Minuteman Max Ride MR20ECO User manual

For:
Training
Troubleshooting
Adjustments
SERVICE MANUAL
For Max Ride Models:
Generation 1
MR20ECO, MR20S,
MR26ECO, MR26S,
Generation 2
A-MR20ECO, A-MR20S,
A-MR26ECO and A-MR26S
Rev 02/17/2019
Generation 2
Generation 1

Page 2
Contents
1 Safety Page 4
2 3 Maintenance Intervals Page 5
3.1 Minuteman System Maintenance K (Customer) Page 6
3.2 Minuteman System Maintenance I (125 hours of operation) Page 7
3.3 Minuteman System Maintenance II (250 hours of operation) Page 8
3.4 Minuteman System Maintenance S (500 hours of operation, at least yearly) Page 9
4 Lubrication Page 10
5 Battery Charger Settings Page 11
6 Battery Charge Fault Codes Page 13
7 Battery Trouble shooting Page 15
8 Electric Brake By-pass (Generation 1 only) Page 16
9 Replacing Squeegee Blades Page 17
10 Squeegee Wheel Adjustment Page 18

11 Maintaining the Recovery Float/filter Page 19
12 In Line Solution Filter and Valve (Generation 1) Page 20
13 In Line Solution Filter and Valve (Generation 2) Page 21
14 Switches (Generation 1 Only) Page 22
15 Drive Controller Error Codes Page 23
16 Seat Switch Contact Plates (No Drive Function) Page 25
17 Adding Brush Deck Skirt On MR20D (Generation 1 Only) Page 26
18 Wiring Diagram Gen 1 Only (Includes Sport Models) Page 27
22 Wiring Diagram Gen 2 (ECO Version Only) Page 28
23 Wiring Diagram Gen 2 (Sport Version Only) Page 29
Page 3
Contents Continued

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 4

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 5

3.1 Minuteman System Maintenance K
Page 6
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 7

3.3 Minuteman System Maintenance II
Page 8

3.4 Minuteman System Maintenance S
Page 9

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.
4. Lubrication
Page 10

5. Setting the Charger Battery Type
(957760 & 957761 Charger only)
Page 11
Instructions
Remove the rear metal panel on the machine.
2. Remove the 957761 charger completely from the machine.
3. Locate the rubber plug on the bottom right side of the charger.
4. Remove the rubber plug.
5. Locate the selector switch.
6. Use a small flat tip screw driver to turn the red indicator to the desired
setting. See the chart below.
7. Replace the rubber plug and install charger into the machine.
Switch Position Battery Type
1All Wet Flooded Lead Acid 95 to 115 AH (Group 27)
1 AGM Maintenance Free Part # 956100 (95 AH) (OEM only)
2All Wet Flooded Lead Acid 130 to 140 AH (Group 31)
2 AGM Maintenance Free Part # 956135 (135 AH) (OEM only)
3GEL/AGM (NON OEM) 135 amp hr
4GEL/AGM (NON OEM) 95 to 100 AH and Trojan AGM 102 (AH) hr. Minuteman Part # 956157
Note: These are the only settings available. For non OEM batteries, please contact supplier for the charging
requirements. Select from the list above.
The remaining settings do not have any additional functions.

Remove the rubber plug on the end of the charger.
Turn the red selector with small flat tip screw driver to the desired setting.
Bottom view with plug Bottom with plug removed Selector Switch close up
5.Seting the Charger Battery Type Cont.
Page 12

6. Battery Charger Error Codes
Faults are displayed red LED on the battery charge indicator.
RED LED BLINKS ONCE AND REPEATS: OUTPUT CONNECTION ERROR.
1. Check for loose or corroded connections between the charger and the batteries.
2. The output may be shorted due to improper connection to the batteries or pinched wires.
3. The output may be connected in reverse polarity to the batteries.
4. The battery voltage may be too high (higher than a 24V battery pack).
This condition can also occur, if the charger is restarted immediately after charging.
Allow batteries to cool down before restarting the charger.
Note: The charger is not damaged by any of these problems except when connected to
Batteries totaling 48 volts or more.
RED LED BLINKS TWICE: CHARGER HAS TIMED-OUT
The charging progress timer has elapsed before charging was complete and charger has
stopped charging. Possible causes:
1. The batteries are extremely discharged – Unplug the AC cord connection for 30 seconds
minimum. Let batteries cool down if hot. Reconnect the AC cord to start a new charge cycle.
2. The electrolyte is low in one or more cells – Correct by adding distilled water.
3. Batteries are weak, old, or have one or more bad cells. Batteries will still charge but capacity
will be reduced. Replace the batteries, if needed.
4. If batteries are new, the batteries may need to be conditioned by charging and discharging them.
Some batteries may need to be cycled several times in order to condition them to their full potential. Page 13

Faults are displayed red LED on the battery charge indicator cont.
All Three lights blink at the same time
1. Charger is restarting
2. Charger is unable to put full output to the batteries
3. Possible loose or poor connections. Check all connections.
4. Batteries may need to be conditioned by charging and discharging them. Some batteries
may need to be cycled several times in order to condition them to their full potential.
6. Battery Charger Error Codes Continued
Page 14

•The greater the variation between cells in any one battery, the greater loss of running time.
A battery with variations of .040 or greater should be replaced.
•The variation of .020 is considered normal.
•Specific Gravity Readings are as follows:
1.280 and above 100% charged cell
1.235 to 1.240 = 75% charged cell
1.190 to 1.195 = 50% charged cell
1.150 to 1.175 = 25% charged cell
1.140 or less = 0% charged cell
•Load test the batteries with a battery load tester.
•The voltage difference should be less that 1 volt, when testing under load.
Any battery that has 1 or more volt(s) less than the other should be replaced.
7. Battery Trouble Shooting
(Excessive Gassing or Water Consumption in Batteries)
Page 15
1. If the charger appears to be charging and excessive gassing or water
consumption had been or is occurring in the batteries.
2. Check the following:
3. A. Have the batteries been maintained on a consistent basis? Failure to maintain batteries will
shorten their life and reduce their performance.
B. Test the batteries with a hydrometer. The batteries should be fully charged and cooled for 2
hours after charging, before testing. Top the batteries off with distilled water prior to charging, if
needed. Do not over fill.
C. Compare the cell readings of all the cells in each battery.

8.Electric Brake By-pass Switch (Gen 1)
Applies to Gen 1 versions only, Models MR20ECO, MR20S, MR26ECO and MR26S.
The by-pass switch allows you to release electric brake, the machine can be manually
moved if drive circuit is non functional. Battery power is required.
If the machine is powered up in the manual released position, the code 9 (9 bar flash) will
appear on the battery status LED indicator. The drive system will be disabled.
Turn the brake by-pass switch off and restart the machine.
Page 16

9. Squeegee Blade Replacement on Gen 1
Changing the Squeegee Blades
Check the inner and outer squeegee blades on the squeegee (A) weekly for signs of wear. The
squeegee blades can be reused by removing them and flipping over them (can be turned for 2
total uses). It is generally easier to remove the squeegee with the brush deck in the raised
position.
1. Pull off the suction hose, loosen the two 3-sided knobs (B) and remove the squeegee.
2. Unlock the fastening devices on the inside and outside squeegees as shown.
Page 17

10.Squeegee Height Adjustment
Adjusting the Squeegee Blades Height Adjustment
• If streaks are present, the clearance between the caster wheels and floor must be adjusted
by tightening, or loosening the nut above the bracket that holds the caster as shown in
Figure A. Figure B shows optimal flare of the squeegee for best results.
Page 18
Figure A Figure B

11. Maintaining the Recovery Float (all Versions)
• Screened Float If the recovery tank is overfilled or a large amount of foaming is present, the screened
float blocks the vacuum intake inside the tank protecting the vacuum motor and internal electronics
from water damage. It is essential to keep the float in working order through regular maintenance. The
float should be cleaned daily by thoroughly rinsing with a hose.
• Screened Float Removal The screened float is positioned inside the recovery tank
• WARNING: Damage to the machine may occur if operated without the screened float properly in place.
Removal of the screened float is not necessary for daily maintenance.
The float/screen cage can
be removed for cleaning,
without removing the
screws
Page 19

12. In-line Solution Screen and Valve
(Generation 1)
The solution solenoid, which shuts off solution flow is protected from debris by the in-line filter
assembly. The filter assembly is located on the under-carriage of the machine on the left hand
side, just under the solution tank. It is important to check and clean the screened washer inside
the assembly regularly to ensure proper solution flow. Before cleaning, lift the scrub deck lift
lever to the fully raised position. To open, pull the blue shut off handle to the closed position (A),
then unscrew the screen assembly (B). Remove the screen and rinse, reinsert and screw
assembly together, tightening by hand. Overtightening with tools may damage the plastic
threads.
Note: The valve (A) can also be used to control water volume.
Manual control valve ( C )
A
BPage 20