Subscribe to Our Youtube Channel
Related Manuals for Nilfisk-Advance 56115530
Summary of Contents for Nilfisk-Advance 56115530
- Page 1 SC901 Service Manual Advance Model Numbers: 56115530 SC901 ST-28D 56115531 SC901 ST-34D 56115532 SC901 ST-32C English 04/2019 Form No. 56043178...
-
Page 2: Table Of Contents
Service Manual – SC901 Contents Contents 03 - General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 General Machine Description Revision History Service Manual Purpose and Application... - Page 3 Service Manual – SC901 Contents Navigation Using the Wiring Harness Diagram Wire Numbers Splice Points Connector Numbers Back-Probing Connector Voltages Testing Cables Diagnostic Scenarios Battery Testing Removal and Installation Electrical Bay Cover Squeegee and Brush Switches Drive Handle Drive Handle Cover Hour Meter Batteries Wiring Diagrams...
- Page 4 Service Manual – SC901 Contents Scrub Skirt Scrub Brush Motor Brush Motor Brushes Specifications 34 - Scrub System, Cylindrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Functional Description Circuit Overview Troubleshooting...
-
Page 5: 03 - General Information
Service Manual – SC901 03 - General Information General Machine Description The SC901 machine is a battery-powered, walk-behind, self-propelled commercial floor scrubbing machine with either a disc or cylindrical scrub system, and suitable for use in hotels, schools, hospitals, factories, shops, offices, rental businesses and similar applications. -
Page 6: Diagnostic And Service Tools
• Digital voltmeter (DVM) with DC current clamp • Hydrometer • Battery load tester for checking batteries • Set of torque wrenches These tools are also available from Nilfisk-Advance, Inc.: • Curtis 1311 hand held programmer, p/n 56409441, • Vacuum water lift gauge, p/n 56205281 Conventions All references to right, left, front and rear in this manual are as seen from the Operator’s position... -
Page 7: Safety
Service Manual – SC901 03 - General Information Safety Symbols It is important for you to read and understand this manual The information it contains relates to protecting your safety and preventing problems The symbols below are used to help you recognize this information DANGER: Indicates a potentially hazardous situation which, if not avoided, will result in death or serious injury. -
Page 8: Property Damage Messages
Service Manual – SC901 03 - General Information Property Damage Messages − Storage and operation temperature must be above 32°F (0°C) and a humidity between 30% and 95%, non-condensing. − Before use, all doors and hoods should be properly latched. −... -
Page 9: Lifting Or Transporting The Machine
Service Manual – SC901 03 - General Information Lifting or Transporting the Machine CAUTION: Never work under a machine without safety stands or blocks to support the machine. − Drain the recovery and solution tanks to prevent sloshing water from unbalancing the machine. -
Page 10: Technical Specifications
Service Manual – SC901 03 - General Information Technical Specifications Model SC901 28D SC901 34D SC901 32C Model No. 56115530 56115531 56115532 Voltage, Batteries 36V (6 x 6V) Battery Capacity 310 Ah Protection Grade IPX4 S P L IEC 60335-2-72: 2002 Amend. 1:2005, 68 dB(A)/20µPa... -
Page 11: Know Your Machine - Major Components
Service Manual – SC901 03 - General Information Know Your Machine — Major components: Recovery Cover Recovery Tank Control Handle Solution Tank Disk Deck Cylindrical Deck Chassis & Drive Squeegee... -
Page 12: Maintenance Schedule
Service Manual – SC901 03 - General Information Maintenance Schedule Maintenance intervals given are for average operating conditions Machines used in severe operational environments may require service more often Interval Maintenance Item Daily Weekly Monthly Yearly • Charge Batteries • Check/Clean Tanks &... -
Page 13: 14 - Wheel System, Non-Traction
Service Manual – SC901 14 - Wheel System, Non-Traction Functional Description The SC901 machine is propelled by the drive wheels The rear caster wheels add stability and ease of turning Caster Wheels Removal and Installation WARNING: Never work under machine without safety stands or blocking to support the machine. -
Page 14: 20 - Wheel System, Traction
Service Manual – SC901 20 - Wheel System, Traction Functional Description Control The SC901 machine is driven by an electrically Handle powered transaxle The transaxle is an open differential powered by a 1/2 hp, permanent magnet, 36V motor A Curtis 1228 solid state speed controller regulates the speed and direction of the wheel drive motor The motor speed controller is located in the electrical... -
Page 15: Drive Motor Pwm Function
Service Manual – SC901 20 - Wheel System, Traction Drive Motor PWM Function The drive motor is controlled from a Curtis 1228 controller, which is 1-Cycle a pulse-width-modulation speed controller designed specifically for (15kHz) permanent magnet DC motors Pulse-width-Modulation (PWM) is a form of motor speed control that alters the power to a motor by rapidly turning 25% PWM Duty Cycle the power on and off The ratio (also called “duty cycle”) between the... -
Page 16: Circuit Description
Service Manual – SC901 20 - Wheel System, Traction Circuit Description Drive Power Main battery power is always present at the drive controller from the battery (fused at 30 amps), however, the drive controller contains an internal main relay to inhibit main power when the KSI circuit is inactive When the KSI input receives battery-positive voltage, the controller pre-charges its internal DC Bus capacitor bank at 1 5 amps for 0 5 seconds, before it closes its own internal main relay This is referred to as the precharge function, and is used to reduce arching at the relay contacts In short, it permits the capacitor... -
Page 17: Troubleshooting
Service Manual – SC901 20 - Wheel System, Traction Troubleshooting The primary tool for troubleshooting the drive controller is the Curtis handheld programmer This tool interfaces with the drive controller to report back error codes, control status, and other functions The Curtis manual will describe this in greater detail, but the primary troubleshooting functions are under the Monitor and Diagnostics menus... - Page 18 Service Manual – SC901 20 - Wheel System, Traction Throttle Fault 1 Description Throttle fault When Monitored Setting Throttle input voltage out of range for the condition Conditions Always • Throttle input wire open or shorted Possible Causes • Throttle pot defective • Wrong throttle type selected Initial Action Make sure the drive paddle is in neutral position, and key-cycle the machine...
- Page 19 Service Manual – SC901 20 - Wheel System, Traction Speed Limit Pot Fault Description Speed limit pot fault When Monitored Setting Speed limit input voltage out of range for the condition Conditions Always • Speed limit input wire open or shorted Possible Causes • Speed limit pot defective Initial Action...
- Page 20 Service Manual – SC901 20 - Wheel System, Traction Low Battery Voltage Description .Battery voltage too low When Monitored Setting Battery voltage below 17 volts Conditions Always • Faulty battery Possible Causes • Poor connection Initial Action Make sure the batteries are fully charged Troubleshooting Steps If the actual battery voltage is not low, systematically check voltages from the drive controller, back to the batteries to identify the point of poor connection.
- Page 21 Service Manual – SC901 20 - Wheel System, Traction Overvoltage Description The battery voltage is too high When Monitored Setting Battery voltage above 48 volts Conditions Always • Improper battery wiring Possible Causes • Faulty battery charger Initial Action Troubleshooting Steps This scenario is very unlikely for a battery powered machine unless incorrect batteries were recently installed, or the battery charger is faulty AND plugged in to power.
- Page 22 Service Manual – SC901 20 - Wheel System, Traction Procedure/Wiring Fault High Pedal Disable Fault Description The throttle was commanded to be active at or before KSI activation. When Monitored Setting The 3-1 error is set if the 3-5 error persists for more than 10 Conditions seconds.
- Page 23 Service Manual – SC901 20 - Wheel System, Traction Precharge Fault Description The drive controller’s DC bus failed to charge to the KSI voltage before timeout. When Monitored Setting The DC bus did not charge to within 5 volts of the KSI voltage Conditions within 1.5 seconds.
- Page 24 Service Manual – SC901 20 - Wheel System, Traction Hardware Failsafe Description Drive motor amperage exceeded the controller’s capacity. When Monitored Setting Conditions Always While a short circuit may be the root cause, the drive controller is likely damaged as Possible Causes a result of uncontrolled amperage.
-
Page 25: Removal And Installation
Service Manual – SC901 20 - Wheel System, Traction Removal and Installation Drive Controller WARNING: Unswitched battery power is present at the drive controller. Disconnect the battery connector before servicing the machine. Note: Drive controllers are factory pre-programmed for the specific machine. Use only factory authorized replacement controllers. -
Page 26: Wheels
Service Manual – SC901 20 - Wheel System, Traction Wheels WARNING: To avoid unexpected movement, disconnect the battery connector before servicing the machine. − Never work under the machine without safety stands or blocking to support the machine. − To avoid instability of the lifted machine, block the rear (caster) wheels so that the weight of the machine is not on the caster wheels, which can pivot unexpectedly. -
Page 27: Drive Motor
Service Manual – SC901 20 - Wheel System, Traction Drive Motor WARNING: To avoid unexpected movement, disconnect the battery connector before servicing the machine. − Never work under the machine without safety stands or blocking to support the machine. − To avoid instability of the lifted machine, block the rear (caster) wheels so that the weight of the machine is not on the caster wheels, which can pivot unexpectedly. -
Page 28: Motor Brushes
Service Manual – SC901 20 - Wheel System, Traction Motor Brushes It is possible to replace the motor brushes without removing the motor from the transaxle, if you wish This is a decision you should make before you start, however, because one method requires removing the right wheel and the other method removes the left wheel Replacing the brushes is a relatively easy task, with the exception being the access to the upper-front brush This procedure is written from the standpoint of leaving the motor in place... -
Page 29: Transaxle
Service Manual – SC901 20 - Wheel System, Traction Transaxle WARNING: To avoid unexpected movement, disconnect the battery connector before servicing the machine. − Never work under the machine without safety stands or blocking to support the machine. − To avoid instability of the lifted machine, block the rear (caster) wheels so that the weight of the machine is not on the caster wheels, which can pivot unexpectedly. - Page 30 Service Manual – SC901 20 - Wheel System, Traction Remove the three lug nuts that secure each wheel to the transaxle, and remove both wheels Remove the ground wire (A) from the transaxle 10 Disconnect the motor connector (B) 11 To prevent the transaxle from falling to the floor, place supports or cushioning under the transaxle. 12 Remove the 4 bolts (C) and nuts (D) securing the right and left retaining plates (E) to the frame •...
-
Page 31: Specifications
Service Manual – SC901 20 - Wheel System, Traction Specifications Shop Measurements Drive Controller Connector Pin Terminal Wire Color Circuit Voltage (DC Volts to GND) Pot-Hi White 5 Volt bias to the speed limit pot 4.56 V Neutral Position 2.48 V Thrtl Pot Blue Throttle Pot... -
Page 32: Special Tools
Service Manual – SC901 20 - Wheel System, Traction Special Tools Curtis Programmer The Curtis 1313, 1311, or 1307 generation Programmers may be used to display drive controller error codes and program the drive controller The programmer presents complete diagnostic information in plain language without codes to decipher Faults are displayed in the Diagnostic Menu, and the status of the controller inputs/outputs is displayed in the Test Menu The handheld programmer can also be used to access the drive controller’s diagnostic history file. -
Page 33: 24 - Electrical System
Service Manual – SC901 24 - Electrical System Functional Description EcoFlex Control Battery Detergent Charger Pump Electrical Battery Disconnect The SC901 machine is powered using six, 6-volt batteries connected in series, for a total system nominal voltage of 36 volts To protect the batteries 150 A from over discharge, the system is protected with Fuse... - Page 34 Service Manual – SC901 24 - Electrical System On the operator’s handle is a combination battery indicator and hour meter The hour meter increments whenever the scrub system is active The LED bar graph on the battery indicator represents the battery charge The hour meter (battery indicator) also serves as a low-voltage cutout for the scrub system When the battery voltage is above the cutout threshold, the hour meter grounds its FET (Field Effect Transistor) Drain output, which permits the...
-
Page 35: Maintenance And Adjustment
Service Manual – SC901 24 - Electrical System Maintenance and Adjustment Setting Onboard Charger Battery Profile The machine may be equipped with the optional onboard battery charger If the charger is just being installed, or the batteries have been replaced with a different type, it will be necessary to program the charger to properly charge the batteries according to their type Batteries operate on chemical reactions that produce an electrical charge Charging a battery reverses these chemical reactions so they can produce power again Because these chemical reactions are complex, their... -
Page 36: Troubleshooting
Service Manual – SC901 24 - Electrical System Troubleshooting General Electrical Troubleshooting Diagnosing machine failures commonly involves testing electrical components and tracing electrical circuits as they pass throughout the machine This section is intended to provide you with the general information necessary to identify an electrical circuit from a schematic, and physically trace it and test it within the machine itself, as well as common steps necessary to test the electrical components making up that circuit “Electrical (Ladder) Diagram”... -
Page 37: Understanding The Features Of The Main Wiring Diagram
Service Manual – SC901 24 - Electrical System Understanding the Features of the Main Wiring Diagram The main wiring diagram is sometimes referred to as a ladder diagram because it is historically rooted in a type of schematic that resembled the rungs of a ladder Over time it has evolved into a hybrid ladder diagram, specifically to accommodate the presence Sample (V) TO 2A1... -
Page 38: Device Labeling
Service Manual – SC901 24 - Electrical System Device Labeling All of the components within the diagram carry various labels intended to assist in identifying those items in the actual machine, or to reference them to other drawings Device Numbers (Names): Each device is given its own unique identifier. -
Page 39: Using The Wiring Harness Diagram
Service Manual – SC901 24 - Electrical System coordinate information to help you locate the mating tag faster. So the first tag contains the coordinates of the second tag, and the second tag contains the coordinates of the first tag. The format of these coordinates are Sheet, Column, and Row These coordinates are part of the default title blocks on engineering drawings, and run around the perimeter of the drawing sheet The columns are represented by the letters across the top/bottom of the drawing, and... -
Page 40: Connector Numbers
Service Manual – SC901 24 - Electrical System Connector Numbers Every harness connector throughout the system is given a unique connector ID SOLUTION SOLENOID number The ID numbers can be used to locate the connector in the machine and to look up pin assignments in the “Connector Pinouts”... -
Page 41: Testing Cables
Service Manual – SC901 24 - Electrical System Testing Cables Secondary to testing active voltages, inspecting cables for open-circuit or short-circuit is one of the most valuable troubleshooting techniques available to the technician Testing for open circuit is pretty straight forward--if you don’t have continuity from one end of a circuit to the other, the circuit is open Short-circuit detection can be more complex, because it requires testing all adjacent conductors for undesirable continuity Compounding the problem is that the testing is conclusive only if a short-circuit is... -
Page 42: Diagnostic Scenarios
Service Manual – SC901 24 - Electrical System Diagnostic Scenarios The SC901 machine architecture is based on a hybrid of “Relay Logic” with limited control logic from the Curtis Drive Controller This causes a lot of the system troubleshooting to be interrelated between the standard relay-logic components and the drive system controller Most of the troubleshooting scenarios will be listed here, unless they are specific solely to the drive controller. -
Page 43: Battery Testing
Service Manual – SC901 24 - Electrical System Problem Cause Notes & Correction No Solution, but brush Solution circuit or The solution solenoid and optional detergent pump are motors run optional module enabled only when the brush is active. • For all models, make sure that the solution shutoff valve is not closed. -
Page 44: Removal And Installation
Service Manual – SC901 24 - Electrical System Removal and Installation Electrical Bay Cover CAUTION: Risk of Arc flash. The electrical bay contains exposed high-amperage electrical components. Take care to not allow tools to come in contact with exposed components. The electrical bay contains the majority of the machine’s electrical components The cover protects the components from debris and... -
Page 45: Drive Handle
Service Manual – SC901 24 - Electrical System Drive Handle Drive Handle Cover Removing the drive handle and/or the cover is a prerequisite to other procedures for servicing the hour meter, key switch, and drive potentiometers Removing the drive handle is necessary to access the electrical connector (B) for the handle, but may not be necessary for servicing individual components within the handle If you do not need to disconnect the harness... -
Page 46: Hour Meter
Service Manual – SC901 24 - Electrical System Hour Meter When replacing the hour meter, if possible, record the previous hours for maintenance tracking The hour meter can neither be reset nor changed, but the previous hour meter value should be recorded in an equipment log Disconnect the wiring plug (D) from the hour meter... -
Page 47: Batteries
Service Manual – SC901 24 - Electrical System Batteries CAUTION: Use extreme caution when working with batteries. Sulfuric acid in batteries can cause severe injury if allowed to contact the skin or eyes. • Explosive hydrogen gas is vented from the batteries through openings in the battery caps. Do not smoke while servicing the batteries. -
Page 48: Wiring Diagrams
Service Manual – SC901 24 - Electrical System Wiring Diagrams Electrical (Ladder) Diagram 56115525_REV_A BATTERY X5a3 X4a3 36 VDC X4b3 X5b3 FUSE, 150A X44A TELEMATICS CONNECTOR BRN/VIO INTERLOCK INTERLOCK PNK/BLU fl DRIVE fi SCRUB CHARGER, DELTA Q 36V, 21A PNK/BLU SPEED POT THROTTLE 100K OHM... -
Page 49: Wiring Harness Diagram
Service Manual – SC901 24 - Electrical System Wiring Harness Diagram Diagram Map (56115526_REV_A) To aid in reading the fine print text, the harness diagram is divided into separate sheets at the “Wire Net Lines”. These dashed Wire Net Lines are just a drawing mechanism to represent unspecified wire paths to avoid clutter in a drawing They are used for break-points here, because no information is permitted to cross those lines... -
Page 50: Sheet 1, Drive Handle Area
Service Manual – SC901 24 - Electrical System Sheet 1, Drive Handle Area 56115514 POTENTIOMETER-100K OHMS (380-C3-100K-S P LOW P HI WIPER 5 K OHMS THROTTLE POT 2 (WIPER) 56115515 P LOW P HI BATTERY GUAGE & HOURMETER WIPER PNK-WHT,18,W044 RED-YEL,18,W084 36 VDC X118A... -
Page 51: Sheet 2, Power Relays And Drive Controller
Service Manual – SC901 24 - Electrical System Sheet 2, Power Relays and Drive Controller... -
Page 52: Sheet 3, Scrub Functions
Service Manual – SC901 24 - Electrical System Sheet 3, Scrub Functions... -
Page 53: Sheet 4, Circuit Breakers And Trackclean
Service Manual – SC901 24 - Electrical System Sheet 4, Circuit Breakers and TrackClean DELTA Q RED,16,W042 BRN,18,W069 GRN,18,W001 2.5A KEY SWITCH GRY-RED,12,W067 ORN-VIO,12,W074 X44A VIO,18,W093 SPL-6 VACUUM MOTOR BRN,18,W028 BLK,18,W133 RED,18,W040 GRY,18,W037 GRY,18,W036 GRY,18,W035 SPL-8 VIO-WHT,18,W034 VIO-WHT,18,W031 VIO-WHT,18,W033 SPL-7 WHT-RED,12,W066 RED-BRN,12,W071 VIO-WHT,18,W060... -
Page 54: Sheet 5, Trackclean Adapter Harnesses
Service Manual – SC901 24 - Electrical System Sheet 5, TrackClean Adapter Harnesses Notes About TrackClean Options: • When no TrackClean module is present, a simple jumper/connector is installed to return the KSI signal back to the machine for normal operation •... -
Page 55: Specifications
Service Manual – SC901 24 - Electrical System Specifications Connector Pinouts TrackClean Connector Pin # Name Wire Color, ID Interlock VIO, W093 Interlock BRN/VIO, W026 Batt+ RED, W040 Vacuum GRAY, W035 Scrub VIO/WHT, W031 Drive PINK/BLUE, W023 Key Switch BRN/VIO, W026 Batt- BLACK, W030 EcoFlex Connector... -
Page 56: Drive Controller Connector
Service Manual – SC901 24 - Electrical System Drive Controller Connector Pin # Name Wire Color, ID Pot High WHT, W019 Throttle Pot BLU, W059 VIO, W011 Brake- PNK-BLU, W023 Pot Low YEL, W058 Brake+ PNK, W137 Reverse GRY-VIO, W018 Speed Pot ORN, W020... -
Page 57: 30 - Solution System
Service Manual – SC901 30 - Solution System Functional Description The SC901 machine has a 29 5-gallon (112 liter) solution tank incorporated into the main body of the machine. A clear tube on the right side of the machine below the fill cap serves as a water level indicator for the tank At the outlet of the solution tank, under the machine, is a manual shutoff valve followed by a serviceable solution filter that prevents debris from entering the rest of the solution system. -
Page 58: Detergent Models
Service Manual – SC901 30 - Solution System Detergent Models 36 VDC Machines that have on-board detergent mixing (EcoFlex Models) have a solution control circuit board, detergent pump, SW, SPST KEY and detergent bottle From an enabling CURTIS 1228 standpoint, the detergent module (circuit board) has the same prerequisite control PNK/BLU BRAKE+... -
Page 59: Troubleshooting
Service Manual – SC901 30 - Solution System Troubleshooting Scrub System, General One of the first things about troubleshooting any part of the scrub system, is to make the scrub system active, so you can make observations It is possible to active the scrub system without the machine moving, and without the brushes contacting the floor. -
Page 60: No Solution Flow
Service Manual – SC901 30 - Solution System No Solution Flow • Make sure the solution shutoff valve is open • For a non-EcoFlex machine, make sure the solution cable is connected to the valve and moves through its full cycle as the solution lever is moved •... -
Page 61: Removal And Installation
Service Manual – SC901 30 - Solution System Removal and Installation Scrub Skirt Removing the scrub skirt (B) allows easy access to the scrub deck components It is held in place with 4 screws (A) on the sides, and a tab in the center Using a 3mm hex key, remove the 4 screws and washers (A) Slide the skirt toward the front to free the center... -
Page 62: Solution Filter
Service Manual – SC901 30 - Solution System Solution Filter Shutoff the solution valve (B) Unscrew the solution filter (A) There will likely still be some liquid in the line that will spill out Clean the filter bowl and screen (C) Note that the screen is not removable from the bowl... -
Page 63: Solution Control Panel And Cable
Service Manual – SC901 30 - Solution System Solution Control Panel and Cable The solution control panel is located to the right of the operator’s handle, and the cable passes down through the machine to the solution shutoff valve Remove the cable clamp (A) Remove the screw, nut, and washer (B) that secures the cable to the solution shutoff valve... -
Page 64: Ecoflex Control Panel
Service Manual – SC901 30 - Solution System EcoFlex Control Panel For machines equipped with the option EcoFlex system, the standard solution control panel is replaced with the EcoFlex control panel Remove the 4 screws that secure the control panel to the solution tank, and lift the panel away from the tank Disconnect the electrical connector, and remove the control panel... -
Page 65: 34 - Scrub System, Disc
Service Manual – SC901 34 - Scrub System, Disc Functional Description The scrub system consists of a scrub deck that is raised and lowered with a foot pedal at the rear of the machine The two counter rotating brushes are driven by independent motors with integral speed reduction gear boxes The scrub deck is supported by a parallelogram linkage to maintain level with the floor at any... -
Page 66: Circuit Overview
Service Manual – SC901 34 - Scrub System, Disc Circuit Overview 36 VDC The brush circuit has several prerequisites to operate All of the following must to be true for the brushes to run: SW, SPST KEY CURTIS 1228 • Key switch on •... -
Page 67: Troubleshooting
Service Manual – SC901 34 - Scrub System, Disc Troubleshooting Scrub System, General One of the first things about troubleshooting any part of the scrub system, is to make the scrub system active, so you can make observations It is possible to active the scrub system without the machine moving, and without the brushes contacting the floor. -
Page 68: One Brush Not Working
Service Manual – SC901 34 - Scrub System, Disc One Brush Not Working If only one brush is not working, you know it is not related to the drive controller, nor the power relay (K2) The problem is isolated between the 25 amp circuit breaker and the motor •... -
Page 69: Removal And Installation
Service Manual – SC901 34 - Scrub System, Disc Removal and Installation Scrub Skirt Removing the scrub skirt (B) allows easy access to the scrub deck components It is held in place with 4 screws (A) on the sides, and a tab in the center Using a 3mm hex key, remove the 4 screws and washers (A) Slide the skirt toward the front to free the center... -
Page 70: Brush Motor Brushes
Service Manual – SC901 34 - Scrub System, Disc Brush Motor Brushes Unless you need to remove the motor(s), it is easier to complete this procedure with the motor(s) installed in the machine As long as you disconnected the main battery connector, you don’t even need to disconnect the motor connector But if desired, remove the Scrub Brush Motor described on page 69... - Page 71 Service Manual – SC901 34 - Scrub System, Disc 10 Remove the terminal screw (J) from the brush wire 11 Pull the brush (F) outward and remove it from the brush holder (G) 12 While holding the coil spring out of the way, insert the new brush into the brush holder Note that the brush wire is away from the phenolic base 13 Re-secure the brush wire to the contact with the screw...
-
Page 72: Specifications
Service Manual – SC901 34 - Scrub System, Disc Specifications Parameter Range K2 Brush Relay Coil Resistance 118 Ω Sample Left Brush Amps 2.44A, No Load Sample Right Brush Amps 2.65A, No Load... -
Page 73: 34 - Scrub System, Cylindrical
Service Manual – SC901 34 - Scrub System, Cylindrical Functional Description The scrub system consists of a scrub deck that is raised and lowered with a foot pedal at the rear of the machine The two counter rotating cylindrical brushes are driven by independent motors and belt drives The scrub deck is supported by a parallelogram linkage to maintain level with the floor at any... -
Page 74: Circuit Overview
Service Manual – SC901 34 - Scrub System, Cylindrical Circuit Overview 36 VDC The brush circuit has several prerequisites to operate All of the following must to be true for the brushes to run: SW, SPST KEY CURTIS 1228 • Key switch on •... -
Page 75: Troubleshooting
Service Manual – SC901 34 - Scrub System, Cylindrical Troubleshooting Scrub System, General One of the first things about troubleshooting any part of the scrub system, is to make the scrub system active, so you can make observations It is possible to active the scrub system without the machine moving, and without the brushes contacting the floor. -
Page 76: One Brush Not Working
Service Manual – SC901 34 - Scrub System, Cylindrical One Brush Not Working If only one brush is not working, you know it is not related to the drive controller, nor the power relay (K2) The problem is isolated between the 25 amp circuit breaker and the motor •... -
Page 77: Removal And Installation
Service Manual – SC901 34 - Scrub System, Cylindrical Removal and Installation Scrub Skirt Removing the scrub skirt (B) allows easy access to the scrub deck components It is held in place with 4 screws (A) on the sides, and a tab in the center Using a 3mm hex key, remove the 4 screws and washers (A) Slide the skirt toward the front to free the center... -
Page 78: Brush Motor Brushes
Service Manual – SC901 34 - Scrub System, Cylindrical Brush Motor Brushes Drain the recovery tank and disconnect the main battery connector Remove the Scrub Skirt described on page 77 Remove the Scrub Brush Motor described on page 77 Remove both scrub brushes Important: Using a marker or paint pen, mark the alignment (A) of the top and bottom end caps with respect to the motor housing (D) - Page 79 Service Manual – SC901 34 - Scrub System, Cylindrical Note: When placing the coil spring and brush back into position, note the direction the coil spring faces so that it uncoils properly. Note: You will need 4 temporary retaining pins, such as straightened out paperclips.
- Page 80 Service Manual – SC901 34 - Scrub System, Cylindrical Note: The wave washer (J) fits between the rotor bearing and the end cap. When placing it in the end cap before assembly, note that the fingers (K) face toward the bearing. The picture to the right is only for reference.
-
Page 81: Specifications
Service Manual – SC901 34 - Scrub System, Cylindrical Specifications Parameter Range K2 Brush Relay Coil Resistance 118 Ω Sample Left Brush Motor Amps 2.84A, No Load Sample Right Brush Motor Amps 2.48A, No Load... -
Page 82: 38 - Squeegee System
Service Manual – SC901 38 - Squeegee System Functional Description The squeegee tool collects wastewater from the floor for the recovery system to lift the water into the recovery tank. The floor squeegee is wider than the swath of the scrub deck to ensure collection of all wastewater from the perimeter of the scrubbing area The squeegee also pivots to the side to permit operation near walls and... -
Page 83: Maintenance And Adjustment
Service Manual – SC901 38 - Squeegee System Maintenance and Adjustment Squeegee Blade Cleaning and Inspection Periodically clean and inspect the squeegee assembly and blades Loosen the two thumb nuts (A), and slide the squeegee assembly off the lift mechanism Clean the squeegee blades (B&C) and suction area between the blades (D) with soap and water... -
Page 84: Removal And Installation
Service Manual – SC901 38 - Squeegee System Removal and Installation Squeegee Blade Replacement Remove the squeegee assembly from the machine Release the rear (main) squeegee latch (B) by pushing back on the latch release (A) and pulling the latch outward Remove the tension strap (C) from the end hooks, and remove the squeegee blade (D) The squeegee blade has 4 working edges Turn... -
Page 85: 40-Recovery System
Service Manual – SC901 40-Recovery System Functional Description Recovery The recovery system extracts wastewater from Tank the floor and deposits it into the on-board Suction Inlet recovery tank Vacuum Motor and Recovery Tank The vacuum motor generates airflow through the recovery tank and suction hose to the squeegee The high velocity air at the squeegee pulls the wastewater off the floor and up through the... -
Page 86: Circuit Overview
Service Manual – SC901 40-Recovery System Circuit Overview 36 VDC Unlike other machine functions, the vacuum circuit is not dependant on the drive function nor the low voltage cutout of the hour meter The only prerequisite for the vacuum circuit is SW, SPST KEY TELEMATICS the main key switch... -
Page 87: Vacuum Suction Test
Service Manual – SC901 40-Recovery System Vacuum Suction Test Use this procedure to verify that the vacuum system is performing within factory specifications. This procedure can also be used to isolate the cause of a vacuum problem between a clog or leak It is a two-part procedure that verifies both static pressure and flow rate. -
Page 88: Removal And Installation
Service Manual – SC901 40-Recovery System Removal and Installation Vacuum Motor Drain the recovery tank and move it to the open position Disconnect the vacuum motor cable connector (C) Loosen the hose clamp (A) on the exhaust hose, and remove the hose Remove the three screws and washers (B) that secure the vacuum retaining plate (D), and remove the plate and motor Take care... -
Page 89: Vacuum Motor Brushes
Service Manual – SC901 40-Recovery System Vacuum Motor Brushes Remove the Vacuum Motor described on page 88 Remove the two screws (A) that secure the motor cover to the motor, and remove the cover Remove the two screws (C) that secure the contact strap (D), and remove the strap Take care to not bend the wire any more than necessary... -
Page 90: Specifications
Service Manual – SC901 40-Recovery System Specifications Parameter Range K3 Vac Relay Coil Resistance 105 Ω Sample Vacuum Motor Amps 17.5 to 18.3 Amps, Open hose, no squeegee. Note that the less restricted the air flow, the higher the amps should be. Special Tools Vacuum Pressure Gauge 1-inch open hole adapter... -
Page 91: 90 - Options And Accessories
Service Manual – SC901 90 - Options and Accessories 90 - Options and Accessories The SC901 machine may be equipped with optional accessories depending on the needs of the owner Some of these accessories don’t directly impact servicing the machine, but some may So it is good to know what accessories you may encounter and how they impact the machine Onboard Charger The onboard battery charger is located in front of the battery bay The charger connects directly to the...
Need help?
Do you have a question about the 56115530 and is the answer not in the manual?
Questions and answers