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Working safely with cut-off machines

English

5

Position front thrust washer – tighten 
tensioning nut – turn cutting wheel by 
hand, in the process making a visual 
inspection for radial and axial runout.

Storing cutting wheels

Store cutting wheels in a dry, frost-free 
place, on a flat surface, at constant 
temperatures – 

danger of breakage 

and shattering!

Always protect cutting wheels against 
sudden impact with the floor or objects.

Before starting

Check that the cut-off machine is in good 
condition - refer to the corresponding 
chapters in the Instruction Manual:

The cutting wheel must be suitable 
for the material to be cut. It must be 
in good condition and fitted correctly 
(direction of rotation, securely 
seated).

Check that the deflector is secure - 
consult a STIHL servicing dealer if it 
is loose

The throttle trigger and throttle 
trigger interlock must move easily – 
throttle trigger must return 
automatically to the idle position 
when released

Slide control / master control / stop 
switch must move easily to 

STOP

or

0

Check that the spark plug boot is 
secure. A loose boot can lead to 
flying sparks which may ignite the 
escaping fuel/air mixture – 

risk of 

fire!

Never attempt to modify the controls 
or safety devices

Keep the handles dry and clean – 
free from oil and dirt – for safe 
control of the cut-off machine

The machine should only be used if it is 
in good working order – 

risk of 

accident!

Starting the engine

Move at least 3 meters away from the 
place at which the machine was refueled 
and never start the machine in enclosed 
spaces.

The machine may only be used on level 
ground. Ensure a firm and secure 
footing and hold the machine firmly. The 
cutting wheel must not touch any objects 
or the ground and must not be in the cut.

The cutting wheel may begin to rotate as 
soon as the machine is started.

The machine is operated by only one 
person.  There should not be any other 
person within the working area, not even 
when starting the machine.

Do not drop-start the engine – start as 
described in the Instruction Manual.

The cutting wheel continues to run for 
some time after the throttle trigger has 
been released – 

Risk of injury due to 

coasting effect!

Holding and guiding the machine

The cut-off machine may only be used 
for freehand cutting or when mounted on 
a STIHL cut-off machine cart.

Hand-held cutting

Always hold the machine 

firmly with 

both hands

: Right hand on the rear 

handle – even if you are left-handed. To 
ensure reliable control, wrap your 
thumbs tightly around the handlebar and 
handle.

When a cut-off machine with rotating 
cutting wheel is moved in the direction of 
the arrow, a force is produced which 
causes the machine to tip sideways.

The object that is to be cut must be 
positioned firmly; always guide the 
machine to the workpiece – never vice 
versa.

Cut-off machine cart

STIHL cut-off machines can be mounted 
on a STIHL cut-off machine cart.

337BA047 KN

180BA022 KN

Summary of Contents for TS 420

Page 1: ... Working safely with cut off machines ...

Page 2: ......

Page 3: ... shows the TS 420 cut off machine as an example Other cut off machines may have different controls This brochure contains references to chapters in the Instruction Manuals for the specific machines Thus the Instruction Manual for the respective cut off machine and the information sheets enclosed with the cut off wheel must be observed If you still have questions after reading this brochure please ...

Page 4: ...recommends that you consult your doctor and the manufacturer of your pacemaker in order to avoid health hazards Anyone who has consumed alcohol medicines affecting their ability to react or drugs must not operate the machine Postpone the work if the weather is bad snow ice wind higher risk of accidents The machine may only be used for cutting It is not suitable for cutting wood or wooden objects A...

Page 5: ...utting wheel fitted it may break In vehicles Properly secure your machine to prevent turnover damage and fuel spillage Refueling Switch off the engine before refueling Never refuel the machine while the engine is still hot the fuel may spill over risk of fire Open the fuel filler cap carefully so that any excess pressure is relieved gradually and fuel does not splash out The machine may only be re...

Page 6: ... display any signs of core fatigue or overheating discoloration check also that there are no damaged or missing segments and that the spindle bore is not damaged Never use a chipped cracked or warped cutting wheel Substandard and or unapproved diamond cutting wheels can shimmy during cutting This shimmying can cause such diamond cutting wheels to be abruptly braked or become stuck in the cut Dange...

Page 7: ...if it is in good working order risk of accident Starting the engine Move at least 3 meters away from the place at which the machine was refueled and never start the machine in enclosed spaces The machine may only be used on level ground Ensure a firm and secure footing and hold the machine firmly The cutting wheel must not touch any objects or the ground and must not be in the cut The cutting whee...

Page 8: ...ethodically only with good lighting and visibility Take care not to endanger other people Ensure proper ventilation when working in trenches hollows or other confined locations risk of serious or fatal injury from breathing toxic fumes If you feel sick if you have a headache vision problems e g your field of vision gets smaller hearing problems dizziness or inability to concentrate stop work immed...

Page 9: ...ntact with a solid object Reduce the risk of kickback Work cautiously and methodically Hold the cut off machine firmly with both hands and maintain a secure grip Do not use the upper quarter of the cutting wheel for cutting The cutting wheel must be introduced into the cut with extreme care without twisting and without pushing Always be aware that the object to be cut may move and other factors ma...

Page 10: ...s are suitable for dry cutting or wet cutting only Work with water and wet cutting when using composite resin cutting wheels that are suitable only for wet cutting e g use STIHL water attachment Use dry cutting when using composite resin cutting wheels that are suitable only for dry cutting If composite resin cutting wheels of this type become wet their cutting performance is reduced and they beco...

Page 11: ...to ignition outside the cylinder move the slide control stop switch to STOP or 0 before turning the engine over on the starter with the spark plug boot removed or the spark plug unscrewed Do not service or store the machine near a naked flame risk of fire due to the fuel Check fuel cap regularly for tightness Use only spark plugs that are in perfect condition and have been approved by STIHL see Sp...

Page 12: ...k 10 l for binding dust water tank usable on the cut off machine cart for binding dust Observe with diamond and composite resin cutting wheels Object to be cut Must be fully supported Must be secured so it cannot roll or slip off Must be prevented from vibrating Severed parts With openings recesses etc the sequence of the cuts is important Always make the last cut so that the cutting wheel does no...

Page 13: ... feed with full cutting depth along the guide groove for small corrections of direction do not tilt the cutting wheel but always position it anew instead if necessary leave small ridges that hold the part that is to be separated in position Break these ridges later Shaping pipe N Mark a cutting line N Grind a guide groove along the marked cutting line do this by starting at the apex and cut outwar...

Page 14: ...esses during transport and storage Avoid jolting and impacts Stack cutting wheels flat on a level surface in the original packaging in a dry place where the temperature is as constant as possible Do not store cutting wheels in the vicinity of aggressive fluids Store cutting wheels in a frost free place The proper selection and use of composite resin cutting wheels ensures economical use and avoids...

Page 15: ...f application of the cutting wheel the numbers denote the performance class of the STIHL diamond cutting wheel Axial and radial run out A faultless spindle bearing of the cut off machine is necessary for a long service life and efficient functioning of the diamond cutting wheel Using the cutting wheel on a cut off machine with a faulty spindle bearing can lead to deviations in radial and axial run...

Page 16: ... is dull built up edges with cut ting wheels for stone Sharpen cutting wheels for stone by briefly cutting through abrasive materials replace cutting wheel for asphalt with a new one poor cutting performance high segment wear Cutting wheel is turning in the wrong direction Mount cutting wheel so that it turns in the right direction Breakdowns or tears in the parent wheel and segment Overloading us...

Page 17: ...dling e g excessive feed effort if excessively large cross sections are cut without pendulum cutting movement back and forth in the cutting plane Built up edges increase vibration reduce cutting performance and cause formation of sparks At the first signs of built up edges immediately sharpen the diamond cutting wheel to do this briefly cut through abrasive material such as sandstone aerated concr...

Page 18: ...ts Check operation X X Fuel pick up body in fuel tank test check X Replace X X X Fuel tank Clean X Ribbed V belt Clean retension X X Replace X X Air filter all filter components Replace Only if there is a noticeable loss of engine power Cooling air intake slits Clean X Cylinder fins Have them cleaned by a specialist dealer 1 X Spark arresting screen2 in muffler test check X Clean or replace X Wate...

Page 19: ...formation sticker Replace X 1 STIHL recommends STIHL servicing dealers 2 present only in some countries The following maintenance intervals apply in normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions extensive dust etc before starting work at the end of work and or daily Whenever tank is refill...

Page 20: ...ler cap 8 Water attachment 9 Tensioning nut 10 Adjusting lever 11 Cutting wheel 12 Front thrust washer 13 Deflector 14 Muffler 15 Spark arresting screen present only in some countries 16 Handlebar 17 Decompression valve 18 Cap for spark plug boot 19 Choke lever 20 Fuel pump 21 Filter cover Serial number Main Parts 7 6 3 2 5 8 10 9 11 4 1 19 15 16 13 20 21 17 18 14 370BA046 KN ...

Page 21: ...Working safely with cut off machines English 19 ...

Page 22: ...Working safely with cut off machines English 20 ...

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Page 24: ...www stihl com 04571860121 0457 186 0121 0457 186 0121 englisch G ...

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