SAINT-GOBAIN NORTON clipper C51 Series User manual

C51
OPERATING INSTRUCTIONS
Translation of the original instructions

VERS.2017.06.12 C51_MAN_EN
2

VERS.2017.06.12 C51_MAN_EN
3
The undersigned manufacturer:
SAINT - GOBAIN ABRASIVES S.A.
190, BD. J. F. KENNEDY
L-4930 BASCHARAGE
Declares that this product:
« Floor saw »: C 51 P6.5 HONDA Code : 70184683534
is in conformity with the following Directives :
"MACHINES" 2006/42/CE
"ELECTROMAGNETIC COMPATIBILITY" 2004/108/CE
"NOISE" 2000/14/CE
And the European standard:
EN 13862 –Floor cutting-off machines –Safety
Valid for machines as of serial number:
70100000
Storage site for the technical documents:
Saint-Gobain Abrasives 190, Bd. J. F. Kennedy 4930 BASCHARAGE, LUXEMBOURG
This declaration of conformity loses its validity when the product is converted or modified without
agreement.
Bascharage, Luxembourg, 01/02/2012.
Olivier Plenert, executive officer.
Declaration of conformity

VERS.2017.06.12 C51_MAN_EN
4
C51
OPERATING INSTRUCTIONS
1BASIC SAFETY INSTRUCTIONS 6
1.1 Symbols 6
1.2 Machine plate 7
1.3 Safety instructions for particular operating phases 8
2GENERAL DESCRIPTION OF THE C51 9
2.1 Short description 9
2.2 Layout 9
2.3 Technical data 11
2.4 Statement regarding the vibration emission 12
2.5 Statement regarding noise emission 13
3ASSEMBLY AND COMMISSIONING 14
3.1 Assembly 14
3.2 Tool assembly 14
3.3 Water cooling system 14
3.4 Starting the machine 15
4TRANSPORT AND STORING 16
4.1 Securing for transport 16
4.2 Transport procedure 16
4.3 Long period of inactivity 16
5OPERATING THE C51 17
5.1 Site of work 17
5.2 Cutting method 17
6MAINTENANCE AND SERVICE 19
6.1 Maintenance of the machine 19
6.2 Maintenance of the engine 20
7FAULTS: CAUSES AND CURES 23
7.1 Fault-finding procedures 23
7.2 Trouble-shooting guide 23
7.3 Customer service 24

VERS.2017.06.12 C51_MAN_EN
5

VERS.2017.06.12 C51_MAN_EN
6
1 BASIC SAFETY INSTRUCTIONS
The C51 is exclusively designed for the cutting of floors made of asphalt, green and cured
concrete (reinforced or not) as well as of industrial cement.
Uses other than the manufacturer's instructions shall be considered as contravening the
regulations. The manufacturer shall not be held responsible for any resulting damage. Any risk
shall be borne entirely by the user. Observing the operating instructions and compliance with
inspection and servicing requirements shall also be considered as included under use in
accordance with the regulations.
1.1 Symbols
Important warnings and pieces of advice are indicated on the machine using symbols. The
following symbols are used on the machine:
Read operator’s instructions
Ear protection must be worn
Hand protection must be worn
Eye protection shall be worn
Cutting depth indicator
Danger: risk of cut

VERS.2017.06.12 C51_MAN_EN
7
Rotation of the wheel in the indicated
direction lowers the blade
Rotation of the wheel in the indicated
direction raises the blade
Never move the machine with the blade
running idle.
Rotation direction of the blade
Emergency Stop
1.2 Machine plate
Important data can be found on the following plate located on the machine:
Machine Model
Machine Code
Weight
Year of production
Maximum blade diameter
Machine type
Serial number
Power
Safety standard
Blade speed
Bore
diameter

VERS.2017.06.12 C51_MAN_EN
8
1.3 Safety instructions for particular operating phases
Before commencing work
Before commencing work, make yourself familiar with the working environment at the place
of use. The working environment includes: obstacles in the area of work and manoeuvre,
the firmness of the floor, necessary protection at the site relating to public thoroughfares and
the availability of help in the event of accidents.
Check for correct mounting of the blade regularly.
Immediately remove damaged or badly worn blades, as they endanger the operator whilst
rotating.
Only fit NORTON diamond blades to the machine! The use of other tools can damage the
machine!
Attention is drawn to the use of BS2092 safety goggles in conformity with specified
Processes No.8 of the Protection of Eyes Regulation 1974, Regulation 2(2) Part 1.
For security reasons, never leave the machine unattended, untied or unlocked.
While the engine is running
Do not move the machine whilst the blade is running idle.
Always cut with the blade guard in position.
Apply cooling water continuously whilst cutting and in good time!
Petrol powered machines:
Always use the fuel advised.
In confined areas, exhaust gases should be evacuated and the job site properly aerated.
Petrol and diesel machines, which by their nature emit toxic exhaust gases, must not be
used in places prohibited by the Health at Work etc. Act 1974 or which are prohibited by
Factory Inspectors or Safety Officers.
Fuel is flammable. Before filling the tank, shut down the engine, extinguish all open flames
and do not smoke. Take care that no petrol is spilled on any motor part. Always wipe up
spilled fuel.

VERS.2017.06.12 C51_MAN_EN
9
2 GENERAL DESCRIPTION OF THE C51
Any modification, which could lead to a change in the original characteristics of the machine,
may be done only by Saint-Gobain Abrasives S.A. who shall confirm that the machine is still in
conformity with the safety regulations. Saint-Gobain Abrasives S.A. keeps the right of making
technical or design modification without prior notification.
2.1 Short description
The Floor Saw C51 you have chosen,is used for small repair works in concrete and asphalt,
for cutting induction loops and installing cables as well as for cutting expansion joints. It can be
used for either wet or dry cutting operations.
Being of small construction, it can be transported in a car or van, the handle can be removed,
reversed or retracted. The water container is also removable.
All component parts on the C51 are assembled to a high quality standard, ensuring long life,
reliability and a minimum of maintenance.
Special types of blades are available for asphalt, green concrete, cured concrete (reinforced or
not) as well as for industrial cement flooring.
2.2 Layout

VERS.2017.06.12 C51_MAN_EN
10
Made of jig welded open profile steel, the C51 is stable but at the same time, easily
transportable.
The one-piece blade guard (1) fully protects the operator and his working environment. It is
firmly fixed to the main frame. A handle on the top of the blade guard facilitates its removal
when changing blades.
A manually operated hand wheel mechanism (2) enables graduated depth setting. Turning the
hand wheel clock- or anti-clockwise will raise or lower the cutting blade.
The handle (3) is detachable or can be reversed for easy transportation. The height is
adjustable.
The motor frame (4), supporting the blade shaft, the motor, the blade guard and the belt guard,
is articulated on the rear axle.
The precisely manufactured blade shaft is fitted into two heavy-duty self-aligning pillow block
bearings, including grease nipples. The shaft is 30mm in diameter. A three-belt taper lock pulley
is fitted on one end. The shaft is reduced to 25,4mm at the other end, allowing an inner flange
complete with dowel pinholes to be fixed.
The steel belt guard (5) is a sealed two piece unit. The backing plate is bolted to the mainframe
of the machine and two locking nuts are welded to it. The outer guard, covering the three drive
belts and taper lock pulleys, is held in place by two locking bolts.
The pointer (6) allows the operator to make precise cut easily.
The water tank (7), with a capacity of 20 litres, can be easily removed from the machine,
allowing the tank to be refilled without having to move the machine.
The machine has a GX200 Honda engine (9), with 6,5HP. An emergency shut down switch (8)
near the levers allows an immediate stop of the machine in case of danger.

VERS.2017.06.12 C51_MAN_EN
11
2.3 Technical data
Engine
Honda GX200, 4 strokes, 1 cylinder, 6,5HP (4,8kW)
Filter
Dual Filter
Fuel
Regular unleaded
Oil
Honda 4-Stroke, or equivalent high detergent, premium quality motor
oil certified to meet or exceed U.S. automobile manufacturer’s
requirement for service classification SG, SF. (SG, SF designated on
the oil container).
SAE 10W-30 recommended
Starter
Manual pull chord
Max. blade diameter
350 mm
Bore
25,4 mm
Max. cutting depth mm
125 mm
Flange diameter
95 mm
Blade shaft speed
2800 min-1
Driving belts
3
Water tank
20 l
Machine dimensions
780x460x890 mm with tank
780x460x745 mm without tank
Weight
76 kg
Max. operating weight
101 kg
Sound pressure level
84 dB (A) (ISO EN 11201)
Sound energy level
100 dB (A) (ISO EN 3744)

VERS.2017.06.12 C51_MAN_EN
12
2.4 Statement regarding the vibration emission
Declared value of vibration emission following EN 12096.
Machine
Model / code
Measured value of vibration
emission at m/s2
Uncertainty K
m/s2
Tool used
Model / code
C 51 P6.5
HONDA
70184683534
6.02
0.9
Duo Extrême
Values determined using the procedure described in the standard EN 13862.
The measurements are made with new machines. Actual values may vary with site
conditions, in terms of:
Materials worked
Wear Machine
Lack of maintenance
Inappropriate tool for application
Tool in poor condition
Unskilled operator
Etc…
The exposure time to vibration is based on the performance of work (related to the
adequacy Machine / Tool / worked material / operator)
When evaluating risks due to hand-arm vibration, you need to take into account effective
usage at rated power of machine during a full day of work; quite often you will realise that
effective utilisation time represents around 50% of overall duration of work. You have to
consider, of course, breaks, water feeding, preparation of work, time to move the machine,
disk mounting…

VERS.2017.06.12 C51_MAN_EN
13
2.5 Statement regarding noise emission
Declared value of noise emission following EN ISO 11201 and NF EN ISO 3744.
Machine
Model / code
Sound
Pressure level
LPeq
EN ISO 11201
Uncertainty K
(Sound
Pressure level
LPeq
EN ISO 11201)
Sound power
level
LWeq
NF EN ISO 3744
Uncertainty K
(Sound power level
LWeq
NF EN ISO 3744)
C 51 P6.5
HONDA
70184683534
84 dB(A)
2.5 dB(A)
100 dB(A)
4 dB(A)
Values determined using the procedure described in the standard EN 13862.
The measurements are made with new machines. Actual values may vary with site
conditions, in terms of:
Wear Machine
Lack of maintenance
Inappropriate tool for application
Tool in poor condition
Unskilled operator
Etc…
Measured values relate to an operator in normal use, as described in the manual position.

VERS.2017.06.12 C51_MAN_EN
14
3 ASSEMBLY AND COMMISSIONING
Before beginning the work with the C51, you have to assemble some parts.
3.1 Assembly
Secure the operator’s handle in a comfortable user position by using the locking nut.
3.2 Tool assembly
Only use NORTON blades with the C51.
A blade with a maximum diameter of 350 mm can be fitted in the C51.
All tools used must be selected with regard to their maximum permitted cutting speed for the
machine’s maximum permitted rotation speed.
Before mounting a new blade, switch the machine off.
To mount a new blade, follow these steps:
Turn the wheel until the cutting head is in the raised position.
Disconnect the water tank.
Loosen the side screw and remove the blade guard.
Loosen the hexagonal nut on the blade shaft, which holds the removable outer flange.
Remove the outer flange.
Clean the flanges and blade shaft and inspect for wear.
Mount the blade on the shaft ensuring that direction of rotation is correct. Wrong direction of
rotation blunts the blade quickly.
Replace outer blade flange.
Tighten hexagonal nut with spanner supplied for this purpose.
Remount the blade guard.
The blade bore must correspond exactly to the blade shaft. Cracked or damaged bore is
dangerous for the operator and for the machine.
3.3 Water cooling system
Fill the water tank with clean water.
Open water-tap at blade guard (note that handle on water-tap should be in line with water-flow).
Ensure that water is flowing freely in the circuit and delivered adequately to both sides of the
blade, as insufficient water supply may result in premature failure of the diamond blade.
In case of frost, empty the water cooling system.

VERS.2017.06.12 C51_MAN_EN
15
3.4 Starting the machine
Make sure the blade is raised clear up the ground before starting the machine.
Turn the fuel valve to the ON position.
Move the choke lever to the CLOSED position.
NOTE: do not use the choke if the engine is
warm or the air temperature is high.
Move the throttle control lever slightly to the
left.
Put the engine switch on ON, and make sure
the emergency switch on the board of the
machine is in the correct position.
Pull the starter grip lightly until you feel
resistance, then pull briskly.
CAUTION: Do not allow the starter grip to snap
back against the engine. Return it gently to
prevent damage to the starter.
As the engine warms up, gradually move the
choke lever to the OPEN position.
Position the throttle control lever for the
maximum engine speed.
To stop the engine, move the throttle control lever fully to the right, then turn the engine switch
to the OFF position. Turn the fuel valve to the OFF position.

VERS.2017.06.12 C51_MAN_EN
16
4 TRANSPORT AND STORING
Take the following measures in order to transport and store the C51 securely.
4.1 Securing for transport
Before transporting the machine:
Remove the blade.
Empty the water tank.
Lower the handle in its fixing tube and secure it using the locking nut.
Raise the guide-a-cut in its upright position.
Raise the cutting head to its highest position using the handwheel.
4.2 Transport procedure
The machine can be moved on a flat surface using its wheels. Do not lift this machine using a
crane as no part of the machine is designed to hold up the C51’s weight.
4.3 Long period of inactivity
If the machine is not going to be used for a long period, please take the following measures:
Completely clean the machine.
Loosen the drive belts.
Grease the threaded shaft.
Possibly change the motor oil.
Empty the water system.
The storage site must be clean, dry and at a constant temperature.

VERS.2017.06.12 C51_MAN_EN
17
5 OPERATING THE C51
5.1 Site of work
Before you start working, please check the following points:
Remove from the site anything, which might hinder the working procedure.
Make sure the site is sufficiently well lit.
Make sure you have a continual adequate view of the working area so you can intervene in
the working process at any time.
Keep other staff out of the area, so you can work securely.
5.2 Cutting method
In this section, you can find instructions to make a straight cut at the desired depth.
5.2.1 Preparing your cut
Before starting the machine,
Draw a line on the floor over the cutting length.
Make sure you have filled the engine tank with fuel, and the water tank with water. No petrol
is supplied with the machine.
The engine is shipped with oil. Check oil level before starting. Top up if required.
Make sure you have mounted the correct blade as recommended by the manufacturer
depending on the material to be worked, the working procedure (dry or wet cut) to be carried
out, and the efficiency required.
Make sure that the flanges securely hold the diamond blade.
Make sure that the blade is not touching the floor before starting.
Bring the handle in a comfortable position.
Roll the machine until the blade is over the line.
Lower the guide-a-cut so it touches the line.
5.2.2 Cutting the floor
You can now start the engine.
To make your cut,
Turn the depth hand wheel until the blade slightly touches the floor.
Open water valve to control the amount of water required for the type of blade, using 15 to
25l/min for wet and 1-2l/min for dry cutting, dust control. Check for minimum water level
regularly.
To lower blade into the cut, turn hand wheel anti-clockwise. Each turn of the hand wheel will
raise or lower the blade by 7.5mm.
Once the required depth of cut is reached, you can avoid the screw spindle to move with the
vibrations of the machine by tightening the knob on the side of the machine (see 1 on the
following picture).

VERS.2017.06.12 C51_MAN_EN
18
push the machine forward with steady and gentle pressure and follow the line with the
pointer. The feed speed must be adjusted depending on the material being cut, and depth of
cut.
At the finish of the cut, raise the blade out of the cut by turning the hand wheel clockwise,
shut-off the water and switch off the engine.

VERS.2017.06.12 C51_MAN_EN
19
6 MAINTENANCE AND SERVICE
ATTENTION : to perform maintenance on the machine, always switch it off. Always wear a face
mask and safety goggles while performing the maintenance of machine.
6.1 Maintenance of the machine
To ensure a long-term quality from the cutting with the C51, please follow the maintenance plan
below:
Regular service period
Perform at every
indicated period

After one hour of work
Begin of the day
During the changing of the tool
End of the day
Every week
After a fault
After a damage
Whole machine
Visual control (general
aspect, watertightness)
Clean
Flange and blade fixing devices
Clean
Belts tension
Control
Water hoses and nozzles
Clean
Depth screw
Grease
Engine housing
Clean
Reachable nuts and screws
Tighten up
Adjustment and replacement of the belts
After one hour of work, the belts heat and stretch. Therefore, you have to re-tension them.
To adjust the belts, firstly remove the belt guard by unscrewing the 2 nuts. Loose the 4 engine
bolts and shift the engine by using the two screws on the front.
To replace the belts, move the engine completely to the front. Adjust the belts and retighten
them by shifting the motor to the rear.
Always use a matched set of belts. Do not replace single belts.
Lubrication
The C51 uses life-lubricated bearings. Therefore, you don’t need to lubricate them at all.
Grease the depth screw every day.
Cleaning of the machine
Your machine will last longer if you clean it thoroughly after each day of work.

VERS.2017.06.12 C51_MAN_EN
20
6.2 Maintenance of the engine
Regular service period
Perform at every indicated month or
operating hour interval, whichever comes
first

Each use
First month or 20 hours
Every 3 months or 50 hours
Every 6 months or 100 hours
Engine oil
Check level
Change
Air cleaner filter
Check
Clean
Fuel strainer cup
Clean
Spark plug
Check-Clean
Fuel line
Check (Replace if necessary)
Every 2 years
Engine oil
To change the oil,
Remove the oil filler cap/dipstick and
drain bolt.
Allow the oil to drain completely.
Dispose of used motor oil in a manner
that is compatible with the
environment. We suggest you to take
used oil in a sealed container to your
local recycling centre or service station
for reclamation. Do not throw it in the
trash, pour it on the ground or down in
a drain.
Reinstall the drain bolt, and tighten it
to 18 N.m.
Fill the crankcase with the engine oil to
the outer edge of the oil filler neck.
Reinstall the filler cap/dipstick.