Nilfisk-Advance BA 500 User manual

Model 66324400 12/94 Form Number 043023
NILFISK BA 500
Service Manual
ORDER PARTS
Online: www.ivie-ent.com
Phone: [phone]

TABLE OF CONTENTS
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Batteries .................................................................................................................21
Brush Drive Belt Adjustme t Or Replaceme t .........................................................7
Brush Drive Motor - Carbo brush I spectio ......................................................... 8
Brush Drive Motor Replaceme t ............................................................................. 8
Brush Drive System Mai te a ce ............................................................................7
Brush Drive System Troubleshooti g .....................................................................10
Differe tial Replaceme t ........................................................................................16
Pote tiometer Adjustme t ......................................................................................20
Safety .......................................................................................................................1
Sole oid Valve - Removal / Disassembly & Clea i g ..............................................4
Solutio System Mai te a ce..................................................................................4
Solutio System Troubleshooti g.............................................................................6
Specificatio s & Mai te a ce ..................................................................................2
Squeegee Adjustme t ............................................................................................13
Vacuum Motor Removal .........................................................................................12
Vacuum System Mai te a ce................................................................................11
Vacuum System Troubleshooti g...........................................................................14
Wheel Drive Chai - Replaceme t Or Adjustme t .................................................17
Wheel Drive Motor Replaceme t ...........................................................................17
Wheel Drive System Troubleshooti g ....................................................................18
Note: All refere ces to right, left, fro t, or rear i this ma ual are as see from the operator’s sta d-poi t.

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SYMBOLS
Nilfisk uses the symbols below to sig al pote tially da gerous co ditio s. Always read this i formatio
carefully a d take the ecessary steps to protect perso el a d property.
DANGER!
Is used to war of immediate hazards that will cause severe perso al i jury or death.
WARNING!
Is used to call atte tio to a situatio that could cause severe perso al i jury.
CAUTION!
Is used to call atte tio to a situatio that could cause mi or perso al i jury or damage to the machi e or other
property.
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GENERAL SAFETY INSTRUCTIONS
WARNING!
Keep sparks, flame a d smoki g materials away from the batteries. Explosive gases are ve ted duri g
ormal operatio .
Remove all jewelry whe worki g ear electrical compo e ts.
Disco ect o e of the battery termi als whe servici g electrical compo e ts.
Never work u der a machi e without safety sta ds or blocks to support the machi e.
CAUTION!
Carefully read all i structio s pertai i g to a service fu ctio before performi g that fu ctio .
Take precautio s to preve t hair, jewelry, or loose clothi g from becomi g caught i movi g parts.
SAFETY
1 BA 500 Service Ma ual

SPECIFICATIONS
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SPECIFICATIONS
Dimensions English (Metric)
Scrub Brush Diameter 20 inches (51 cm)
Scrub Brush Path 20 inches (51 cm)
Scrub Brush Pressure 70 lbs (32 kg)
Scrub Brush Speed 190 rpm (190 rpm)
S ueegee Size 25.5 inches (65 cm)
Machine Length 44 inches (112 cm)
Machine Width 21.75 inches (55 cm)
Machine Height 43.5 inches (110 cm)
Drive Wheel 8 inch (20 cm) soft ride wheels
Solution Tank Capacity 12 gal (45i)
Recovery Tank Capacity 12 gal (45i)
Coverage Rate 7,500 s ft (697 m2) per hour
Machine Weight 266 lbs (121 kg) net w/o batteries
558 lbs (253 kg) w/four 244 AH batteries
376 lbs (175 kg) w/two 93 AH batteries
350 lbs (159 kg) shipping weight
General Speci ications
Brush Motor 24 volt, 1/2 hp dc motor
Wheel Drive Motor 24 volt, 1/4 hp dc motor
Vacuum Motor 24 volt, 3/4 hp dc motor
Brush Drive Belt drive
Sound Level 68.2 db (A) @ 3 ft (.9m) using pads
68.9 db (A) using prolene scrub brushes
S ueegee Type 4 sided, curved, pivot type
Speed Control Electronic, fully variable forward/reverse
Batteries (4) 6 volt 244 AH (std)
(2) 12 volt 93 AH (opt)
BA 500 Service Manual 2

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MAINTENANCE CHART
Once a Once a Once a
MAINTENANCE ITEM Daily Week Month Year
Clean and inspect the tanks and hoses X
Clean the brushes and pads X
Clean the s ueegee X
Charge the batteries X
Check battery water level X
Lubrication X
Vacuum motor carbon brushes X
MAINTENANCE
3 BA 500 Service Manual
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Phone: [phone]

SOLUTION SYSTEM
1Remove the vacuum motor. See
Vacuum System chapter for instruc-
tions.
2Disconnect the solution valve and
mercury switch wiring connectors.
3See Figure 1. Remove hoses “A” and
“ ”.
4Remove (2) bolts “C” and remove the
solution valve and bracket from the
machine.
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MAINTENANCE
The solution system should be thoroughly flushed once a week. To flush the solution system...
1Empty the solution tank, using the clear plastic drain hose on back of machine. This automatically
flushes loose dirt from solution filter.
2Put clean, warm water into the solution tank and let it drain through the drain hose.
3Put the plug in the drain hose and put about 2 inches of clean water in the solution tank.
4Put the machine controls in the following positions:
• Key Switch - ON
• Solution Switch (on left side of handle) - ON
• rush drive lowered
• Twist Grips - Forward
• Flow control lever (on right side of control handle) UP
• Let all of the clean water flow from the tank. This will flush dirt and soap residue from the electric sole-
noid valve and the flow control valve.
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SOLENOID VALVE REMOVAL
C
A
FIGURE 1
Front
BA 500 Service Manual 4

SOLUTION SYSTEM
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SOLENOID VALVE DISASSEMBLY AND CLEANING
1Remove the solenoid valve. See the Solenoid Valve Removal section for instructions.
2See Figure 2. Remove the (2) “D” screws and nuts and disassemble the valve (be careful not to lose any
internal parts).
3Thoroughly wash dirt from block “E” and diaphram “F”.
4After reassembling, test the solenoid valve for proper operation.
D
D
FIGURE 2
EF
5 BA 500 Service Manual

SOLUTION SYSTEM
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TROUBLESHOOTING
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Probl m: No solution flow
Possibl Caus and R m dy:
1Machine controls not positioned properly. In order for solution to flow, the controls must be positioned as
follows:
• Key Switch - ON
• Solution Switch (on left side of handle) - ON
• rush drive lowered
• Twist Grips - Forward
• Flow control lever (on right side of control handle) UP
2Clogged Solution Filter. Drain solution tank, using the clear plastic drain hose on back of machine. This
automatically flushes loose dirt from solution filter. If solution still does not flow, remove and disassemble
the tee-fitting (under the solution tank), remove and clean the filter thoroughly.
3Clogged Solenoid Valve. Remove, disassemble, and clean the solenoid valve. See the Solenoid Valve
Disassembly and Cleaning section for instructions.
4Defective Speed Control. Replace speed control.
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Probl m: Solution leaks in “OFF” position
Possibl Caus and R m dy:
1Dirt in solenoid valve. Remove, disassemble, and clean the solenoid valve. See the Solenoid Valve
Disassembly and Cleaning section for instructions.
2Defective solenoid valve. Replace the solenoid valve. See the Solenoid Valve Removal section for
instructions.
BA 500 Service Manual 6

BRUSH DRIVE SYSTEM
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MAINTENANCE
Once every six months
1Check the belt tension, adjust if necessary.
Once a year
1Check the carbon brushes in the brush motor. Replace the brushes if they are worn to a length of 3/8
inch ( 0 mm) or less.
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BELT ADJUSTMENT OR REPLACEMENT
1Drain the solution and recovery tanks.
2See Figure . Tip the machine back as
shown and place a jack stand under the
front end.
3See Figure 2. Turn nut “A” counterclockwise to loosen the belt tension.
FIGURE 1
FIGURE 2
4Remove screw “B” and remove the idler assembly and the belt from the machine. Remove “E” bolts, and
remove the belt from the idler.
5Follow steps in reverse order to reassemble. Tighten nut “A” until the tension spring is 2 /2 inches (63.5
mm) long. Test the brush drive system to make sure it operates properly.
AD
E
C
D
C
B
Front
7 BA 500 Service Manual

BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR - CARBON BRUSH INSPECTION
1Remove the brush drive motor. See the Brush Drive Motor Replacement section for instructions.
2See Figure 3. Place the brush drive motor in a vice as shown. Be careful not to damage the pulley.
FIGURE 4FIGURE 3
3See Figure 4. Remove (2) “F” nuts and remove the end bell from the motor.
4Remove and measure the carbon brushes. If they are worn to 3/8 inch (9.66 mm) or shorter, replace
both carbon brushes. Remove all loose carbon and dirt from the inside of the motor.
5Follow steps -3 in reverse order to reassemble.
6Test the motor to make sure it operates properly.
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BRUSH DRIVE MOTOR REPLACEMENT
1Drain the solution and recovery tanks and remove the solution tank from the machine.
2Tip the recovery tank to the side and disconnect the batteries.
3Remove the vacuum motor. See the Vacuum System section for instructions.
4Disconnect the wires from the brush drive motor. Take note of which wire color goes to each terminal for
reassembly.
FF
BA 500 Service Manual 8