Performance Tool M656 User manual

1/4" ANGLE HEAD DIE GRINDER
OWNER’S MANUAL
Stock Number M656
SPECIFICATIONS:
Collet size (IN.)................................................ 1/4
Air pressure (P.S.I.) .............................................90
Average air consumption (C.F.M.) ...................................4
Free speed (R.P.M.) ......................................... 20,000
Air inlet (N.P.T.)................................................ 1/4
Hose size (I.D.)..............................................3/8 in.
Weight (LBS) ................................................. 1.3
Specifications are subject to change without notice.
WARNING!
READ, UNDERSTAND AND FOLLOW ALL INSTRUCTIONS AND
WARNINGS BEFORE OPERATING THIS TOOL. FAILURE TO DO SO
MAY RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE
AND WILL VOID WARRANTY.
P.O. Box 88259 Tukwila, WA 98138 • 1-800-497-0552 • www.wilmarcorp.com • Made in China • © Copyright 2016

IMPORTANT SAFETY INFORMATION
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lighted. Do not use electrically
powered tools in the presence of flammable gases or liquids. Do not bring combustible
materials near the tools.
3. As with any tool, use common sense when operating. Do not wear loose clothing or
jewelry that could become caught by moving parts, causing injury. Operate tool a safe
distance from yourself and others in the work area.
4. Keep children away. Children must never be allowed in the work area. Do not let them
handle machines, tools, hoses or extension cords.
5. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and keep out of reach of children and other untrained
persons. Switch off all unused electrical tools when stored. Tools are dangerous in the
hands of untrained users.
6. Always wear approved eye protection when using tools. If raising dust, wear a suitable
mask.
7. Work Safe. When wearing gloves to operate the tool, make sure that the gloves do not
interfere with operating the Trigger. Test your gloves with the Trigger before attaching
the unit to an air source. Keep your finger away from the Trigger until you are ready to
work. Never start the tool unless you have a firm grip with both hands and you are
positioned at your workpiece or area. Before using the tool, know what is directly
underneath the work area or work piece. The tool can quickly penetrate material. If
working directly on the ground, make sure you are not directly above shallow cables,
lines, or pipes. Keep your limbs and body clear of the tool. If an accessory or
attachment breaks off, the tool tends to surge forward suddenly. Operate tool a safe
distance from yourself and others in the work area. Make sure the immediate area is
clear of other people or animals. Spectators must stay at a safe distance. Never point
the tool or the air hose (not included) at anyone. Keep proper footing and balance at
all times. Do not reach over or across running machines, hoses, etc.
8. Do not operate any tool if under the influence of alcohol or drugs. Read warning labels
on prescriptions to determine if your judgment or reflexes are impaired while taking
drugs. If there is any doubt, do not operate any tool.
9. Be sure air is in OFF position when connecting tool to air supply.
10. Use only those accessories that are designed for use with tools. For example, with
impact wrenches do not use ordinary sockets. Use impact sockets for all air tools.
11. Be sure to disconnect tool from air supply before changing accessories, performing
service on tool and when not in use.
12. Follow air source manufacturers' directions for connection of regulators, filters, and
other accessories to air source. Do not install quick couplers directly on tool as they
put unnecessary strain on the air inlet threads possibly causing them to wear out
prematurely. Instead, install them on a short length of air hose attached to the tool.
WARNING!
READ, UNDERSTAND AND FOLLOW ALL INSTRUCTIONS AND
WARNINGS BEFORE OPERATING THIS TOOL. FAILURE TO DO
SO MAY RESULT IN PERSONAL INJURY AND/OR PROPERTY
DAMAGE AND WILL VOID WARRANTY.

Oil tool before each use. 4 to 5 drops of a good grade Air Tool Oil placed in the air inlet is
sufficient. Use proper air pressure and CFM rating listed for this tool.
Drain water from hoses and compressor tank. Water in the air supply line will cause
gumming and loss of power. Clean the air filter on the supply line and flush the tool with
gum solvent or a 50/50 mix of air tool oil and kerosene. It may be necessary to
disassemble the tool to properly clean and re-lubricate.
LUBRICATION & MAINTENANCE
Motor
Oil
Trans.
Fluid
Brake
Fluid
Water
Whip
hose
Air Tool
Oil
Yes No
1. When using the grinder be careful not to exert excessive force. Too much force may be
hazardous if it causes the grinding tool spindle to bend or break.
2. The burning of the work piece or excessive speed reduction indicates too much force
being applied.
3. Avoid hazardous conditions by making sure the spindle of grinding tool is placed at least
7/16" inside the collet.
4. Use only grinding stones rated at 20,000 RPM or higher.
OPERATION
Air Inlet
Safety Trigger
90º Angle head
IMPORTANT SAFETY INFORMATION
ASSEMBLY / INSTALLATION
1. You will need to prepare the 1/4" Quick-disconnect Coupler Plug to connect to the air inlet on the
Die Grinder. Wrap the Coupler Plug with pipe thread seal tape before threading it into the Air Inlet.
Connect the a Quick-Disconnect coupler on a 3/8" ID Air Source Hose to the tool.
Note: If you are not using an automatic oiler system, before operation, add a few drops of Pneumatic
Tool Oil to the airline connection. Add a few drops more after each hour of continual use.
2. Set the air pressure on your compressor to 90 PSI. Do not exceed the recommended air pressure
of 90 PSI.
3. Check the air connection for leaks. Once you are satisfied there are no leaks, turn off the air
compressor and disconnect the tool.
Clean air of correct air pressure is recommended for the power supply for this tool. A maximum of 90
PSI at the tool is recommended for most air tools of this class. Check specifications section for
recommended pressure. (Depending on length of air hose and other circumstances, air pressure at
compressor may need to be increased to 100 PSI to ensure 90 PSI at the tool.)
Water in the air hose and compressor tank contributes to reduced performance and damage of the
air tool. Drain the air tank and filters before each use and as necessary to keep the air supply dry.
Hose length over 25’ causes loss in line pressure. Increase hose I.D. or increase compressor
pressure to compensate for the pressure loss. Use an in-line pressure regulator with gauge if air inlet
pressure is critical.
AIR SOURCE
13. Check for damaged parts. Before using any tool, any part that appears damaged should be
carefully checked to determine that it will operate properly and perform its intended function.
Check for alignment and binding of moving parts; any broken parts or mounting fixtures; and
any other condition that may affect proper operation. Any part that is damaged should be
properly repaired or replaced by a qualified technician.
14. Maintenance. For your safety, maintenance should be performed regularly by a qualified
technician using original PERFORMANCE TOOLS® replacement parts. Failure to do so can
lead to accidents for the operator. Use of any other parts will void the warranty. Only use
accessories intended for use with this tool. Approved accessories are available from
Performance Tool®. Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one tool may become hazardous when used on
another tool.
WARNING: Repetitive motions or exposure to vibration may be harmful to your hands and arms.
WARNING: Some dust created by power sanding contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm. An example of this type of chemical is
-lead from lead based paints,
-Crystalline Silica from bricks and cement or other masonry,
-Arsenic and Chromium from chemically treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce
your exposure: work in a well ventilated area and work with approved safety equipment, such as dusk
masks that are specially designed to filter out microscopic particles.
This product and its packaging contain a chemical known to the State of California to cause cancer,
birth defects, or other reproductive harm.
WARNING: The warnings, cautions, and instructions discussed in this instruction manual cannot
cover all possible conditions and situations that may occur. It must be understood by the operator that
common sense and caution are factors which cannot be built into this product, but must be supplied
by the operator. Read and understand all of the instructions provided in the instruction manual of this
product, as well as, any other tool (s) used with this product.

PARTS LIST
3
2
1
12
11
13
14
15
16
17
18
25
21
26
27
28
29
30
30
39
38
37
35
34
10
4
5
6
7
9
8
19
20
21
22
23
24
40
28
33
32
36
INDEX DESCRIPTION QTY INDEX DESCRIPTION QTY
1 Housing 1
2 Muffle Cover 1
3 Hosing Adaptor 1
4 Trigger 1
5 Trigger Pin 1
6 Safety Pin 1
7 Fixed Ring 1
8 Safety 1
9 Spring 1
10 Valve Bushing 1
11 O-Ring 1
12 O-Ring 1
13 Valve Stem 1
14 Spring 1
15 Air Regulator 1
16 O-Ring 1
17 Nut O-Ring 1
18 Nut 1
19 Rear Bearing 1
20 Rear Cover 1
21 Fixed Steel Ball 2
22 Cylinder 1
23 Rotor Blade 4
24 Rotor 1
25 Washer 1
26 Fixed Steel Ball 1
27 Front Cover 1
28 Front Bearing 2
29 Bevel Gear 1
30 Connect Nut 1
31 Clamp Nut 1
32 Angle Head 1
33 Grease Valve 1
34 Angle Bearing 1
35 Bevel Gear 1
36 Key 1
37 Drive Shaft 1
38 Fixed Nut 1
39 Collet 1
40 Collet Nut 1
INSUFFICIENT POWER:
Probable Cause Solution
Dirty or clogged air passages......... Flush and lubricate tool, drain air tank and supply line
Insufficient air supply...................... Increase line pressure, Make sure compressor
matches tool's air pressure and consumption needs
Air leakage...................................... Use PTFE tape at all fittings and joints. Check tool for
worn or damaged O-rings & seals.
Worn/damaged wear & tear parts... Replace as necessary.
Tool matching ................................. Be sure you are using a tool suited for the torque
requirements of the job at hand.
TROUBLESHOOTING
1 YEAR LIMITED WARRANTY
PERFORMANCE TOOL® extends only the following warranties, and only to original retail
purchasers. These warranties give specific legal rights. Except where prohibited by local law, the
law of the State of Washington governs all warranties and all exclusions and limitations of
warranties and remedies. There may be other rights which vary from state to state.
PERFORMANCE TOOL® warrants the product to be free from defects in materials and
workmanship under normal use and service. A defective product may be returned for a free
replacement within 90 days from the date of purchase, provided that product is returned to place of
purchase immediately after discovery of defect. After 90 days and up to one year from date of
purchase, PERFORMANCE TOOL® will replace at no charge any parts which our examination
shall disclose to be defective and under warranty. These warranties shall be valid only when a
sales receipt showing the date of purchase accompanies the defective product or defective part(s)
being returned. For part(s) after 90 days, please remit your request, postage prepaid to:
PERFORMANCE TOOL, P.O. Box 88259 Tukwila, WA 98138
These warranties exclude blades, bits, punches, dies, bulbs, fuses, hoses, and other consumables
which must be replaced under normal use and service. These warranties shall not apply to any
product or part which is used for a purpose for which it is not designed, or which has been repaired
or altered in any way so as to affect adversely its performance or reliability, nor shall these
warranties apply to any product or part which has been subject to misuse, neglect, accident or wear
and tear incident to normal use and service.
PERFORMANCE TOOL® does not authorize any other person to make any warranty or to assume
any liability in connection with its products.
Except for warranties of title and the limited express warranties set forth above, PERFORMANCE
TOOL® makes no express or implied warranties of any kind with respect to its products. In
particular, PERFORMANCE TOOL® makes no implied warranty of merchantability and no implied
warranty of fitness for any particular purpose, except that for goods purchased primarily for
personal, family or household use and not for commercial or business use, PERFORMANCE
TOOL® makes an implied warranty of merchantability (and, if otherwise applicable, an implied
warranty of fitness for a particular purpose), but only for the particular qualities or characteristics,
and for the duration, expressly warranted above. The laws on limitation of implied warranties may
differ from state to state, so the above limitations may not apply in all cases.
PERFORMANCE TOOL® shall not be liable for consequential, incidental or special damages
resulting from or in any manner related to any product, or to the design, use, or any inability to use
the product. The sole and exclusive remedy for a defective product or part shall be the repair, or
replacement thereof as provided above. The laws on limitation of remedies or on consequential,
incidental or special damages may vary from state to state, so the above limitations may not apply
in all cases.
© Copyright 2016 WILMAR CORPORATION, P.O. Box 88259 Tukwila, WA 98138