Nilfisk-Advance Convertamatic 28 User manual

Brand: Nilfisk-Advance

Model: Convertamatic 28

Category: Scrubber

Type: User manual

This manual is also suitable for

Convertamatic 32

9/95 revised 3/01 Form Number 56043025

SERVICE MANUAL

Advance MODELS 56392290, 56392210,

56392220, 56392230, 56392240, 56392270

Nilfisk MODELS 56391372, 56392823,

56392824

Convertamatic™ 28/32/38LX

Hydro-Retriever™ 280/320/380HD

BA 700/800/1000

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 3

TABLE OF CONTENTS

SAFETY ...............................................................................................................................................................................4

SPECIFICATIONS & MAINTENANCE ............................................................................................................................. 5-8

KNOW YOUR MACHINE ............................................................................................................................................... 9-10

SOLUTION SYSTEM ................................................................................................................................................... 11-18

MAINTENANCE ...............................................................................................................................................................11

FLOW CONTROL VALVE REPLACEMENT - BA 700 / 28LX / 280HD ..................................................................... 11-12

FLOW CONTROL VALVE REPLACEMENT - BA 800, 1000 / 32, 38LX / 320, 380HD ...................................................12

SOLUTION CABLE REPLACEMENT - BA 700 / 28LX / 280HD ......................................................................................13

SOLUTION CABLE REPLACEMENT - BA 800, 1000 / 32, 38LX / 320, 380HD ..............................................................14

SOLUTION SOLENOID VALVE REMOVAL - BA 700 / 28LX / 280HD ............................................................................15

SOLUTION SOLENOID VALVE REMOVAL - BA 800, 1000 / 32, 38LX / 320, 380HD ....................................................16

SOLUTION SOLENOID VALVE DISASSEMBLY AND CLEANING.................................................................................17

TROUBLESHOOTING .....................................................................................................................................................18

BRUSH DRIVE SYSTEM ............................................................................................................................................. 19-25

BRUSH DRIVE SYSTEM MAINTENANCE ......................................................................................................................19

BELT TENSION ADJUSTMENT - BA 700 / 28LX / 280HD ........................................................................................ 19-20

BELT TENSION ADJUSTMENT - BA 800, 1000 / 32, 38LX / 320, 380HD ......................................................................20

BRUSH LIFT LIMIT SWITCHES ................................................................................................................................ 21-23

LIMIT SWITCH ADJUSTMENT ................................................................................................................................ 21-22

LIMIT SWITCH REPLACEMENT ...................................................................................................................................23

BRUSH LIFT ACTUATOR REPLACEMENT ....................................................................................................................24

TROUBLESHOOTING .....................................................................................................................................................25

VACUUM SYSTEM ...................................................................................................................................................... 26-32

VACUUM SYSTEM MAINTENANCE ......................................................................................................................... 26-27

VACUUM MOTOR REMOVAL - BA 700 / 28LX / 280HD ................................................................................................27

VACUUM MOTOR REMOVAL - BA 800, 1000 / 32, 38LX / 320, 380HD ........................................................................28

SQUEEGEE MAINTENANCE ..........................................................................................................................................29

SQUEEGEE ADJUSTMENT (BEFORE SN 1081111) .....................................................................................................29

SQUEEGEE ADJUSTMENT (AFTER SN 1081110) ........................................................................................................30

TROUBLESHOOTING ............................................................................................................................................... 31-32

WHEEL DRIVE SYSTEM ............................................................................................................................................. 33-37

WHEEL DRIVE SYSTEM MAINTENANCE ......................................................................................................................33

CHAIN REMOVAL AND ADJUSTMENT .................................................................................................................... 33-34

DRIVE MOTOR REPLACEMENT ....................................................................................................................................34

DRIVE WHEEL REPLACEMENT .....................................................................................................................................35

TROUBLESHOOTING .....................................................................................................................................................36

POTENTIOMETER ADJUSTMENT .................................................................................................................................37

BATTERY SYSTEM ..................................................................................................................................................... 38-39

BATTERY MAINTENANCE ..............................................................................................................................................38

BATTERY TESTING ........................................................................................................................................................39

ELECTRICAL SYSTEM................................................................................................................................................ 41-46

ELECTRICAL COMPONENT LOCATION........................................................................................................................41

WIRING DIAGRAMS / SCHEMATICS ....................................................................................................................... 42-46

Note: All references to right, left, front, or rear in this manual are as seen from the operator’s stand-point.

4 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SAFETY

CAUTIONS AND WARNINGS

SYMBOLS

Nilfisk-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.

GENERAL SAFETY INSTRUCTIONS

Specific Cautions and Warnings are included to warn you of potential danger of machine damage or bodily harm.

WARNING!

•This machine shall be used only by properly trained and authorized persons.

•Keep sparks, flame and smoking materials away from batteries. Explosive gases are vented during normal operation.

•Charging the batteries produces highly explosive hydrogen gas. Charge batteries only in well-ventilated areas, away from open

flame. Do not smoke while charging the batteries.

•Remove all jewelry when working near electrical components.

•Turn the key switch off (O) and disconnect the batteries before servicing electrical components.

•Never work under a machine without safety blocks or stands 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.

•Do not clean this machine with a pressure washer.

•Do not operate this machine on ramps or inclines of more than an 8.7 percent gradient.

CAUTION!

•This machine is not approved for use on public paths or roads.

•This machine is not suitable for picking up hazardous dust.

•Do not use scarifier discs and grinding stones. Nilfisk-Advance will not be held responsible for any damage to floor surfaces

caused by scarifiers or grinding stones (can also cause damage to the brush drive system).

•When operating this machine, ensure that third parties, particularly children, are not endangered.

•Before performing any service function, carefully read all instructions pertaining to that function.

•Do not leave the machine unattended without first turning the key switch off (O), removing the key and applying the parking

brake.

•Turn the key switch off (O) before changing the brushes, and before opening any access panels.

•Take precautions to prevent hair, jewelry, or loose clothing from becoming caught in moving parts.

•Use caution when moving this machine in below freezing temperature conditions. Any water in the solution or recovery tanks

or in the hose lines could freeze, causing damage to valves and fittings. Flush with windshield washer fluid.

SAVE THESE INSTRUCTIONS

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 5

_________________________________________________________________________________________________________________

SPECIFICATIONS - BA 700 / 28LX / 280HD

Dimensions English (Metric)

Scrub Brush Diameter 14.5 inches (36 cm)

Scrub Brush Path 28 inches (71 cm)

Scrub Brush Pressure 140 lbs. (63.5 kg)

Scrub Brush Speed 155 rpm (155 rpm)

Squeegee Size 33 inches (108 cm)

Machine Length 59 inches (150 cm)

Machine Width 30.25 inches (77 cm)

Machine Height 45.75 inches (116 cm)

Drive Wheel 10 inch (25 cm) solid, traction tire

Solution Tank Capacity 33 (US) gal (125 l)

Recovery Tank Capacity 31 (US) gal (118 l)

Coverage Rate 25,500 sq. ft (2,369 m2) per hour

Machine Weight 1520 lbs. (690 kg) Gross Vehicle Weight (GVW)

GVW – Standard machine without options, maximum size

batteries, full solution tank, empty recovery tank and brushes

770 lbs. (349 kg) shipping weight

General Specifications

Brush Motor 36 volt, 2 1/4 hp dc motor

Wheel Drive Motor 36 volt, 3/4 hp dc motor

Vacuum Motor 36 volt, 1 hp dc motor

Brush Drive Dual worm gear 10 to 1 reduction gear box

Squeegee Type 4 sided, curved, self tracking

Speed Control Electronic, fully variable forward/reverse

Batteries (6) 6 volt 244 AH (std)

SPECIFICATIONS

6 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SPECIFICATIONS

_________________________________________________________________________________________________________________

SPECIFICATIONS - BA 800 / 32LX / 320HD

Dimensions English (Metric)

Scrub Brush Diameter 17 inches (43 cm)

Scrub Brush Path 32 inches (81 cm)

Scrub Brush Pressure 160 lbs. (72.5 kg)

Scrub Brush Speed 120 rpm (120 rpm)

Squeegee Size 45 inches (114 cm)

Machine Length 62.5 inches (159 cm)

Machine Width 37 inches (94 cm)

Machine Height 46.75 inches (119 cm)

Drive Wheel 10 inch (25 cm) solid, traction tire

Solution Tank Capacity 33 gal (125 l)

Recovery Tank Capacity 31 gal (118 l)

Coverage Rate 32,500 sq. ft (3,019 m2) per hour

Machine Weight 1,718 lbs. (779 kg) Gross Vehicle Weight (GVW)

GVW – Standard machine without options, maximum size

batteries, full solution tank, empty recovery tank and brushes

825 lbs. (374 kg) shipping weight

General Specifications

Brush Motor 36 volt, 2 1/4 hp dc motor

Wheel Drive Motor 36 volt, 3/4 hp dc motor

Vacuum Motor 36 volt, 1 hp dc motor

Brush Drive Dual worm gear 10 to 1 reduction gear box

Squeegee Type 4 sided, curved, self tracking

Speed Control Electronic, fully variable forward/reverse

Batteries (6) 6 volt 350 AH (std)

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 7

______________________________________________________________________________________________

SPECIFICATIONS - BA 1000 / 38LX / 380HD

Dimensions English (Metric)

Scrub Brush Diameter 20 inches (50 cm)

Scrub Brush Path 38 inches (97 cm)

Scrub Brush Pressure 160 lbs. (72.5 kg)

Scrub Brush Speed 120 rpm (120 rpm)

Squeegee Size 45 inches (114 cm)

Machine Length 62.5 inches (159 cm)

Machine Width 40 inches (102 cm)

Machine Height 46.75 inches (119 cm)

Drive Wheel 10 inch (25 cm) solid, traction tire

Solution Tank Capacity 33 gal (125 l)

Recovery Tank Capacity 31 gal (118 l)

Coverage Rate 35,000 sq. ft (3,251 m2) per hour

Machine Weight 1,747 lbs. (792 kg) Gross Vehicle Weight (GVW)

GVW – Standard machine without options, maximum size

batteries, full solution tank, empty recovery tank and brushes

878 lbs. (398 kg) shipping weight

General Specifications

Brush Motor 36 volt, 2 1/4 hp dc motor

Wheel Drive Motor 36 volt, 3/4 hp dc motor

Vacuum Motor 36 volt, 1 hp dc motor

Brush Drive Dual worm gear 10 to 1 reduction gear box

Squeegee Type 4 sided, curved, self tracking

Speed Control Electronic, fully variable forward/reverse

Batteries (6) 6 volt 350 AH (std)

SPECIFICATIONS

8 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

______________________________________________________________________________________________

MAINTENANCE SCHEDULE

Maintenance intervals given are for average operating conditions. Machines used in severe operational environments may

require service more often.

Once a Once a Once a

MAINTENANCE ITEM Daily Week Month Year

Clean and inspect the tanks and hoses X

Clean the brushes and pads X

Clean the squeegee X

Charge the batteries X

Check battery water level X

Lubrication X

*Vacuum motor carbon brushes X

*Have your Nilfisk-Advance Dealer check the motors’ carbon brushes once a year or after 300 operating hours.

_________________________________________________________________________________________________________________

AFTER EACH USE

1Raise the brushes (or pads) and raise the squeegee. Move the machine to a service area.

2Turn the Master Key Switch (11) OFF and remove the key.

3To empty the solution tank, take the Solution Drain Hose off its hanger. Direct the hose to a designated “DISPOSAL SITE” and

remove the plug. Rinse the tank with clean water. Inspect the solution hoses; replace if kinked or damaged.

4To empty the recovery tank, take the Recovery Drain Hose (12) off its hanger. Direct the hose to a designated “DISPOSAL SITE”

and remove the plug. Rinse the tank with clean water. Inspect the recovery and vacuum hoses; replace if kinked or damaged.

5Remove the brushes or pad holders. Rinse the brushes or pads with warm water and hang them up to dry. Allow buffing pads

to dry completely before using again.

6Remove the Squeegee (13), rinse it with warm water and hang it up to dry.

7Check the “Maintenance Schedule” above and perform any required maintenance before storing the machine in a clean, dry

place.

______________________________________________________________________________________________________

LUBRICATING THE MACHINE

Once a month, pump grease into each grease fitting on the machine until grease seeps out around the bearings.

Grease fittings locations are:

•One on the front wheel

•One on each rear caster swivel

Apply light machine oil to lubricate the following:

•Solution tank hinge

•Recovery tank hinge

•Brush skirt locks

•Squeegee lever pivot linkage

•Solution lever pivot points

•Brake lever pivot points

•Drive Chain

•Pivot points for the squeegee and scrub brush lift linkage

MAINTENANCE

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 9

KNOW YOUR MACHINE

_________________________________________________________________________________________________________________

As you read this manual, you will occasionally run across a bold number in parentheses - example: (2). These numbers refer to an item on this or the following

page. Refer back to these pages whenever necessary to pinpoint the location of an item mentioned in the text.

1 Solution Lever

2 Twist Grip

3 Solution Tank Cover

4 Brake Lever

5 Power Connector

6 Circuit Breaker (80 Amp)

7 Circuit Breaker (25 Amp)

8 Circuit Breaker (25 Amp)

9 Circuit Breaker (5 Amp)

10 Squeegee Lever

11 Master Key Switch

12 Recovery Tank Drain Hose

13 Squeegee

14 Squeegee Blade Latch

15 Recovery Tank Cover

16 Skirt

10 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

KNOW YOUR MACHINE

CONTROL PANEL

17 Battery Meter

18 Brush Switch

19 Solution ON Light

20 Solution Switch, ON - Momentarily ON – OFF

21 Power ON Light

18 17

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 11

SOLUTION SYSTEM

_________________________________________________________________________________________________________________

MAINTENANCE

The solution system should be flushed every day to prevent a build-up of soap residue in the solution valve. To flush the

system...

1Park the machine near a designated “DISPOSAL SITE” and drain the solution tank.

2Put clean, warm water into the solution tank and let it drain through the drain hose.

3When the tank is empty, re-cap the drain hose and put about 2 inches (5 cm) of clean, warm water in the tank.

4Put the machine controls in the following positions:

•Key Switch (11) - ON

• Solution Switch (20) - ON

• Brush Drive (18) - Lowered

• Twist Grips (2) - Forward slightly

• Solution Flow Control Lever (1) - Pulled Back

5Let all of the clean water flow from the tank. This will flush dirt and soap residue from the electric solenoid valve and

the flow control valve.

______________________________________________________________________________________________

FLOW CONTROL VALVE REPLACEMENT - BA 700 / 28LX / 280HD

1Drain the solution tank at a designated

“DISPOSAL SITE”.

2See Figure 1. Remove the (A), (B), and (C)

Hoses from the solution valve fittings and

mark them to ensure proper reassembly.

3Remove Ball Joint (D) from the valve arm.

Be careful not to lose the bushings.

4Remove the valve mounting bolts and re-

move the valve from the machine.

5Remove the fittings from the old valve and

remove the valve from the mount, (note the

positioning of the fittings for reassembly).

6Install the new valve on the mount and

install the fittings.

FIGURE 1

12 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SOLUTION SYSTEM

FIGURE 2

7Follow steps 1 - 5 in reverse order to reassemble. Make sure that the valve mount is in the forward two holes as shown.

8Check for leaks and proper operation.

______________________________________________________________________________________________

FLOW CONTROL VALVE REPLACEMENT - BA 800, 1000 / 32, 38LX / 320, 380HD

1Drain the solution tank at a designated “DISPOSAL SITE”.

2Remove the left splash guard.

3See Figure 2. Remove the (E), (F), and (G) Hoses from the solution valve fittings and mark them to ensure proper

reassembly.

4Remove Ball Joint (H) from the valve

arm. Be careful not to lose the

bushings.

5Remove the valve mounting bolts

and remove the valve from the ma-

chine.

6Remove the fittings from the old

valve and remove the valve from

the mount, (note the positioning of

the fittings for reassembly).

7Install the new valve on the mount

and install the fittings.

8Follow steps 1 - 5 in reverse order to

reassemble.

9Check for leaks and proper opera-

tion.

_____________________________________________________________________________________________________________________________

FLOW CONTROL VALVE REPLACEMENT - BA 700 / 28LX / 280HD (continued)

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 13

SOLUTION SYSTEM

FIGURE 3

______________________________________________________________________________________________

SOLUTION CABLE REPLACEMENT - BA 700 / 28LX / 280HD

1Drain the solution tank at a designated

“DISPOSAL SITE”.

2See Figure 3. Disconnect Ball Joint (I)

from the valve arm. Be careful not to

lose the bushings.

3Remove Ball Joint (I) from the cable,

then remove the cable from the chassis

cable mount, (note the cable position in

the mount).

4See Figure 4. Remove Panel (J).

5Disconnect Ball Joint (K) from the lever,

and then remove the balljoint from the

cable.

6Remove the cable from the control

handle cable mount, (note the cable

position in the mount).

7Before removing the cable, take note of

the cable routing. Pull the cable up and

out through the control handle.

8Follow steps 1-8 in reverse order to

reassemble. Test the new cable for

proper operation before reinstalling the

panels.

FIGURE 4

14 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SOLUTION SYSTEM

______________________________________________________________________________________________

SOLUTION CABLE REPLACEMENT - BA 800, 1000 / 32, 38LX / 320, 380HD

1Drain the solution tank at a designated “DISPOSAL SITE”.

2Remove the left splash guard.

3See Figure 5. Disconnect Ball Joint (L) from the valve arm. Be careful not to lose the bushings.

4Remove the cable from the chassis cable mount (note the cable position in the mount), then remove Ball Joint (L)

from the cable.

5See Figure 4. Remove Panel (J).

6Disconnect Ball Joint (K) from the lever, and then remove the balljoint from the cable.

7Remove the cable from the control handle cable mount, (note the cable position in the mount).

8Before removing the cable, take note of the cable routing. Pull the cable down and out through the bottom of the

control handle, and then pull it out through the rear of the chassis.

9Follow steps 1-8 in reverse order to reassemble. Test the new cable for proper operation before reinstalling the handle

panel and splash guard.

FIGURE 5

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 15

SOLUTION SYSTEM

OFRONT

______________________________________________________________________________________________

SOLUTION SOLENOID VALVE REMOVAL - BA 700 / 28LX / 280HD

1Drain the solution and recovery

tanks at a designated “DISPOSAL

SITE” and disconnect one of the

battery cables.

2Tip the solution tank over to the

side of the machine.

3See Figure 6. Remove the (4) (M)

Screws and remove Cover (N) from

the machine.

4See Figure 7. Disconnect Hoses

(O), (P), (Q) and then disconnect

the solenoid valve wiring connec-

tor.

FIGURE 6

FIGURE 7

5Remove the (2) (R) Screws, remove the Solenoid Valve (S) and Bracket (T) from the machine.

6Remove the fittings from the solenoid valve only if you are replacing the solenoid valve (remove Fittings (U), (V), (W),

and (X) as a one piece unit to avoid snapping them off inside the Tee Fitting (X).

7Reassemble in reverse order and test for leaks and proper operation.

16 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SOLUTION SYSTEM

FRONT

EE HH

GG BB

IICC

______________________________________________________________________________________________

SOLUTION SOLENOID VALVE REMOVAL - BA 800, 1000 / 32, 38LX / 320, 380HD

1Drain the solution and recovery

tanks at a designated “DISPOSAL

SITE” and disconnect one of the

battery cables.

2Tip the solution tank over to the

side of the machine.

3See Figure 8. Remove the (4) (Y)

Screws and remove Cover (Z) from

the machine.

4See Figure 9. Disconnect Hoses

(AA), (BB), (CC) and then discon-

nect the solenoid valve wiring con-

nector.

5Remove the (2) (DD) Screws, remove the Solenoid Valve (EE) and Bracket (FF) from the machine.

6Remove the fittings from the solenoid valve only if you are replacing the solenoid valve (remove Fittings (GG), (HH),

(II), and (JJ) as a one piece unit to avoid snapping them off inside the Tee Fitting (JJ).

7Reassemble in reverse order and test for leaks and proper operation.

FIGURE 8

FIGURE 9

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 17

SOLUTION SYSTEM

______________________________________________________________________________________________

SOLUTION SOLENOID VALVE DISASSEMBLY AND CLEANING

1Remove the solenoid valve (do not remove the fittings from the solenoid valve unless you are replacing the valve!).

Refer to the Solution Solenoid Valve Removal sections of this chapter.

2See Figure 10. Remove the (2) (KK) Screws and Nuts and disassemble the valve (be careful not to lose any internal

parts).

FIGURE 10

3Thoroughly wash any dirt from Block (LL) and Diaphragm (MM).

4Reassemble in reverse order and test for leaks and proper operation.

18 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

SOLUTION SYSTEM

______________________________________________________________________________________________

TROUBLESHOOTING

______________________________________________________________________________________________

PROBLEM: NO SOLUTION FLOW

Possible Cause & Remedy:

1Machine controls not positioned properly - in order for solution to flow, the controls must be positioned as follows:

•Key Switch - ON

•Solution Switch - ON

•Brush Switch - ON

•Twist Grips - Forward

•Flow Control Lever - Pulled Back

2Clogged solution filter - drain solution tank, using the clear plastic drain hose at the back of the machine. This

automatically flushes loose dirt from the solution filter. If solution still does not flow, remove and disassemble the tee-

fitting (attached to the solenoid valve) and remove and clean the filter thoroughly.

3Clogged solenoid valve - remove, disassemble and clean the solenoid valve. See the Solenoid Valve Disassembly

and Cleaning section for instructions.

4Defective speed control - replace the speed control.

______________________________________________________________________________________________

PROBLEM: SOLUTION LEAKS IN THE “OFF” POSITION

Possible Cause & Remedy:

1Dirt in solenoid valve - remove, disassemble and clean the solenoid valve. See the Solenoid Valve Disassembly and

Cleaning section for instructions

2Defective solenoid valve - replace the solenoid valve. See the Solution Solenoid Valve Removal sections for

instructions.

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 19

BRUSH DRIVE SYSTEM

_____________________________________________________________________________

MAINTENANCE

Every 3 years...

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.

3Check 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.

_____________________________________________________________________________

BELT TENSION ADJUSTMENT - BA 700 / 28LX / 280HD

1Remove the actuator from the machine (see the Brush Lift Actuator Replacement section).

2Remove the access panel from the right side of the machine.

3See Figure 1. Loosen the (4) screws in the (A) Belt Guards.

FIGURE 1

20 - FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD

BRUSH DRIVE SYSTEM

FRONT

4Loosen the (B) Bolts and Nuts.

5Loosen the (C) Lock Nuts and turn the (D) Bolts to adjust 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.

6Follow steps 1-5 in reverse order to reassemble.

7After the adjustment is complete, test to make sure the belt does not slip.

_____________________________________________________________________________

BELT TENSION ADJUSTMENT - BA 800, 1000 / 32, 38LX / 320, 380HD

1Drain and tip the solution tank to the side of the machine.

2See Figure 2. Loosen the (E) Bolts and Nuts.

3Loosen the lock nuts and turn the (F) Bolts to adjust 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.

4After the adjustment is complete, test to make sure the belt does not slip.

_____________________________________________________________________________________________________________________________

BELT TENSION ADJUSTMENT - BA 700 / 28LX / 280HD (continued)

FIGURE 2

BA 800 / 32LX / 320HD BA 1000 / 38LX / 380HD

FORM NO. 56043025 / BA 700, 800, 1000 / 28LX, 32LX, 38LX / 280HD, 320HD, 380HD - 21

BRUSH DRIVE SYSTEM

_____________________________________________________________________________

BRUSH LIFT ACTUATOR LIMIT SWITCHES

_____________________________________________________________________________

LIMIT SWITCH ADJUSTMENT

1Remove the brushes, lower the brush drive and jack up the front of the machine about 2 inches. Put wood blocks

under the brush holders and lower the jack enough to take the weight of the brush drive assembly off the actuator.

2Drain and tip the solution tank to the side of the machine.

3See Figure 3. Loosen the (2) (G) Bolts and Nuts until the plastic nut on the actuator slips out of the brackets.

4Remove Ring (H) and Pin (I), lift the actuator up, but leave it plugged in.

FIGURE 3

FRONT

BA 700 / 28LX / 280HD

FRONT

BA 800, 1000 / 32, 38LX / 320, 380HD

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Nilfisk-Advance Convertamatic 28 User manual

Brand: Nilfisk-Advance

Model: Convertamatic 28

Category: Scrubber

Type: User manual

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Convertamatic 32

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