Minuteman MC20115 Guide

Model:
MC20115
MC20230
MC20230CE
OPERATION SERVICE PARTS CARE
200 Floor
Scrubber
Electric
Revised 8/03

TABLE OF CONTENTS
Page
Safety Instructions ............................................. 1
Electrical Requirements ................................... 2
Control Panel Identification ................................ 3
Brush Installation Instructions ............................. 4
Operating Instructions/Maintenance ................... 5
Main Polyethylene Components ........................ 6 - 7
Solution/Recovery Tank ..................................... 8 - 9
Vacuum Components ........................................ 10 - 11
Brush Drive Assemblies .................................... 12 - 13
Back Panel ....................................................... 14 - 15
Squeegee Assembly ......................................... 16 - 17
Wiring Diagram................................................. 18

1
FOR COMMERCIAL USE ONLY
IMPORTANT SAFETY INSTRUCTIONS
When using an electrical appliance, basic precautions should always be followed, including the
following:
READ ALL INSTRUCTIONS BEFORE USING
WARNING - To reduce the risk of fire, electric shock, or injury:
Do not leave appliance when plugged in. Unplug from outlet when not in use and before servicing,
cleaning or maintaining.
WARNING
To reduce the risk of electric shock - Do not expose to rain. Store indoors.
•Do not allow to be used as a toy. Close attention is necessary when used by or near children.
•This machine shall be used only by instructed and authorized persons.
•Use only as described in this manual. Use only manufacturer’s recommended attachments.
•Inspect cord regularly. Do not use with damaged cord or plug. If appliance is not working as it
should, has been dropped, damaged, left outdoors, or dropped into water, return it to a service
center. Use only cord specified by manufacturer.
•Do not pull or carry by cord, use cord as a handle, close a door on cord, or pull cord around sharp
edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces.
•Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
•Do not handle plug or appliance with wet hands.
•Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint,
hair, and anything that may reduce airflow.
•Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
•Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
•Do not use without dustbag and/or filters in place.
•Turn off all controls before unplugging.
•Use extra care when cleaning on stairs.
•Do not use to pick up flammable or combustible liquids such as gasoline or use in areas they may
be present.
•Connect to a properly grounded outlet only. See grounding instructions.
•This machine is not suitable for picking up hazardous dust.
•Close tank and lid before use.
SAVE THESE INSTRUCTIONS

2
INSPECTION
Carefully unpack and inspect your machine for shipping damage. Each unit is tested and thoroughly
inspected before shipment and any damage is the responsibility of the delivering carrier who should
be notified immediately.
WARNING
• Read Instruction Manual before operating this piece of equipment.
• To reduce the risk of fire, use only commercially available floor cleaners and waxes intended for
machine application.
• To reduce the risk of electrical shock, do not expose to rain. Store indoors.
• Do not cross over supply cord, hazard exists when rotating brush passes over cord.
• Electrical motors and components can cause an explosion when operated near volatile materials
and vapors. Do not use this machine near flammable materials such as solvents, thinners, fuels,
grain dust, etc.
ELECTRICAL
(Model MC20115) This floor machine is designed to operate on a standard 15 amp. 120 volt, 60 hz,
AC circuit. Voltages below 105 volt AC or above 125 volts AC could cause serious damage to the
motor.
(Model MC20230) This machine is designed to operate on a standard 16 amp type L fused 230 volt,
50 hz, AC circuit. Voltages below 200 volts AC or above 250 volts AC could cause serious damage
to the motor I.E.C. Class 1.
GROUNDING INSTRUCTIONS
• This floor finishing machine should be grounded while in use to protect the operator from electric
shock. The machine is equipped with a three-prong grounding type attachment plug to fit the proper
grounding type receptacle. The green (or green and yellow) conductor in the cord is the grounding
wire. Never connect this wire to other than the grounding blade.
• Floor finishing machines rated less than 150 volts — If the machine is provided with an attachment
plug as shown in Sketch A it is intended for use on a 120-volt (nominal) circuit. If a properly grounded
receptacle as shown in Sketch A is not available, an adapter as shown in Sketch C is available and
should be installed as shown in Sketch B if the outlet box that houses the receptacle is grounded.
Be sure to fasten the grounding tab with the faceplate screw.

3
1. Vacuum switch 7. Foot pedal for lower/raising brush
2. Squeegee lift lever 8. Squeegee
3. Brush switch 9. Squeegee pitch control
4. Solution control lever 10. Recovery hose
5. Power connection cable 11. Recovery tank dump hose
6. Power assist control 12. Solution tank dump hose
SQUEEGEE PITCH CONTROL ADJUSTMENTS
Some minor adjustments may be required due to floor
types and conditions to extend downward travel. Remove
clevis pin (3) and unscrew yoke (1) from cable (2). To
adjust pitch (angle) of squeegee, loosen bolts (5) and
knobs (4). Squeegee angular position can now be
changed for best performance.

4
BRUSH INSTALLATION - REMOVAL
INSTALLATION - Figure 1
1. Disconnect power cable (mains) from machine.
2. Set brush assist lever (A) to rabbit.
3. Raise brush mechanism (B) to the “up” position by depressing pedal downward as shown.
4. Remove side skirt (C) by lifting up and away.
5. Center brush (D) under machine as shown lining up center
hex drive hub.
6. By releasing foot pedal (B) to lower brush mechanism, drive hub will engage.
REMOVAL - Figure 2
1. Disconnect power cable (mains) from machine.
2. Set brush assist lever (A) to rabbit.
3. Raise brush mechanism (B) to “up” position by depressing pedal downward as shown.
4. Remove side skirt (C) by lifting up and away.
5. Brush has snap-on push-off clutch plate. By pushing brush away from machine and from side it
will release brush assembly.
Fig. 1 Fig. 2

5
OPERATING INSTRUCTIONS
1. Filling: Fill the solution tank with the desired amount of water and add liquid cleaning solution to
the proper dilution ratio. DO NOT USE powdered cleaning chemicals. Powders are unlikely to
dissolve thoroughly, resulting in clogging the in-line solution filter. This can reduce or stop water
flow to the brush.
2. Lower brush assembly.
- To lower the brush, first push the pedal slightly towards the center of the machine
(unlock it), then release it slowly.
- To lift the brush, press the pedal down until lift mechanism engages.
3. Turn on brush switch.
4. Adjust solution control feed lever.
5. Turn on vacuum switch.
6. Lower squeegee assembly.
After Use:
1. Turn off solution feed.
2. Switch off brush and raise.
3. Raise squeegee assembly.
4. Turn off vacuum motor.
Solution and recovery tanks should be emptied after every use.
MAINTENANCE: Unplug from outlet before servicing.
Daily 1. Clean float assembly & squeegee blades.
Monthly 1. Check wear on squeegee blades.
2. Grease rear wheels.
3. Grease pivot points on brush motor assembly.
Every 500 hours check condition of carbon brushes on vacuum motor and
brush drive motor.

6

7
Parts List
Item Part No. Qty. Description
1 210002 1 Lid Assembly Recovery
2 210001MCH 1 20" Solution/Recovery Tank Assembly
3 210000MCH 1 20" Base Assembly
4 210004 1 Recovery Dome
5 210006 2 Lid Gasket
6 210007 2 Lid Gasket
7 712565 10 SCR-MC 1/4-20 x .62 SS
8 711106 25 SCR-ST-A 10 x .75 PL
9 430044MCH 2 Hinge Lid 20"
10 712810 4 SCR-MC 10-24 x .37 STPL
11 712536 6 SCR-MC 10-24 x .62 SS TH
12 210005 1 Dome Gasket
13 260087 1 Hinge
14 450066 1 Solution Tank Cover
15 210055 1 Side Skirt Retainer
16 210052 1 Splash Skirt
17 210056 1 Skirt Retainer Front
18 210053 1 Skirt at Access Panel
19 210057 1 Skirt Retainer at Access Panel
20 210058 1 Skirt Retainer at Wheel
21 210054 1 Skirt at Wheel
22 210059 1 Access Panel
23 833214 1 Knob 3-Sided
24 450062 1 Cord, Nylon
25 210061 1 Pocket Pull
26 430126 2 Hinge Backing Plate
27 715089 1 Decal “200”
28 715060 1 Decal “Minuteman”
29 712822 5 No. 10-24 x .50 Lg. Screw
30 712900 5 Nut-Hex 10-24 STPL
31 210063 1 Access Panel Hanger
32 210027 2 Magnetic Catch
33 833463 1 Titl. Cable
34 712042 1 5/16-18 x .62 Wizz Bolt HH
35 711533 5 WSR-Internal Lock #10
36 712540 6 SCR-MC 10-24 x .37 SS TR
37 210077 1 Skirt
38 210078 1 Retainer
39 711104 3 SCR-ST 10 x .50

8

9
Item Part No. Qty. Description
1 130118 1 Solution Strainer M3-40
2 210068 1 Vac Recover Hose 34.5 C/L
3 210001MCH 1 Sol/Recovery Tank Assembly
4 833254 2 Bumper Wheel Axle
5 832949 2 U-Bracket Wheel Mount
6 430041 1 Float Housing
7 430050 1 Filter Screen 4 x 4
8 430058 1 Sol. Valve Cable Mount
9 430089 1 Float
10 430090 1 Float Valve Weldment
11 450056 1 Solution Hose Nylon 21"
12 210073 1 Solution Dump Hose Nylon 41"
13 210009 1 Standpipe Assembly
14 833316 1 Drain Plug 1 1/4
15 210069 1 Black Drain Hose 32"
16 450040 1 Elbow Plt. 3/8 MPT x 3/8 Barb
17 450059 1 Brass Bulkhead Fitting
18 450076 2 Crimp Clamp SS 185R
19 450081 3 WSR SS 1.908 x 2.41 x .03
20 711124 1 SCR-ST-B 10 x .37 NI
21 710353 2 SCR-MC 10-32 x .37 ST PL
22 710985 2 SCR-SC 3/8-16 x .62
23 711504 1 WSR-Flat 1/4 ID SS
24 711594 1 WSR-Flat .56 x .88 x .03 NI
25 712092 1 SCR Nylon 1/4-20 x 2.5
26 712567 1 SCR-MC 1/4-20 x 2.00 SS
27 712569 1 SCR-MC 1/4-20 x 1.50 SS
28 712665 1 Nut-Hex 1/4-20 SS
29 712667 2 Nut-Hex 1/4-20 SS NYLOC
30 210045 1 Solution Control Cable
31 450083 1 Hose Adapter
32 760220MCH 1 1.5 Adapter MCH (833310)
33 760245 1 Hose Clamp 62P24
34 760343 1 Tube Hose 24/32B
35 832896 2 Guide Wheel
36 762384 2 Bushing .277 x .375 x .37
37 809413 1 Valve Solution
38 828970 3 WSR Neop 1.81 x 2.37 x .9
39 828971 1 Nut 1 1/2 Pipe Thread
40 828975 1 WSR Neop .75 x 1.5 x .90
41 833473 1 Hose Barn 1/4 FPT x 3/8 Barb
42 832326 1 O Ring
43 260183 1 1/4” NPT Plastic Nut
Parts List

10

11
Parts List
Item Part No. Qty. Description
1 250041 1 Seal, Rubber .12 x .62 x 14.5
2 270249 2 Hose Clamp
3 290017 1 Gasket, 4.31 x 5.81 x .19
4 430018 3 Z Bracket
5 762333 2 Caster 3.5"
6 210010 1 Caster Mtg. Brkt.
7 210003 2 8" Wheel
8 430069 1 Vacuum Manifold Assembly
9 828301 1 Spring Squeegee Pressure
10 210074 1 Vacuum Hose 1.5 x 31 C/L
11 430148 1 Sleeve
12 460019 1 Gasket 3.75 x 5.75 x .75
13 710178 2 SCR-MC 1/4-20 x .50 STPL
14 710182 3 SCR-MC 1/4-20 x 1.00
15 711106 9 SCR-ST-A 10 x .75 PL
16 711437 1 Nut-Hex 1/2-13 NIPL
17 711231 4 BLT-HH 5/16-18 x 1.25 STPL
18 711243 5 BLT-HH 3/8-167 x 1.5 STPL
19 711380 8 Nut-Nyloc 3/8-16
20 711425 3 Nut-Flanged Wizz 1/4-20
21 711510 2 WSR-Flat .5 x 1.37 x .10
22 711506 4 WSR-Flat 5/16 STPL
23 711509 6 WSR-Flat 1/2 STPL
24 711517 4 WSR-Flat .77 x 1.37 x .03
25 711515 6 WSR-Flat .44 x .87 x .07
26 710874 2 SCR-SC 1/2 x 13 x 3.75
27 740429 1 Vac Motor 115V Model
27A 741030 1 Vac Motor 240V Model
28 710180 8 SCR-MC 1/4-20 x .75
29 760859 1 Hose Clamp
30 210075 1 Hose Rubber Flex 2 x 15"
31 801013 1 Sleeve, Hose
32 832136 1 Nylon Sleeve Solution Feed
33A 381041 1 Strata-Grit Brush
33B 381040 1 Poly-Grit Brush
33C 381039 1 Nylon Brush Assembly Complete
33D 381038 1 Pad Holder
34 430145 1 Pressure Adjust Rod
35 364-816 1 Nut-Nyloc 1/2-13 Half
36 711505 11 WSR-Flat 1/4
37 711512 1 WSR-Flat .75 x 1.37 x .08
38 828264 1 Washer Cup
39 711160 3 #10 Hi/Lo Screw x .63
40 380064 1 Foam Ring
41 840011 1 Vac Motor Cover, Top
42 840012 1 Vac Motor Cover, Bottom
43 210098 1 Reinforcing Bracket
44 711244 1 BLT-HH 3/8-16 x 1.75
45 711204 1 BLT-HH ¼-20 x .75
46 711373 1 Nut-Nyloc ¼-20

12

13
Parts List
Item Part No. Qty. Description
1 100000 1 Mounting Brkt. Quick Disc 2 210042 1 Motor Mount Weldment 3 210110 1 Motor Brkt. Weldment 5 210039 1 Lift Lever Weldment 6 430019 1 Speed Control Weldment 7 430022 1 Control Pivot Weldment 8 210030 1 Speed Control Rod 9 430026 1 Speed Control Weldment
10 210126 1 Mounting Plate Weldment
11 430035 1 Drive Hub
12 210035 1 Spring, Extension 13 430054 1 Pivot Cam 14 430055 1 Threaded Connecting Rod 15 430056 1 Compression Spring 16 711579 1 WSR-Flat .56 x 1.00 17 711420 1 Nut-Hex Jam 5/16-18 STPL 18 210016 1 Wheel Mount Strut Right 19 210011 1 Mtg. Plate Wheel Carriage 20 712667 6 Nut-Hex ¼-20 SS 21 210455 1 Squeegee Mechanism Complete 22 430080 2 Balljoint (SP1002) 23 210015 1 Wheel Mount Strut Left 24 210047 1 Die Spring 25 210073 1 Solution Dump Hose, Nylon 41" 26 430106 2 Stabilizer Bar Lower 27 711509 1 WSR-Flat 1/2 28 430114 1 Nylon Cap 1/4 FPT HC4 29 430118 1 Clear Dump Hose C/L 24" 30 450076 2 Crimp Clamp SS 185R 31 710986 5 SCR-SC 3/8-16 x 1.00 STPL 32 711202 10 BLT-HH 1/4-20 x .50 STPL 33 712564 2 BLT-HH ¼-20 x 1.00 34 712566 2 BLT-HH ¼-20 x 1.25 35 712683 2 Nut-Nyloc 5/16-18 SS 36 712761 2 WSR-Flat .28 x 1.25 x .059 SS 37 711328 2 Nut-Hex 3/8-16 38 711425 4 Nut-Flanged Wizz 1/4-20
Item Part No. Qty. Description 39 711439 2 Nut-Flanged Wizz 3/8-16 40 711506 3 WSR-Flat 5/16 STPL 41 711515 1 WSR-Flat .44 x .87 x .07 42 210066 1 Drive Hub Retainer Bolt 43 711517 1 WSR-Flat .77 x 1.37 x .03 44 711523 2 WSR-Wave .37 x .68 x .02 45 711535 10 WSR-Helical .26 x .50 x .02 46 711615 1 Rollpin .12 x .75 47 711803 3 Cotter Pin .06 x .75 48 712042 3 Bolt-WSR HH 5/16-18 x .62 49 712576 2 SCR-MC 1/4-20 x 1.25 SS 50 712666 4 Nut-Hex Jam 1/4-28 SS 51 740428 1 Gearmotor 115V 51A 740432 1 Gearmotor 230V 52 210076 1 Foot Guard 53 760592 2 Knob Oval Tapered 54 210142 1 Pedal Pad 55 828952 1 3/8 Barb x 1/4 MPT 56 833325 1 Elbow Pls. 1/4 MPT x 3/8 Barb 57 833473 1 Hose Barb 1/4 FPT x 3/8 Barb 58 715136 1 Decal Diecut Speed Control 59 711505 8 WSR-Flat 1/4 60 210028 1 1/4-28 x 2.00 Threaded Rod 61 210108 1 Motor Brkt. Weldment 62 210033 1 Olilite-WSR 63 210031 1 Pivot Weldment 64 210029 1 3/8-16 U.N.C. Threaded Rod 65 361254 2 Bearing 66 711443 1 Tinnerman Clip 67 740129 1 Switch 68 710307 2 SCR-MC 6-32 x 1.00 69 711551 2 WSR-Flat 70 260211 1 Spring 71 210387 1 Pedal Stop 72 711373 4 Nut-Nyloc ¼-20 73 210124 2 Bearing Stud 74 711546 2 WSR-Helical 3/8

14

15
Item Part No. Qty. Description
1 210095 1 Wheel Mount Frame 2 210026SP 1 Dashboard, Screen Printed 2A 210026CESP 1 Dashboard, CE Screen Printed 3 210406 1 Squeegee Lift Cable 4 210045 1 Solution Control Cable 5 430059 1 Squeegee Lift Brkt. Assembly 6 430060 1 Squeegee Lift Arm Assembly 7 210452 1 Squeegee Assembly Complete 8 881009 1 Yoke 9 711420 1 Nut-Hex Jam 5/16-18
10 210092 1 Back Cover Weldment
11 450012 1 Cord Strain Relief
12 710197 1 SCR-MC 5/16-18 x .75 STPL 13 710195 5 SCR-MC 5/16-18 x .50 STPL 14 430120 1 U Channel 15 830540 1 Twist Loc Receptacle 16 210415 1 Clevis Pin .312 x 1.69 17 710178 4 SCR-MC 1/4-20 x .50 STPL 18 710180 2 SCR-MC 1/4-20 x .75 STPL 19 250038 1 Retainer Bag Clip 20 711124 3 SCR-ST-B 10 x .37 NI 21 711161 5 SCR HI/LO 10 x 3/4 PL 22 833827 1 O-Ring 1.25 ID x .187 23 711352 1 Nut-Acorn 1/4-20 ST N1 24 711425 4 Nut-Flanged Wizz 1/4-20 25 711503 2 WSR-Flat #10 26 711506 2 WSR-Flat 5/16 STPL 27 711523 1 WSR-Wave .37 x .68 x .02 28 711106 1 SCR-ST-A 10 x .75 PL 29 711808 1 Cotter Pin-Hair #13
Item Part No. Qty. Description
30 829014 1 Flanged Bushing 31 712041 2 BLT-SDER 1/4-20 x .44 x .37 32 712320 2 WSR-Nylon .22 x .45 x .04 33 809754 2 Switch Rocker 33A 740711CE 2 Switch (CE Version) 34 712822 8 SCR-THMS 10-24 x .50 STPL 35 35A 36 805634 1 Cover, Box 37 740220 1 CB 20 amp 115V Model 37A 740106 1 CB 9 amp 230V Model 38 711553 1 WSR-Internal Lock #10 39 833823 1 Hole Plug 40 760286 1 Wire Formed Hook 41 760592 1 Knob Oval Tapered 42 762058 1 Spacer .319 x .375 x .250 43 760142 1 Clamp Ring 44 430103 1 Snap Body 45 828796 1 Female Connector Nylon 46 830292 1 Cord Assembly 115V 46A 740477 1 Cord Assembly 240V 47 210093 1 Wire Support 48 711316 1 ¼-20 Nut 49 450050 2 Heyco Bushing Liquid Tight 50 711400 2 Nut-Pipe Lock ½ 51 740202 1 Rect. Bridge 50A 600V IMP 52 762299 1 Grommet .50 x .09 x .75 53 210096 1 Switch Guard 54 250135 1 Grommet
Parts List

16
Parts List
Item Part No. Qty. Description
1 210351MCH 1 Squeegee Casting
2 210352 1 Rear Squeegee Blade
3 210353 1 Rear Squeegee Strap
4 210354 1 Front Squeegee Blade
5 210355 1 Front Squeegee Strap
6 210381 1 Pitch Control Bracket
7 210118 2 Knob 3-Sided 5/16 Nyloc
8 210357 1 Tube Bracket
9 210390 1 Squeegee Gasket
10 430075 2 Threaded Insert
11 430085 4 Squeegee Bumper Wheel
12 430074 2 Adjusting Nut
13 710975 2 SCR-SC 5/16-18 x .87 BH
14 711374 2 Nut-Nyloc 5/16-18
15 260267 2 Wing Bolt 3/8-16 x .75
16 70-516-16 2 Bolt -Carr 5/16 x 1.00
17 712571 2 Bolt-SS Carr ¼-20 x 1.50
18 712572 2 Bolt-SS Carr ¼-20 x 2.00
19 712573 2 Bolt-SS Carr ¼-20 x 2.50
20 711504 8 WSR-Flat .25 x .56 SS
21 712668 8 Wing Nut ¼-20 SS
22 210102 1 Reinforcing Blade
23 711539 2 WSR-External Lock 3/8
24 712574 2 Bolt-SS Carr ¼-20 x 3.00

17
Parts List
Item Part No. Qty. Description
1 210379 1 Yoke Weldment
2 210372 1 Spring Housing Weldment
3 210392 2 Pivot Bracket Weldment
4 210375 1 Swivel Pin
5 260041 4 ½ Oilite Bushing
6 210391 2 Torsion Spring SS
7 210415 1 Clevis Pin
8 712811 2 SCR-MC 10-24 x .50
9 210400 2 Spacer Tube
10 710592 2 SCR-MC ¼-20 x 2.75
11 210413 2 Return Spring
12 260292 2 Swing Bolt
13 711316 2 Nut-Hex ¼-20
14 711713 2 ½ Retaining Ring
15 710180 1 SCR-MC ¼-20 x .75
16 711535 1 WSR-Helical ¼
17 711519 1 WSR-Flat .25 x 1.00 x .06
18 711808 1 Cotter Pin