GEISMAR STUMEC MTZ 350S User manual

MTZ
LIGHTWEIGHT
RAIL CUTTING
MACHINE
Type
MTZ
ANGLAIS

In accordance with our environmental safety policy, this manual has been printed on recycled paper.
INT_Gb_00002_070525.doc
GEISMAR, the quality choice !
You have just acquired a machine for laying and servicing railway lines. We thank you for choosing equipment developed and constructed by
GEISMAR / STUMEC, the fruit of over eighty years’ experience.
Every day since 1924, the GEISMAR Group has been investing in research and state-of-the-art construction to offer you the quality and
reliability so essential to the requirements of the world of railways.
This machine, built entirely in France from design through to delivery, has been subjected to continuous, extremely strict controls. Formed of
different mechanical elements assembled by highly qualified fitters, your machine has been tested, calibrated and controlled at every stage of its
production.
We are convinced that it will give you every satisfaction and are, of course, at your service to offer you any recommendations you may require
for its use or its maintenance.
We thank you for the confidence you have shown in us and, in the hope that we will remain one of your privileged partners, we would like to
confirm that we are totally available for any comments or recommendations you may care to make.

MTZ_Gb_00284_070525.doc
LIST OF CONTENTS
CHAPTER 1 – SAFETY
1.1 Foreword
1.2 Instructions for safety and general use
1.3 General safety instructions
1.4 Special safety instructions
1.4.1 Possible risks incurred when using an “MTZ” type rail-cutting
machine
1.4.2 Quality of abrasive discs and recommendations for use
1.4.3 Personal protection equipment
1.4.4 Handling fuel
1.4.5 Transport - Handling
1.4.6 Operating
1.4.7 Pictograms and safety instructions
CHAPTER 2 – MACHINE DESCRIPTION
2.1 General
2.2 Positioning the machine in its guiding vice
2.3 Operator’s work area
2.4 General view
2.5 Technical details
CHAPTER 3 – INSTALLATION – SETTING-UP
3.1 Abrasive disc
3.1.1 Selecting the right disc
3.1.2 Fitting / replacing the disc
3.2 Fuel
3.2.1 Preparing the mix
3.2.2 Filling up with fuel
3.3 Adjusting the disc guard
3.4 Machine inspection
CHAPTER 4 - OPERATION
4.1 Marking the cutting line and setting up the guiding vice
4.2 Fitting to the rail – Fitting the rail-cutting machine onto the
guiding vice
4.3 Starting up the machine
4.4 Methods of cutting
4.4.1 General instructions for carrying out a cutting operation
4.4.2 Cutting straight through
4.4.3 Two-phase turn-around cutting
4.5 Stopping the machine
4.6 Removing from tracks – Dismantling the rail-cutting machine
from its guiding vice
4.7 Storage
4.7.1 General instructions for storage
4.7.2 Special instructions for storage
CHAPTER 5 – SERVICING / MAINTENANCE
5.1 Servicing
5.1.1 List of equipment and accessories required for servicing
5.1.2 Cleaning
5.1.3 Tightening
5.1.4 Carburettor
5.1.5 Silencer spark-arrester grid
5.1.6 Sparkplug
5.1.7 Belt
5.1.8 Replacing the starter cord
5.1.9 Tensioning the return spring
5.1.10 Replacing the return spring
5.1.11 Filtration system
5.1.12 Suction strainer
5.1.13 Cooling system
5.1.14 Replacing the rubber stops
5.1.15 Setting for perfect alignment when the machine is turned
round
5.2 Maintenance
5.2.1 Preventive maintenance schedule
5.2.2 List of normal wear parts
CHAPTER 6– SPARE PARTS CATALOG
6.1 Drawings and parts lists

1.1 SECT_Gb_00003_070426.doc 1.2
CHAPTER 1 – SAFETY
1.1 Foreword
The following set of rules has been drawn up to ensure the application of precautionary principles that help to preserve the safety of persons and property
when the machine is in use. Any failure to comply with these rules can have serious repercussions (bodily injury, etc.), and can even be fatal, so we must draw
your attention to the fact that all persons involved in the use, maintenance, storage or custody of the machine covered by the present manual must be familiar
with these rules.
Any users who cause an accident through failure to comply with these rules will be held personally responsible for the results of their actions.
1.2 Instructions for safety and general use
All persons using, servicing or repairing this equipment must have undergone the training, possess the skills, and have at their disposal the tools necessary to
carry out any such operations.
Before using the equipment, even in a maintenance context, it is necessary to read the corresponding instruction manual, together with its appendices, and the
safety rules in force in the workplace.
Comply carefully with the general safety instructions drawn up for the site by the person in charge of the site, especially if the work is carried out without
stopping or diverting traffic.
The equipment can only be used, serviced or repaired by competent personnel who have undergone thorough specialized training beforehand. The technical
documentation and the instructions are useful in completing the knowledge acquired during the training courses, but they can in no way replace theoretical and
practical qualifying training, provided in accordance with good professional practice.
If the operating company is not in a position to carry out the necessary training for its staff, at a satisfactory level, the GEISMAR/STUMEC Company is able
to provide advice concerning the training programme to be implemented.
The training must include an explanation of the various equipment functions, the instructions for use and maintenance, and the safety rules applicable, together
with practical exercises.
IMPORTANT! All persons using the machine must comply with the labour regulations in force
The GEISMAR/STUMEC Company cannot be held responsible for any modifications made without its
written approval, or for any assembly work not in conformity with its recommendations, especially in the
case of use of parts other than original manufacturer’s parts.

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1.3 General safety instructions
•The operator and the working environment
To avoid all risks of accident or injury, it is essential to wear:
-Sturdy, non-flammable clothing that is suitably close-fitting
-Strong, non-slip gloves
-Safety shoes
-Protective eyewear
-Safety helmet
-All other equipment necessary on the site or when using the machine
In the case of use of ear defenders, the safety instructions in force on the site must be complied with at all times.
Make sure that the machine vibrations do not lead to a loss of sensitivity in the hands. Adapt the working periods to the level of vibration caused by
the machine, which is shown within the framework of normal use.
Do not work with the machine if you are not sure that you can control it correctly. Do not start working with the machine until you are sure that you
can do so in full safety, for yourself (good conditions of visibility and lighting) and for other people (work calmly and carefully). Take care to ensure
you have a firm, stable footing; all unstable working positions must be prohibited.
The user must be in a physical and mental condition enabling work to be carried out without danger.
The work area must be free of all obstacles. The work area (and the surrounding areas) must be free of all flammable substances.
If anything does not seem clear to you, whether it concerns the machine or the work to be carried out, ask a qualified person for information. Do not
base your work on assumptions.
For underground use (tunnel or gallery), or in a closed area, make sure there is sufficient ventilation or extraction to avoid the risks generated by
inhaling exhaust gases or by their build-up.
This equipment must not be used in an explosive atmosphere.
Avoid working positions in which exhaust gases could come into contact with parts of the body, whether protected or not.
In a general way, take all necessary precautions to prevent flammable products from coming into contact with fire hazards.
The operator must ensure that no one else is within the working area. In particular, it is necessary to make sure that in the direction in which the
machine is travelling, no one can be hit. If someone is nonetheless in the path of the machine, the operator must stop and warn the person of his
passage.
When the machine is installed on the track, it must be handled only by the number of operators strictly necessary for its normal use.
As the overall size of the machines does not enable extinguishers to be carried on them, we strongly recommend placing extinguishers of an
appropriate type to deal with the fire hazards close to the machine.
The user must comply with all the regulatory environmental instructions applicable to the machine in use.

1.3 SECT_Gb_00005_110202.doc 1.3
•The operator and the machine
Before putting the machine into service each time, check that its condition and its operation are in compliance with the instructions.
In particular, make sure that the controls are free and in good working order, and that they are in the “stop” or “neutral” position. Never make any
modifications that could affect correct operation of the control systems.
All the protective elements must be kept carefully in place and in good condition.
Always keep the machine clean and remove any accumulated dust, especially if it could absorb flammable products.
Always move forwards when working.
When working, always hold the machine with both hands to ensure control at all times, and to be able to use it in full safety.
Never bring a machine close to a flame or a source of heat.
The machine must never be positioned close to hot or protruding elements that could damage some parts (tanks, exhaust, housings...).
Never move away from a machine while the engine is running, even when it is idling. Stop the engine immediately if the machine is not in use. After
stopping the engine, wait until all moving parts have come to a complete stop.
Work on the electrical installations on the machine can only be carried out by suitably qualified persons.
Read and make sure you fully understand all the signs placed on the machine, and always comply with all the instructions.
The signs placed on the machine include pictograms, manufacturer’s plates, and instruction labels. Make sure they are kept clean and replaced if
they have been damaged, or if they are missing or illegible. If one of these elements is on a part that is to be replaced, a new element must be present
on the replacement part. Please contact us on this subject.
When using a lifting device, the lifting operations of the machine must be done only using the lifting points indicated on the instruction manual.
When possible, the lifting of the machine is to be done only when the machine needs to be set in or out of the track. If the machine has to stay lifted
(for a maintenance operation for example), the hazardous area must be signaled/marked, so that no one can stay below the machine or walk close by.
THE MACHINE MUST NEVER BE USED FOR A PURPOSE OTHER THAN THAT FOR WHICH IT IS INTENDED
NEVER TOUCH A MOVING PART WITH A TOOL , OR WITH THE HAND , OR WITH ANY OTHER PART OF THE BODY
IT IS E ES SS SE EN NT TI IA AL L T TO O S ST TO OP P T TH HE E E EN NG GI IN NE EAND SET THE CONTROL TO THE STOP POSITION BEFORE CARRYING OUT :
- ANY HANDLING WORK
- ANY WORK TO CHANGE TOOLS OR SOCKETS
- ANY WORK INVOLVING FUEL OR OIL ( FILLING , TOPPING UP , CHECKING LEVELS , ETC .)
- ANY REPAIR , MAINTENANCE OR CLEANING WORK

1.3 SECT_Gb_00006_110202.doc 1.3
•Using and handling fuel and oil
It is essential to stop the engine and set the control to the stop position before carrying out any work involving fuel (filling up, checking
the level, draining, etc.).
Always keep suitable extinguishers ready for use in all areas where fuel is handled (storage, filling up, etc.).
Always store fuel and oil in separate cans specially designed for the purpose and bearing the labels required by regulations. They must be stored in a
safe place, well away from all types of fire hazard.
Each time a machine is started up, and while it is running, make sure that there are no fuel leaks from any part of the machine. If a leak is suspected,
stop the engine immediately and do not restart the machine until the leak has been repaired.
Never carry out any work on a fuel tank or handle fuel to fill a tank, or for any other reason, in an area where there could be a fire hazard (such as a
burning cigarette, a blowtorch, sparks, etc.) or substances that are incandescent or at a high temperature (such as welding spatters, slag, clinker, etc.).
All such work must always be carried out outdoors or in a well-ventilated area.
Always turn all mobile phones off while filling a tank with fuel or handling fuel.
Carefully tighten the fuel filler cap each time, and check that no fuel leaks from it.
Always remove a filler cap slowly, to enable any internal pressure to be released without spraying any fuel out. Take special care if the surrounding
temperature is high.
When putting fuel in a machine that has heated up, never fill the tank completely. Do not put in more than three-quarters of the tank capacity.
If fuel starts to boil in the tank when putting fuel in a machine that has heated up, screw the cap on again immediately and leave the machine to cool
down.
Make sure the fuel used is suitable for the type of engine on the machine. See the user manual for the engine.
Do not inhale fuel vapour.
If it is necessary to drain the fuel tank, pour the fuel into a container designed for the purpose and bearing the labels required by regulations. Always
close them tightly, even if they only contain a small quantity. Never use a glass container.
Never use fuel for cleaning work. Use only non-flammable, non-toxic products that are harmless for the user, the equipment and environment.
If fuel has been spilt near the filling area for any reason, clean it up immediately. Clean straightaway any spillage of fuel on the skin. Make sure no
fuel has been spilt on your clothes; otherwise, change clothes immediately. Remove all rags or other materials used to wipe fuel, and store them in a
safe place well away from all sources of heat or combustion. Move the machine well clear of any spilt fuel before starting it up (at least 6 metres
away), and do not move any closer to the area while the engine is running.
I N CERTAIN CASES HANDLING OIL CAN GIVE RISE TO THE SAME TYPE OF RISKS AS HANDLING FUEL . I T IS THEN ESSENTIAL TO TAKE THE
SAME PRECAUTIONS WITH OIL AS THOSE SET OUT ABOVE FOR FUEL .

1.3 SECT_Gb_00007_110202.doc 1.3
•Tools to be used on the machine
Use only the types of tools intended for normal use of the machine.
Measure the speed of all rotating tools at regular intervals.
Never use tools at speeds greater than the maximum speed for which they have been designed and approved.
Never use damaged tools or tools that have reached their maximum level of wear.
•The engine on the machine
Never touch the hot parts of the engine, and especially the exhaust pipe. If it is necessary to work on the engine, wait until it has cooled down.
Check the engine rotation speed at regular intervals, and especially after fitting tools or reassembling the machine. Adjust if necessary.
Never exceed the speed shown in the technical specifications.
After starting with the choke, remember to return the choke to the normal running position.
Never wind the starter rope around your hand, and never release it suddenly.
If the machine does not operate correctly after the engine has been started, stop the engine and inform the head of maintenance.
For petrol engines, use only spark plugs whose tops are as shown in drawing 1 opposite. If the plug is fitted with a
screw top, make sure the top is fully tightened. After fitting the spark plug, make sure that the plug cap is in good
condition and that it stays firmly on the plug. Carefully check the fastening system to make sure that no sparks can
be formed.
•Using trolleys (If applicable)
A machine designed to work on a trolley must not be used without the trolley. The trolley is thus an integral part of the machine. The machine and
the trolley must not be used separately.
Trolleys whose use is dedicated to a machine must never be used to transport equipment or personnel, or attached to a vehicle.
Before fitting the machine on its trolley, it must be placed correctly on the track to ensure that it can run freely. If it is on a sloping section of
track, make sure the trolley is kept immobile while the machine is being put on the track or taken off it.
Attention, the trolley takes up the full width of the track and can cause injuries to the legs if it hits someone.

1.4 MTZ_Gb_00285_070525.doc 1.4
1.4 Special safety instructions
1.4.1 Possible risks incurred when using an “MTZ” type rail-cutting machine
The main risks to users and other persons in the vicinity, liable to be caused by using ‘MTZ” type rail-cutting machines are :
Fires caused by handling fuel
Fires caused by sparks touching inflammable material.
Abrasive discs disintegrating due to use under non-compliant conditions (shocks, poor work conditions, faulty or unsuitable discs, etc.).
Injuries caused by flying sparks (specially protect eyes) or even broken discs being projected.
Severe burns caused by contact between a part of the body and the disc when in rotation.
Inhalation of grinding particles.
The disc jamming and the machine jerking upwards
If the disc jams during the cutting operation, this may make the disc disintegrate and the machine jerk upwards.
If the front of the disc jams (especially in the top quarter), the whole rail-cutting machine may be projected upwards and backwards in
an extremely violent rotating movement towards the operator, which can be lethal REARING-UP
To avoid the disc jamming:
1) Always hold the machine with two hand when it is running, one hand firmly holding the rear handle to keep the machine under control at all times, the
other on the front tubular –shaped handle. Put your thumbs around the other side of the handle to hold it properly.
2) Carry out the cutting operation without stopping (if possible). Only continue a cut that has already been started, on condition that the guiding vice has
not been moved and that the SAME machine is used with the same disc. Be extremely carefully when continuing a cut that has already been started.
3) Take all necessary precautions for avoiding the cut sections of rail coming together and jamming the disc during the cutting operation.
4) Always cut at full power.
Tilting the machine
When cutting, it is formally FORBIDDEN to tilt the machine over 45°
(See diagram opposite).
Above this angle, the operator is no longer capable of holding the
machine correctly and sufficiently firmly. This may result in the machine
jumping out of the slot being cut and jerking up violently towards the
operator. If this occurs, the rotating disc may hit the operator and cause
serious, even mortal injury.
Zone of
operation

1.4 MTZ_Gb_00286_070525.doc 1.4
1.4.2 Quality of abrasive discs and recommendations for use
•The engine must be stopped before any disc is changed.
•Only use discs that have been formally recommended for use with this type of machine and whose technical characteristics (maximum no-load speed, type
and dimensions), compulsorily marked on the disc by its manufacturer, comply with §2.5 "Technical characteristics / Abrasive disc" and the instruction
plate riveted onto the abrasive disc guard.
The operator is RESPONSIBLE for any accident that occurs when non-compliant discs are used.
•NEVER use an abrasive disc that is cracked, chipped or un-flat. Get rid of faulty discs immediately and replace them with discs in perfect
condition.
•NEVER use a taper sleeve on the abrasive disc centre bore.
•The outside diameter of the tightening flange must always be the same size as that of the motor drive-flange.
•Rotate any new or refitted disc for thirty seconds under no-load conditions, keeping all personnel at a distance during the test, except for the operator, who
must hold the machine in such a way that he is outside the disc’s rotation plane and on the closed side of the disc guard.
•NEVER touch a disc that is rotating with your hand or any other part of the body.
•Check that the disc cannot come into contact with any obstacle, especially sleepers or ballast.
•Do not hit or jam the disc when it is running, as this may cause it to disintegrate and have very serious consequences.
•Do not put any side-load on the disc. Only use the outside cutting edge of the disc.
•Before starting, always check that the disc is of sufficiently large diameter to carry out the complete cut.
•For safety reasons, never go over the maximum no-load rotation speed on the disc. Disc speed must be regularly checked for this reason.
•Regularly check the maximum disc speed under NO-LOAD conditions, especially after the machine has been re-assembled. Never check the maximum
speed when the disc is under load, as there is a very high accident risk under these conditions. To avoid any risk of accident, we recommend using a no-
contact electronic tachometer for this operation.
•Store abrasive discs in a dry place, protected from frost, sunlight and extreme heat. Position them so that they are not stored under any load liable to warp
them. Never use any abrasive disc after the “use before” date indicated by the manufacturer.

1.4 MTZ_Gb_00287_070525.doc 1.4
1.4.3 Personal protection equipment
•Personnel using this equipment must wear the clothing listed under
paragraph §1.3 “General safety instructions / The operator and his
environment”. He must also wear equipment to protect him against
sparks, such as a mask or glasses, a solid non-slip apron and gloves of
similar type, gaiters or boots in fireproof material.
•He must wear a helmet and safety boots with non-slip soles and steel-
reinforced toecaps.
•We also recommend use of a mask to avoid inhaling grinding dust.
•Ear protectors are also recommended (however,
railway regulations in force must be referred to, for
knowing whether this type of protection is allowed
or not).
1.4.4 Handling fuel
•Clean the area around the filler hole, to make sure that no impurities can
enter the fuel tank or damage the seal on the tank cap.
•Open the tank cap carefully to allow any excessive inside pressure (if
any) to escape slowly without any fuel being spattered outside.
•Never use a tool for opening the bayonet-locking cap. This could
damage the cap and lead to fuel escaping.
•Only use unleaded petrol with an octane rating of at least 90 RON.
DIESEL, METHANOL, ETHANOL and ALCOHOL are NOT TO
BE USED. Use of these products will increase risks of fire or explosion
liable to cause serious, even fatal injury to the operator and any other
persons in the vicinity.
•As petrol is highly inflammable, move the machine at least 6m from its
filling point before starting up.
•Use an accurately dosed petrol-oil mix as recommended in § 3.2.1
"Preparing the mix", to keep carbon deposits to a minimum, as they are
liable to create sparks in the exhaust pipe.
•Regularly check that the fuel cap is liquid-tight. Check the condition of
the ‘O’ ring on the cap. Replace it immediately if you see any fuel
leaking.
1.4.5 Transport - Handling
•Never transport the rail-cutting machine with the engine running, even
at idling speed.
•Only use the tubular handle to carry the machine with the disc facing
backwards.
•Never transport the rail-cutting machine in a vehicle with a disc
mounted in position. Attach the complete unit firmly in position during
transport.

1.4 MTZ_Gb_00288_070525.doc 1.4
1.4.6 Operating
•The rail-cutting machine must only be used by a single authorised
operator.
•The rail-cutting machine must ALWAYS BE USED WITH ITS OWN
GUIDING VICE. This must be fixed on the rail in the right position for
the cutting operation.
•If works are being carried out on a double-track, pay special attention to
any traffic running on the track still in use. In any case, the rail-cutting
machine must only be used in compliance with railway authority
instructions applying to its place of operation.
•This machine has been designed and built solely for cutting railway
rails. Any other use different from those described in this manual will
be considered “non-compliant” and will release the constructor from
any liability whatsoever, this being totally borne by the user.
“Compliant use” implies observation of all the recommendations
inherent to the use and maintenance of the machine described in this
manual. All instructions recommended and described for preventing any
occupational accidents must also be followed, whilst taking account of
all general regulations in force in terms of safety, occupational medicine
and legislation, at the same time.
•Before starting the machine, check that the disc and belt guards are in
good condition and that they are correctly fixed in place. Never modify
them.
•Install a new guard every time an abrasive disc breaks up or when the
guard appears to be in poor condition.
•Never use ether or any similar product to help start the engine.
•Do not operate the machine using the forced acceleration device. This
should only be used when starting up.
•Never leave a rail-cutting machine by itself when the engine is idling.
Stop the engine as soon as the machine is no longer in use. Before
putting the machine down, wait until the disc has completely stopped
turning.
•The engine must ALWAYS be stopped before carrying out any repair or
maintenance operation. If the engine has to be run (for setting the
carburettor or checking maximum no-load speed), make sure that the
work area is correctly ventilated.
•Never use a rail-cutting machine with a faulty exhaust system (risk of
fire and damage to hearing).
•Make sure that there is no-one present in the machine’s area of action.
As particles may be thrown over long distances, sufficient space must
be left between the axis of the rail-cutting machine and any persons
close-by. If this is not possible, try to direct the spark flow in a direction
where there is no danger (either directly or by rebound). Otherwise,
install a fireproof screen for catching any sparks.
•During cutting, projection of incandescent sparks
creates a risk of fire. If necessary, place a screen in
position for intercepting the flow of sparks before they
can reach any inflammable matter (danger of brush
fires in summer).
•As soon as the engine starts running, it gives off toxic
exhaust gasses. These gasses may be odourless and
invisible. Never use the machine in confined or poorly
ventilated spaces. When working in ditches, dips in
the ground or enclosed areas, always make sure that
there is adequate ventilation. Danger of intoxication.
•Perfect idling speed adjustment is particularly important for preventing
the disc from turning when the accelerator trigger is released (please see
§5.1.4 "Carburettor" if any adjustment is required). NB: Even when the
accelerator trigger has been released, the disc will continue to rotate for
a short moment.
•If compressed air is used for cleaning, protective and a mask or glasses
must be worn. Air pressure must be under 2 bars at the outlet nozzle.

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1.4.7 Pictograms and safety instructions
Pictograms and safety instructions are compulsory on the rail-cutting machine, and must be placed at the position indicated.
If any of them be missing or damaged, a new label must be ordered immediately and be installed in the position provided for.
If any part holding a label has been replaced, make sure that a new label has been put in place on the replacement part.
Reference: N°
75017
Position: Riveted on the disc
guard
Reference: N°
0000 967 3759
Position: Glued to the filter cover
Reference: N°
750
21_A
(yellow background)
Position: Sticked to the tank housing. Below the
combined start and stop lever.
Reference: N°
75022_A
(yellow background)
Position: Sticked to the cutting machine housing,
under the filler cap.

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CHAPTER 2 – MACHINE DESCRIPTION
2.1 General
Constructor: GEISMAR / STUMEC
Route d’Italie
38110 LA TOUR DU PIN
FRANCE
Name of equipment: Lightweight rail cutting machine
Type: MTZ 350S ; MTZ 350AS ;
MTZ 400S ; MTZ 400AS
The new reference in rail cutting, the lightweight railsaw MTZ, comes
from a partnership between Geismar and Stihl. It includes several new
technologies and patents :
• Exeptional cutting performances :
- One of the shortest cutting time of the market ;
- And accuracy that comply with the most severe standards for high-
speed railway lines.
• An exceptional comfort :
- With a patented Comfort Cushion
TM
system that gets rid of the rail
cutting vibrations ;
- A reduced sound level thanks to a new muffler;
- And a reduced weight that makes it one of the lightest machine of the
market.
• Important savings for the user :
- Extended lifespan of the disc (up to 20%) ;
- A patented air filter system with a cyclonic pre-filtration demanding
twice less maintenance than most railsaws.
2.2 Positioning the machine in its guiding vice
The following diagram shows the machine’s dimensions in relation to low-
level guiding vice UIC 505-1 (track with a nominal gauge of 1435).
2.3 Operator’s work area
In normal operating conditions, the area available to the operator for
running the machine is between the two rails on a same track.
Should the cutting operation have to be made the other way round,
carefully check safety conditions, especially if there is traffic still
running on the other track.
8
70
150
450
WORK AREA

2.4 MTZ_Gb_00291_070525.doc 2.4
2.4 General view
Ref. Name
A Priming pump
B Starter handle
C Tubular front handle
D Disc guard orientating
handle
E Belt guard
F Air filter cover
G Fuel tank cap
H Guiding vice
J Abrasive disc
K Choke lever
L Combined action lever
M Accelerator trigger lock
N Rear handle
P Disc tightening plate
Q Disc guard
R Exhaust muffler
S Accelerator trigger
B
A
E
G
R
J
S
C
L
F
Q
M
D
K
P
N
H

2.5 MTZ_Gb_00292_071120.doc 2.5
2.5 Technical details
* These values are average for a machine in good running order, but may vary from one machine to another.
(1) Measurements done according to NF EN ISO 11204 while machine working.
(2) Measurements done according to NF EN ISO 3746 while machine working.
(3) Measurements done according to NF EN ISO 5349 while machine working.
MTZ 350 S MTZ 400 S
Average cutting time (UIC60 rail)…….……………................ 1’15’’ 1’15’’
Machine dimensions
Length / width / height (without disc)…......…......... mm 760/315/430 770/315/455
Weight
Machine (empty)….…………………………………. kg 16,5 17
Machine (in operating condition)...…………………. kg 18,2 19,1
Guiding vice……...…………………………………. kg 6,9
Noise *
Acoustic pressure level (when cutting) (La eq )
(1)
dB (A)
102 (±2) 102 (±2)
Acoustic power level (Lwa)
(2)
…………………
dB (A)
113,3 (±2) 113,3 (±2)
Vibrations *
Vibration level (accelerator handle) (Aeq)
(3)
.………..
ms
-2
6,2 (±2%) 8 (±2%)
Vibration level (tubular front handle) (Aeq)
(3)
……… ms
-2
7,1 (±2%) 8,2 (±2%)
Estimate of vibration levels for one hour’s use over
an 8-hour working day (Aeq)
(3)
..…......................... ms
-2
2,5 (±2%) 2,8 (±2%)
Machine
Electronically adjusted maximum speed *..…………. rpm 9800
Disc rotation speed (maximum without load) *.......... rpm 4520 4150
Idling speed *..………………………………………. rpm 2200
Belt tension ……………………………..…………… ……….. Semi-automatic
Protective guard…...…………………………………. ……….. Adjustable in reinforced
aluminium
Safety device preventing the machine from being
used without its "guiding vice"……………………... ……….. Available on models MTZ 350AS and MTZ 400AS
Maximum disc diameter …...………………............. mm 355 (14") 406 (16")
Fixing flange …...…………………………………… ……….. With elasticity compensation
Stability of machine on the ground ….…………….. ……….. Feet
Fixing system between the engine chassis and the
one-piece disk support
unit……...…………………………………………... ……….. Patented with vibration
absorption :
Comfort Cushion
TM
MTZ 350 S MTZ 400 S
Disc
Outside diameter..…………………………………… mm 355 (14") 406 (16")
Thickness……………………………………………. mm 4 (1/8") 4 (1/8")
Centre bore………..…...……………………………. mm 25,4 (1") or 22,2 (7/8")
Maximum disc rotation speed ……..…………........ rpm 5350 4700
Type of disc ………………………………...………. ……….. Fabric insert reinforced resinoid
bond
Number of cuts per disc …………………................ ……….. 4 to 7 5 to 8
Engine
Power (at 9000 RPM)……………………................ kW 5 (= 6,8 HP)
Cylinder bore……..…………………………………. mm 56
Piston movement ...…………………………………. mm 40
Carburettor.………………………………..…........... ……….. Double membrane chamber
Operating cycle………...……………………………. ……….. 2-stroke with double air flow
Cooling ……………………….………..…………… ……….. Air
Ignition...……………………………………………. ……….. Electronic with high capacity
sparking
Resistor-type sparkplug …………………………….. ……….. Bosch WSR 6, or NGK BPMR 7 A
Gap between electrodes 0.5
Filtration system ….………………………..……….. ……….. Triple filtration with cyclonic
pre-filtration
Filter replacement times (approximate)………......... h 14
Fuel tank capacity.……………………………......... liter 1,2
Fuel consumption………………..…..…………. l/h 1,7
Fuel (variable mix depending on oil used 1 :25 or
1 :50)....……………...…………...………………… ……….. Mix (oil – unleaded petrol)
Starting system…………..……………………......... ……….. Hand-starter with automatic
return and Elastostart system

3.1 MTZ_Gb_00293_070525.doc 3.1
CHAPTER 3 – INSTALLATION – START-UP
3.1 Abrasive disc
3.1.1 Selecting the right disc
The disc to be used must be marked as having a working speed higher or equal to the speed shown on the machine information plate. Never go beyond the
speed given on the disc.
The disc’s technical characteristics must correspond to those stipulated in § 2.5 “Technical characteristics / disc”.
The disc centre bore MUST ALWAYS correspond to the centre diameter on the engine drive plate.
Never use a disc that is cracked, chipped or deformed (non-flat). Never use a disc that is damaged. Do not use any disc that has been dropped.
Inspect all discs systematically before fitting them to the machine.
3.1.2 Fitting / replacing the disc
ONLY fit or replace the disc with the motor stopped and the combined action lever Ref.①in position « 0».
➊ Hold the shaft in position by inserting rod Ref.④through the
hole in the pulley, the hole in the belt guard Ref.⑤and the front
bearing housing Ref.②.
➋ Using the multi-purpose spanner, unscrew the retaining screw
Ref.⑧.
➌ Remove flange Ref.⑦and the disc Ref.⑥to be replaced (if
necessary).
➍ Install the disc and put the flange back in position (the pins on the
flange must be in line with the slots on the shaft).
Never use a taper sleeve on the disc centre bore.
The outside diameter of fixing flange Ref.⑦
⑦⑦
⑦must be
systematically the same diameter as the motor end flange
Ref.③
③③
③.
➎ Screw in the lock screw and tighten firmly with the multi-purpose
spanner (the tightening torque should be about 30Nm).
➏ Pull out the rod from the belt guard.
1
8
6
7
4
3
5
2

3.2 MTZ_Gb_00294_070525.doc 3.2
3.2 Fuel
3.2.1 Preparing the mix
The two-stroke engine on the rail-cutting machine runs on a petrol and motor oil mix. The quality of these elements and the mix ratio have a decisive
influence on the way the engine runs and the length of its service life.
•Petrol Only use unleaded petrol with an octane level of at least 90 RON.
DIESEL, METHANOL, ETHANOL and ALCOHOL are NOT TO BE USED
•Motor oil Only use good-quality oil intended for air-cooled two-stroke engines. Preferably, STIHL 2-stroke oil should be used. It is specially designed
for STIHL engines and guarantees the longest possible service life. Do not use oil designed for water-cooled engines, or oil for 4-stroke engines.
•Preparing the mix Always make the mix in a clean recipient approved
for the fuel used.
➊ Start by pouring in half the petrol to be mixed
➋ Pour in all the oil.
➌ Mix by shaking the recipient.
➍ Pour in the remaining petrol.
➎ Mix the fuel together again before filling the machine tank.
Proportions:
-STIHL oil for two-stroke engines
1:50 = 1 volume of oil + 50 volumes of petrol.
-Other good quality oil for two-stroke engines
1:25 = 1 volume of oil + 25 volumes of petrol.
•Storing the mix Mixes made of unleaded petrol do not remain stable for a long time. So, they must NOT be prepared in advance, but as and when
required.
Petrol STIHL two- stroke oil Other quality two-stroke oils
1:50 (2%) 1:25 (4%)
1 0,02 0,04
5 0,10 0,20
10 0,20 0,40
15 0,30 0,60
20 0,40 0,80
25 0,50 1,00
Unit = liters
+

3.2 MTZ_Gb_00295_070525.doc 3.3
3.2.2 Filling up with fuel
Shake the can containing the mix vigorously before filling up the tank. There may be a pressure build-up in the can. Open carefully.
Before filling, clean the cap and its vicinity carefully to prevent any foreign matter from getting into the tank.
Position the machine so that the filler cap faces upwards.
Never fill up with the engine running.
Never fill up with the machine mounted on its guiding vice.
•Opening the cap (Fig.1): Push the cap downwards to the stop position by hand, turn anti-clockwise (about 1/8 of a
turn) and remove the cap.
Open the tank filler cap with care so that any excessive inside pressure can escape slowly without spraying
any fuel outside the tank.
Never use a tool for opening the bayonet-locking cap. This could damage the cap and lead to fuel escaping.
•Fill up the tank in a well-ventilated area and never close to any possible sources of ignition, such as blowlamps,
sparks or welding residue.
When filling, take care not to spill the fuel and never fill the tank completely. Only add enough fuel for filling up
the tank to ¾ of its maximum capacity.
•Closing the cap (Fig.2): Put the cap into position and rotate it until it slips into the bayonet slots. Push the cap down
by hand to the stop and rotate it clockwise (about 1/8 of a turn) until it is engaged in position.
•Carry the machine at least 6m away from the filling point before starting it up.
3.3 Adjusting the disc guard
The position of the disc guard Ref.③can be adjusted to suit the operator and
the position in which the cutting operation is to be carried out.
Its position must be adjusted not only to avoid it being a hindrance during
the cutting operation, but also to direct the sparks as far away from the
operator’s feet as possible.
With the machine standing on the ground and the engine at a standstill, take
a firm hold on the front handle Ref.①with one hand and adjust the position
of the disc guard with the other hand, using handle Ref.②. The disc guard
can be moved over an angle of up to 35°.
Fig.2
2 3 1
4
Fig.1

3.4 MTZ_Gb_00296_070525.doc 3.4
3.4 Machine inspection
Before using the machine, a visual check must be carried out by a competent, authorised person to discover any possible problems.
This inspection mainly includes visual and functional checks.
This inspection phase is carried out to ensure that the different elements are in good condition and have not suffered from any damage during transport or
storage.
•Check on protective guards and moulded units (this check is made with the engine at a standstill)
Carry out a visual check to make sure that there are no external defects, deformations, superficial cracks, marks, wear or corrosion.
•Check the fuel level (this check is made with the engine at a standstill)
Check the fuel level and add fuel if required ( : See §1.3 “General safety instructions” / “Using and handling fuel” and 3.2.2 “Filling up with fuel”).
•Check operational elements (these checks are made with the engine at a standstill)
-Check that the following elements operate correctly: the accelerator trigger, the accelerator trigger lock and the combined action lever. All these devices
must move freely and not have undergone any modifications.
-Check that the disc rotates freely.
•Check safety devices
-Make sure that the handles are clean and dry.
-Start the engine ( : See §4.3 “Starting up the machine”) and check that it stops when the combined action lever is turned to the ‘0’ position.
-Make sure that the disc does not rotate when the accelerator trigger is released (See §5.1.4 "Carburettor" if any adjustments are required)
-On models MTZ 350AS and MTZ 400AS, check that the safety system works correctly for preventing the rail-cutting machine being used without its
guiding vice. To do this, start up the engine ( : see §4.3 “Starting up the machine”) and check that it stops when the unit is separated from its guiding
vice.
S
HOULD ANY ANOMALY BE REVEALED DURING THE INSPECTION PHASE OR DURING USE , THE MACHINE MUST SYSTEMATICALLY BE
REPAIRED AND BE REMADE COMPLIANT BY SKILLED PERSONNEL OR THE CONSTRUCTOR BEFORE IT IS RE - USED .