MK Diamond Products 172023-K User manual

06.2019
SRX-150
EARLY ENTRY CONCRETE SAW
OWNER’S MANUAL
& PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This owner’s manual
MUST accompany the equipment at all times.
Revision 111
Manual Part# 172023-OM
MODEL P/N
SRX-150 Honda 172023-H
SRX-150 Kohler 172023-K

2
INTRODUCTION
Congratulations on your purchase of a the SRX-150 Early Entry Concrete Saw. We are certain
that you will be pleased with your purchase. MK Diamond takes pride in producing the nest
construction power tools and diamond blades in the industry.
Operated correctly, your SRX-150 Early Entry Concrete Saw 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 SRX-150 Early Entry Concrete Saw safely
and correctly. Please take the time to familiarize yourself with the SRX-150 Early Entry Con-
crete Saw by reading and reviewing this manual.
Read and follow all safety, operating and maintenance instructions.
If you should have questions concerning your SRX-150 Early Entry Concrete Saw, please feel
free to call our friendly customer service department at: 800 421-5830
Regards,
MK Diamond
NOTE THIS INFORMATION FOR FUTURE USE:
MODEL NUMBER:
SERIAL NUMBER:
PURCHASE PLACE:
PURCHASE DATE:
WARRANTY: For your (1) one year warranty to be effective, complete the online Product
Registration as soon as possible. Visit www.mkdiamond.com/registration/

3
TABLE OF CONTENTS
SAFETY
Safety Messages 4
Damage Prevention Message 4
General Safety Precautions and Hazard Symbols 5-7
California Proposition 65 Message 8
Prestart Safety 9
Safety Label Locations 10
Product Specications 11
UNPACKING, TRANSPORT and ASSEMBLY
Unpacking 12
Contents 12
Transport 13
Assembly 14-16
STARTUP, OPERATION and SHUTDOWN
Startup 17
Operation 18-21
Shutdown 21
Cleanup 21
MAINTENANCE AND TROUBLESHOOTING
Maintenance 22-26
Troubleshooting 27
EXPLODED VIEW & PARTS LISTS 28-41
ORDERING and RETURN INSTRUCTIONS
Accessories 42
Ordering Information 44
Return Material Policy 44
Packaging Instructions 44
Authorized Service Centers 44
Warranty 45

4
EARLY ENTRY CONCRETE SAW 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. Safety warnings and
guidelines do not by themselves eliminate danger. They are not substitutes for proper accident
prevention procedures and good judgement.
SAFETY MESSAGES
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.
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS
A safety message alerts you to potential hazards that could hurt you or others. Each safety message is
preceded by a safety alert symbol ( ) and one of three words: DANGER, WARNING, or CAUTION.
DANGER You WILL be KILLED or SERIOUSLY INJURED if you DO NOT follow directions.
WARNING You CAN be KILLED or SERIOUSLY INJURED if you DO NOT follow directions.
CAUTION You CAN be INJURED if you DO NOT follow directions. It may also be used to
alert against unsafe practices.
ALWAYS read this Owner’s Manual before operating the machine. DO NOT operate or
service this equipment before reading this entire manual. Read and understand all warn-
ings, instructions and controls on the machine. Know how to stop the equipment quickly in
case of emergency. It is the operators responsibility to use this machine under safe work-
ing conditions and conform with federal, state and local codes or regulations pertaining to
safety, air, pollution, noise etc...
ALWAYS keep the Blade and Belt Guards in place. DO NOT operate this machine with any
guard or safety device removed. A Guard, or any damaged part should be repaired or
replaced immediately.
NEVER operate this equipment without proper protective clothing, shatterproof
glasses, steel-toed boots and other protective devices required by the job. Non-slip
foot wear is recommended.
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In order to prevent injury, the following safety precautions and symbols should be followed at all times!

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EARLY ENTRY CONCRETE SAW SAFETY
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All visitors and children should be kept a safe distance from work area. Maintain a safe
operating distance to other personnel.
KEEP CHILDREN AWAY
MAKE THE WORKSHOP KID PROOF
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
ROTATING PARTS
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never oper-
ate the motor with covers, shrouds, or guards, removed.
OVER SPEED
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.
ELECTRICAL SHOCK
NEVER touch electrical wires or components while the engine is running. Exposed, frayed or
worn electrical wiring and plugs can be sources of electrical shock which could cause severe
injury or burns. Do not touch the plug with wet hands.
ALWAYS avoid inhalation of and skin contact with silica dust and/or mist. Provide proper
dust removal. Use dust-collection system when applicable.
NEVER operate the machine in an explosive atmosphere or near combustible materials.
Sparks from the cutting-action of this machine can ignite flammable materials, liquids, gases
or dust.
This equipment should not be operated by persons under 18 years of age.
ALWAYS wear approved respiratory, head, ear and eye protection
when operating this machine.
Before starting the engine/motor, be sure the ON/OFF switch is in the OFF position to pre-
vent accidental starting. Place the ON/OFF switch in the OFF position before performing any
service operation. ALWAYS place the power ON/OFF switch in the OFF position when the
machine is not in use.
ACCIDENTAL STARTS!
PERSONAL PROTECTIVE EQUIPMENT
Engine components can become extremely hot from operation. To prevent severe burns,
do not touch these areas while the engine is running, or immediately after it is turned off.
Never operate the engine with heat shields removed.
HOT PARTS!
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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.
DO NOT force a tool or an attachment to do a job that it was not designed to do.
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6
EARLY ENTRY CONCRETE SAW SAFETY
Consult the owner’s manual for recommended accessories. Using improper accessories
may increase the risk of personal or by-stander injury. Unauthorized equipment
modifications will void all warranties. Manufacturer does not assume responsibility for any
accident due to equipment modifications.
ALWAYS ensure that the machine is on level ground before using.
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally
contacted.
When loading or unloading the machine, use caution. Remove the blade prior to hoisting,
loading and transporting the machine.
USE RECOMMENDED ACCESSORIES
NEVER STAND ON THE TOOL
TRANSPORT
Form a habit of checking to see that keys and adjusting wrenches are removed from
the power tool before it is turned on.
Cluttered work areas and benches invite accidents. Keep area around machine clear of
obstructions which could cause persons to fall.
DO NOT operate equipment in dangerous or hazardous environments. DO NOT use power
tools in damp or wet locations nor expose them to rain. Always keep the work area well
lighted.
REMOVE ADJUSTING KEYS AND WRENCHES
KEEP WORK AREA CLEAN
DO NOT USE IN DANGEROUS PLACES
MAINTAIN TOOLS WITH CARE
Keep tools clean and maintained for the best and safest performance. Always follow
maintenance instructions and examine the machine before use. If any abnormal vibrations
or noises occurs, turn off machine immediately and have the problem corrected before
further use.
DISCONNECT TOOLS
Power tools should always be disconnected before servicing, adjusting or when changing
accessories, such as blades, bits, cutters, and the like.
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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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 cover-
ing to contain long hair.
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EARLY ENTRY CONCRETE SAW SAFETY
Before using a power tool, check for damaged parts. A guard or any other part that is
damaged should be carefully checked to determine if 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. Always check the machine for loose bolts before starting.
A blade or cutter should always be installed so that rotation is in the direction of the
arrow imprinted on the side of the blade or cutter. It should correspond with the rotational
direction of the motor. Always feed work into a blade against the direction of rotation.
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.
NEVER LEAVE A TOOL UNATTENDED
CHECK FOR DAMAGED PARTS
DIRECTION OF ROTATION
NEVER disconnect any "emergency or safety devices". These devices are intended for
operator safety. Disconnection of these devices can cause severe injury, bodily harm, or
even death! Disconnection of any of these devices will void all warranties. Unauthorized
equipment modifications will void all warranties. Manufacturer does not assume
responsibility for any accident due to equipment modifications.
NEVER operate this equipment under the influence of drugs or alcohol.
NEVER operate this equipment when not feeling well due to fatigue, illness or taking medicine.
NEVER use this machine with any cutter designed for woodworking.
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On belt driven equipment, overtensioning of belts will result in premature crank and/or bearing
failure.
Whenever necessary, replace nameplate, operation and safety decals when they become
difcult to read.
ALWAYS store equipment properly when it is not being used. Equipment should be stored in
a clean, dry location out of the reach of children
DO NOT lend or rent this equipment without including the Owner's Manual and the Engine/
Motor Manufacturer's Manual.
Check the chemical properties of the material to be cut/grinded and follow all EPA/OSHA
Regulations. (cut/ground)

8
EARLY ENTRY CONCRETE SAW SAFETY
CALIFORNIA PROPOSITION 65 MESSAGE
SILICA DUST WARNING
Grinding/cutting/drilling of masonry, concrete, metal and other materials with silica in their composition
may give off dust or mists containing crystalline silica. Silica is a basic component of sand, quartz,
brick clay, granite and numerous other minerals and rocks. Repeated and/or substantial inhalation of
airborne crystalline silica can cause serious or fatal respiratory diseases, including silicosis. In ad-
dition, California and some other authorities have listed respirable crystalline silica as a substance
known to cause cancer. When cutting such materials, always follow respiratory precautions.
Use appropriate NIOSH-approved respiratory protection where dust hazard may occur. Paper masks
or surgical masks without a NIOSH approval number are not recommended because they do little to
protect the worker. For more information about respirator programs, including what respirators have
received NIOSH approval as safe and effective, please visit the NIOSH website at:
http://www.cdc.gov/niosh/topics/respirators
Observe OSHA regulations for respirator use (29 C.F.R.§1910.134).
Visit http://www.osha.gov for more information.
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities con-
tain 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
• Arsenic and chromium, from chemically treated lumber
For further information, consult the following sources:
http://www.osha.gov/dsg/topics/silicacrystalline/index.html
http://www.cdc.gov/niosh/docs/96-112/
http://oehha.ca.gov/prop65/law/P65law72003.html
http://www.dir.ca.gov/Title8/sub4.html
http://www.P65warnings.ca.gov
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 dust masks that are specially designed to lter out microscopic particles. Where
use of a dust extraction device is possible, it should be used. To achieve a high level of dust collec-
tion, use an industrial HEPA vacuum cleaner. Observe OSHA 29 CFR part 1926.57 and 1926.103.

9
EARLY ENTRY CONCRETE SAW SAFETY
Gasoline is extremely ammable, its vapors can explode if ignited; store only in approved
containers, in well-ventilated, unoccupied buildings and away from sparks or ames. DO
NOT ll the fuel tank while the engine is running or hot. Spilled fuel could ignite if it con-
tacts hot parts or sparks from ignition. DO NOT overll tank. DO NOT start the engine near
spilled fuel. Never use gasoline as a cleaning agent.
Gasoline models are shipped from the factory dry, meaning without fuel or oil. Both must be added
before equipment can be used. Check the engine Manufacturer Owner's Manual for instructions on
fueling, break-in, servicing and proper engine care and use.
Refer to engine manufacturer manual for specic operating procedures and safety warnings.
ALWAYS check the fuel lines and fuel tanks for leaks and cracks before starting the engine.
DO NOT run the machine if fuel leaks are present or the fuel lines are loose.
Accidental start hazard. Disconnect spark plug prior to servicing.
EXPLOSIVE FUEL!
GAS SAFETY PRECAUTIONS
GAS ENGINE SAFETY
Engine exhaust gasses contain poisonous carbon monoxide (an odorless, colorless gas).
Avoid inhaling exhaust fumes Breathing it can cause unconsciousness and even kill you.
Always operate gasoline engine machines in a well-ventilated area. DO NOT operate in ar-
eas where exhaust fumes could accumulate without wearing appropriate respiratory protec-
tion. Never run the engine in a closed building or conned area.
LETHAL EXHAUST GASES!
ALWAYS rell fuel tank in a well-ventilated area.
ALWAYS replace the fuel tank cap after refueling.
ALWAYS close fuel value on engines when machine is not being operated.
FUELING SAFETY
ALWAYS use caution when handling fuel. Shut off the engine and allow to cool before refueling.
Move the machine at least 10 feet (3 meters) from the fueling point before starting the engine, and
make sure the gas cap is on the machine and the fuel can is properly tightened.
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NOTE: Prior to operation of this machine the operator must determine the existence and
location of any subsurface features that may be hazardous or could damage the
equipment, (i.e. electric cable, natural gas line etc.).

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OPERATION & SAFETY DECALS
Part # 164202
A
B C
E
H
F
I
D
Part # 155587 (2)
CAUTION
DO NOT
operate without
guards in place.
!
Part # 154398
DO NOT operate
this equipment
before reading the
owner’s manual.
WARNING
!
Part # 155038
SERVICE OR
WARRANTY
FOR INFORMATION ON
PLEASE CALL
1-800-474-5594
Part # 170480
Part # 155582
CAUTION
DO NOT
touch hot
surface.
!
Part # 155578
Part # 155580
Part # 172641
WARNING
When refueling
stop engine and
allow to cool.
DO NOT
overll tank.
!
DANGER
Lethal exhaust
gases. Use only
in well ventilated
areas. DO NOT
use indoors.
J
Part # 155579
CAUTION
Accidental start hazard.
Disconnect spark plug prior
to servicing.
!
G
WARNING: This equipment contains chemicals known to
the State of California to cause cancer and birth defects or other
reproductive harm. These chemicals are contained in various
components, fluids and paint, including but not limited to, fuel, oil,
electric motors and batteries. In addition, gasoline/diesel powered
equipment emits engine exhaust and fumes, and when serviced,
cleaned or maintained generate used oil, waste fluids, fumes,
grease, grime and particulates from component wear and silica dust
which contain chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov.
!
WARNING
• Use of this equipment can expose you to chemicals
including nickel and crystalline silica which are known to
the State of California to cause cancer.
• For more information go to www.P65Warnings.ca.gov.
• Repeated and/or substantial inhalation can cause
serious or fatal respiratory diseases including silicosis.
• Employ dust controls and protection per
OSHA/NIOSH/MSHA.
!
Label Part #164202
Location Description
AGas Tank/Side Warning - Silcia
BHandle Read Manual
CBlade/Belt Guard Guards in Place
DGas Tank/Side Lethal Exhaust
EHandle Service/Warranty
FGas Tank /Side Refueling
GHandle Warning - Prop 65
HGas Tank/Side Hot Surface
I Handle QR Code for Manual
JBelt Guard Accidental Start
B
E
G
I
C
C
J
H
A
D
F
The SRX-150 Early Entry Concrete Saw is equipped with a number of safety decals. These decals
are provided for operator safety and maintenance information. Should any of these operation or
safety decals become unreadable, replacements can be obtained by calling [phone].
EARLY ENTRY CONCRETE SAW SAFETY

11
Blade
The SRX-150 uses an 6-3/8 inch diameter diamond blade.
Concrete Saw Usage
The SRX-150 is designed to cut control joints in green concrete within one to two hours of
concrete nishing.
PRODUCT SPECIFICATIONS
SRX-150 Dimensions
EARLY ENTRY CONCRETE SAW PRODUCT SPECIFCATIONS
19.30
37.60
45.92
The SRX-150 is a versatile gas powered Early Entry Concrete Saw. Operated and used according to
this manual, the SRX-150 will provide years of dependable service.
General Description
The SRX-150 is engineered as a portable concrete saw powered by a Honda gas engine. The saw is
capable of 1-1/8" depth of cut with an 6-3/8" blade.
Model SRX-150H SRX-150K
Engine Honda GX160 Cyclone Kohler CH255 Quad Clean
Horse Power 4.8Hp 5.5Hp
Starter Pull Pull
Blade Capacity 6-3/8" (162mm) 6-3/8" (162mm)
Depth of Cut 1-1/8" (29mm) 1-1/8" (29mm)
Arbor Triangular Triangular
LxWxH (in) 32" x 19" x 42" 32" x 19" x 42"
LxWxH (mm) 813 x 483 x 1067 813 x 483 x 1067
Weight 88 lbs. (39.9 kg) 88 lbs. (39.9 kg)
Part# 172023-H 172023-K
Motor and Weight Specications
Motor and Weight specications for the SRX-150 are listed below.

12
UNPACKING
Early Entry
Concrete Saw
Skid Plate Engine Manual Warranty Card
Early Entry Concrete
Saw Owner’s Manual
EARLY ENTRY CONCRETE SAW UNPACKING
01.2016
CC100
OWNER’S MANUAL,
OPERATING INSTRUCTIONS
& PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This owner’s manual
MUST accompany the equipment at all times.
Revision 100
Manual Part# 172021
Crack Chaser Saw
Your saw has been shipped from the factory thoroughly inspected. Only minimal assembly and
service is required. Check each item, making certain all items are accounted for and in good visual
condition before discarding any packing materials. If there are any missing or damaged parts call
MK Diamond Customer Service at 800-421-5830.
CONTENTS
In the containers, you will nd one (1) Early Entry Concrete Saw, one (1) Skid Plate, one (1) Early
Entry Concrete Saw Owner’s Manual, one (1) Engine Owners Manual and one (1) Warranty Card.
WARNING Never start engine until all initial servicing and set up steps are completed accord-
ing to this operations manual and engine manual. Read and familiarize yourself
with all controls and features of the saw before beginning operations.

13
TRANSPORT
EARLY ENTRY CONCRETE SAW TRANSPORT
CAUTION 1. The Early Entry Concrete Saw weighs approximately eighty-eight (88
pounds), use care when transporting.
2. Two people are required to lift and transport the Early Entry Concrete Saw.
1. Raise lock release lever.
2. ON/OFF switch.
3. Throttle control.
1
3
2

14
EARLY ENTRY CONCRETE SAW ASSEMBLY
Filling Oil Reservoir
Handlebar Assembly
(A)
Verify the Oil Drain Cap is
installed onto the Oil Drain Line
and is tight. Refer to Engine
Manual for details.
(A)
Locate the holes on both sides
of the handlebar.
(B)
Align the handlebar with the
holes on both sides of the
frame and put in the pin.
(C)
Install the pin until it is secure.
The engine is shipped with no oil in the crankcase. Refer to the engine manual for details
on the type and amount of oil required.
To ll the crankcase with oil, place the engine level. In order for this to be accomplished
the blade must not be installed, and the depth adjustment must be down (until the engine
is level).
NOTE:

15
EARLY ENTRY CONCRETE SAW ASSEMBLY
1. When installing the blade retaining-bolt, ensure the threads of the bolt are
aligned with the threads of the drive shaft so as not to "cross-thread" the bolt.
2. When installing the blade ensure that the blade shaft and anges are free from dirt
and all foreign material before mounting blade on the blade shaft. Tightening a blade
against an uneven surface can cause fracture or cause the blade to run out of alignment.
3. Flange bolt is right-hand threaded.
4. Installation or Removal of a blade requires the use of two wrenches (not included). A
9/16” box end or ratchet wrench for the blade shaft bolt and a 5/8” opened wrench to hold
the ats at the opposite end of the blade shaft.
(A)
Loosen the Blade Guard Nut.
Remove the Blade Guard
Cover.
NOTE:
Diamond Blade Installation
(E)
Replace the Blade Guard and
tighten Blade Guard Nut.
(B)
Loosen the Blade Shaft Nut
while holding the Shaft Wrench
steady. Remove the Blade Nut
and Outer Flange.
(C)
Install the Diamond Blade onto
the Blade Shaft. Directional
arrow on the blade indicates
proper rotational direction.
(D)
Install the Outer Flange and Blade
Shaft Nut. Tighten Blade Shaft Nut
holding the Blade Shaft steady.
NOTE: The blade turns counterclockwise when facing the blade shaft. Ensure
directional arrow on the blade indicates proper rotational direction. Match
arrow on Blade Guard with directional arrow on blade. Incorrect rotation
will reduce blade life.
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.
CAUTION

16
Filling Fuel Tank
Skid Plate Installation
WARNING 1. Gasoline is highly ammable and explosive. You can be burned or seriously
injured when handling fuel.
2. To fuel, stop engine if running, and allow it to cool.
3. Refuel in a well-ventilated area.
4. Keep gasoline away from appliance pilot lights, barbeques, electric appliances,
power tools, etc.
5. Wipe up spills immediately. Do not start engine until spill is dry.
1. Fuel can damage paint and plastic. Be careful not to spill fuel when lling the
fuel tank. Damage caused by spilled fuel IS NOT covered under the warranty.
2. DO NOT use stale or contaminated gasoline, or an oil/gasoline mixture.
NOTE:
(A)
Remove the Fuel Cap. Refer to
Engine Manual for details.
(B)
Ensure fuel level is 1" below the
throat of the Fuel Tank.
1 inch (25mm)
from throat
(A)
Hook front of Skid Plate over pin
on front plunger.
(B)
Insert pin through Skid Plate
and rear plunger.
Maximum
Fuel Level
(C)
Ensure fuel level is below the
top of the strainer lter.
Maximum
Fuel Level
EARLY ENTRY CONCRETE SAW ASSEMBLY
(C)
Replace the Blade Guard and
tighten Blade Guard Nut.

17
EARLY ENTRY CONCRETE SAW START UP
The pre-start inspection should be performed before beginning any job. If Diamond Blade is worn,
replace the blade before starting work.
Pre-Start Inspection
(A)
Inspect Blade for damage or
cracks. Verify the Blade is a dry
cutting blade and correct for the
material being cut.
(C)
Inspect the saw for general
damage and/or loose hardware.
(B)
Inspect Engine for leaks.
(D)
Check for proper oil level.
Refer to Engine Manual for
details.
Low Level
Proper Oil Level
(G)
Check the Air Filter for
cleanliness. Refer to Engine
Manual for details.
(E)
Ensure fuel level is 1" below the
throat of the Fuel Tank.
1 inch (25mm)
from throat
Maximum
Fuel Level
(F)
Ensure fuel level is below the
top of the strainer lter.
Maximum
Fuel Level

18
EARLY ENTRY CONCRETE SAW OPERATION
Adjusting Depth of Cut
Dust Collection Systems
The common depth of cut for control joint cutting is 1". The SRX-150 is factory set to a depth of 1".
The SRX-150 has a 2" port for connection to a dust collection system. The vacuum system required
must have a CFM of 129 and a HEPA lter guaranteed 99.99% efcient at .3 micron.
(A)
Raise the Raise/Release Lever.
(B)
Adjust the Truck Stop screw to
increase or decrease the depth
of cut.
As the blade wears adjustments may be required.
NOTICE
1. Carbon monoxide gas is toxic, breathing it can cause unconsciousness
and/or death.
2. Avoid any areas or actions that expose you to carbon monoxide.
Engine Start
WARNING
Standard Operation
The Early Entry Concrete Saw is intended for industrial applications and operated by experienced
professionals. The operator must be aware of the machine’s capabilities and limitations. It is the
operators responsibility to use this machine under safe working conditions and conform with federal,
state and local codes or regulations pertaining to safety, air, pollution, noise etc...

19
EARLY ENTRY CONCRETE SAW OPERATION
(A)
Use the Raise Lock/Release
Lever to raise the blade clear of
the oor.
(B)
Attach the dust collection
system to the vacuum port.
(C)
Start the Saw using the Engine Start
procedure in the engine manual.
Prior to operation of this machine the operator must determine the existence
and location of any subsurface features that may be hazardous or could
damage the equipment, (i.e. electric cable, natural gas line etc...)
CAUTION
1. Ensure the blade you are using is clearly marked for dry cutting.
2. Check the condition of the air lter at least every four hours of operation.
Refer to Engine Manual for details.
NOTE:
(E)
Cut with engine at full throttle.
(F)
When the cut is complete, raise
the blade completely out of the
cut by pushing down on the
handlebars until the Raise Lock
engages.
(D)
Align the pointer and blade with
the cut line and slowly lower the
blade by squeezing the Raise
Lock Release Lever.
Dry cutting has the potential to expose you to high levels of crystalline silica.
Repeated and/or substantial inhalation can cause serious or fatal respiratory
diseases including silicosis. For more information go to www.P65Warnings.
ca.gov. Employ dust controls and protection per OSHA/NIOSH/MSHA.
WARNING

20
As concrete drys or cures or begins to set. The process cracks internal stresses which may cause
random cracks. Contraction joints are cut in concrete in order to relieve stresses in the concrete.
The SRX-150 controls random cracking through the early timing of a saw cut at predetermined loca-
tions to create weakened planes in the concrete that subsequently crack at the bottom of the cut to
relieve stress. Contraction joints should be a minimum of 1/8th the concrete depth and a minimum
of 1" (25mm) deep. Contraction joint cutting should be done as soon as the concrete will support the
weight of the saw and the operator without marking or damaging the concrete.
EARLY ENTRY CONCRETE SAW OPERATION
Sawing Working Techniques
• Concrete thickness
• Type, amount and location of reinforcement
• Shrinkage potential of concrete-cement (type, quantity), aggregate (size, quantity, quality),
water to cement ratio, admixtures, concrete temperature.
• Base friction
• Slab restraints
• Layout of foundations, racks, pits, equipment pad, trenches, etc.
• Environmental factors – temperature, wind, humidity
• Methods and quality of concrete curing
Generally, contraction joint patterns should divide slabs into approximate square panels per the
recommended spacing shown.
Several factors affect joint spacing including:
The timing of concrete operations – especially nishing and jointing – is critical. Failure to address
this issue can contribute to undesirable characteristics in the wearing surface as cracking.." (Extract
from the foreword of the American Concrete Institute (ACI) 302.1 R-96.)
Concrete thickness, in (mm) Maximum spacing, ft. (m)
3.5 in (90mm) 8ft. (2,4m)
4, 4.5in (100, 114mm) 10ft. (3,0m)
5, 5.5in (125, 140) 12ft. (3,6m)
6in or greater (150mm) 15ft. (4,5m)
Recommended contraction joint spacing
The ACI Spec 302.1R-96.
‘Early-entry dry-cut saws use diamond blades and a skid plate helps prevent spalling. Timely chang-
ing of skid plates is necessary to effectively control spalling. It is best to change skid plates in accor-
dance with manufacturer’s recommendations. The goal of saw-cutting is to create a weakened plane
as soon as the joint can be cut. The timing of the early-entry process allows joints to be in place prior
to development of signicant tensile stress in the concrete.
Sawing Working Techniques