Mercury DC-20-1750 Guide

© 2012 Copy Rights Reserved Mercury Floor Machines, Inc.
© 2012 Copy Rights Reserved Mercury Floor Machines, Inc.
Mercury Floor Machines, Inc.
New Equipment Warranty
Limited Warranty
Mercury Floor Machines, Inc. warrants new equipment against defects in material and
workmanship under normal use and service to the original purchaser. Any statutory implied
warranties, including any warranty of merchantability or tness for a particular purpose, are
expressly limited to the duration of this written warranty. Mercury Floor Machines, Inc. will not be
liable for any other damages, including but not limited to indirect or special consequential damages
arising out of or in connection with the furnishing, performance, use or inability to use the machine.
This remedy shall be the exclusive remedy of the purchaser. The warranty period is subject to the
conditions stated below.
5-Year Warranty on Motor and Chassis, 1-Year Service Labor
Mercury Floor Machines, Inc. warrants electric motors and chassis on all Mercury Floor Machines
to be free from defects in material and workmanship, under normal use and service for ve (5)
years to the original purchaser. Parts replaced or repaired under this warranty are warranted for the
remainder of the original warranty period. Service labor charges are covered for one (1) year from
the date of purchase, when performed by a Mercury-authorized service provider. Freight charges
to and from this service provider will be covered for ninety (90) days from the purchase date.
After this ninety (90) day period, these freight charges will be paid by the equipment owner. Travel
expenses are not covered.
Wear Items on all Machines
Critical Wear Items - bearings, capacitors, clutches, pulleys, rectiers, relays, switches, wheels,
tires and casters are warranted for manufacturing defects for one (1) year from the purchase date.
Normal Wear Items - belts, brushes, bumpers carbon brushes, cords, nishes, squeegees, actuating
cables and gaskets are warranted for manufacturing defects for ninety (90) days from the purchase
date.
All warranties of motors and associated components will be voided: if the machine is used as
a oor sander; if the machines is serviced by anyone other than a Mercury-authorized service
provider; if the machine is mechanically modied; or if the machine is misused or abused.
The warranty starts on the purchase date by the original purchaser from an authorized Mercury
Floor Machines, Inc. distributor, subject to proof of purchase. The machine registration card must
be completed and returned immediately at the time of purchase. If proof of purchase cannot be
identied, the warranty start date is ninety (90) days after the date of sale to an authorized Mercury
Floor Machines, Inc. distributor.
Mercury Floor Machines, Inc.
110 South Van Brunt Street
Englewood, NJ 07631
Phone: [phone]
Toll Free: [phone]
Fax: [phone]
www.mercuryoormachines.com
Important Information and Safety Instructions
Register your Machine at mercuryoormachines.com/registration.aspx
Serial No:
Dynamite Ultra D.C. Burnisher
Direct Drive
Safe & Easy to Use
Fully Adjustable
Balanced Design
Low Prole Drive
Quiet Motor
REGISTER
YOUR
MACHINE
ONLINE!
Safety, Operation and Maintenance
Manual with Parts List
Please read before use!
1750 RPM, 20” Apron
Model No.. DC-20-1750

1.0 Safety Instructions
READ THIS MANUAL BEFORE USING BURNISHER. KNOW THE PROPER
OPERATION, CORRECT APPLICATIONS AND THE LIMITATIONS OF THIS
EQUIPMENT BEFORE USE.
Reduce the Risk of Fire, Electric Shock or Injury:
• This burnisher is designed for indoor use only. Do not
use outdoors. Do not expose to rain.
• Do not wash the motor with owing water. If the motor
gets wet, seek authorized service.
• Keep the vents on this air-cooled motor free from
debris. Do not operate with the motor covered or with
vents blocked. Do not use this machine as a oor
sander.
• Never operate this machine near ammable dusts,
liquids or vapors. Never use ammable solvents as a
cleaning agent. Engine sparks and operating heat can
cause re.
• Never handle electrical equipment with wet hands.
Never operate this machine with bare feet.
• Unplug the machine when not in use and when
servicing the equipment. To unplug, grasp the plug not
the cord.
• Do not operate a burnisher with damaged handle
controls, cord or plug. If the equipment is not
performing properly, seek repair from a qualied
service supplier.
• This machine is constructed with electrical grounding
at the plug. Operate only when connected to a properly
grounded outlet. See section 1.2 for grounding details.
• Prevent electrical cord abuse. Do not close a door upon
the cord, drive equipment over it, or run the burnisher
over it. Do not expose the cord to hot surfaces. Do not
lift, pull or carry this burnisher by the cord.
• Never operate the machine over sharp objects that can
be thrown out and harm the operator and damage the
oor. Sweep hard oors before scrubbing or bufng.
Vacuum clean carpets before shampooing or bonnet
cleaning.
• Train your staff in proper use of this machine.
7.0 Parts List Continued
Item No. Description Part No. Qty.
46 Drip Cap Mount Screw B-151 3
47 66 Fr. Drip Cap Cover M-242 1
48 66 Fr. Drip Cap Cover Bumper M-239 1
49 UHS Motor Screen SCR-01 1
50 UHS Motor Screen Bumper - Red M-238-R 1
51 Cork Drip Cap Gasket M-248 2
52 Motor Motor-DC-1HP 1
53 Washer B-28 4
54 Motor Mount Bolt for Motor B-143 4
55 Base Casting 20” A-133 1
56 Cap Screw B-31 2
57 Flat Washer B-34 2
58 Front Wheel Assembly FCA-1 1
59 Lock Nut B-27 2
60 Bumper 20” M-303 1
61 Ground Wire Screw B-68 3
62 Floppy Disk Driver 20” DC-20 1
63 Yellow Screw in Pad Retainer PR-7ABL 1
64 Screw B-95 4
65 Bumper Strap 20” M-303a 1
66 Pulley Driver PD-1 1
67 Allen Head Set Screw For PD B-149 1
68 Cotter Pin Wheel Axel B-142 2
69 Spring Washer B-51 4
70 6” Wheel M-245 2
71 Wheel Axel B-16 2
(2) Dynamite Ultra D.C. Burnisher Dynamite Ultra D.C. Burnisher (11)

7.0 Parts List
Item No. Description Part No. Qty.
1 Switch Box Back Cover A-104 1
2 Handle Tube Screw B-23 2
3 Switch Box Closing Screws B-21 4
4 Strain Relief Clip M-213 1
5 Switch Plate Screw B-68 2
6 Rubber Spacer - Black M-218B 2
7 Hand Grip M-218 2
8 Handle Tube Insert M-247 1
9 Handle Tube Assembly M-206 1
10 Cable Hook Screw B-2 2
11 Cable Hook A-164 1
12 Sliding Collar A-111 1
13 Flat Washer B-37 1
14 Split Washer B-39 1
15 Cam Lock Wing Nut B-25 1
16 Straight Brace M-233 2
17 Stop Nut B-10 1
18 Washer B-28 2
19 Cap Screw B-9 2
20 Yoke Tube Mount Bolt B-18A 2
21 Tube Mounting Nut B-19 2
22 Yoke A-1001 1
23 Yoke Nut B10 1
24 Yoke Bolt B14 1
25 Handle Tube Cable G-16 1
26 Black Rubber Cable Connector M-249 1
27 Cable Grommet B-63 1
28 Rectangular Hole Cam Washer B-67 1
29 Cam Assembly C-100 1
29A Complete Cam Assembly Kit CCA 1
(Includes 1 each of Drawing Items
#13, 14, 15, 28, 29)
30 50-Foot, 14/3-Gauge Red Power Cable G-14-50-R 1
31 Insulated Flag Wire Connector G-48 5
32 On-off Switch And Plate Assembly G-30-AB 1
33 Switch Mounting Plate G-30-B 1
34 Ground Wire Screw B-1 2
35 Int. Tooth Lock Washer B-35 1
36 Flat Hex Nut B-33 1
37 Trigger Return Spring G-30-C-T057 1
38 Label - Switchbox No Part No. 1
39 Switch Box Front A-103 1
40 Wire Nut G-47 1
41 Triggers A-105 2
42 15” Crossbar M-211-A 1
43 Trigger Pins B-70 2
44 Cross Bar Screw B-22 2
45 Safety Interlock Assembly SIA-1 1
(10) Dynamite Ultra D.C. Burnisher Dynamite Ultra D.C. Burnisher (3)
1.1 Electrical Power
This oor machine operates on a 15 amp, nominal 120 V, 60
Hz A.C. power circuit (motors may be custom wired at the
factory for 220 V, 50 Hz international operation). The amp,
hertz and voltage ratings are listed on the motor spec label
found on each burnisher. Using voltages above or below those
indicated on the spec label will damage the motor. Always
check your local voltage requirements.
1.2 Grounding Instruction
This burnisher must be grounded while in use to protect the
operator from electrical shock. This machine is built with a
3-wire cord and a 3-prong grounding-type plug (Figure 1) to t
a properly grounded receptacle.
Before using this burnisher, make sure a properly grounded,
3-hole electrical outlet is available. If not available, as in some
older facilities, use an adapter for connecting a 3-prong plug to
a 2-prong receptacle (Figure 2) to ground the outlet chassis.
IMPORTANT: This adaptor may not be used in Canada.
IMPORTANT: Never cut off the grounding prong for use in a
2-prong outlet. By doing so, you have cut off your protection
from electrical shock.
Never assume that all 3-hole outlets are properly grounded.
Check before use.
Never assume that an adaptor connection (as in Figure 2)
is properly grounded. Check the outlet with a ground fault
interrupter device which quickly indicated if a ground is
connected. Correct a faulty grounding before proceeding.
1.3 Extension Cords are Not
Recommended:
The burnisher is built with a 50-foot safety cord which plugs
directly into an approved outlet. Use of any extension cords is
NEVER RECOMMENDED.
Figure 1
Figure 2

6.0 Machine Schematic Drawing
(4) Dynamite Ultra D.C. Burnisher Dynamite Ultra D.C. Burnisher (9)
2.0 Mount the Machine Handle
This high-speed burnisher is shipped from the factory with the handle unattached. You
will need two (2) 7/16” wrenches to complete the assembly.
Remove the handle and mounting hardware from its carton. Bolts, nuts, washers and the
locking lever assembly are in the plastic bag attached to the handle.
1. Mount the handle to the chassis:
Align the handle with the yoke (1) over the
mount (2) on the burnisher chassis. The power
cord will be facing away from the motor. Place
a at washer (4) on a 3” bolt (3), then place the
bolt through the holes in the yoke and the mount.
Place another washer on the bolt and secure with
the locking nut (5). Tip the handle back and out
of your way for the next step.
2. Mount the support braces on the handle:
Tip the handle up. The handle mounting collar
(7) is designed to slide freely up and down the
handle tube, allowing the handle to be adjusted
for the comfortable operation of all users. Line
up the mounting collar with the upper holes in
the two straight handle braces (6).
3. Complete handle assembly:
• Place the curved spacer (12) with a square
hole onto the locking lever shaft (11). The
curve must face the lever.
• From behind the machine, insert the shaft
through the right handle brace (6), the
mounting collar (7) and the left handle brace.
• Place a spacer (9) on the shaft.
• Place the split washer (13) on the shaft.
• Place the locking wing nut (14) on the shaft.
• Adjust the wing nut for tightness. When
correctly installed, the collar slides easily
when the cam-engineered locking lever is
“up,” but is rmly xed when the lever is
“down.”

2.1 Attach the Power Cord
The triple-wire grounded power cord has been factory-
installed into the handle tube. A exible rubber cable
connector (11) is used to secure the plug-in connections.
The burnisher ships with this connector mounted on the cord
coming out of the handle (10).
Stretch the connector and slip the male connector (9)
(coming out of the motor housing) through the connector
hole and then into the female connector.
Plug the end of the 50-foot power cord into a grounded
power outlet. Squeeze the triggers on the handle and check
for power to the motor.
2.2 Inspect the Pad Driver
A exible, high-speed pad driver has been
bolted onto the burnisher and dynamically
balanced. This driver is the connection between
the burnisher and a disposable pad that
burnishes the hard oor nish. If this molded
plastic part ever becomes damaged or if the
molded hooks are worn and cannot hold the
pad, replace promptly.
Unplug the burnisher. Lock the handle in the
“up” position and tip the machine back fully.
Remove the four mounting screws (11) and
washers (12) from the drive hub (13).
Place the new pad driver (14) onto the main drive pulley. Insert the mounting screws (11)
through the washers (12) into the bolt hole. Tighten securely.
2.3 Install the Pad
The face (bottom) of the pad driver (14) is
covered with small “hooks” that grab onto the
pad (16). Every time you mount a new pad onto
the pad driver, follow these steps:
• Unplug the burnisher. Lock the handle in the
“up” position and tip the machine back fully.
• Pad Sizes: 20” diameter pad on the 20”
machine. Mount a pad (16) over the male
shoulder (15) on the pad driver. Make sure
that the pad is centered on the driver.
• Insert the locking ring (17) through the center hole in the pad and into the shoulder.
Tighten until the locking ring lies below the face of the pad. If the ring is not fully
locked, it will scratch the oor.
NEVER operate the burnisher without a pad. NEVER operate the burnisher with a
damaged pad or without a locking ring to hold the pad in place.
5.0 Handle Schematic Drawing
(8) Dynamite Ultra D.C. Burnisher Dynamite Ultra D.C. Burnisher (5)

2.4 Adjust the Front Wheel Assembly on 1750 RPM Model
The 1750 RPM model is designed with a front wheel
assembly that controls the down pressure that the pad
applies to the oor. Raise the apron height to reduce the
down pressure. Lower the apron height as the pad wears.
The warranty on a 1750 RPM machine will be voided if the
machine is operated without this wheel assembly in place
and operating correctly.
3.0 Operating Tips
• For indoor use only. Sweep abrasive soils before burnishing.
• While the pad driver is spinning, keep the burnisher moving to avoid “donut” burns on
the oor.
3.1 To Start Operation:
• Unlock the handle by raising the locking lever.
• Lower the handle to a comfortable position, typically waist
high.
• Relock the handle by pushing the lever down. NEVER
OPERATE THE MACHINE WITH THE HANDLE
UNLOCKED.
• This burnisher has a high torque motor.
• Hold the machine rmly with both hands when
starting up.
• Push the red safety interlock switch forward to
unlock the dual triggers.
• Squeeze both triggers to power the motor. Once
power is on, either trigger will keep power to the
motor. To stop, release both triggers.
3.2 To Store your Machine:
• Lock the handle in the “up” position. Tilt the machine back onto the
transport wheels. Never store the machine with the pad on the ground.
• Wind the cord around the handles and the bottom cord hook.
• Wash pads and hang to dry.
• Inspect and maintain equipment on a regular schedule for best results.
• Check and clean pads after each operation. Remove soil and chemical
buildup. Replace worn or damaged pads.
• Check the triggers and switches for proper operation.
• Use air pressure or vacuum to remove dust and debris from the motor
vents.
• Report problems and repair promptly.
(6) Dynamite Ultra D.C. Burnisher Dynamite Ultra D.C. Burnisher (7)
3.3 Transport:
To transport this burnisher from the janitor’s closet to
the work area:
• Lock the handle in the “up” position. Wind the cord
around the handles and the bottom cord hook.
• Tip the machine back onto the transport wheels. Push
or pull the machine by the handle, not by the cord or
any other part of the machine.
4.0 Troubleshooting
Never operate this burnisher when the equipment is not performing as expected or
when any parts are visibly damaged. The cause and solution for some basic problems
are described below. When repair is needed, take the equipment to an authorized repair
service center.
4.1 Burnisher will not Run:
• Circuit breakers are tripped in the building. Check and reset.
• Equipment is unplugged. Check plug at wall and at machine base. Plug in.
• Power cord failure. Test with a working power cord. Lock the handle up and tip the
motor back. Unplug the cord at the motor and plug the motor into your working
power cord.
IMPORTANT: this is just for testing! When you do this, you have removed the safety
handle controls from the circuit and you are sending power directly to the motor.
If the motor now spins, the problem is in the cord of the handle assembly. Seek
authorized repair service.
If the motor still does not spin, the problem is either in the male connection at the
motor base or in the motor. Seek authorized repair service.
• Motor sparks or smokes. Seek authorized repair service.
4.2 Electrical Shock to Operator:
• Equipment wiring failure or electrical short in the machine. Seek authorized service.
• Poor grounding or no grounding. Test the outlet with a ground fault interrupter.
Retain certied electrician to inspect and repair grounding. NEVER clip off the
ground plug on your cord.
• Repeated circuit breaking. High amp draw and circuit breaking can be an electrical
or mechanical problem. Seek authorized repair service.
4.3 High Vibration:
• Pads are not centered on the pad driver. Tip machine back and re-center the pad.
• Uneven wear or warp to pad or brushes. Replace.
• Machine chassis is damaged by dropping. Replace. Travel carefully.
PUSH LOCK
FORWARD
SQUEEZE BOTH
TRIGGERS