Minuteman E20S User manual

All E17BD, E17TD, E20S, E20BD, E20TD,
E20C, H20BD, H20TD E26ECOS and
E26ECO Automatic Scrubbers
Service Manual
For:
Training
Troubleshooting
Adjustments
Revised 02/10/2019

Contents
1 Safety Page 5
2 Technical Specifications Page 6
2.1 Dimensions E17BD & E20BD Page 7
2.2 Dimensions E17TD & E20TD Page 8
3 Maintenance Intervals Page 9
3.1 Customer Maintenance Page 10
3.2 Maintenance I after every 125 hours of operation Page 11
3.3 Maintenance II after every 250 hours of operation Page 12
3.4 Maintenance S after every 500 hours of operation Page 13
4 Batteries and Wiring Page 14
5 Recovery Float and Gasket Page 15
6 Lubrication Page 16
7 Charge Indicator Version 1 Page 17
8 On Board Chargers (957760 and 957761) (Ver. 1 & 2) Page 18
8.1 Programming the 957745 Charger Page 19
8.2 Charger Settings (957745) Page 20
8.3 Battery Charger Trouble Shooting Page 21
8.4 Battery Charger Error Codes 957745 (Ver. 1) Page 25
8.5 Programming The 957760 & 957761 Charger (Ver. 2) Page 26
8.6 Charger Error Codes 957760 & 957761 Page 27

Contents
8.7 Prime Chargers Page 29
8.8 Prime Charging Status Indicator Page 30
8.9 Prime Charger Fault Codes Page 31
9 Battery and Error Code Indicator Page 32
9.1 E17TD and E20TD Error Codes Page 33
10 Trouble Brush Motor Controller (Sport only) Page 38
11 Squeegee Adjustment (Curved) Page 39
11.1 Squeegee Adjustment Page 40
11.2 Squeegee Caster Adjustment Page 41
11.3 Squeegee Caster Adjustment Page 42
11.4 Squeegee Caster Adjustment Page 43
12 Maintaining Deep Cycle Wet Batteries Page 44
13 Load Testing The Batteries Page 46
14 Hydrometer Testing Page 47
15 Transporting the Machine Page 50
16 Key Switch Page 51
17 Solution Filter (new and old) Page 52
18 Testing the Main Power Relay Page 54

19. Trouble Shooting the Drive Circuit Page 59
19.1 Trouble Shooting The Traction Drive Switch Page 60
19.2 Trouble Shooting – Vacuum Motor Circuit Page 61
19.3 Trouble Shooting – Vacuum Relay Page 62
19.4 Testing the Drive System Potentiometer Page 63
20 Notes Page 64
Contents

1. Stop the machine only on level surfaces.
2. Avoid moving parts. Do not wear loose jackets, shirts, or
sleeves when working on machine.
3. 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 the batteries.
4. Do not clean machine with a pressure washer.
5. Only authorized personnel should perform repairs and
maintenance.
6. Use only Minuteman genuine replacement parts.
8. Do not use machine around flammable substances.
9. The batteries should be charged only in well ventilated areas.
10.Always disconnect the battery pack from the machine and the
A.C cord the from outlet, when servicing the machine.
1. Safety
Page 5

2. Technical Specifications
E17BD, E20
Page 6

2.1 Dimensions E17BD & E20 BD
With a Straight Squeegee
Page 7

2.2 Dimensions (E17 & E20)
With Curved Squeegee
Page 8

3. Maintenance Intervals
•Maintenance Intervals:
In a modular structure, the Minuteman System Maintenance determines the specific
technical proceedures to be preformed and sets the time interval between the two
maintenance cycles.
For each of the maintenance cycle, the replaceable parts are determined as well.
Further details described in the specific chapters.
•Minuteman System Maintenance K:
To be performed by the customer (in daily or weekly intervals) according to the maintenance
and care instructions as specified in the operating instructions.
The operator must be professionally instructed after delivery of the machine by selling
dealer.
•Minuteman System Maintenance I: (after every 125 hours of operation)
To be preformed an authorized Minuteman Service Center in accordance with the machine-
specific system maintenance.
•Minuteman System Maintenance II: (after every 250 hours of operation)
To be preformed an authorized Minuteman Service Center in accordance with the machine-
specific system maintenance.
•Minuteman System Maintenance S: (after every 500 hours of operation, safety check) To
be performed by an authorized Minuteman Service Center in accordance with the machine-
specific system maintenance.
Page 9

3.1 Minuteman System Maintenance K
Page 10
To be performed by the customer/user Interval
Daily Weekly
Fill the clean water tank and mix the proper amount and type of cleaning solution. O
Charger the batteries. O
Check the brush head, Clean if needed with a damp cloth. Do not get water inside
the motor. O
Check the squeegee, clean if needed O
Check the lid gasket on the recovery tank. O
Empty and flush the recovery tank with clean water. O
Clean the filter/float inside the recovery tank. O
Check the water levels of all the batteries. Add distilled water, if needed. Do not
over fill. O
Check the pads and brushes for wear. Replace if needed. O
Check the squeegee hose for clogs, damage and wear. Replace if needed O
Check the squeegee rubbers for cuts and wear. Flip the blade(s) over or replace. O
Check the solution filter. Clean if needed. O
Flush the clean water solution tank with warm water. O
Test all the functions of the machine. O

3.2 Minuteman System Maintenance I
Page 11

3.3 Minuteman System Maintenance II
Page 12

3.4 Minuteman System Maintenance S
Page 13

4. Batteries & Wiring
•Battery Compartment
•The battery compartment is located under the
recovery tank. The battery compartment can be
accessed for servicing and maintenance by tilting the
recovery tank. Make sure the recovery tank is has
been drained before tilting.
•The battery compartment contains two 12 volt
batteries connected in series.
•Connect the batteries according the battery wiring
diagram to the right.
•The recommended batteries are two 12 volt, 115 Ah
deep cycle battery part number 956712 for the Wet
Lead Acid type or 12 volt 100Ah AGM Maintenance
Free is part number 956100. Do not use Automotive
or Marine type batteries.
•When changing the type of battery (going to Gel from
Wet Lead Acid or visa versa) the battery charger will
need to be programmed accordingly. See Section 8.1
on Programming the Charger.
Page 14

5. Recovery Float
•The Recovery Float and Filter is located inside of the tank,
•The filter should be checked after each use and cleaned if needed.
•Remove the three screws and the cover, to access screen float for more extensive cleaning.
•Failure to do so will reduce the vacuum performance of the machine.
•Using the machine without it in place or picking up dry material will damage the vacuum
motor.
3 screws
cover
screen/float
Page 15

Regularly scheduled lubrication of certain machine parts should
be performed to insure trouble-free
operation of the machine. Apply a generous amount of grease
into the fittings on the machine until grease
seeps out around the bearings. Wipe excessive grease off with
a towel.
The grease points are listed below:
1. Rear squeegee caster wheel axle (2)
2. Rear squeegee caster swivel (2)
Apply lubricant to:
1. The rear squeegee pivot points
2. The scrub deck linkages.
6. Lubrication
Page 16

7. Charging Indicator (Version 1)
Charge Indicator
•The indicator will light during the
charging process.
•The red light indicates, the
batteries need a full charge.
•The yellow light indicates, the
batteries have received 80% of
their charge.
•The green light indicates, the
batteries are fully charged.
•The red light is flashing, indicates
the charger has detected a fault in
the batteries. (See Section 8.6)
Applies to the 957760 and 957761
chargers only. Page 17

8. On Board Chargers (Version 1 and 2)
•The Minuteman on board chargers are capable of being programmed to charge lead acid
wet or gel type maintenance free batteries.
•The on board charger has a variety of other programming settings.
•Use caution when making changes. Incorrect settings may cause the charger to
malfunction and or damage the batteries.
•The 957745 charger (on left) has a series of dip switches located under the front decal that
can be used to change the settings.
•The 957760 and 957761 chargers (on right) has a accessible rotary switch at the bottom of
the charger.
957745 Charger 957760 & 957761 Chargers Page 18

8.1 Programming the 957745 Charger
1. Remove the large rear metal cover on rear the machine.
2. Locate the battery charger.
3. To access the Dip Switches, carefully peal the decal back on the front of the
charger. Start at the bottom left side and peal up. (Removing the plastic charger
cover is not necessary.) Use caution not to damage the decal.
4. There is a series of eight Dip Switches located under the decal.
5. Each switch is numbered 1 through 8.
Dip Switches 1 to 4 are for setting the type of battery.
Type of Battery Switch 1 Switch 2 Switch 3 Switch 4
Lead Acid Wet Batteries ON ON OFF ON
AGM ON OFF OFF ON
Gel and Maintenance Free ON OFF OFF ON
Page 19

Current (Amperage Output) Switch 5 Switch 6 Switch 7
4 AMPS ON ON NA
8 AMPS OFF ON NA
10 AMPS ON OFF NA
12 AMPS OFF OFF ON
The dip Switches 5,6 and 7 are for selecting the amperage output of the
charger. Use the 12 amp. setting only. * Note: The dip switch # 7 does not
have any function at this time.
Dip Switch 8 is to select the output voltage, either 12 or 24 volt. Use the
24 volt setting only.
Voltage Output Switch 8
12 Volts ON
24 Volts OFF
8.2 Charger Settings (957745)
Page 20