844-241-9499
Operation/Parts
GrindLazer Standard DC21 E
GrindLazer Standard RC71 E
™
GrindLazer
For removal of materials from flat concrete and asphalt surfaces.
For professional use only.
Model 25M841 - GrindLazer Standard DC21 E / 1hp, 120Vac
Model 25M848 - GrindLazer Standard RC71 E / 1hp, 120Vac
Important Safety Instructions
Read all warnings and instructions in this manual and the
grinder manual. Be familiar with the controls and the
proper usage of the equipment. Save all instructions.
3A5575A
EN
Contents
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GrindLazer Standard DC21 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GrindLazer Standard RC71 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Machine Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cutting Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Parts - Grindlazer Standard DC21 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Parts - Grindlazer Standard RC71 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2 3A5575A
Warnings
WARNING
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this
equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols
refer to procedure-specific risks. When these symbols appear in the body of this manual or on
warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not
covered in this section may appear throughout the body of this manual where applicable.
DUST AND DEBRIS HAZARD
Grinding concrete and other surfaces with this equipment can create dust that contains hazardous
substances. Grinding can also create flying debris.
To reduce the risk of serious injury:
• Control the dust to meet all applicable workplace regulations.
• Wear protective eyewear and a properly fit-tested and government approved respirator suitable for
the dust conditions.
• Use equipment only in a well-ventilated area.
• Grinding equipment must be used only by trained personnel who understand the applicable
workplace regulations.
ROTATING PARTS HAZARD
Rotating parts can cut or amputate fingers and other body parts.
• Keep clear of rotating parts.
• Do not operate equipment with protective guards or covers removed.
• Before checking, moving, or servicing equipment, disable power supply.
BURN HAZARD
Equipment surfaces that are heated can become very hot during operation. To avoid severe burns, do
not touch hot equipment. Wait until equipment has cooled completely.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not leave the work area while equipment is energized. Turn off all equipment when equipment
is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your distributor for information.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
• Maintain a safe operating distance from other people in the work area.
• Avoid any pipes, columns, openings, or any other objects protruding from work surface.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of dust or
chemicals, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eye wear.
• Protective shoes.
• Gloves.
• Hearing protection.
• Properly fit-tested and government approved respirator suitable for the dust conditions.
3A5575A 3
Warnings
WARNING
120V US
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause
electric shock.
• Turn off and disconnect power cord before servicing equipment.
• Connect only to grounded electrical outlets.
• Use only 3-wire extension cords.
• Ensure ground prongs are intact on power and extension cords.
• Do not expose to rain. Store indoors.
GROUNDING
This product must be grounded. In the event of an electrical short circuit, grounding reduces the risk
of electric shock by providing an escape wire for the electric current. This product is equipped with a
cord having a grounding wire with an appropriate grounding plug. The plug must be plugged into an
outlet that is properly installed and grounded in accordance with all local codes and ordinances.
• Improper installation of the grounding plug is able to result in a risk of electric shock.
• When repair or replacement of the cord or plug is required, do not connect the grounding wire to
either flat blade terminal.
• The wire with insulation having an outer surface that is green with or without yellow stripes is the
grounding wire.
• Check with a qualified electrician or serviceman when the grounding instructions are not
completely understood, or when in doubt as to whether the product is properly grounded.
• Do not modify the plug provided; if it does not fit the outlet, have the proper outlet installed by a
qualified electrician.
• This product is for use on a nominal 120V circuit and has a grounding plug similar to the plugs
illustrated in the figure below.
• Only connect the product to an outlet having the same configuration as the plug.
• Do not use an adapter with this product.
Extension Cords:
• Use only a 3-wire extension cord that has a grounding plug and a grounding receptacle that
accepts the plug on the product.
• Make sure your extension cord is not damaged. If an extension cord is necessary, use 12 AWG
(2.5 mm
• An undersized cord results in a drop in line voltage and loss of power and overheating.
2
) minimum to carry the current that the product draws.
4 3A5575A
Component Identification
GrindLazer Standard DC21 E
Component Identification
A Grinder
BCutter Drum
C Handle
D Vacuum Port
E Trigger
F Trigger Lock
G Speed Control Dial (1-slowest, 6-fastest)
H Drive Shaft Lock
IDust Skirt
3A5575A 5
Component
Component Identification
GrindLazer Standard RC71 E
A Grinder
BCutter Drum
C Handle
D Vacuum Port
E Trigger
F Trigger Lock
G Speed Control Dial (1-slowest, 6-fastest)
H Drive Shaft Lock
IDust Skirt
6 3A5575A
Component
Operation
Operation
Machine Start-Up
1. If using a vacuum, attach vacuum hose to the
vacuum port. Turn the vacuum on.
2. Plug power cord into a grounded outlet.
3. Hold the unit with the cutters 2-4 inches (5-10 cm)
off the surface to be scarified.
Cutting Material
1. While holding the machine firmly, press the cutters
into the surface to be cut.
2. When ready to stop cutting material, lift the cutters
off of the surface, release the trigger, and allow the
cutters to come to a stop.
4. Depress the trigger and adjust the speed dial to the
desired setting.
3A5575A 7
3. Unplug the power cord from the power source.
Maintenance
1. Inspect the dust skirt on the scarifier daily. Repair or
replace the skirt if it is torn or damaged to ensure
maximum dust and debris containment.
2. Inspect cutters daily and replace cutters that appear
worn in order to achieve optimal cutting speed and
surface finish.
Parts - GrindLazer Standard DC21 E
Ref. Torque
240-250 in-lb (27.1-28.2 N•m)
70-80 in-lb (7.9-9.0 N•m)
120-130 in-lb (13.6-14.7 N•m)
10-12 in-lb (1.1-1.4 N•m)
123
4
2
4
1
3
Parts - GrindLazer Standard DC21 E
Parts List
Item: P/N Qty Description
1 17W312 1 Grinder
2 17W269 1 Foam Grip
3 17W313 1 Housing Assembly (inc. 3a-3d)
3a 17W870 2 Rubber Skirt
3b 17W871 4 Screw
3c 17W872 1 Side Plate, Outside
3d 17W873 1 Side Plate, Inside
4 17W874 1 Locking Collar
5 17W876 1 Socket Cap Screw
6 17W314 1 Vacuum Port Cap
7 17W877 2 Drum Offset Spacer
8* 25M889 1 Flail Drum Assembly (inc. 8a-8g)
8 3A5575A
8a 17W879 1 Blank Drum (inc. 8b-8e)
8b 17W880 6 Shaft
8c 17W881 2 Retaining Plate
8d 17W882 4 Washer
8e 17W883 4 Screw
8f 19A009 36 Cutter
8g 17W425 42 Spacer
9 17W878 7 Flat Head Screw
10
17W315 1 Warning Label
* Other drum assembly options are available.
Replacement safety labels, tags, and cards are available at
no cost.
Parts - GrindLazer Standard RC71 E
Ref. Torque
65-75 in-lb (7.3-8.5 N•m)
26-30 ft-lb (35.3-40.7 N•m)
1
2
2
1
1
Parts - GrindLazer Standard RC71 E
Parts List
Item: P/N Qty Description
1 17W312 1 Grinder
2 17W320 1 Locking Collar
3 17W876 1 Socket Cap Screw
4 17W934 3 Lock Washer
5 17W318 1 Housing Assembly
6 17W319 1 Vacuum Port Cap
7 17W884 1 Drum Adapter Mount
8 17W885 3 Hex Cap Screw
9 17W886 3 Flat Washer
3A5575A 9
10* 25M911 1 Flail Drum Assembly
10a 17W887 1 Pin Retainer
10b 17W888 7 Pin
10c 17W889 1 Drum Body
10d 19A009 21 Cutter
10e 17W425 21 Spacer
11 17W321 1 Hex Cap Screw
12
17W315 1 Warning Label
* Other drum assembly options are available.
Replacement safety labels, tags, and cards are available at
no cost.
Technical Data
Technical Data
Dimensions (unpackaged)
Height in./cm:
Width in./cm:
Length in.cm:
Weight lb/kg:
Maximum Amperage
Electrical Power Requirement
Dimensions (unpackaged)
Height in./cm:
Width in./cm:
Length in.cm:
Weight lb/kg:
Maximum Amperage
Electrical Power Requirement
GrindLazer DC21 E (25M841)
19 (48.3)
8 (20.3)
9 (22.9)
12 (5.4)
10 Amps
120Vac, 60 Hz, 15 A, 1Ø
GrindLazer RC71 E (25M848)
20 (50.8)
12 (30.5)
11 (27.9)
15 (6.8)
10 Amps
120Vac, 60 Hz, 15 A, 1Ø
10 3A5575A
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of
the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned
to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs
will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or
consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or
the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,
given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la
rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite
de ou en rapport, directement ou indirectement, avec les procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
For patent information, see www.graco.com/patents.
TO PLACE AN ORDER, contact your Graco distributor or call 1-800-690-2894 to identify the nearest distributor.
All written and visual data contained in this document reflects the latest product information available at the time of publication.
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2018, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 3A5575
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
www.graco.com
Revision A,
March 2018
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