Nilfisk-Advance BA 1000 User manual

9/95 revised 3/01 Form Number 56043025
SERVICE MANUAL
Advance MODELS 56392290, 56392210,
56392220, 56392230, 56392240, 56392270
Ni fisk MODELS 56391372, 56392823,
56392824
Convertamatic™28/32/38LX
Hydro-Retriever™280/320/380HD
BA 700/800/1000

FORM NO. 56043025 / BA 700, 800, 1000 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD - 3
TABLE OF CONTENTS
SAFETY ...............................................................................................................................................................................4
SPECIFICATIONS & MAINTENANCE ............................................................................................................................. 5-8
KNOW YOUR MACHINE ............................................................................................................................................... 9-10
SO UTION SYSTEM ................................................................................................................................................... 11-18
MAINTENANCE ...............................................................................................................................................................11
F OW CONTRO VA VE REP ACEMENT - BA 700 / 28 X / 280HD ..................................................................... 11-12
F OW CONTRO VA VE REP ACEMENT - BA 800, 1000 / 32, 38 X / 320, 380HD ...................................................12
SO UTION CAB E REP ACEMENT - BA 700 / 28 X / 280HD ......................................................................................13
SO UTION CAB E REP ACEMENT - BA 800, 1000 / 32, 38 X / 320, 380HD ..............................................................14
SO UTION SO ENOID VA VE REMOVA - BA 700 / 28 X / 280HD ............................................................................15
SO UTION SO ENOID VA VE REMOVA - BA 800, 1000 / 32, 38 X / 320, 380HD ....................................................16
SO UTION SO ENOID VA VE DISASSEMB Y AND C EANING.................................................................................17
TROUB ESHOOTING .....................................................................................................................................................18
BRUSH DRIVE SYSTEM ............................................................................................................................................. 19-25
BRUSH DRIVE SYSTEM MAINTENANCE ......................................................................................................................19
BE T TENSION ADJUSTMENT - BA 700 / 28 X / 280HD ........................................................................................ 19-20
BE T TENSION ADJUSTMENT - BA 800, 1000 / 32, 38 X / 320, 380HD ......................................................................20
BRUSH IFT IMIT SWITCHES ................................................................................................................................ 21-23
IMIT SWITCH ADJUSTMENT ................................................................................................................................ 21-22
IMIT SWITCH REP ACEMENT ...................................................................................................................................23
BRUSH IFT ACTUATOR REP ACEMENT ....................................................................................................................24
TROUB ESHOOTING .....................................................................................................................................................25
VACUUM SYSTEM ...................................................................................................................................................... 26-32
VACUUM SYSTEM MAINTENANCE ......................................................................................................................... 26-27
VACUUM MOTOR REMOVA - BA 700 / 28 X / 280HD ................................................................................................27
VACUUM MOTOR REMOVA - BA 800, 1000 / 32, 38 X / 320, 380HD ........................................................................28
SQUEEGEE MAINTENANCE ..........................................................................................................................................29
SQUEEGEE ADJUSTMENT (BEFORE SN 1081111) .....................................................................................................29
SQUEEGEE ADJUSTMENT (AFTER SN 1081110) ........................................................................................................30
TROUB ESHOOTING ............................................................................................................................................... 31-32
WHEE DRIVE SYSTEM ............................................................................................................................................. 33-37
WHEE DRIVE SYSTEM MAINTENANCE ......................................................................................................................33
CHAIN REMOVA AND ADJUSTMENT .................................................................................................................... 33-34
DRIVE MOTOR REP ACEMENT ....................................................................................................................................34
DRIVE WHEE REP ACEMENT .....................................................................................................................................35
TROUB ESHOOTING .....................................................................................................................................................36
POTENTIOMETER ADJUSTMENT .................................................................................................................................37
BATTERY SYSTEM ..................................................................................................................................................... 38-39
BATTERY MAINTENANCE ..............................................................................................................................................38
BATTERY TESTING ........................................................................................................................................................39
E ECTRICA SYSTEM................................................................................................................................................ 41-46
E ECTRICA COMPONENT OCATION........................................................................................................................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 / 28 X, 32 X, 38 X / 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 / 28 X, 32 X, 38 X / 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 ength 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 / 28 X, 32 X, 38 X / 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 ength 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 / 28 X, 32 X, 38 X / 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 ength 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 / 28 X, 32 X, 38 X / 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
ubrication 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 “DISPOSA 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 “DISPOSA 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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD - 9
KNOW YOUR MACHINE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
_________________________________________________________________________________________________________________
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 / 28 X, 32 X, 38 X / 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
21
19
20

FORM NO. 56043025 / BA 700, 800, 1000 / 28 X, 32 X, 38 X / 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 “DISPOSA 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) - owered
• Twist Grips (2) - Forward slightly
• Solution Flow Control ever (1) - Pulled Back
5et 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
“DISPOSA 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 / 28 X, 32 X, 38 X / 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 “DISPOSA 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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD - 13
SOLUTION SYSTEM
K
J
FIGURE 3
______________________________________________________________________________________________
SOLUTION CABLE REPLACEMENT BA 700 / 28LX / 280HD
1Drain the solution tank at a designated
“DISPOSA 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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD
SOLUTION SYSTEM
______________________________________________________________________________________________
SOLUTION CABLE REPLACEMENT BA 800, 1000 / 32, 38LX / 320, 380HD
1Drain the solution tank at a designated “DISPOSA 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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD - 15
SOLUTION SYSTEM
N
M
OFRONT
WT
X
U
V
R
Q
SP
______________________________________________________________________________________________
SOLUTION SOLENOID VALVE REMOVAL BA 700 / 28LX / 280HD
1Drain the solution and recovery
tanks at a designated “DISPOSA
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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD
SOLUTION SYSTEM
Z
Y
AA
FRONT
EE HH
BB
JJ
FF
IICC
DD
______________________________________________________________________________________________
SOLUTION SOLENOID VALVE REMOVAL BA 800, 1000 / 32, 38LX / 320, 380HD
1Drain the solution and recovery
tanks at a designated “DISPOSA
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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD - 17
SOLUTION SYSTEM
MM
LL
KK
KK
______________________________________________________________________________________________
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 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD
SOLUTION SYSTEM
______________________________________________________________________________________________
TROUBLESHOOTING
______________________________________________________________________________________________
PROBLEM: NO SO UTION F OW
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 ever - 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: SO UTION EAKS 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 / 28 X, 32 X, 38 X / 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 Re lacement section).
2Remove the access panel from the right side of the machine.
3See Figure 1. oosen the (4) screws in the (A) Belt Guards.
FIGURE 1

20 - FORM NO. 56043025 / BA 700, 800, 1000 / 28 X, 32 X, 38 X / 280HD, 320HD, 380HD
BRUSH DRIVE SYSTEM
F
FRONT
E
E
E
FRONT
F
E
4oosen the (B) Bolts and Nuts.
5oosen the (C) ock 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. oosen the (E) Bolts and Nuts.
3oosen 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 / 28 X, 32 X, 38 X / 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. oosen 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
H
I
BA 700 / 28LX / 280HD
FRONT
I
H
BA 800, 1000 / 32, 38LX / 320, 380HD