Nilfisk-Advance Hydro-Retriever 320BHD 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

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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

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

_______________________________________________________________________________________

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

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