Tennant 550 User manual

550
www.tennantco.com
MP148EN
Rev. 32 (03-2011)
Rider Scrubber
English EN
Operator Manual
(Gas/LPG/Diesel)
*MP148EN*
TennantTruetParts and Supplies

This manual is furnished with each new model. It provides necessary operation and maintenance instructions.
Read this manual completely and understand
the machine before operating or servicing it.
This machine will provide excellent service. However, the best results will be obtained at minimum costs if:
SThe machine is operated with reasonable care.
SThe machine is maintained regularly - per the machine maintenance instructions provided.
SThe machine is maintained with manufacturer supplied or equivalent parts.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials,
old machine components such as
batteries, hazardous fluids imcluding
antifreeze and oil, in an environmentally
safe way according to local waste
disposal regulations.
Always remember to recycle.
MACHINE DATA
Please fill out at time of installation for future reference.
Model No. --
Serial No. --
Machine Options --
Sales Rep. --
Sales Rep. phone no. --
Customer Number --
Installation Date --
Tennant N.V.
Industrielaan 6 5405 AB
P.O. Box 6 5400 AA Uden--The Netherlands
[e-mail]
www.tennantco.com
Specifications and parts are subject to change without notice.
Oriiginal instuctions, Copyright E1997--1999, 2001, 2002, 2005, 2006, 2008, 2011 TENNANT Company, Printed in The Netherlands
DECLARATION OF CONFORMITY FOR MACHINERY
(according to Annex II A of the Machinery Directive)
TENNANT N.V.
Industrielaan 6 5405 AB
P.O. Box 6 5400 AA
Uden -- The Netherlands
Uden, 21--05--2010
EN
Herewith declares, on our own responsibility, that the machinery
550
-- is in conformity with the provisions of the Machinery Directive (2006/42/EC), as amended and with national
implementing legislation
-- is in conformity with the provisions of the Electro Magnetic Compatibility Directive 2004/108/EC
and that
-- the following harmonized standards or parts of these standards have been applied: EN ISO 14121--1, EN
1037, EN 60335--1, EN 60204--1, EN ISO 13849--1, EN ISO 13849--2, EN 60529, EN ISO 4413, EN 349, EN
55012, EN 61000--6--2, EN ISO 11201, EN ISO 4871, EN ISO 3744*, EN ISO 13059*, EN ISO 3450, EN
60335--2--72.
-- the following national standards or parts of these standards have been used:

GENERAL INFORMATION
1
550 MP148EN (3--11)
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.
CAUTION: To warn of unsafe practices that
could result in minor or moderate personal
injury.
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.
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: Machine Can Emit Excessive
Noise. Consult With Your Regulatory
Agency For Exposure Limits. Hearing Loss
Can Result. Wear Hearing Protection.
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.
WARNING: Moving Belt. Keep Away.
WARNING: Moving Fan Blades. Keep Away.
WARNING: Raised Scrub Head May Fall.
Block Scrub Head Up.
WARNING: Crush Hazard Between Front
And Rear Halves Of Machine. Engage Pivot
Lock.
WARNING: Heavy LP Tank May Fall.
Remove LP Tank Before Opening Cover.
WARNING: Strong Vacuum. Keep Away
From Fan Inlet When Fan Is Running.
CAUTION: LPG engine will run for a few
seconds after key is turned off. Apply
parking brake before leaving machine.
FOR SAFETY:
1. Do Not Operate Machine:
-- Unless Trained And Authorized.
-- Unless Operation Manual Is Read And
Understood.
-- Unless mentally and physically capable of
following machine instructions.
-- In Flammable Or Explosive Areas Unless
Designed For Use In Those Areas.
-- In Areas With Possible Falling Objects
Unless Equipped With Overhead Guard.
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 Starting Machine:
-- Keep Foot On Brake And Directional Pedal
In Neutral.
4. When Using Machine:
-- Use Brakes To Stop Machine.
-- Go Slow On Grades And Slippery
Surfaces.
-- Use Care When Backing Machine.
-- Do Not Carry Riders On Machine.
-- Always Follow Safety And Traffic Rules.
-- Report Machine Damage of Faulty
Operation Immediately.
-- Follow mixing, handling and disposal
instructions on chemical containers.
-- Follow safety guidelines concerning wet
floors.
5. Before Leaving Or Servicing Machine:
-- Stop On Level Surface.
-- Set Parking Brake.
-- Turn Off Machine And Remove Key.

GENERAL INFORMATION
550 MP148EN (8--02)
2
6. When Servicing Machine:
-- Avoid Moving Parts. Do Not Wear Loose
Jackets, Shirts, Or Sleeves.
-- Block Machine Tires Before Jacking
Machine Up.
-- Jack Machine Up At Designated Locations
Only. Block Machine Up With Jack Stands.
-- Use Hoist Or Jack That Will Support The
Weight Of The Machine.
-- Wear Eye And Ear Protection When Using
Pressurized Air Or Water.
-- Disconnect Battery Connections Before
Working On Machine.
-- Avoid Contact With Battery Acid.
-- Avoid Contact With Hot Engine Coolant.
-- Allow Engine To Cool.
-- Keep Flames And Sparks Away From Fuel
System Service Area. Keep Area Well
Ventilated.
-- Use Cardboard To Locate Leaking
Hydraulic Fluid Under Pressure.
-- Use TENNANT Supplied Or Approved
Replacement Parts.
7. When loading/unloading machine onto/off
truck or trailer:
-- Turn off machine.
-- Use truck or trailer that will support the
weight of the machine.
-- Use winch. Do not drive the machine
onto/off the truck or trailer unless the load
height is 380 mm (15 in) or less from the
ground.
-- Set parking brake after machine is loaded.
-- Block machine tires.
-- Tie machine down to truck or trailer.
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.
TRAVEL SPEED CAUTION DECAL --
LOCATED ON THE SIDE OPERATOR
PANEL
SCRUB HEAD LOCK WARNING DECAL
-- LOCATED ON THE SCRUB HEAD
FAN SUCTION DANGER DECAL --
LOCATED ON THE SOLUTION TANK
00291
LPG ENGINE WILL RUN LABEL -- LOCATED
NEXT TO THE IGNITION SWITCH ON THE
INSTRUMENT PANEL.

GENERAL INFORMATION
3
550 MP148EN (12--01)
00291
03788
PINCH SPACE DANGER DECAL --
LOCATED ON THE SOLUTION TANK
ENGINE FAN WARNING DECAL -- LOCATED
ON THE LEFT SIDE TOP ACCESS DOOR LIP
FLAMMABLE MATERIALS WARNING DECAL --
LOCATED IN THE OPERATOR COMPARTMENT
FLAMMABLE MATERIALS WARNING DECAL --
LOCATED ON THE SOLUTION TANKS
03784
ENGINE FAN WARNING DECAL --
LOCATED ON THE FAN SHROUD

GENERAL INFORMATION
550 MP148EN (3--05)
4
CONTENTS
Page
SAFETY PRECAUTIONS 1................
MACHINE SPECIFICATIONS 8.............
POWER TYPE 8.......................
GAS/LP CONTINENTAL F163 ENGINES --
(For machines serial number
003370--003933) 8.............
GAS/LP CONTINENTAL TM27 ENGINES --
(For machines below serial number
006409) 8....................
GAS/LP GM ENGINES -- (For machines
serial number 006409 and above) 8..
DIESEL CONTINENTAL TMD27
ENGINES -- (For machines below serial
number 006409) 8.............
DIESEL PERKINS ENGINES -- (For
machines serial number 006409 --
007002) 8....................
DIESEL CAT ENGINES -- (For machines
serial number 007003 and above) 8..
POWER TRAIN 9......................
STEERING 9..........................
BRAKING SYSTEM 9..................
SUSPENSION SYSTEM 9..............
SYSTEM FLUID CAPACITIES 9.........
CONTINENTAL ENGINES (For machines
below serial number 006409) 9.....
GAS/LP GM ENGINES (For machines
serial number 006409 -- 007005) 9...
GAS/LPG GM ENGINES (For machines
serial number 007006 and above) 9..
DIESEL PERKINS ENGINES (For
machines serial number 006409 --
007002) 9....................
DIESEL CAT ENGINES (For machines
serial number 007003 and above) 9..
GENERAL MACHINE
DIMENSIONS/CAPACITIES 10.......
MACHINE WEIGHTS 10................
GENERAL MACHINE PERFORMANCE 10.
MACHINE DIMENSIONS 11..............
PREPARATION FOR OPERATION 12.......
AFTER UNLOADING AND BEFORE
OPERATING THE MACHINE: 12......
OPERATION OF CONTROLS 13...........
MACHINE COMPONENTS 13...........
INSTRUMENTS AND CONTROLS -- GAS/LPG
and DIESEL ENGINES (For machines
below serial number 007003) 14....
INSTRUMENTS AND CONTROLS -- GAS/LPG
GM ENGINES (For machines serial
number 007006 and above) 15.....
INSTRUMENTS AND CONTROLS -- DIESEL
CAT ENGINES (For machines serial
number 007003 and above) 16.....
BRAKE PEDAL 17.....................
DIRECTIONAL PEDAL 17...............
OPERATOR SEAT 17...................
SCRUB HEAD LOCK LEVER 17.........
PIVOT LOCK PIN 18...................
PARKING BRAKE LEVER 18............
Page
AMMETER (For machines below serial
number 007003) 18..................
CHARGING SYSTEM LIGHT (For machines
serial number 007003 and above) 18...
SQUEEGEE POSITION LAMP (For machines
below serial number 007003) 18.......
CHECK ENGINE LIGHT (For machines serial
number 007006 and above) 18........
IGNITION SWITCH 18..................
DIESEL PRE-HEAT INDICATING LAMP 19.
OPERATING LIGHTS SWITCH (OPTION)19
ROTATING LIGHT SWITCH (OPTION) 19..
HAZARD LIGHT SWITCH (OPTION) 19...
FUEL LEVEL GAUGE 19................
PANEL LAMP (OPTION) 19.............
TANK DRAIN LAMP (OPTION) 19........
SCRUB BRUSH PRESSURE LAMP
(OPTION) 19.......................
ENGINE HOUR METER 19..............
FUSES (For machines below serial
number 007003) 19..................
FUSES (For machines serial number
007003 and above) 19...............
GAS/LPG GM ENGINES 19.............
DIESEL CAT ENGINES 19..............
CIRCUIT BREAKERS (For machines serial
number 007003 and above) 20........
ENGINE OIL PRESSURE GAUGE -- DIESEL,
GAS/LPG CONTINENTAL ENGINES (For
machines below serial
number 006409) 20............
ENGINE OIL PRESSURE GAUGE -- GAS/LPG
GM ENGINES (For machines serial number
006409 -- 007002) 20..............
ENGINE OIL PRESSURE GAUGE -- DIESEL
PERKINS ENGINES (For machines serial
number 006409 -- 007002) 20......
ENGINE OIL PRESSURE LIGHT -- GAS/LPG
GM ENGINES (For machines serial
number 007003 and above) 20.....
ENGINE OIL PRESSURE LIGHT -- DIESEL
CAT ENGINES (For machines serial
number 007003 and above) 20.....
ENGINE COOLANT TEMPERATURE
GAUGE 20.........................
SQUEEGEE SWITCH 21................
SCRUB BRUSH LEVER 21..............
SCRUB HEAD POSITION LEVER 21.....
SRS LIQUID LOW LEVEL LAMPS
(OPTION) 21.......................
SRS CLEANING SOLUTION FLOW
KNOB (OPTION) 21....................
SOLUTION LEVER 21..................
ENGINE CHOKE KNOB -- CONTINENTAL
ENGINES 21.......................
THROTTLE LEVER -- DIESEL, GAS/LPG
CONTINENTAL ENGINES (For machines
serial number 003370 -- 006408) 22..

GENERAL INFORMATION
5
550 MP148EN (3--05)
Page
THROTTLE LEVER -- DIESEL CAT ENGINES
(For machines serial number 007003
and above) 22....................
THROTTLE SWITCH -- DIESEL PERKINS
ENGINES (For machines serial number
006409 -- 007002) 22..............
THROTTLE SWITCH -- GAS/LPG GM
ENGINES (For machines serial number
007003 and above) 22.............
STEERING WHEEL 22.................
HORN BUTTON (For machines serial number
007003 and above) 22...............
MACHINE OPERATION 23.................
NORMAL SCRUBBING OPERATION 23..
PRE-START CHECKLIST 23..........
TO START MACHINE 23.............
TO FILL SOLUTION TANK 24.........
TO SCRUB 24......................
TO DRAIN AND CLEAN RECOVERY
TANK AND EMPTY HOPPER 25...
POST OPERATION CHECKLIST --
ENGINE OPERATING 26..........
TO STOP MACHINE 26..............
POST OPERATION CHECKLIST --
ENGINE STOPPED 26............
DOUBLE SCRUBBING OPERATION 26..
OPERATION ON GRADES 26...........
MACHINE TROUBLESHOOTING 27.....
OPTIONS OPERATION 28.................
HIGH PRESSURE SPRAYER 28.........
TO OPERATE HIGH PRESSURE
SPRAYER 28....................
VACUUM WAND 28....................
TO OPERATE VACUUM WAND 28....
TOWING AND TRANSPORTING THE
MACHINE 29..........................
TOWING THE MACHINE 29..........
TRANSPORTING THE MACHINE 29..
MACHINE JACKING LOCATIONS 31.....
MACHINE STORAGE 32...................
STORING MACHINE 32................
GASOLINE POWERED
MACHINES 32...................
DIESEL POWERED MACHINES 33...
RECOMMENDED FIRST 50-HOUR MACHINE
INSPECTION 35.......................
MAINTENANCE CHART 36................
LUBRICATION 38.........................
ENGINE 38............................
GASOLINE AND LPG POWERED
ENGINES 38.....................
DIESEL POWERED ENGINES 38.....
VACUUM FAN SHAFT -- Gas/LPG ENGINES
(For machines below serial number
007003) 38......................
VACUUM FAN SHAFT -- DIESEL ENGINES
(For machines serial number 003370
and above) 38....................
MACHINE PIVOT 39...................
SCRUB HEAD PIVOT 39
................
SCRUB HEAD HINGES 40..............
REAR SQUEEGEE CASTERS 40........
SCRUB BRUSH IDLER PLUGS 40.......
REAR WHEELS 40.....................
Page
HYDRAULICS 41.........................
HYDRAULIC FLUID 41.................
HYDRAULIC FLUID RESERVOIR 41.....
TO DRAIN THE HYDRAULIC FLUID
RESERVOIR 42..................
TO FILL THE HYDRAULIC FLUID
RESERVOIR 42..................
HYDRAULIC FLUID RESERVOIR
BREATHER 43......................
HYDRAULIC FLUID FILTER 43..........
TO REPLACE THE HYDRAULIC FLUID
FILTER ELEMENT 43.............
HYDRAULIC FLUID LEAKS 43..........
HYDRAULIC COMPONENTS
TROUBLESHOOTING 44............
ENGINE 45..............................
LUBRICATION 45......................
GASOLINE AND LPG POWERED
ENGINES 45.....................
DIESEL POWERED ENGINES 45.....
COOLING SYSTEM 45.................
AIR INTAKE SYSTEM 46...............
AIR FILTER SERVICE INDICATOR 46..
AIR FILTER 46......................
TO REPLACE AIR FILTER ELEMENT --
CONTINENTAL ENGINES (For
machines below serial number
006409) 47.................
TO REPLACE AIR FILTER ELEMENT --
GM GAS AND PERKINS OR CAT
DIESEL ENGINES (For machines
serial number 006409 and
above) 47..................
FUEL SYSTEM -- GASOLINE
--CONTINENTAL ENGINES (For machines
below serial number 006409) 48....
FUEL FILTER 48....................
CARBURETOR 48...................
FUEL SYSTEM -- GASOLINE -- GM ENGINES
(For machines serial number 006409
and above) 49....................
FUEL FILTER 49....................
IN--LINE FUEL FILTER 49............
ELECTRONIC FUEL INJECTION --
GM ENGINES 49.................
FUEL SYSTEM -- LPG 49...............
LPG FUEL SYSTEM 49..............
IN--LINE FUEL FILTER --GM ENGINES
(For machines serial number 006409
and above) 50.................
FUEL TANKS 50....................
TO CHANGE AN LPG FUEL TANK 51
FUEL FILTER LOCK 52..............
VAPORIZER-REGULATOR 52........
CARBURETOR -- CONTINENTAL
ENGINES (For machines below serial
number 006409) 52............
ELECTRONIC FUEL INJECTION
SYSTEM -- GM ENGINES (For
machines serial number 006409
and above) 52..............
OIL PRESSURE SWITCH 52.........
LPG FUEL TROUBLESHOOTING 53..

GENERAL INFORMATION
550 MP148EN (3--05)
6
Page
FUEL SYSTEM -- DIESEL 54............
FUEL WATER TRAP 54..............
TO CLEAN WATER TRAP 54......
FUEL FILTER 54....................
TO REPLACE FUEL FILTER --
CONTINENTAL ENGINES (For
machines between serial number
003370--005001) 54.........
TO REPLACE FUEL FILTER --
CONTINENTAL ENGINES (For
machines serial number
005002--006408) 55.........
TO REPLACE FUEL FILTER --
PERKINS ENGINES (For machines
serial number 006409 --
007002) 55.................
WATER SEPARATOR/FUEL FILTER --
CAT ENGINES (For machines serial
number 007003 and above) 56..
IN--LINE FUEL FILTER -- PERKINS
ENGINES (For machines serial number
006409 -- 007002) 56...........
FUEL INJECTION PUMP 56..........
FUEL INJECTORS 56...............
PRIMING THE FUEL SYSTEM --
CONTINENTAL ENGINES (For
machines serial number 003370 --
005001) 57.................
PRIMING THE FUEL SYSTEM --
CONTINENTAL ENGINES (For
machines serial number
005002--006408) 58.........
PRIMING THE FUEL SYSTEM --
PERKINS ENGINES (For machines
serial number 006409 -- 007002) 58
GOVERNOR -- GAS/LP CONTINENTAL
F163 ENGINES (For machines serial
number 003370--003933) 59.....
TO ADJUST GOVERNOR, F163 59..
GOVERNOR -- GAS/LP CONTINENTAL
TM27 ENGINES (For machines serial
number 003934--006408) 60.....
TO ADJUST GOVERNOR, TM27 60.
GOVERNOR -- GAS/LP GM ENGINES (For
machines serial number 006409
and above) 61.................
ELECTRICAL SYSTEM 61..............
SPARK PLUGS 61..................
DISTRIBUTOR 61...................
DISTRIBUTOR IGNITION TIMING 62...
CYLINDER HEAD -- GASOLINE, LPG 63...
CYLINDER HEAD BOLT TIGHTENING --
CONTINENTAL F163 ENGINE (For
machines serial number
003370--003933) 63.........
CYLINDER HEAD BOLT TIGHTENING --
CONTINENTAL TM27 ENGINES (For
machines between serial number
003934--006408) 63.........
CYLINDER HEAD BOLT TIGHTENING --
GM ENGINES (For machines serial
number 006409 and above) 63..
Page
CYLINDER HEAD -- DIESEL 64..........
CYLINDER HEAD BOLT TIGHTENING --
CONTINENTAL ENGINES (For
machines below serial number
006409) 64.................
CYLINDER HEAD BOLT TIGHTENING --
PERKINS ENGINES (For machines
serial number 006409 -- 007002) 64
VALVE TAPPET CLEARANCE --
CONTINENTAL F163 ENGINES (For
machines serial number
003370--003933) 65............
VALVE TAPPET CLEARANCE --
CONTINENTAL TM27 ENGINES (For
machines serial number
003934--006408) 65............
PCV SYSTEM 66......................
TUNE-UP CHART -- GASOLINE, LPG
CONTINENTAL F163 ENGINES (For
machines serial number
003370--003933) 66............
TUNE-UP CHART -- GASOLINE, LPG
CONTINENTAL TM27 ENGINES (For
machines serial number
003934--006408) 66............
TUNE-UP CHART -- GASOLINE, LPG
GM ENGINES (For machines serial
number 006409 and above) 66.....
ELECTRICAL SYSTEM 67.................
BATTERY 67...........................
BELTS AND CHAINS 68...................
VACUUM FAN DRIVE BELT -- Gas/LPG
ENGINES (For machines serial number
003370 -- 004110) 68..............
TO ADJUST VACUUM FAN DRIVE
BELT 68.........................
VACUUM FAN DRIVE BELT -- Gas/LPG
ENGINES (For machines below serial
number 007003) 68...............
VACUUM FAN DRIVE BELT -- DIESEL
ENGINES (For machines serial number
004111 and above) 68.............
INTERMEDIATE DRIVE BELT (For machines
serial number 003370 -- 004110) 69....
TO ADJUST INTERMEDIATE DRIVE
BELT 69.........................
ALTERNATOR AND RADIATOR FAN BELT
TO ADJUST ALTERNATOR AND
RADIATOR FAN BELT 69..........
SCRUB HEAD 70.........................
SCRUB HEAD 70......................
TO ADJUST SCRUB HEAD HEIGHT 70.
TO ADJUST SCRUB BRUSH
PATTERN 70.....................
SCRUB BRUSHES 72..................
TO REPLACE SCRUB BRUSHES 72..

GENERAL INFORMATION
7
550 MP148EN (3--05)
Page
SOLUTION SYSTEM 73...................
RECOVERY TANK 73..................
WATER SPRAY DEFLECTOR 73........
SRS WATER SPRAY DEFLECTOR 74....
SRS SOLUTION TANK 75...............
SOLUTION DISPENSING TUBE 76......
SRS CLEANING SOLUTION FILTER 76
SRS METERING SOLUTION PUMP 76
TROUBLESHOOTING 76...............
SQUEEGEES 77..........................
SIDE SQUEEGEES 77.................
REAR SQUEEGEE 77..................
TO REPLACE REAR SQUEEGEE
BLADES 78......................
TO FACTORY ADJUST REAR
SQUEEGEE 78..................
TO ADJUST REAR SQUEEGEE 82...
BRAKES AND TIRES 83...................
SERVICE BRAKES 83..................
PARKING BRAKES 83..................
TIRES 83.............................
OPTIONS 84.............................
HIGH PRESSURE SPRAYER 84.........

SPECIFICATIONS
550 MP148EN (9--08)
8
MACHINE SPECIFICATIONS
POWER TYPE
GAS/LP CONTINENTAL F163 ENGINES -- (For
machines serial number 003370--003933)
Engine manufacturer/model -- Continental F163
Engine type -- piston
Ignition -- breaker type spark
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 3.44 (85 mm)
Stroke -- 4.38 (110 mm)
Displacement -- 162 cu in (2.7 L)
Net power -- 59 hp (45 kw) @ 2400 rpm governed
63 hp (50 kw) @ 2800 rpm maximum
Fuels -- gasoline, 86 octane, or LPG
Cooling system -- water
Electrical system -- 12 V nominal, 35 A alternator
GAS/LP CONTINENTAL TM27 ENGINES -- (For
machines below serial number 006409)
Engine manufacturer/model -- Continental TM27
Engine type -- piston
Ignition -- breaker--less type spark
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 3.58 in (90 mm)
Stroke -- 4.06 in (105 mm)
Displacement -- 164 cu in (2.7 L)
Net power -- 58 hp (43 kw) @ 2400 rpm governed
70 hp (52 kw) @ 3000 rpm maximum
Fuels -- gasoline, 85 octane unleaded, or LPG
Cooling system -- water
Electrical system -- 12 V nominal, 42 A alternator
GAS/LP GM ENGINES -- (For machines serial
number 006409 and above)
Engine manufacturer/model -- GM Powertrain
Engine type -- piston
Ignition -- solid state distributor
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 4.00 in (101.60 mm)
Stroke -- 3.60 in (91.44 mm)
Displacement -- 181 cu in (3.0 L)
Net power: Gasoline
NA hp ( kw) @ 2400 rpm governed
83 hp (62 kw) @ 3000 rpm maximum
Net power: LPG
65 hp (49 kw) @ 2400 rpm governed
NA hp ( kw) @ NA rpm maximum
Fuels -- gasoline, 85 octane unleaded, or LPG
Cooling system -- water
Electrical system -- 12 V nominal, 50 A alternator
DIESEL CONTINENTAL TMD27 ENGINES -- (For
machines below serial number 006409)
Engine manufacturer/model -- Continental TMD27
Engine type -- piston
Ignition -- diesel
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 3.58 in (90 mm)
Stroke -- 4.06 in (105 mm)
Displacement -- 164 cu in (2.7 L)
Net power -- 55 hp (40 kw) @ 2400 rpm governed
66 hp (50 kw) @ 3000 rpm maximum
Fuels -- #1 or #2 diesel fuel
Cooling system -- water
Electrical system -- 12 V nominal, 42 A alternator
DIESEL PERKINS ENGINES -- (For machines
serial number 006409 -- 007002)
Engine manufacturer/model -- Perkins 704--30 Series
Engine type -- piston
Ignition -- solid state distributor
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 3.80 in (97.00 mm)
Stroke -- 3.90 in (100.00 mm)
Displacement -- 181 cu in (3.0 L)
Net power: -- 63 hp (44.8 kw) @ 2400 rpm governed
63 hp (47 kw) @ 2400 rpm maximum
Fuels -- Diesel
Cooling system -- water/ethylene glycol antifreeze
Electrical system -- 12 V nominal, 50 A alternator
(std), 100 A alternator (HD)
DIESEL CAT ENGINES -- (For machines serial
number 007003 and above)
Engine manufacturer/model -- CAT 3044C
Engine manufacturer/model -- CAT C3.4
Engine type -- piston
Ignition -- solid state distributor
Cycle -- 4
Aspiration -- natural
Cylinders -- 4
Bore -- 3.70 in (94.00 mm)
Stroke -- 4.70 in (120.00 mm)
Displacement -- 201 cu in (3.33 L)
Net power: -- 62 hp (46.2 kw) @ 2400 rpm governed
63 hp (47 kw) @ 2600 rpm maximum
Fuels -- Diesel
Cooling system -- water/ethylene glycol antifreeze
Electrical system -- 12 V nominal, 75 A alternator
(std), 100 A alternator (HD)

SPECIFICATIONS
9
550 MP148EN (2--06)
POWER TRAIN
Propelling -- hydraulic drive motors (2)
Scrub brush -- hydraulic drive motors (2)
Vacuum fan -- belt driven
STEERING
Type -- articulated frame
Power source -- double action hydraulic cylinder
Emergency steering -- manual
BRAKING SYSTEM
Service brakes -- hydraulic caliper disc brakes (2),
(one per front wheel) foot brake master cylinder
actuated.
Parking brakes -- mechanical caliper disc brakes (2),
(one per front wheel), cable actuated.
SUSPENSION SYSTEM
Front -- two 8.00 x 16.5 6-ply rating tubeless tires
Rear -- two 8.00 x 16.5 6-ply rating tubeless tires
SYSTEM FLUID CAPACITIES
Standard solution tank -- 140 gal (530 L)
Standard recovery tank -- 120 gal (455 L)
SRS solution tank -- 265 gal (1000 L)
SRS cleaning solution tank -- 10 gal (37 L)
Fuel tank, gasoline, diesel -- 15.3 gal (60 L)
Fuel tank, LPG -- 33 lb (15 kg)
CONTINENTAL ENGINES (For machines below
serial number 006409)
Hydraulic system, reservoir -- 11.5 gal (45 L)
Hydraulic system, total system -- 13.8 gal (52 L)
Engine cooling system:
radiator -- 6.4 qt (6 L)
total system -- 13.4 qt (13 L)
Engine lubricating oil, gasoline, LPG -- 4.5 qt (4 L)
Engine lubricating oil, diesel -- 7 qt (6.5 L)
GAS/LP GM ENGINES (For machines serial
number 006409 -- 007005)
Hydraulic system, reservoir -- 11.5 gal (45 L)
Hydraulic system, total system -- 13.8 gal (52 L)
Engine cooling system:
radiator/hoses -- 8.75 qt (8 L)
total system -- 12.75 qt (12 L)
Engine lubricating oil with filter -- 5.0 qt (4.7 L)
GAS/LPG GM ENGINES (For machines serial
number 007006 and above)
Hydraulic system, reservoir -- 14.2 gal (54 L)
Hydraulic system, total system -- 18.3 gal (69 L)
Engine cooling system:
radiator/hoses -- 8.75 qt (8 L)
total system -- 12.75 qt (12 L)
Engine lubricating oil with filter -- 5.0 qt (4.7 L)
DIESEL PERKINS ENGINES (For machines serial
number 006409 -- 007002)
Hydraulic system, reservoir -- 11.5 gal (45 L)
Hydraulic system, total system -- 13.8 gal (52 L)
Engine cooling system:
radiator/hoses -- 8.75 qt (8 L)
total system -- 12.75 qt (12 L)
Engine lubricating oil with filter -- 11 qt (10.4 L)
DIESEL CAT ENGINES (For machines serial
number 007003 and above)
Hydraulic system, reservoir -- 11.5 gal (45 L)
Hydraulic system, total system -- 13.8 gal (52 L)
Engine cooling system:
radiator/hoses -- 8.75 qt (8 L)
total system -- 12.75 qt (12 L)
Engine lubricating oil with filter -- 10.6 qt (10. L)

SPECIFICATIONS
550 MP148EN (2--06)
10
GENERAL MACHINE DIMENSIONS/CAPACITIES
Length -- 156 in (3960 mm)
Width -- 61 in (1550 mm)
Height -- 61 in (1550 mm)
Height with overhead guard -- 84 in (2130 mm)
Track, front -- 46.7 in (1185 mm)
Track, rear -- 45.3 in (1150 mm)
Wheel base -- 58.75 in (1490 mm)
Scrub brush (2), path width -- 50 in (1270 mm)
Scrub brush (2), diameter -- 11 in (280 mm)
Rear squeegee path width -- 56.5 in (1435 mm)
Debris hopper capacity -- 2.6 cu ft (0.073 m3)
MACHINE WEIGHTS
GVWR -- 7200 lb (3270 kg)
GENERAL MACHINE PERFORMANCE
Maximum forward speed -- 9 mph (14.5 km/h)
Maximum reverse speed -- 5 mph (8 km/h)
Turning radius, right -- 109 in (2270 mm)
Turning radius, left -- 100 in (2540 mm)
Maximum rated climb and descent angle -- 10_
Maximum rated climb and ascent angle when tanks
are full -- 8_
Sound level continuous 88 + 1dB(A)
Sound level peak 102 + 1dB(C)
Viberation does not exceed 2.5 m/s2

SPECIFICATIONS
11
550 MP148EN (2--06)
MACHINE DIMENSIONS
SIDE VIEW
TOP VIEW
156 in (3960 mm)
62.3 in
(1580 mm)
52.3 in
(1330 mm)
61 in
(1550 mm)
61 in
(1550 mm)
55.75 in
(1415 mm)
46.6 in
(1185 mm)
52.6 in
(1335 mm)
00362

OPERATION
550 MP148EN (6--97)
12
PREPARATION FOR OPERATION
AFTER UNLOADING AND BEFORE OPERATING
THE 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 hydraulic fluid level in the hydraulic
fluid reservoir, using the dipstick provided.
TENNANT hydraulic fluid is recommended. If
TENNANT hydraulic fluid is not available, use
only new, approved hydraulic fluid. See the
HYDRAULICS in the MAINTENANCE section.
4. Check the engine oil level.
5. Check the radiator coolant level.
6. Check the brush adjustment, as described in
SCRUB HEAD in the MAINTENANCE section.
7. Check the air pressure of the tires.
8. Fill the fuel tank, or install an LPG fuel tank on
the machine per the instructions in this manual.

OPERATION
13
550 MP148EN (9--08)
OPERATION OF CONTROLS
C
E
D
G
F
I
J
H
ABK
00291
MACHINE COMPONENTS
A. Steering Wheel G. Articulated Joint
B. Instrument Panel H. Side Squeegee
C. Solution Tank I. Head Pivot
D. Rear Squeegee J. Debris Trough Release Lever
E. Recovery Tank K. Fuel Tank
F. Clean-out Door

OPERATION
550 MP148EN (3--05)
14
A
B
C
D
EF
G
H
I
CC
K
L
M
N
O
P
Q
R
S
TU
V
W
X
AA
BB
DD
(For machines below
serial number 006409)
J
Y
Z
02353
INSTRUMENTS AND CONTROLS -- GAS/LPG and DIESEL ENGINES (For machines below serial number
007003)
A. Brake Pedal P. Fuses
B. Directional Pedal Q. Engine Hour Meter
C. Operator Seat R. Instrument Panel
D. Parking Brake Lever S. Oil Pressure Gauge
E. Ammeter T. Engine Coolant Temperature Gauge
F. Squeegee Position Lamp U. Squeegee Switch
G. Tank Drain Lamp (Option) V. Scrub Brush Lever
H. Scrub Brush Pressure Lamp (Option) W. Scrub Head Position Lever
I. Ignition Switch X. SRS Panel (Option)
J. Diesel Pre-Heat Indicating Lamp Y. Solution Lever
K. Operating Lights Switch (Option) Z. Choke Knob (Continental)
L. Rotating Light Switch (Option) AA.Throttle Lever
M. Hazard Light Switch (Option) BB.Steering Wheel
N. Fuel Level Gauge CC.Horn Button
O. Panel Lamp (Option) DD.Throttle Switch

OPERATION
15
550 MP148EN (3--05)
AB
C
D
E
F
G
H
I
J
K
N
Q
L
M
O
P
R
Y
Z
S
T
U
V
X W
02353
INSTRUMENTS AND CONTROLS -- GAS/LPG GM ENGINES (For machines serial number 007006 and
above)
A. Brake Pedal P. Circuit Breakers
B. Directional Pedal Q. Engine Hour Meter
C. Operator Seat R. Instrument Panel
D. Parking Brake Lever S. Squeegee Switch
E. Engine Coolant Temperature Gauge T. Scrub Brush Lever
F. Horn Button U. Scrub Head Position Lever
G. Tank Drain Lamp (Option) V. Throttle Switch
H. Scrub Brush Pressure Lamp (Option) W. Solution Lever
I. Ignition Switch X. SRS Panel
J. Check Engine Light Y. Low Engine Oil Pressure Light
K. Operating Lights Switch (Option) Z. Charging System Light
L. Rotating or Hazard Light Switch
(Option)
M. Steering Wheel
N. Fuel Level Gauge
O. Panel Lamp (Option)

OPERATION
550 MP148EN (3--05)
16
AB
C
D
E
F
G
H
I
J
K
N
Q
L
M
O
P
R
Y
Z
S
T
UV
X
W
02353
INSTRUMENTS AND CONTROLS -- DIESEL CAT ENGINES (For machines serial number 007003 and
above)
A. Brake Pedal P. Circuit Breakers
B. Directional Pedal Q. Engine Hour Meter
C. Operator Seat R. Instrument Panel
D. Parking Brake Lever S. Squeegee Switch
E. Engine Coolant Temperature Gauge T. Scrub Brush Lever
F. Horn Button U. Scrub Head Position Lever
G. Tank Drain Lamp (Option) V. Throttle Lever
H. Scrub Brush Pressure Lamp (Option) W. Solution Lever
I. Ignition Switch X. SRS Panel
J. Diesel Pre-Heat Indicating Lamp Y. Low Engine Oil Pressure Light
K. Operating Lights Switch (Option) Z. Charging System Light
L. Rotating or Hazard Light Switch
(Option)
M. Steering Wheel
N. Fuel Level Gauge
O. Panel Lamp (Option)

OPERATION
17
550 MP148EN (5--97)
BRAKE PEDAL
The brake pedal operates the brakes on the two front
wheels.
To stop the machine, return the directional control
pedal to neutral; then apply pressure to the brake
pedal.
DIRECTIONAL PEDAL
A single foot pedal controls the propelling drive. The
foot pedal is used to select the direction of travel and
the speed of the machine.
A
B
C
E
D
00116
DIRECTIONAL PEDAL
A. “Reverse” Position
B. “Neutral” Position
C. “Forward” Position
D. “Toe” Portion
E. “Heel” Portion
Gradually press the “toe” portion of the pedal for
forward travel or the “heel” portion of the pedal for
reverse travel. Regulate the speed of the machine by
varying the pressure on the pedal.
NOTE: Always use the brake pedal for normal
stopping and controlling machine speed on down
grades.
OPERATOR SEAT
The operator seat is of a fixed back style with a
forward-backward adjustment. To adjust the seat,
loosen the seat mounting bolts, slide the seat to the
position desired, and tighten the bolts.
SCRUB HEAD LOCK LEVER
The scrub head lock lever controls the scrub head
lock mechanism. This locks the scrub head,
preventing it from lowering.
To set the scrub head lock, fully raise the scrub head.
Then push the scrub head lock lever into the “LOCK”
position.
To release the scrub head lock, fully raise the scrub
head. Then pull the scrub head lock lever into the
“UNLOCK” position.
Always set the scrub head lock before working under
the scrub head. The scrub head lock must also be set
whenever the machine will not be used for an
extended period of time, overnight for example. Flat
spots on the brushes will appear if the scrub head is
left down for an extended period of time.
WARNING: Raised Scrub Head May Fall.
Block Scrub Head Up.
B
A
01816
SCRUB HEAD LOCK LEVER
A. Operator Seat
B. Scrub Head Lock Lever

OPERATION
550 MP148EN (3--05)
18
PIVOT LOCK PIN
The pivot lock pin is provided to lock the pivot joint
between the front and rear machine sections. The pin
is hung on the front section of the machine adjacent
to the machine pivot.
To lock the sections, turn the machine so the pivot
lock holes line up, then insert the pin in the lined up
holes. The pin will prevent the machine from pivoting
and creating a pinch area.
WARNING: Crush Hazard Between Front
And Rear Halves Of Machine. Engage Pivot
Lock.
B
C
A
00251
PIVOT LOCK PIN IN USE
A. Machine Trailer Section
B. Machine Tractor Section
C. Pivot Lock Pin
PARKING BRAKE LEVER
The parking brake lever controls the brakes on the
two front wheels. To set the parking brake pull the
brake handle up. To release the parking brake push
the brake handle down. Always set the parking brake
before leaving the machine unattended and before
working on the machine.
FOR SAFETY: Before Leaving Or Servicing
Machine; Stop On Level Surface, Set
Parking Brake, Turn Off Machine And
Remove Key.
AMMETER (For machines below serial number
007003)
The ammeter registers the charging current which is
being passed to the battery by the alternator. It also
registers battery discharge used by the machine when
the alternator is not charging.
CHARGING SYSTEM LIGHT (For machines serial
number 007003 and above)
The charging system light comes on when the
existing voltage potential of the battery is not within
normal range (10 to 14 Volts). Stop operating the
machine. Locate the problem and have it corrected.
SQUEEGEE POSITION LAMP (For machines
below serial number 007003)
The squeegee position lamp lights when the
squeegee is either fully raised or lowered. This can be
helpful to the operator when the squeegee is not
visible.
CHECK ENGINE LIGHT (For machines serial
number 007006 and above)
The check engine light comes on if the engine control
system detects a fault during machine operation.
If the check engine light comes on while operating the
machine, contact a TENNANT service representative.
IGNITION SWITCH
The key-operated ignition switch has four positions.
Those positions are “accessories,” “off,” “on,” and
“start.” To operate any electrical option without
operating the engine, turn the switch to the
“accessories” position.
To start the engine, turn the key to the “start” position.
Do not engage the starter for more than ten seconds
at a time, or after the engine has started, as the
starter may be damaged. To stop the engine, turn the
key to the “off” position.
FOR SAFETY: Before Starting Machine,
Make Sure All Safety Devices Are In Place
And Operate Properly.
NOTE: When restarting GM engines, you must wait
15--20 seconds before the starter motor will engage
again.
CAUTION: LPG engine will run for a few
seconds after key is turned off. Apply
parking brake before leaving machine.
NOTE: To protect the GM engine’s emission
components on the LPG powered machines serial
number 006409 and above, the engine will continue to
operate for a few seconds after the ignition switch is
turned off.