Nilfisk-Advance Convertamatic 260B User manual

8/93 revised 12/00 Form Number 56043021
Convertamatic
™
260B/32B/32BD/38BD
SERVICE MANUAL
Advance MODELS 56372450(260B), 56395700(32B)
56395710(32BD), 56395720(38BD)
56372460(260BHD), 56395715(320BHD), 56395725(380BHD)
Hydro-Retriever
™
260BHD/320BHD/380BHD

56043021 - 260, 32, 38, 320, 380
TABLE OF CONTENTS
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Batteries.........................................................................................................53
Brush Drive Belt Adjustment - 32, 38, 320, 380 .............................................16
Brush Drive Belt Adjustment - 260 .................................................................14
Brush Drive Motor - Carbon Brush Inspection - 260 ......................................17
Brush Drive Motor - Carbon Brush inspection - 32, 38, 320, 380 ..................19
Brush Drive Motor Replacement - 32, 38, 320, 380.......................................22
Brush Drive Motor Replacement - 260...........................................................20
Brush Drive System Maintenance..................................................................14
Brush Drive System Troubleshooting.............................................................31
Caster Replacement ......................................................................................51
Differential Removal - 32BD, 38BD, 320BHD, 380BHD ................................49
Drive Belt Removal - 32BD, 38BD, 320BHD, 380BHD..................................45
Drive System Maintenance ............................................................................45
Drive System Troubleshooting - 32BD, 38BD, 320BHD, 380BHD.................52
Drive Wheel Removal - 32BD, 38BD, 320BHD, 380BHD..............................47
Main Wheel Removal - 32B ...........................................................................48
Main Wheel Removal - 260............................................................................47
Pressure Arm Bearing Replacement - 32, 38, 320, 380 ................................26
Pressure Arm Bearing Replacement - 260 ....................................................24
Propelling Linkage Adjustment - 32, 38, 320, 380 .........................................29
Propelling Linkage Adjustment - 260 .............................................................28
Safety.............................................................................................................. 1

56043021 - 260, 32, 38, 320, 380
Solution Cable Replacement - 32, 38, 320, 380 ............................................12
Solution Cable Replacement - 260 ................................................................10
Solution System Maintenance .........................................................................6
Solution System Troubleshooting ..................................................................13
Solution Valve Replacement - 32, 38, 320, 380 ...............................................8
Solution Valve Replacement - 260 ...................................................................6
Specifications & Maintenance..........................................................................3
Squeegee Adjustment - Curved .....................................................................40
Squeegee Adjustment - Straight ....................................................................39
Squeegee Blade Replacement - Curved .......................................................43
Squeegee Blade Replacement - Straight.......................................................41
Vacuum Motor - Carbon Brush Inspection - 32, 38, 320, 380 ........................35
Vacuum Motor - Carbon Brush Inspection - 260 ............................................33
Vacuum Motor Removal - 32, 38, 320, 380 ...................................................38
Vacuum Motor Removal - 260 .......................................................................36
Vacuum System Maintenance .......................................................................32
Vacuum System Troubleshooting ..................................................................44
Note: All references to right, left, front, or rear in this manual are as seen from the operator’s stand-point.
TABLE OF CONTENTS
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56043021 - 260, 32, 38, 320, 380
SAFETY
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SYMBOLS
Advance uses the symbols below to signal potentially dangerous conditions. Always read this information
carefully and take the necessary steps to protect personnel and property.
DANGER!
Is used to warn of immediate hazards that will cause severe personal injury or death.
WARNING!
Is used to call attention to a situation that could cause severe personal injury.
CAUTION!
Is used to call attention to a situation that could cause minor personal injury or damage to the machine or other
property..
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GENERAL SAFETY INSTRUCTIONS
Specific Cautions and Warnings are included to warn you of potential danger of machine damage or bodily
harm.
WARNING!
Keep sparks, flame and smoking materials away from the batteries. Explosive gasses are vented during
normal operation.
Remove all jewelry when working near electrical components.
Turn the Main Switch OFF and disconnect one of the battery terminals when servicing electrical components.
Never work under a machine without safety stands or blocks 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.
1

56043021 - 260, 32, 38, 320, 380
CAUTION!
Before performing any service function, carefully read all instructions pertaining to that service function.
Take precautions to prevent hair, jewelry, or loose clothing from becoming caught in moving parts.
Keep the Battery Compartment OPEN while charging the battery. Charging produces highly explosive hydro-
gen gas. Charge only in well-ventilated areas, away from open flame. Do not smoke while charging the
battery.
Use caution when moving the machine in below freezing temperature conditions. Any water in the solution or
recovery tanks or in the hose lines could freeze.
Do not leave the machine unattended without first turning the Main Switch OFF and applying the Parking
Brake (if applicable).
Turn the Main Switch OFF before changing the brushes.
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GENERAL SAFETY INSTRUCTIONS (continued...)
SAFETY
2

56043021 - 260, 32, 38, 320, 380
SPECIFICATIONS
3
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SPECIFICATIONS - 260
Dimensions English (Metric)
Scrub Brush Diameter 13 inches (33 cm)
Scrub Brush Path 25 inches (63.5 cm)
Scrub Brush Pressure 120 lbs (55 kg) - float position
185 lbs (84 kg) - first notch
215 lbs (98 kg) - second notch
Scrub Brush Speed 150 to 180 rpm (150 to 180 rpm)
Machine Length 53.5 inches (136 cm)
Machine Width 27 inches (67 cm)
Machine Height 43 inches (109 cm)
Wheels/Casters two 8" X 1.6" (20 cm X 4 cm) front wheels
one 4" X 2" (10 cm X 5 cm) swivel rear caster
Solution Tank Capacity 18 gal (68 litre)
Recovery Tank Capacity 18 gal (68 litre)
Machine Weight 438 lbs (199 kg) w/o batteries
702 lbs (318 kg) w 220 AH batteries
733 lbs (332 kg) w 244 AH batteries
Battery Weight 65 lbs (30 kg) each 220 AH battery
73 lbs (33 kg) each 244 AH battery
Battery Dimensions
Height 10.63 inches (27 cm) each 220 AH battery
Width 7.06 inches (18 cm) each 220 AH battery
Length 10.25 inches (26 cm) each 220 AH battery
Height 11.5 inches (29 cm) each 244 AH battery
Width 7.06 inches (18 cm) each 244 AH battery
Length 10.38 inches (26 cm) each 244 AH battery
Battery Compartment Dimensions
Height 11.75 inches (30 cm)
Width 15 inches (38 cm)
Length 21 inches (53 cm)
General Specifications
Brush Motor 24 volt, 1 hp dc motor
Vacuum Motor 24 volt, 3/4 hp dc motor
Squeegee Type Forward/reverse cartridge style - 260B
4 sided, curved, self tracking - 260BHD
Propulsion Means Power-Flo™ drive, brush/pad assisted fwd/rev
Battery Requirements (4) 6 volt deep cycle, 220 or 244 AH
Battery Charger Requirements 24V/20 amp (p/n 372947)
Vacuum Waterlift (sealed) 44 inches (112 cm)
Sound Level 71 dbA (decibels) at operator position
Run Time Per Charge 2.5 hours/220 amp hour batteries
2.8 hours/244 amp hour batteries

56043021 - 260, 32, 38, 320, 380
SPECIFICATIONS
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SPECIFICATIONS - 32, 38, 320, 380
Dimensions English (Metric)
Scrub Brush Diameter 17 inches (43 cm) - 32 &320
20 inches (50 cm) - 38 & 380
Scrub Brush Pressure 150 to 225 lbs (68 to 102 kg) - 32 & 320
150 to 250 lbs (68 to 113 kg) - 38 & 380
Scrub Brush Speed 120 rpm (120 rpm) - 32 & 320
105 rpm (105 rpm) - 38 & 380
Machine Length 52 inches (132 cm)
Machine Width 34 inches (86 cm) - 32 & 320
40 inches (102 cm) - 38 & 380
Machine Height 43.5 inches (111 cm)
Solution Tank Capacity 28 gal (106 litre)
Recovery Tank Capacity 28 gal (106 litre)
Machine Weight 569 lbs (258 kg) w/o batteries - 32B
627 lbs (284 kg) w/o batteries - 32BD, 320BHD
641 lbs (290 kg) w/o batteries - 38BD, 380BHD
1018 lbs (462 kg) w batteries - 32B
1076 lbs (488 kg) w batteries - 32BD, 320BHD
1090 lbs (494 kg) w batteries - 38BD, 380BHD
Battery Weight 73 lbs (33 kg) each 244 AH battery
Battery Dimensions
Height 11.5 inches (29 cm) each 244 AH battery
Width 7.06 inches (18 cm) each 244 AH battery
Length 10.38 inches (26 cm) each 244 AH battery
General Specifications
Brush Motor 36 volt, 2 1/4 hp dc motor
Vacuum Motor 36 volt, 3/4 hp dc motor
Squeegee Type Forward/reverse cartridge style - 32B, 32BD,
38BD
4 sided, curved, self tracking - 320BHD, 380BHD
Battery Requirements (6) 6 volt deep cycle, 244 AH
Battery Charger Requirements 36 V/20 amp (p/n 395101)
Run Time Per Charge 3.7 hours
Propulsion Means Power-Flo™ drive, brush/pad assisted fwd/rev
Transport Drive Take off from gear box drives wheels - 32BD,
38BD, 320BHD, 380BHD
4

56043021 - 260, 32, 38, 320, 380
MAINTENANCE
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MAINTENANCE SCHEDULE
MAINTENANCE ITEM DAILY WEEKLY MONTHLY YEARLY
Clean Tanks •
Clean Vacuum Shut-Off Float •
Clean Squeegee •
Charge Batteries •
Check Battery Water Level •
* Lubrication / Grease •
** Lubrication / Oil •
Service Vacuum Motor •
* Lubricate these items every month with grease...
1(2) pressure arm bearings
2(2) main wheel bearings (260 / 32B)
3(4) differential bearings, (2) intermediate shaft bearings (32BD, 38BD, 320BHD, 380BHD)
4Caster swivel and wheel bearings (if applicable)
** Lubricate these items every two months with oil...
1Tank hinges
2Squeegee lever pivot linkage
3Control handle pivot points
4Front skirt locks
5Front skirt hinges
6Solution lever linkage
7Propelling linkage
5

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
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MAINTENANCE
The solution system should be flushed every day to prevent a build-up of soap residue in the solution valve.
To flush the solution system . . .
1Park the machine near a floor drain and open the solution valve.
2When the tank is empty, close the solution valve and put about 2 inches (5 cm) of clean, warm water in
the solution tank.
3Move the solution lever to the full-on position, and allow all of the water to drain through the solution
valve.
4Close the solution valve before refilling the solution tank.
5Check to make sure that the solution tank screen is not plugged (32, 38, 320, 380).
6The solution filter is flushed when ever the solution tank is drained through the drain hose (260).
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SOLUTION VALVE REPLACEMENT - 260
1Drain both the solution and recovery tanks.
2Tip the solution tank forward and remove the recovery tank from the machine.
3Remove the vacuum motor hose for easier access to the solution valve.
4See Figure 1. Disconnect hose “A” from the top of solution valve “B”.
5Disconnect solution cable “C” from the solution valve arm (do not loose the bushing).
6Remove the (2) “D” bolts and nuts holding the solution valve to its mount.
7Disconnect the (2) “E” solution hoses and remove solution valve “B” from the machine.
8Remove all of the fittings from the old solution valve and install them on the new one.
9Follow steps 1-7 in reverse order to reassemble.
10 Test for leaks and proper operation.
6

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
FIGURE 1
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SOLUTION VALVE REPLACEMENT - 260 (continued...)
A
EFront
E
D
C
B
D
7
Solution Filter

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
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SOLUTION VALVE REPLACEMENT - 32, 38, 320, 380
1Move the machine to a floor drain and drain the solution tank by opening the solution valve.
2Remove the right side skirt and the right side brush.
3See Figure 2. Disconnect the (2) “F” solution hoses.
4Remove the (2) “G” screws holding the valve bracket to the chassis.
5Pull the solution valve down and disconnect solution cable “H” from the valve arm (do not loose the
bushing).
6Disconnect main solution hose “I” and remove the solution valve from the machine.
7Remove the old solution valve from the bracket and remove all of the fittings.
8Install the fittings on the new solution valve and mount the valve to the bracket.
9Follow steps 1-6 in reverse order to reassemble.
10 Test for leaks and proper operation.
8

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
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SOLUTION VALVE REPLACEMENT - 32, 38, 320, 380 (continued...)
FIGURE 2
I
Front
G
F
H
F
9

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 260
1Drain the solution and recovery tanks.
2Tip the solution tank forward and remove the recovery tank from the machine.
3Remove the vacuum motor hose for easier access.
4See Figure 3. Disconnect solution cable “J” from the solution valve arm.
5Remove the solution cable from the chassis mount (take note of its location in the mount).
6Remove the control handle panel.
7Remove the solution cable from the handle mount (take note of its location in the mount).
8Disconnect solution cable “J” from the solution lever.
9Pull the cable out through the back of the control handle.
10 Reassemble in reverse order and test for proper operation.
10

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
FIGURE 3
Front
Solution Lever
J
Handle Mount
Solution
Valve Arm
J
Chassis Mount
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SOLUTION CABLE REPLACEMENT - 260 (continued...)
11

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 32, 38, 320, 380
1Drain the solution and recovery tanks.
2Remove the right side skirt and right side brush. Lower the brush drive.
3See Figure 4. Disconnect the (2) “K” solution hoses.
12
4Remove the (2) “L” screws holding the valve bracket to the chassis.
5Pull the solution valve down and disconnect solution cable “M” from the valve arm (do not loose the
bushing).
FIGURE 4
Front
N
M
Chassis
Mounts
M
L
K
K

56043021 - 260, 32, 38, 320, 380
SOLUTION SYSTEM
6Remove the solution cable from the chassis mount (take note of its location in the mount).
7Tip the solution and recovery tanks to the sides of the machine.
8Remove the access panel from the front side of the control panel.
9Disconnect solution cable “M” from solution lever “N”.
10 Remove the solution cable from the chassis mount (take note of its location in the mount).
11 Work the solution cable up and out of the machine.
12 Reassemble in reverse order and test for proper operation.
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TROUBLESHOOTING
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Problem: Not Enough Solution Flow To The Scrub Brushes
1Kinked solution hoses.
2Solution valve cable needs adjustment.
3Plugged screen in the solution tank (32, 38, 320, 380).
4Plugged solution filter (260 / see figure 1).
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Problem: Solution Leaks With The Valve In The Off Position
1Solution valve cable needs adjustment.
2Solution valve defective.
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Problem: More Solution Flow To One Brush Than The Other
1Kinked solution hoses.
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SOLUTION CABLE REPLACEMENT - 32, 38, 320, 380 (continued...)
13

14 - 56043021 - 260, 32, 38, 320, 380
BRUSH DRIVE SYSTEM
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MAINTENANCE
Once a month . . .
1Lubricate the (2) pressure arm bearings.
Every 6 months . . .
1Check the belt tension. There should be about 3/32 inch (2 mm) of belt deflection when 3-1/4 pounds of
pressure is applied between the pulleys.
2Grease the guide bushings for the brush pressure control lever.
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 (10 mm) or less.
2Remove the fill plug from the top of the gear box and check the oil level. The oil should be 1-1/2 inches
(3.8 cm) from the top of the gear box. Use 140W gear lube only.
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BRUSH DRIVE BELT ADJUSTMENT - 260
1Open the front access door.
2See Figure 1. Loosen the (2) “A” bolts.
3Turn the (2) large “B” bolts an equal amount of turns each to loosen or tighten the belt. If you are remov-
ing the belt, loosen the tension and remove the belt.
4There should be about 3/32 inch (2 mm) of belt deflection when 3-1/4 pounds of pressure is applied
between the pulleys.
5Tighten the (2) “A” bolts and test for proper operation.

56043021 - 260, 32, 38, 320, 380 - 15
BRUSH DRIVE SYSTEM
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BRUSH DRIVE BELT ADJUSTMENT - 260 (continued...)
FIGURE 1

16 - 56043021 - 260, 32, 38, 320, 380
BRUSH DRIVE SYSTEM
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BRUSH DRIVE BELT ADJUSTMENT - 32, 38, 320, 380
FIGURE 2
1Drain the solution and recovery tanks and tip
them to the sides of the machine.
2Open the front access door.
3See Figure 2. Loosen the (2) “C” bolts.
4Remove the belt guard.
5Turn the (2) large “D” bolts an equal amount
of turns each to loosen or tighten the belt. If
you are removing the belt, loosen the tension
and remove the belt.
6There should be about 3/32 inch (2 mm) of
belt deflection when 3-1/4 pounds of pressure
is applied between the pulleys.
7Reassemble in reverse order and test for
proper operation.

56043021 - 260, 32, 38, 320, 380 - 17
BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR - CARBON BRUSH INSPECTION - 260
1Drain and remove the solution and recovery tanks and disconnect the batteries.
2See Figure 3. Remove access panel “E” from under the solution tank.
FIGURE 3