MK Diamond Products PX-3 User manual

DRY PAVER SAW
OWNER'S MANUAL &
OPERATING INSTRUCTIONS
PX-3 PAVER XTREME
READ SAFETY
AND GENERAL
INSTRUCTIONS
CAREFULLY
BEFORE USING
SAW FOR THE
FIRST TIME
serial number
You should record the serial number
of your saw on this owner’s manual
and on the warrranty card, which must
be sent in, to be effective. be sure
to include all pertinent information
required.
Part No. 160445
Revision 01/04
CAUTION
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SAFETY INSTRUCTIONS FOR THE PX-3 PAVER SAW
Congratulations on your purchase of a PX-3 Paver Saw. We are certain that you will be pleased with your
purchase. MK Diamond takes pride in producing the finest construction power tools and diamond blades in the
industry.
Operated correctly, your PX-3 should provide you with years of service. In order to help you, we have included
this manual. This owners manual contains information necessary to operate and maintain your PX-3 safely and
correctly. Please take a few minutes to familiarize yourself with the PX-3 by reading and reviewing this manual.
If you should have questions concerning your PX-3 , please feel free to call our friendly customer service
department at: 800 421-5830
Regards,
MK Diamond

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TABLE OF CONTENTS
MK Diamond may have patents, patent applications, trade marks, copyrights of other
intellectual property right covering this product in this document.
© 2003 MK Diamond Products, All Rights Reserved
www.mkdiamond.com
SAFETY
SAFETY MESSAGES _________________________________________________4
DAMAGE PREVENTION AND INFORMATION MESSAGES ___________________4
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS ________________4
CALIFORNIA PROPOSITION 65 MESSAGE _______________________________6
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS ___________8
SAFETY LABEL LOCATIONS__________________________________________10
PAVER SAW SPECIFIC WARNINGS ____________________________________10
PRODUCT SPECIFICATIONS _________________________________________11
UNPACKING, TRANSPORT, STAND and ASSEMBLY
UNPACKING _______________________________________________________12
CONTENTS ________________________________________________________12
TRANSPORT_______________________________________________________12
ASSEMBLY ________________________________________________________13
SETUP, ADJUSTMENT & OPERATION
SETUP____________________________________________________________14
PRE-START INSPECTION ____________________________________________14
ADJUSTMENT & OPERATION _________________________________________15
CLEANUP _________________________________________________________17
MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE_____________________________________________________18
TROUBLESHOOTING________________________________________________22
EXPLODED VIEW AND PARTS LIST
EXPLODED VIEW___________________________________________________23
PARTS LIST _______________________________________________________24
THEORY
THEORY OF DIAMOND BLADES_______________________________________26
ACCESSORIES
ACCESSORIES_____________________________________________________27
ORDERING & RETURN INSTRUCTIONS
ORDERING INFORMATION ___________________________________________28
RETURN MATERIALS POLICY ________________________________________28
PACKAGING INSTRUCTIONS _________________________________________28
AUTHORIZED SERVICE CENTERS ____________________________________28

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SAFETY
Read and follow all safety, operating and maintenance instructions. Failure to read and follow these instructions
could result in injury or death to you or others. Failure to read and follow these instructions could also result in
damage and/or reduced equipment life.
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Adhere to safety guidelines: ANSI American National Standards Institute, OHSA, or local Regulations.
Never operate the saw with out the guards in place!
Before using this equipment, ensure that the person operating this machine has read and understands
all of the instructions in the manual. Precaution is the best insurance against accidents. Read and
understand all safety precautions, messages, warnings and hazard symbols. You are responsible for your
own safety.
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READ OWNERS MANUAL BEFORE USE
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KEEP GUARDS IN PLACE
DANGER
!
WARNING
!
CAUTION
!
SAFETY MESSAGES:
Safety messages inform the user about potential hazards that could lead to injury, death and/or equipment
damage. Each safety message will be preceded by one of the following (3) three words that identify the severity
of the message.
A Damage Prevention Message is to inform the user of important information and/or instructions that could lead
to equipment or other property damage if not followed. Information Messages convey information that pertains
to the equipment being used. Each message will be preceded by the word NOTE, as in the example below.
DAMAGE PREVENTION AND INFORMATION MESSAGES:
NOTE: Equipment and/or property damage may result if these instructions are not followed.
In order to prevent injury, the following safety precautions and symbols should be followed at all times!
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS:
Safety Precautions:
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REMOVE ADJUSTING KEYS AND WRENCHES
Form a habit of checking to see that keys and adjusting wrenches are removed from the power tool
before it is turned on.
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KEEP WORK AREA CLEAN
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DO NOT USE IN DANGEROUS PLACES
Cluttered work areas and benches invite accidents.
Do not use power tools in damp or wet locations nor expose them to rain. Always keep the work area
well lighted.
Not following instructions WILL lead to DEATH or SERIOUS INJURY
Not following instructions COULD lead to DEATH or SERIOUS INJURY
Not following instructions CAN lead to injury.
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KEEP CHILDREN AWAY
All visitors and children should be kept a safe distance from work area.

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If using an extension cord make sure it is in good condition first. When using an extension cord, be sure
to use one heavy enough to carry the electrical current your product will draw. An undersized extension
cord will cause a drop in line voltage that will result in a loss of power and overheating. TABLE 1, Page
9 shows the correct AWG size to use depending on cord length and nameplate ampere rating. If in
doubt, use the next heavier gage. The smaller the gage number, the heavier the cord.
SAFETY
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USE THE PROPER EXTENSION CORD
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USE PROPER APPAREL
Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may be caught in
moving parts. Non-slip footwear is recommended. Wear protective hair covering to contain long hair.
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ALWAYS USE SAFETY GLASSES
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Safety glasses should always be worn when working around power tools. In addition, a face,
dust mask or respirator should be worn if a cutting operation is dusty. Everyday eyeglasses
only have impact resistant lenses and may not prevent eye injury-they are NOT safety glasses.
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DO NOT OVERREACH
Keep proper footing and balance at all times by not overreaching.
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SECURE WORK
Clamps or a vise should be used to hold work whenever practical. Keeping your hands free to operate
a power tool is safer.
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MAINTAIN TOOLS WITH CARE
Keep tools clean for the best and safest performance. Always follow maintenance instructions for
lubricating, and when changing accessories.
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DISCONNECT TOOLS
Power tools should always be disconnected before servicing or when changing accessories, such as
blades, bits, cutters, and the like.
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REDUCE THE RISK OF UNINTENTIONAL
START
Make sure the ON/OFF switch is in the OFF position before plugging in a power tool.
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MAKE THE WORKSHOP KID PROOF
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
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DO NOT FORCE THE TOOL
A power tool will do a job better and safer operating at the rate for which it was designed.
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USE THE RIGHT TOOL
Do not force a tool or an attachment, to do a job that it was not designed to do.

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SAFETY
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USE RECOMMENDED ACCESSORIES
Consult the owner’s manual for recommended accessories. Using improper accessories may increase
the risk of personal or by-stander injury.
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NEVER STAND ON THE TOOL
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.
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CHECK FOR DAMAGED PARTS
Before using a power tool, check for damaged parts. A guard or any other part that is damaged should
be carefully checked to determine it would operate properly and perform its intended function. Always
check moving parts for proper alignment or binding. Check for broken parts and mountings and all other
conditions that may affect the operation of the power tool. A guard, or any damaged part, should be
properly repaired or replaced.
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DIRECTION OF FEED
Always feed work into a blade or cutter against the direction of rotation. A blade or cutter should always
be installed such that rotation is in the direction of the arrow imprinted on the side of the blade or cutter.
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NEVER LEAVE A TOOL UNATTENDED
TURN POWER OFF - Do not leave a tool until it comes to a complete stop. Always turn a power tool
OFF when leaving the work area, or, when a cut is finished.
Some dust created by power sanding, sawing, grinding, drilling, and other construction
activities contain chemicals known [to the State of California] to cause cancer, birth defects or
other reproductive harm. Some examples of these chemicals are:
• Lead, from lead-based paints
• Crystalline silica, from bricks and cement and other masonry products and
• Arsenic and chromium, from chemically treated lumber
For further information, consult the following sources:
http://www.osha-slc.gov/sltc/silicarystalline/index.html
http://www.oehha.org/prop65/out_of_date/6022kLstA.html
Your risk from these exposures varies depending on how often you do this type of work. To reduce your
exposure to these chemicals, work in a well-ventilated area, and work with approved safety equipment, such as
those dust masks that are specially designed to filter out microscopic particles.
CALIFORNIA PROPOSITION 65 MESSAGE:
WARNING
!

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Sawing and drilling generates dust. Excessive airborne particles may cause irritation to eyes,
skin and respiratory tract. To avoid breathing impairment, always employ dust controls and
protection suitable to the material being sawed or drilled; See OSHA (29 CFR Part 1910.1200). Diamond
Blades improperly used are dangerous. Comply with American National Standards Institute Safety Code, B7.1
and, Occupational Safety and Health Act covering Speed, Safety Guards, Flanges, Mounting Procedures,
General Operating Rules, Handling, Storage and General Machine Conditions
Hazard Symbols:
Never touch electrical wires or components while the engine is running. They can be sources of
electrical shock which could cause severe injury or burns.
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Electrical Shock!
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the
engine with covers, shrouds, or guards removed.
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Rotating Parts!
Never tamper with the governor components or settings to increase the maximum speed. Severe
personal injury and damage to the engine or equipment can result if operated at speeds above
maximum.
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Over Speed!
WARNING
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SAFETY

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ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS:
In order to prevent potential electrical shock and injury, the following electrical safety precautions and symbols
should be followed at all times!
WARNING
!
In case of a malfunction or breakdown, grounding provides a path of least resistance for electric current
to reduce the risk of electric shock. This tool is equipped with an electric cord having an equipment-
grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is
properly installed and grounded in accordance with all local codes and ordinances.
• Do not modify the plug provided – if it will not fit the outlet; have the proper outlet installed by a
qualified electrician
• Improper connections of the equipment-grounding conductor can result in a risk of electric shock.
The equipment-grounding conductor is the insulated conductor that has an outer surface that
is green, with or without yellow stripes. If repair or replacement of the electric cord or plug is
necessary, do not connect the equipment-grounding conductor to a live terminal
• Check with a qualified electrician or service personnel if the grounding instructions are not
completely understood, or if in doubt as to whether the tool is properly grounded
• Use only 3-wire extension cords that have 3-prong grounding plugs and 3-pole receptacles that
accept the tool’s plug
• Repair or replace a damaged or worn cord immediately
WARNING
!
This tool is intended for use on a circuit that has an outlet that looks like the one shown in Sketch A of
Figure 1. The tool has a grounding plug that looks like the plug illustrated in Sketch A of FIGURE 1. A
temporary adapter, which looks like the adapter illustrated in sketches B and C, may be used to connect
this plug to a 2-pole receptacle as shown in Sketch B, if a
properly grounded outlet is not available. The temporary adapter
should be used only until a properly grounded outlet can be
installed by a qualified electrician. The green-colored rigid ear,
lug, and the like, extending from the adapter, must be connected
to a permanent ground such as a properly grounded outlet box.
NOTE:
Use of a temporary adapter is not permitted in Canada
FIGURE 1
WARNING
!
To reduce the risk of electrocution, keep all connections dry and off the ground.
Use only extensions cords that are intended for outdoor use. These extension cords are marked
“Acceptable for use with outdoor appliances; store indoors while not in use.” Use only extension cords
having an electrical rating not less than the rating of the product. Do not use damaged extension cords.
Examine extension cords before using and replace if damaged. Do not abuse extension cords and do
not yank on any cord to disconnect. Keep cords away from heat and sharp edges. Always disconnect
the extension cord from the receptacle before disconnection the product form the extension cord.
SAFETY

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WARNING
!
Use of under size extension cords result in low voltage to the motor that can result in motor burnout
and premature failure. MK Diamond warns that equipment returned to us showing signs of being run
in a low voltage condition, through the use of undersized extension cords will be repaired or replaced
totally at the customers expense. There will be no warranty claim.
To choose the proper extension cord,
• Locate the length of extension cord needed in TABLE 1 below.
• Once the proper length is found, move down the column to obtain the correct AWG size required
for that length of extension cord.
Extension Cord Minimum Gage for Length
Volts Total Length of Cord in Feet
120 V 25 ft. 50 ft. 100 ft. 150 ft.
AWG AWG AWG AWG
14 12 Not Recommended
TABLE 1
SAFETY

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SAFETY LABEL LOCATIONS
Safety labels are located according to TABLE 2 below. The labels contain important safety information. Please
read the information contained on each safety label. These labels are considered a permanent part of your saw.
If a label comes off or becomes hard to read, contact MK Diamond or your dealer for a replacement
SAFETY
PAVER SAW SPECIFIC WARNINGS:
Wear eye protection.
Disconnect saw before servicing, when changing cutting blades, and cleaning.
Replace damaged cutting blade before operating.
WARNING
!
Item Description Part No.
1 Proposition 65 Warning Label 158322
2 Extension Cord Warning Label 155672
3 Safety Caution Label 155576
TABLE 2: SAFETY LABEL LOCATIONS
1
2
3

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SAFETY
PRODUCT SPECIFICATIONS
The PX-3 is a versatile lightweight, dry, masonry saw. Operated and used according to this manual, the PX-3
will provide years of dependable service.
General Description
Motor Specifications
Blade Capacity:
Paver Types:
The PX-3 Paver Xtreme is engineered as a 14” dry saw, consisting of a powerful 115v motor in a hard plastic
case. The saw has a five (5) inch cutting depth.
Motor specifications for the PX-3 are listed in TABLE 3 below.
Voltage 115V
Overall Amperage 13 A
Frequency 60Hz
RPM 3500 rpm
Table 3
The PX-3 uses a specially designed 14-inch diameter segmented dry MK Diamond blade with a 0.110 in. cutting
width.
The PX-3 can cut a variety of masonry types including slump stone block, wall brick, paver brick, roofing tile,
marble, granite, decorative rock, or almost any other non-ferrous material.
NOTE: The PX-3 is not designed to cut plastic or ferrous (metals) material.
Lockable Trigger Switch:
The PX-3 is designed with a lockable trigger-operating switch in the handle to allow for ease of operation.
Removable Motor Air Filter
The PX-3 is designed with an easy clean motor air filter to extend the life of the motor.
Replaceable Motor Brushes:
The PX-3 is designed with replaceable motor brushes to extend operating life.
Dust Collector:
The PX-3 is designed with a Dust Collector nozzle that can be used to remove dust from the Cutting Area, using
your shop vacuum’s 2-1/2 inch diameter hose.

Blade Wrench Owner's ManualShaft Wrench Warranty Card
Segmented Dry
Diamond Blade
PX-3 Replacement Motor
Air Filter
Dust
Nozzle
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UNPACKING, TRANSPORT, STAND and ASSEMBLY
UNPACKING
CONTENTS
TRANSPORT:
CAUTION
!1. The PX-3 weighs approximately thirty five (35) pounds, making transport easy.
2. Always observe safe lifting practices when lifting the PX-3
Due to its lightweight construction, the PX-3 is designed to be carried by the durable aluminum frame. Simply
lock the spring assisted cutting head in the DOWN position, grasp the frame by the lower front and upper back
cross members, then lift and transport the PX-3 to the desired work location.
Your PX-3 has been shipped from the factory thoroughly inspected. Only minimal assembly is required.
If not already done, remove the PX-3 from the carton and place it on a flat surface. Remove strapping.
Remove the accessories box from the main carton and place along side the PX-3. Note: The Owners Manual is
in the accessories box.
In the PX-3 packaging containers you will find:
• PX-3 Dry Paver Saw • One Blade Wrench
• One 14 inch Segmented Dry Diamond Blade (or Segmented Block Blade) • One Shaft Wrench
• One Replacement Motor Air Filter • One Owner’s Manual
• One Dust Nozzle • One Warranty Card
NOTE: Lock the Cutting Head in the DOWN position using the Locking Pin when transporting the PX-3
Lift Points
Cutting Head

(D)
Install Blade Retaining Screw
and Outer Flange – tighten.
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UNPACKING, TRANSPORT, UNIVERSAL STAND and ASSEMBLY
ASSEMBLY:
Follow the assembly instructions to prepare your PX-3 for operation.
1. Diamond Blade Installation
NOTE: When installing the Retaining Screw, do not "cross-thread" and DO NOT over tighten the screw.
(B)
Remove Blade Retaining
Screw and Outer Flange.
(A)
Identify Blade Retaining
Screw and Outer Flange.
(C)
Install and seat Blade –verify
rotation.
2. Dust Nozzle
Dust Nozzle
Attach Dust Nozzle with
Shoulder Thumb Screw
and Washer Nut
The PX-3 Dust Nozzle assists on the removal of dust and debris from the cutting area. Its shape is designed
so it directs the flow of these particles to the shop vac hose (NOT INCLUDED). The hose required is a 2-1/2" in
diameter. Connect the hose from your shop vac (NOT INCLUDED) to the Dust Collector Outlet located at the
rear of the PX-3 Cutting Area.

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SETUP, ADJUSTMENT & OPERATION
SETUP:
• Before powering or starting, check for damage that could prevent this equipment from
proper operation or performing its intended function. Check for binding and alignment of
moving parts. Check for damaged, broken, or missing parts.
• Verify the trigger switch-locking button is in the RELEASE position.
• Before connecting the PX-3 to a power supply, be sure the voltage, cycle and phase of the
job site power source meet the following requirements:
CAUTION
!
• If using an extension power cord, make sure the length and wire gauge corresponds to
the requirements listed in TABLE 1 on page 9 . An extension power cord that is too small
in wire gauge (diameter), or too long in length, will cause the motor to overheat and could
cause premature failure.
• Do not cover the motor vents. This could lead to motor overheating.
VOLTAGE 115V
CYCLE 60Hz
PHASE 1-phase
TABLE 3
1. Inspect the Blade for damage. Verify the Blade is correct for the material being cut.
2. Inspect the PX-3 for damage.
3. Inspect the Motor Air Filter for cleanliness.
4. Verify the Trigger Switch is unlocked.
5. Plug the Power Cord into a power source.
NOTE:
Portable Generator:
If using a portable generator to provide power, ensure the generator meets the following minimum requirements:
8kW 120/240 66.7/33.3 Amps Single Phase
PRE-START INSPECTION
In order to avoid breaker tripping, a 20-amp circuit breaker should be used.
The pre-start inspection should be performed before beginning any job.
CAUTION
!If the Diamond Blade shows signs of fatigue cracking, replace the Blade before starting work.
(See Diamond Blade Change-Out section on Page )
1
2
3
4
5

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SETUP, ADJUSTMENT & OPERATION
ADJUSTMENT & OPERATION
Chop Cutting:
A chop cut is performed by cutting completely through an object in one pass. The following section describes the
correct procedure for performing a chop cut.
1. Position the Back Stop for a cross cut or rip cut.
2. Position the work against back stop.
3. Depress the Trigger Switch to start. Lower the Cutting Head to begin cutting.
4. Continue lowering the Cutting Head until the cut is complete.
5. When cutting is complete, raise the Cutting Head and release the Trigger Switch.
Position work against back
stop and perform the Cut
Back Stop in Forward
position for Cross Cut
Position Back Stop in
Backward Location
and thighten both the
knob and wing nut
CAUTION
!Allow the Blade to stop moving before removing work
6. Remove work from the cutting area.
Loose wingnut located
underneath the table
Loose knob
Position work against back
stop as shown
and perform the cut
Rip Cutting:
Cross Cutting:

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SETUP, ADJUSTMENT & OPERATION
Angle Cutting:
Angle cuts are performed using the chop cut method. For angle cuts the Adjustable Back Stop is removed and
repositioned. The following section describes the correct procedure for performing an angle cut.
1. Remove and position the Adjustable Back Stop.
2. Position the Back Stop for an angle cut.
3. Position the work below the Cutting Head.
4. Depress the Trigger Switch to start. Lower the Cutting Head to begin cutting.
5. Continue lowering the Cutting Head until the cut is complete.
6. When cutting is complete, raise the Cutting Head and release the Trigger Switch.
(B)
Pivot the back stop to the
desired angle
(A)
Loose the knob
(C)
Now the back stop is ready
CAUTION
!Allow the Blade to stop moving before removing work
7. Remove work from the cutting area.
(D)
Place work against the back
stop and perform the cut

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SETUP, ADJUSTMENT & OPERATION
CLEANUP
Clean the Air Filter and PX-3 surfaces after each use. The following section describes the correct procedure for
cleaning your PX-3.
1. Unplug the PX-3 from its power source.
2. Remove the Motor Filter Cap. The Filter Cap pops on and off without removing the retaining screws.
3. Clean the Filter by removing it from the Filter Cap and tapping it on a hard surface, or use compressed air.
CAUTION
!Always wear eye protection when using compressed air.
4. Reinstall Filter into Filter Cap and replace it on the PX3 Motor.
5. Clean the remainder of the PX-3 by wiping its surfaces with a clean cloth.
(B)
Remove Motor
Filter Cap
(A)
Unplug the PX-3 from
Power Source
(C)
Remove Filter
(D)
Clean up Filter by tapping
it on a hard surface or use
compressed air.
(E)
Reinstall Filter into Filter Cap
and place them back on to the
PX-3 unit
(E)
Clean the remainder of
the PX-3

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MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE
General Maintenance
It is important to lubricate the Cutting Head Torsion Spring after each use. Use light oil such as WD-40 or 3-in-1
when lubricating parts.
Lubricate Torsion Spring
(B)
Clean the Blade Retaining
Screw
(A)
Clean and inspect the Inner
Flange and Motor Shaft
Monthly Maintenance:
The following maintenance should be performed Monthly. Items should be inspected as described below.

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MAINTENANCE AND TROUBLESHOOTING
Like most cutting instruments, a Diamond Blade performs best when it is dressed. Over time and use,
diamonds on the outer edge will become smooth or “glazed” over. This will reduce grinding efficiency and may
cause the blade to “wander” or bend, giving the illusion of an alignment problem. When this occurs, the blade
will need to be dressed. The diamond blade can be dressed using the MK Dressing Stick (part number 152792)
and by following the steps below.
1. Set up the PX-3 for operation.
2. Position the Back Stop to accommodate the Dressing Stick.
3. Hold the Dressing Stick in position and depress the Trigger to start. Lock if desired.
4. Lower the Cutting Head while pushing the Dressing Stick into the Blade.
BLADE DRESSING
(B)
Position the Back Stop to
accomodate the
Dressing Stick
(A)
Set up the PX-3 for operation
(C)
Place Dressing Stick and
perform cut, repeat cut eight
(8) times
CAUTION
!Allow the Blade to stop moving before removing work
5. Repeat the cut stroke eight (8) times.
6. When the Blade is dressed, release the Trigger Switch and raise the Cutting Head. Allow Blade to stop
moving before removing the Dressing Stick.

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MAINTENANCE AND TROUBLESHOOTING
Change the Diamond Blade when it becomes worn, cracked, or damaged. The following section describes the
correct procedure for changing out the Diamond Blade.
DIAMOND BLADE CHANGE OUT
(B)
Remove Retaining Nut and
Outer Flange
(A)
Unplug the PX-3 from its
Power Source
(C)
Remove Diamond Blade from
Blade Shaft
(E)
Install the Retaining Nut and
Outer Flange and then tighten
using the Blade and Shaft
Wrenches
(D)
Install the Diamond Blade
onto Blade Shaft. Ensure that
it is seated properly on the
Flange.
Disconnect the tool before servicing and when changing accessories, such as blades, bits, cutters, and
the like.
WARNING
!