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Convertamatic™ 260B/32B/32BD/38BD
Hydro-Retriever™ 260BHD/320BHD/380BHD
SERVICE MANUAL
Advance MODELS 56372450(260B), 56395700(32B)
56395710(32BD), 56395720(38BD)
56372460(260BHD), 56395715(320BHD), 56395725(380BHD)
8/93 revised 12/00 Form Number 56043021
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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
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TABLE OF CONTENTS
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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.
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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.
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SAFETY
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GENERAL SAFETY INSTRUCTIONS (continued...)
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 hydrogen 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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SPECIFICATIONS
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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
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
4 sided, curved, self tracking - 260BHD
2.8 hours/244 amp hour batteries
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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
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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)
4 Caster swivel and wheel bearings (if applicable)
** Lubricate these items every two months with oil...
1 Tank hinges
2 Squeegee lever pivot linkage
3 Control handle pivot points
4 Front skirt locks
5 Front skirt hinges
6 Solution lever linkage
7 Propelling linkage
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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 . . .
1 Park the machine near a floor drain and open the solution valve.
2 When the tank is empty, close the solution valve and put about 2 inches (5 cm) of clean, warm water in
the solution tank.
3 Move the solution lever to the full-on position, and allow all of the water to drain through the solution
valve.
4 Close the solution valve before refilling the solution tank.
5 Check to make sure that the solution tank screen is not plugged (32, 38, 320, 380).
6 The solution filter is flushed when ever the solution tank is drained through the drain hose (260).
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SOLUTION VALVE REPLACEMENT - 260
1 Drain both the solution and recovery tanks.
2 Tip the solution tank forward and remove the recovery tank from the machine.
3 Remove the vacuum motor hose for easier access to the solution valve.
4 See Figure 1. Disconnect hose “A” from the top of solution valve “B”.
5 Disconnect solution cable “C” from the solution valve arm (do not loose the bushing).
6 Remove the (2) “D” bolts and nuts holding the solution valve to its mount.
7 Disconnect the (2) “E” solution hoses and remove solution valve “B” from the machine.
8 Remove all of the fittings from the old solution valve and install them on the new one.
9 Follow steps 1-7 in reverse order to reassemble.
10 Test for leaks and proper operation.
6
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SOLUTION SYSTEM
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SOLUTION VALVE REPLACEMENT - 260 (continued...)
FIGURE 1
A
Solution Filter
D
Front
E
D
E
C
B
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SOLUTION SYSTEM
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SOLUTION VALVE REPLACEMENT - 32, 38, 320, 380
1 Move the machine to a floor drain and drain the solution tank by opening the solution valve.
2 Remove the right side skirt and the right side brush.
3 See Figure 2. Disconnect the (2) “F” solution hoses.
4 Remove the (2) “G” screws holding the valve bracket to the chassis.
5 Pull the solution valve down and disconnect solution cable “H” from the valve arm (do not loose the
bushing).
6 Disconnect main solution hose “I” and remove the solution valve from the machine.
7 Remove the old solution valve from the bracket and remove all of the fittings.
8 Install the fittings on the new solution valve and mount the valve to the bracket.
9 Follow steps 1-6 in reverse order to reassemble.
10 Test for leaks and proper operation.
8
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SOLUTION SYSTEM
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SOLUTION VALVE REPLACEMENT - 32, 38, 320, 380 (continued...)
FIGURE 2
Front
I
G
H
F
F
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SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 260
1 Drain the solution and recovery tanks.
2 Tip the solution tank forward and remove the recovery tank from the machine.
3 Remove the vacuum motor hose for easier access.
4 See Figure 3. Disconnect solution cable “J” from the solution valve arm.
5 Remove the solution cable from the chassis mount (take note of its location in the mount).
6 Remove the control handle panel.
7 Remove the solution cable from the handle mount (take note of its location in the mount).
8 Disconnect solution cable “J” from the solution lever.
9 Pull the cable out through the back of the control handle.
10 Reassemble in reverse order and test for proper operation.
10
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SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 260 (continued...)
FIGURE 3
Solution Lever
Front
J
Chassis Mount
Handle Mount
Solution
Valve Arm
J
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SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 32, 38, 320, 380
1 Drain the solution and recovery tanks.
2 Remove the right side skirt and right side brush. Lower the brush drive.
3 See Figure 4. Disconnect the (2) “K” solution hoses.
Front
FIGURE 4
N
M
L
K
4 Remove the (2) “L” screws holding the valve bracket to the chassis.
5 Pull the solution valve down and disconnect solution cable “M” from the valve arm (do not loose the
bushing).
12
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Chassis
Mounts
M
K
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SOLUTION SYSTEM
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SOLUTION CABLE REPLACEMENT - 32, 38, 320, 380 (continued...)
6 Remove the solution cable from the chassis mount (take note of its location in the mount).
7 Tip the solution and recovery tanks to the sides of the machine.
8 Remove the access panel from the front side of the control panel.
9 Disconnect 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
1 Kinked solution hoses.
2 Solution valve cable needs adjustment.
3 Plugged screen in the solution tank (32, 38, 320, 380).
4 Plugged solution filter (260 / see figure 1).
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Problem: Solution Leaks With The Valve In The Off Position
1 Solution valve cable needs adjustment.
2 Solution valve defective.
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Problem: More Solution Flow To One Brush Than The Other
1 Kinked solution hoses.
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BRUSH DRIVE SYSTEM
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MAINTENANCE
Once a month . . .
1 Lubricate the (2) pressure arm bearings.
Every 6 months . . .
1 Check 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.
2 Grease the guide bushings for the brush pressure control lever.
Once a year . . .
1 Check 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.
2 Remove 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
1 Open the front access door.
2 See Figure 1. Loosen the (2) “A” bolts.
3 Turn 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.
4 There should be about 3/32 inch (2 mm) of belt deflection when 3-1/4 pounds of pressure is applied
between the pulleys.
5 Tighten the (2) “A” bolts and test for proper operation.
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE BELT ADJUSTMENT - 260 (continued...)
FIGURE 1
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE BELT ADJUSTMENT - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip
them to the sides of the machine.
2 Open the front access door.
3 See Figure 2. Loosen the (2) “C” bolts.
4 Remove the belt guard.
5 Turn 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.
6 There should be about 3/32 inch (2 mm) of
belt deflection when 3-1/4 pounds of pressure
is applied between the pulleys.
7 Reassemble in reverse order and test for
proper operation.
FIGURE 2
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR - CARBON BRUSH INSPECTION - 260
1 Drain and remove the solution and recovery tanks and disconnect the batteries.
2 See Figure 3. Remove access panel “E” from under the solution tank.
FIGURE 3
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR - CARBON BRUSH INSPECTION - 260 (continued...)
3 See Figure 4. Remove the “F” brush covers from the brush drive motor.
4 Remove one of the brushes from its holder.
5 Measure the length of the brush. If it is worn to a length of 3/8 inch (10 mm) or less, remove the brush
motor (see the BRUSH DRIVE MOTOR REPLACEMENT section of this chapter) and replace all of the
brushes. If it is longer than 3/8 inch (10 mm), put it back in its holder and reassemble in reverse order.
6 Test the brush drive system for proper operation.
FIGURE 4
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR - CARBON BRUSH INSPECTION - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip them to the sides of the machine.
2 Disconnect the batteries.
3 See Figure 5. Remove belt guard “G”.
4 Remove large equalizer spring “H”.
5 Remove bracket “I”.
6 Remove the “J” brush covers from the brush drive
motor.
7 Remove one of the brushes from its holder.
8 Measure the length of the brush. If it is worn to a
length of 3/8 inch (10 mm) or less, remove the
brush motor (see the BRUSH DRIVE MOTOR
REPLACEMENT section of this chapter) and
replace all of the brushes. If it is longer than 3/8
inch (10 mm), put it back in its holder and reassemble in reverse order.
FIGURE 5
9 Test the brush drive system for proper operation.
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR REPLACEMENT - 260
1 Drain and remove the solution and recovery tanks and disconnect the batteries.
2 See Figure 3. Remove access panel “E” from under the solution tank.
FIGURE 3
3 Disconnect the brush drive motor wires (take note of their location for reassembly).
4 See Figure 6. Remove large equalizer spring “K”.
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR REPLACEMENT - 260 (continued...)
FIGURE 6
5 Remove the (2) “L” bolts.
6 Turn the (2) large “M” bolts to loosen the belt tension and remove the belt.
7 Remove the (4) “N” bolts and nuts and remove the brush drive motor.
8 Reassemble in reverse order and test for proper operation.
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR REPLACEMENT - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip them to the sides of the machine.
2 Disconnect the batteries and open the front access door.
3 See Figure 7. Remove panel “O”.
4 Disconnect the brush drive motor wires (take note of their location for reassembly).
FIGURE 7
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BRUSH DRIVE SYSTEM
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BRUSH DRIVE MOTOR REPLACEMENT - 32, 38, 320, 380 (continued...)
5 See Figure 8. Remove the (2) “P” bolts and
remove the belt guard.
6 Remove large equalizer spring “Q”.
7 Remove bracket “R”.
8 Turn the (2) large “S” bolts to loosen the belt
tension and remove the belt.
9 Remove bolt “T” and remove the brush drive
motor from the machine.
10 Remove the (4) “U” bolts and nuts and remove
the motor from the bracket.
11 Reassemble in reverse order and test for
proper operation.
FIGURE 8
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BRUSH DRIVE SYSTEM
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PRESSURE ARM BEARING REPLACEMENT - 260
1 Drain the solution and recovery tanks.
2 Remove all of the battery cables and remove the batteries from the machine.
3 Remove the skirts and brushes and tip the machine up onto its front end (to prevent injury or damage,
use two people when tipping the machine up).
4 See Figure 9. Remove bolt “V” and its bushings and nut (take note of how these bushings are as-
sembled for reassembly).
5 Remove the (2) “W” bolts, springs and washers.
6 Disconnect the solution hoses from the “X” tubes.
7 Remove the “Y” bolts and lift the pressure arm assemblies out of the machine.
8 Remove the “Z” nuts.
9 Use blocks of wood to support the brush holder “OO” and drive the pressure arm shaft “PP” out of the
brush holder and pressure arm “QQ”.
Note: Hold a brass drift against the pressure arm shaft and hammer on the drift. Hammering directly
on the pressure arm shaft will damage the shaft, making it difficult to get apart. Do not use a
gear puller on the brush holders, they are cast aluminum and will break.
10 Remove the “AA” retaining rings and drive the bearings and spacer out of the pressure arm.
11 Install the new bearings and reassemble in reverse order.
Note: When installing the new bearings, make sure that the open side of each bearing is facing the
grease fitting, and the sealed side of the bearings are facing to the outside. Grease the bearings
after assembly
12 Test for proper operation.
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BRUSH DRIVE SYSTEM
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PRESSURE ARM BEARING REPLACEMENT - 260 (continued...)
FIGURE 9
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BRUSH DRIVE SYSTEM
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PRESSURE ARM BEARING REPLACEMENT - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip them to the sides of the machine.
2 Remove all of the battery cables and remove the batteries from the machine.
3 Tip the tanks back into position and tip the machine over onto its side (to prevent injury or damage, use
two people when tipping the machine over).
4 Remove the scrub brushes.
5 See Figure 10. Remove the (2) “BB” bolts, bushings and nuts.
6 Remove the (2) “CC” bolts, springs and washers.
7 Disconnect the solution hoses from the “DD” tubes.
8 Remove the “EE” bolts and lift the pressure arm assemblies out of the machine.
9 Remove the “FF” nuts.
10 Use blocks of wood to support the brush holder “RR” and drive the pressure arm shaft “SS” out of the
brush holder and pressure arm “TT”.
Note: Hold a brass drift against the pressure arm shaft and hammer on the drift. Hammering directly
on the pressure arm shaft will damage the shaft, making it difficult to get apart. Do not use a
gear puller on the brush holders, they are cast aluminum and will break.
11 Remove the “GG” retaining rings and drive the bearings and spacer out of the pressure arm.
12 Install the new bearings and reassemble in reverse order.
Note: When installing the new bearings, make sure that the open side of each bearing is facing the
grease fitting, and the sealed side of the bearings are facing to the outside. Grease the bearings
after assembly.
13 Test for proper operation.
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BRUSH DRIVE SYSTEM
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PRESSURE ARM BEARING REPLACEMENT - 32, 38, 320, 380 (continued...)
FIGURE 10
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BRUSH DRIVE SYSTEM
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PROPELLING LINKAGE ADJUSTMENT - 260
1 Put the brushes or pad holders on the machine. Make sure that they are the proper size and type for the
machine. If pad holders are being used, install proper size pads before installing the pad holders on the
machine.
2 Push the control handle lock down to hold the handle in the neutral position and lower the brush drive to
the floor.
3 See Figure 11. Loosen lock nut “HH”.
FIGURE 11
4 Turn the main power switch ON and start the brush drive motor. The machine should not move forward
or reverse with the handle locked in the neutral position.
5 If it does, turn propelling adjustment shaft “II” to stop the machines movement. Turning the shaft clock-
wise increases forward travel, counterclockwise increases reverse travel.
6 After the adjustment is complete, tighten lock nut “HH”, release the control handle lock and test the
machine. See the TROUBLESHOOTING section of this chapter if the machine does not propel properly.
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BRUSH DRIVE SYSTEM
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PROPELLING LINKAGE ADJUSTMENT - 32, 38, 320, 380
1 Put the brushes or pad holders on the machine. Make sure that they are the proper size and type for the
machine. If pad holders are being used, install proper size pads before installing the pad holders on the
machine.
2 See Figure 12. Disconnect spring “JJ”, take note of its location for reassembly (this step is for drive
models only).
3 Lower the brush drive, disengage the control handle “neutral” lock and unpin the (2) handles.
FIGURE 12
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BRUSH DRIVE SYSTEM
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PROPELLING LINKAGE ADJUSTMENT - 32, 38, 320, 380 (continued...)
4 See Figure 13. Loosen the (2) “KK” lock nuts.
FIGURE 13
5 Turn the left adjustment shaft “LL” until the control handle lock “MM” will drop easily into the notch “NN”
without moving the left handle.
6 After the left handle is adjusted and locked in neutral, adjust the right shaft until the (2) handles line up
and can be pinned together easily.
7 After the adjustment is complete, tighten the (2) “KK” lock nuts.
8 Test run the machine to make sure it does not move in any direction when locked in neutral. When
testing, move the machine around to different locations to make sure an uneven floor surface is not
causing it to move.
9 See the TROUBLESHOOTING section of this chapter if the machine does not propel properly.
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BRUSH DRIVE SYSTEM
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TROUBLESHOOTING
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Brush Motor Will Not Run
1 Tripped brush motor circuit breaker.
2 Defective brush motor solenoid.
3 Defective brush motor switch (on top of control handle/260 only).
4 Defective brush motor.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Squealing Noise When Brushes Are Lowered
1 Brush drive belt needs adjustment.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Poor Propelling
Poor propelling is often caused by improper or worn pad holders or brushes. Always check these items before
looking for a mechanical problem. If the brushes or pad holders are in good condition, check for the conditions
listed below.
1 Worn bearings in caster wheel.
2 Worn bearings in main wheels.
3 Worn control handle pivot bushings.
4 Worn pressure arm bearings.
5 Improperly adjusted brush propelling linkage.
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VACUUM SYSTEM
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MAINTENANCE
Whenever the vacuum system does not perform properly, the entire system should be cleaned and inspected
following the check list below.
1 Clean built up dirt from the inside of the squeegee tool.
2 Replace the squeegee blades if they are nicked or torn.
3 If the edge of the squeegee blade is worn to a radius, turn it around or over so a new edge faces forward.
4 Inspect the squeegee hose, rinse any built up dirt from the hose. Replace the hose if it is kinked or
damaged.
5 Clean the float ball cage.
6 Check the recovery tank cover gasket to make sure it seals.
7 Check the drain hose plug, replace it if it does not seal.
8 Make sure that the large inlet tube inside the recovery tank is not plugged (32, 38, 320, 380 only).
9 Remove the vacuum motors and check the inlet filters. Clean or replace them as required (Do Not
Operate The Machine Without The Filters In Place / 32, 38, 320, 380 only).
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VACUUM SYSTEM
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VACUUM MOTOR - CARBON BRUSH INSPECTION - 260
1 Drain the solution and recovery tanks and remove them from the machine.
2 Disconnect the batteries.
3 See Figure 1. Remove access panel “A”.
FIGURE 1
A
Front
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VACUUM SYSTEM
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VACUUM MOTOR - CARBON BRUSH INSPECTION - 260 (continued...)
4 See Figure 2. Remove cover “B” from the vacuum motor.
5 Remove the black plastic cover from the end of the vacuum motor.
6 Remove one of the brush holders and remove the carbon brush from the motor.
7 Measure the length of the brush. Replace both brushes if it is 3/8 inch (10 mm) or shorter.
8 Reassemble in reverse order and test for proper operation.
FIGURE 2
Front
B
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VACUUM SYSTEM
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VACUUM MOTOR - CARBON BRUSH INSPECTION - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip them to the sides of the machine.
2 Disconnect the batteries and open the front access door.
3 Remove the large equalizer spring (take note of which hole it is hooked in before removing).
4 See Figure 3. Remove access panel “C”.
D
C
FIGURE 3
5 Remove plastic cover “D” from the end of one of the vacuum motors.
6 Remove one of the brush holders and remove the carbon brush from the motor.
7 Measure the length of the brush. Replace all of the brushes in both of the motors if it is 3/8 inch (10 mm)
or shorter.
8 Reassemble in reverse order and test for proper operation.
Front
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VACUUM SYSTEM
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VACUUM MOTOR REMOVAL - 260
1 Drain the solution and recovery tanks and remove them from the machine.
2 Disconnect the batteries.
3 See Figure 4. Remove access panel “E”.
4 Unplug the vacuum motor from the wiring harness.
FIGURE 4
E
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36
Front
Page 40
VACUUM SYSTEM
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VACUUM MOTOR REMOVAL - 260 (continued...)
5 See Figure 5. Remove the (3) “F” screws and remove the vacuum motor from the machine.
6 Reassemble in reverse order and test for proper operation.
FIGURE 5
Front
F
F
F
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VACUUM SYSTEM
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
VACUUM MOTOR REMOVAL - 32, 38, 320, 380
1 Drain the solution and recovery tanks and tip them to the sides of the machine.
2 Disconnect the batteries and open the front access door.
3 Remove the large equalizer spring (take note of which hole it is hooked in before removing).
4 See Figure 6. Remove access panel “G”.
FIGURE 6
G
Front
H
5 Disconnect the vacuum motor(s) that you are removing from the wiring harness.
6 Remove the (3) “H” screws and spacers and remove the vacuum motor from the machine.
7 Reassemble in reverse order and test for proper operation.
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VACUUM SYSTEM
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SQUEEGEE ADJUSTMENT - STRAIGHT
1 Remove the squeegee tool and clean it thoroughly.
2 Replace the squeegee blades if they are cut, nicked or wavy.
3 Put the squeegee back on the machine and put the squeegee lever in the down position.
4 See Figure 7. Turn the “I” screws to set the squeegee angle so that the front and rear blades touch the
floor equally. Alternate between the screws, making small adjustments (one turn or less) at each one.
FIGURE 7
Front
I
5 If the front blade is off the floor, loosen the top screws and tighten the bottom screws. If the rear blade is
off the floor, loosen the bottom screws and tighten the top screws. All (4) “I” screws should be tight when
the adjustment is complete.
6 Test for proper operation.
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VACUUM SYSTEM
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SQUEEGEE ADJUSTMENT - CURVED
1 Remove the squeegee tool and clean it thoroughly.
2 Replace the squeegee blades if they are cut, nicked or wavy. If the front edge of the wiping blade is worn
to a radius, turn it around or over so that a new edge is facing forward.
3 Put the squeegee back on the machine and put the squeegee lever in the down position.
4 See Figure 8. Turn the “J” screws to set the squeegee angle so that the entire length of the wiping blade
sits flat on the floor. Alternate between the screws, making small adjustments (one turn or less) at each
one.
FIGURE 8
Front
J
5 If the squeegee is high in the middle, loosen the lower screws and tighten the upper screws. If the
squeegee is high on the ends, loosen the upper screws and tighten the lower screws. All (4) “J” screws
should be tight when the adjustment is complete.
6 Test for proper operation.
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Page 44
VACUUM SYSTEM
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
SQUEEGEE BLADE REPLACEMENT - STRAIGHT
1 To disassemble the squeegee cartridge, remove the (2) small “K” screws and (2) large “L” screws (see
Figure 9).
FIGURE 9
L
K
O
K
L
M
N
Wood Support Blocks
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VACUUM SYSTEM
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SQUEEGEE BLADE REPLACEMENT - STRAIGHT (continued...)
2 Grip one of the “M” blades at the end of channel
“N” and slowly peel it out of the channel (see
Figure 10). Loosen and remove retainer “O” and
remove the other blade “M”.
3 Discard the worn squeegee blades and thor-
oughly clean the channel and retainer.
4 Completely submerge the new squeegee blades
in a bucket of soapy water.
NOTE: Failure to lubricate the blades will
prevent easy installation of retainer “O”
5 See Figure 9 for reassembly. Set the (2) “M”
blades flat against the inside of channel “N”.
Make sure the blade ends overhang equally at
both ends of the channel “N.”
6 Install the (2) large “L” screws loosely in the (2)
center holes of retainer “O” and channel “N”.
Press down firmly with even pressure to seat the
retainer.
FIGURE 10
7 Thoroughly tighten the (2) large “L” screws to
draw all parts securely together.
8 Remove one “L” screw and install a small “K”
screw in its place, then repeat this step with the
other “L” screw.
9 Install the (2) “L” screws in their original locations and fully tighten.
10 Install the rebuilt cartridge on the squeegee tool and mount the tool back on the machine.
11 If you are assembling one of the optional BROWN squeegee cartridge assemblies, refer to the chart
below to cut the squeegee blades to the proper length, then follow the steps above to assemble.
“N” Channel “M” Blade Machine
Length Length Usage
24" ..........................25-1/8" ....................CV-21B
29-7/8" ....................31" ..........................CV-26B
36-13/16" ................37-15/16" ................CV-32B, BD
40-13/16" ................41-15/16" ................CV-38BD
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VACUUM SYSTEM
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SQUEEGEE BLADE REPLACEMENT - CURVED
1 Remove the squeegee tool assembly and disassemble it.
2 Discard the worn blade(s) and thoroughly wash the remaining parts.
3 Install the new blade(s) and reassemble as shown in Figure 11.
FIGURE 11
32, 38, 320, 380
260
Backup Blade
Wiping Blade
Backup Blade
Wiping Blade
4 Make sure that the screws (or nuts) are not so tight that the blades are wavy or bent out of shape.
5 Reinstall the squeegee on the machine and test for proper operation.
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VACUUM SYSTEM
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
TROUBLESHOOTING
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Machine Will Not Pick Up Water, Water Flows Around Ends Of The
Squeegee
1 Drain hose plug not sealing.
2 Recovery tank cover not sealing.
3 Batteries need charging.
4 Defective vacuum motor.
5 Air leaks in vacuum or squeegee hose.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Water In Vacuum Motor
1 Operator using a high sudsing detergent.
2 Drain hose plug not sealing.
3 Vacuum shut-off float not closing.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Float Closes Before Tank Is Full
1 Operator using a high sudsing detergent.
2 Vacuum shut-off float cage clogged.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: Vacuum Motor Will Not Run When The Squeegee Is Lowered
1 Tripped vacuum motor circuit breaker.
2 Defective vacuum motor switch.
3 Defective vacuum motor solenoid.
4 Defective vacuum motor.
56043021 - 260, 32, 38, 320, 380
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Page 48
DRIVE SYSTEM
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MAINTENANCE
260, 32B . . .
1 Lubricate the (2) main wheel bearings and the caster swivel and wheel bearings once per month.
32BD, 38BD, 320BHD, 380BHD . . .
1 Lubricate the (4) differential bearings, the (2) intermediate shaft bearings and the caster swivel and wheel
bearings once per month.
2 Lubricate the drive chain every 3 months.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
DRIVE BELT REMOVAL - 32BD, 38BD, 320BHD, 380BHD
1 Disconnect the (3) hoses from the bottom of the recovery tank and remove the tank from the machine.
2 See Figure 1. Remove the (5) screws holding cover “A” in place and work the cover out of the machine.
3 Loosen the hose clamp on hose “B” and pull it off of the vacuum motor inlet tube.
FIGURE 1
A
Front
B
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DRIVE SYSTEM
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DRIVE BELT REMOVAL - 32BD, 38BD, 320BHD, 380BHD (continued...)
4 See Figure 2. Loosen the (2) “C” screws.
FIGURE 2
Front
K
C
I
E
D
H
G
F
J
5 Remove the brushes, lower the brush drive assembly, open the left splash guard and front access door.
6 Remove bolt “D” and lower the idler pulley assembly to the floor. Be careful not to loose the bushing and
washers around bolt “D”
7 Remove bracket “E” from the top of the gear box.
8 Remove bolt “F”, pull belt guard “G” toward the rear and work belt “H” off of lower pulley “I”.
9 Work the belt off of idler pulley “J”, off of upper pulley “K”, and out of the machine.
10 Follow steps in reverse order to reassemble. Adjust belt guards so they are positioned about 1/8 inch (3
mm) from the belt.
11 Test the machine for proper operation.
46
56043021 - 260, 32, 38, 320, 380
Page 50
DRIVE SYSTEM
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DRIVE WHEEL REMOVAL - 32BD, 38BD, 320BHD, 380BHD
1 Remove the differential from the machine (see steps 1-5 of the DIFFERENTIAL REMOVAL section of this
chapter).
2 Remove the set screws holding the wheels on the axle. Support the wheels and use a hammer and a
brass drift to drive the axle out of the wheels.
3 Reassemble in reverse order and test for proper operation.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
MAIN WHEEL REMOVAL - 260
1 Drain and remove the solution and recovery tanks.
2 Remove all of the battery cables and remove the batteries from the machine.
3 Tip the machine up onto its front end.
4 Clean any dirt or rust from the axle shaft, using a wire brush, file, or sand paper.
5 See Figure 3. Loosen the set screws in the (4) “L” collars (heating the collars with a torch will make it
easier to loosen the set screws if they are rusted).
FIGURE 3
L
M
M
L
N
O
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DRIVE SYSTEM
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MAIN WHEEL REMOVAL - 260 (continued...)
6 Remove the (4) “M” set screws in the frame members (heating the frame members with a torch will make
it easier to remove the set screws if they are rusted).
Note: The axle cannot be removed if the (4) “M” set screws are just loosened!
7 Using a brass drift and a hammer, drive the axle “N” to the left or right to remove the defective wheel. If
the axle moves a little and then binds, tap the gear case arm “O” in the opposite direction that the axle is
moving. Do this each time the axle binds.
Note: Do not hammer directly on the axle shaft!
8 Reassemble in reverse order. Pump grease into the fitting on the new wheel until grease comes out
around the bearing.
9 Test for proper operation.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
MAIN WHEEL REMOVAL - 32B
1 Drain the solution and recovery tanks, remove all of the battery cables, remove the batteries, and tip the
machine on its left side.
2 Remove the (4) bolts holding the axle shaft in place and remove the axle from the machine.
3 Slide the wheels off of the axle.
4 Reassemble in reverse order and test for proper operation.
56043021 - 260, 32, 38, 320, 380
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DRIVE SYSTEM
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DIFFERENTIAL REMOVAL - 32BD, 38BD, 320BHD, 380BHD
1 Drain the solution and recovery tanks, remove all of the battery cables, remove the batteries, and tip the
machine on its left side.
2 Remove the master link from the drive chain and remove the chain from the machine.
3 See Figure 4. Remove the “P” bolts holding squeegee centering assembly “Q” in place and remove the
centering assembly from the machine.
FIGURE 4
R
S
W
T
Y
X
W
P
U
BB
V
X
Q
Front
P
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DRIVE SYSTEM
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DIFFERENTIAL REMOVAL - 32BD, 38BD, 320BHD, 380BHD (continued...)
4 Remove retaining ring “R”, pin “S” and the (2) “T” bushings from the brake linkage. Pull the end of brake
band “U” away from brake drum “V”.
Note: As you complete the next step, look for the “W” shims between some of the “X” pillow blocks and the
“Y” frame members. These shims compensate for slight variations in the height of the frame members. Be sure to install the shims on the same frame member when reinstalling the differential. If the
shims are not installed in the proper location, the wheels will be difficult to turn when the “P” bolts are
tightened.
5 Remove the remaining “P” bolts and remove the differential assembly from the machine.
If Replacing the Differential...
6 Clean all dirt from the axle shafts, using emery cloth, a file or a wire brush and loosen the “Z” set screws
(see Figure 5).
FIGURE 5 FIGURE 6
AA
Z
7 Collar “AA” must be turned to release the pillow block bearing from the axle. Use a drift punch and
hammer to break the collar loose, as shown in Figure 6. If the collar does not release, try moving it in the
opposite direction.
8 Slide the pillow blocks off of the differential axle.
9 See Figure 4. Remove the (4) bolts holding brake drum “V” and sprocket “BB” in place and slide them off
of the differential.
Note: Repair parts for the differential itself are not available from Advance. Replace the entire differential if
the axles or gears are damaged.
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DRIVE SYSTEM
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DIFFERENTIAL REMOVAL - 32BD, 38BD, 320BHD, 380BHD (continued...)
Installing the Differential
10 Clean all grease and oil from the axle shafts, pillow block bearings and locking collars.
11 Install the sprocket, brake drum, pillow blocks, and wheels on the new differential.
12 Install the differential assembly on the frame. If there were shims between any of the pillow blocks and
frame members, be sure to install them on the same frame member that they were on originally.
13 Center the differential within the frame and tighten the locking collars and set screws on each pillow
block.
14 Turn the wheels to check for binding. If the wheels are difficult to turn, the differential is not properly
aligned or one of the axles are bent. Install shims between the pillow blocks and the frame members as
required to make the wheels turn freely.
15 Install the brake band, chain, batteries, and cables.
16 Test the machine for proper operation.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
CASTER REPLACEMENT
The caster wheel is located on the back of the 260, and on the front of the 32, 38, 320, 380. The bearings in
the swivel portion of the caster seldom fail. The bearings in the caster wheel are usually damaged by debris
wrapping around the axle and damaging the seals, or from lack of lubrication.
To replace the caster wheel:
1 Drain the solution and recovery tanks.
2 Use a jack to lift the caster-end of the machine off of the floor slightly.
3 Remove the axle nut and bolt and remove the caster wheel.
4 Install the new caster wheel and pump grease into the bearings with a grease gun (if applicable).
5 Test run the machine to make sure that the caster turns freely.
56043021 - 260, 32, 38, 320, 380
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DRIVE SYSTEM
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
TROUBLESHOOTING - 32BD, 38BD, 320BHD, 380BHD
Before troubleshooting the transport drive system make sure the brake is OFF.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Problem: No Wheel Drive, But Brush Motor Runs
1 Transport drive cable needs adjustment.
2 Transport drive cable broken.
3 Transport drive belt broken.
4 Transport drive chain broken.
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Page 56
BATTERIES
________________________________________________________________________________________________________________________________________________________________________________
WARNING!
Use extreme caution when working with batteries. Sulfuric acid in batteries can cause severe injury if allowed
to contact skin or eyes.
Explosive hydrogen gas is vented from inside the battery caps. This gas can be ignited by any electrical arc,
spark, or flame.
When working with batteries:
• Remove all jewelry
• Wear safety glasses
• Do not smoke
• Do not allow tools to touch more than one battery terminal at a time
• Work in a well ventilated area
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
BATTERY MAINTENANCE
Proper maintenance of electric vehicle batteries can greatly extend their life.
There are 3 simple rules for good battery maintenance:
• Maintain Proper Electrolyte Level - Use distilled water in batteries whenever possible. If batteries are
discharged, add just enough water to cover the plates in each cell. If batteries are fully charged, fill each
cell to the bottom of the filler tube. Do not over-fill the batteries! Do not add acid to batteries!
• Keep the Batteries Charged - Batteries should be charged each time that a machine is used for more
than 1 hour. Machine operators should tip or remove the tanks for charging, to avoid a concentrated
build-up of hydrogen gas. Operators should follow the instructions provided with their specific battery
charger, to determine how long the batteries should be charged. Even when a machine is stored, the
batteries should be charged once a month to prevent the batteries from “sulfating”. Almost all battery
caps are vented, so there’s no need to loosen or remove them for charging.
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BATTERIES
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
BATTERY MAINTENANCE (continued...)
• Keep the Batteries Clean - Use a damp cloth to wipe dirt from the top of the batteries. Battery terminals
must be clean and tight. If the top of the batteries are wet after charging, the batteries have probably
been over-filled.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
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 cell(s)” in the battery system- that is, one (or more)
cell that is putting out less voltage than the other cells.
Note: Always charge batteries before testing.
There are 2 ways to find a dead cell:
• Use a hydrometer to check the specific gravity (or “state of charge”) of the fluid in each cell. A dead cell
is one that reads 50 points (or more) lower than the other cells.
• Use a volt meter to check the voltage of each battery with the brush and vac motors running. The battery
with the dead cell will read 1 or 2 volts lower than the other batteries in the system.
If the batteries in the machine are more than 1 year old, it’s usually best to replace the whole set, rather than
replacing just one battery.
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Nilfisk-Advance, Inc.
14600 21st Avenue North
Plymouth, MN, 55447-3408
www.nilfisk-advance.com
Phone: 800-989-2235
Fax: 800-989-6566
©2001 Nilfisk-Advance, Inc.,
Plymouth, MN 55447-3408
Printed in the U.S.A.
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