PT M574DB User manual

DUAL PISTON
STRAIGHT LINE SANDER
Stock Number M574DB
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 2020 WILMAR CORPORATION, P.O. Box 88259 Tukwila, WA 98138
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.
Some dust created by power sanding contains chemicals known to the State of California to cause cancer, birth defects or other reproduc-
tive 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 lter out microscopic particles.
OWNER'S MANUAL

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
Pad size .......................................... 2-3/4 x 16-3/4 in.
Air pressure ................................................90 PSI
Average air consumption .....................................5 C.F.M.
Free speed ............................................. 2,500 RPM
Air inlet (N.P.T.) .............................................. 1/4 in.
Hose size (I.D.) .............................................. 3/8 in.
Length ..................................................16-1/8 in.
Weight .................................................. 5.64 lbs.
SPECIFICATIONS
2
Specifications are subject to change without notice.
TOOL FEATURES
5. Rear Handle
6. Trigger
7. Air Inlet
1. 2-3/4 X 16-3/4 in. Sanding Pad
2. Front Paper Clamp
3. Rear Paper Clamp
4. Front Handle
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 Teflon 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.
WON’T START, STALLS:
Probable Cause Solution
Pistons are out of alignment........... Set the sander down on a solid surface or work bench.
Be cautious where you set it as the abrasive on the
sander may scratch the surface. Holding the forward
knob and handle draw the body of the tool back,
putting the shoe as far forward as possible. This
realigns the dual pistons and drive gear for normal
operation. This may need to be done prior to each use
depending on the shoe position.
TROUBLESHOOTING
1
23
45
6
7

IMPORTANT SAFETY INFORMATION
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 work piece 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.
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: 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.
36
PARTS LIST
INDEX DESCRIPTION QTY INDEX DESCRIPTION QTY
1 Air Inlet 1
2 Screw 7
3 Rear Cover 1
4 Spring 1
5 O-Ring 2
6 Valve Stem 1
7 Valve Plug 1
8 Valve Collar 1
9 Oil Cotton 4
10 Oil Cotton 1
11 Gasket 1
12 Flat Gear 4
13 Rivet 4
14 Piston 2
15 Piston Ring 4
16 Cylinder 2
17 Screw 4
18 Spring Pin 1
19 Trigger 1
20 Handle 1
21 Screw 2
22 Plug 1
23 O-Ring 1
24 Pin 1
25 Switch 1
26 Palm Handle 1
27 Housing 1
28 Front Cover 1
29 Wire Clip 7
30 Rivet 1
31 Compression Spacer 1
32 Fixed Plate 2
33 Screw 1
34 Foam Pad 1
35 Pad Plate 1
36 Rivet 4
37 Rivet 1
38 Pad Boat 1
39 Locking Nut 4
40 Slide Gear 4
41 Brass Plate 2
42 Screw 4
43 Transmission Gear 2
44 Gear Shaft 4
45 Switch Gear 1
46 Switch Sleeve 1
47 Boat Guide 1
48 Screw 2
49 Screw 1
50 Rivet 1
51 Plug 1
52 Needle Bearing 1
53 Front Gasket 1

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
YesNo
1. Do not put additional pressure on the machine. This will only slow down the speed of
the pad, reduce sanding efficiency and shorten the tool's life. We recommend the air
pressure of this grinder at 90 PSI.
2. Start the sander off the work, set it down on the work evenly and move it slowly back
and forth in wide, overlapping areas. When finished sanding, lift it off the work before
stopping motor.
3. Start the work with an abrasive grit just course enough to remove high spots and
roughness. Follow with additional sanding, using finer grits, until the desired finish is
obtained. Never go from a coarse grit to a fine grit in one step.
4. Lubricate the air motor with a good grade of air tool oil and drain the tank daily. Grit or
gum deposits in the tool may cut power and may be corrected by cleaning the air
strainer and flushing out the tool with gum solvent oil.
OPERATION
4
ASSEMBLY / INSTALLATION
1. You will need to prepare the 1/4 in. Quick-disconnect Coupler Plug to connect to the air
inlet on the sander. 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 in. 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 ft. 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
5