Tennant 186 User manual

186
MM159
Rev. 05 (12–95)
(Operator Manual)

This manual is furnished with each new TENNANT Model 186. 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; 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 supplied or equivalent parts.
Parts and supplies may be ordered by phone or mail from any TENNANT parts and service center, distributor, or
from any of the TENNANT 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 – MM159
Revision: 05
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, Minneapolis, Minnesota,
U.S.A.
Copyright 1990, 1991, 1992, 1994, 1995 TENNANT, Printed in U.S.A.

GENERAL INFORMATION
i
186 MM159 (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:
–Check For Fuel Leaks.
–Keep Sparks And Open Flame Away
From Refueling Area.
–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: Engine Emits Toxic Gases.
Severe Respiratory Damage Or
Asphyxiation Can Result. Provide Adequate
Ventilation. Consult With Your Regulatory
Agency For Exposure Limits. Keep Engine
Properly Tuned.
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
186 MM159 (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.
FOR SAFETY LABEL –LOCATED ON
THE TOP OF THE SOLUTION TANK. TOXIC GASES LABEL –LOCATED ON THE
LEFT SIDE PANEL.
BACK STRAIN LABEL –LOCATED ON THE
UNDERSIDE OF THE FILTER ASSEMBLY.
03132
FLAMMABLE MATERIALS LABEL –LOCATED
ON RIGHT SIDE PANEL.
FLAMMABLE MATERIALS LABEL –
LOCATED ON RIGHT SIDE PANEL.

GENERAL INFORMATION
iii
186 MM159 (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
AMMETER 2-8. . . . . . . . . . . . . . . . . . . . .
MAIN BRUSH LEVER 2-8. . . . . . . . . . . .
HOUR METER 2-8. . . . . . . . . . . . . . . . . .
START SWITCH 2-9. . . . . . . . . . . . . . . .
KEY-OPERATED ON-OFF SWITCH 2-9
ENGINE CHOKE KNOB 2-9. . . . . . . . . .
CIRCUIT BREAKERS AND FUSES 2-9
VACUUM SHUT-OFF KNOB 2-9. . . . . .
PARKING BRAKE LEVER 2-9. . . . . . . .
SQUEEGEE LEVER 2-10. . . . . . . . . . . . .
SOLUTION LEVER 2-10. . . . . . . . . . . . . .
SIDE BRUSH ARM 2-10. . . . . . . . . . . . . .
THERMO-SENTRY2-10. . . . . . . . . . . .
Page
MACHINE OPERATION 2-11. . . . . . . . . . . . .
NORMAL SWEEPING OPERATION 2-11
PRE-START CHECKLIST 2-11. . . . . .
TO START MACHINE 2-11. . . . . . . . .
TO SWEEP 2-12. . . . . . . . . . . . . . . . . .
TO DUMP HOPPER 2-12. . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE OPERATING 2-12. . . . . .
TO STOP MACHINE 2-12. . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE STOPPED 2-13. . . . . . . .
NORMAL SCRUBBING OPERATION 2-13
PRE-START CHECKLIST 2-13. . . . . .
TO START MACHINE 2-13. . . . . . . . .
TO SCRUB 2-14. . . . . . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK AND
EMPTY DEBRIS TRAY 2-15. . . . .
POST OPERATION CHECKLIST –
ENGINE OPERATING 2-15. . . . . .
TO STOP MACHINE 2-15. . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE STOPPED 2-16. . . . . . . .
DOUBLE SCRUBBING OPERATION 2-16
OPERATION ON GRADES 2-16. . . . . . .
VACUUM WAND OPTION 2-16. . . . . . . .
TO OPERATE VACUUM WAND 2-16
FILTER BYPASS OPTION 2-17. . . . . . . .
WATER PICKUP OPTION 2-17. . . . . . . .
TO OPERATE THE WATER PICKUP
OPTION 2-17. . . . . . . . . . . . . . . . . .
SCRUB ATTACHMENT 2-18. . . . . . . . . .
TO MOUNT SOLUTION TANK
AND DEBRIS TRAY 2-18. . . . . . . .
TO REMOVE SOLUTION TANK
AND DEBRIS TRAY 2-19. . . . . . . .
MACHINE TROUBLESHOOTING 2-21.
TRANSPORTING MACHINE 2-22. . . . . . . . .
MACHINE TIE-DOWNS 2-22. . . . . . . . . .
MACHINE STORAGE 2-23. . . . . . . . . . . . . . .
STORING MACHINE 2-23. . . . . . . . . . . .

GENERAL INFORMATION
186 MM159 (6–94)
iv
Page
MAINTENANCE 3-1. . . . . . . . . . . . . . . . . . . . . . .
RECOMMENDED FIRST 25-HOUR
MACHINE INSPECTION 3-3. . . . . . . . .
MAINTENANCE CHART 3-4. . . . . . . . . . . .
LUBRICATION 3-6. . . . . . . . . . . . . . . . . . . . .
ENGINE 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. . . . . . . . . . . . .
ENGINE 3-8. . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE LUBRICATION 3-8. . . . . . . . . .
COOLING SYSTEM 3-8. . . . . . . . . . . . .
AIR INTAKE SYSTEM 3-8. . . . . . . . . . .
AIR FILTER 3-8. . . . . . . . . . . . . . . . . .
TO CLEAN OR REPLACE
AIR FILTER ELEMENT 3-8. . . . .
FUEL SYSTEM –GASOLINE 3-9. . . . .
FUEL FILTER 3-9. . . . . . . . . . . . . . . .
CARBURETOR 3-9. . . . . . . . . . . . . . .
FUEL SYSTEM –LPG 3-9. . . . . . . . . . .
LPG FUEL SYSTEM 3-9. . . . . . . . . .
FUEL TANKS 3-10. . . . . . . . . . . . . . . .
TO CHANGE AN LPG FUEL
TANK 3-11. . . . . . . . . . . . . . . . . . . .
FUEL FILTER LOCK 3-12. . . . . . . . . .
REGULATOR 3-12. . . . . . . . . . . . . . . .
CARBURETOR 3-12. . . . . . . . . . . . . . .
LPG FUEL TROUBLESHOOTING 3-13
ELECTRICAL SYSTEM 3-13. . . . . . . . . .
SPARK PLUG 3-13. . . . . . . . . . . . . . . .
IGNITION SYSTEM 3-13. . . . . . . . . . .
STARTER 3-13. . . . . . . . . . . . . . . . . . .
CYLINDER HEAD 3-14. . . . . . . . . . . . . . .
VALVE TAPPET CLEARANCE 3-14.
PCV SYSTEM 3-14. . . . . . . . . . . . . . . . . .
TUNE-UP CHART 3-14. . . . . . . . . . . . . . .
ELECTRICAL SYSTEM 3-15. . . . . . . . . . . . .
BATTERY 3-15. . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL SCHEMATIC
(For machines below serial
number 004369) 3-16. . . . . . . . . . . . . .
ELECTRICAL SCHEMATIC
(For machines serial number
004369 and above) 3-17. . . . . . . . . . .
ELECTRICAL SCHEMATIC
(For machines serial number
004369 and above) 3-18. . . . . . . . . . .
Page
BELTS AND CHAINS 3-19. . . . . . . . . . . . . . .
PROPELLING BELTS 3-19. . . . . . . . . . . .
TO CHECK AND ADJUST
PROPELLING BELTS
TENSION 3-19. . . . . . . . . . . . . . . . .
TO REPLACE PROPELLING
BELTS 3-20. . . . . . . . . . . . . . . . . . .
SIDE BRUSH BELT 3-21. . . . . . . . . . . . . .
TO CHECK AND ADJUST
SIDE BRUSH BELT TENSION 3-21
TO REPLACE SIDE BRUSH
BELT 3-22. . . . . . . . . . . . . . . . . . . . .
SHORT MAIN BRUSH BELT 3-23. . . . . .
TO REPLACE SHORT MAIN
BRUSH BELT 3-23. . . . . . . . . . . . .
LONG MAIN BRUSH BELT 3-23. . . . . . .
TO REPLACE LONG MAIN
BRUSH BELT 3-23. . . . . . . . . . . . .
VACUUM FAN BELT 3-25. . . . . . . . . . . . .
TO CHECK AND ADJUST VACUUM
FAN BELT TENSION 3-25. . . . . . .
TO REPLACE VACUUM FAN
BELT 3-25. . . . . . . . . . . . . . . . . . . . .
WHEEL DRIVE CHAINS 3-26. . . . . . . . .
STATIC DRAG CHAIN 3-26. . . . . . . . . . .
BRUSHES 3-27. . . . . . . . . . . . . . . . . . . . . . . . .
MAIN BRUSH 3-27. . . . . . . . . . . . . . . . . . .
TO REMOVE MAIN BRUSH 3-27. . .
TO INSTALL MAIN BRUSH 3-27. . . .
TO CHECK AND ADJUST MAIN
BRUSH PATTERN 3-27. . . . . . . . .
SIDE BRUSH 3-28. . . . . . . . . . . . . . . . . . .
TO REMOVE SIDE BRUSH 3-28. . . .
TO INSTALL SIDE BRUSH 3-29. . . .
TO ADJUST SIDE BRUSH
PATTERN 3-29. . . . . . . . . . . . . . . . .
SKIRTS AND SEALS 3-30. . . . . . . . . . . . . . .
HOPPER LIP SKIRT 3-30. . . . . . . . . . . . .
REAR BRUSH SKIRTS 3-30. . . . . . . . . .
HOPPER TOP SEAL 3-30. . . . . . . . . . . . .
MAIN BRUSH COMPARTMENT
SKIRTS 3-30. . . . . . . . . . . . . . . . . . . . .
DEBRIS HOPPER AND DUST FILTER 3-31
DEBRIS HOPPER 3-31. . . . . . . . . . . . . . .
TO CHECK AND ADJUST
HOPPER FLOOR
CLEARANCE 3-31. . . . . . . . . . . . .
TO ADJUST DUST FILTER TO
HOPPER SEALING 3-32. . . . . . . .
DUST FILTER 3-32. . . . . . . . . . . . . . . . . . .
TO REMOVE DUST FILTER 3-33. . .
VACUUM WAND OPTION 3-34. . . . . . . . . . .
VACUUM WAND OPTION 3-34. . . . . . . .
TO REPLACE VACUUM WAND
BAG 3-34. . . . . . . . . . . . . . . . . . . . .

GENERAL INFORMATION
v
186 MM159 (6–94)
Page
WATER PICKUP OPTION 3-35. . . . . . . . . . .
WATER PICKUP OPTION 3-35. . . . . . . .
RECOVERY TANK 3-35. . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK 3-35.
REAR SQUEEGEE 3-36. . . . . . . . . . . . . .
TO REMOVE SQUEEGEE
ASSEMBLY 3-36. . . . . . . . . . . . . . .
TO INSTALL SQUEEGEE
ASSEMBLY 3-37. . . . . . . . . . . . . . .
TO REPLACE FRONT SQUEEGEE
BLADE 3-37. . . . . . . . . . . . . . . . . . .
TO REPLACE REAR SQUEEGEE
BLADE 3-38. . . . . . . . . . . . . . . . . . .
TO ADJUST SQUEEGEE 3-39. . . . . .
SCRUB ATTACHMENT 3-41. . . . . . . . . . . . .
SCRUB ATTACHMENT 3-41. . . . . . . . . .
SOLUTION TANK 3-41. . . . . . . . . . . . . . .
SOLUTION DISTRIBUTION
SYSTEM 3-41. . . . . . . . . . . . . . . . . . . .
DEBRIS TRAY 3-42. . . . . . . . . . . . . . . . . .
TO CHECK AND ADJUST DEBRIS
TRAY FLOOR CLEARANCE 3-42
SCRUB BRUSHES 3-42. . . . . . . . . . . . . .
RECOVERY TANK 3-43. . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK 3-43.
REAR SQUEEGEE 3-43. . . . . . . . . . . . . .
TO REMOVE SQUEEGEE
ASSEMBLY 3-43. . . . . . . . . . . . . . .
TO INSTALL SQUEEGEE
ASSEMBLY 3-44. . . . . . . . . . . . . . .
TO REPLACE FRONT SQUEEGEE
BLADE 3-44. . . . . . . . . . . . . . . . . . .
TO REPLACE REAR SQUEEGEE
BLADE 3-45. . . . . . . . . . . . . . . . . . .
TO ADJUST SQUEEGEE 3-47. . . . . .
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. . . . . . . . . . . . . . . . .
Page
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 –Engine, Sheaves and
Cover Group 6-6. . . . . . . . . . . . . .
Fig. 5 –Covers Group 6-8. . . . . . . . . . . . . . . . .
Fig. 6 –Handle and Battery Group 6-10. . . . .
Fig. 7 –Engine and Sheaves Group 6-12. . . .
Fig. 8 –Engine and Fuel Tank Group,
LPG 6-14. . . . . . . . . . . . . . . . . . . . .
Fig. 9 –Brush Drive Group 6-16. . . . . . . . . . . .
Fig. 10 –Wheel Drive Group 6-18. . . . . . . . . . .
Fig. 11 –Hopper Group 6-19. . . . . . . . . . . . . . .
Fig. 12 –Vacuum Fan Group 6-20. . . . . . . . . . .
Fig. 13 –Filter and Shaker Motor
Group 6-21. . . . . . . . . . . . . . . . . . .
Fig. 14 –Instrument Panel Group 6-22. . . . . . .
Fig. 15 –Instrument Panel Group 6-23. . . . . . .
Fig. 16 –Wire Harnesses Group,
Gasoline 6-24. . . . . . . . . . . . . . . . .
Fig. 17 –Wire Harnesses Group,
Gasoline 6-26. . . . . . . . . . . . . . . . .
Fig. 18 –Label Group 6-27. . . . . . . . . . . . . . . . .
Fig. 19 –Label Group 6-28. . . . . . . . . . . . . . . . .
OPTIONS 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fig. 1 –Solution Tank Group 7-2. . . . . . . . . . .
Fig. 2 –Recovery Tank Group 7-4. . . . . . . . . .
Fig. 3 –Rear Squeegee Lift Group 7-6. . . . . .
Fig. 4 –Rear Squeegee Group 7-8. . . . . . . . .
Fig. 5 –Side Scrub Brush Group 7-9. . . . . . . .
Fig. 6 –Vacuum Fan Deflector and
Hose Group 7-10. . . . . . . . . . . . . .
Fig. 7 –Vacuum Fan Shutoff Group 7-11. . . .
Fig. 8 –Recovery Tank Group,
Water Pickup 7-12. . . . . . . . . . . . .
Fig. 9 –Prep For Scrub and Wand Kit 7-14. .
Fig. 10 –Vacuum Wand Group 7-15. . . . . . . . .
Fig. 11 –Vacuum Wand Control Group 7-16. .
Fig. 12 –Vacuum Wand Group 7-17. . . . . . . . .
Fig. 13 –Vacuum Wand Control Group 7-18. .
Fig. 14 –Filter Bypass Kit 7-19. . . . . . . . . . . . .
Fig. 15 –Fine Particle Filter Kit 7-20. . . . . . . . .
Fig. 16 –Lift and Tie–Down Kit 7-21. . . . . . . . .
Fig. 17 –Lift and Tie–Down Kit 7-22. . . . . . . . .
Fig. 18 –Parking Brake Kit 7-23. . . . . . . . . . . .
Fig. 19 –Parking Brake Kit 7-24. . . . . . . . . . . .
Fig. 20 –Dual Caster Group 7-25. . . . . . . . . . .
Fig. 21 –Fire Extinguisher Kit 7-26. . . . . . . . . .
Fig. 22 –Fuel Tank Group, LPG 7-27. . . . . . . .
Fig. 23 –Double Wheel Kit 7-28. . . . . . . . . . . .
Fig. 24 –Plastic Hopper Kit 7-29. . . . . . . . . . . .

GENERAL INFORMATION
186 MM159 (6–94)
vi
Page
ENGINE PARTS, GASOLINE, LPG 8-1. . . . . . .
Fig. 1 –Crankcase Group 8-2. . . . . . . . . . . . . .
Fig. 2 –Camshaft and Valves Group 8-4. . . .
Fig. 3 –Air Intake Group 8-5. . . . . . . . . . . . . . .
Fig. 4 –Baffles and Shroud Group 8-6. . . . . .
Fig. 5 –Breather and Vent Group 8-7. . . . . . .
Fig. 6 –Flywheel Group 8-8. . . . . . . . . . . . . . .
Fig. 7 –Electric Start Group 8-9. . . . . . . . . . . .
Fig. 8 –Governor Group 8-10. . . . . . . . . . . . . .
Fig. 9 –Ignition Group 8-11. . . . . . . . . . . . . . . .
Fig. 10 –Carburetor Group, Gasoline 8-12. . .
Fig. 11 –Carburetor Group, Gasoline 8-13. . .
Fig. 12 –Fuel Pump Group 8-14. . . . . . . . . . . .
Fig. 13 –Fuel Tank Group 8-15. . . . . . . . . . . . .
Fig. 14 –Fuel Pump Group, LPG 8-16. . . . . . .
Fig. 15 –Carburetor Group, LPG 8-17. . . . . . .
CROSS REFERENCE 9-1. . . . . . . . . . . . . . . . . .
PART NUMBER TO PAGE NUMBER
CROSS REFERENCE LIST 9-2. . . . . . .

SPECIFICATIONS
1Ć1
186 MM159 (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
186 MM159 (6–94)
1Ć2

SPECIFICATIONS
1Ć3
186 MM159 (6–94)
MACHINE SPECIFICATIONS
POWER TYPE
Engine type –piston
Ignition –breakerless type spark
Cycle –4
Aspiration –natural
Cylinders –1
Bore –2.94 in (75 mm)
Stroke –2.75 in (70 mm)
Displacement –18.6 cu in (305 cc)
Net power governed –5.1 hp (3.8 kw)
@ 2000 rpm
Net power maximum –8 hp (6 kw) @ 3600 rpm
Fuel –gasoline, unleaded, 87 octane or LPG
Cooling system –air
Electrical system –12 V nominal, 15 A alternator
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 –
belt driven
SUSPENSION SYSTEM
Front –10 x 2.00 zero pressure tires (2)
Rear –5 x 1.5 caster (1)
SYSTEM FLUID CAPACITIES
Engine lubricating oil –1 qt (0.95 L)
Fuel tank –1.25 gal (4.75 L) gasoline
20 lb (9 kg) LPG
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) –33 in (840 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 –650 lb (295 kg)
GENERAL MACHINE PERFORMANCE
Maximum forward speed –3.2 mph (5.2 km/h)
Maximum reverse speed –3 mph (4.8 km/h)
Turning radius –65 in (1650 mm)

SPECIFICATIONS
186 MM159 (6–94)
1Ć4
MACHINE DIMENSIONS
SIDE VIEW
TOP VIEW
36 in
(915 mm)
58 in (1475 mm)
38 in
(965 mm)
03131
03138

OPERATION
2Ć1
186 MM159 (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. .
AMMETER 2-8. . . . . . . . . . . . . . . . . . . . . . . . .
MAIN BRUSH LEVER 2-8. . . . . . . . . . . . . . . .
HOUR METER 2-8. . . . . . . . . . . . . . . . . . . . . .
START SWITCH 2-9. . . . . . . . . . . . . . . . . . . .
KEY-OPERATED ON-OFF SWITCH 2-9. . .
ENGINE CHOKE KNOB 2-9. . . . . . . . . . . . . .
CIRCUIT BREAKERS AND FUSES 2-9. . . .
VACUUM SHUT-OFF KNOB 2-9. . . . . . . . . .
PARKING BRAKE LEVER 2-9. . . . . . . . . . . .
SQUEEGEE LEVER 2-10. . . . . . . . . . . . . . . . .
SOLUTION LEVER 2-10. . . . . . . . . . . . . . . . . .
SIDE BRUSH ARM 2-10. . . . . . . . . . . . . . . . . .
THERMO-SENTRY2-10. . . . . . . . . . . . . . . .
MACHINE OPERATION 2-11. . . . . . . . . . . . . . . . .
NORMAL SWEEPING OPERATION 2-11. . .
PRE-START CHECKLIST 2-11. . . . . . . . .
TO START MACHINE 2-11. . . . . . . . . . . . .
TO SWEEP 2-12. . . . . . . . . . . . . . . . . . . . . .
TO DUMP HOPPER 2-12. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE OPERATING 2-12. . . . . . . . . .
TO STOP MACHINE 2-12. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE STOPPED 2-13. . . . . . . . . . . .
NORMAL SCRUBBING OPERATION 2-13. .
PRE-START CHECKLIST 2-13. . . . . . . . .
TO START MACHINE 2-13. . . . . . . . . . . . .
TO SCRUB 2-14. . . . . . . . . . . . . . . . . . . . . .
TO DRAIN RECOVERY TANK AND
EMPTY DEBRIS TRAY 2-15. . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE OPERATING 2-15. . . . . . . . . .
TO STOP MACHINE 2-15. . . . . . . . . . . . . .
POST OPERATION CHECKLIST –
ENGINE STOPPED 2-16. . . . . . . . . . . .
Page
DOUBLE SCRUBBING OPERATION 2-16. .
OPERATION ON GRADES 2-16. . . . . . . . . . .
VACUUM WAND OPTION 2-16. . . . . . . . . . . .
TO OPERATE VACUUM WAND 2-16. . . .
FILTER BYPASS OPTION 2-17. . . . . . . . . . . .
WATER PICKUP OPTION 2-17. . . . . . . . . . . .
TO OPERATE THE WATER
PICKUP OPTION 2-17. . . . . . . . . . . . . .
SCRUB ATTACHMENT 2-18. . . . . . . . . . . . . .
TO MOUNT SOLUTION TANK
AND DEBRIS TRAY 2-18. . . . . . . . . . .
TO REMOVE SOLUTION TANK
AND DEBRIS TRAY 2-19. . . . . . . . . . .
MACHINE TROUBLESHOOTING 2-21. . . . .
TRANSPORTING MACHINE 2-23. . . . . . . . . . . .
MACHINE TIE-DOWNS 2-23. . . . . . . . . . . . . .
MACHINE STORAGE 2-24. . . . . . . . . . . . . . . . . .
STORING MACHINE 2-24. . . . . . . . . . . . . . . .

OPERATION
186 MM159 (6–94)
2Ć2

OPERATION
2Ć3
186 MM159 (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 engine oil level. See ENGINE in
the MAINTENANCE section.
4. Check the main brush adjustment. See
BRUSHES in the MAINTENANCE section.
5. Fill the fuel tank, or install an LPG fuel tank
on the machine.
FOR SAFETY: When Servicing Machine, Keep
Flames And Sparks Away From Fuel System
Service Area. Keep Area Well Ventilated.

OPERATION
186 MM159 (6–94)
2Ć4
OPERATION OF CONTROLS
C
D
E
F
G
H
I
J
A
K
L
M
O
Q
N
B
03132
03146
MACHINE COMPONENTS
A. Clutch Handle J. Inspection Door
B. Stationary Handle K. Solution Lever
C. Battery 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. Engine Access Cover Q. Parking Brake Lever
I. Instrument Panel

OPERATION
2Ć5
186 MM159 (6–94)
INSTRUMENT PANEL SYMBOLS
The symbols are used to identify controls and
displays on the machine:
Filter Shaker
Main Brush Free-Float
Main Brush Down
Main Brush Up
Vacuum Shut-Off
Circuit Breaker No. 1
Circuit Breaker No. 2
Choke
Engine Start
Key Switch
Parking Brake
Side Brush

OPERATION
186 MM159 (6–94)
2Ć6
A
B
D
C
E
F
G
H
I
J
K
L
03133
CONTROLS AND INSTRUMENTS
(For machines below serial number 006000)
A. Stationary Handle G. Start Switch
B. Filter Shaker Switch H. Clutch Handle
C. Filter Shaker By-pass Switch I. Key-Operated On-Off Switch
D. Ammeter J. Engine Choke Knob
E. Main Brush Lever K. Circuit Breakers
F. Hour Meter L. Vacuum Shut-Off Knob

OPERATION
2Ć7
186 MM159 (6–94)
A
B
C
D
E
F
G
I
J
K
L
H
K
06439
CONTROLS AND INSTRUMENTS
(For machines serial number 006000 and above)
A. Stationary Handle G. Clutch Handle
B. Filter Shaker By-Pass Switch H. Clutch Reverse Handle
C. Ammeter I. Key-Operated On-Off Switch
D. Main Brush Lever J. Engine Choke Knob
E. Hour Meter K. Circuit Breakers
F. Start Switch L. Vacuum Shut-Off Knob

OPERATION
186 MM159 (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.
AMMETER
The ammeter registers the charging current which
is being passed to the battery by the alternator. It
also registers a discharge of current being used
by the machine when the alternator is not
charging.
MAIN BRUSH LEVER
The main brush lever controls the position of the
main brush. To raise the main brush, pull the lever
up, to the right and back into the (Main
Brush Up) position (lower groove). To lower the
main brush on smooth surfaces, push the lever
forward and pull it back into the (Main Brush
Down) position (top groove). To lower the main
brush on uneven surfaces, push the lever forward,
to the left, and release it into the (Main
Brush Free-Float) position.
When parking the machine, always raise the
brush to prevent the bristles from taking a set.
To increase main brush contact with the floor, turn
the main brush lever to the left. To decrease main
brush contact with the floor, turn the lever to the
right.
C
D
E
B
A
03134
MAIN BRUSH LEVER
A. Main Brush Lever
B. Instrument Panel
C. (Main Brush Up) Position
D. (Main Brush Down) Position
E. (Main Brush Free-Float) Position
HOUR METER
The hour meter records the number of hours the
machine has operated. This information is useful
in determining when to service the machine.