disassembling MC 3C If needed non return valve can be pulled out with a 4 mm screw There are 4 mm threads in the end of the non return valve Non return valve components ...

Page 52: ...icro switch box using a 15 mm open ring spanner Disassemble piston spring MC 3C Pull out piston for micro switch with a pair of pliers Loosen the counter nut on the unloader Regulator Safety Block disassembling Disassemble the adjusting nut Pull out the spring with a pair of pliers ...

Page 53: ...s Disassemble the unloader piston and housing MC 3C Dismount the unloader piston using a 4 mm Allen key and a 10 mm open ring spanner Unloader components 1 Adjustment screw 2 Counter nut 3 Spring 4 Washer for spring 5 Piston 6 Piston guide 7 Valve cone Regulator Safety Block disassembling 1 2 3 4 5 6 7 ...

Page 54: ...Easy start valve components Disassemble Easy start valve with a 5 mm Allen key Easy start valve assembly only 1 Easy start valve 1 disassembling MC 4M Non return valve disassembling Disassemble the outlet coupling and fitting Non return valve housing MC 4M ...

Page 55: ...pring and non return piston can be pulled up with a pair of pliers Non return components Regulator Safety Block disassembling Loosen and dismount fitting f micro switch Use 17 mm open ting spanner Pull out piston for micro switch Loosen regulator safety block Pull out the regulator safety block ...

Page 56: ...air 56 MC 4M Regulator Safety Block 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 9 Valve cone 10 O ring Regulator Safety Block parts 3 4 5 6 7 8 9 2 1 10 ...

Page 57: ...F SM MC 3C_ MC 4M Ver 1 0_March 2015 Service Repair 57 Hose Reel MC 3C XT MC 4M XT ...

Page 58: ...4M Motor disasassembly Remove motor bracket Remove motor from chassis Remove rubber support from motor bracket Loosen motor bracket bolt before removing the black motor cover IMPORTANT There are 3 positions for the motor bracket bolt Positions are clearly marked on black motor cover ...

Page 59: ...r Motor bracket bolt slides in the special channel made in the stator cooling ribs Remove lock ring from rotor shaft Pull off motor fan Remove the 4 stay bolts with a 10 mm box spanner Loosen the N bearing cover from the stator with a screwdriver or similar Pull off the N bearing cover MC 3C 4M ...

Page 60: ...e N bearing gently with a man drel Remove D bearing cover from stator and push the cable into the D Bearing cover Remove the oil seal very gently with a large screwdriver or similar Make sure not to scratch the D bearing cover inside Remove the D bearing gently with a man drel MC 3C 4M ...

Page 61: ...ve two screws Torx 20 in the top of the backside cabinet MC 3C 4M Remove the 2 screws Torx 20 from the E box front cover Lift up and pull off the E box cover E box cover removed Lift up and pull out the E box The E box can be fixed see red arrows to the motor cover during service ...

Page 62: ...ter inlet filter Cleaning Maintenance Oil level Check Pump Oil Filling Pump oil filling SAE 80W 90 API GL 5 When the oil container is filled up tilt ma chine to the side as shown on the picture above When the oil in the oil container stop sin king raise the machine to upright possition and refill the oil container to the correct fil ling mark on the container Arrow in picture above pointing at oil...

Page 63: ...F SM MC 3C_ MC 4M Ver 1 0_March 2015 Service Repair 63 Torque Settings MC 3C ...

Page 64: ...F SM MC 3C_ MC 4M Ver 1 0_March 2015 Service Repair 64 Torque Settings MC 4M ...

Page 65: ...sure on the test 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 pressure is adjusted on the 2 unloader 3 Use a 3 mm Allen Key and a 10 mm open ring spanner 4 Loosen the counter nut with the 10 mm open ring spanner 5 Turn the Allen Key clockwise to increase a...

Page 66: ...H Wiring diagrams SM MC 3C_ MC 4M Ver 1 0_March 2015 66 MC 3C MC 4M 1 106420592A ...

Page 67: ...H Wiring diagrams SM MC 3C_ MC 4M Ver 1 0_March 2015 67 Unitor HPC 30 1 3C 150 660 220 1 60 16 1 106420596A ...

Page 68: ...H Wiring diagrams SM MC 3C_ MC 4M Ver 1 0_March 2015 68 MC 3C 160 770 400 3 50 EU 3 106420593A ...

Page 69: ...3C_ MC 4M Ver 1 0_March 2015 Part Number Description Remarks Special Tools 1206358 Test Pressure Gauge Adjustment retaining pressure Additional Materials 41455 Grease 15 C to 130 C Valve grease 1206150 Puller leg Wobble disc MC 3C removal ...

Page 70: ...70 SM MC 3C_ MC 4M Ver 1 0_March 2015 Notes ...

Page 71: ...Nilfisk ALTO Division of Nilfisk Advance A S Industrivej 1 9650 Hadsund Denmark www nilfisk alto com ...

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