PowerBoss Nautilus Hi-Dump PB45HDSL User manual

User Manual
Nautilus Hi-Dump &
Nautilus Hi-Dump CE
Rider Scrubber/Sweeper
Models: Diesel, Gasoline, & LPG
PowerBoss®, Minuteman International, Inc.
A Member of the Hako Group
#988752UM Rev. * 03/16

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 2
PREFACE
Thank you for your purchase of the new industry standard for scrubber/sweepers. PowerBoss® takes
great pride in off ering the most dependable, reliable and best value in industrial power scrubbers and
sweepers. We set the standard.
Our Customer Service Department would like to hear from you. If you see any errors, omissions or
something that needs clarifi cation in this User Manual, please let us know. We are working hard to-
wards continually improving our processes--to benefi t you, our valued customer.
Please copy the form below, fi ll out and comment on how you found our manual.
Thank you!
The PowerBoss Team
PREFACE

Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
© 2014-2015 Minuteman International, Inc.
Page 3
Name: _____________________________________________
Title: _______________________________________________
Company Name: _____________________________________
Address: ____________________________________________
Country: ____________________________________________
Type of equipment or model number: ______________________
Comments: ___________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Please return to:
Customer Service Manager
PowerBoss®, Minuteman International, Inc.
14N845 U.S. Route 20
Pingree Grove, Illinois 60140 USA
Phone: [phone]
Email: [email protected]
PREFACE

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 4
This is the User Manual for the PowerBoss® Nautilus Hi-Dump Rider Scrubber/Sweeper.
This manual covers all Standard Nautiilus Hi-Dump machine variations beginning July 2015.
We believe this machine will provide excellent service for many years.
However, the best results will be obtained if:
• The machine is operated with reasonable care.
• The machine is maintained regularly per the maintenance schedule provided in this User Manual.
• The machine is maintained with PowerBoss® supplied or equivalent parts.
All right side and left side references to the machine (except for engine) are determined by facing the
direction of forward travel. The front of the engine or engine fan faces the front of the machine. Some
hardware considered to be common or locally available has been omitted from the parts section to make
this manual clear. Be sure to use equivalent hardware when replacement becomes necessary.
The Model and Serial Number of your machine is shown on the I.D. name plate. This information is
needed when contacting Technical Support or when ordering parts. The I.D. plate is mounted on the left
side wall of the operator seating area.
Example I.D. Plate:
PREFACE

Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
© 2014-2015 Minuteman International, Inc.
Page 5
Parts may be ordered by phone, fax or e-mail from your local PowerBoss® parts and service center.
Before ordering parts or supplies, be sure to have your machine Model Number and Serial Number
handy. For your convenience Fill out the Machine Data block for future reference.
MACHINE DATA
Fill out at installation
Model Number: ___________________________________
Serial Number: ___________________________________
Engine Serial Number: _____________________________
Sales Rep.: _________________ Date of Install: ________
All information contained in this catalog is current at the time of printing.
Minuteman International, Inc. reserves the right to make changes at any time without notice.
PowerBoss®, Minuteman International, Inc., Copyright 2014-2015, Printed in USA
PREFACE

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 6
TECHNICAL SPECIFICATIONS
GENERAL MACHINE SPECIFICATIONS
Length:. . . . . . . . . . . . . . . . . . . . . . . . . . . 95.0 in (241 cm)
Width with side scrub brush retracted: . . .60.3 in (153 cm)
Width with side scrub brush extended:. . .65.5 in (166 cm)
Height to lowest steering position:. . . . . . 60.5 in (153 cm)
Height w/overhead guard: . . . . . . . . . . . . 83.5 in (212 cm)
Wheelbase: . . . . . . . . . . . . . . . . . . . . . . . 47.75 in (121 cm)
Front tires (molded): . . . . . . . . . . . . . . . .16 in x 6 in
. . . . . . . . . . . . . . . .(40 cm x 15 cm)
Rear tires (press on):. . . . . . . . . . . . . . . .18 in x 5 in
. . . . . . . . . . . . . . . .(45 cm x 12 cm)
Aisle width U-turn: . . . . . . . . . . . . . . . . . .8 ft - 11.7 in (274 cm)
Weight (Diesel engine) . . . . . . . . . . . . . .4,047 lb (1836 kg)
Weight (Gas & LPG engines) . . . . . . . . .4,027 lb (1826 kg)
Maximum forward speed: . . . . . . . . . . . .7.7 mph (12,4 km/h)
Maximum reverse speed: . . . . . . . . . . . .4.0 mph (6,4 km/h)
Maximum climb angle (Traveling):. . . . . .10 deg. (17% grade)
Maximum climb angle (Scrubbing): . . . . .8 deg. (14% grade)
SCRUBBING SYSTEM
Cleaning path (main brushes) . . . . . . . . . 45 in (114 cm)
Cleaning path (w/optional side brush) . . . . 60 in (152 cm)
Main brush diameter:. . . . . . . . . . . . . . . . . 12 in (30 cm)
Main brush length:. . . . . . . . . . . . . . . . . . . 45 in (114 cm)
Main brush speed:. . . . . . . . . . . . . . . . . . . 425 RPM
Main brush force:. . . . . . . . . . . . . . . . . . . . 200 lb - 400 lb
. . . . . . . . . . . . . . . . . . . . (90 kg - 181 kg)
Side scrub brush diameter: . . . . . . . . . . . . 16 in (40 cm)
Side scrub brush speed: . . . . . . . . . . . . . . 200 RPM
Solution tank capacity:. . . . . . . . . . . . . . . . 90 gal (397 L)
Recovery tank capacity: . . . . . . . . . . . . . . 90 gal (397 L)
Open tank and demister
chamber capacity: . . . . . . . . . . . . . . . 26 gal (64 L)
Debris hopper, volume capacity: . . . . . . . . 3.9 ft³ (0.11 m³)
Debris hopper, weight capacity:. . . . . . . . . 400 lbs. (181 kg)
Hopper dump height: Variable to clear . . 60 in. (1524mm)
Vacuum fan speed: . . . . . . . . . . . . . . . . . . 11,500 RPM
Vacuum water lift: . . . . . . . . . . . . . . . . . . . 35 in (88 cm)
TECHNICAL SPECIFICATIONS
Model: Nautilus Hi-Dump Rider Scrubber/Sweeper Nautilus CE Rider Scrubber/Sweeper
Model No.: PB45HDSL(Diesel), PB45HGAS(Gas), PB45HLP(LPG) PB45HDSLCE(Diesel), PB45HLPCE(LPG)

Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
© 2014-2015 Minuteman International, Inc.
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TECHNICAL SPECIFICATIONS
55.0"
(1397mm)
FRAME
95.0"
60.5"
(1537mm)
STEERING
WHEEL AT
LOWEST
POSITION
59.3"
(1506mm)
57.00"
(1448mm)
ROLLERS
62.3"
(1582mm)
ROLLERS
W/ OPTIONAL
SIDE BRUSH

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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TABLE OF CONTENTS
PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . 6
GENERAL MACHINE SPECIFICATIONS . . . . . . . . . . 6
SCRUBBING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 6
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AIR-MOVING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 12
ERGONOMICS SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 12
HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 12
MULTI-LEVEL HOPPER DUMP SYSTEM . . . . . . . . . . 12
DRIVE-TRAIN SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 12
CHASSIS SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ENVIRONMENTAL FRIENDLY FEATURES . . . . . . . . 12
LOWER EMISSIONS . . . . . . . . . . . . . . . . . . . . . . . . 12
SAFER WORK ENVIRONMENT. . . . . . . . . . . . . . . 13
SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . 13
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . 13
FOR SAFETY DURING OPERATION . . . . . . . . . . . . . 13
SAFETY WHEN SERVICING OR MAINTAINING . . . . 14
SAFETY SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SAFETY DECALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
BASIC POWERBOSS® SAFETY . . . . . . . . . . . . . . 17
MACHINE OPERATION . . . . . . . . . . . . . . . . . . . . . . 20
OPERATING CONTROLS AND INDICATORS . . . . . . 20
IGNITION SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
THROTTLE / GLOW PLUG SWITCH. . . . . . . . . . . . . . 20
MURPHY SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
LIGHT SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
HORN BUTTON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FUEL LEVEL GAUGE . . . . . . . . . . . . . . . . . . . . . . . . . . 20
CIRCUIT BREAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
IDLE BUTTON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
HOUR METER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INDICATOR LIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CHECK ENGINE INDICATOR. . . . . . . . . . . . . . . . . 22
ENGINE OIL PRESSURE INDICATOR . . . . . . . . . 22
ENGINE COOLANT TEMPERATURE INDICATOR 22
RECOVERY TANK FULL INDICATOR . . . . . . . . . . 22
SOLUTION TANK EMPTY INDICATOR . . . . . . . . . 22
DIRECTIONAL CONTROL PEDAL . . . . . . . . . . . . . . . . 23
BRAKE / PARKING BRAKE . . . . . . . . . . . . . . . . . . . . . 23
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Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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TILT STEERING LEVER . . . . . . . . . . . . . . . . . . . . . . . . 23
SEAT ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
INSTRUMENT PANEL CONTROL SWITCHES . . . 24
SCRUBBING CONTROL DETAILS/FUNCTIONS 26
GREEN “ONE-TOUCH” SWITCH . . . . . . . . . . . . . . . . . 26
SQUEEGEE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SCRUB BRUSH SWITCH . . . . . . . . . . . . . . . . . . . . . . . 26
SIDE SCRUB BRUSH SWITCH - OPTION . . . . . . . . . 27
MAIN BRUSH SCRUB PRESSURE KNOB . . . . . . . . . 27
SIDE BRUSH SCRUB PRESSURE . . . . . . . . . . . . . . . 27
SOLUTION CONTROL KNOB . . . . . . . . . . . . . . . . . . . 27
HOPPER HIGH DUMP SWITCHES . . . . . . . . . . . . . . . 28
BUMPER RAISE/LOWER SWITCH . . . . . . . . . . . . . . . 28
HOPPER RAISE/LOWER SWITCH . . . . . . . . . . . . . . . 28
HOPPER DUMP DOOR SWITCH. . . . . . . . . . . . . . . . . 29
BASIC SCRUBBING/FILLING/EMPTYING
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CHOOSING THE CORRECT TYPE OF BRUSH. . . . . 29
FILLING THE SOLUTION TANK. . . . . . . . . . . . . . . . . . 30
FILLING THE SOLUTION TANK. . . . . . . . . . . . . . . . . . 31
NORMAL SCRUBBING . . . . . . . . . . . . . . . . . . . . . . . . . 32
DOUBLE SCRUBBING . . . . . . . . . . . . . . . . . . . . . . . . . 34
STOP SCRUBBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
WATER PICK UP MODE (SQUEEGEE ONLY) . . . . . . 36
STOP WATER PICK UP . . . . . . . . . . . . . . . . . . . . . . . . 37
DRAINING/CLEANING THE RECOVERY TANK . . . . 37
EMPTYING/CLEANING THE DEBRIS HOPPER . . . . 38
INSERTING THE BUMPER LIFT SAFETY PIN AND
HOPPER LIFT SAFETY PIN. . . . . . . . . . . . . . . . . . . . . 40
REMOVING THE BUMPER LIFT SAFETY PIN AND
HOPPER LIFT SAFETY PIN. . . . . . . . . . . . . . . . . . . . . 43
CLEANING THE HOPPER AND HOPPER DEBRIS
SCREEN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
DRAINING THE SOLUTION TANK . . . . . . . . . . . . . . . 45
OPERATING PROCEDURES. . . . . . . . . . . . . . . . . . 45
PRE-OPERATION CHECKS. . . . . . . . . . . . . . . . . . . . . 46
STARTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
DRIVING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SLOWING AND STOPPING . . . . . . . . . . . . . . . . . . 48
INCLINES OR SLIPPERY SURFACES . . . . . . . . . 48
STOP THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . 48
TRANSPORTING THE MACHINE . . . . . . . . . . . . . . . . 49
USING A TRAILER OR TRANSPORT VEHICLE 49
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© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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PUSHING OR TOWING THE MACHINE . . . . . . . . 49
OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
CHEMICAL METERING . . . . . . . . . . . . . . . . . . . . . . . . 50
AUTO-FILL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
NEUTRAL START SENSOR (CE). . . . . . . . . . . . . . . . . 51
OPERATOR SEAT SENSOR (CE) . . . . . . . . . . . . . . . . 52
KEY LOCKED ENTRY DOORS (CE) . . . . . . . . . . . . . . 52
PREVENTATIVE MAINTENANCE . . . . . . . . . . . . . . 52
SCHEDULED MAINTENANCE CHART . . . . . . . . . . . . 53
PREVENTATIVE MAINTENANCE INSTRUCTIONS 56
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
AIR INTAKE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 57
ELECTRICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . 59
Battery Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . 59
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . 60
Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
COOLANT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 62
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
LUBRICATION POINTS . . . . . . . . . . . . . . . . . . . . . 64
Steering Fork Bearings . . . . . . . . . . . . . . . . . . . . 64
Rear Wheel Bearings . . . . . . . . . . . . . . . . . . . . . . 64
Squeegee Caster Bearings . . . . . . . . . . . . . . . . . 64
Scrub Head Lift Arm Bearings . . . . . . . . . . . . . . . 64
Bumper and Hopper Lift Arm Pivot Bearings . . . . 64
Rear Lift Arm Latch . . . . . . . . . . . . . . . . . . . . . . . 64
Hopper Top Cover . . . . . . . . . . . . . . . . . . . . . . . . 64
LATCHES & HINGES . . . . . . . . . . . . . . . . . . . . . . . . 64
STATIC STRAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
HYDRAULIC SYSTEM. . . . . . . . . . . . . . . . . . . . . . . 65
Hydraulic Fluid Reservoir . . . . . . . . . . . . . . . . . . . 65
Hydraulic Fluid Viscosity Specifi cations . . . . . . . . 66
Changing the Hydraulic Fluid . . . . . . . . . . . . . . . . 66
Hydraulic Fluid Filter . . . . . . . . . . . . . . . . . . . . . . 67
Changing The Hydraulic Fluid Filter. . . . . . . . . . . 68
Maintaining Hydraulic Oil Cooler Effi ciency . . . . . 69
Adjusting the Propulsion Pump Neutral Setting 69
Drive Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
SCRUBBING COMPONENTS . . . . . . . . . . . . . . . . 71
Scrub Brushes . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Replace or Rotate the Cylindrical Scrub Brushes 72
Checking the Scrub Brush Pattern . . . . . . . . . . . . 74
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Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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Adjusting the Scrub Brush Pattern (Taper). . . . . . 75
Adjusting the Scrub Brush Pattern (Equal width) 76
SIDE SCRUB BRUSH (OPTION) . . . . . . . . . . . . . . 76
Replacing the Side Scrub Brush . . . . . . . . . . . . . 76
SQUEEGEES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Lowering Squeegee for Adjustment (engine off ) 77
Checking the Rear Squeegee Blade Flare. . . . . . 78
Adjusting the Rear Squeegee Blade Flare. . . . . . 78
Leveling the Rear Squeegee . . . . . . . . . . . . . . . . 80
Turning or Replacing the Rear Squeegee Blades 81
SIDE SQUEEGEES . . . . . . . . . . . . . . . . . . . . . . . . . 84
Replacing Side Squeegee Blades . . . . . . . . . . . . 84
SIDE SCRUB BRUSH SQUEEGEE (OPTION) 85
Replacing Side Scrub Brush Squeegee Blade 85
SKIRTS AND SEALS . . . . . . . . . . . . . . . . . . . . . . . . 85
Scrub Deck Front Skirt . . . . . . . . . . . . . . . . . . . . . 85
Hopper Dump Door Seals . . . . . . . . . . . . . . . . . . 85
Scrub Deck Rear Skirt . . . . . . . . . . . . . . . . . . . . . 85
Hopper Vacuum Seal . . . . . . . . . . . . . . . . . . . . . 86
Cover Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
BRAKES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Service Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Adjusting the Brake System . . . . . . . . . . . . . . . . . 86
TIRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Changing Solid Tires . . . . . . . . . . . . . . . . . . . . . . 87
Front Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Rear Tires. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
SENSING SWITCHES. . . . . . . . . . . . . . . . . . . . . . . 89
Adjusting the Neutral Sensing Switch . . . . . . . . . 89
Neutral Sensing Switch Adjustment: . . . . . . . . . . 89
Adjusting the Nautilus Reverse Sensing Switch
Nautilus Reverse Sensing Switch Adjustment:
COVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Mount Adjustment: . . . . . . . . . . . . . . . . . . . .
SOLUTION DELIVERY BAR & FILTER SYSTEM
Solution Delivery Bar . . . . . . . . . . . . . . . . . . . . . .
Solution Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 91
CE DECLARATION OF CONFORMITY . . . . . . . . . 98
WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
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© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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FEATURES
FEATURES
AIR-MOVING SYSTEM
• Internal sound insulation on vacuum impeller
ERGONOMICS SYSTEM
• Roomy, open operator compartment for extra comfort
• Toe operated parking brake
• Adjustable, high-back seat
• Power steering and tilt steering wheel
• Unparalleled maintenance accessibility, hinged sides
and covers require no tools.
HYDRAULIC SYSTEM
• Protection for both auxiliary and propulsion pumps
using separate 100 mesh suction strainer
• Hydraulic reservoir equipped with site gauge and dip
stick for fl uid level check and replacement
• Hydraulic fi lter equipped with color coded pressure
gauge to indicate fi lter replacement
MULTI-LEVEL HOPPER DUMP SYSTEM
• Debris hopper can be emptied from ground level up to
60” height.
• No need to hand dump debris hopper
DRIVE-TRAIN SYSTEM
• Industrial liquid-cooled engine
• Heavy-duty radiator & Tri-phase air cleaner
• Hydraulics protection package
• 4-Core Radiator
CHASSIS SYSTEM
• Massive One-Piece, unitized 7ga, 0.188 in (0,48 cm)
thick steel frame
• Soft-ride tires
ENVIRONMENTAL FRIENDLY FEATURES
LOWER EMISSIONS
All gas and LP engines meet EPA and CARB specifi cations
and have catalyst muffl ers. Diesel operation is available,
bio-diesel fuel can be used in Kubota engines.

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SAFER WORK ENVIRONMENT
Orange machines are highly visible to others in the
workplace, simple controls reduce operator error. Machine is
equipped with a horn and an eff ective braking system. Some
Safety Options available are: Overhead Guard, Backup
Alarm, Safety Lights, and Fire Extinguisher.
SAFETY INFORMATION
IMPORTANT SAFETY INSTRUCTIONS
Operators must read and understand this manual before
operating or maintaining this machine.
Do not operate this machine in fl ammable or explosive
areas.
This machine is designed solely for removing dirt, dust and
debris in an outdoor or indoor environment. PowerBoss does
not recommend using this machine in any other capacity.
The following information indicate a potential hazard to the
operator and equipment. Read this manual carefully and
be aware when these conditions can exist. Take necessary
steps to locate all safety devices on the machine and train
the personnel operating the machine. Report any machine
damage or faulty operation immediately. Do not use machine
if it is not in proper operating condition.
FOR SAFETY DURING OPERATION
Keep hands and feet clear of moving parts while machine is
in operation.
Make sure all safety devices are in place and operate
properly. All covers, doors and latches must be in place,
closed and fastened before use.
During operation, attention should be paid to other persons
in the work area and especially if small children are present.
Components can cause an explosion when operated near
explosive materials or vapor. Do not operate this machine
near fl ammable materials such as solvents, thinners, fuels,
grain dust, etc.
Store or park this machine on a level surface only. To prevent
unauthorized use, machine should be stored or parked with
the parking brake set and the key removed.
This machine is designed for level operation only. Do not
operate on ramps or inclines greater than 14 degrees (24.9%
grade).
This machine is not suitable for picking up hazardous dusts.
Use caution when moving this machine into areas that are
below freezing temperatures.
SAFETY INFORMATION

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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SAFETY INFORMATION
SAFETY WHEN SERVICING OR MAINTAINING
THE MACHINE
Stop on level surface, set parking brake and turn off
machine.
Disconnect the power to the machine when servicing.
Avoid moving parts. Do not wear loose jackets, shirts, or
sleeves when working on machine.
Avoid contact with battery acid. Battery acid can cause
burns. When working on or around batteries, wear protective
clothing and safety glasses. Remove metal jewelry. Do not
lay tools or metal objects on top of battery.
Authorized personnel must perform repairs and
maintenance. Use PowerBoss supplied replacement parts.
SAFETY SYMBOLS
Five symbols are used throughout this manual to emphasize
various levels of safety information. These symbols and the
meaning of each are listed below.
DANGER
To warn of immediate hazards which will result in
severe personal injury or death
WARNING
To warn of hazards or unsafe practices which could
result in severe personal injury or death.
CAUTION
To warn of hazards or unsafe practices which could
result in minor personal injury.
ATTENTION!
To warn of practices which could result in extensive
equipment damage.
NOTE: To direct your attention to important equipment
information or special instructions for
preventing damage to equipment
Symbols at the top of the list are the strongest warnings.
However, all symbols represent important information which
should be observed to protect you and others from harm and
injury, and to prevent damage to the equipment.

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SAFETY DECALS
Decals directly attached to various parts of the unit are highly
visible safety reminders which should be read and observed.
Make sure the decals are replaced if they become illegible or
damaged.
Safety decals located in the Operator compartment area:
#3342264: #3301854: #715967:
(Read
Manual)
SAFETY INFORMATION
Safety decals located on the outside of the machine:
#3342650 #3301732 #3342978
(Hot Surface)
(Pinch Point)
Safety Decal on inside of Recovery Tank Cover:
#715965
Safety decals on inside of Main Brush Side Doors:
#715968

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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Safety decals located in the Engine compartment area:
#3301730 #3301733
Safety decals located in Fuel Tank area:
#715953 #715949
#3342971
SAFETY INFORMATION
Safety decals located in Hydraulic Reservoir area:
#715966 #715023
#715497

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SAFETY INFORMATION
BASIC POWERBOSS® SAFETY
PowerBoss® scrubbers should never be operated unless:
1. The operator is trained and authorized to operate
the equipment and,
2. The equipment is functioning correctly.
Malfunctioning equipment should be removed from
service.
DANGER
Keep cigarettes, matches and all other fl ame sources
away from the machine. Gasoline, LP Gas, and diesel
fuels are highly fl ammable. Lead acid batteries
are equally dangerous due to the highly explosive
hydrogen gas they emit.
WARNING
Do not operate an LPG powered scrubber when any
component in the fuel system is malfunctioning or
leaking.
WARNING
Before starting the engine, make sure that:
* You have read and understood this User Manual
* You are securely seated in the operator’s seat.
* The parking brake is engaged.
* The directional control pedal is in neutral.
* The throttle is in idle.
* Hydraulic controls are in the OFF position.
WARNING
During operation:
* Keep your hands and body clear of moving parts,
especially when the bumper is partially or fully
raised.
* Make sure others in the area stay clear of the
machine, equipment, and moving parts.

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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SAFETY INFORMATION
WARNING
During cleaning and maintenance:
* Always stop the engine and set the parking brake
before servicing.
* Never use detergents or cleansers that are
fl ammable or combustible.
* Never infl ate a pneumatic tire without using a safety
gage.
* Do not attempt any impeller adjustment unless you
have shut off the engine. Never place your hands
near the intake hoses or inlet when the engine is
running.
* Always engage the bumper safety arm before
servicing the hopper. Do not rely on the gas struts to
keep the bumper raised.
* Never test for hydraulic hose leaks using your hand
or any other part of your body. High pressure leaks
can be very dangerous and should only be checked
using a piece or paper.
WARNING
When leaving the scrubber unattended:
* Place the controls in the OFF position.
* Set the parking brake.
* Shut off the engine.
* Remove the key.
WARNING
When servicing or repairing the fuel system:
* Work in a properly ventilated area, do not smoke or
allow an open fl ame near the fuel system.
* Never bypass safety components unless you are
testing them.
* Never bypass the fuel fi lter lock, except when
testing them (and always reconnect them after
testing).
* Wear gloves to disconnect the tank coupling.

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WARNING
Replace any defective safety components before
operating the scrubber.
WARNING
When servicing or working around or under raised
hopper or squeegee lift:
* Install the hopper and bumper lift safety pins.
CAUTION
Do not drive with the hopper or bumper in the raised
position. Driving with the hopper or bumper lift
raised increases the risk of damaging the hopper or
squeegee lift and other hazards.
CAUTION
Travel slowly on grades.
CAUTION
Place a block or chock behind the wheels when
parking on inclines.
CAUTION
Use special care when traveling on wet surfaces.
CAUTION
Observe all proper procedures for operation and
maintenance of the unit, as outlined in this manual.
CAUTION
Remain alert at all times to people and equipment in
and around your area of operation.
ATTENTION!
Never push or tow this machine faster than 1 mph (1,6
km/h).
ATTENTION!
Engage tow valve before towing or pushing.
SAFETY INFORMATION

© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
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MACHINE OPERATION
OPERATING CONTROLS AND INDICATORS
The right dark gray portion of the instrument panel contains
the engine function switches and indicators.
The left light gray portion of the instrument panel contains
the scrubbing function switches and indicators.
IGNITION SWITCH
The ignition switch is located to the right of the
steering column and is used to start and stop the
engine.
THROTTLE / GLOW PLUG SWITCH
The LPG and gasoline machines have a two speed
throttle switch with idle, operating selection. The
diesel machine has three position throttle with, glow
plug, idle and operating selections. The throttle
is located to the right of the steering column and
adjusts the engine speed.
• The glow plug selection activates the glow plugs.
• The throttle should be in the IDLE position when
starting the engine and immediately before shutdown.
• The operating position should be used during
operation to ensure proper brush speed.
MURPHY SWITCH
Only on the Diesel machines, the Murphy switch
is an automatic diesel shutdown that occurs if the
oil pressure is too low, below 5 psi (34 kPa), and/or the water
temperature is too high, above 200°F (93.3°C). To restart
the engine, press and hold the Murphy switch while turning
the ignition switch. This action will reset and clear the error
code. Auto shutdown will continue if the oil pressure remains
low or the water temperature is too high.
LIGHT SWITCH
The light switch is located on the left side of the
operator compartment. It operates the head lights
and tail lights.
HORN BUTTON
The horn is activated by pressing the horn button
which is located to the right of the steering
column below the throttle switch.
FUEL LEVEL GAUGE
The gasoline and diesel models are equipped
with a fuel gauge. The gauge is located in the
upper left of the steering column. This gauge
indicates the amount of fuel remaining in the tank.
LPG machines do not have this gauge.
MACHINE OPERATION