Ntc Rz 122 User manual

OPERATION MANUAL

ASPHALT AND CONCRETE CUTTERS

Models: RZ 122, RZ 172, RZ202

NTC STAVEBNÍ TECHNIKA spol. s r.o.

Jiinková 120, 552 03 Česká Skalice

Czech Republic

Tel.: +420 491 452 184 fax: +420 491 401 609

E-mail: ntc@ntc.cz www.ntc.cz

ORIGINAL OPERATION MANUAL

(2006/42EC)

(version 01/2017)

Asphalt and concrete cutters Operation manual

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issued 01/2017

ES/EU PROHLÁŠENÍ O SHODĚ(originál)

EC/EU Declaration of Conformity (original)

Prohlašujeme, že zařízení definované níže uvedenými údaji je ve shoděs požadavky níže uvedených NV a směrnic

We declare that the trough belowmentioned specifications defined equipment complies with requirements of below cited Directives

Výrobce (manufacturer):

Sídlo firmy (company domicile):

Sídlo provozovny:

NTC STAVEBNÍ TECHNIKA spol. s r.o.

Jiinkováá 120, Česká Skalice 552 03

(office premises)

IČ(identification number): 63221152

Osoba pověřená sestavením a NTC STAVEBNÍ TECHNIKA spol. s r.o.

uchováváním technické dokumentace:

(Person in charge of assembling

and storing technical documentation)

Název (model): ŘEZAČSPÁR / FLOOR SAW

Typ (type): RZ 122, 172, 202

Výrobní číslo (serial number)

Popis (description):

Všechna příslušná ustanovení,

která výrobek splňuje

(The product meets all relevent provisions)

Strojní zaízení – smrnice 2006/42/ES; NV č.176/2008 Sb.

Machinery Directive 2006/42/EC

Emise hluku – smrnice 2000/14/ES; NV č.9/2002 Sb.

Noise Emission 2000/14/EC

Elektromagnetická kompatibilita – smrnice 2014/30/EU; NV č.117/2016 Sb.

Electromagnetic Compatibility Directive 2014/30/EU

Harmonizované technické normy a

technické normy:

ČSN EN ISO 12100, ČSN EN ISO 13862

ČSN EN 60204-1 ed.2, EN ISO 14982:2009

(The harmonized technical standards

and technical standards)

Naměřená hladina akustického výkonu: LWA =

(Measured sound power level)

Garantovaná hladina akustického výkonu: LWA =

(Guaranteed sound power level)

Poznámka: Veškeré pedpisy byly použity ve znní jejich zmn a doplkplatných v dobvydání tohoto prohlášení bez jejich citování.

Note: All regulations were applied in wording of later amendments and modifications valid at the time of this declaration issue without any citation of them.

Místo a datum vydání: Osoba zmocnná k podpisu za výrobce:

Place and date of issue: Signed by the person entitled do deal in the name of producer:

Česká Skalice, 01.09.2012

Jméno (Name): Funkce (Grade) Podpis (signature)

Ing. Petr Ratsam jednatel společnosti (Company Executive)

ezače spár jsou určeny pro ezání spár do asfaltových a betonových povrch, nap. pi opravách vozovek,

prmyslových ploch apod. Pohon ezače spár je zajištn čtydobým jednoválcovým motorem HONDA (čistý výkon

GX270 - 6,3 kW / GX390 - 8,72 kW).

Asphalt and concrete cutters are designed for cutting of joints in asphalt or concrete surfaces, i.e. at repairs of

roads, industrial areas, etc. The machine is driven with four-stroke single-cylinder engine HONDA

(net power GX270 - 6,3 kW /GX390 - 8,7 kW).

RZ122 - 99 dB, RZ172 - 101 dB, RZ202 - 101 dB

RZ122 - 103 dB, RZ172 - 105 dB, RZ202 - 105 dB

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Congratulations! You have purchased an asphalt and concrete cutter NTC. You receive high-

quality and powerful machine, intended for professional use under the heaviest conditions.

Read carefully this operation manual before starting the machine and always keep the instruction -

this way you will secure safe operation, high working output and long durability of the machine.

The manufacturer bears no responsibility for damages arising from not keeping the operation

manual.

This machine was manufactured by NTC STAVEBNÍ TECHNIKA spol. s r.o.

Address:

Jiinková 120

552 03 Česká Skalice

Czech Republic

Phone: +420 491 452 184, fax: +420 491 401 609

E-mail: ntc@ntc.cz

NTC STAVEBNÍ TECHNIKA spol. s r.o. is a light construction equipment manufacturer with a long-

term experience. NTC machines are exported to many European countries, among others to Spain,

Netherlands, Italy, Hungary, Romania and Russia.

NTC has certified quality control system according to ISO 9001:2009.

All manufactured models undergo testing, measuring and consideration of safety risks; all machines

conform to safety standards and bear the CE mark.

CONTENT:

1. SAFETY INSTRUCTIONS ...............................................................................................................................5

1.1. GENERAL INSTRUCTIONS FOR OPERATION OF LIGHT CONSTRUCTION EQUIPMENT ..............................................5

1.1.1. Requirements for qualification of the operator .......................................................................................5

1.1.2. Contractor's obligations..........................................................................................................................5

1.1.3. Operator's obligations.............................................................................................................................5

1.1.4. Operation of the machine........................................................................................................................5

1.1.5. Maintenance and Service.........................................................................................................................6

1.1.6. Transport and Storage.............................................................................................................................6

1.2. PROHIBITED ACTIVITIES.....................................................................................................................................7

1.3. HYGIENIC PRINCIPLES........................................................................................................................................7

1.4. ENVIRONMENTAL PRINCIPLES............................................................................................................................7

1.5. LIQUIDATION OF THE MACHINE..........................................................................................................................7

1.6. SAFETY INSTRUCTIONS…………………………………………………………………………………8

1.7. HYGIENIC DATA.................................................................................................................................................8

1.8. LIST OF SAFETY DECALS………………………………………………………………………………….9

1.9. DISPOSAL OF PACKAGING MATERIAL………………………………………………………………10

2.0 TECHNICAL DESCRIPTION…………………………………………………………………………….10

2.1. BASIC TECHNICAL DATA:................................................................................................................................11

2.2. LUBRICANTS ...................................................................................................................................................11

2.3. IDENTIFICATION ..............................................................................................................................................11

2.4. ENGINE IDENTIFICATION..................................................................................................................................12

3. PRIOR TO STARTING...................................................................................................................................12

3.1. CHECK -OIL LEVEL.........................................................................................................................................12

3.2. VISUAL INSPECTION OF THE MACHINE ............................................................................................................13

3.3. ADDING FUEL..................................................................................................................................................13

3.4. CHECK -AIR FILTER........................................................................................................................................13

3.5. MACHINE TIPPING.........................................................................................................................................13

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4. OPERATION....................................................................................................................................................14

4.1. STARTING........................................................................................................................................................14

4.1.1. Gasoline Engines HONDA and ROBIN.................................................................................................14

4.2. OPERATION .....................................................................................................................................................14

4.2.1. Selection of the Cutting Disc .................................................................................................................14

4.2.2. Fastening of the Cutting Disc................................................................................................................16

4.2.3. Cutting...................................................................................................................................................16

4.2.4. Cutting Depth Scale...............................................................................................................................16

4.3. ENGINE TURNING-OFF ....................................................................................................................................16

4.4. HANDLING,TRANSPORT,STORING..................................................................................................................17

4.4.1. Manual Handling...................................................................................................................................17

4.4.2. Handling by Crane ................................................................................................................................17

4.4.3. Handling by Forklift..............................................................................................................................17

4.4.4. Transport...............................................................................................................................................17

4.4.5. Storage...................................................................................................................................................17

4.5. SPECIAL CONDITIONS OF OPERATION ..............................................................................................................17

4.5.1. Work at Low Temperatures....................................................................................................................17

4.5.2. Work at High Altitudes ..........................................................................................................................17

4.5.3. Work in Dusty Environment...................................................................................................................17

5. MAINTENANCE..............................................................................................................................................18

5.1. MAINTENANCE OF THE ENGINE .......................................................................................................................18

5.2. TENSIONING OF THE DRIVE BELTS ..................................................................................................................18

5.3. INSPECTION OF BOLTED CONNECTIONS...........................................................................................................18

5.4. ADJUSTMENT OF ENGINE SPEED......................................................................................................................18

6. MAINTENANCE SCHEDULE.......................................................................................................................20

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1. SAFETY INSTRUCTIONS

1.1. General instructions for operation of light construction equipment

1.1.1. Requirements for qualification of the operator

1. The machine must be operated by

trained reliable operators of age above

18. The operator must read and

understand the safety instructions, the

regulations valid for the respective

jobsite and valid technological

procedure. This should be proved by

getting the operator’s signature.

2. The operator is obliged to use suitable

working dress, safety gloves and firm boots

with hard tip. Do not wear loose or torn

clothes, chains or jewelry that could be

caught by moving parts of the machine. The

operator is obliged to use safety goggles and

ear protection.

3. The machine may be used for intended

purpose only, in accordance with this

operation manual.

1.1.2. Contractor's obligations

The contractor is understood to be a physical or

legal person that carries out construction works

and for such purpose uses construction

equipment. The contractor is responsible for

operational safety.

The contractor is obliged to:

•designate the operator and arrange his

training

•ensure safe working conditions

•inspect attendance of the safety

regulations

•inspect that the operator works with the

machine in accordance with the Operation

Manual

•ensure regular inspections, maintenance

and repairs of the machine

•store the Operation Manual so that it is

readily available

•arrange suitable, safe and adequate

storing of the machine when not in use

The contractor is also responsible for proper

attendance of lawful regulations of work safety

and regulations valid for each respective jobsite.

1.1.3. Operator's obligations

The operator is to be designated by the

contractor, while keeping conditions of the

article 1.1.1.

The operator is namely obliged to:

•prior to starting, he should read and

understand the Operation Manual

including the safety instructions

•attend all instructions of the Operation

Manual

•learn about the jobsite and the locally

valid safety regulations; these must be

kept during the work

•pay full attention to operation of the

machine

•arrange that regular inspections,

maintenance and repairs of the machine

are carried our as according to the

Operation Manual

•require from the contractor proper

conditions for keeping safety instructions,

regular inspections, maintenance and

repairs

•avoid damage, misuse or unauthorized use

to the machine, namely by proper storing

the machine to a secured place

1.1.4. Operation of the machine

When operating the machine, following steps

need to be done:

1. Before starting inspect the machine visually,

mainly all protective elements (for example

covers) and controls. Also check the fuel

system for fuel leakage and engine oil

leakage. In case of finding any failure it is

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prohibited to operate the machine until

fixing the problem.

2. During operation use suitable working dress

required by related regulation (helmet, ear

protection, protective glasses, gloves, shoes,

etc.) Don’t wear loose or torn clothes, chains

or jewelery which could be caught by

moving part of the machine and cause

injury.

3. Before beginning the work check if it is

possible to start the machine without

causing harm to the operator or other people.

4. Don´t start the engine in closed rooms, if

sufficient air ventilaiton isn´t ensured.

5. During operation pay full attention to

operating the machine, to not cause harm to

the operator or other people or to not cause

any collision with obstacles or other

machines and vehicles.

6. Check the machine during operation for any

unusual noise or for smoke which could

signalize any defect. In such cases stop the

operation immediately and arrange repair of

the machines.

7. Stop the engine before refuelling. Avoid

contact of fuel and hot parts of the engine.

Don´t fill the fuel up to the edge of the tank.

Clean any fuel which runs over the tank.

8. It is necessary to keep the fuel tank tightly

closed. Close the fuel tap when not in

operation. Drain the fuel before transporting

the machine for longer distances.

DANGER! Leaking fuel tank and distribution

may cause explosion. Replace these parts

immediately if damaged.

9. It is prohibited to operate the machine in

areas with danger of explosion of flammable

gas or dust.

10. If operated in closed spaces (halls, tunnels,

pits), sufficient air ventilation must be

ensuredo not operate the machine in areas

with explosion danger.

11. After finishing operation, turn the engine off

and store the machine in a safe place and

secure it against stealing or unauthorised

use. Store the machine so it would not fall or

overturn or hinder the movement of other

machines or vehicles.

1.1.5. Maintenance and Service

1. Check the technical condition of the

machines regularly, with special attention to

proper function of protective and control

units. In case of any defects ensure the

repair.

2. Service works can be done only by qualified

person authorized by the machine user or

worker by service company.

3. Service works can be done only at such

place, where the ecological regulation,

cleanness and safety of the work. If possible,

do the service work in workshop with

sufficient equipment.

4. Service works can be done only when

engine is turned off. If the engine needs to

be started for some purposes, pay full

attention to work safety.

5. Always use only original spare parts. Only

original spare parts were tested by the

manufacturer and guarantee safe machine

operation.

6. Any changes and modifications of the

machine can be done only with explicit

approval of the manufacturer.

1.1.6. Transport and Storage

1. It is allowed to use only equipment with

sufficient carrying capacity for loading and

transporting the machine (machine weight is

mentioned in chapter “Basic technical

parameters”.

2. When loading the machine by crane, it is

necessary to oblige the valid rules of

working with crane. This can be done only

qualified person with proper authorization.

3. Attach the hoist belts to indicated machine

spots.

4. When manipulating by hand, usually

cooperation of more people is necessary, so

the maximum lifting limit for one person

would not be broken.

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5. Always secure the machine against falling,

tipping or sliding during transport. 6. Machine can be transported only in upright

position with hand brake engaged.

1.2. Prohibited activities

Never:

•use the machine for other than intended

purposes

•use the machine in other way than as

described in the Operation Manual

•operate the machine drunk or intoxicated

•operated the machine if its operation

could cause harm to other people

•start and operate the machine if there are

other people within the dangerous area

•operate the machine if some safety device

(i.e. cover) is damaged or missing

•operate the machine in areas with external

risks (risk of soil flow, dangerous fumes,

risk of explosion, risk of electrical shock,

etc.)

•operate the machine in areas where its

operation may cause damage to buildings,

structures or utility lines

•operate the machine within the protective

range of power lines or transformer

stations

•operate the machine under poor visibility

or at night, unless the jobsite is

sufficiently illuminated

•leave unprotected machine

•disable or modify safety devices,

protective and safety systems

•operate the machine with leaking oil, fuel

or other liquids

•start the engine in other way than

described in the Operation Manual

•clean a running machine

•smoke or use naked flame when refueling

1.3. Hygienic principles

Oil derivates (fuel, lubricants) as well as paints

and thinners are harmful agents. Anyone who

gets into contact with such agents is obliged to

protect himself and follow general principles

health protection as well as to follow

instructions valid for each specific agent.

Pay special care to:

•skin care

•wash hands properly after finishing the

work and apply suitable cream

Store the fuels, lubricants, paints, thinners,

cleansing and conservation agents, as well as

other dangerous agents in original containers,

properly sealed. Never allow storing in

unmarked bottles or containers or even in

beverage bottles. Store such agents in safe place,

out of reach of children.

In case that the agent gets into touch with skin

or eyes, or when it is eaten or inhaled, apply the

first aid and get immediately medical aid.

1.4. Environmental principles

Fuel, lubricants and other operational fluids are

harmful to environment. This category also

includes part of the machine that get into contact

with operational fluids, such as filter and

hydraulic hoses.

After use these belong to dangerous waste.

Pay high attention to avoid leakage of the fluids

and their escape into soil or water (including the

sewage).

Store the fluids in such manner, that the fluids

gets caught in case of accidental leakage.

If these agents still escape, arrange their safe

collection and liquidation.

1.5. Liquidation of the machine

By liquidation of the machine after its lifefime

the user is obliged to meet the requirements of

all regulations of wastes and environmental

protection. Engine oil has to be drained and used

filters have to be removed from machine for

liquidation.

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In accordance with regulation of wastes the

owner of liquidated machine needs to oblige:

-pass the iron parts only to companies

who are authorised to handle and

dispose of this kind of waste

-pass the used engine oil only to

companies who are authorised to handle

the waste oils

NTC is not responsible for harm of user´s health

or environment in case of breaking higher

mentioned hygienical an ecological rules.

1.6. Safety Instructions

Besides of general safety instruction, the

following special instruction must be followed:

1. Prior to starting the work, find out where are

underground spaces, utility lines, etc.

2. Never remove the blade cover when the

engine is running.

3. After stopping the engine, wait till the blade

gets fully halted.

4. After fitting the cutting blade, pace on the

cover and secure it.

5. Be sure to remove the wrenches from the

blade shaft!

6. Do no allow other people close to running

machine.

7. DANGER!

The cutting blade is always turning as soon

as the engine is started. The revolving blade

presents a risk of injury!

1.7. Hygienic data

RZ 122 RZ 172 RZ 202

Declared noise emission level at the

operator LpAd [dB]

90 92 92

Guaranteed sound power level

LWA,G [dB]

99+4 101+4 101+4

Acceleration transferred to hands

ahvd [m.sec-2]

10,42+4,17 5,22+2,09

Information for users of above mentioned machinery, requested by directives: 2003/10/ES –

exposure of operators to noise and 2002/44/ES – exposure of operators to vibrations (czech

equivalent NV no. 272/2011 Sb.):

With regard to declared acoustic pressure value A at working place of the operator and to declared

aggregate value of hand-arm vibrations transferred to the operator it is necessary to use protective

equipment effective against above mentioned noise value and hand-arm vibrations when operating

the particular type of the floor saws and further it is necessary to modify the working processes

because of setting technological breaks due to reduce the exposure of the operator to the hand-arm

vibrations.

5,22+2,09

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1.8. List of used safety stickers

In accordance with requirement of regulation no. 22/1997 Sb. about technical requirements of products,

there are decals of safety marks and symbols placed on mentioned models of floor cutters (models – in

point 2.1.). Images of these decals are in accordance of appropriate technical ČSN directive.

The individual decal types are describe below, in the order of their placement on the machine. There is

explaining text attached to each decal and symbol below.

1. Associated decal containing safety marks according to ČSN

ISO 3864 (symbol no. B.2.5, B.3.1 and NB.2.26), mark

according to ČS ISO 6405-1 (symbol no. 7.28) and information

for machine operation in practice.

Safety mark, symbol no. B.2.5 instructs the operator to wear the

ear protection for the whole time of operation.

Mark, symbol no. 7.28 instructs the operator to read manual

before starting operation.

Safety mark, symbol no. NB.2.26 instructs the operator to use

protective gloves as protection against vibration for the whole

time of operation.

Alert safety mark, symbol no, B.3.1 (exclamation mark) warns

the operator of danger risk.

Information for the operator how to acts when repairing,

cleaning or adjusting the machine.

2. Decal of symbol no. 7.23 according to ČSN ISO 6405-01 (decal

marks the spot, which should be lubricated with grease,

according to operation manual).

3. Decal of symbol no. 8.1according to ČSN ISO 6405-1 (decal

marks the spot, where the engine oil drain bolt is located).

4. Associated decal containing warning mark no. B.3.1 according

to ČSN ISO 3864, further warning symbol and text of safety

orders important for operating the machine.

Warning safety mark, symbol B.3.1 (exclamation mark) warns

the operator of danger risk.

Symbol shows the cutting blade and shoe, which express:

WARNING, DANGER OF FOOT INJURY BY ROTATING

CUTTING BLADE“.

Written information of instructions for machine operation.

5. Decal no. 7.25 according to ČSN ISO 6405-1

(symbol marks two lifting points = points that can be used for

hoisting the machine).

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6. Decal informing, that the machine can´t be moved over the site

with running cutting blade (when the cutting blade is not in

operation)

7. Decal informing about fuel type

8. Decal BLACK ARROW

(decal marks the rotation direction of the cutting blade)

9. Decal WHITE ARROW

(decal marks the grade of cutting blade setting towards the cut

material on the depth scale)

10. Decal showing the depth scale

11. Decal showing the noise emission value, which was measured

by test according to conditions of NV no. 9/2002 Sb. in the

machine (models – see point 2.1)

The value is only informative, it varies according to machine

model.

1.9. Packing material handling

Company NTC STAVEBNÍ TECHNIKA spol. s r.o. is registered by company EKO-KOM a.s.

Agreement about the repurchase of all kinds of packing materials “Agreement of associated fulfillment”

is concluded with company EKO-KOM a.s., by company NTC STAVEBNÍ TECHNIKA spol. s r.o. or

suppliers of packing materials.

2. TECHNICAL DESCRIPTION

The asphalt and concrete cutters RZ are

intended for cutting of asphalt and concrete

floors or road layers when repairing roads,

industrial areas, etc.

The machine is based on a rigid frame with

fixed spindle; the cutting disc is lowered to the

cut together with the whole frame. Lowering

and rising of the cutting disc is controlled by

means of a arrested handle that enables fine

regulation of cutting depth.

The machine is intended for wet cutting and

therefore it is equipped with a sprinkling

system. Water for sprinkling can be brought

either from machines-mounted water tank of

from external source.

The machines can be used also for dry cutting,

assuming a suitable cutting disc is used. This

method however causes high generation of dust

and thus breathing protection would be required.

The machine is driven by a single-cylinder,

four-stroke gasoline engine HONDA.

Travel is manual; the operator pushes the

machines by height-adjustable handle.

Floor saws RZ are equipped with a reference

depth scale.

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2.1. Basic Technical Data: RZ 122 RZ 172 RZ 202

Cutting depth (mm) 120 170 200

Cutting disc fastening at right at right at right

Max. disc dia (mm) 350 (400) 450 520

Travel manual manual manual

Cutting depth adjust. mechanical, adjustable

Fastening hole dia (mm) 25,4 25,4 25,4

Spindle speed (RPM) 3400 2800 2500

Water tank capacity (ltr) 33 33 33

Weight (waterless) (kg) 103 113 116

Dimensions L x W x H (mm) 1120x550x1060 1120x550x1060 1120x550x1060

Engine HONDA GX270 HONDA GX390 HONDA GX 390

Max. power (kW) 6,3 8,7 8,7

Max. speed (RPM) 3600 3600 3600

Oil sensor yes yes yes

Fuel consumption (ltr/hr) 1,5 2,2 2,2

-Engine output is mentioned according SAE J1349

Actual output of the engine installed in the machine can be different with regard to various factors,

such as operation speed of the engine, operation conditions, maintenance and other factors.

Engine operation speed is not identical with engine rated speed and this is set according to

technical parameters of the machine.

2.2. Lubricants

For use in both engine and the vibrator use high-quality engine oils of the following specifications:

15W-40 API SJ/CF

- engine oil HONDA GX270 approx. 1,1 ltr

HONDA GX390 approx. 1,1 ltr

Alternatively also other brand quality oils of viscosity class SAE 15W-40 and output classification API

SG/CF 4, API SG/CE can be used.

2.3. Identification

For communication with the manufacturer (i.e.

for warranty claims, service requests, spare parts

ordering) always report exact model and serial

number of your machine.

These data are stamped on the machine decal.

Fig. Machine decal

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2.4. Engine Identification

In case of problems related to the engine report

also engine type and serial number. This number

is stamped on the engine block (HONDA) If you

have doubts, contact the manufacturer.

In case of warranty claims, contact your local

Honda distributor.

Fir. Location of the S/N on engine HONDA

3. PRIOR TO STARTING

- Check whether the engine leaking (leaks) oil. In case of defect, contact an authorized service

center or manufacturer.

- Bolted connections for loop control of depth of cut and the matrix arm guidance (SS 120, 170) are

glued. Screws at the pulleys, the drive chassis are tight and prescribed the query moment. We

therefore recommend against any potential activity associated with permitting and tightening of

joints, and contact information to an authorized service center or manufacturer.

3.1. Check - Oil Level

It is highly recommended to check regularly the

engine oil level even at machines equipped with

the oil sensor.

In case of a machine without the oil sensor,

daily check is a must.

NOTE :

Operation with insufficient oil level may cause

serious damage to the engine.

Check the engine oil level daily!

Oil level check:

Place the machine in horizontal position.

Unsrew the plug from the check / filling hole on

the engine. If the oil level is correct, the oil

flows out slightly.

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3.2. Visual Inspection of the Machine

Check regularly the machine for:

•missing parts

•released bolts and screws

•oil or fuel leakage

•free motion of the cutting disc spindle

Pay special attention to safety devices (covers)

and controls.

3.3. Adding Fuel

1. Gasoline engines:

Use unleaded or leaded gasoline for motor

vehicles, with octane number 91 or more.

Top up fuel as necessary.

Never use dirty fuel or mixture with oil.

Avoid water and dust from entering the fuel

tank.

3.4. Check - Air Filter

Check the air filter for cleanness on a daily

basis. Clean or replace the filter if dirty.

Never run the machine with air filter missing or

damaged. Dust and dirt which get into the

engine would cause rapid wear.

Fig. Air filter - HONDA

3.5 Tipping machine

Tipping machine when the machine tipped over may break of oil into the carburetor, or the plunger.

Therefore, we recommend to inform the authorized service center, or the manufacturer about how to

proceed.

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4. OPERATION

4.1. Starting

4.1.1. Gasoline Engines HONDA

1. Turn the fuel tap into the ON position.

2. Turn on the electric switch of ignition.

3. Engage the choke („CHOKE“). Do not use it

at warm engine or at high ambient

temperature.

4. Adjust the throttle control lever to idle

(turtle image)

5. Pull out the starter grip slowly till some

resistance is felt, then pull vehemently. Do

not release the grip, but return it slowly into

the original position.

6. Let the engine to warm up, then disengage

the choke.

7. Let the engine to run at idle for a while

before loading.

8. For cutting, shift the throttle control lever to

fully open position.

DANGER!

The spindle and the cutting disc begins to

rotate immediately. Be sure that the

revolving disc would not cause any danger

for the bystanders. Have the disc cover closed

before starting.

By operating HONDA engines obey the

instructions of the HONDA engine manual.

4.2. Operation

4.2.1. Selection of the Cutting Disc

For safe and efficient operation, right selection

of the cutting disc is highly important. Choose a

high-quality diamond cutting disc and

appropriate type depending on the material to be

cut (asphalt, concrete).

Cutting discs of most suppliers are divided in

quality categories (standard/profi etc.),

sometimes also according to length and height

of the diamond segments, spacing, etc.

Cutting disc diameter is to be selected according

to the type of the machine; if possible, choose

always the maximal allowed diameter (RZ 122

350 mm, RZ 172 450 mm, RZ 202 520 mm).

The spindle speed is adjusted for this size to

keep optimal circumferential cutting speed of

the disc.

Asphalt and concrete cutters Operation manual

page 16 issued 01/2017

4.2.2. Fastening of the Cutting Disc

1. Turn off the engine and open the disc cover.

2. Use the enclosed wrenches to hold the

spindle and unscrew the fastening nut.

NOTE: Left thread!

3. Fit the cutting disc on the spindle and secure

it.

4. Close the disc cover and secure it.

4.2.3. Cutting

1. Have the disc raised above floor. Start the

engine and set full throttle.

2. Open the water tap to engage sprinkling.

3. Move the machine to the beginning of the

cut.

4. Lower slowly the disc into the cut, till

required cutting depth is reached.

5. Sensitively push the machine forward and

follow the marked path (use the guide).

6. The machine can only cut in straight

direction. In case the direction must be

changed, raise the disc from the cut, take

new direction and lower the disc again.

7. At the end of the cut, raise the disc, set the

throttle to idle.

NOTE! The cutting disc should be sprinkled

all the time. Follow the water level in the

tank and timely add water as necessary. Dry

cutting may cause fast damage to the disc.

For optimal service life of the cutting disc, the

operator should work carefully and sensitively.

Do not force the machine!

Nevertheless, lifetime of the disc may vary

depending on the material to be cut and other

factors.

4.2.4. Cutting Depth Scale

Cutters RZ 122, RZ 172, RZ 202 have the

cutting depth scale. Use the scale as follows:

1. Lower the disc just to touch the ground. In

this position, adjust the "zero" using the

wing nuts below the scale.

2. Alternatively you can just remember the

value on the scale and then add or subtract

required cutting depth as necessary.

The cutting depth is to be set up as follows:

Turn the handle by 1 revolution = disc

rising/lowering by 15 mm.

4.3. Engine Turning-Off

1. Shift the throttle control lever to idle

position (see point 4.1.1.4)

2. Let the engine to idle for a while to cool

down.

3. Turn the ignition switch to "OFF" (see

point 4.1.1.2).

4. Close the fuel tap (see point 4.1.1.1).

Asphalt and concrete cutters Operation manual

page 17

issued 01/2017

4.4. Handling, Transport, Storing

When handling the machine keep safety

regulation shown in this manual and well as general safety rules valid for operation of lifting

or hoisting equipment.

4.4.1. Manual Handling

For manual lifting, cooperation of mode people

is required. Hold the machine by frame or the

base plate. Never lift the machine by engine.

4.4.2. Handling by Crane

Use a crane of sufficient payload (see Technical

Data). Observe the regulations valid for

operation of cranes. Only qualified personnel

may carry out this work.

Fasten the lifting cable to the marked point at

the machine.

4.4.3. Handling by Forklift

Should be the machine extensively handled by a

forklift (as when sending it by a parcel service),

it is recommended to palletize it. For one

machine one small pallet (0,6x0,8 m) can be

used, for two machines use standard EUR pallet

(1,2x0,8m).

4.4.4. Transport

Secure the machine against rolling over, falling

down or sliding on the carrier. Fasten the

binding means to suitable points at the frame.

NOTE:

The machine must be kept in upright position. In

case of tipping the machine, see point 3.5.

4.4.5. Storing

Store the machine on a safe place, secured from

theft and misuse. We recommend an indoor dry

place, without excessive concentration of

chemical agents and dust.

Prior to long-term storing clean the machine,

repair the paint and apply suitable preservation

agents. Mark visibly that the machine has been

conservated.

4.5. Special Conditions of Operation

4.5.1. Work at Low Temperatures

The cutter is able to work even at low

temperatures. Let the engine to warm up

sufficiently before commencing the work.

In case that the machine is difficult to start, let it

warm up at room temperature first.

4.5.2. Work at High Altitudes

With rising altitude the engine power decreases

due to changed air/fuel ratio. The engine power

can be partially improved by changing of the

main nozzle and different adjustment of the

carburetor (gasoline engines) or different

adjustment by the injector (diesel engines).

In case that the engine should work long-term

above 1500 m above seal level, we recommend

to contact a nearest authorized service for the

respective engine.

In case that you plan this kind of operation

already when purchasing a new machine, notify

the manufacturer.

4.5.3. Work in Dusty Environment

In case of dusty environment shorten the

cleaning/replacement intervals of the air filter to

half. Clean the machine from dust regularly.

Asphalt and concrete cutters Operation manual

page 18

issued 01/2017

5. MAINTENANCE

The basic activities of maintenance, which are described in this Manual can be carried out by the

designated operator.

Repairs and adjustments beyond the extent of this Manual should be committed to an authorized service.

Bolted connections to the loop control of depth of cut and the nut of guide arm are glued. Bolts by

a pulley, the drive chassis are torque tightened. We therefore recommend against any potential

activity associated with permitting and tightening of joints, and contact information to an

authorized service center or manufacturer.

5.1. Maintenance of the Engine

- see enclosed Engine Operation Manual

5.2. Tensioning of the Drive Belts

check regularly tensioning of the drive belts that

drive the cutting disc. Deflection of the belts

under finger pressure should be about 5mm. To

tension the belts, proceed as follows:

•loosen 4 bolts which fasten the engine to

the base plate

•turn the tensioning screw to tension the

belts

•re-tighten the fastening bolts

When replacing the belts, use all belts of the

same type and dimension.

NOTE! Do not over-tension the belts!

5.3. Inspection of Bolted Connections

It is recommended to inspect the bolted

connections daily before work.

5.4. Adjustment of Engine Speed

In case of engine replacement or repair it is necessary to adjust engine speed. Speed is measured by a

digital tachometer.

Therefore, the speed setting is entrust a qualified serviceman.

Asphalt and concrete cutters Operation manual

page 19 issued 01/2017

6. MAINTENANCE SCHEDULE

This maintenance schedule contains only the most important operations. Besides of these operations, carry out maintenance and repairs of the machine

as necessary depending on the respective conditions of operation. Check also the engine operation manual.

WARNING:

Turn off the engine before any maintenance or repair activity.

Use genuine spare parts only. Use of non-original spare parts may lead to damage to the machine. The manufacturer will not honor any

warranty claim arising from such reason.

Item Operation Initial inspection After 1st month or 20

hrs. Every 3 months or 50

hrs. Every 6 months or

100 hrs.

Engine oil Inspection of oil level DAILY

Exchange  

Air filter Inspection

Cleaning



(1)

Spark plug (gasoline

engines) Inspection - cleaning 

Filter bowl Cleaning 

Fuel hose Inspection - Exchange Every two years

Valve clearance Inspection - adjustment Every 12 months or 250 hrs. (2)

Fuel tank and sieve Cleaning Every 12 months or 300 hrs. (2)

Drive belt Tensioning 

1. To be carried more often when operating in dusty environment!!!

2. Such maintenance should be performed by service technicians NTC, respectively. authorized service according to engine type, especially

if the user does not have the proper tools and knowledge about these devices.

Asphalt and concrete cutters Operation manual

Page 20 issued 01/2017

7. WARRANTY CONDITIONS

Construction machines manufactured by NTC are designed and manufactured to suit longterm operation by most difficult conditions. Based on our

experience we can say that these machines do work reliably not during the warranty period but also long time after the warranty expires.

If it happens that the machine does not work to your satisfaction, we are always here to help. In case of any failure please proceed as following:

1. Check if the failure isn´t caused by breaking operation manual or if it isn´t caused by a basic cause (not enough fuel in the tank, low level of

engine oil, dirty air filter).

2. If you were unable to fix the failure, contact the manufacturer or its authorized service (see warranty protocol).

3. Mention following info there:

Company name, your name, phone and fax number

Machine type, serial number

Type of failure

If the machine is in warranty, write date of purchase and let the serviceman know it is a warranty case

4. Warranty claim needs to be done in written form, best if Warranty claim form is used.

5. Every warranty claim will be checked by authorized staff immediately and the way of repair will be suggested.

Warranty conditions are described in the agreement with particular distributor.

‚The right for warranty expires in following cases:

- Machine was not used and maintained according to operation manual or was damaged by inadequate intervention by operator or unathorised

service

- Machine was not serviced according to maintenance plan in operation manual

- Machine was used in different conditions or for different purpose than it is determined to

- Other refills or spare parts than recommended were used for repair or maintenance

- Machine had an accident or was damaged by force majeure

- Intervention to the machine construction was done without manufacturer approval

- Failures were caused by inadequate storing or manipulation

- Items of common wear such as drive belts, bowdens, filters, plastic washers, blades, etc. are excluded from warranty

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