Tennant 186E User manual

186E
MM160
Rev. 12 (12–95)
(Operator Manual)

This manual is furnished with each new TENNANT Model 186E. It provides necessary operating and
preventive maintenance instructions. Read this manual completely and understand the machine before
operating or servicing it.
This manual covers all machine variations and standard options. The instruction portion of the manual
consists of the Specification, Operation, Maintenance, and Appendix sections. The parts portion consists
of the Standard Parts; EE Parts; Options; Electrical Components; and Cross Reference sections.
All right side and left side references to the machine are determined by facing the direction of forward
travel. All hardware considered to be of a common nature or locally available has been omitted from the
parts sections. Be aware that this machine may contain metric hardware. Make sure you use equivalent
hardware when replacement becomes necessary.
This machine will provide excellent service. However, the best results will be obtained at minimum costs
if:
 The machine is operated with reasonable care.
 The machine is maintained regularly – per the maintenance instructions provided.
 The machine is maintained with Tennant Company supplied or equivalent parts.
Parts and supplies may be ordered by phone or mail from any Tennant Company parts and service
center, distributor, or from any of the Tennant Company subsidiaries. Before ordering parts or supplies, be
sure to have your machine model number and serial number handy. Fill out the data block below for future
reference.
MACHINE DATA
Please fill out at time of installation.
Machine Serial Number –
Engine Serial Number –
Sales Representative –
Customer Number –
Date of Installation –
Manual Number – MM160
Revision: 12
Published: 12–95
Trademark Registered in: Austria, Benelux, Denmark, England, France, Germany, Italy, Spain,
Switzerland, United States, Argentina, Australia, Canada, Japan, Mexico, Sweden, by TENNANT
COMPANY, Minneapolis, Minnesota, U.S.A.
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1994, 1995 Tennant Company, Printed in U.S.A.

GENERAL INFORMATION
i
186EMM160 (6–94)
SAFETY PRECAUTIONS
The following symbols are used throughout this
manual as indicated in their descriptions:
WARNING: To warn of hazards or
unsafe practices which could result in
severe personal injury or death.
FOR SAFETY: To identify actions which must
be followed for safe operation of equipment.
The following information signals potentially
dangerous conditions to the operator or
equipment. Read this manual carefully. Know
when these conditions can exist. Locate all safety
devices on the machine. Then, take necessary
steps to train machine operating personnel.
Report machine damage or faulty operation
immediately. Do not use the machine if it is not in
proper operating condition.
FOR SAFETY:
1. Do Not Operate Machine:
–Unless Trained And Authorized.
–Unless Operation Manual Is Read And
Understood.
–In Flammable Or Explosive Areas
Unless Designed For Use In Those
Areas.
2. Before Starting Machine:
–Make Sure All Safety Devices Are In
Place And Operate Properly.
–Check Brakes And Steering For Proper
Operation.
3. When Using Machine:
–Go Slow On Grades And Slippery
Surfaces.
–Use Care When Backing Machine.
4. Before Leaving Or Servicing Machine:
–Stop On Level Surface.
–Set Parking Brake.
–Turn Off Machine And Remove Key.
5. When Servicing Machine:
–Avoid Moving Parts. Do Not Wear
Loose Jackets, Shirts, Or Sleeves
When Working On Machine.
–Use Hoist Or Jack Of Adequate
Capacity To Lift Machine.
–Wear Eye And Ear Protection When
Using Pressurized Air Or Water.
–Disconnect Battery Connections
Before Working On Machine.
–Avoid Contact With Battery Acid.
–Use TENNANT Supplied Or Equivalent
Replacement Parts.
WARNING: Batteries Emit Hydrogen
Gas. Explosion Or Fire Can Result.
Keep Sparks And Open Flame Away. Keep
Covers Open When Charging.
WARNING: Heavy Hopper. Get Help To
Handle.
WARNING: Flammable Materials Can
Cause An Explosion Or Fire. Do Not
Use Flammable Materials In Tank(s).
WARNING: Flammable Materials Or
Reactive Metals Can Cause Explosion
Or Fire. Do Not Pick Up.

GENERAL INFORMATION
186EMM160 (6–94)
ii
The following safety decals are mounted on the
machine in the locations indicated. If these, or any
decal becomes damaged or illegible, install a new
decal in its place. BATTERY CAUTION LABEL –LOCATED
BETWEEN THE BATTERIES.
03167
FOR SAFETY LABEL –LOCATED ON THE
TOP OF THE SOLUTION TANK.
FLAMMABLE MATERIALS LABEL –
LOCATED ON RIGHT SIDE PANEL.
FLAMMABLE MATERIALS LABEL –
LOCATED ON RIGHT SIDE PANEL. BACK STRAIN LABEL –LOCATED ON THE
UNDERSIDE OF THE FILTER ASSEMBLY.

GENERAL INFORMATION
iii
186EMM160 (6–94)
CONTENTS
Page
GENERAL INFORMATION i. . . . . . . . . . . . . .
SAFETY PRECAUTIONS i. . . . . . . . . . .
SPECIFICATIONS 1-1. . . . . . . . . . . . . . . . . . . . .
MACHINE SPECIFICATIONS 1-3. . . . . . . .
POWER TYPE 1-3. . . . . . . . . . . . . . . . . .
POWER TRAIN 1-3. . . . . . . . . . . . . . . . .
SUSPENSION SYSTEM 1-3. . . . . . . . .
SYSTEM FLUID CAPACITIES 1-3. . . .
GENERAL MACHINE DIMENSIONS –
CAPACITIES 1-3. . . . . . . . . . . . . . . . .
MACHINE WEIGHTS 1-3. . . . . . . . . . . .
GENERAL MACHINE
PERFORMANCE 1-3. . . . . . . . . . . . .
MACHINE DIMENSIONS 1-4. . . . . . . . . . . .
OPERATION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . .
PREPARATION FOR OPERATION 2-3. . .
AFTER UNCRATING AND BEFORE
OPERATING MACHINE: 2-3. . . . . .
OPERATION OF CONTROLS 2-4. . . . . . .
MACHINE COMPONENTS 2-4. . . . . . . . . .
INSTRUMENT PANEL SYMBOLS 2-5.
CONTROLS AND INSTRUMENTS
(For machines below serial
number 006000) 2-6. . . . . . . . . . . . . .
CONTROLS AND INSTRUMENTS
(For machines serial number
006000 and above) 2-7. . . . . . . . . . .
STATIONARY AND CLUTCH
HANDLES 2-8. . . . . . . . . . . . . . . . . . .
FILTER SHAKER SWITCH 2-8. . . . . . .
FILTER SHAKER BY-PASS SWITCH 2-8
BATTERY CONDITION GAUGE 2-8. . .
VOLTMETER 2-8. . . . . . . . . . . . . . . . . . .
MAIN BRUSH LEVER 2-9. . . . . . . . . . . .
HOUR METER 2-9. . . . . . . . . . . . . . . . . .
KEY-OPERATED ON-OFF SWITCH 2-9
CIRCUIT BREAKERS AND FUSES 2-9
VACUUM FAN SWITCH 2-9. . . . . . . . . .
CHARGER TIMER 2-9. . . . . . . . . . . . . . .
CHARGER GAUGE 2-10. . . . . . . . . . . . . .
VACUUM SHUT-OFF KNOB 2-10. . . . . .
CHARGER PANEL 2-10. . . . . . . . . . . . . .
PARKING BRAKE LEVER 2-10. . . . . . . .
SQUEEGEE LEVER 2-10. . . . . . . . . . . . .
SOLUTION LEVER 2-11. . . . . . . . . . . . . .
SIDE BRUSH ARM 2-11. . . . . . . . . . . . . .
THERMO-SENTRY2-11. . . . . . . . . . . .
Page
MACHINE OPERATION 2-12. . . . . . . . . . . . .
NORMAL SWEEPING OPERATION 2-12
PRE-START CHECKLIST 2-12. . . . . .
TO START MACHINE 2-12. . . . . . . . .
TO SWEEP 2-12. . . . . . . . . . . . . . . . . .
TO DUMP HOPPER 2-12. . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR OPERATING 2-13. . . . . .
TO STOP MACHINE 2-13. . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR STOPPED 2-13. . . . . . . .
NORMAL SCRUBBING OPERATION 2-13
PRE-START CHECKLIST 2-13. . . . . .
TO START MACHINE 2-14. . . . . . . . .
TO SCRUB 2-14. . . . . . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK
AND EMPTY DEBRIS TRAY 2-15
POST OPERATION CHECKLIST –
MOTOR OPERATING 2-16. . . . . .
TO STOP MACHINE 2-16. . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR STOPPED 2-16. . . . . . . .
DOUBLE SCRUBBING OPERATION 2-17
OPERATION ON GRADES 2-17. . . . . . .
VACUUM WAND OPTION 2-17. . . . . . . .
TO OPERATE VACUUM WAND 2-17
FILTER BYPASS OPTION 2-18. . . . . . . .
WATER PICKUP OPTION 2-18. . . . . . . .
TO OPERATE THE WATER
PICKUP OPTION 2-18. . . . . . . . . .
SCRUB ATTACHMENT 2-18. . . . . . . . . .
TO MOUNT SOLUTION TANK
AND DEBRIS TRAY 2-19. . . . . . . .
TO REMOVE SOLUTION TANK
AND DEBRIS TRAY 2-20. . . . . . . .
MACHINE TROUBLESHOOTING 2-21.
TRANSPORTING MACHINE 2-22. . . . . . . . .
MACHINE TIE-DOWNS 2-22. . . . . . . . . .
MACHINE STORAGE 2-23. . . . . . . . . . . . . . .
STORING MACHINE 2-23. . . . . . . . . . . .

GENERAL INFORMATION
186EMM160 (6–94)
iv
Page
MAINTENANCE 3-1. . . . . . . . . . . . . . . . . . . . . . .
RECOMMENDED FIRST 25-HOUR
MACHINE INSPECTION 3-3. . . . . . . . .
MAINTENANCE CHART 3-4. . . . . . . . . . . .
LUBRICATION 3-6. . . . . . . . . . . . . . . . . . . . .
DRIVE CHAINS 3-6. . . . . . . . . . . . . . . . .
BRUSH ARM PIVOTS 3-6. . . . . . . . . . .
SIDE BRUSH GEAR BOX 3-6. . . . . . . .
REAR CASTER 3-7. . . . . . . . . . . . . . . . .
SELF ADJUSTING SHEAVE 3-7. . . . . .
SQUEEGEE PIVOT 3-7. . . . . . . . . . . . .
ELECTRICAL SYSTEM 3-8. . . . . . . . . . . . .
BATTERIES 3-8. . . . . . . . . . . . . . . . . . . .
BATTERY CHARGING 3-9. . . . . . . . . . .
TO CHARGE BATTERIES
(For machines below serial
number 006823) 3-9. . . . . . . . . . .
TO CHARGE BATTERIES
(For machines serial number
006823 and above) 3-10. . . . . . . . .
ACTIVATING DRY-TYPE
BATTERIES 3-11. . . . . . . . . . . . . . . . .
TO ACTIVATE DRY-TYPE
BATTERIES 3-11. . . . . . . . . . . . . . .
ELECTRIC MOTOR 3-11. . . . . . . . . . . . .
ELECTRICAL SCHEMATIC, 186E
(For machines below serial
number 004369) 3-12. . . . . . . . . . . . . .
ELECTRICAL SCHEMATIC, 186E
(For machines serial number
004369 to 006822) 3-13. . . . . . . . . . . .
ELECTRICAL SCHEMATIC, 186E
(For machines serial number
006823 and above) 3-14. . . . . . . . . . .
ELECTRICAL SCHEMATIC, 186EE
(For machines below serial
number 006823) 3-15. . . . . . . . . . . . . .
ELECTRICAL SCHEMATIC, 186EE
(For machines serial number
006823 and above) 3-16. . . . . . . . . . .
BELTS AND CHAINS 3-17. . . . . . . . . . . . . . .
PROPELLING BELTS 3-17. . . . . . . . . . . .
TO CHECK AND ADJUST
PROPELLING
BELTS TENSION 3-17. . . . . . . . . . . . .
TO REPLACE PROPELLING
BELTS 3-18. . . . . . . . . . . . . . . . . . .
SIDE BRUSH BELT 3-19. . . . . . . . . . . . . .
TO CHECK AND ADJUST SIDE
BRUSH BELT TENSION 3-19. . . .
TO REPLACE SIDE BRUSH
BELT 3-20. . . . . . . . . . . . . . . . . . . . .
SHORT MAIN BRUSH BELT 3-20. . . . . .
TO REPLACE SHORT MAIN
BRUSH BELT 3-20. . . . . . . . . . . . .
LONG MAIN BRUSH BELT 3-21. . . . . . .
TO REPLACE LONG MAIN
BRUSH BELT 3-21. . . . . . . . . . . . .
Page
VACUUM FAN BELT 3-22. . . . . . . . . . . . .
TO CHECK AND ADJUST VACUUM
FAN BELT TENSION 3-22. . . . . . .
TO REPLACE VACUUM
FAN BELT 3-24. . . . . . . . . . . . . . . .
WHEEL DRIVE CHAINS 3-24. . . . . . . . .
STATIC DRAG CHAIN 3-24. . . . . . . . . . .
BRUSHES 3-25. . . . . . . . . . . . . . . . . . . . . . . . .
MAIN BRUSH 3-25. . . . . . . . . . . . . . . . . . .
TO REMOVE MAIN BRUSH 3-25. . .
TO INSTALL MAIN BRUSH 3-25. . . .
TO CHECK AND ADJUST MAIN
BRUSH PATTERN 3-25. . . . . . . . .
SIDE BRUSH 3-26. . . . . . . . . . . . . . . . . . .
TO REMOVE SIDE BRUSH 3-26. . . .
TO INSTALL SIDE BRUSH 3-27. . . .
TO ADJUST SIDE BRUSH
PATTERN 3-27. . . . . . . . . . . . . . . . .
SKIRTS AND SEALS 3-28. . . . . . . . . . . . . . .
HOPPER LIP SKIRT 3-28. . . . . . . . . . . . .
REAR BRUSH SKIRTS 3-28. . . . . . . . . .
HOPPER TOP SEAL 3-28. . . . . . . . . . . . .
MAIN BRUSH COMPARTMENT
SKIRTS 3-28. . . . . . . . . . . . . . . . . . . . .
DEBRIS HOPPER AND DUST FILTER 3-29
DEBRIS HOPPER 3-29. . . . . . . . . . . . . . .
TO CHECK AND ADJUST HOPPER
FLOOR CLEARANCE 3-29. . . . . .
TO ADJUST DUST FILTER TO
HOPPER SEALING 3-30. . . . . . . .
DUST FILTER 3-30. . . . . . . . . . . . . . . . . . .
TO REMOVE HOPPER DUST
FILTER 3-31. . . . . . . . . . . . . . . . . . .
VACUUM WAND OPTION 3-32. . . . . . . . . . .
VACUUM WAND OPTION 3-32. . . . . . . .
TO REPLACE VACUUM WAND
BAG 3-32. . . . . . . . . . . . . . . . . . . . .
TO CLEAN VACUUM FAN
FILTER 3-32. . . . . . . . . . . . . . . . . . .
WATER PICKUP OPTION 3-33. . . . . . . . . . .
WATER PICKUP OPTION 3-33. . . . . . . .
VACUUM FAN 3-33. . . . . . . . . . . . . . . . . .
RECOVERY TANK 3-33. . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK 3-33.
REAR SQUEEGEE 3-34. . . . . . . . . . . . . .
TO REMOVE SQUEEGEE
ASSEMBLY 3-34. . . . . . . . . . . . . . .
TO INSTALL SQUEEGEE
ASSEMBLY 3-35. . . . . . . . . . . . . . .
TO REPLACE FRONT
SQUEEGEE BLADE 3-35. . . . . . .
TO REPLACE REAR
SQUEEGEE BLADE 3-36. . . . . . .
TO ADJUST SQUEEGEE 3-37. . . . . .

GENERAL INFORMATION
v
186EMM160 (6–94)
Page
SCRUB ATTACHMENT 3-39. . . . . . . . . . . . .
SCRUB ATTACHMENT 3-39. . . . . . . . . .
SOLUTION TANK 3-39. . . . . . . . . . . . . . .
SOLUTION DISTRIBUTION
SYSTEM 3-39. . . . . . . . . . . . . . . . . . . .
DEBRIS TRAY 3-40. . . . . . . . . . . . . . . . . .
TO CHECK AND ADJUST DEBRIS
TRAY FLOOR CLEARANCE 3-40
SCRUB BRUSHES 3-40. . . . . . . . . . . . . .
RECOVERY TANK 3-41. . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK 3-41.
VACUUM FAN 3-41. . . . . . . . . . . . . . . . . .
REAR SQUEEGEE 3-42. . . . . . . . . . . . . .
TO REMOVE SQUEEGEE
ASSEMBLY 3-42. . . . . . . . . . . . . . .
TO INSTALL SQUEEGEE
ASSEMBLY 3-43. . . . . . . . . . . . . . .
TO REPLACE FRONT
SQUEEGEE BLADE 3-43. . . . . . .
TO REPLACE REAR
SQUEEGEE BLADE 3-44. . . . . . .
TO ADJUST SQUEEGEE 3-46. . . . . .
APPENDIX 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HARDWARE INFORMATION 4-3. . . . . . . . . . .
STANDARD BOLT TORQUE CHART 4-3.
METRIC BOLT TORQUE CHART 4-3. . . .
BOLT IDENTIFICATION 4-3. . . . . . . . . . . . .
THREAD SEALANT AND LOCKING
COMPOUNDS 4-3. . . . . . . . . . . . . . . . . .
HOW TO USE THIS MANUAL 5-1. . . . . . . . . . . . .
IMPORTANT INFORMATION 5-1. . . . . . . . . . .
FINDING A TENNANT PART NUMBER 5-2. .
PLACING AN ORDER 5-3. . . . . . . . . . . . . . . . .
STANDARD PARTS 6-1. . . . . . . . . . . . . . . . . . . . . .
Fig. 1 –Recommended General
Maintenance Items 6-2. . . . . . . . .
Fig. 2 –Replacement Brushes 6-3. . . . . . . . . .
Fig. 3 –Main Frame Group 6-4. . . . . . . . . . . . .
Fig. 4 –Motor, Sheaves and
Cover Group 6-6. . . . . . . . . . . . . .
Fig. 5 –Motor, Sheaves and
Cover Group 6-8. . . . . . . . . . . . . .
Fig. 6 –Battery and Charger Group 6-10. . . .
Fig. 7 –Brush Drive Group 6-12. . . . . . . . . . . .
Fig. 8 –Wheel Drive Group 6-14. . . . . . . . . . .
Fig. 9 –Hopper Group 6-15. . . . . . . . . . . . . . . .
Fig. 10 –Vacuum Fan Group 6-16. . . . . . . . . . .
Fig. 11 –Filter and Shaker Motor Group 6-17.
Fig. 12 –Instrument Panel Group 6-18. . . . . . .
Fig. 13 –Instrument Panel Group 6-19. . . . . . .
Fig. 14 –Label Group 6-20. . . . . . . . . . . . . . . . .
Fig. 15 –Label Group 6-21. . . . . . . . . . . . . . . . .
Fig. 16 –Wire Harnesses Group 6-22. . . . . . . .
Fig. 17 –Wire Harnesses Group 6-24. . . . . . . .
Fig. 18 –Wire Harnesses Group 6-26. . . . . . . .
Page
EE PARTS 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fig. 1 –Electrical Components
Group, EE 7-2. . . . . . . . . . . . . . . .
Fig. 2 –Electrical Components
Group, EE 7-4. . . . . . . . . . . . . . . .
Fig. 3 –Wire Harnesses Group, EE 7-6. . . . . .
Fig. 4 –Wire Harnesses Group, EE 7-8. . . . . .
Fig. 5 –Wire Harnesses Group, EE 7-10. . . . .
Fig. 6 –Cover Retainer Group, EE 7-12. . . . . .
OPTIONS 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fig. 1 –Solution Tank Group 8-2. . . . . . . . . . .
Fig. 2 –Recovery Tank Group 8-4. . . . . . . . . .
Fig. 3 –Rear Squeegee Lift Group 8-6. . . . . .
Fig. 4 –Rear Squeegee Group 8-8. . . . . . . . .
Fig. 5 –Side Scrub Brush Group 8-9. . . . . . . .
Fig. 6 –Scrub Vacuum Fan Group 8-10. . . . .
Fig. 7 –Filter Bypass Kit 8-11. . . . . . . . . . . . . .
Fig. 8 –Recovery Tank Group,
Water Pickup 8-12. . . . . . . . . . . . .
Fig. 9 –Parking Brake Kit 8-14. . . . . . . . . . . . .
Fig. 10 –Parking Brake Kit 8-15. . . . . . . . . . . .
Fig. 11 –Vacuum Wand Group 8-16. . . . . . . . .
Fig. 12 –Wand Vacuum Fan Group 8-17. . . . .
Fig. 13 –Vacuum Wand Group 8-18. . . . . . . . .
Fig. 14 –Battery Kit, Wet 8-19. . . . . . . . . . . . . .
Fig. 15 –Battery Kit, Dry 8-20. . . . . . . . . . . . . .
Fig. 16 –Battery Charger and
Timer Group 8-21. . . . . . . . . . . . . .
Fig. 17 –Battery Charger and
Timer Group 8-22. . . . . . . . . . . . . .
Fig. 18 –Battery Charger and
Timer Group 8-23. . . . . . . . . . . . . .
Fig. 19 –Battery Charger Group 8-24. . . . . . . .
Fig. 20 –Fire Extinguisher Kit 8-25. . . . . . . . . .
Fig. 21 –Battery Gauge Kit 8-26. . . . . . . . . . . .
Fig. 22 –Double Wheel Kit 8-27. . . . . . . . . . . .
Fig. 23 –Dual Caster Group 8-28. . . . . . . . . . .
Fig. 24 –Plastic Hopper Kit 8-29. . . . . . . . . . . .
Fig. 25 –Fine Particle Filter Kit 8-30. . . . . . . . .
Fig. 26 –Lift and Tie–Down Kit 8-31. . . . . . . . .
ELECTRICAL COMPONENTS 9-1. . . . . . . . . . . . .
Fig. 1 –Motor Breakdown 9-2. . . . . . . . . . . . . .
CROSS REFERENCE 10-1. . . . . . . . . . . . . . . . . . .
PART NUMBER TO PAGE NUMBER
CROSS REFERENCE LIST 10-2. . . . . . . . . . .

GENERAL INFORMATION
186EMM160 (6–94)
vi

SPECIFICATIONS
1Ć1
186E MM160 (6–94)
SECTION 1
CONTENTS
Page
MACHINE SPECIFICATIONS 1-3. . . . . . . . . . . .
POWER TYPE 1-3. . . . . . . . . . . . . . . . . . . . . .
POWER TRAIN 1-3. . . . . . . . . . . . . . . . . . . . .
SUSPENSION SYSTEM 1-3. . . . . . . . . . . . .
SYSTEM FLUID CAPACITIES 1-3. . . . . . . .
GENERAL MACHINE DIMENSIONS –
CAPACITIES 1-3. . . . . . . . . . . . . . . . . . . . .
MACHINE WEIGHTS 1-3. . . . . . . . . . . . . . . .
GENERAL MACHINE PERFORMANCE 1-3
MACHINE DIMENSIONS 1-4. . . . . . . . . . . . . . . .

SPECIFICATIONS
186E MM160 (6–94)
1Ć2

SPECIFICATIONS
1Ć3
186E MM160 (6–94)
MACHINE SPECIFICATIONS
POWER TYPE
Electric propelling motor –nominal voltage
24 VDC, 1.0 hp (0.7 kw) @ 2000 rpm, 40 A
Batteries (2) –12 V, 140 A/h @ 20 hour rate
Battery charger –24 VDC, 15 A, 120 VAC input
Battery charger –24 VDC, 15 A, 115/230 VAC
POWER TRAIN
Propelling –belt driven
Differential –belt driven
Drive axle (2) –chain driven
Main brush –belt driven
Side brush –belt driven
Vacuum fan –belt driven
Scrub attachment/vacuum fan water pick-up –
electric motor driven
SUSPENSION SYSTEM
Front –10 x 2.00 zero pressure tires (2)
Rear –5 x 1.5 caster (1)
SYSTEM FLUID CAPACITIES
Scrub attachment solution tank –14.5 gal (55 L)
Scrub attachment recovery tank –13 gal (50 L)
GENERAL MACHINE DIMENSIONS –
CAPACITIES
Length –58 in (1475 mm)
Width –36 in (915 mm) less side brush
Height –38 in (965 mm)
Track –front 31 in (790 mm)
Wheel base –23.5 in (595 mm)
Main brush –width 26 in (660 mm)
Main brush –diameter 10 in (255 mm)
Side brush –diameter 17 in (430 mm)
Sweeping path width (total) –34 in (860 mm)
Hopper capacity –2.8 cu ft (0.08 m) 150 lb
(68 kg)
Dust filter –49 sq ft (4.55 m), pleated panel
filter element
MACHINE WEIGHTS
GVWR –760 lb (345 kg)
GENERAL MACHINE PERFORMANCE
Maximum forward speed –2.9 mph (4.7 km/h)
Maximum reverse speed –2.8 mph (4.5 km/h)
Turning radius –65 in (1650 mm)

SPECIFICATIONS
186EMM160 (6–94)
1Ć4
MACHINE DIMENSIONS
SIDE VIEW
TOP VIEW
36 in
(915 mm)
58 in (1475 mm)
38 in
(965 mm)
03131

OPERATION
2Ć1
186EMM160 (6–94)
SECTION 2
CONTENTS
Page
PREPARATION FOR OPERATION 2-3. . . . . . .
AFTER UNCRATING AND BEFORE
OPERATING MACHINE: 2-3. . . . . . . . . .
OPERATION OF CONTROLS 2-4. . . . . . . . . . .
MACHINE COMPONENTS 2-4. . . . . . . . . . . . . .
INSTRUMENT PANEL SYMBOLS 2-5. . . . .
CONTROLS AND INSTRUMENTS
(For machines below serial
number 006000) 2-6. . . . . . . . . . . . . . . . . .
CONTROLS AND INSTRUMENTS
(For machines serial number
006000 and above) 2-7. . . . . . . . . . . . . . .
STATIONARY AND CLUTCH HANDLES 2-8
FILTER SHAKER SWITCH 2-8. . . . . . . . . . .
FILTER SHAKER BY-PASS SWITCH 2-8. .
BATTERY CONDITION GAUGE 2-8. . . . . .
VOLTMETER 2-8. . . . . . . . . . . . . . . . . . . . . . .
MAIN BRUSH LEVER 2-9. . . . . . . . . . . . . . . .
HOUR METER 2-9. . . . . . . . . . . . . . . . . . . . . .
KEY-OPERATED ON-OFF SWITCH 2-9. . .
CIRCUIT BREAKERS AND FUSES 2-9. . . .
VACUUM FAN SWITCH 2-9. . . . . . . . . . . . . .
CHARGER TIMER 2-9. . . . . . . . . . . . . . . . . .
CHARGER GAUGE 2-10. . . . . . . . . . . . . . . . .
VACUUM SHUT-OFF KNOB 2-10. . . . . . . . . .
CHARGER PANEL 2-10. . . . . . . . . . . . . . . . . .
PARKING BRAKE LEVER 2-10. . . . . . . . . . . .
SQUEEGEE LEVER 2-10. . . . . . . . . . . . . . . . .
SOLUTION LEVER 2-11. . . . . . . . . . . . . . . . . .
SIDE BRUSH ARM 2-11. . . . . . . . . . . . . . . . . .
THERMO-SENTRY2-11. . . . . . . . . . . . . . . .
MACHINE OPERATION 2-12. . . . . . . . . . . . . . . . .
NORMAL SWEEPING OPERATION 2-12. . .
PRE-START CHECKLIST 2-12. . . . . . . . .
TO START MACHINE 2-12. . . . . . . . . . . . .
TO SWEEP 2-12. . . . . . . . . . . . . . . . . . . . . .
TO DUMP HOPPER 2-12. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR OPERATING 2-13. . . . . . . . . .
TO STOP MACHINE 2-13. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR STOPPED 2-13. . . . . . . . . . . .
Page
NORMAL SCRUBBING OPERATION 2-13. .
PRE-START CHECKLIST 2-13. . . . . . . . .
TO START MACHINE 2-14. . . . . . . . . . . . .
TO SCRUB 2-14. . . . . . . . . . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK
AND EMPTY DEBRIS TRAY 2-15. . . .
POST OPERATION CHECKLIST –
MOTOR OPERATING 2-16. . . . . . . . . .
TO STOP MACHINE 2-16. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
MOTOR STOPPED 2-16. . . . . . . . . . . .
DOUBLE SCRUBBING OPERATION 2-17. .
OPERATION ON GRADES 2-17. . . . . . . . . . .
VACUUM WAND OPTION 2-17. . . . . . . . . . . .
TO OPERATE VACUUM WAND 2-17. . . .
FILTER BYPASS OPTION 2-18. . . . . . . . . . . .
WATER PICKUP OPTION 2-18. . . . . . . . . . . .
TO OPERATE THE WATER
PICKUP OPTION 2-18. . . . . . . . . . . . . .
SCRUB ATTACHMENT 2-18. . . . . . . . . . . . . .
TO MOUNT SOLUTION TANK AND
DEBRIS TRAY 2-19. . . . . . . . . . . . . . . .
TO REMOVE SOLUTION TANK
AND DEBRIS TRAY 2-20. . . . . . . . . . .
MACHINE TROUBLESHOOTING 2-21. . . . .
TRANSPORTING MACHINE 2-22. . . . . . . . . . . .
MACHINE TIE-DOWNS 2-22. . . . . . . . . . . . . .
MACHINE STORAGE 2-23. . . . . . . . . . . . . . . . . .
STORING MACHINE 2-23. . . . . . . . . . . . . . . .

OPERATION
186E MM160 (6–94)
2Ć2

OPERATION
2Ć3
186E MM160 (6–94)
PREPARATION FOR OPERATION
AFTER UNCRATING AND BEFORE
OPERATING MACHINE:
1. Check the machine for shipping damage.
2. Read this manual carefully before operating
or servicing the machine.
FOR SAFETY: Do Not Operate Machine,
Unless Operation Manual Is Read And
Understood.
3. Check the batteries. If they are of the
wet-type, check the electrolyte level. If they
are of the dry-type, activate them as
described in ACTIVATING DRY-TYPE
BATTERIES in the MAINTENANCE section.
A
B
00879
CHECKING BATTERY ELECTROLYTE LEVEL
A. Battery
B. Electrolyte Indicator Ring
FOR SAFETY: When Servicing Machine, Avoid
Contact With Battery Acid.
4. Check the battery specific gravity to
determine the state of charge as described
in BATTERIES in the MAINTENANCE
section. Charge the batteries if necessary.
5. Connect the batteries-to-machine connector.
A
B
03177
CONNECTING BATTERIES-TO-MACHINE
CONNECTOR
A. Machine Connector
B. Batteries Connector
6. Check the main brush adjustment. See
BRUSHES in the MAINTENANCE section.

OPERATION
186EMM160 (6–94)
2Ć4
OPERATION OF CONTROLS
ABC
D
E
F
G
I
J
K
L
M
N
O
P
Q
03167
03146
MACHINE COMPONENTS
A. Clutch Handle J. Inspection Door
B. Stationary Handle K. Solution Lever
C. Left Access Cover L. Recovery Tank
D. Filter Cover M. Squeegee Suction Hose
E. Hopper N. Squeegee
F. Side Brush O. Drain Hose
G. Side Brush Arm P. Squeegee Lift Lever
H. Right Access Cover Q. Parking Brake Lever
I. Instrument Panel

OPERATION
2Ć5
186EMM160 (6–94)
INSTRUMENT PANEL SYMBOLS
The symbols are used to identify controls and
displays on the machine:
Filter Shaker
Circuit Breaker No. 3
Fan
Main Brush Free-Float
Main Brush Down
Main Brush Up
Circuit Breaker No. 1
Circuit Breaker No. 2
Vacuum Shut-Off
Key Switch
Parking Brake
Side Brush
Interrupt Switch
Battery Charger Interrupt
Battery Charger
Battery

OPERATION
186EMM160 (6–94)
2Ć6
J
K
A
G
C
D
B
F
I
E
L
M
03169
03197
CONTROLS AND INSTRUMENTS
(For machines below serial number 006000)
A. Stationary Handle H. Clutch Handle
B. Filter Shaker Switch I. Circuit Breakers
C. Filter Shaker By-Pass Switch J. Vacuum Fan Switch
D. Battery Condition Gauge K. Charger Timer
E. Main Brush Lever L. Charger Gauge
F. Hour Meter M. Vacuum Shut-Off Knob
G. Key-Operated On-Off Switch

OPERATION
2Ć7
186EMM160 (6–94)
K
L
J
A
FB
CE
G
ID
M
II
For machines serial number 006000 to 006822) (For machines serial number 006823 and above)
N
06440
03197
07128
CONTROLS AND INSTRUMENTS
(For machines serial number 006000 and above)
A. Stationary Handle H. Clutch Reverse Handle
B. Filter Shaker By-Pass Switch I. Circuit Breakers
C. Battery Condition Gauge/Voltmeter J. Vacuum Fan Switch
D. Main Brush Lever K. Charger Timer
E. Hour Meter L. Charger Gauge
F. Key-Operated On-Off Switch M. Vacuum Shut-Off Knob
G. Clutch Handle N. Charger Panel

OPERATION
186EMM160 (6–94)
2Ć8
STATIONARY AND CLUTCH HANDLES
The stationary and clutch handles control the
wheel drive clutch.
To move the machine forward for machines below
serial number 006000, press the clutch handle
until the desired speed is reached. To stop the
machine, release the handle.
To move the machine forward for machines serial
number 006000 and above, pull the clutch handle
until the desired speed is reached. To stop the
machine, release the handle.
To move the machine backward for machines
below serial number 006000, pull the clutch
handle. To stop the machine, release the handle.
To move the machine backward for machines
serial number 006000 and above, press the clutch
reverse handle. To stop the machine, release the
handle.
FILTER SHAKER SWITCH
The filter shaker switch, for machines before
serial number 004369, operates the dust filter
shaker motor. The shaker motor shakes the dust
out of the dust filter. To shake the filter, press the
switch for 15 seconds. Release the switch to stop
the filter shaker.
FILTER SHAKER BY-PASS SWITCH
The filter shaker by-pass switch , for
machines serial number 004369 and above,
controls the automatic filter shaker. When the
switch is in the “on”position, the filter shaker
motor will shake the dust from the filter for 20
seconds when the machine is turned off. When
the switch is in the “off”position, the filter shaker
motor will not shake the dust from the filter when
the machine is turned off. The switch should be in
the “off”position when servicing the machine or
when using the scrubber attachment.
BATTERY CONDITION GAUGE
The battery condition gauge is an option on
machines below serial number 006823. It
indicates the present state of charge of the
batteries. The display should be on the F mark of
the gauge when the batteries are fully charged.
As the batteries discharge, the display will move
down near the E mark and flash. The batteries
should be recharged when the display gets to the
1/4 mark.
VOLTMETER
The voltmeter indicates the present state of
charge of the batteries. The needle should be in
the white zone when the batteries are fully
charged. As the batteries discharge, the needle
will move into the green zone. The batteries
should be recharged when the needle consistently
stays in the red zone.
NOTE: Do not charge the batteries more often
than is necessary. This will prolong the life of the
batteries. Do not allow the batteries to become
fully discharged as this will also damage the
batteries. See BATTERIES in the
MAINTENANCE section.