Hilti DSH 700-X User manual

DSH 700 /
DSH 900
Operating instructions en
Brugsanvisning da
Bruksanvisning sv
Bruksanvisning no
Käyttöohje fi
Instrukcja obsługi pl
Инструкция по зксплуатации ru
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

19
2
"≠
+# +] +[
"Ç
+|
5 +}
+≠ 7 6
+±
4 +{ "#
+“ "“
"[
+Ç
3 "±
8
1
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

ꨍ
ꨏ
ꨔ
ꨑ
ꨎ
ꨐ
ꨕ
ꨒ
ꨓ
2
1/8
1/8
4
2/7/9
3
3
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

1/15
14
2/4
5/13
4
6
3/10
8
7
9
11
4
1
2
5
1
5
7
3
2/4
3
6
6
6
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

2
5
6
3
4
8
9/10
8
7
3
/
4
3/4
3/4
3/4
11
1/5
1/5
2
10
8 9
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

1/3
1/3
1/3
15
1
3/8
6
5
2/6
4/7
16
15
4
5
0.5mm
2/8
14
6
7
5
1
/
12
2
10
8
4
4
3
12
2
3
13
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

17
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

ORIGINAL OPERATING INSTRUCTIONS
DSH 700/ DSH 900 cut-off saw
It is essential that the operating instruc-
tions are read before the machine is oper-
ated for the first time.
Always keep these operating instructions
together with the machine.
Ensure that the operating instructions are
with the machine when it is given to other
persons.
Contents Page
1. General information 2
2. Description 3
3. Accessories 4
4. Technical data 5
5. Safety instructions 7
6. Before use 10
7. Operation 14
8. Care and maintenance 15
9. Troubleshooting 19
10. Disposal 21
11. Manufacturer’s warranty 21
12. EC declaration of conformity 22
1These numbers refer to the corresponding illustra-
tions. The illustrations can be found on the fold-out
cover pages. Keep these pages open while studying
the operating instructions.
In these operating instructions, the designation “the
machine” always refers to the DSH 700 or DSH 900
hand-held gas saw.
Parts, operating controls and indicators (DSH 700 /
DSH 900) 1
@Forward grip
;Rear grip
=Guide wheels
%Start/stop switch
&Choke lever / half-throttle lock
(Throttle safety grip
)Throttle trigger
+Decompression valve
§Fuel pump
/Starter handle
:Cutting disc
·Clamping screw
$Hole for locking pin for changing cutting discs
£Clamping flange
|Guard (hood)
¡Disc guard adjustment grip
QWater valve
WWater connection
EFuel tank cap
RAir filter cover
TBelt tensioner
ZExhaust / muffler
USpark filter
ISpark plug connector
OType identification plate
DSH-FSC saw carriage 2
@Grip
;Throttle trigger
=Cutting depth adjustment
%Hold-down device
&Water tank
(Water connection
)Axial adjustment
+Throttle cable
§Machine cradle
en
1
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

5100 rpm
max.
1. General information
1.1 Safety notices and their meaning
DANGER
Draws attention to imminent danger that will lead to
serious bodily injury or fatality.
WARNING
Draws attention to a potentially dangerous situation
that could lead to serious personal injury or fatality.
CAUTION
Draws attention to a potentially dangerous situation
that could lead to slight personal injury or damage to
the equipment or other property.
NOTE
Draws attention to an instruction or other useful
information.
1.2 Explanation of the pictograms and other
information
Prohibition signs
Transport by
crane is not
permissible.
Warning signs
General
warning Warning: hot surface Warning: Flying sparks
present a fire
risk.
Warning: Risk
of kickback.
Warning: Don’t
inhale toxic
vapors or
exhaust
fumes.
Minimum
permissible
speed rating of
the cutting
discs used
Obligation signs
Wear
protective
gloves.
Wear safety
shoes. Wear ear protection, eye
protection,
respiratory
protection and
a hard hat.
Don’t use
toothed
cutting discs.
Don’t use
damaged
cutting discs.
Smoking and
naked flames
prohibited.
Symbols
Read the
operating
instructions
before use.
Motor stop
system Fuel pump
Location of identification data on the machine
The type designation and serial number can be found
on the type identification plate on the machine. Make
a note of this data in your operating instructions and
always refer to it when making an enquiry to your
Hilti representative or service department.
Type:
Generation: 01
Serial no.:
en
2
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

2. Description
2.1 Use of the product as directed
The machine is intended for hand-held or walk-behind
use for dry or wet cutting of asphalt and mineral
or metallic construction materials using abrasive or
diamond cutting discs.
To reduce the amount of dust produced when cutting,
we recommend use of the wet cutting method.
The working environment may be as follows: con-
struction site, workshop, renovation, conversion or
new construction.
To avoid the risk of injury, use only genuine Hilti
accessories and cutting tools.
Observe the safety rules and operating instructions
for the accessories used.
Working on materials hazardous to the health (e.g.
asbestos) is not permissible.
Observe the information printed in the operating in-
structions concerning operation, care and mainten-
ance.
Nationally applicable industrial safety regulations
must be observed.
The machine is designed for professional use and
may be operated, serviced and maintained only by
trained, authorized personnel. This personnel must
be informed of any special hazards that may be en-
countered. The machine and its ancillary equipment
may present hazards when used incorrectly by un-
trained personnel or when used not as directed.
Take the influences of the surrounding area into
account. Do not use the power tool or appliance
where there is a risk of fire or explosion.
Modification of the machine or tampering with its
parts is not permissible.
Don’t work in closed, poorly ventilated rooms.
2.2 Items supplied as standard
1 Machine
1 DSH tool set
1 Operating instructions
1 DSH consumables kit
2.3 Abrasive cutting discs for hand-guided
gasoline-powered cut-off saws
Abrasive cutting discs for gasoline-powered cut-off
saws are composed of synthetic resin-bonded ab-
rasive granulate. These cutting discs feature fabric
or fiber reinforcement which improves their strength,
toughness and breakage resistance.
NOTE
Abrasive cutting discs for gasoline-powered cut-off
saws are used mainly for cutting ferrous and non-
ferrous metals.
NOTE
Various grit types such as aluminum oxide, silicon
carbide, zirconium, etc., with a different bonding
material (matrix) or matrix hardness, are available
depending on the construction material to be cut.
2.4 Diamond cutting discs for hand-guided
gasoline-powered cut-off saws
Diamond cutting discs for gasoline-powered cut-off
saws consist of a steel core (disc) with diamond
segments (metallically bonded industrial diamonds).
NOTE
Segmented diamond cutting discs or those with a
continuous cutting face are mainly used for cutting
asphalt and mineral construction materials.
2.5 Cutting disc specifications
Diamond cutting discs in compliance with the require-
ments of EN 13236 are to be used with the machine.
Synthetic resin-bonded fiber-reinforced cutting discs
in compliance with EN 12413 (straight, not offset,
type 41) may also be used with this machine for
working on metals. The mounting instructions and
instructions for use issued by the disc manufacturer
must also be observed.
2.6 Recommendations for use
We recommend that the workpiece is not cut through
in a single operation. Advance to the required depth
of cut by making several to-and-fro movements.
To avoid damaging the diamond cutting disc when
dry cutting, lift the blade out of the cut for approx. 10
seconds every 30 to 60 seconds while the machine is
still running.
To reduce the amount of dust produced when cutting,
we recommend use of the wet cutting method.
en
3
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

3. Accessories
Accessories for the DSH 700 and DSH 900
Designation Short designation Item number, description
Diamond cutting disc 000000, See main catalog.
Abrasive cutting disc 000000, See main catalog.
Two-stroke oil DSH (1 L) 365827
Water supply unit DWP 10 365595
Saw carriage DSH-FSC 431364
Hard hat 267736
Protective glasses I-VO B05 PS clear 285780
Container DSH 365828
Consumables kit DSH 365602
Consumables and wearing parts for the DSH 700
Designation Short designation Item number
Air filter DSH 261990
Cord (5 pcs) DSH 412230
Starter DSH 700 359425
Drive belt DSH 12/14" 359476
Filter element DSH 412228
Spark plug DSH 412237
Tool set DSH 359648
Cylinder set DSH 700 412245
Fastening screw assy. DSH 412261
Flange (2) DSH 412257
Centering ring 20 mm / 1" DSH 412264
Consumables and wearing parts for the DSH 900
Designation Short designation Item number
Air filter DSH 261990
Cord (5 pcs) DSH 412230
Starter DSH 900 359427
Drive belt DSH 12/14" 359476
Drive belt DSH 16" 359477
Filter element DSH 412228
Spark plug DSH 412237
Tool set DSH 359648
Cylinder set DSH 900 412384
Fastening screw assy. DSH 412261
Flange (2) DSH 412257
Centering ring 20 mm / 1" DSH 412264
en
4
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

4. Technical data
Right of technical changes reserved.
NOTE
The vibration emission level given in this information sheet has been measured in accordance with a
standardised test given in EN 19432 and may be used to compare gasoline-powered cut-off saws with
each other. It may be used for a preliminary assessment of exposure. The declared vibration emission level
represents the main applications of the machine. However if the machine is used for different applications, with
different accessories or poorly maintained, the vibration emission may differ. This may significantly increase
the exposure level over the total working period. Note that excessive exposure of the hand-arm system to
vibration may cause blood circulation disorders (e.g. Raynaud’s disease). An estimation of the level of exposure
to vibration should also take into account the times when the machine is switched off or when it is running
but not actually doing the job. This may significantly reduce the exposure level over the total working period.
Identify additional safety measures to protect the operator from the effects of vibration such as: maintain the
machine and the accessories, keep the hands warm, organisation of work patterns.
Machine DSH 700 30 cm
/ 12"
DSH 700 35 cm
/ 14"
DSH 900 35 cm
/ 14"
DSH 900 40 cm
/ 16"
Motor type Two-stroke /
single-cylinder /
air-cooled
Two-stroke /
single-cylinder /
air-cooled
Two-stroke /
single-cylinder /
air-cooled
Two-stroke /
single-cylinder /
air-cooled
Cubic capacity 68.7 cmu68.7 cmu87 cmu87 cmu
Weight without
cutting disc, tank
empty
11.3 kg 11.5 kg 11.7 kg 11.9 kg
Weight with saw
carriage, without
cutting disc, tank
empty
42.3 kg 42.5 kg 42.7 kg 42.9 kg
Power rating 3.5 kW 3.5 kW 4.3 kW 4.3 kW
Maximum arbor
speed 5,100/min 5,100/min 5,100/min 4,700/min
Engine speed 10,000±200/min 10,000±200/min 10,000±200/min 10,000±200/min
No-load speed 2,500…3,000/min 2,500…3,000/min 2,500…3,000/min 2,500…3,000/min
Dimensions with
cutting disc (L x
W x H) in mm
783 X 261 X 434 808 X 261 X 434 808 X 261 X 434 856 X 261 X 466
Ignition (type) Electronically-
controlled ignition
timing
Electronically-
controlled ignition
timing
Electronically-
controlled ignition
timing
Electronically-
controlled ignition
timing
Electrode gap 0.5 mm 0.5 mm 0.5 mm 0.5 mm
Spark plug Manufacturer: NGK
Type: CMR7A-5
Manufacturer: NGK
Type: CMR7A-5
Manufacturer: NGK
Type: CMR7A-5
Manufacturer: NGK
Type: CMR7A-5
Carburetor Manufacturer:
Walbro
Model: WT
Type: 895
Manufacturer:
Walbro
Model: WT
Type: 895
Manufacturer:
Walbro
Model: WT
Type: 895
Manufacturer:
Walbro
Model: WT
Type: 895
en
5
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

Machine DSH 700 30 cm
/ 12"
DSH 700 35 cm
/ 14"
DSH 900 35 cm
/ 14"
DSH 900 40 cm
/ 16"
Fuel mixture Hilti oil 2% (50:1)
or TC oil 4%
(25:1)
Hilti oil 2% (50:1)
or TC oil 4%
(25:1)
Hilti oil 2% (50:1)
or TC oil 4%
(25:1)
Hilti oil 2% (50:1)
or TC oil 4%
(25:1)
Tank capacity 900 cmu900 cmu900 cmu900 cmu
Cutting disc mount Reversible Reversible Reversible Reversible
Disc drilling dia-
meter/arbor hold-
ing bore
20 mm or
25.4 mm
20 mm or
25.4 mm
20 mm or
25.4 mm
20 mm or
25.4 mm
Max. disc outside
diameter
308 mm 359 mm 359 mm 410 mm
Min. flange outside
diameter
102 mm 102 mm 102 mm 102 mm
Max. disc thick-
ness (steel disc
thickness)
5.5 mm 5.5 mm 5.5 mm 5.5 mm
Maximum cutting
depth 100 mm 125 mm 125 mm 150 mm
Sound pressure
level* LpA,eq
ISO 19432 (ISO
11201)
99 dB (A) 99 dB (A) 102 dB (A) 102 dB (A)
Uncertainty for
noise pressure
level LpA,eq
2.8 dB (A) 2.8 dB (A) 3.0 dB (A) 3.0 dB (A)
Measured sound
power level
2000/14/EC
(ISO 3744)
108 dB (A) 108 dB (A) 112 dB (A) 112 dB (A)
Uncertainty for
measured sound
power level
2.5 dB (A) 2.5 dB (A) 2.5 dB (A) 2.5 dB (A)
Guaranteed sound
power level LwA
2000/14/EC (ISO
3744)
111 dB (A) 111 dB (A) 115 dB (A) 115 dB (A)
Vibration value*
ahv,eq front/rear
grip ISO 19432
(EN 12096)
4.5 / 3.2 m/st4.7 / 5.0 m/st6.3 / 6.2 m/st5.2 / 4.5 m/st
Uncertainty for
vibration value
2.4 / 2.1 m/st2.2 / 2.1 m/st1.9 / 2.7 m/st2.3 / 2.1 m/st
en
6
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

Machine DSH 700 30 cm
/ 12"
DSH 700 35 cm
/ 14"
DSH 900 35 cm
/ 14"
DSH 900 40 cm
/ 16"
Comment * The sound pres-
sure level and the
vibration values
were determined
allowing for 1/7
no-load operation
and 6/7 full-load
operation.
* The sound pres-
sure level and the
vibration values
were determined
allowing for 1/7
no-load operation
and 6/7 full-load
operation.
* The sound pres-
sure level and the
vibration values
were determined
allowing for 1/7
no-load operation
and 6/7 full-load
operation.
* The sound pres-
sure level and the
vibration values
were determined
allowing for 1/7
no-load operation
and 6/7 full-load
operation.
5. Safety instructions
In addition to the information relevant to safety
given in each of the sections of these operating
instructions, the following points must be strictly
observed at all times.
5.1 General safety rules
a) Use the right tool or machine for the job. Do not
use the tool or machine for purposes for which
it was not intended. Use it only as directed and
when in faultless condition.
b) Avoid touching rotating parts. Switch the power
tool on only after bringing it into position at the
workpiece. Touching rotating parts, especially
rotating drill bits, discs or blades, etc. may lead
to injury.
c) Use only the genuine Hilti accessories or an-
cillary equipment listed in the operating in-
structions. Use of accessories or ancillary equip-
ment not listed in the operating instructions may
present a risk of personal injury.
d) Always hold the saw and the saw carriage se-
curely with both hands on the grips provided.
Keep the grips dry, clean and free from oil and
grease.
e) Cuts made in loadbearing walls of buildings or
other structures may influence the statics of the
structure, especially when steel reinforcing bars
or load-bearing components are cut through. Con-
sult the structural engineer, architect, or person
in charge of the building project before begin-
ning the work.
f) Do not overload the machine. It will work more
efficiently and more safely within its intended
performance range.
g) Never use the power tool without the guard
(hood).
h) Take steps to ensure that flying sparks from
the power tool do not present a hazard, i.e. by
striking yourself or other persons. Adjust the
position of the disc guard accordingly.
i) Adjust the position of the disc guard on the
machine correctly. The guard must be securely
attached to the machine and positioned for max-
imum safety, so the least amount of cutting disc
is exposed towards the operator. The guard
helps to protect the operator from broken disc
fragments and accidental contact with the disc.
j) Store machines in a secure place when not in
use. When not in use, machines must be stored
in a dry, high place or locked away out of reach
of children.
k) Switch the machine off before transporting it.
l) When laying the machine down, make sure that
it stands securely.
m) Switch the machine off after use.
n) Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
o) Maintain the machine carefully. Check for mis-
alignment or binding of moving parts, breakage
of parts and any other condition that may affect
the machine’s operation. If damaged, have the
machine repaired before use. Poor maintenance
is the cause of many accidents.
p) Set the switch to the “stop” position before
changing the cutting disc or adjusting the guard.
q) Don’t leave the machine unattended while the
motor is running.
r) Always apply full throttle when cutting.
s) Hold the machine by insulated gripping surfaces
when performing an operation where the cutting
en
7
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

disc may contact hidden wiring. Contact with a
“live” wire will make exposed metal parts of the
machine “live” and shock the operator.
t) Children must be instructed not to play with the
machine.
u) The machine is not intended for use by debilit-
ated persons or children.
v) Lifting the saw and saw carriage by crane is not
permissible.
w) Do not stand the saw and saw carriage on an
inclined surface. Always check to ensure that
the saw and saw carriage are standing securely.
5.2 Proper organization of the work area
a) Ensure that the workplace is well lit.
b) Ensure that the workplace is well ventilated.
Exposure to dust at a poorly ventilated workplace
may result in damage to the health.
c) Don’t work in closed rooms. Carbon monox-
ide, unburned hydrocarbons and benzene in the
exhaust gas may cause asphyxiation.
d) Keep the workplace tidy. Objects which could
cause injury should be removed from the work-
ing area. Untidiness at the workplace can lead to
accidents.
e) Secure the workpiece. When necessary, use
clamps or a vice to secure the workpiece. Don’t
hold the workpiece by hand.
f) Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewellery
or long hair can be caught in moving parts.
g) It is recommended that non-slip shoes or boots
are worn when working outdoors.
h) Keep children away. Keep other persons away
from the working area.
i) Do not overreach. Keep proper footing and bal-
ance at all times. This enables better control of
the power tool in unexpected situations.
j) Fit the filled water tank to the saw carriage only
after fitting the saw to the saw carriage. This
will prevent the saw carriage falling over.
k) Concealed electric cables or gas and water
pipes present a serious hazard if damaged while
you are working. Accordingly, check the area in
which you are working beforehand (e.g. using
a metal detector). External metal parts of the
machine may become live, for example, when an
electric cable is damaged accidentally.
l) Don’t work from a ladder.
m) Don’t work above shoulder height.
n) If the work involves breaking right through, also
apply the appropriate safety measures at the
opposite side. Parts breaking away could fall out
and / or fall down and injure other persons.
o) Secure the area below the working area.
p) When using the wet cutting technique, take
care to ensure that the water drains away in
controlled fashion and check that the water or
water spray presents no hazard and causes no
damage to the surrounding area.
q) Secure the area below the working area.
5.3 Thermal
a) Wear protective gloves when changing cutting
tools as they get hot during use.
b) The exhaust system and motor get very hot.
Always hold the machine securely with both
hands on the grips provided.
5.4 Liquids (gasoline and oil)
a) Store gasoline and oil in a well-ventilated room
in fuel containers in compliance with regula-
tions.
b) Allow the machine to cool before refueling.
c) Use a suitable funnel when refueling.
d) Don’t use the gasoline or other flammable li-
quids for cleaning.
e) Don’t refuel the machine at the workplace.
f) When refueling, take care to avoid spillage of
gasoline.
5.5 Sawing slurry
Avoid skin contact with sawing slurry.
en
8
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

5.6 Vapors
a) Don’t smoke when filling the tank with fuel!
b) Avoid inhaling gasoline vapors and exhaust
fumes.
c) Hot exhaust gases containing sparks or sparks
generated by the cutting operation may cause
fire or explosion. Take care to ensure that the
sparks generated do not ignite flammable (gas-
oline, dry grass, etc.) or explosive (gas, etc.)
substances.
5.7 Dusts
a) Large quantities of dust hazardous to the health
are generated when cutting (especially when dry
cutting). The operator and bystanders must wear
suitable dust masks while the machine is in use.
b) Dust or vapors containing chemical substances
may be generated when working on unknown
materials. These substances could cause serious
damage to the health. Obtain information about
hazards presented by the materials from the cli-
ent or the authorities responsible. The operator
of the machine and any bystanders must wear
respiratory protection that is approved for use
in conjunction with the applicable substance.
c) To reduce the amount of dust generated when
cutting mineral materials and asphalt, we re-
commend use of the wet cutting technique.
d) Dust from material such as paint containing lead,
some wood species, minerals and metal may be
harmful. Contact with or inhalation of the dust
may cause allergic reactions and/or respiratory
diseases to the operator or bystanders. Material
containing asbestos must only be treated by spe-
cialists. To reduce the amount of dust produced
when cutting, we recommend use of the wet
cutting method. Ensure that the workplace is
well ventilated. The use of a dust mask of filter
class P2 is recommended. Follow national re-
quirements for the materials you want to work
with.
5.8 Requirements to be met by users
a) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.
b) Stay alert, watch what you are doing and use
common sense when operating the machine.
Don’t use the machine when you are tired or
under the influence of drugs, alcohol or med-
ication. A moment of inattention while operating
machines may result in serious personal injury.
5.9 Safety warnings for abrasive cutting-off
operations
a) Check that the cutting disc is fitted in accordance
with the manufacturer’s instructions.
b) Cutting discs must be stored and handled care-
fully in accordance with the manufacturer’s in-
structions.
c) Use only cutting discs with a rated maximum
permissible speed which is at least as high as
the machine’s highest running speed.
d) Cutting discs which are damaged or out of round
(causing vibration) must not be used.
e) The outside diameter and the thickness of the
cutting disc must be within the capacity rating
of the machine. Incorrectly sized accessories
cannot be adequately guarded or controlled.
f) Don’t use toothed cutting discs (saw blades or
similar). Blades or discs of this kind frequently
cause kickback or loss of control of the machine.
g) Guide the machine evenly and do not apply
lateral pressure to the cutting disc. Always bring
the machine into contact with the workpiece at
right angles. Don’t attempt to alter the line of
cut by applying lateral pressure or by bending
the cutting disc while cutting is in progress.
This presents a risk of damaging or breaking the
cutting disc.
h) Don’t attempt to brake the cutting disc with the
hand.
i) The cutting disc and flange or any other access-
ory must fit the arbor of the machine exactly.
Cutting discs or accessories with arbor holes that
do not match the mounting hardware of the ma-
en
9
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

chine will run out of balance, vibrate excessively
and may cause loss of control.
j) Always use undamaged disc mounting flanges
of the correct diameter for the cutting discs
used. Correctly sized flanges support the cut-
ting disc and thus reduce the possibility of disc
breakage.
k) When fitting the cutting disc, always take care
to ensure that the disc’s specified direction of
rotation corresponds to the direction of rotation
of the machine.
l) Store the cutting disc in accordance with the
manufacturer’s recommendations. Incorrect or
careless storage may damage the cutting disc.
m) Don’t use cutting discs with a thickness greater
than 5.5 mm (0.22").
n) Remove the cutting disc from the machine after
use. The cutting disc may suffer damage if the
machine is transported with the disc fitted.
o) Abrasive cutting discs for gasoline-powered cut-
off saws which are used for wet cutting must
be used up the same day as long periods of
exposure to moisture have a negative effect on
the strength of the disc.
p) Observe the expiry date for resin-bonded cutting
discs and don’t use the discs after this date.
q) Resharpen polished diamond segments (no dia-
monds project from the segment matrix) by cut-
ting with the disc in a very abrasive material
such as sandstone.
r) Don’t use damaged diamond cutting discs
(cracks in the steel disc, broken or polished
segments, damaged arbor hole, bent or
distorted steel disc, heavy discoloration due to
overheating, steel disc worn away beneath the
segments, diamond segments with no lateral
overhang, etc.)
5.10 Personal protective equipment
The user and any other persons in the vicinity
must wear suitable eye protection, a hard hat, ear
protection, protective gloves and safety footwear
while the machine is in use.
6. Before use
6.1 Fuel
NOTE
The two-stroke motor runs on a mixture of gasoline
and oil. The quality of the fuel mixture decisively
influences the running and life expectancy of the
motor.
CAUTION
Avoid direct skin contact with gasoline.
CAUTION
Ensure that the workplace is well ventilated in order
to avoid breathing in gasoline fumes.
CAUTION
Use a fuel container that complies with the applic-
able regulations.
CAUTION
Alkylate gasoline does not have the same density
(specific weight) as conventional gasoline. To avoid
damage when alkylate gasoline is used, the machine
must be readjusted by Hilti Service. Alternatively, the
oil content can be increased to 4% (1:25).
6.1.1 Two-stroke oil
Use Hilti two-stroke oil for air-cooled motors or a
good quality two-stroke oil with the TC classification.
6.1.2 Gasoline
Use regular or super gasoline with an octane rating
of at least 90 ROZ.
The alcohol content (e.g. ethanol, methanol...) of the
fuel used must not exceed 10%, otherwise the life
expectancy of the motor will be greatly reduced.
en
10
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

5100 rpm
max.
6.1.3 Mixing fuel
CAUTION
The motor will suffer damage if run with fuel mixed
in the wrong ratio or with unsuitable oil. Use the
following mix ratio with Hilti two-stroke oil: 1 part
oil + 50 parts gasoline. Use the following mix ratio
with quality two-stroke oil with the TC classification:
1 part oil + 25 parts gasoline.
1. Pour the required quantity of two-stroke oil into
the fuel container.
2. Add the gasoline to the fuel container.
3. Close the cap on the fuel container.
4. Mix the fuel by shaking the fuel container.
6.1.4 Storing the fuel mixture
CAUTION
Pressure may build up in the fuel tank. Accordingly,
take care when opening the fuel tank cap.
CAUTION
Store the fuel in a dry, well-ventilated room.
Mix only enough fuel for a few days’ use.
Clean the fuel container occasionally.
6.1.5 Filling the machine with fuel
CAUTION
Don’t refuel the machine right at the place where
you are working (move at least 3 meters (10 feet)
away from the object you have been cutting).
DANGER
Don’t smoke when filling the tank with fuel!
CAUTION
Don’t refuel the machine in a room where a naked
flame or sparks could ignite the gasoline vapors.
CAUTION
Don’t refuel the machine while the motor is running.
CAUTION
Don’t refuel the machine while the motor is hot.
CAUTION
Wear suitable protective gloves when refueling.
CAUTION
Take care to avoid spilling fuel.
CAUTION
If your clothing becomes soiled with gasoline while
refueling, you must change your clothing.
CAUTION
After refueling, clean the machine and accessories
to remove any spilt fuel.
DANGER
Check to ensure there is no leakage from the ma-
chine. Don’t start the machine if fuel is found to be
leaking from it.
1. Mix the fuel (two-stroke oil / gasoline mixture)
by shaking the fuel container.
2. Place the machine in a steady upright position.
3. Open the fuel tank cap by turning it counterclock-
wise.
4. Fill the tank slowly using a funnel.
5. Close the fuel tank cap by turning it clockwise.
6. Close the cap on the fuel container.
6.2 Fitting and changing the cutting disc 3
CAUTION
Cutting discs which are damaged or out of round
(causing vibration) must not be used.
CAUTION
The maximum permissible speed of the disc or
blade must be at least as high as the maximum
speed printed on the machine.Accessories driven at
a speed above their maximum permissible speed may
break and fly apart.
CAUTION
Use only cutting discs with a 20 mm or 25.4 mm
(1") arbor hole.
CAUTION
The cutting discs, flanges or other accessories
must properly match the arbor size of the machine.
Cutting discs or accessories with arbor holes that do
not match the mounting hardware of the machine will
en
11
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

run out of balance, vibrate excessively and may cause
loss of control.
CAUTION
Don’t use synthetic resin-bonded fiber-reinforced
cutting discs that have exceeded their use-by date.
CAUTION
Don’t use damaged diamond cutting discs (cracks in
the steel disc, broken or polished segments, dam-
aged arbor hole, bent or distorted steel disc, heavy
discoloration due to overheating, steel disc worn
away beneath the segments, diamond segments
with no lateral overhang, etc.)
1. Insert the locking pin in the hole in the drive belt
cover and turn the cutting disc until the locking
pin engages.
2. Use the wrench to release the clamping screw by
turning it counterclockwise.
3. Remove the clamping flange and the cutting disc.
4. Check that the mounting bore of the cutting disc
to be fitted corresponds with the centering collar
of the cutting disc mounting flange. The mount-
ing flange is provided with a 20 mm diameter
centering collar on one side and a 25.4 mm (1")
diameter centering collar on the opposite side.
5. Clean the clamping and centering surfaces on
the machine and on the cutting disc.
6. CAUTION Take care to ensure that the direction
of rotation of the cutting disc (indicated by an
arrow) matches the direction of rotation shown
on the machine.
Place the cutting disc on the centering collar of
the clamping flange.
7. Place the clamping flange on the drive arbor
and tighten the cutting disc clamping screw by
turning it clockwise.
8. Insert the locking pin in the hole in the drive belt
cover and turn the cutting disc until the locking
pin engages.
9. Tighten the cutting disc clamping screw to a
torque of 25 Nm.
6.3 Adjusting the guard
DANGER
Don’t operate the machine without the protective
devices that belong to it.
DANGER
Adjust the guard to the correct position. Direct
the particles of material removed away from the
operator and the machine.
WARNING
The motor and the cutting disc must have come
to a complete stop before making adjustments or
changing parts etc.
Hold the guard by the grip provided and rotate it to
the desired position.
6.4 Converting the saw from normal cutting
mode to flush cutting mode 4
DANGER
Adjust the guard to the correct position. Direct
the particles of material removed away from the
operator and the machine.
NOTE
After completion of flush cutting it is recommended
that the saw is converted back to normal cutting mode
due to the more favorable balance in this position.
NOTE
After doing this, check that the cutting disc can be
turned easily by hand and that all screws have been
tightened securely.
en
12
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00

DANGER
Don’t operate the machine without the protective
devices that belong to it.
In order to facilitate cutting as closely as possible to
edges and walls etc., the forward section of the saw
arm can be turned and fitted in the reversed position
so that the cutting disc, when seen from behind, is
positioned to the right of the saw arm.
1. Remove the spray jets from the guard.
2. Slacken the three clamping nuts on the forward
section of the saw arm approx. one complete
turn.
3. Release the tension on the drive belt by turning
the belt tensioning cam counterclockwise care-
fully as far as it will go (until resistance is felt,
i.e. approx. ¼ of a turn).
4. Remove the three clamping nuts and the two
securing screws from the forward section of the
saw arm, then remove the drive belt cover and
the forward section of the saw arm.
5. Release the four securing screws on the rear
drive belt cover and remove the cover.
6. Remove the stop screw that limits rotation of the
forward section of the saw arm.
7. Place the drive belt carefully over the drive pulley.
8. Fit the forward section of the saw arm onto the
rear section of the saw arm. Fit only the middle
clamping nut. Tighten the nut only finger-tight.
9. Rotate the disc guard until the opening is at the
rear.
10. Tension the drive belt by turning the belt tension-
ing cam clockwise carefully as far as it will go
(until resistance is felt, i.e. approx. ¼ of a turn).
11. Secure the forward drive belt cover with the two
clamping nuts and two securing screws.
12. Tighten the three clamping nuts securely (18
Nm).
13. Fit the rear drive belt cover and secure it with the
four screws.
14. Rotate the disc guard until the opening is at the
front.
15. Fit the spray jets in the openings at the front of
the blade guard.
6.5 Locking rotary movement of the guide
wheels 5
WARNING
When working on roofs, scaffolds and/or slight
slopes, always lock the guide wheels to prevent the
saw rolling away inadvertently and possibly falling.
Use the built-in safety feature which allows you
to lock the wheels by fitting them in the reversed
position (turned through 180°).
1. Release the guide wheel mounting screws and
remove the guide wheels.
2. Reverse the guide wheels (turn through 180°)
and refit the mounting screws.
3. Check that the guide wheels are mounted se-
curely.
6.6 Saw carriage 6
NOTE
We recommend use of the saw carriage when the
machine is used extensively for floor sawing.
NOTE
Especially when using the machine in this config-
uration for the first time, check to ensure that the
throttle cable is correctly adjusted. When the throttle
control is pressed fully, the machine must run up to
maximum speed. If this is not the case, the throttle
cable can be readjusted by way of the cable tensioner.
CAUTION
Switch off the saw at the stop switch immediately if
the throttle cable on the saw carriage gets stuck.
DANGER
Before starting the engine, check that the saw is
correctly secured to the saw carriage.
1. Move the cutting depth adjustment lever into the
upper position.
2. Open the hold-down device by releasing the
screw knob.
3. Fit the saw into the forward mount with the
wheels as shown and swing the grip of the saw
under the hold-down device.
4. Secure the saw by tightening the screw knob.
5. Fit the water tank after filling it.
6. Adjust the grip to a convenient working height.
7. Adjust the guard to the correct position.
en
13
Printed: 07.07.2013 | Doc-Nr: PUB / 5069783 / 000 / 00