Possible causes for no water during operation despite the purge working and no error codes could include:
1. Clogged or Blocked Water Lines – Debris or buildup may be obstructing water flow.
2. Faulty or Disconnected Solenoid Valve – The water solenoid may not be opening properly.
3. Low or Empty Solution Tank – Ensure the solution tank is filled.
4. Kinked or Damaged Hoses – Hoses delivering water may be pinched or damaged.
5. Incorrect Water Flow Settings – Check that the water flow control is properly adjusted.

Inspect these components to identify and resolve the issue.

This answer is automatically generated

Summary of Contents for Nilfisk-Advance SC6500 40C

Page 1: Service Manual
SC6500™ Service Manual Advance Model Numbers: 56414010 SC6500 40C 56414016 SC6500 45D 56414011 SC6500 40C ECOFLEX 56414017 SC6500 45D ECOFLEX 56414012 SC6500 40D 56414018 SC6500 48C 56414013 SC6500 40D ECOFLEX 56414019 SC6500 48C ECOFLEX 56414014 SC6500 45C 56414020 SC6500 48D...
Page 2: Table Of Contents
Service Manual – SC6500 Contents ™ Contents Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General Information General Machine Description .
Page 3 Service Manual – SC6500 Contents ™ Normal (Light) Scrub Setting Adjustment . . . . . . . . . . . . . . . . . . . . . . . 37 Heavy Scrub Setting Adjustment .
Page 4 Service Manual – SC6500 Contents ™ X59A Telematics Connector Jumper . . . . . . . . . . . . . . . . . . . . . . . . 73 X60 (Deutsch DTM04-6P) Connects to X61 .
Page 5 Service Manual – SC6500 Contents ™ Cylindrical Scrub System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . 103 Circuit Description .
Page 6 Service Manual – SC6500 Contents ™ Solution Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Solution Manifold (disc decks only) .
Page 7 Service Manual – SC6500 Contents ™ Shop Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 Squeegee Actuator Motor .
Page 8 Service Manual – SC6500 Contents ™ Fault Code Table (Troubleshooting Chart) . . . . . . . . . . . . . . . . . . . . . . 190 Troubleshooting Chart .
Page 9: General Information
The manuals listed below can be found on Advance’s electronic supported databases. They are: • Advance Dealer Customer Zone • EzParts service / parts CD-ROM • Nilfisk-Advance website: www.nilfisk-advance.com Manuals • Parts List - Form Number 56042608 • Instructions for Use - Form Number 56091095 (English, Spanish. Portugese, French)
Page 10: Parts And Service
Service Manual – SC6500 General Information ™ Parts and Service Repairs should be performed by an Authorized Nilfisk-Advance Service Center, which employs factory- trained service personnel and maintains an inventory of Nilfisk-Advance original replacement parts and accessories. Nameplate The Model Number and Serial Number of your machine are shown on the machine nameplate.
Page 11: Towing
Service Manual – SC6500 General Information ™ Towing Caution! If the machine must be towed or pushed, make sure the Master On/Off Key Switch is in the Off position. Do not move the machine faster than a normal walking pace (2-3 mph, 3-5 kph) and for short distances only.
Page 12 Service Manual – SC6500 General Information ™ • Turn the key switch off (O) and disconnect the batteries before servicing electrical components. • Never work under a machine without safety blocks or stands to support the machine. • Do not dispense flammable cleaning agents, operate the machine on or near these agents, or operate in areas where flammable liquids exist.
Page 13: Emergency-Stop Switch/Battery Disconnect
Service Manual – SC6500 General Information ™ • Do not use on surfaces having a gradient exceeding that marked on the machine. • All doors and covers are to be positioned as indicated in the instruction manual before using the machine. Caution! Do not pressure-wash the operator control panel, circuit breaker panel or any electrical areas of the machine.
Page 14: Technical Specifications (As Installed And Tested On The Unit)
Service Manual – SC6500 General Information ™ Technical Specifications (As Installed and Tested On The Unit) Advance Brand SC6500 Models Model (with and without EcoFlex) Model No. 56414010 56414014 56414018 56414011 56414015 56414019 56414012 56414016 56414020 56414013 56414017 56414021 Voltage, Batteries Battery Capacity (max) Protection Grade IPX3...
Page 15 Service Manual – SC6500 General Information ™ Model (with and without EcoFlex) Model No. 56414010 56414014 56414018 56414011 56414015 56414019 56414012 56414016 56414020 56414013 56414017 56414021 Solution Tank Capacity Gallon / L 70 / 265 Recovery Tank Capacity Gallon / L 70 / 265 Transport Speed (Fwd.
Page 16: Nilfisk Brand Sc6500 Models
Service Manual – SC6500 General Information ™ **Transportation Weight: Standard machine without options, empty solution and recovery tanks, with batteries installed and no operator. Nilfisk Brand SC6500 Models 1100C 1300C Model (with and without EcoFlex) 1100D 1300D 56414023 56414025 Model No 56414022 56414024 Voltage, Batteries...
Page 17 Service Manual – SC6500 General Information ™ 1100C 1300C Model (with and without EcoFlex) 1100D 1300D 56414023 56414025 Model No 56414022 56414024 Battery Compartment Size (approximate) Height (maximum) inch / cm 19 / 48.2 Width (maximum) inch / cm 20 / 50.8 Length (maximum) inch / cm 31.75 / 80.6...
Page 18: Dimensions
Service Manual – SC6500 General Information ™ Dimensions Machine Width at Rollers Width with Squeegee TOP VIEW 58.5 (148.6 cm) 73.5 (187 cm) SIDE VIEW...
Page 19: General Machine Overview
Service Manual – SC6500 General Information ™ General Machine Overview Major Machine Components Vacuum Motor Cover and Recovery Operator’s Filter Tank Lid Seat Adjustment Lever Solution Tank Fill Cover Control Operator’s Panel Seat Battery Compartment (underneath recovery tank) Circuit Breakers Machine Battery Connector...
Page 20 Service Manual – SC6500 General Information ™ Recovery Tank Cover Assembly Ball Float Cage Squeegee Vacuum Hose Recovery Tank Drain Hose Squeegee Solution Height Filter Adjust Knob Squeegee Tilt Adjust Knob Hopper (cylindrical models Squeegee only) Assembly Squeegee Solution Height Shutoff Adjust Knob Valve...
Page 21: Control Panel
Service Manual – SC6500 General Information ™ Control Panel Switch and Button Functions The controls on your rider scrubber were designed with one-touch operation in mind. For single-pass scrubbing, the user can simply depress one switch and all systems on will be activated. For most single-pass scrubbing operations, the operator should only need to use the middle switches on the control panel.
Page 22 Service Manual – SC6500 General Information ™ ◦ If the direction is forward, the solution and detergent flow will also start automatically. ◦ If the direction is reverse, the solution and detergent flow will be stopped and the squeegee will be raised just enough to clear the floor surface.
Page 23 Service Manual – SC6500 General Information ™ – If the solution system is off, the detergent pump will not turn on. • – functions as follows: Vacuum/Wand Switch – If the machine is in the Auto Scrub mode, pressing this switch once will raise the squeegee. The vacuum motors will run for a short time delay, then shut off.
Page 24: Control Panel Indicators
Service Manual – SC6500 General Information ™ – In EcoFlex Mode 2, the minimum detergent concentration is displayed as a percent.. Pressing the ™ in Mode 2 will do the following: Burst of Power Button ◦ The detergent ratio will change to the maximum concentration programmed percentage. (Also refer to the section.) Solution System/Maintenance and Adjustments/To Program the Detergent Ratio...
Page 25 Service Manual – SC6500 General Information ™ • Scrub On/Scrub Mode Select Indicator – The left side indicator will light when the normal scrub mode is selected. – The right side indicator will light when the heavy scrub mode is selected. –...
Page 26: Control Panel Display
Service Manual – SC6500 General Information ™ – The indicator will be off when the scrub system is switched off and the brooms are in the raised position. • EcoFlex Indicator: – The (green) indicator will be on when the EcoFlex low-concentration detergent mode is enabled.
Page 27: Circuit Breakers
Service Manual – SC6500 General Information ™ Circuit Breakers The machine circuit breakers are located on the panel to the left of the Operator seat. General Maintenance Maintenance After Use When finished scrubbing, press the Scrub Off Switch. This will automatically raise the scrub deck and squeegee, and switch off the solution, detergent and vacuum systems.
Page 28: Maintenance Schedule
Service Manual – SC6500 General Information ™ d. Inspect the for wear or damage. Solution Tank Drain Hose Recovery Tank Drain Hose Vacuum Hose Replace the if kinked or damaged. Remove the brushes or pad holders. Rinse the brushes or pads in warm water and hang up to dry. Remove the squeegee, rinse it with warm water, then reinstall.
Page 29: Machine Lubrication
Service Manual – SC6500 General Information ™ Machine Lubrication Once a month: • Steering Chain • Pump a small amount of grease into each grease • Squeegee mount angle adjustment knob threads fitting on the machine as shown until grease seeps out around the bearings.
Page 30: Pm Check List - Sc6500
Service Manual – SC6500 General Information ™ PM Check List - SC6500 Defect Code needs adjustment Customer _________________________________________________________ binding Address ___________________________________________________________ dirty or contaminated damaged, bent or torn City ____________________________ ST _______________ Zip____________ leaks Model _____________ Serial ______________________ Hours _____________ missing worn out Operational Inspection Items...
Page 31 Visual Inspection Items Comments Defect Codes Does (Circult) Work Scrub Brushes, check for wear and rotate A B D W Scrub Brush Motor(s) and disc machine Carbon Brushes B L W gearboxes Scrub Brush Drive Belt, wear (cylindrical 1000 hours then A D W only) every 500 hours...
Page 32: Chassis System
Service Manual – SC6500 Chassis System ™ Chassis System Major Chassis Components 45 in / 48in / 1300mm models only...
Page 33: Control System
Service Manual – SC6500 Control System ™ Control System Functional Description Overview The control system consists of the A2 Control Board Assembly, the A3 Switch/Display Panel Assembly and associated sensors and circuitry. A2 Control Board Assembly , sometimes referred to the A2 Control Board Assembly main controller, communicates with the Curtis A1 Speed...
Page 34: A3 Switch/Display Panel Assembly
Service Manual – SC6500 Control System ™ A3 Switch/Display Panel Assembly The A3 Switch/Display Panel Assembly is the user interface that includes the various system switches and buttons, and the control panel display. The A3 Switch/ Display Panel Assembly sends the operator inputs via a CAN BUS to the A2 Control Board Assembly.
Page 35: To Select The Battery Used In The Machine
Service Manual – SC6500 Control System ™ To Select the Battery Used in the Machine Note that the factory default is Standard (LVC = 31V) Turn the key switch off. Press and hold the scrub off switch. While holding the scrub off switch, turn the key switch on. Continue to hold the scrub off switch until the Scrub Off LED indicator turns on.
Page 36: To Display The Control Board Revision Level
Service Manual – SC6500 Control System ™ To Display the Control Board Revision Level Turn the key switch off. Press and hold both the scrub off switch and traction control switch. While holding both switches, turn the key switch on. Continue to hold both switches until the scrub off and traction control indicators light.
Page 37: Normal (Light) Scrub Setting Adjustment
Service Manual – SC6500 Control System ™ Release both switches. The display will now show a clock icon in the upper left corner with a number indicating the scrub deck down time period. Press the scrub on switch to increment the time period. Each press of the switch increments the scrub deck down time 0.1 seconds.
Page 38: Heavy Scrub Setting Adjustment
Service Manual – SC6500 Control System ™ Heavy Scrub Setting Adjustment Note that the factory default settings for the heavy scrub setting are: Scrub pressure – two bars, Solution flow rate – two bars. The scrub pressure and solution flow rate for the heavy scrub setting can be programmed to better suit a particular application.
Page 39: Scrub Speed Switch Lockout
Service Manual – SC6500 Control System ™ While holding both switches, turn the key switch on. Continue to hold both switches until the vacuum/wand indicator turns on, and the normal and heavy scrub indicators blink. Release both switches. The display will now show a scrub icon (either disc or cylindrical) with the current scrub pressure setting.
Page 40: Detergent System Selection Mode
Service Manual – SC6500 Control System ™ Detergent System Selection Mode Turn the key switch off. Press and hold the scrub off switch and the detergent switch. While holding both switches, turn the key switch on. Continue to hold both switches until both switch indicators turn on. Release both switches.
Page 41: Recovery Tank Full Detection Enable/Disable
Service Manual – SC6500 Control System ™ Release both switches. The vacuum/wand indictor will flash. The control panel display will now indicate the vacuum motor setting. Press the vacuum/wand switch to toggle between for a single vacuum motor or VACUUM - SINGLE for two vacuum motors.
Page 42: Indicator Led Intensity Selection Option
Service Manual – SC6500 Control System ™ Press the scrub off switch to save the setting and display the key switch icon. Turn the key switch off. The new setting will be saved until changed again. Indicator LED Intensity Selection Option Note that the factory default setting for the indicator LED intensity is normal.
Page 43: Side Broom Function
Service Manual – SC6500 Control System ™ Side Broom Function Turn the key switch off. Press and hold the side broom on/down switch. While holding the switch, turn the key switch on. Continue to hold the switch until the side broom on/down indicator turns on. Release the switch.
Page 44: Display Mode Selection
Service Manual – SC6500 Control System ™ Display Mode Selection Turn the key switch off. Press and hold the detergent switch and EcoFlex button. ™ While holding the detergent switch and EcoFlex button, turn the key switch on. ™ Continue to hold the button and switch for two seconds until the EcoFlex and detergent system ™...
Page 45: Control Panel Switch And Button Functions
Service Manual – SC6500 Control System ™ – The control panel display will read when the operator foot pedal is depressed in the reverse REVERSE direction to activate its reverse drive mode functions. Control Panel Switch and Button Functions • –...
Page 46: Troubleshooting
Service Manual – SC6500 Control System ™ – Pressing the switch a third time will switch off the side broom motors and switch on the actuator to raise the side brooms. The side broom on/down indicator will light as the actuator is running. Once the side brooms reach the up position, the side broom on/down indicator will blink.
Page 47: Error Codes
Service Manual – SC6500 Control System ™ Error Codes Display Error/Fault Description Correction Code Scrub deck sense R2 resistor fault A fault will occur if scrub deck sensor resistor is unplugged or damaged. Check the resistor wiring for an open and substitute a new resistor and test scrub deck for correct operation.
Page 48 Service Manual – SC6500 Control System ™ Display Error/Fault Description Correction Code Vacuum motor overload 1. Check for debris in the vacuum motor(s). 2. Check for worn carbon brushes - replace brushes. Normal current load for one motor is 16-20 amps. Normal current load for 3.
Page 49 Service Manual – SC6500 Control System ™ Display Error/Fault Description Correction Code Back-up alarm overload 1. Check for a back-up alarm wiring problem or short circuit* (wire colors: positive ORN/BRN; negative Specifications: BLU/WHT). 2. Disconnect the back-up alarm and test to see if the •...
Page 50 Service Manual – SC6500 Control System ™ Display Error/Fault Description Correction Code Right brush motor contactor coil 1. Disconnect the coil wiring (wire colors VIO and short to ground YEL/BLU) and check to see if the code disappears. − If the code disappears, replace the brush contactor. −...
Page 51 Service Manual – SC6500 Control System ™ Display Error/Fault Description Correction Code Solution solenoid short to ground 1. Disconnect the solenoid coil wiring (wire colors VIO and YEL/GRN) and check to see if the code disappears. − If the code disappears, replace the solenoid valve. −...
Page 52 Service Manual – SC6500 Control System ™ Display Error/Fault Description Correction Code Back-up alarm open 1. Use an ohmmeter to check for an open circuit in the back-up alarm and its wiring (wire colors ORN/ BRN and BLU/WHT). If defective, repair or replace. 2.
Page 53: Removal And Installation
Service Manual – SC6500 Control System ™ Removal and Installation Warning! Before removing or reinstalling any machine components, disconnect the battery pack by pushing in the emergency-stop switch/battery disconnect, and make sure the parking brake is engaged. A2 Control Board Assembly Remove the electrical panel cover assembly (located to the left of the Screw (5)
Page 54: Specifications
Service Manual – SC6500 Control System ™ Specifications Scrub Pressure and Current Load (Amps) Specifications Scrub Mode Scrub Deck Type Pressure Indicator Disc 40” Cyl. 40” Disc 45”/48” Cyl. 45”/48” Normal Scrub 1 bar (#1) 40 amps 35 amps 50 amps 35 amps Heavy Scrub 2 bars (#2)
Page 55: I/O Table With Shop Measurements
Service Manual – SC6500 ™ Control System I/O Table with Shop Measurements A2 Control Board Assembly Nominal Wire ID/ Signal Reference Acceptable Designation Pin ID Description Value (when Measured Comments Color Characteristics Range activated) Complex pulsed PWM signal Detergent see comment Output J1-1 BLU/GRA...
Page 56 Service Manual – SC6500 ™ Control System Nominal Wire ID/ Signal Reference Acceptable Designation Pin ID Description Value (when Measured Comments Color Characteristics Range activated) 0 - 1V Speed Control - 0V (reverse), (reverse), 33.4V N or FWD Input J1-12 YEL/RED Voltage B- (ground)
Page 57 Service Manual – SC6500 ™ Control System Nominal Wire ID/ Signal Reference Acceptable Designation Pin ID Description Value (when Measured Comments Color Characteristics Range activated) .07 - .12V Recovery Tank Full voltage (Single Vac. .10V (Single = .083V (Single Vacuum Motor) Vacuum Motor Vac)
Page 58 Service Manual – SC6500 ™ Control System Nominal Wire ID/ Signal Reference Acceptable Designation Pin ID Description Value (when Measured Comments Color Characteristics Range activated) Speed Control - 18.6V Traction on Output J2-20 BLK/WHT Voltage 0 or 36V B- (ground) Mode Sel 2 0.03V Traction off...
Page 59: Electrical System
Service Manual – SC6500 Electrical System ™ Electrical System The electrical system chapter contains information on the battery and electrical components which are foundational such as circuit protection, wiring harnesses and electrical items that do not have a more clear home in another chapter.
Page 60 Service Manual – SC6500 Electrical System ™ Note: The following table represents how many “bars” are displayed in the battery indicator icon based on the actual battery voltage. Battery Indicator Standard Alternate 5 vertical indicator bars 36.1+ 36.1+ 4 vertical indicator bars 35.5-36.1 35.5-36.1 3 vertical indicator bars...
Page 61: Component Locations
Service Manual – SC6500 Electrical System ™ Component Locations • F1 Circuit Breaker, 3 Amp (Control Circuit) • K3 Contactor, Center Brush (45”/48” disk and all cyl.) • F2 Circuit Breaker, 15 Amp (Auxiliary Circuit) • K4 Contactor, Left Brush (45”/48” disk only) •...
Page 62 Service Manual – SC6500 Electrical System ™ S3 Battery Interlock Switch S2 Seat Switch K1 Vacuum K5 Auxiliary K2 Right Brush K3 Center K6 Side Brooms Brush K4 Left Brush K7 Main H4 Horn Solution Filter...
Page 63: Battery Location
Service Manual – SC6500 Electrical System ™ Battery Location are located in the battery Batteries compartment behind the operator seat and underneath the recovery tank. Battery (6) Battery is mounted on the Disconnect Battery Disconnect right side of the operator seat. Battery Disconnect...
Page 64: Connector Pin-Outs
Service Manual – SC6500 Electrical System ™ Connector Pin-Outs J1 Connects to A2 Control Board Pin No. Wire ID BLU/GRA 18-1 BRN/BLU 18-1 GRN/BLU 18-1 ORN/RED 18-1 GRN 18-2 TAN/BRN 18-1 BLK/GRA 18-1 ORN 18-3 ORN/BRA 18-1 BLK 16-3 RED/WHT 18-1 YEL/RED 18-1 GRA 18-1 BLK 16-4...
Page 65: J2 Connects To A2 Control Board
Service Manual – SC6500 Electrical System ™ J2 Connects to A2 Control Board Pin No. Wire ID WHT/GRN 18-1 BRN 18-1 ORN/BLU 18-1 ORN/BLK 18-1 YEL/GRA 18-1 RED/BLK 18-1 GRN/ORN 18-1 GRA/VIO 18-1 BLU/BRN 18-1 BLK 16-1 BLK 16-2 BRN/BLK 18-1 GRN/WHT 18-1 VIO/YEL 18-1 ORN/BRN 18-1...
Page 66: X6 Connects To A1 Speed Controller
Service Manual – SC6500 Electrical System ™ X6 Connects to A1 Speed Controller Pin No. Wire ID ORN/RED YEL/RED RED/WHT BLK/YEL BLK/PINK TAN/RED BLU/BLK BLK/WHT VIO/BLK BRN/RED WHT/BLK VIO/WHT PINK/RED WHT/ORN BLU/GRN PINK/WHT PINK/BLU...
Page 67: X7 Connects To Drive Motor
Service Manual – SC6500 Electrical System ™ X7 Connects to Drive Motor Pin No. Wire ID PNK-RED W006 PNK-BLU W005 BLK-PNK W004 TAN-RED W003 PNK-WHT W002 BLK-PNK W001 X8 Connector for Curtis Programmer Pin No. Wire ID BLU/GRA 18-1 BLK/PINK 18-6 WHT/ORN 18-1 VIO/WHT 18-1 Connects to S3 Battery Interlock Switch X9 if equipped.
Page 68: X12 Connects To H2 Flashing Lamp X11
Service Manual – SC6500 Electrical System ™ X12 Connects to H2 Flashing Lamp X11 Pin No. Wire ID BLK 18-7 ORN 18-6 X13 connects to M12 Solution Control Pump X14 Pin No. Wire ID VIO 18-13 BLU/ORN 18-1 X16 Connects to L1 Solution Solenoid Valve X15 Pin No.
Page 69: X20 Connects To M3 Squeegee Actuator X19
Service Manual – SC6500 Electrical System ™ X18 Connects to M2 Brush Actuator X17 Pin No. Wire ID RED/BLK 18-1 YEL/GRA 18-1 X20 Connects to M3 Squeegee Actuator X19 Pin No. Wire ID WHT/GRN 18-1 BLU/BRN 18-1 X22 Connects to M4 Side Broom Actuator X21 Pin No.
Page 70: X29 Connects To M7 Left Side Broom Motor X27
Service Manual – SC6500 Electrical System ™ X29 Connects to M7 Left Side Broom Motor X27 Pin No. Wire ID BLK 18-3 WHT/RED 18-1 X30 Connects to M8 Right Side Broom Motor X28 Pin No. Wire ID BLK 18-5 WHT/RED 18-2 Pin No.
Page 71: X41 Connects To R2 Scrub Deck Sensing Resistor X40
Service Manual – SC6500 Electrical System ™ X41 Connects to R2 Scrub Deck Sensing Resistor X40 Pin No. Wire ID GRN/WHT 18-1 ORN/BLK 18-1 X43 Connects to S5 Solution Tank Float Switch X42 Pin No. Wire ID VIO/YEL 18-1 BLK 18-2 X49 Connects to X48 Connector of Vacuum Motor Wiring Harness Pin No.
Page 72: X51
Service Manual – SC6500 Electrical System ™ Connector, Battery Interlock Switch Jumper (used when there is not an optional interlock switch) Pin No. Wire ID BLK 18-8 BLK 18-8 X55 Connects to M15 Accessory Pump (Optional) X54 Pin No. Wire ID VIO 18-15 BLK 18-11 X59 Connects to Telematics Connector Jumper X59A...
Page 73: X59A Telematics Connector Jumper
Service Manual – SC6500 Electrical System ™ X59A Telematics Connector Jumper Pin No. Wire ID BLK 18-13 BLK 18-13 X60 (Deutsch DTM04-6P) Connects to X61 Pin No. Wire ID PNK-RED W006 PNK-BLU W005 BLK-PNK W004 TAN-RED W003 PNK-WHT W002 BLK-PNK W001 X61 (Deutsch DT M06-6s)Connects to X60 Pin No.
Page 74: Maintenance And Adjustments
Service Manual – SC6500 Electrical System ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off and the key is removed from the machine. Wet-cell Battery Maintenance Correct maintenance of electric vehicle batteries can greatly extend their life. Well-maintained batteries may last up to three years, but failure after one year is common if maintenance has been inadequate.
Page 75: To Charge The Batteries
Service Manual – SC6500 Electrical System ™ To Charge the Batteries Disconnect the machine battery connector. Open the side access panel and push the connector from the charger into the battery connector. Follow the instructions on the battery charger. After charging the batteries, check the fluid level in all battery cells. Add distilled water if necessary to bring the fluid level up to the bottom of the filler tubes.
Page 76: Troubleshooting
Service Manual – SC6500 Electrical System ™ Troubleshooting Battery Testing A battery problem is usually recognized by the machine operator as a decrease in the machine’s running time. This condition is usually caused by one or more “dead cells” in the battery system – that is, one or more cells that are putting out less voltage than the other cells.
Page 77: Removal And Installation
Service Manual – SC6500 Electrical System ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off and the key is removed from the machine. To Install the Batteries Warning! • Use extreme caution when working with batteries. Sulfuric acid in batteries can cause severe injury if allowed to contact the skin or eyes.
Page 78 Service Manual – SC6500 Electrical System ™ Carefully tighten the nut in each battery terminal until the terminal will not turn. Do not overtighten the terminals or they will be very difficult to remove for future service. Coat the terminals with spray-on battery terminal coating (available at most auto parts stores). Put one of the black rubber boots over each of the terminals and connect the Battery Disconnect...
Page 79: Specifications
Service Manual – SC6500 Electrical System ™ Specifications Component Specifications Use a combination of multiple 2-volt cell units to construct a 36-volt DC battery pack system. Wet Cell Batteries Advance-recommended battery pack capacity is a 395 AH @ 20 Hour Rate deep cycle battery system.
Page 80: Wiring Diagram Tips
Service Manual – SC6500 Electrical System ™ Wiring Diagram Tips Wiring diagrams show how electrical components are connected together and to a large degree “how things work”. They do not show where things are located. Here are some tips when using these diagrams. Wiring diagrams may have multiple pages or sheets.
Page 81 Service Manual – SC6500 Electrical System ™ Typically relays (and contactors) are “split up” so that the relay winding is separated from the contacts. The “control” side of the relay is shown in one location and the “load” side of the relay is shown in another location.
Page 82: Wiring Diagram Pn 56414095 Rev C Sheet 1 Of 3
Wiring Diagram PN 56414095 REV C Sheet 1 of 3 CONFIDENTIAL THIS DRAWING AND THE DESIGN REPRESENTED HEREON IS THE PROPERTY OF NILFISK-ADVANCE, INC., PLYMOUTH, MINNESOTA AND IT HAS BEEN ISSUED WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRO- DUCED NOR COPIED NOR USED FOR ANY PURPOSE OTHER THAN FOR WHICH IT WAS ISSUED AND RECIPIENT AGREES TO RETURN IT UPON REQUEST.
Page 83: Wiring Diagram Pn 56414095 Rev C Sheet 2 Of 3
Wiring Diagram PN 56414095 REV C Sheet 2 of 3 CONFIDENTIAL THIS DRAWING AND THE DESIGN REPRESENTED HEREON IS THE PROPERTY OF NILFISK-ADVANCE, INC., PLYMOUTH, MINNESOTA AND IT HAS BEEN ISSUED WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRO- DUCED NOR COPIED NOR USED FOR ANY PURPOSE OTHER THAN FOR WHICH IT WAS ISSUED AND RECIPIENT AGREES TO RETURN IT UPON REQUEST.
Page 84: Wiring Diagram Pn 56414095 Rev C Sheet 3 Of 3
Wiring Diagram PN 56414095 REV C Sheet 3 of 3 CONFIDENTIAL THIS DRAWING AND THE DESIGN REPRESENTED HEREON IS THE PROPERTY OF NILFISK-ADVANCE, INC., PLYMOUTH, MINNESOTA AND IT HAS BEEN ISSUED WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRO- DUCED NOR COPIED NOR USED FOR ANY PURPOSE OTHER THAN FOR WHICH IT WAS ISSUED AND RECIPIENT AGREES TO RETURN IT UPON REQUEST.
Page 85: Wiring Harness Diagram 56414096_Rev_C
Wiring Harness Diagram 56414096_REV_C CONFIDENTIAL THIS DRAWING AND THE DESIGN REPRESENTED HEREON IS THE PROPERTY OF NILFISK-ADVANCE, INC., PLYMOUTH, MINNESOTA AND IT HAS BEEN ISSUED WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRO- DUCED NOR COPIED NOR USED FOR ANY PURPOSE OTHER THAN FOR WHICH IT WAS ISSUED AND RECIPIENT AGREES TO RETURN IT UPON REQUEST.
Page 86: Options And Accessories
Service Manual – SC6500 Options and Accessories ™ Options and Accessories Description Heavy duty front bumper Tube Bumper Kit Spray Wand...
Page 87 Service Manual – SC6500 Options and Accessories ™ Description Warning Beacon Back-Up Alarm Overhead Guard...
Page 88 Service Manual – SC6500 Options and Accessories ™ Description Seat Belt - Standard Seat Deluxe Grammer Seat 2nd vacuum motor kit...
Page 89 Service Manual – SC6500 Options and Accessories ™ Description Headlight Operator Foot Guard Solution Auto-Fill Recovery Drain Hose Extension...
Page 90: Recovery System
Service Manual – SC6500 Recovery System ™ Recovery System Functional Description Overview The recovery system picks up the scrubbing solution from the squeegee Top Cover Float Cage tool and directs it to the Assembly Recovery Tank and Ball Recovery Tank Cover Recovery Tank Cover holds 70 gallons...
Page 91: Float Cage And Ball
Service Manual – SC6500 Recovery System ™ Float Cage and Ball A shutoff prevent the from being overfilled and stops any water from being Float Cage and Ball Recovery Tank sucked into the . When the rises (to full-tank level) it will seat itself inside the Vacuum Motor Float Ball Cage...
Page 92: Circuit Description
Service Manual – SC6500 Recovery System ™ Circuit Description get positive voltage from the when the load sides of contactors Vacuum Motors M5 Battery are closed. Contactors close when the connects the contactor A2 Control Board Assembly coils to battery ground. are connected directly to battery ground.
Page 93: Top Cover Assembly
Service Manual – SC6500 Recovery System ™ Top Cover Assembly is fastened to the top Top Cover Assembly of the recovery tank and includes the Vacuum Vacuum Filter Lid Filter Filter Screen Recovery Tank Filter Lid . The Vacuum Cover Plate Float Cage contained attach to the bottom of the...
Page 94: Recovery Tank Lid
Service Manual – SC6500 Recovery System ™ Recovery Tank Lid is hinged Recovery Tank Lid and opens to allow access to the Recovery Tank Lid Recovery Tank Squeegee and Drain Hoses Squeegee Hose Drain are mounted on the rear of Hoses Recovery Tank connects the...
Page 95: Maintenance
Service Manual – SC6500 Recovery System ™ Maintenance Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. To Inspect and Clean the Vacuum Filter and Inlet Screen Open the tethered Vacuum Filter Lid Vacuum...
Page 96: Troubleshooting
Service Manual – SC6500 Recovery System ™ Troubleshooting If water flows around the ends of the squeegee tool instead of being pulled into the tool, the vacuum system is not working correctly. This is usually due to either vacuum leaks, or restrictions in the squeegee tool, vacuum hoses or float cage.
Page 97: Insufficient Water Pick-Up
Service Manual – SC6500 Recovery System ™ Insufficient Water Pick-up Good water pick up performance depends on the proper amount of air flowing through the squeegee pickup tool. Air entering the vacuum system before the pickup tool will reduce its ability to pick up water. Anything that restricts the movement of air through the system will also reduce its ability to pick up water.
Page 98 Service Manual – SC6500 Recovery System ™ Install a one inch open-hole adapter between the hose end and the vacuum gauge. Turn the vacuum motor on and measure the vacuum. If it is within 10% of the specs, the vacuum system is working properly.
Page 99: Removal And Installation
Service Manual – SC6500 Recovery System ™ Removal and Installation Warning! Before removing or reinstalling any machine components, disconnect the battery pack by pushing in the emergency-stop switch/battery disconnect, and make sure the parking brake is engaged. Recovery Tank Drain the recovery tank. Disconnect the squeegee hose from the squeegee tool, and from the top of the recovery tank (twist the hose to remove).
Page 100: Vacuum Motor
Service Manual – SC6500 Recovery System ™ Disconnect the from the back of Tank Tether the operator seat. Caution: Maintain a good grip on the recovery tank and control Tank the tank as you lower it. Do Tether not allow the tank to fall to the floor on its own.
Page 101 Service Manual – SC6500 Recovery System ™ Remove the five from the Screws Top Cover , then lift the Assembly Top Cover Assembly straight up while guiding the float cage up through the opening in the recovery tank. Screw (5) Top Cover Assembly Disconnect the...
Page 102: Specifications
K1 Vacuum Contactor Resistance at room temperature: 93 ohms Vacuum Motor Current draw for one motor with open squeegee hose: 18.7 Amps Special Tools Vacuum water lift gauge, Nilfisk-Advance part number 56205281...
Page 103: Scrub System, Cylindrical
Service Manual – SC6500 Scrub System, Cylindrical ™ Scrub System, Cylindrical Functional Description Overview The SC6500 cylindrical scrub deck models use two cylindrical brushes that counter-rotate to sweep up light debris into a removable hopper, and scrub at the same time. The two scrub brushes are powered on opposing ends by 1-1/2 HP permanent-magnet motors and drive belts.
Page 104: Circuit Description
Service Manual – SC6500 Scrub System, Cylindrical ™ Circuit Description The coil sides of contactors get positive voltage from the when the load side of contactor Battery is closed. Contactor closes when the connects the coil to battery ground. A2 Control Board Assembly Contactors are connected to battery ground through the A2 Control Board Assembly...
Page 105: Component Locations
Service Manual – SC6500 Scrub System, Cylindrical ™ Component Locations The 1-1/2 HP permanent-magnet Scrub drive Motors Poly V Sheaves Drive Belts that drive the broom drive lug assemblies coupled to the brushes. Scrub Deck Actuator Assembly raises and lowers the scrub deck and automatically adjusts the deck height during scrubbing to maintain the correct Scrub Deck...
Page 106: Maintenance And Adjustments
Service Manual – SC6500 Scrub System, Cylindrical ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. General Scrub System Maintenance The scrubbing system must be serviced at regular intervals to maintain good scrubbing performance.
Page 107 Service Manual – SC6500 Scrub System, Cylindrical ™ Use a 1/2” drive extension and ratchet in the large pulley slot, to rotate the pulley while pulling outward on the belt to roll the belt off of the pulleys. Place the new belt on the large pulley and then use a plastic wire tie to hold the belt on the pulley.
Page 108: Lift Actuator Adjustment
Service Manual – SC6500 Scrub System, Cylindrical ™ If the belt is not seated properly in the pulley grooves, gently push or pull in the direction that the belt must Belt Seated move while rotating the belt. Reinstall the Belt Guard and Side Skirt Assembly, then test Belt Not the scrub system for correct...
Page 109: Lift Actuator Drive Nut Adjustment
Service Manual – SC6500 Scrub System, Cylindrical ™ Lift Actuator Drive Nut Adjustment This procedure sets the relative position between the drive nut on the actuator lead screw and the base of the actuator motor assembly. Make a note of how the actuator housing assembly should be mounted on the machine. Familiarize yourself with the actuator assembly pieces an the assembly order of the springs, drive nut and spring housing.
Page 110 Service Manual – SC6500 Scrub System, Cylindrical ™ Hold the drive nut to prevent it from rotating, then using the actuator power cord adapter (p/n 56407502), run the motor toward the retracted position until the motor stops. This establishes the location where the retracted travel limit switch opens.
Page 111 Service Manual – SC6500 Scrub System, Cylindrical ™ Recheck the retracted and extended position adjustments by holding on to the drive nut to prevent it from rotating and driving the motor to each limit position using the actuator power cord adapter. Repeat adjustments until correct.
Page 112 Service Manual – SC6500 Scrub System, Cylindrical ™ 10. After each adjustment, hold the , run the actuator in and out and check both Spring Housing Assembly dimensions. 11. Reinstall the Cam Adjuster Cover 12. After adjusting the actuator Spring Housing Assembly dimensions, refer to the Removal and Installation/Scrub Deck Lift...
Page 113: Side Skirt Replacement And Adjustment
Service Manual – SC6500 Scrub System, Cylindrical ™ Side Skirt Replacement and Adjustment During normal use the side skirt blades will wear in time. The operator will notice a small amount of water leaking out underneath the side skirts. You can easily adjust the side skirt height to lower the blades to allow the squeegee to pick up the water more effectively.
Page 114: Troubleshooting
Service Manual – SC6500 Scrub System, Cylindrical ™ Troubleshooting Problem Cause Correction The scrub system Scrub deck sense R2 Scrub deck sensor resistor is unplugged or will not operate resistor fault (error code damaged. displayed) 1. Check the resistor wiring for an open. 2.
Page 115 Service Manual – SC6500 Scrub System, Cylindrical ™ Problem Cause Correction The scrub system Right brush motor contactor 1. Check for an open circuit in the coil and wiring will not operate coil open (error code (wire colors VIO and YEL/BLU). (continued) displayed) 2.
Page 116: Removal And Installation
Service Manual – SC6500 Scrub System, Cylindrical ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off, key is removed from the machine and the parking brake is engaged. Scrub Brushes Make sure the scrub deck is in the raised position and the key switch is off.
Page 117: Scrub Brush Deck
Service Manual – SC6500 Scrub System, Cylindrical ™ Scrub Brush Deck Warning! Engage the parking brake and chock both rear wheels so the machine can’t roll. Loosen the four side skirt Retainer Knobs (two per side) and Cotter remove the Hair Pin Scrub Deck Side Skirt...
Page 118 Service Manual – SC6500 Scrub System, Cylindrical ™ Service Note: Removing both the left and right side brooms and both front chassis corner rollers will allow easier access to the mounting hardware on the four front scrub deck support arms. Warning! Safely jack up the front of the machine 1-1/2 to 2 inches (38-50 mm) and put a wood block (2 x 4) underneath the drive wheel for a safety support.
Page 119: Scrub Deck Lift Actuator
Service Manual – SC6500 Scrub System, Cylindrical ™ Scrub Deck Lift Actuator Note: All new replacement actuator motors are not shipped with the lift nut pre-adjusted for any specific machine model application. Note: The scrub deck must be removed to access the top mount bracket on the scrub deck lift motor. Remove the scrub deck by following the steps in the section.
Page 120: Scrub Brush Motor
Service Manual – SC6500 Scrub System, Cylindrical ™ Scrub Brush Motor Note: It is not necessary to remove the complete scrub deck assembly from the machine to service an individual scrub brush motor. Remove the Side Skirt Assembly on the side of the deck that needs the scrub motor replaced.
Page 121: Specifications
Service Manual – SC6500 Scrub System, Cylindrical ™ Specifications Component Specifications Voltage – 36 VDC Power – 1100 Watt Scrub Brush Motor Speed – 2200 RPM Current – 30 Amps UP Rating – 55 Type – permanent magnet, 36 VDC, 1/5 HP, reversible Motor-to-drive-screw ratio –...
Page 122: Brush Actuator Motor
Service Manual – SC6500 Scrub System, Cylindrical ™ Brush Actuator Motor • 45 inch cylindrical deck – Current draw going up: 3.5-4.0 Amps – Current draw going down: 1.2-2.2 Amps Special Tools Actuator Power Cord Adapter, p/n 56407502...
Page 123: Scrub System, Disc
Service Manual – SC6500 Scrub System, Disc ™ Scrub System, Disc Functional Description Overview The SC6500 disc models use rotary brushes powered by permanent-magnet motors and gearbox assemblies. The 40” decks have two scrub brushes that are both powered by one 3 HP motor/gearbox assembly. The 45” and 48”...
Page 124: Circuit Description
Service Manual – SC6500 Scrub System, Disc ™ Circuit Description The coil sides of contactors get positive voltage from the when the load side of contactor K3 and K4 Battery is closed. Contactor closes when the connects the coil to battery ground. A2 Control Board Assembly Contactors are connected to battery ground through the...
Page 125: Component Locations
Service Manual – SC6500 Scrub System, Disc ™ Component Locations On the 45” and 48” decks, three 1-1/2 HP drive the scrub brushes directly. The Gearmotors 40” decks have a single 3 HP with two Gearmotor gearboxes (one on either end) that power the two scrub brushes.
Page 126: Maintenance And Adjustments
Service Manual – SC6500 Scrub System, Disc ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Lift Actuator Adjustment The lift actuator adjustment makes sure that the deck can be properly positioned when extended for scrubbing operations and when retracted for machine transport.
Page 127: Lift Actuator Drive Nut Adjustment
Service Manual – SC6500 Scrub System, Disc ™ Lift Actuator Drive Nut Adjustment This procedure sets the relative position between the drive nut on the actuator lead screw and the base of the actuator motor assembly. Make a note of how the actuator housing assembly should be mounted on the machine. Familiarize yourself with the actuator assembly pieces an the assembly order of the springs, drive nut and spring housing.
Page 128 Service Manual – SC6500 Scrub System, Disc ™ Hold the drive nut to prevent it from rotating, then using the actuator power cord adapter (p/n 56407502), run the motor toward the retracted position until the motor stops. This establishes the location where the retracted travel limit switch opens.
Page 129 Service Manual – SC6500 Scrub System, Disc ™ Recheck the retracted and extended position adjustments by holding on to the drive nut to prevent it from rotating and driving the motor to each limit position using the actuator power cord adapter. Repeat adjustments until correct.
Page 130 Service Manual – SC6500 Scrub System, Disc ™ 10. After each adjustment, hold the , run the actuator in and out and check both Spring Housing Assembly dimensions. 11. Reinstall the Cam Adjuster Cover 12. After adjusting the actuator Spring Housing Assembly dimensions, refer to the Removal and Installation/Scrub Deck Lift...
Page 131: Side Skirt Replacement And Adjustment
Service Manual – SC6500 Scrub System, Disc ™ Side Skirt Replacement and Adjustment During normal use the side skirt blades will wear in time. The operator will notice a small amount of water leaking out underneath the side skirts. You can easily adjust the side skirt height to lower the blades to allow the squeegee to pick up the water more effectively.
Page 132: Troubleshooting
Service Manual – SC6500 Scrub System, Disc ™ Troubleshooting Problem Cause Correction The scrub system Scrub deck sense R2 Scrub deck sensor resistor is unplugged or will not operate resistor fault (error code damaged. displayed) 1. Check the resistor wiring for an open. 2.
Page 133 Service Manual – SC6500 Scrub System, Disc ™ Problem Cause Correction The scrub system Left brush motor contactor 1. Check for an open circuit in the coil and wiring will not operate coil open (error code (wire colors VIO and GRA/RED) (continued) displayed) 2.
Page 134: Removal And Installation
Service Manual – SC6500 Scrub System, Disc ™ Problem Cause Correction The scrub deck Scrub deck actuator 1. Check for binding or a frozen brush lift linkage actuator doesn’t overload (error code and excessive weight on the brush deck. raise or lower the displayed) 2.
Page 135: Scrub Deck Lift Actuator
Service Manual – SC6500 Scrub System, Disc ™ Service Note: Once the brush deck is in the lowered position, don’t turn the key switch off until you disconnect the battery pack (push in the Emergency Disconnect). This will prevent the scrub deck from automatically rising when the key is turned off. Turn the key switch off.
Page 136: Scrub Brush Motor And Gearbox
Service Manual – SC6500 Scrub System, Disc ™ Scrub Brush Motor and Gearbox To Remove and Install a Gearbox Assembly Remove the scrub brushes from the Brush Holder(s) Gearbox Assembly Use a 13mm socket wrench to remove Gearbox the three from each Screws Thermoid...
Page 137: Specifications
Service Manual – SC6500 Scrub System, Disc ™ Specifications Component Specifications Type – Permanent Magnet Voltage – 36 VDC 40” deck Power – 3 HP Speed – 2400 RPM Scrub Brush Motors Current – 75 Amps Voltage – 36 VDC Power –...
Page 138: Special Tools
Service Manual – SC6500 Scrub System, Disc ™ Special Tools Actuator Power Cord Adapter, p/n 56407502...
Page 139: Solution System
Service Manual – SC6500 Solution System ™ Solution System Functional Description Overview The solution system provides the Water and detergent mixture to the scrub brushes. Water and detergent are added to the solution tank for Standard (non-EcoFlex) SC6500 models. EcoFlex models have a separate detergent tank.
Page 140: Solution Tank
Service Manual – SC6500 Solution System ™ Solution Tank holds 70 gallons (265 l) of solution. The solution fill cover opens to allow you to fill the Solution Tank . The solution empty switch is a float switch that closes and sends a signal to the A2 Control Solution Tank Board Assembly when the solution level in the falls to two to three inches from the bottom of...
Page 141: Detergent Tank And Pumps
Service Manual – SC6500 Solution System ™ Detergent Tank and Pumps pump detergent from the to the tee fitting upstream of the solution Detergent Pumps Detergent Tank pump. The get PWM voltage from the A2 Control Board to regulate the speed of the Detergent Pumps and the subsequent detergent flow.
Page 142: Detergent System
Service Manual – SC6500 Solution System ™ and solution are connected to battery ground through the Solution Control Pump M12 Solenoid Valve L1 . The connects the and solution Control Board Assembly A2 Control Board Assembly Solution Control Pump M12 to ground to run the and switch on the when:...
Page 143: Component Locations
Service Manual – SC6500 Solution System ™ Component Locations Shutoff Valve is located underneath the Shutoff Valve solution tank on the left rear side of the machine. Shutoff Valve Solution Level Switch The solution level switch is a float switch in the bottom of the solution tank. It reports when the tank is nearly empty.
Page 144: Drain Hose And Hose Cap
Service Manual – SC6500 Solution System ™ Drain Hose and Hose Cap are attached Drain Hose Drain Hose Cap to the shutoff valve and are located above the left rear tire. Drain Hose Drain Hose Solution Filter The in-line is located between the Solution Filter shutoff valve and the solution pump underneath the left side of the machine.
Page 145: Solution Solenoid Valve
Service Manual – SC6500 Solution System ™ Solution Solenoid Valve opens to allow solution Solution Solenoid Valve flow to the scrub brushes. Although the Solution gets PWM voltage from the A2 Solenoid Valve Control Board, it remains full-open when the Solution Solenoid solution pump is switched on.
Page 146: Detergent Tank And Pumps
Service Manual – SC6500 Solution System ™ Detergent Tank and Pumps Detergent Tank Detergent Pumps are located behind the side access panel on the right-hand side of the machine. Detergent Pump Detergent Tank Detergent Pump...
Page 147: Maintenance And Adjustments
Service Manual – SC6500 Solution System ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. To Disassemble and Clean the Solution Solenoid Valve Remove the solution solenoid valve from the machine.
Page 148: To Clean The Solution Delivery Trough (Cylindrical Scrub Decks Only)
Service Manual – SC6500 Solution System ™ Unscrew the and remove the from Filter Cover Filter Cover Screen Filter Base Filter Clean any accumulated dirt or debris from the Cover Screen Reinstall the into the Screen Filter Base Rubber Make sure the is installed correctly in the Rubber Washer Filter Cover...
Page 149: To Purge The Detergent System When Changing Detergents
Service Manual – SC6500 Solution System ™ To Purge the Detergent System When Changing Detergents Disconnect and remove the detergent tank. Turn the key switch off. Press and hold both the detergent and solution switches. While holding the switches, turn the key switch on. The display will show the purge icon, the detergent and solution pumps will run for 20 seconds, then shut off.
Page 150: Troubleshooting
Service Manual – SC6500 Solution System ™ Troubleshooting Note: You can use the Service Test Mode to toggle the various system components on and off to check for function. Refer to the Control System/Service Mode section for information on how to enter and use the Service Test Mode. Problem Cause Correction Problem Cause Solution Inadequate or no The solution shutoff valve is Open the solution shutoff valve. solution flow in the off position. Clogged solution filter, •...
Page 151 Service Manual – SC6500 Solution System ™ Problem Cause Correction Inadequate or no The detergent system has Check that the detergent system has been selected detergent flow not been selected in the in the main control programming. main control programming. Blockage in or damage to Check detergent lines for blockage or damage and the detergent lines...
Page 152: Removal And Installation
Service Manual – SC6500 Solution System ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Solution Control Pump Note: Access the solution control pump from underneath the machine.
Page 153: Solution Solenoid Valve
Service Manual – SC6500 Solution System ™ Solution Solenoid Valve Drain the solution tank or turn the solution shutoff valve to the off position to prevent solution loss. Disconnect the battery from the machine. Note: Place a suitable container underneath the filter to catch any solution that may leak from the solenoid valve or hoses. Disconnect the L1 solenoid valve Electrical from the machine harness.
Page 154: Specifications
Service Manual – SC6500 Solution System ™ Specifications Solution Flow Rates Standard Flow Rates Override Flow Rates 1 bar 2 bars 3 bars 4 bars 5 bars 40” Disc .84 GPM 1.00 GPM 1.50 GPM 2.00 GPM 2.50 GPM 40” Cylindrical .70 GPM .84 GPM 1.00 GPM...
Page 155: Squeegee System
Service Manual – SC6500 Squeegee System ™ Squeegee System Functional Description Overview The squeegee system includes the squeegee tool and the squeegee lift actuator. The squeegee tool picks up the wastewater from the floor. The recovery system vacuum lifts the wastewater from the squeegee and directs it to the recovery tank.
Page 156: Squeegee Lift Actuator Reverse Function
Service Manual – SC6500 Squeegee System ™ Squeegee Lift Actuator Reverse Function The squeegee actuator operates in the automatic mode when scrubbing and will automatically lower to its normal operating position when the scrub system is enabled. To prevent squeegee blade damage and excessive wear, the will lift the squeegee tool from the floor when the machine is Squeegee Actuator M3...
Page 157: Maintenance And Adjustments
Service Manual – SC6500 Squeegee System ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. To Reverse or Replace the Rear Squeegee Wiping Blade Raise the squeegee tool off the floor, then unsnap the...
Page 158: Squeegee Adjustment
Service Manual – SC6500 Squeegee System ™ Squeegee Adjustment There are two major squeegee tool adjustments–height and angle. The recommended procedure is to set the squeegee angle first, then adjust the squeegee blade height. To Adjust the Squeegee Angle Adjust the squeegee angle whenever a blade is reversed or replaced, or if the squeegee is not wiping the floor dry.
Page 159: Lift Actuator Adjustment
Service Manual – SC6500 Squeegee System ™ Lift Actuator Adjustment Using the Actuator Power Cord Adapter The adjacent drawing shows the special actuator power cord adapter (p/n 56407502) that is needed to connect the machine’s battery pack and actuator motor for setting the actuator drive nut limit settings.
Page 160: Troubleshooting
Service Manual – SC6500 Squeegee System ™ Measure the position of the on the shaft and compare the measurement with the Actuator Drive Nut position shown in the table below. Part # Actuator Motor Actuator Drive Nut Actuator Drive Nut Models IN Position OUT Position...
Page 161: Removal And Installation
Service Manual – SC6500 Squeegee System ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Squeegee Lift Actuator Remove the Squeegee from the...
Page 162: Specifications
Service Manual – SC6500 Squeegee System ™ Specifications Component Specifications Type – permanent magnet, 36 VDC, 1/6 HP, reversible Motor-to-drive-screw ratio – 27.1:1 Performance Data Squeegee Actuator Motor No Load – Thrust 0 lbs., Speed 39 in/min, 1.4 Amps max. Full Load –...
Page 163: Steering System
Service Manual – SC6500 Steering System ™ Steering System Functional Description Drive Wheel Steering Assembly The steering assembly transfers the steering wheel rotation through the steering shafts and universal joint to the at the bottom Steer Sprocket of the assembly. The runs a chain connected to the front Steer Sprocket spindle weldment to turn the drive wheel left and right.
Page 164: Maintenance And Adjustments
Service Manual – SC6500 Steering System ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Steering Chain Inspect the chain for looseness and binding.
Page 165 Service Manual – SC6500 Steering System ™ Service Note: Use a pry bar or shims between the chassis and steer column to help secure the tension adjustment when tightening the four steering column mounting Screws...
Page 166: Sweep System, Side Broom
Service Manual – SC6500 Sweep System, Side Broom ™ Sweep System, Side Broom Functional Description Overview The optional side brooms are available on cylindrical deck machines only. The two 20-inch [50.8 cm] side brooms are mounted at the front corners of the machine and rotate in opposite directions to sweep dirt and debris into the main cylindrical brushes.
Page 167: Circuit Description
Service Manual – SC6500 Sweep System, Side Broom ™ Circuit Description The coil side of contactor gets positive voltage from the when the load side of contactor Battery closed. Contactor closes when the connects the coil to battery ground. A2 Control Board Assembly Contactor is connected to battery ground through the A2 Control Board Assembly...
Page 168: Maintenance And Adjustments
Service Manual – SC6500 Sweep System, Side Broom ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Side Broom Height Adjustment The height of the side brooms is determined by the length of time the side broom actuator runs as it lowers the side brooms.
Page 169: Lift Actuator Adjustment
Service Manual – SC6500 Sweep System, Side Broom ™ Lift Actuator Adjustment This section explains the steps for adjusting the actuator drive nut ( ) setting for the Spring Housing Assembly lift actuator motor. Using the Actuator Power Cord Adapter The adjacent drawing shows the special actuator power cord adapter (p/n 56407502) that is needed to connect the machine’s...
Page 170 Service Manual – SC6500 Sweep System, Side Broom ™ Hold the then press the adapter cord rocker switch to run the drive motor to the Actuator Drive Nut position (wait until the motor stops). Measure the position of the on the shaft and compare the measurement with the Actuator Drive Nut position shown in the table below.
Page 171: Troubleshooting
Service Manual – SC6500 Sweep System, Side Broom ™ Troubleshooting Problem Cause Correction Poor sweeping Brushes are worn or Check and replace the brushes as necessary. performance damaged The broom height is not set Check and reset the broom height. Refer to the Side correctly.
Page 172: Removal And Installation
Service Manual – SC6500 Sweep System, Side Broom ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Side Broom Lift Actuator Note: New replacement lift actuator motors do not come with the lift drive nut pre-adjusted.
Page 173: Side Broom Gearmotor
Service Manual – SC6500 Sweep System, Side Broom ™ Side Broom Gearmotor Remove the Side Broom Retainer Pin Spring (2) Gearmotor then pull down on Assembly Side Broom remove it from the motor shaft. Disconnect the motor Side Broom wiring connector from Spring Bracket the main machine...
Page 174: Specifications
Service Manual – SC6500 Sweep System, Side Broom ™ Specifications Component Specifications Type – permanent magnet, 36 VDC Gearbox – 27:1 ratio Side Broom Gearnotor Power – 162 Watts Output – 105 in-lbs. @ 84 RPM Current – 6 Amps Type –...
Page 175: Special Tools
Service Manual – SC6500 Sweep System, Side Broom ™ Special Tools Actuator Power Cord Adapter, p/n 56407502...
Page 176: Wheel System, Non-Traction
Service Manual – SC6500 Wheel System, Non-traction ™ Wheel System, Non-traction Functional Description Overview The non-traction wheel system supports the rear of the machine and includes the braking system. Component Locations (rear) Non-traction are attached to the Wheels Brake brake and are Spindles Pedal...
Page 177: Maintenance And Adjustments
Service Manual – SC6500 Wheel System, Non-traction ™ Maintenance and Adjustments Warning! Before performing any machine maintenance or adjustments, make sure the key switch is off and the key is removed from the machine. Chock both rear wheels so the machine can’t roll. Brake Cable Adjustment Caution! Always test-ride the machine after making any adjustments to the brake system to confirm that the braking system is operating correctly.
Page 178: Brake Caliper Pad Wear Adjustment
Service Manual – SC6500 Wheel System, Non-traction ™ Brake Caliper Pad Wear Adjustment Caution! Always test-ride the machine after making any adjustments to the brake system to confirm that the braking system is operating correctly. Note: The must not bottom out against the front slot on the caliper. Brake Arm Loosen the large outer Locknut...
Page 179: Troubleshooting
Service Manual – SC6500 Wheel System, Non-traction ™ Troubleshooting Problem Cause Correction Poor braking The brakes are out of Adjust the brake cable as necessary. (Refer to the performance adjustment section.) Brake Cable Adjustment If the brake cable is stretched to the point where it cannot be adjusted to provide good braking performance, replace the brake cable assembly.
Page 180: Removal And Installation
Service Manual – SC6500 Wheel System, Non-traction ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off and the key is removed from the machine. Install wood blocking or chocks in front of and behind the front drive wheel to prevent the machine from rolling.
Page 181: Rear Wheel And Brake Caliper
Service Manual – SC6500 Wheel System, Non-traction ™ Rear Wheel and Brake Caliper Remove the Cotter Pin and washer from the Brake Linkage Rod Cotter disconnect the Brake Brake Linkage from the Linkage Rod top brake arm Brake mounting hole. Remove the Cotter Pin and washer from the...
Page 182: Wheel System, Traction
Service Manual – SC6500 Wheel System, Traction ™ Wheel System, Traction Functional Description A single front wheel provides both traction drive and steering. The major components of the drive wheel system are the drive pedal, wheel drive controller and drive wheel motor assembly. The drive wheel is mounted to a front spindle which carries the vehicle load and provides a steering pivot.
Page 183: Wheel Motor, Temp Sensor And Encoder
Service Manual – SC6500 Wheel System, Traction ™ Wheel Motor, Temp Sensor and Encoder The drive wheel motor assembly contains an AC motor, temperature sensor and an encoder. The AC motor consists of an outer stator and a rotor. The temperature sensor is embedded in the stator windings. There is a magnetic ring attached to the rotor.
Page 184: Circuit Description
Service Manual – SC6500 Wheel System, Traction ™ Circuit Description The wheel drive controller takes in DC power at the battery positive and negative lugs and converts it to an AC output to rotate the wheel drive motor. The drive pedal potentiometer is the primary input to the controller, but it also looks at the wheel drive motor temperature and encoder signals.
Page 185: Motor Temperature Sensor
Service Manual – SC6500 Wheel System, Traction ™ an additional dedicated wire for this circuit and it works in the same way as the “Motion” circuit. When the vehicle is moving forward, the switch is open and the input is high. When the vehicle is moving in reverse, the switch closes, causing the input to go low.
Page 186 Service Manual – SC6500 Wheel System, Traction ™ Encoder The encoder is a solid state device and requires a power supply in order to work. The power supply is provided by the wheel drive controller. It has two transistor switches that open and close as the magnetic ring rotates.
Page 187: Component Locations
Service Manual – SC6500 Wheel System, Traction ™ Component Locations • Drive Wheel Assembly • Wheel Drive Controller • Drive Pedal with potentiometer • Seat Switch S2 • Battery Interlock Switch S3 Wheel Drive Controller Drive Pedal Seat Switch Drive Wheel Assembly Battery Interlock Switch...
Page 188: Troubleshooting
Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting If there is a problem with the wheel drive system, begin by checking for any fault codes. If there is a fault code, diagnose the cause of the code. If there are no fault codes, check the wheel drive controller status LED for clues and use the in the section to systematically check the voltage...
Page 189: Summary Of Led Display Formats
Service Manual – SC6500 Wheel System, Traction ™ LED flashes RED once to indicate that the first digit of the code will follow; the LED then flashes YELLOW the appropriate number of times for the first digit. The LED flashes RED twice to indicate that the second digit of the code will follow;...
Page 190: Fault Code Table (Troubleshooting Chart)
Service Manual – SC6500 Wheel System, Traction ™ Fault Code Table (Troubleshooting Chart) The troubleshooting chart, provides the following information on each wheel drive controller fault: • Fault code • Fault name as displayed on the programmer’s LCD • The effect of the fault •...
Page 191 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Heatsink temperature Controller Severe 1. See Monitor menu » Controller: above +95°C (+203°F) Overtemp Temperature. 2. Controller is operating in an ShutdownMotor;...
Page 192 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Capacitor bank Undervoltage Cutback 1. Normal operation. Fault voltage dropped below the shows that the batteries Reduced drive torque. Undervoltage limit with the need recharging.
Page 193 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Digital Output 7 (pin 20) Digital Out 7 Overcurrent 1. External load impedance on current exceeded 15 mA. Digital Output 7 driver (pin 20) Digital Output 7 driver will is too low.
Page 194 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Driver 2 (pin 5) is either Coil2 Driver Open/Short 1. Open or short on driver load. open or shorted. This fault can 2.
Page 195 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: With the main contactor Main Contactor Did Not 1. Main contactor did not close. commanded closed, the Close 2.
Page 196 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Pot low (pin 18) current Pot Low Overcurrent 1. See Monitor menu » Outputs: exceeds 10mA. Pot Low. ShutdownThrottle;...
Page 197 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Runtime VCL code error VCL (Vehicle Control 1. VCL code encountered a condition. Language) Run Time runtime VCL error. Error 2.
Page 198 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: No motor encoder Stall Detected 1. Stalled motor. movement detected. 2. Motor encoder failure. ShutdownEMBrake; Control Mode changed to Clear: Either cycle KSI, or 3.
Page 199 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: Motor characterization Motor Characterization 1. Motor characterization failed failed during the motor Fault during characterization characterization process. process.
Page 200 Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Set: VCL and OS software do VCL/OS Mismatch 1. The VCL software in the not match; when KSI cycles, controller does not match the ShutdownMotor;...
Page 201: Fault History
Service Manual – SC6500 Wheel System, Traction ™ Troubleshooting Chart Flash Possible Cause(s) Set/Clear Conditions Programmer LCD Code Display/ Effect Of Fault Dualmotor Parameter 1. Dual Drive fault: see Dual Mismatch Drive manual. Fault History The 1313 programmer can be used to access the controller’s fault history file. The programmer will read out all the faults the controller has experienced since the last time the fault history file was cleared.
Page 202: Removal And Installation
Service Manual – SC6500 Wheel System, Traction ™ Removal and Installation Warning! Before removing or reinstalling any machine components, make sure the key switch is off, the key is removed from the machine and the parking brake is engaged. Front Drive Wheel/Tire Removal Note: It is not necessary to remove the complete wheel drive/spindle assembly to service the drive tire only.
Page 203 Service Manual – SC6500 Wheel System, Traction ™ Turn the wheel so that the motor is facing forward. Remove the tire/wheel assembly using special Tire Puller Kit 56422174 a. Insert the “puller” extractor screws in the casting threaded holes as shown and turn them in until each screw touches the rim of the tire.
Page 204: Front Drive Wheel/Tire Installation
Service Manual – SC6500 Wheel System, Traction ™ Front Drive Wheel/Tire Installation Install the drive hub to the new wheel/tire using the 10 fasteners. Apply Loctite 648 (or equivalent) on the fasteners. Torque to 20-22 Nm.(16 ft lb) Lightly install the two alignment pins from the tire puller kit into two of the threaded holes of the gearbox hub flange.
Page 205: Wheel Drive Assembly
Service Manual – SC6500 Wheel System, Traction ™ Wheel Drive Assembly Warning! Turn the key switch off and disconnect the battery pack. Engage the machine parking brake and block both rear wheels so machine can’t roll. Disconnect the battery pack. Jack up the front of the vehicle so that the front wheel is off the ground and support the vehicle safely on jack stands.
Page 206 Service Manual – SC6500 Wheel System, Traction ™ Loosen the four Screws from Bearing underneath the front of the Dust Cap machine and push the lower steering column toward the Cotter rear of the machine. This will allow you to separate the Chain from the Steer Castle Sprocket...
Page 207: Potentiometer Testing
Service Manual – SC6500 Wheel System, Traction ™ Potentiometer Testing Note: Do not remove the potentiometer from the pedal assembly. Test the using an ohmmeter (the pot specification is 5K Ohms). Potentiometer Connect the meter leads to each of the outside connections on the .
Page 208: Wheel Drive Controller Replacement
Service Manual – SC6500 Wheel System, Traction ™ Wheel Drive Controller Replacement Warning! The Curtis controller is inherently a high-power device. When working around any battery-powered vehicle, appropriate safety precautions must be taken. These include, but are not limited to: proper training, wearing eye protection, avoiding loose clothing and jewelry, and using insulated wrenches.
Page 209: Speed Mode Table
Service Manual – SC6500 Wheel System, Traction ™ Speed Mode Table Mode 1 Mode2 Effect Pin 10 Pin 11 Low – 0V Low – 0V Transport Mode (Mode #1) High – 19V Low – 0V Scrub Mode (Mode #2) Low – 0V High –...
Page 210: Specifications
Service Manual – SC6500 Wheel System, Traction ™ Specifications Shop Measurements Shop measurements are values that were measured on a real machine. While they are not “specifications”, they can help you recognize normal vs. abnormal. Wheel Drive Controller Voltage Measurements All voltages are DC unless otherwise stated and were measured with the negative (black) voltmeter lead on battery negative and the key switch on.
Page 211: Motor U, V And W Terminal Pair Voltages
Service Manual – SC6500 Wheel System, Traction ™ Wire Color Circuit Voltage BLU/BLK Mode 1 (Curtis Switch 4) 0.003 V Key on 19.2 V Scrub on 0.09 V Scrub on and (“Rabbit” speed or Traction Control on.) BLK/WHT Mode 2 (Curtis Switch 5) 0.003 V Traction Control off 19.1 V Traction Control on Not Used...
Page 212: Motor U, V And W Terminal Pair Frequency
Service Manual – SC6500 Wheel System, Traction ™ Motor U, V and W Terminal Pair Frequency • U to V, V to W or W to U -130 HZ at full forward speed. Wheel Speed Controller Current Draw Measured with amp clamp around battery negative feed to wheel drive controller. •...
Page 213: Special Tools
Service Manual – SC6500 Wheel System, Traction ™ Special Tools Curtis hand-held programmer, model 1311-1101, part number 56409441 Curtis hand-held programmer, model 1313-1101, part number 56383571 Tire Puller Kit 56422174 Consists of threaded screws to push the wheel off the bearing and pilot studs for aligning drive hub threads during installation.

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Nilfisk-Advance SC6500 40C Service Manual

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Summary of Contents for Nilfisk-Advance SC6500 40C