Stark 61052 Original instruction manual

RULES FOR SAFE OPERATION
GeneraI Safety……………………………1-2
Diamond Blade Safety………………………2
Cutter Transportation Safety…………………2
Emergencies……………………………………3
Maintenance Safety……………………………3
ⅡOPERATION
Introduction……………………………………3
Determining the Right Machine……………3
Operating Principle…………………………3
Delivery Checks…………………………………4
Tlype of Cutting…………………………………4
Before Starting…………………………………4
To Start Cutting…………………………………4
Cutting……………………………………………5
Belts & Pulleys…………………………………5
Dry Cutting………………………………………5
ⅢMAlNTENANCE
Troubleshooting……………………………6-7
LUBRlCATION AND SERVICE……………8
SPECIFICATlON………………………………8
WARRANTY…………………………………8
REPLACEMENT PARTS LlST…………10-11
RULES FOR SAFE OPERATION
WARNlNG：
Read all safety warnings and instructions. Failure to
follow the warnings and instructions may result in
injury and/or property damage. Save all warnings
and instructions for future reference. The following
safety guidelines should always be used when
operating these Concrete Cutters：
GENERAL SAFETY
■DO NOT operate or service this equipment before
reading the entire manual．
■This equipment should not be operated by pers-
ons under 18 years of age．
■NEVER operate this equipment without proper
protective clothing，shatterproof glasses, steel-
toed boots and other protective devices required
by the job．
■NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine．
■NEVER operate this equipment under the
influence or drugs or alcohol．
■NEVER use accessories or attachments, which
are not recommended by our Company for this
equipment．Damage to the equipment and/or
injury to user may result．
■The manufacturer does not assume responsi-
bility for any accident due to equipment modifica-
tions．
■Whenever necessary, replace nameplate,
operation and safety decals when they become
difficult to read．
■ALWAYS check the machine for loosened
threads or bolts before starting．
■NEVER touch the hot exhaust manifold, muffler
or cylinder．Allow these parts to cool before
servicing engine or saw．
■High Temperatures -Allow the engine to cool
before adding fuel or performing service and
maintenance functions. Contact with hot compo-
nents can cause serous bums．
■The engine section of this cutter requires an
adequate free flow of cooling air ．NEVER
operate the cutter in any enclosed or narrow
area where free flow of the air is restricted. If
the air flow is restricted it will cause serious
damage to the saw or engine and may cause
injury to people. Remember the cutter's engine
gives off DEADLY carbon monoxide gas．
■ALWAYS refuel in a well-ventilated area, away
from sparks and open flames．
■ALWAYS use extreme caution when working
with flammable liquids．When refueling, stop the
engine and allow it to cool．DO NOT smoke
around or near the machine．Fire or explosion
could result from fuel vapors, or if fuel is spilled
on a hot engine．
■NEVER operate the cutter in an explosive
atmosphere or near combustible materials．An
explosion or fire could result causing severe
bodily harm or even death．
■Topping-off to the fuel filler port is dangerous,
as it tends to spill fuel．
1

■NEVER use fuel as a cleaning agent．
■ALWAYS read, understand, and follow proce-
dures in operator's Manual before attempting to
operate equipment．
■ALWAYS be sure to operator is familiar with
proper safety precautions and operating
techniques before using the cutter．
■Stop the engine when leaving the cutter
unattended.
■Block the unit when leaving or when using on a
slope．
■Maintain this equipment in a safe operating
condition at all times．
■ALWAYS stop the engine before serving, add-
ing fuel and oil．
■NEVER Run engine without air filter．Severe
engine damage may occur．
■NEVER Run engine without air filter．Severe
engine damage may occur．
■ALWAYS service air cleaner frequently to pre-
vent carburetor malfunction．
■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．
■NEVER operate this cutter in areas that cont- ain
combustible material or fumes ．Fire and/or
explosions may result from errant sparks from
the equipment．
WARNING：
■DO NOT operate this equipment unless all
guards and safety devices are attached and in
place．
■Caution must be exercised while servicing this
equipment ．Rotating and moving pans can
cause injury if contacted．
■Keep all inexperienced and unauthorized people
away from the equipment at all times．
■Unauthorized equipment modifications wilI vo- id
all warranties．
DlAMOND BLADE SAFETY
■Use appropriate steel centered diamond blades
anufactured for use on concrete cutters．
■ALWAYS inspect diamond blades before each
use. The blade should exhibit no cracks, dings,
or flaws in the steel centered core and/or rim.
Center (arbor) hole must be undamaged and
true．
■Examine blade flanges for damage, excessive
wear and cleanliness before mounting blade．
Blade should fit snugly on the shaft and against
the inside/outside blade flanges．
■Ensure that the blade is marked with an oper-
ting speed greater than the blade shaft speed of
the cutter．
■Only cut the materiaI that is specified by the
diamond blade, Read the specifications of the
diamond blade to ensure the proper tool has
been matched to the materiaI being cut．
■ALWAYS keep blade guards in place. Expos-
ure of the diamond blade must not exceed 180
degrees．
■Ensure that the diamond blade does not come
into contact with ground or surface during
transportation．DO NOT drop the diamond blade
on ground or surface．
■The engine governor is designed to permit
maximum engine speed in a no-load condition.
Speeds that exceed this limit may cause the
diamond blade to exceed the maximum safe
allowable speed．
■Ensure that the blade is mounted for proper
operating direction．
CUTTER TRANSPORTATION SAFETY
■Use the lifting bail and appropriate lifting quipm-
ent to ensure the safe movement of the cutter．
■DO NOT use the handle bars and/or front
pointer as lifting points．
■NEVER tow the saw behind a vehicle．
■Ensure that both pointer bars are positioned
appropriately to minimize their exposure during
transportation．
■Safeguard against extreme cutter attitudes rela-
tive to level. Engines tipped to extreme angles
may cause oil to gravitate into the cylinder head
making the engine difficult to start．
■NEVER transport the cutter with the blade
mounted．
2

EMERGENCIES
■ALWAYS know the location of the nearest fire
extinguisher and first aid kit. Know the
location of the nearest telephone. Also know
the phone numbers of the nearest ambulance,
doctor and fire department. This information
will be invaluable in the case of an
emergency.
MAINTENANCE SAFETY
■NEVER lubdcate components or attempt
service on a running machine．
■ALWAYS allow the machine a proper amount
of time to cool before servicing．
■Keep the machinery in running condition．
■Fix damage to the machine immediately and
always replace broken parts．
●Dispose of hazardous waste properly.
Examples of potentially hazardous waste are
used motor oil, fueI and fuel filters．
●DO NOT Use food or plastic containers to
dispose of hazardous waste．
II OPERATION
Introduction/Determining the Right Machine
The machines used for the primary purpose
of “flat” sawing．This type of sawing is described
as “flat”because the pavement is cut
somewhere close to a horizontal plane．It is the
most common type of diamond blade cutting．
Concrete cutters in the industry are available in a
variety of types, sizes and styles，they range
from manual or self propelled in horsepower
from 7-72hp. It is possible to cut both concrete
(green or cured, with or without rebar) or asphalt
with a concrete cutter. Our MF20 utilized for jobs
requiring precision cutting including floors,
pavements, walkways, ramps and other flat
sawing applications．
You will find a cutter to fit a wide variety of job
applications．
Upon receipt of your machine, CAREFULLY
CHECK FOR ANY FREIGHT DAMAGE. Any
damage should be immediately reported to the
carrier and a claim registered．
Operating Principle/Delivery Checks/
Installing Blade/Types of Cutting
OPERATING PRINCIPLE
The following instructions were compiled to
provide you information on how to obtain long
and trouble free use of the unit ．Periodic
maintenance of this unit is essential．Read the
manual in its entirety and follow the instructions
carefully．Failure to do so may injure yourself or
a bystander．
DELIVERY CHECKS
Immediately upon taking delivery of your new
equipment and before putting it into service：
■Read the handbook completely-it could
save a great deal of unnecessary expense．
■Read the engine manual supplied．
■Check the general condition of the equipment
-has it been damaged during delivery?
■Check engine oil level．
■Check fuel levels．
Recommend lubricants are detailed in the CARE
AND MAlNTENANCE section．
3

INSTALLING BLADE
1．Be certain that the spark plug is disconnected or
saw is unplugged．
2．Remove the blade shaft nut，and take off outside
blade shaft flange．
3．Clean off any foreign particles on the clamping
surfaces of flanges and on the mounting surface
of the blade．
4．Place the blade on the blade shaft,lining up the
offset drive pin in the blade with the drive pin in
the mounting collar (if the pin system is available
on the machine). If your blade has a directional
rotational arrow, position arrow for down cut
(diamond tail trailing for down cut)．
5．Replace the outside blade shaft flange on the
blade shaft. Drive pin on the inside collar must
project through the drive hole in the blade and
into the outside collar (if the pin system is
available on the machine)．
6．Tighten the blade shaft nut securely against star
washer and outside flange, using wrench
supplied．
7．Reconnect the spark plug or (with switch “off”)
plug in the electric supply cord．
TYPES OF CUTTING
Cut speed depends entirely on using the correct
blade for the material to be cut．Wet or dry, diamond
blades of various specifications are available for
cutting concrete or asphalt．
Before Starting/Cold Start/Hot Start/
To Start Cutting
BEFORE STARTING
1．Use correct blade for cutting conditions.
2．Ensure arbors and flanges are clean and undamaged.
3．Mount blade and tighten securely using wrench.
4．When wet cutting, check water jets for adequate flow.
5．Align pointer with cutter blade.
Caution-Set unit up in en open area．Avold close
proximity to structures or other equipment.
Failure to do so may cause Inadvertent injury to
operator or other persons in the area．
Cold start -Open the fuel valve underthe gas tank
all the way．Position the engine stop switch，located
on the engine, to run. Open the throttle approximat-
ely half way and apply the choke．Pull the starter
rope sharply．When the engine starts, open the
choke and adjust the throttle as necessary to keep it
running．Allow the engine to warm up for a few
minutes before placing it under the load．If the
engine doesn't start after (3) pulls，open choke
slightly to prevent flooding．Always operate the
engine at full throttle when under load．
Hot Start -Open the valve under the gas tank all the
way if it has been shut off．Open the throttle
approximately half way．Do not apply the choke．
Pull the starter rope sharply until the engine
starts．When the engine starts，adjust the throttle．
Always operate the engine at full throttle when
under load．
NOTE ：These starting instructions are general
guidelines only．Since many engine options are
available,consult the Engine Manual included with
this unit for specific instructions．
Cautlon-Gasoline Engines-To improve the
engine service life, allow the engine to idle
without load for (2) to (5) minutes before
shutting it down．When the idling period is
up，use the stop switch located on the engine
and turn it to stop．Close the ruel valve under
the gas tank．Engine flooding can occur if the
valve is left open during transport．
TO START CUTTING
1．Start engine and let engine warm up．AII
cutting is done at full throttle．
2．Align blade and cutter with cut．If wet cutting，
open water valve and turn water safety switch
on．
3．Step on the left side of PEDAL untiI hear a
“click”, then turn on the WHEEL HANDLE on
the top of the machine to remove the
equipment forward and reverse，step down the
right side of PEDAL to change to “push”
driving system．
4．Lower blade into cut slowly．
5．Cut as fast as blade will allow．If blade climbs
out of cut．reduce forward speed or depth of
cut．
6．Use only enough side pressure on cutter
handles to follow cutting line．
4

Cutting/Belts & Pulleys
CUTTlNG
Lower the blade into concrete to required depth by
turning the tilt crank counterclockwise．Ease the
saw slowly forward．Slow forward pressure if the
saw begins to stall．
Note：For deeper cuts (4 inches/102mm or more)，
several cuts should be made in incremental steps of
1-1/2 inch (38mm) to 2 inches (51 mm) until the
desired depth is reached．
Push the saw steadily forward using the front
pointer as a guide. Exert enough forward pressure
so that the engine/motor begins to labor,but does
not slow down．If the saw begins to stall, retard
forward movement until full RPM is restored to the
blade．If saw stalls, raise the blade out of the cut
before restarting．Avoid excessive side pressure or
twisting of the blade in the cut．
BELTS & PULLEYS
NEVER MAKE ADJUSTMENTS TO V7BELTS
AND PULLEYS WHILE ENGINE IS RUNNlNG.
1．The best tension for a v-belt drive is the lowest
tension at which the belts will not slip under full
load．
2．Take up tension until the belts are snug in the
grooves．Run the drive for about five (5) minutes
to "sear" the belts．The impose the peak load．If
the belts slip，tighten them until they no longer
slip at peak load．Most new belts will need
additional tensioning after seating．
3．Remember, too much tension shortens belt and
bearing life．
4．Check the belt tension frequently during the first
day of operation. Check the belt tension
periodically thereafter and make any necessary
adjustments．
5．The two most cornmon causes of sheave
misalignment are：
a) The engine drive shaft and the blade shaft are
not parallel．
b) The pulleys are not located properly on the shafts．
6．To check alignment，use a steel straight Edge.
See Figure 1．
Flgure 1
7．Line up the straight edge along the outside
face of both pulleys shown in the drawing．All
pulleys have (2) set screws in the bottom of their
grooves．Set screws require thread locking Lock
title．
8．Misalignment will show up as a gap between the
pulley face and straight edge．Make sure there is
clearance between arbor pulley and saw base
on both sides．
DRY CUTTlNG
●Never operate any saw without safety guards
in place．
●Do not exceed maximum operating speed
established for blade diameter．
●Do not force blade into material：allow blade
to cut at its own speed．
●Do not make long continuous cuts．Never dry
cut for more than 30 seconds at a time．Allow
blade to cool.
●Do not cut or grind with side of blade or cut a
curve or radius．Do not cut dry with blades
recommended for wet cutting．
●Do not operate saw with blade diameter
larger than machine's capacity．
5

PROBLEM
UNEVEN SEGMENT WEAR
SEGMENT CRACKS
SEGMENT LOSS
CRACKS IN CORE
LOSS OF TENSION
CAUSE
●(In wet cutting)Insufficient water
(usually on one side of blade)．
●Equipment defects also can
cause the segments to wear
unevenly．
●Saw head is misaligned．
●Blade is too hard for material
being cut．
●Blade overheats because of
lack of coolant(water or air).
●Core is worn from undercutting．
●Defective collars/flanges set
blade out of alignment．
●Blade is too hard for material
being cut．
●Blade is cutting out of round,
causing a pounding motion．
●Improper blade tension．
●Blade flutters in cut as a result
of losing blade tension．
●Blade specification is too hard
for the material being cut．
●Core overheating．
●Core overheating as a result of
blade spinning on arbor．
●Core overheating from rubbing
the matedaI being cut．
●Unequal pressure at blade cla-
mping collars/flanges．
●Blade is too hard for the material
being cut．
REMEDY
●Flush water system．
●Check flow to both sides of blade.
●Replace bad beanngs,worn arbor
shaft or misalignment to spindle.
●Check alignment for squareness.
both vertically and horizontally, of
the saw blade．
●Use a blade with a softer
bond/matrix.
●(Wet Cutting)Check water lines.
●Make sure flow is adequate on
both sides of blade and there
are no blockages
●Use sufficient water to flush
out the cut．
●(Dry Cutting) Run blade free of
cut penodically to air cool．
●Clean collars/flanges or replace
if they are under recommended
diameter．
●Use proper blade specification
for material being cut．
●Replace worn bearings; realign
blade shaft or replace worn
blade mounting arbor．
●When ordering blades match
shaft speed of saw．
●Check spindle speed to ensure
blade is running at correct RPM.
●Avoid twisting or turning blade
inthe cut．
●Tighten the blade shaft nut．
●Make sure blade iS running at
proper speed and that drive pin
is functioning properly．
●Use a softerbond/matrix to
eliminate stress．
●Make certain blade RPM
is correct．
●Check Water flow．Distribution
and lines．
●Tighten the blade shaft nut．
Make certain the drive pin
is functioning．
●Properly align the saw to
square cut．
●Collars/flanges must be
identical in diameter and
the recommended size．
●Use a softer bond/matrix to
reduce stress．
6

PROBLEM
BLADE WOBBLES
BLADE WILL NOT CUT
UNDERCUTTING THE CORE
ARBOR HOLE OUT-OF- ROUND
BLADE WORN OUT OF ROUND
CAUSE
●Blade is on a damaged or
worn saw．
●Worn collar．
●Blade runs at an incorrect peed.
●Collar/flange diameters are not
identical．
●Blade is bent as a result of
dropping or twisting．
●Blade is too hard for material
being cut．
●Blade has become dull．
●Blade does not cut material it
was specified for．
●Abrasive weanng of the core
faster than the segments．
●Collars/flanges are not properly
tightened，permitting blade to
rotate or vibrate on the shaft．
●Collars/flanges are worn or dirty.
Blade is not propedy mounted．
●Shaft bearings are worn．
●Surges occur because engine
is not properly tuned．
●Blade arbor hole is damaged
from incorrectly mounting
the blade．
●Bond/matrix is too hard for
●material．
Blade si slipping, weadng one
half of blade more than other.
REMEDY
●Check for bad beadngs, bent
shaft, or worn mounting arbor．
●Check collars/flanges to make
sure they are clean，fiat and of
correct diameter．
●Set engine at proper RPM．
●Use proper size blade
collars/flanges．
●DO NOT use bent blade．
Contact blade manufacturer．
●Select proper blade for matedal
being cut．
●Sharpen by cutting on softer
abrasive material to expose
diamonds. If continually
sharpening, the blade is toohard
for the matenal being cut．
●Break-in on the matenal to be cut.
If it does not dress itself．sharpen
as you would a dull blade．
●Use Water to flush out fines
generated during cutting
●Use wear-restardant cores．
●Make certain the blade is mounted
on the proper shaft
diameter．Tighten the shaft nut with
a wrench to makecertain that the
blade is secure．
●Clean collars/flanges，make sure
they are not worn．
Tighten arbor nut．
●Make sure the pin hole slides over
drive pin．
●install new blade shaft bearings or
blade shaft，as required．
●Tune engine according to
manufacturer's manual．
●If core is worn or arbor hole damaged.
DO NOT USE．Contact blade
manufacturer．
●Replace worn shaft or mounting
arbor bushing．
●Make certain that drive pin is
functioning．
●Tighten spindle nut．
7

LUBRICATION AND SERVICE
●Check oil levels, wiring, hoses (air, fuel, water) and
lubricate machine daily．
●Repair or replace all worn or damaged
components immediately．
●Check drive belt tension, do not over-tension．
●Make sure machine has full set of matched belts．
●Check bladeshaft，make sure arbor and threads
are not worn，damaged，or bent．
●Bladeshaft bearings should be tight, no free play
side-to-side or up and down．
●Grease blade shaft bearings daily．
●Blade collars should be clean,free of nicks and
burrs．No diameter wear and not out of round．
●Drive pin not excessively worn or bent and free of
gouges．
●All guards in place and secure．
●All fasteners tight and secure．
●Air filter/oil filter (hydraulic or engine) clean．
●Flush clean water through the pump and spray the
assembly every night．This prolongs the pump and
blade life．
Lubricants：
Engine oil SAE 10W/30
General Grease #1 Lithium
●Clean machine before starting lubrication
maintenance．
●Insure machine is on solid．level ground before
starting maintenance．
●During lubrication maintenance insure strict
cleanliness is observed at all times．
●To avoid the risk of accidents. use the correct tool
for the job and keep tools clean．
●The draining of engine oil is best carried out when
the oil is warm NOT hot．
●Any spilled oil must be cleaned up immediately．
●Use only clean containers for oil and only CLEAN,
FRESH oils and grease of correct grade．
●Contaminated Water/Fluids／Oils／Filters Must Be
Disposed of Safely．
·The product concerned has been operated and
maintained in accordance with the operating
instructions．
·Has not been damaged by accident, misuse or
abuse
·Has not been tampered with or repaired by any
unauthorized person．
The owner is responsible for the cost of transportation
to and from the authorized repairer and the unit is at
the owners risk while in transit to and from the
repairer．
8

9

Major components list
ITEM NO.
CODE
DESCRIPTION
ITEM NO.
CODE
DESCRIPTION
1
Q300-001
engine
33
Q300-033
washer Φ8
2
Q300-002
bolt M8*45
34
Q300-034
position plate
3
Q300-003
spring washer Φ8
35
Q300-035
wheel frame
4
Q300-004
washer Φ8
36
Q300-036
belt
5
Q300-005
bolt M8
37
Q300-037
belt guard
6
Q300-006
pulley of engine
38
Q300-038
washer Φ8
7
Q300-007
washer
39
Q300-039
spring washer
M8
8
Q300-008
spring washer Φ8
40
Q300-040
bolt M8*30
9
Q300-009
bolt M8*25
41
Q300-041
blade guard
10
Q300-010
lifting hook
42
Q300-042
bolt Φ10
11
Q300-011
bolt M8*20
43
Q300-043
pointer wheel
12
Q300-012
spring washer Φ8
44
Q300-044
bolt M10*100
13
Q300-013
washer Φ8
45
Q300-045
pointer
14
Q300-014
bolt Φ8
46
Q300-046
bolt M10
15
Q300-015
handle
47
Q300-047
bolt M8*20
16
Q300-016
rear wheel
48
Q300-048
spring washer
17
Q300-017
bearing 6004
49
Q300-049
washer
18
Q300-018
washer Φ8
50
Q300-050
front wheel
19
Q300-019
spring washer Φ8
51
Q300-051
nut
20
Q300-020
bolt M8*20
52
Q300-052
blade
flange(outer)
21
Q300-021
base assy
53
Q300-053
blade
flange(inner)
22
Q300-022
bolt Φ8
54
Q300-054
bearing UCP206
23
Q300-023
bolt M8*40
55
Q300-055
principal axis
24
Q300-024
bolt M8*30
56
Q300-056
washer Φ10
25
Q300-025
washer Φ8
57
Q300-057
spring washer
M10
26
Q300-026
wheel handle
58
Q300-058
bolt M10*35
27
Q300-027
bolt M10*30
59
Q300-059
pulley
28
Q300-028
spring washer Φ10
60
Q300-060
washer
29
Q300-029
washer Φ10
61
Q300-061
spring washer Φ8
30
Q300-030
bearing FL204
62
Q300-062
bolt M8*25
31
Q300-031
screw stem
63
Q300-063
water tank
assembly
32
Q300-032
bolt M8*35
10

11