Minuteman 620316 Guide

ES320
Floor Scrubber
Traction Driven
Model #:
P320QP
P320CE
P320QPIW
OPERATION ■SERVICE ■PARTS ■CARE

TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS...........................................................................................................................................1
FOR SAFETY DURING OPERATION: ..............................................................................................................................................1
FOR SAFETY WHEN SERVICING OR MAINTAINING MACHINE:..............................................................................................1
ELECTRICAL REQUIREMENTS .......................................................................................................................................................2
BATTERY REQUIREMENTS.............................................................................................................................................................2
BATTERY SERVICE AND INSTALLATION....................................................................................................................................2
BATTERY INSTALLATION: .............................................................................................................................................................2
CHARGING BATTERIES:..................................................................................................................................................................2
CONTROL PANEL IDENTIFICATION..............................................................................................................................................3
OPERATING INSTRUCTIONS............................................................................................................................................................4
MAINTENANCE.....................................................................................................................................................................................4
REAR SQUEEGEE.................................................................................................................................................................................5
REAR SQUEEGEE COMPONENTS...................................................................................................................................................5
REAR SQUEEGEE ADJUSTMENT....................................................................................................................................................6
EXPLODED VIEWS...............................................................................................................................................................................7
MAIN ASSEMBLY..............................................................................................................................................................................7
MAIN ASSEMBLY BOM....................................................................................................................................................................8
SOLUTION &RECOVERY TANK.....................................................................................................................................................9
SOLUTION &RECOVERY TANK BOM.........................................................................................................................................10
MAINFRAME ASSEMBLY ..............................................................................................................................................................11
MAINFRAME ASSEMBLY BOM ....................................................................................................................................................12
LINKAGE ASSEMBLY.....................................................................................................................................................................13
LINKAGE ASSEMBLY BOM...........................................................................................................................................................14
CONTROL PANELS..........................................................................................................................................................................15
CONTROL PANELS BOM................................................................................................................................................................16
SQUEEGEE LIFT MECHANISM ASSEMBLY................................................................................................................................17
SQUEEGEE LIFT MECHANISM ASSEMBLY BOM......................................................................................................................18
SQUEEGEE ADJUSTMENT MECHANISM ASSEMBLY..............................................................................................................19
SQUEEGEE BLADE ASSEMBLY....................................................................................................................................................20
WIRING DIAGRAM (STANDARD MODELS).................................................................................................................................21
WIRING DIAGRAM (CE MODELS).................................................................................................................................................23
MINUTEMAN INTERNATIONAL MADE SIMPLE COMMERCIAL LIMITED WARRANTY..............................................25

1
IMPORTANT SAFETY INSTRUCTIONS
Operators must read and understand this manual before operating or maintaining this machine.
Do not operate this machine in areas containing flammable or explosive materials.
This machine is designed solely for scrubbing dirt and dust in an indoor environment. Minuteman does not
recommend using this machine in any other capacity.
The following information below may cause 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 closed and
fastened before use.
During operation, attention should be paid to other persons in the work area.
Electric motors and components can cause an explosion when operated near explosive materials or vapor. Do not
operate this machine near flammable materials such as solvents, thinners, fuels, grain dust, etc.
Store or park this machine on a level surface only, with the key switch in the off position. To prevent unauthorized
use, machine should be stored with the key removed.
This machine is designed for level operation only. Do not operate on ramps or inclines.
This machine is not suitable for picking up hazardous dusts.
Use caution when moving this machine into areas that are below freezing temperatures. Any water in the tanks or
hoses can cause damage to the machine.
FOR SAFETY WHEN SERVICING OR MAINTAINING MACHINE:
Stop on a level surface and turn off the machine.
Disconnect the power to the machine by unplugging the large, red terminal below the recovery tank when charging
batteries or during installation or removal of brushes.
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 batteries.
Charging batteries generates explosive gasses. Do not charge batteries when open flames or sparks are
present. Do not smoke. Make sure the charger is turned off before disconnecting it from the machine. Charge the
batteries in a well-ventilated area with the battery cover removed completely.
Do not clean machine with a pressure washer.
Authorized personnel must perform repairs and maintenance. Use ONLY Minuteman supplied replacement parts.
SAVE THESE INSTRUCTIONS

2
ELECTRICAL REQUIREMENTS:
This piece of equipment operates on 24 VOLT DC.
BATTERY REQUIREMENTS:
4 x 6V, 275Ah batteries (Part Number 956740)
BATTERY SERVICE AND INSTALLATION
WARNING: 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
batteries.
BATTERY INSTALLATION:
1. Disconnect tank drain hose from rear of machine.
2. Raise the tank assembly by raising rear cover and tilting tank, Figure 1.
3. Install batteries as shown in Figure 2.
CHARGING BATTERIES:
Charging of batteries generates explosive gases. DO NOT CHARGE BATTERIES WHEN OPEN
FLAMES OR SPARKS ARE PRESENT. DO NOT SMOKE. Make sure charger is turned off before
disconnecting it from the batteries. Charge the batteries in well-ventilated area. Fluid levels should
be checked before and after charging and maintained at the proper levels.

3
CONTROL PANEL IDENTIFICATION

4
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. Close lid.
3. Turn on main power key switch (refer to page 5, #15).
4. Adjust main speed control knob (#14) to full counter-clockwise position.
5. Lower brush assembly:
•Depress foot pedal (#6) slightly and push in on lever (#4) to release. To increase brush
pressure, pull up and back on lever (#4) to lock position.
•To lift the brush, press the pedal down until lift mechanism engages.
•Brushes will begin to rotate when forward (#16) or reverse (#8) levers are engaged.
6. Adjust solution control feed lever (#3).
8. Lower squeegee assembly with lever (#2). This will turn on the vacuum motor. The vacuum will
remain on until the squeegee lever (#2) is raised. After this, the motor will continue to run for
an additional 10 seconds to clear the recovery lines.
Turning off the power using the key switch will immediately shut down all systems,
including vacuum motor, transaxle, and solution feed.
9. Squeeze forward handle (#16), and adjust forward speed using control knob (#14).
After Use:
1. Raise brushes with foot pedal (#6), brushes and solution flow will turn off .
2. Raise squeegee assembly; vacuum will shut off 10 seconds after raising.
3. Solution and recovery tanks should be emptied after every use. These tanks can be
emptied using drain hoses (#5 & #19).
MAINTENANCE
Daily:
1. Clean float assembly & squeegee blades.
2. Recharge batteries (check battery acid levels before and after charging).
Monthly:
1. Check wear on squeegee blades.
2. Grease front and rear wheels.
3. Grease pivot points on the brush motor assembly.
Every 500 hours check the condition of carbon brushes on vacuum motor and brush drive motor.

5
REAR SQUEEGEE
The rear squeegee is the main element that acts as the conduit that transfers the spent
solution into the recovery tank. A daily maintenance check of this component is essential to
have optimum machine performance. The rear squeegee assembly is equipped with a
universal front blade that allows the operator the option to use a slotted and a non-slotted side
for specific applications. Each blade configuration has two usable edges. The rear blade
however has four usable edges.
The squeegee is pre-adjusted at the factory. Adjustments may be required to get
optimum performance for different floors and conditions.
REAR SQUEEGEE COMPONENTS
A
B
C
D
E
F
G
H
Rear Squeegee Blade
Wing Nut (2)
Caster Stem (2)
Swivel Caster (2)
Wing Jam Nut (2)
Turnbuckle Adjustment Knob
Front Squeegee Blade
Wing Bolt (2)
I
J
K
L
M
N
O
P
Toggle Clamp
Front Strap (Long)
Front Strap (Short)
Rear Strap (Latch Side)
Rear Strap (Catch Side)
Latch
Guide Wheel (2)
Recovery Hose Intake

6
REAR SQUEEGEE ADJUSTMENT
1. Ensure that the scrubber is on a relatively flat surface. Turn on the key switch and lower the
squeegee to the floor using the squeegee lift lever. This turns the vacuum motor on.
2. Move the scrubber one or two feet forward slowly while someone behind the machine checks
the rear squeegee blade (item A) for uniform deflection to the floor.
3. If uneven deflection or lay is evident, minor adjustments may be necessary to avoid streaking
and uneven wear on the blade.
4. To correct this, loosen the wing jam nut (item B) in order to adjust the caster height. If the
squeegee blade is deflecting too much, the casters (item D) need to be lowered to control the
down pressure. Lower the caster by turning the exposed threaded stem (item C) on the
caster clockwise. Make the adjustment a few turns at a time. Repeat step 2.
5. If the blades are not deflecting enough, raise the caster by turning the stem counter-
clockwise to adjust the caster height to allow more down pressure on the squeegee. Repeat
step 2.
6. Make sure there is even deflection on the entire length of the rear blade. Adjust the casters
and retighten the wing jam nuts to lock the caster setting in place.
7. Pitch adjustment is necessary if the outer ends on the squeegee blade do not contact the
floor and there is too much deflection in the middle area or if the outer ends are over
deflected and there is no contact in the middle.
8. To adjust the pitch, Repeat step 2.
9. Loosen the two wing jam nuts (item E) that lock the pitch angle. Turning the knob (item F)
clockwise or counter-clockwise controls the forward and backward pitch of the squeegee.
Having the rear blades deflected uniformly along its entire length is the desired set-up.
10. Repeat step 2 until desired set-up is achieved.
11. In certain applications where a non-slotted front wiper blade (item G) is needed, detach the
rear squeegee assembly by loosening the two wing bolts (item H). Unlock the toggle clamp
(item I) on the front squeegee to release the front long strap (item J) and slide the front short
strap (item K). Flip the blade over to the non-slotted side. Reattach the straps and lock the
clamp back in place.
12. You can also easily replace the rear blade by unlatching the latch (item N) and removing the
two rear straps (items L& M) by sliding them off the assembly. You can then flip the blade
over in order to use a new edge for better wiping action.

EXPLODED VIEWS
MAIN ASSEMBLY
7