Minuteman E28 User manual

Minuteman,Inc.
A member Of The Hako Group
User Manual
E28/30/33
988745UM REV A 07/2022

Page 2
Introduction
Preface
Dear customer,
It is our desire that the good characteristics of the macine
should justify the confi dence you demonstrated by
making this purchase. Prior to the fi rst operation, carefully
read the chapter “Safety Information” in order to ensure
your safety working with the machine. Your own safety, as
well as the safety of others, depends greatly on how the
vehicle is moved and operated. Therefore, carefully read
and understand this manual before operation.
This manual provides valuable information about
operation, service and maintenance. The warning
symbols used in this manual identifi es items that are
relevant to safety. Please observe the safety provisions
(see chapter “Safety Information”).
Your authorized Minuteman dealer will be pleased
to answer further questions regarding the unit or the
operation and maintenance manual. Please be advised
explicitly that we cannot accept any legal issues out
of the contents of this manual. If repair work must be
performed make sure that only genuine spare parts are
used. Genuine spare parts help guarantee a dependable
machine. We reserve the right to make changes without
notice.
Minuteman International,Inc.
14N845 US Route 20
Pingree Grove, Illinois 60140
Proper use
The E28/30/33 machines are a vacuum scrubbing
machine used for the wet cleaning of hard-surfaced
fl oors. Using the machine beyond this scope of it’s
application will be deemed improper and negligent
use. The manufacturer cannot be held liable for
consequential damages, the user alone bears the
risk. The term of proper use also includes operation,
maintenance and repair work to be performed in
compliance with the manufacturer’s specifi cations.
The E28/30/33 may be used by Qualifi ed persons
familiar with the machine and aware of possible
hazards involved.
The applicable Accident Prevention Regulations
and further regulations concerning safety and work
must be complied with.
If modifi cations to the machine are made in absence of
the manufacturer’s prior consent, Minuteman cannot be
held liable for damage resulting from such unauthorized
modifi cation.

Page 3
Notes on warranty
The terms defi ned in the purchase agreement apply. Claims for
compen sation related to damage are excluded from the terms
of warranty when the damage is the result of failure to ob serve
regulations concerning service and maintenance. Maintenance
work must be performed by authorized Minuteman service
centers and confi rmed in the “Maintenance Report” which
serves as a warranty logbook.
The following are excluded from the terms of warranty: wear
and tear through overuse, defective fuses, im proper handling
and use or unauthor ized modifi cations. Claims under the
terms of warranty are also annulled when damage occurs to
the vehicle re sulting from the use of parts or accesso ries not
explicitly approved by us or from failure to observe maintenance
regulations.
Acceptance of the machine
Upon arrival, check machine for possible
damages in transit. Follow unpacking instructions
on shipping pallet. Each unit has been tested and
thoroughly inspected before shipment. Any damage
is the responsibility of the delivery carrier who
should be notifi ed immediately.
For refund of such damage, have the freight
forwarder confi rm damage and mail notifi cation
along with waybill to:
Minuteman International,Inc.
14N845 US Route 20
Pingree Grove, Illinois 60140

Page 4
Table of Contents
1 Safety information ............................................................6
1.1 Safety and Warning Symbols ..............................................6
1.2 General Provisions ...............................................................6
1.3 Provisions for Operation ......................................................7
1.4 Maintenance instructions.....................................................7
1.5 Specifi c Hazards ...................................................................8
1.6 Information for Protection of Environment ........................8
1.7 Labels On The Machine ........................................................9
2 First Operation ................................................................10
2.1 Instruction ...........................................................................10
2.2 Initial Charging Procedure .................................................10
2.3 Before Operation Of Machine ............................................10
2.4 Start Machine ......................................................................10
2.5 Operation .............................................................................10
2.6 Stopping The Machine ........................................................11
2.7 After Work ............................................................................11
2.8 Transport Mode ...................................................................11
2.9 Tie Down Points ..................................................................11
3 Operation.........................................................................12
3.1 Method Of Operation ..........................................................12
3.1.1 Scrub Head Assembly .................................................12
3.1.2 Solution Tank ................................................................12
3.1.3 Squeegee ......................................................................13
3.1.4 Recovery Tank ..............................................................13
3.1.5 Drive System.................................................................13
3.1.6 Batteries and Charger ..................................................13
3.1.7 Options ..........................................................................13
3.2 Control Panel & Operation Indicators ...............................14
3.2.1 Operating Panel ............................................................14
3.2.2 At The Machine .............................................................16
4 Technical Data ................................................................18
5 Maintenance and Care ...................................................20
5.1 General.................................................................................20
5.2 Maintenance Document......................................................21
5.3 Maintenance Schedule .......................................................22
5.4 Battery Systems ..................................................................26
5.4.1 Charging The Batteries ................................................27
5.4.2 Low Discharge Signal Sender (LDS) ..........................27
5.4.3 Removing Batteries......................................................27
5.4.4 Installing Batteries .......................................................27
5.4.5 Disposal of Batteries....................................................27
5.5 Solution Tank ......................................................................28
5.5.1 Filling the Solution Tank ..............................................29
5.5.2 Empty the Solution Tank .............................................29

Page 5
5.5.3 Cleaning Clear Water Filter ........................................29
5.6.1 Empty Recovery Tank ..................................................31
5.6.2 Cleaning the Recovery Tank .......................................31
5.6.3 Clean Suction Filter......................................................31
5.7 Scrub Head .........................................................................32
5.7.1 Cleaning Brushes .........................................................32
5.7.2 Changing Brushes .......................................................32
5.7.3 Changing Defl ector Roller ...........................................32
5.7.4 Changing Scrub Head Skirt ........................................32
5.8 Cylindrical Brush Deck......................................................33
5.8.1 Clean Dirt Hopper .........................................................33
5.8.2 Remove Brushes ..........................................................33
5.8.3 Clean Brushes ..............................................................33
5.8.4 Fit Brushes ..................................................................33
5.8.5 Change Defl ector Roller ..............................................33
5.9 Squeegee ............................................................................34
5.9.1 Cleaning the Squeegee ................................................34
5.9.2 Changing the Squeegee Blades..................................34
5.9.3 Adjusting the Blades Angle Adjustment ....................35

Page 6
1.2 General Provisions
• Apart from the provisions contained
in this instruction manual, the general
safety provisions and the accident
prevention regulations as imposed by
law must be complied with.
• Before operating your machine,
carefully read the instruction manual
as well as other separate instructions
for accessories or attached
implements. Comply with all points
mentioned there during work.
• Only persons trained by qualifi ed
Minuteman personnel are authorized
to operate, service and repair the
machine.
• You are advised to thoroughly study
the safety instructions, this will help in
avoiding errors during operation of the
machine and thus guarantees correct
usage of the machine.
• The operating instructions must be
on hand at the place of machine use,
and therefore have to be kept readily
available at the machine.
• When selling or lending the machine
for rent, hand out these documents to
1 Safety information
1.1 Safety and Warning Symbols
All paragraphs in this manual referring
to your personal safety, the safety of
your machine and the environment protection
are recognized by one of the following
warning symbols:
Symbol Hazardous for ... Description
Warning Persons and Goods
Indicates a hazardous situation
which could result in death or
serious injury.
Note Indicates important or additional
information.
Ecological Hazard The Environment
Indicates the use of substances
representing an inherent danger
to the health of the environment.
NOTICE All
Indicates a potentially
hazardous situation which may
result in equipment or property
damange.

Page 7
the new owner/operator and have
the transfer certifi ed!
• The warning and instruction
plates attached to the machine
contain valuable advice about safe
operation. Immediately replace
incomplete or illegible labels.
• For safety standards spare parts
must be equal to genuine parts!
1.3 Provisions for Operation
• Before the fi rst operation of the
machine, fully charge the battery
with an initial charging procedure
and comply with the operating
instructions of the charger as
well as with those of the battery
manufacturer. Minuteman cannot
be held liable for damages
resulting from the fact that
the initial charging has not or
insuffi ciently done.
• Before operation, check
the machine for operational
safety! Immediately remedy
malfunctions!
• It is necessary for the operator to
get acquainted with all attachments
and controls as well as with their
function before operation begins.
• When operating the machine use
of fi rm and skid proof shoes is
recommended.
• The machine may be used only on
such surfaces clearly specifi ed by the
owner or his authorized representative.
• When operating the machine take
notice of persons within the operation
area especially children.
• Start moving immediately after brush
head has lowered otherwise the brush
might leave traces on the surface.
Lift the brush head before going over
obstacles (doorsteps).
• Empty dirty water tank before folding
recovery tank over.
• Use only cleaning agents suitable for
automatic machines (low-foaming)
and comply with the instructions for
use, disposal and with the warning
information specifi ed by the cleaning
agent’s manufacturer.
• The machine is not designed for
collecting hazardous, infl ammable or
explosive dust or substances.
• Usage of the machine in explosive
areas is prohibited.
• Pull the ignition key to avoid
unauthorized use of the machine.
• Before transporting the machine, lift
the squeegee and the scrub head
assemblies. Adapt operation of
machine to the local conditions.
• The machine may be used only for
operation on plane areas with a
maximum inclination of 2 %.
1.4 Maintenance instructions
• The daily and weekly maintenance
and repair task must be performed
by a qualifi ed operator. For any
maintenance and repair work
beyond this please contact your local
Minuteman service center.
• Observe the maintenance activities
and intervals set out in the instruction
manual.
• Maintenance and repair work
should be carried out with use of the
appropriate tools.
• Have the machine checked for
safety conditions in the sense of the

Page 8
Accident Prevention Regulation
by an expert at regular intervals
recommendation: (at least
once yearly) as well as after
modifi cations or repairs.
• Spare parts must be equal to
the technical requirements as
specifi ed by the manufacturer.
Using genuine spare parts
guarantee compliance with these
requirements.
• Stop engine before proceeding to
inspection and maintenance work.
• To prevent the machine from being
used by unauthorized persons, the
ignition key should be removed.
• When performing work on the
electrical system, be sure to
disconnect the battery plug.
• Make sure to protect the dirty water
tank against accidental closing or
tilting down before working in the
area of a lifted tank lid.
• Do not clean the electrical parts by
means of high-pressure cleaning
equipment.
• The use of aggressive detergents
is not recommended.
• Let the machine dry after cleaning i.e.
for the weekend.
• The machine may become operational
after all protective devices have been
fi tted and positioned.
1.5 Specifi c Hazards
Electric system
• Only use genuine fuses with the
correct rating.
• In case of malfunction of the electrical
system, immediately shutdown
machine and make repairs.
• Only qualifi ed personnel is authorized
to make repairs to this electrical
equipment according to electrical &
technical guidelines
• Inspect/check the electrical equipment
of the machine at regular intervals.
Immediately repair defects such as i.e.
loose connections or scorched cables.
Battery
• Follow the operating instructions of the
battery manufacturer.
• Handling and changing of the batteries
may take place only by maintenance
staff or qualifi ed technician.
• Never place metal objects or tools on
batteries this is a short-circuit hazard!
• Do not change the center of gravity,
only use recommended batteries at the
prescribed position.
• Provide suffi cient ventilation to areas
where batteries are being charged.
• Explosion hazard!
1.6 Information for Protection of
Environment
• Observe the legal directives and local
regulations for disposal of detergents,
see Water Management Act.
• Used batteries labeled as recyclable
contain reusable economic goods.
These batteries must not be added to
the normal waste.

Page 9
1.7 Labels On The Machine
The following safety and information labels
are legibly attached to the machine.
Replace missing or illegible labels
immediately.
Minuteman Decal (Fig. 1/1)
Machine identifi cation number (Fig. 1/2)
Dirty water drain hose (Fig. 1/3)
A = Read and observe the instruction
manual (Fig. 1/2)
B = Maximum inclination of 2 %
(Fig. 1/2)
C = Do not clean the machine by means
of high-pressure cleaning equipment
(Fig. 1/2)
Infl ation Pressure (Fig. 1/4) = 65 psi
Fig.1

Page 10
2 First Operation
2.1 Instruction
Instruction is required before the fi rst
operation. First instruction into handling
of the machine must be held by a
qualifi ed person sent by your local
Minuteman dealer. Your Minuteman
dealer will be informed upon delivery of
the unit and will contact you to make a
date for instruction.
2.2 Initial Charging Procedure
Before fi rst operation of the
machine, fully Charge the
battery with an initial charging
procedure and comply with the
operating instructions of the
charger as well as with those
of the battery manufacturer.
Minuteman cannot be
held liable for damages
resulting from the fact that
the initial charging has not or
insuffi ciently been done.
2.3 Before Operation Of Machine
Perform the following inspections
before operation.
1. Check parking site for signs of leakage.
Hoses, lines and tanks must be free from
any leakage or damage.
2. Install brushes and squeegee, see
maintenance chapter.
3. Install batteries and connect battery
cable, see maintenance chapter.
4. Check battery charge and proceed
to charging of batteries if required.
Generally proceed to initial charging
before fi rst operation of the machine.
5. Empty dirty water Recovery tank and
clean it if required, see maintenance
chapter.
6. Fill clean water tank and add a cleaning
agent according to the manufacturer’s
recommendations.
Use only cleaning agents suitable
for automatic machines (low-
foaming type) and comply with
the instructions for use. Follow
directions for disposal and
warning information as specifi ed
by the manufacturer.
2.4 Start Machine
Before starting the machine, set the
forward/reverse level to neutral position. If
the lever is not in the neutral position when
machine is switched on, an error message
will occur. Use the following
procedure reset the machine into operating
mode:
• Disconnect main plug of the charger from
outlet and fasten to the holder.
• Switch on the machine by turning the
ignition key from position (0) to position (1).
2.5 Operation
1. Turn on the machine via ignition switch.
2. Use hand lever (Fig. 5/3) to lower
squeegee. Vacuum motor turns on
automatically.
3. Switch on clean water supply by solution
switch (Fig. 4/14).
4. Adjust clear water amount by means of
metering switch (Fig. 4/13).
5. Use pedal (Fig. 5/9) to lower brush head.
6. Use forward/reverse lever (Fig. 5/1) to
adjust speed and direction. Increase the
scrub brush pressure if required with pedal
(Fig. 5/10) .

Page 11
Start moving machine
immediately after lowering
the scrub head,otherwise the
brushes may leave traces on
the fl oor. Lift squeegee before
changing to reverse. Lift up
brush head before passing
over dormers and more.
2.6 Stopping The Machine
Releasing the forward/reverse lever it
returns automatically into the neutral
position stopping the machine. This
also protects the machine against
unintentional movements or against
being inadvertently started.
2.7 After Work
1. Park machine on a suitable site for
maintenance.
2. Stop machine, lift squeegee and
scrub head and pull the ignition key.
3. Empty and clean dirty water recovery
tank.
Observe the legal directives
and local regulations for disposal
of detergents, see Water
Management Act.
4. Check clean water fi lter.
5. Check squeegee blades and suction
hose.
6. Check operation function and settings.
7. Charge batteries.
8. Clean the machine.
Empty the clean water solution tank before
shutting down the machine for a long
period of time.
Do not clean the electrical
parts by means of high-pressure
cleaning equipment.
2.8 Transport Mode
When transporting unit to; switch unit on,
lift squeegee and scrub head and actuate
the forward/reverse lever according to the
desired direction of travel and speed.
2.9 Tie Down Points
When transporting unit on a vehicle or
trailer, the machine must be protected
against rolling off . Chock the drive wheel.
Tie the machine down fi rmly to the front
with the eye bolts (Fig. 2/1) and to the rear
by the chassis (Fig. 2/2) .
Fig.2

Page 12
3 Operation
3.1 Method Of Operation
General
The E28/30/33 is a vacuum scrubbing machine for wet
cleaning of hard surfaced fl oors.
3.1.1 Scrub Head Assembly
Lower the scrub head assembly (Fig. 3/1) via pedal
before scrubbing. The brushes will rotate
and the water supply turns on automatically.
When the forward/reverse lever is in the neutral
position & machine is stopped, the scrub brushes
& water supply is switch off automatically. Figure 3
represents the Disc scrub Head type machine.
A Cylindrical Scrub Head machine is also available.
3.1.2 Solution Tank
Fill the solution tank (Fig. 3/2) after folding up the
opening. The solution tank holds approximately
19 gallons and the fi lling level can be seen looking
through the transparent hose. Regulation of water
amount is available via adjustment handle.
Fig.3

Page 13
3.1.3 Squeegee
The movable squeegee (Fig.
3/3) consists of the squeegee lift
handle, the vacuum motor and the
squeegee blades. The dirty water
is cleaned from the fl oor by means
of the squeegee blades. The
Squeegee is lowered via a hand
lever. Simultaneously, the vacuum
motor switches on. The vacuum
motor works independent of travel
direction or if the machine stops. A
second actuation of the lever lifts the
squeegee up again and the vacuum
motor is automatically switched off
with a delay of 15 seconds.
3.1.4 Recovery Tank
The dirty water is moved from the
squeegee to the recovery tank (Fig.
3/4) by a vacuum motor and suction
hose. For cleaning and collecting
water in places where access is
diffi cult, the machine is equipped
with a handheld suction hose.
3.1.5 Drive System
The machine features a continuous drive (Fig. 3/5).
The electronic drive controls travel speed and direction
as well as dynamic braking.
3.1.6 Batteries and Charger
The machine is equipped with maintenance-free 180
Ah batteries (Fig. 3/6), an automatic charger (Fig. 3/7)
and a low discharge signal sender (LDS) for protection
against low discharge.
3.1.7 Options
• Extraction hose including suction pipe, joint nozzle
and wet suction nozzle.
• Mop holder and tool-box for cleaning utensils.
Accessories such as brushes, rollers, pads,
pad holder with centerlock and squeegee
blades are available. Contact your Minuteman
Dealer for more information

Page 14
3.2 Control Panel & Operation Indicators
3.2.1 Operating Panel
1 Display
2 Key Switch
3 Battery Charge Indicator
4 LDS Indicator
5 Symbol for Brush Drive
6 Symbol for Vacuum Motor
7 Hour Meter
8 Symbol for Service Indicator
9 Drive Direction Control (9a) with speed
control knob (9b)and bail handle (9c)
Fig.4
5
18 43
26
7
9a9c 9b

Page 15
LDS Indicator (Fig. 4/4)
Upon switching on, the LDS indicator is
illuminated on the panel to show the current
battery charge condition during operation.
For additional Information see chapter on
maintenance.
Symbol For Scrub Brush (Fig. 4/5)
This symbol appears when the scrub brush
is switched on.
Symbol For Vacuum Motor (Fig. 4/6)
This symbol appears when the vacuum
motor is switched on.
Hour Meter (Fig. 4/7)
When switched on, the hour meter
briefl y displays the software version and the
last error code. Then the current
operating hour level is shown.
Service Indicator (Fig. 4/8)
The service indicator is illuminated after
an occurrence of a system error and
if a cleaning procedure is interrupted.
In addition to the service indicator, a
4-digit code is displayed on the hour
meter.
Drive direction control with speed
control knob and bail handle (Fig/ 4/9)
The drive direction control (9a) is used
to control the driving direction (forward
or reverse). The bail handle must be
pulled in order to drive. The speed can
be adjusted continuously by means of the
speed control knob (9c). The machine
stops when the bail handle is released
(deadman function).
Secure the machine against
rolling away before leaving it
unattended.
Display (Fig. 4/1)
This panel allows centralized monitoring
of functions and status of all
available operating modes.
Key Switch (Fig. 4/2)
The ignition key switch turns the electrical
system on and off .
Pull the ignition key to avoid
unauthorized use of the machine.
A B C D
Battery Charge Indicator (Fig. 4/3)
The battery charge indicator appears on
the panel during the charging procedure
and shows the current charge condition
of batteries during the charging procedure.
The following symbols appear:
Battery symbol A < charge of 20 %
Battery symbol B = charge of 80 %
Battery symbol C = charge of 100 %
Battery symbol D (fl ashes) = error
1. 1. 1. 1.

Page 16
3.2.2 At The Machine
1 Brush deck pedal
2 Opening of solution tank
3 Solution control
4 Sqeegee lever
5 Solution tank fi lter
6 Recovery tank drain hose
7 Solution tank drain hose (Solution level
indicator)
8 Brush ejector
9 Power Cord For Charger
Fig.5
234
6
8
97
5
1

Page 17
Brush deck pedal (Fig. 5/1)
Use this pedal to lift and lower the brush deck.
Opening of solution tank (Fig.5/2)
The solution tank is fi lled after folding up the opening.
Solution control (Fig. 5/3)
The squeegee water supply is regulated by a hand
valve. The solution fl ow can be regulated between 0
gal/min and 0.9 gal/min.
Squeegee Lever (Fig. 5/4)
Use the hand lever to lift and lower the squeegee.
This will deactivate or activate the vacuum motor.
Solution tank fi lter (Fig. 5/5)
While solution fl ows from tank to brush deck, it is
cleaned by the fi lter element.
Recovery tank drain hose (Fig. 5/6)
This hose allows draining of the collected soiled water
from the tank.
Solution tank drain hose (Fig.5/7)
This hose allows draining of the solution tank.
Brush ejector (Fig. 5/8)
The brush ejector makes brush removal fast and
easy.
Power cord for charger (Fig. 5/9)
The pwer cord supplies the charger unit with
power.

Page 18
4 Technical Data
*Add 7.3 kgs / 16 lbs for Gel Batteries

Page 19
Noise emission
The sound pressure level measured under maximum conditions of use (LwA) according
to DIN EN 60335-2-72 amounts to:
The sound pressure level measured (at the ear of the driver) under normal conditions
of use (LpA) according to DIN EN 60335-2-72 amounts to:
Measurement inaccuracy (KpA):
dB(A) 82
dB(A) 67
dB(A) 1.6
Vibration
The frequency weighted acceleration measured according to DIN EN ISO 5349 which
have an eff ect upon the upper limbs (hand-arm-system) amounts under normal working
conditions:
m/s² < 0.8

Page 20
5 Maintenance and Care
5.1 General
Before performing
maintenance you are
advised to read and
comply with the Safety
Information chapter!
Compliance with the recommended
maintenance work schedule will give you
the certitude of always having a reliable
machine.
Daily or weekly maintenance and repair
may be executed by the driver/operator
having been trained accordingly.
Minuteman system maintenance work
must be executed by qualifi ed personnel
only. Please contact your local
Minuteman Service Center or Minuteman
contract dealer. Minuteman cannot be
held liable for damages resulting from
non-compliance with these instructions.
Please indicate the machine’s serial
number with any inquiry or spare parts
order, see paragraph 1.7 - Labels at the
MachineNameplate.
Minuteman System Maintenance I :
(every 125 hours of operation)
To be performed by qualifi ed personnel
of an authorized Minuteman Service Center
in accordance with the machine-specifi c
system maintenance including spare
parts kit.
Minuteman System Maintenance II:
(every 250 hours of operation)
To be performed by qualifi ed personnel
of an authorized Minuteman Service
Center in accordance with the machine-
specifi c system maintenance including
spare parts kit.
Minuteman System Maintenance S:
(every 500 hours of operation safety check)
To be performed by an qualifi ed personnel
of authorized Minuteman Service Center
in accordance with the machine-specifi c
system maintenance including spare parts
kit.
5.1 Minuteman System Maintenance
The Minuteman System Maintenance:
• Guarantees reliable operability of the
Minuteman machines (Preventive
maintenance)
• Minimizes operating costs, repair cdosts
and maintenance costs
• Ensures long service life and operability
of the machine
The Minuteman System of Maintenance is
structured in separate modules and
determines specifi c technical works to be
executed as well as the intervals for
such maintenance. For any specifi c
maintenance type, the replacement
parts are determined and listed in spare
part kits.
Minuteman System Maintenance K:
To be performed by the customer in
accordance to the maintenance and care
instructions contained in the operating
instruction manual (daily or weekly). The
driver/operator will be instructed upon
delivery of the machine.