Nilfisk-ALTO MC 3C Service Manual
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Nilfisk-ALTO MC 3C Service Manual

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MC 3C - MC 4M
SERVICE MANUAL

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Summary of Contents for Nilfisk-ALTO MC 3C

  • Page 1 MC 3C - MC 4M SERVICE MANUAL...
  • Page 2 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”.
  • Page 3 Safety instructions Technical data 5 -33 Construction 34-37 Function 38-39 Troubleshooting 40 -41 Service / Repair 42 -64 Adjustment / Test 65 -65 Wiring diagrams 66 -68 I. Special tools...

  • Page 4: Safety Instructions

    Safety instructions For your own safety Observe valid safety regulations for electrical equipment. In particular, observe the following regulations: IEC 60335-2-79 EN 60335-2-79 Additionally: Also see national regulations Before using the cleaner, always read the ”Operators Manual” and Repair work should be carried keep it readily available.

  • Page 5: Technical Data

    Technical data Parent item no:  Descrip on:  107146377  MC 3C‐130/660 220/1/60/15 EXPT  Service data Unit Value MC 3C-130/660 Model 107146377 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min...
  • Page 6 Technical data Parent item no:  Descrip on:  107146373  MC 3C‐140/570 230/1/50/13 UK  Service data Unit Value MC 3C-140/570 Model 107146373 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min...
  • Page 7 Technical data Parent item no:  Descrip on:  107146375  MC 3C‐140/660 230/1/50/16 EU  Service data Unit Value MC 3C-140/660 Model 107146375 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min...
  • Page 8 Technical data Parent item no:  Descrip on:  107146371  MC 3C‐150/570 230/1/50/13 XT UK  Service data Unit Value MC 3C-150/570 XT Model 107146371 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec...
  • Page 9 Technical data Parent item no:  Descrip on:  107146376  MC 3C‐150/660 230/1/50/16 EU  Service data Unit Value MC 3C-150/660 Model 107146376 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min...
  • Page 10 Technical data Parent item no:  Descrip on:  107146380  MC 3C‐150/660 230/1/50/16 XT EU  Service data Unit Value MC 3C-150/660 XT Model 107146380 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec...
  • Page 11 Technical data Parent item no:  Descrip on:  107146381  MC 3C‐160/770 400/3/50 EU  Service data Unit Value MC 3C-160/770 Model 107146381 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,8 Flow. Qiec...
  • Page 12 Technical data Parent item no:  Descrip on:  107146383  MC 3C‐170/820 220‐440/3/60 EXPT  Service data Unit Value MC 3C-170/820 Model 107146383 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,6 Flow. Qiec...
  • Page 13 Technical data Parent item no:  Descrip on:  107146385  MC 3C‐170/820 230‐400/3/50 XT NO  Service data Unit Value MC 3C-170/820 230-400/3/50 XT NO Model 107146385 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,3 Flow.
  • Page 14 Technical data Parent item no:  Descrip on:  107146384  MC 3C‐170/820 400/3/50  XT EU  Service data Unit Value MC 3C-170/820 Model 107146384 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,3 Flow. Qiec...
  • Page 15 Technical data Parent item no:  Descrip on:  107146382  MC 3C‐170/820 400/3/50 EU  Service data Unit Value MC 3C-170/820 Model 107146382 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,6 Flow. Qiec...
  • Page 16 Technical data Parent item no:  Descrip on:  107145840  MC 3C‐170/830 400/3/50 EU  Service data Unit Value MC 3C-170/830 Model 107145840 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,6 Flow. Qiec...
  • Page 17 Technical data Parent item no:  Descrip on:  107145841  MC 3C‐170/830 400/3/50 XT EU  Service data Unit Value MC 3C-170/830 XT Model 107145841 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,6 Flow. Qiec...
  • Page 18 Technical data Parent item no:  Descrip on:  107146398  MC 4M‐100/770 230/1/50/13 UK  Service data Unit Value MC 4M-100/770 Model 107146398 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 11,1 Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 19 Technical data Parent item no:  Descrip on:  107146395  MC 4M‐140/620 230/1/50/13 EU  Service data Unit Value MC 4M-140/620 Model 107146395 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 20 Technical data Parent item no:  Descrip on:  107146396  MC 4M‐140/620 230/1/50/13 UK  Service data Unit Value MC 4M-140/620 Model 107146396 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 21 Technical data Parent item no:  Descrip on:  107146399  MC 4M‐140/620 230/1/50/13 XT UK  Service data Unit Value MC 4M-140/620 XT Model 107146399 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 22 Technical data Parent item no:  Descrip on:  107146402  MC 4M‐150/620 220/1/60/15 EXPT  Service data Unit Value MC 4M-150/620 Model 107146402 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 23 Technical data Parent item no:  Descrip on:  107146413  MC 4M‐150/620 XT 220/1/60/15 EXPT  Service data Unit Value MC 4M-150/620 XT Model 107146413 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 24 Technical data Parent item no:  Descrip on:  107146400  MC 4M‐160/620 230/1/50/16 EU  Service data Unit Value MC 4M-160/620 Model 107146400 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 25 Technical data Parent item no:  Descrip on:  107146403  MC 4M‐160/620 230/1/50/16 XT EU  Service data Unit Value MC 4M-160/620 XT Model 107146403 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 26 Technical data Parent item no:  Descrip on:  107146401  MC 4M‐160/620 230/1/50/16 ZA  Service data Unit Value MC 4M-160/620 Model 107146401 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 27 Technical data Parent item no:  Descrip on:  107146408  MC 4M‐160/720 200/3/50 JP  Service data Unit Value MC 4M-160/720 Model 107146408 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 10,4 Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 28 Technical data Parent item no:  Descrip on:  107146409  MC 4M‐160/720 200/3/60 JP  Service data Unit Value MC 4M-160/720 Model 107146409 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 10,5 Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 29 Technical data Parent item no:  Descrip on:  107146404  MC 4M‐160/720 400/3/50 EU  Service data Unit Value MC 4M-160/720 Model 107146404 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 10,4 Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 30 Technical data Parent item no:  Descrip on:  107146407  MC 4M‐180/740 220‐440/3/60 EXPT  Service data Unit Value MC 4M-180/740 Model 107146407 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* 10,2 Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 31 Technical data Parent item no:  Descrip on:  107146406  MC 4M‐180/740 400/3/50 EU  Service data Unit Value MC 4M-180/740 Model 107146406 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed Pump type...
  • Page 32 Technical data Parent item no:  Descrip on:  107146410  MC 4M‐180/740 400/3/50 EU XT  Service data Unit Value MC 4M-180/740 XT Model 107146410 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 33 Technical data Parent item no:  Descrip on:  107146411  MC 4M‐180/740 400/3/50 NO XT  Service data Unit Value MC 4M-180/740 XT Model 107146411 Item no. TECHNICAL DATA PUMP: Pressure pump head @ Qiec Pressure pump outlet @ Qiec Pressure gun outlet @ Qiec Retaining pressure* Flow. Qiec l/min Suction height dry Suction height primed...
  • Page 34 Water inlet Lance holder bottom Model: MC 3C/4M XT 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; XT vs. Standard -Hose Reel -Hose lenght 15m...
  • Page 35 Foam Sprayer Detergent container Water inlet Model: MC 3C/4M XT 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; XT vs. Standard -Hose Reel -Hose lenght 15m - 4 in 1 Lance...
  • Page 36 Construction MC 3C variants: 1 phase: MC 3C-150/570 XT; MC3-140/570; MC 3C-140/660; MC 3C-150/660; MC 3C-130/660; 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;...
  • Page 37 Construction MC 3C Motor Lid f. oil container NA3 pump Oil container Micro switch Water inlet Unloader Water outlet MC 4M Motor Lid f. oil container NA4 pump Oil container Unloader Water inlet Water outlet conection for hose reel Micro switch...
  • Page 38 Function Schematic drawing 1 ~ The schematic drawing of the pump head below is made to get a better understanding of the function. NOTE ! In the schematic drawing of the pump head is shown a two-way easy start valve, which is the layout for all the single phase machines.
  • Page 39 Function Schematic drawing 3 ~ The schematic drawing of the pump head below is made to get a better understanding of the function. NOTE ! In the schematic drawing of the pump head is shown a two-way easy start valve, which is the layout for all the single phase machines.

  • Page 40: Troubleshooting

    Troubleshooting Fault Cause Remedy  Pressure drop - Air in the system. Vent the system by operating the spray gun several times at short intervals .If necessarily operate the cleaner for a short time without the high pressure hose connected. ...
  • Page 41 Troubleshooting Fault Cause Remedy  The main voltage is too low  Have the electrical When the cleaner is switched on the motor buzzer without or there is a phase failure connections checked. starting. (3 phase model).  The pump is blocked or ...
  • Page 42 Service / Repair MC 3C & MC 4M Cabinet front Front cabinet screws (quater turns) Pull cabinet forward and lift off Drain pump oil Loosen oil plug with a 17 mm box spanner Access to oil drain plug through cabinet backside Tip machine forward before dismounting the oil plug.
  • Page 43 Service / Repair MC 3C Micro switch box and cylinder head bolts disassembling Remove stainless steel bracket for micro Remove high pressure hose (if XT model), switch box with an 8mm open ring spanner otherwise outlet male coupling. Pull out the lock pin for the micro switch box...
  • Page 44 Service / Repair MC 4M Micro switch box and cylinder head bolts disassembling Push out the lock pin for the micro switch Remove stainless steel bracket for micro box with a 3 mm Allen key switch box with a Phillips screwdriver Pull down the micro switch box Micro switch box disassembled Disassemble the 3 cylinder head bolts with...
  • Page 45 Service / Repair MC 3C Cylinder head and oil seals disassembling Pull out the cylinder head Lift up the cylinder head Disassemble the 4 cylinder block bolts with Lift the cylinder block up. a 6 mm Allen key box spanner.
  • Page 46 Service / Repair MC 4M Cylinder head and oil seals disassembling Lift up the cylinder head Pull out the cylinder head Disassemble the 4 cylinder block bolts with Disassemble the 3 spacers. a 6 mm Allen key box spanner. Pull out the 3 oil seals from the cylinder block.
  • Page 47 Service / Repair MC 3C Oil seals asassembly Oil seals can be installed by using a 13 mm box spanner. Check that the box spanner fits exactly on the oil seal. Bearings and wobble disc disassembling Dismount the wobble disc by loosen the...
  • Page 48 Service / Repair MC 4M Oil seals asassembly Oil seals must be installed by using punch • By assembly note that the pin of the 1210996. Check that the O-ring in the midle spacer ring must be placed in the cylinder of the cylinder block is placed correctly.
  • Page 49 Service / Repair MC 3C Cylinder head and water seals disassembling Trust colar and water seals pulled out with Pull out the water seals and trust collars. puller. (Use e.g. a Bahco Puller type 4521 N-F. Bahco puller (not shown) for puller is type 4524 G) Trust collar and water seals.
  • Page 50 Service / Repair MC 4M Cylinder head and water seals disassembling Trust colar and water seals pulled out with Pull out the water seals and trust collars. puller. (Use e.g. a Bahco Puller type 4521 N-F. Bahco puller (not shown) for puller is type 4524 G) Trust collar and water seals.
  • Page 51 Service / Repair MC 3C Non-return valve disassembling Pull out the non-return valve. Disassemble the fitting for non-return valve using a 22 mm open ring spanner. If needed non-return valve can be pulled out Non-return valve components. with a 4 mm screw. There are 4 mm threads in the end of the non-return valve.
  • Page 52 Service / Repair MC 3C Regulator Safety Block disassembling Disassemble piston spring. Disassemble fitting for micro switch box using a 15 mm open ring spanner. Pull out piston for micro switch with a pair of Loosen the counter nut on the unloader.
  • Page 53 Service / Repair MC 3C Regulator Safety Block disassembling Disassemble the unloader piston and Pull out the spring washer with a pair of housing. pliers Dismount the unloader piston using a 4 mm Unloader components. Allen key and a 10 mm open ring spanner.
  • Page 54 Service / Repair MC 4M Easy start valve (1~) disassembling Disassemble Easy start valve with a 5 mm Easy start valve assembly—only 1~ Allen key Easy start valve components MC 4M Non-return valve disassembling Disassemble the outlet coupling and fitting Non-return valve housing SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 55 Service / Repair MC 4M Non-return valve disassembling Spring and non-return piston can be pulled Non-return components. up with a pair of pliers. Regulator Safety Block disassembling Loosen and dismount fitting f/micro switch. Pull out piston for micro switch. Use 17 mm open ting spanner Loosen regulator safety block Pull out the regulator safety block SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 56 Service / Repair MC 4M Regulator Safety Block disassembling Counter nut Adjustment screw Housing Lock pin Lock ring for lock pin Washer f/spring Spring Valve cone housing Valve cone 10. O-ring Regulator Safety Block parts SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 57 Service / Repair MC 3C XT & MC 4M XT Hose Reel SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 58 Service / Repair MC 3C 4M Motor disasassembly Remove motor bracket Remove cable holder Remove rubber support from motor bracket Remove motor from chassis Loosen motor bracket bolt before removing IMPORTANT: There are 3 positions for the the black motor cover motor bracket bolt.
  • Page 59 Service / Repair MC 3C 4M Motor disasassembly Motor bracket bolt slides in the special Pull off motor cover. 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...
  • Page 60 Service / Repair MC 3C 4M Motor disasassembly Remove the N-bearing gently with a man- Remove D-bearing cover from stator and drel. push the cable into the D-Bearing cover. Remove the oil seal very gently with a large Remove the D-bearing gently with a man- screwdriver or similar.
  • Page 61 Service / Repair MC 3C 4M E-Box disasassembly Remove two screws (Torx 20) in the top of Remove the 2 screws (Torx 20) from the E- the backside cabinet. box front cover Lift up and pull off the E-box cover E-box cover removed Lift up and pull out the E-box.
  • Page 62 Service / Repair Maintenance Water inlet filter - Cleaning Oil level Check First time after 50 Every 200 Maintenance Plan Weekly operating hours operating hours Cleaning water inlet filter Checking pump oil level Changing pump oil Pump Oil Filling When the oil container is filled up, tilt ma- Pump oil filling.
  • Page 63 Service / Repair Torque Settings MC 3C SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 64 Service / Repair Torque Settings MC 4M SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 65 Adjustment / Test Adjustment of the retaining pressure Check of retaining pressure Adjustment of retaining pressure MC 3C Install test pressure gauge 1206358 between machine outlet and the high pressure hose. Open the valve on the test gauge completely Start machine and run with full pressure.

  • Page 66: Wiring Diagrams

    Wiring diagrams MC 3C MC 4M 1 ~ 106420592A SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 67 Wiring diagrams Unitor HPC 30/1 3C 150/660 220/1/60/16 1 ~ 106420596A SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 68 Wiring diagrams MC 3C—160/770 400/3/50 EU 3 ~ 106420593A SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 69 Special Tools / Spare Parts Part Number Description Remarks Special Tools 1206358 Test Pressure Gauge Adjustment retaining pressure 1206150 Puller leg Wobble disc MC 3C removal Additional Materials 41455 Grease (-15 C to +130 C) Valve grease SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 70 Notes SM MC 3C_ MC 4M Ver.1.0_March 2015...
  • Page 71 Nilfisk - ALTO Division of Nilfisk - Advance A/S Industrivej 1 9650 Hadsund Denmark www.nilfisk-alto.com...

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