00_Cover_DSH700_900_P3.qxd:00_Cover_DSH700_900_P3 15.11.2010 16:26 Uhr Seite 1
DSH 700 /
DSH 900
12
17
2
4
5
3
Hilti Corporation
LI-9494 Schaan
Tel.: +423/2342111
Fax: +423/2342965
8
Operating instructions
Mode d’emploi
en
fr
4
7
Manual de instrucciones
es
10
6
1/12
13
15
16
14
5
1
2
4
2/8
5
0.5mm
3
1/3
1/3
1/3
6
2/6
3/8
4/7
1
5
Hilti = registered trademark of Hilti Corp., Schaan W 3503 1110 00-Pos. 3
Right of technical and programme changes reserved S. E. & O.
1
Printed in Italy © 2010
288292 / F
ORIGINAL OPERATING INSTRUCTIONS
DSH 700/ DSH 900 cut-off saw
en
Parts, operating controls and indicators (DSH 700 /
DSH 900) 1
Forward grip
It is essential that the operating instruc-
tions are read before the machine is oper-
ated for the first time.
@
;
=
%
&
(
)
+
§
/
:
·
$
£
|
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Q
W
E
R
T
Z
U
I
O
Rear grip
Guide wheels
Always keep these operating instructions
together with the machine.
Start/stop switch
Choke lever / half-throttle lock
Throttle safety grip
Throttle trigger
Decompression valve
Fuel pump
Ensure that the operating instructions are
with the machine when it is given to other
persons.
Starter handle
Cutting disc
Clamping screw
Hole for locking pin for changing cutting discs
Clamping flange
Guard (hood)
Disc guard adjustment grip
Water valve
Water connection
Fuel tank cap
Air filter cover
Belt tensioner
Contents
1. General information
2. Description
3. Accessories
4. Technical data
5. Safety instructions
6. Before use
7. Operation
8. Care and maintenance
9. Troubleshooting
10. Disposal
Page
2
3
4
5
6
9
13
14
18
20
Exhaust / muffler
Spark filter
Spark plug connector
Type identification plate
11. Federal emission control warranty
statement
12. Manufacturer’s warranty
20
21
1 These 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
gasoline-powered cut-off saw.
DSH-FSC saw carriage 2
Grip
Throttle trigger
@
;
Cutting depth adjustment
=
Hold-down device
Water tank
%
&
Water connection
(
Axial adjustment
)
+
Throttle cable
Machine cradle
§
1
1. General information
Obligation signs
1.1 Safety notices and their meaning
DANGER
Draws attention to imminent danger that could lead
to serious bodily injury or fatality.
en
Wear
protective
gloves.
Wear safety
shoes.
Wear ear
protection, eye
protection,
Don’t use
toothed
cutting discs.
WARNING
Draws attention to a potentially dangerous situation
that could lead to serious personal injury or fatality.
respiratory
protection and
a hard hat. Eye
protective
devices must
comply with
ANSI Z87.1.
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.
Don’t use
damaged
cutting discs.
Smoking and
naked flames
prohibited.
1.2 Explanation of the pictograms and other
information
Prohibition signs
Symbols
WARNING!
Read and
follow all
Motor stop
system
Fuel pump
Transport by
crane is not
permissible.
safety
precautions in
the operator’s
manual.
Warning signs
Failure to
follow these
instructions
could result in
serious or fatal
injury.
General
warning
Warning: hot
surface
Warning:
Flying sparks
present a fire
risk.
Warning: Risk
of kickback.
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.
max.
5100 rpm
Warning: Don’t
inhale toxic
vapors or
exhaust
Minimum
permissible
speed rating of
the cutting
Type:
fumes.
discs used
Generation: 01
Serial no.:
2
2. Description
sive granulate. These cutting discs feature fabric or
fiber reinforcement which improves their strength,
toughness and breakage resistance.
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.
en
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.
Working on materials hazardous to the health (e.g.
asbestos) is not permissible.
2.4 Diamond cutting discs for hand-guided
gasoline-powered cut-off saws
Observe the information printed in the operating in-
structions concerning operation, care and mainte-
nance.
Diamond cutting discs for gasoline-powered cut-off
saws consist of a steel core (disc) with diamond
segments (metallically bonded industrial diamonds).
Nationally applicable industrial safety regulations
must be observed.
NOTE
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 encoun-
tered. The machine and its ancillary equipment may
present hazards when used incorrectly by untrained
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.
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
With the DSH 700-12" use only diamond discs or
synthetic-resin-bonded fiber-reinforced cutting discs
with a diameter of 12" and a permissible peripheral
speed of at least 80m/sec. With the DSH 700-14",
DSH 900-14" and DSH 900-16" use only diamond
discs or synthetic-resin-bonded fiber-reinforced cut-
ting discs with a diameter of 14" or, respectively, 16"
(DSH 900-16") and a permissible peripheral speed of
at least 100m/sec. The cutting disc manufacturer’s
instructions on fitting and using the discs must also
be observed.
Don’t work in closed, poorly ventilated rooms.
2.2 Items supplied as standard
1
1
1
1
Machine
DSH tool set
Operating instructions
DSH consumables kit
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
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 abra-
3
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.
3. Accessories
Accessories for the DSH 700 and DSH 900
Diamond cutting disc
en
000000, See main catalog.
Abrasive cutting disc
000000, See main catalog.
365826
365595
431364
267736
Two-stroke oil
Water supply unit
Saw carriage
Hard hat
DSH (1 L)
DWP 10
DSH-FSC
Protective glasses
Container
Consumables kit
285780
365828
365602
I-VO B05 PS clear
DSH
DSH
Consumables and wearing parts for the DSH 700
261990
412230
359425
359476
412228
412237
359648
412245
412261
412257
412264
Air filter
Cord (5 pcs)
Starter
Drive belt
Filter element
Spark plug
DSH
DSH
DSH 700
DSH 12/14"
DSH
DSH
DSH
DSH 700
DSH
DSH
Tool set
Cylinder set
Fastening screw assy.
Flange (2)
Centering ring 20 mm / 1"
DSH
Consumables and wearing parts for the DSH 900
261990
412230
359427
359476
359477
412228
412237
359648
412384
412261
412257
412264
Air filter
Cord (5 pcs)
Starter
Drive belt
Drive belt
Filter element
Spark plug
Tool set
Cylinder set
Fastening screw assy.
Flange (2)
DSH
DSH
DSH 900
DSH 12/14"
DSH 16"
DSH
DSH
DSH
DSH 900
DSH
DSH
Centering ring 20 mm / 1"
DSH
4
4. Technical data
Right of technical changes reserved.
DSH 700 30 cm
DSH 700 35 cm
/ 14"
DSH 900 35 cm
/ 14"
DSH 900 40 cm
/ 16"
Machine
/ 12"
en
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
68.7 cm³ (4.19 in³) 68.7 cm³ (4.19 in³) 87 cm³ (5.31 in³)
87 cm³ (5.31 in³)
Cubic capacity
Weight without
cutting disc, tank
empty
11.3 kg (24.91 lb)
11.5 kg (25.35 lb)
11.7 kg (25.79 lb)
11.9 kg (26.23 lb)
Weight with saw
carriage, without
cutting disc, tank
empty
42.3 kg (93.25 lb)
42.5 kg (93.7 lb)
42.7 kg (94.14 lb)
42.9 kg (94.58 lb)
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
Motor speed
10,000 200/min
10,000 200/min
10,000 200/min
10,000 200/min
Idling 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
Ignition (type)
783 x 261 x 434
808 x 261 x 434
808 x 261 x 434
856 x 261 x 466
Electronically-
Electronically-
Electronically-
Electronically-
controlled ignition controlled ignition controlled ignition controlled ignition
timing
timing
timing
timing
Electrode gap
Spark plug
0.5 mm (0.02")
0.5 mm (0.02")
0.5 mm (0.02")
0.5 mm (0.02")
Manufacturer: NGK Manufacturer: NGK Manufacturer: NGK Manufacturer: NGK
Type: CMR7A-5
Type: CMR7A-5
Type: CMR7A-5
Type: CMR7A-5
Carburetor
Manufacturer:
Walbro
Manufacturer:
Walbro
Manufacturer:
Walbro
Manufacturer:
Walbro
Model: WT
Model: WT
Model: WT
Model: WT
Type: 895
Type: 895
Type: 895
Type: 895
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 cm³ (54.9 in³) 900 cm³ (54.9 in³) 900 cm³ (54.9 in³) 900 cm³ (54.9 in³)
Reversible
20 mm (0.79") or
25.4 mm (1")
Reversible
20 mm (0.79") or
25.4 mm (1")
Reversible
20 mm (0.79") or
25.4 mm (1")
Reversible
20 mm (0.79") or
25.4 mm (1")
Cutting disc mount
Disc arbour size
Max. disc outside
diameter
308 mm (12.13")
359 mm (14.13")
359 mm (14.13")
410 mm (16.14")
102 mm (4.02")
102 mm (4.02")
102 mm (4.02")
102 mm (4.02")
Min. flange outside
diameter
5
DSH 700 30 cm
/ 12"
DSH 700 35 cm
/ 14"
DSH 900 35 cm
/ 14"
DSH 900 40 cm
/ 16"
Machine
Max. disc thick-
ness (steel disc
thickness)
Maximum cutting
depth
5.5 mm (0.22")
5.5 mm (0.22")
5.5 mm (0.22")
5.5 mm (0.22")
en
100 mm (3.94")
125 mm (4.92")
125 mm (4.92")
150 mm (5.91")
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.
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.
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.
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.
e) Slits cut in loadbearing walls of buildings or other
structures may influence the statics of the struc-
ture, 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.
r) Always apply full throttle when cutting.
s) Hold the machine by insulated gripping surfaces
when performing an operation where the cutting
disc may contact hidden wiring. Contact with a
“live” wire will make exposed metal parts of the
machine “live” and shock the operator.
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
6
t) Children must be instructed not to play with the l) Don’t work from a ladder.
machine.
m) Don’t work above shoulder height.
u) The appliance is not intended for use by children
n) If the work involves breaking right through, take
the appropriate safety measures at the opposite
side. Parts breaking away could fall out and / or
fall down and injure other persons.
or debilitated persons.
v) Lifting the saw and saw carriage by crane is not
permissible.
en
w) Do not stand the saw and saw carriage on an o) When using the wet cutting technique, take
inclined surface. Always check to ensure that
the saw and saw carriage are standing securely.
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.
5.2 Proper organization of the work area
p) Secure the area below the working area.
5.3 Thermal
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.
a) Wear protective gloves when changing cutting
tools as they get hot during use.
c) Don’t work in closed rooms. Carbon monox-
ide, unburned hydrocarbons and benzene in the b) The exhaust system and motor get very hot.
exhaust gas may cause asphyxiation.
Always hold the machine securely with both
hands on the grips provided.
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.
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 liq-
uids for cleaning.
e) Don’t refuel the machine at the workplace.
f) When refueling, take care to avoid spillage of
gasoline.
h) Keep children away. Keep other persons away
from the working area.
5.5 Sawing slurry
Avoid skin contact with sawing slurry.
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.
5.6 Vapors
k) Concealed electric cables or gas and water
pipes present a serious hazard if damaged while
you are working. Accordingly, check the area in
a) Don’t smoke when filling the tank with fuel!
which you are working beforehand (e.g. using b) Avoid inhaling gasoline vapors and exhaust
a metal detector). External metal parts of the
machine may become live, for example, when an
electric cable is damaged accidentally.
fumes.
c) Hot exhaust gases containing sparks or sparks
generated by the cutting operation may cause fire
7
or explosion. Take care to ensure that the sparks
generated do not ignite flammable (gasoline,
dry grass, etc.) or explosive (gas, etc.) sub-
stances.
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 medi-
cation. A moment of inattention while operating
machines may result in serious personal injury.
5.7 Dusts
en
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
client or the authorities responsible. The opera-
tor of the machine and any bystanders mustwear
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 rec-
ommend use of the wet cutting technique.
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
d) WARNING: Some dust created by grinding,
sanding, cutting and drilling contains chem-
icals known to cause cancer, birth defects,
infertility or other reproductive harm; or seri-
ous and permanent respiratory or other injury.
Some examples of these chemicals are: lead from
lead-based paints, crystalline silica from bricks,
concrete and other masonry products and natural
stone, arsenic and chromium from chemically-
treated lumber. Your risk from these exposures
varies, depending on how often you do this type
of work. To reduce exposure to these chemi-
cals, the operator and bystanders should work
in a well-ventilated area, work with approved
safety equipment, such as respiratory protec-
tion appropriate for the type of dust generated,
and designed to filter out microscopic particles
and direct dust away from the face and body.
Avoid prolonged contact with dust. Wear pro-
tective clothing and wash exposed areas with
soap and water. Allowing dust to get into your
mouth, nose, eyes, or to remain on your skin may
promote absorption of harmful chemicals.
(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 acces-
sory 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-
8
chine will run out of balance, vibrate excessively
and may cause loss of control.
exposure to moisture have a negative effect on
the strength of the disc.
j) Always use undamaged disc mounting flanges p) Observe the expiry date for resin-bonded cutting
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.
discs and don’t use the discs after this date.
q) Resharpen polished diamond segments (no di-
amonds project from the segment matrix) by
cutting 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.)
en
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
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
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 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.
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
CAUTION
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.
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 appli-
cable regulations.
9
6.1.3 Mixing fuel
CAUTION
CAUTION
Take care to avoid spilling fuel.
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.
CAUTION
If your clothing becomes soiled with gasoline while
refueling, you must change your clothing.
en
CAUTION
After refueling, clean the machine and accessories
to remove any spilt fuel.
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.
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.
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.
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.
CAUTION
Store the fuel in a dry, well-ventilated room.
Mix only enough fuel for a few days’ use.
Clean the fuel container occasionally.
6.2 Fitting and changing the cutting disc 3
6.1.5 Filling the machine with fuel
max.
5100 rpm
CAUTION
Cutting discs which are damaged or out of round
(causing vibration) must not be used.
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).
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.
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
Use only cutting discs with a 20 mm or 25.4 mm
(1") arbor hole.
CAUTION
Don’t refuel the machine while the motor is running.
CAUTION
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
Don’t refuel the machine while the motor is hot.
CAUTION
Wear suitable protective gloves when refueling.
10
run out of balance, vibrate excessively and may cause
loss of control.
6.3 Adjusting the guard
CAUTION
Don’t use synthetic resin-bonded fiber-reinforced
cutting discs that have exceeded their use-by date.
en
DANGER
Don’t operate the machine without the protective
devices that belong to it.
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.)
DANGER
Adjust the guard to the correct position. Direct
the particles of material removed away from the
operator and the machine.
WARNING
1. Insert the locking pin in the hole in the drive belt
cover and turn the cutting disc until the locking
pin engages.
The motor and the cutting disc must have come
to a complete stop before making adjustments or
changing parts etc.
2. Use the wrench to release the clamping screw by
turning it counterclockwise.
Hold the guard by the grip provided and rotate it to
the desired position.
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.
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.
Place the cutting disc on the centering collar of
the clamping flange.
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.
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.
NOTE
After doing this, check that the cutting disc can be
turned easily by hand and that all screws have been
tightened securely.
9. Tighten the cutting disc clamping screw to a
torque of 25 Nm.
11
DANGER
6.5 Locking rotary movement of the guide
wheels 5
Don’t operate the machine without the protective
devices that belong to it.
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°).
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.
en
1. Release the guide wheel mounting screws and
remove the guide wheels.
2. Reverse the guide wheels (turn through 180°)
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).
and refit the mounting screws.
3. Check that the guide wheels are mounted se-
curely.
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).
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
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
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.
the blade guard.
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.
12
7. Operation
WARNING
If you notice that the throttle trigger has jammed,
stop the motor immediately by operating the on /
off switch.
en
WARNING
After fitting a new cutting disc, the machine must
be allowed to run at full speed under no load for
approx. 1 minute.
7.1 Starting the motor 7
CAUTION
WARNING
Working on the material may cause it to splinter.
Wear eye protection and protective gloves. Wear
breathing protection if no dust removal system is
used. Splintering material presents a risk of injury to
the eyes and body.
Before using the machine, check to ensure that the
start / stop switch functions correctly. The motor
must stop running when the switch is moved to the
“stop” position.
1. Stand the machine on a solid surface on the
floor.
CAUTION
The power tool and the cutting operation generate
noise. Wear ear protectors. Exposure to noise can
cause hearing loss.
2. Move the start / stop switch to the “start” posi-
tion.
3. Press the fuel pump button (P) 2 to 3 times (until
the pump button is seen to be completely filled
with fuel).
CAUTION
The cutting disc and parts of the machine get hot dur-
ing use. Wear protective gloves when changing the
cutting disc. Touch the power tool only at the grips
provided. You may otherwise burn your hands. Take
care to ensure that the machine, when hot, does not
come into contact with flammable materials during
transport or storage.
4. Press the decompression valve.
5. If the motor is cold, pull the choke lever up-
wards. This activates the choke and engages half
throttle.
6. If the motor is hot, pull the choke lever up and
then push it back down. This engages half throttle
(with no choke).
7. Check that the cutting disc is free to rotate.
8. Hold the forward grip securely with the left hand
and place your right foot in the lower section of
the rear grip.
WARNING
Keep other persons approx. 15 m away from your
workplace. Pay special attention to the working
area behind you.
9. Pull the starter handle slowly with your right
hand until resistance is felt.
DANGER
10. Pull the starter handle vigorously.
11. When the motor fires for the first time (after 2 to
5 pulls of the starter), move the choke lever back
to its original position.
Don’t work in closed rooms. Carbon monoxide, un-
burned hydrocarbons and benzene in the exhaust gas
may cause asphyxiation.
WARNING
12. Repeat this procedure, with the choke disen-
When the motor is idling, the cutting disc must
come to a complete stop. If this is not the case, the
idling speed must be reduced accordingly. If this is
not possible or does not achieve the desired result,
the machine must be returned for repair.
gaged, until the motor starts.
NOTE The motor will flood if the starting proce-
dure is repeated too many times with the choke
engaged.
13
13. Press the throttle as soon as the motor starts.
This disengages the half-throttle position and
the choke (if previously engaged), and the motor
then runs at idling speed when the throttle is
released.
7.2.1 Avoiding stalling 8
CAUTION
Avoid applying excessive pressure when cutting
and don’t allow the cutting disc to stick and stall.
Don’t attempt to cut to great depth immediately.
Application of excessive pressure increases the risk
of cutting disc distortion. Allowing the cutting disc to
stick or stall increases the probability of kickback or
disc breakage.
en
7.2 Cutting techniques
DANGER
Always hold the saw and the saw carriage securely
with both hands on the grips provided. Keep the
grips dry, clean and free from oil and grease.
CAUTION
Support slabs or large workpieces so that the kerf
remains open during the cutting operation.
DANGER
Check that no persons are present within the work-
ing area and, in particular, in the area ahead of the
saw (in the cutting direction).
7.2.2 Avoiding kickback 9
CAUTION
Always bring the machine into contact with the
workpiece from above. Allow the cutting disc to
contact the workpiece only at a point below its
rotational axis.
DANGER
Guide the machine evenly and do not apply lat-
eral 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.
CAUTION
Take special care when inserting the cutting disc in
an existing kerf.
7.3 Stopping the motor
WARNING
If the motor cannot be stopped by operating the on
/ off switch, the motor must be stopped, if need be,
by pulling the choke lever.
CAUTION
Secure the workpiece and the part to be cut off in
order to prevent uncontrolled movement.
NOTE
Always apply full throttle when cutting.
WARNING
Do not lay the machine down until the cutting disc
has stopped rotating. The machine must always be
stored and transported in an upright position.
NOTE
Avoid making excessively deep cuts. Cutting through
thick workpieces should be accomplished, as far as
possible, by making a several cuts.
1. Release the throttle trigger.
2. Move the start / stop switch to the “stop” posi-
tion.
8. Care and maintenance
8.1 Maintenance
8.1.1 Each day before use
Check that the machine is complete and in faultless
condition. Have it repaired if necessary.
Check the machine for leakage. Have it repaired if
necessary.
WARNING
Set the switch to “stop” before carrying out any
maintenance or repairs and before cleaning the
machine.
14
Check the machine for dirt and dust and clean it if NOTE
necessary.
In this machine, most of the dust is removed from
the air flow by a maintenance-free cyclone-type pre-
screening system. This preliminary air cleaning pro-
cess greatly reduces the amount of maintenance
required compared to conventional systems.
Check that all operating controls function correctly.
Have them repaired if necessary.
Check that the cutting disc is in faultless condition.
Replace it if necessary.
en
1. Release the securing screw on the air filter cover
and remove the cover.
2. Carefully remove the dust adhering to the air filter
and the filter chamber (use a vacuum cleaner).
3. Release the screws retaining the filter holder and
remove the air filter.
8.1.2 Every 6 months
Check the tightness of all screws and nuts accessible
from the outside.
Check that the fuel filter is clean (no dirt or deposits)
and replace it if necessary.
Retension the drive belt if it slips when the cutting
disc is under load.
4. Fit the new filter and secure it with the filter
holder.
8.1.3 When necessary
Check the tightness of all screws and nuts accessible
from the outside.
Replace the air filter if the machine doesn’t start or
motor performance drops noticeably.
Check that the fuel filter is clean (no dirt or deposits)
and replace it if necessary.
5. Fit the air filter cover and tighten the retaining
screws.
8.3 Replacing a broken starter cord 12
CAUTION
The housing may suffer damage if the starter cord is
too short. Never shorten the starter cord.
Clean or replace the spark plug if the machine doesn’t
start or is difficult to start.
Retension the drive belt if it slips when the cutting
disc is under load.
Readjust the motor idling speed if the cutting disc
1. Unscrew the three securing screws and remove
the starter assembly.
2. Remove the remaining pieces of the starter cord
from the spool and the starter handle.
3. Make a secure knot in the end of the replacement
starter cord and then pass the free end of the
cord through the hole in the spool from above.
4. Pass the end of the cord through the opening
in the starter housing from below, also through
the starter handle from below, and then make a
secure knot in the end of the cord.
doesn’t stop rotating when the machine is idling.
8.2 Replacing the air filter 10 11
5. Pull a length of the starter cord out of the housing
as shown in the illustration and pass it through
the slot in the spool.
6. Hold the cord securely close to the slot in the
spool and then rotate the spool in a clockwise
direction as far as it will go.
7. Rotate the spool back from its end point at least
a ½ revolution, max. 1 ½ revolutions, until the
slot in the spool is in alignment with the opening
in the starter housing.
8. Hold the spool securely and pull the free end of
the cord at the starter handle out of the housing.
9. Hold the cord under tension, release the spool
and allow the starter cord to be pulled in.
DANGER
The operator and bystanders must wear breathing
protection if the work causes dust.
CAUTION
Dust entering the machine may cause irreparable
damage. Never operate the machine if the air filter
is damaged or missing. When changing the air filter,
the machine should stand upright and should not be
laid on its side. Take care to ensure that no dust finds
its way onto the underlying filter screen.
NOTE
Change the air filter if motor performance drops
noticeably or if the machine becomes difficult to
start.
15
10. Pull the starter cord out as far as it will go and 6. Move the start / stop switch to the “start” posi-
check to ensure that the spool can be turned
by hand at least a further ½ turn in a clock-
wise direction. If this is not possible, spring
tension must be reduced by one revolution in a
counterclockwise direction.
tion.
7. CAUTION Avoid touching the spark plug elec-
trode.
Pull the starter cord (press the decompression
valve first).
en
11. Fit the starter assembly to the machine and press
An ignition spark must now be clearly visible.
8. Use the spark plug wrench to screw the spark
plug into the cylinder (12 Nm).
it down gently.
Pull the starter cord slightly until the coupling
engages and the starter assembly is fully seated.
12. Secure the starter assembly with the three re-
taining screws.
9. Fit the ignition cable connector to the spark plug.
8.6 Retensioning the drive belt 15
CAUTION
8.4 Checking and replacing the fuel filter 13
A slack drive belt can damage the machine. Reten-
sion the drive belt if it slips when a load is applied to
the cutting disc.
NOTE
Check the condition of the fuel filter regularly.
NOTE
NOTE
When refueling the machine, take care to ensure that
no dirt or foreign matter finds its way into the fuel
tank.
The drive belt must be replaced as soon as the
wear mark on the saw arm becomes visible after
retensioning.
1. Remove the cap from the fuel tank.
2. Pull the fuel filter out of the fuel tank.
3. Check the condition of the fuel filter.
The filter must be replaced if badly soiled.
4. Push the fuel filter back into the fuel tank.
5. Close the cap on the fuel tank.
This machine is equipped with a semi-automatic,
spring-assisted drive belt tensioning system.
1. Slacken the three clamping nuts on the forward
section of the saw arm approx. one complete
turn.
2. After releasing the nuts, the drive belt is ten-
sioned automatically by spring pressure.
3. Retighten the three clamping nuts securely (18
Nm).
8.5 Cleaning the spark plug / setting the spark
plug gap / replacing the spark plug 14
CAUTION
8.7 Changing the drive belt 16
NOTE
The spark plug and parts of the motor may be hot
immediately after the machine has been running. To
avoid burning your hands, wear suitable protective After doing this, check that the cutting disc can be
gloves or allow the machine to cool down before turned easily by hand and that all screws have been
touching its parts.
tightened securely.
Use only spark plugs of the type NGK‑CMR7A-5.
1. Use a gentle twisting motion to pull the cable
connector off the spark plug.
2. Use the spark plug wrench to unscrew and re-
move the spark plug from the cylinder.
3. If necessary, clean the spark plug electrode with
a soft wire brush.
1. Slacken the three clamping nuts on the forward
section of the saw arm approx. one complete
turn.
2. 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).
3. Remove the upper and lower clamping nuts and
the two securing screws from the forward section
of the saw arm and remove the drive belt cover.
4. Release the four securing screws on the rear
drive belt cover and remove the cover.
4. Check the spark plug gap (0.5 mm) with the aid
of a feeler gauge and reset it to the correct gap if
necessary.
5. Fit the ignition cable connector to the spark plug
and hold the threaded section of the spark plug
against the cylinder.
16
5. Remove the defective drive belt. Place the new
drive belt carefully over the two drive pulleys.
6. 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).
7. Fit the rear drive belt cover and secure it with the
four screws.
8. Secure the forward drive belt cover with the two
clamping nuts and two securing screws.
9. Tighten the three clamping nuts securely (18
Nm).
8.10 Maintenance
Check all external parts of the machine and the
accessories for damage at regular intervals and check
that all controls operate faultlessly. Don’t operate the
machine if parts are damaged or when the controls
do not function faultlessly. If necessary, the machine
should be repaired by Hilti Service.
en
8.11 Checking the power tool after care and
maintenance
After carrying out care and maintenance, check that
all protective and safety devices are fitted and that
they function faultlessly.
8.8 Adjusting the carburetor 17
CAUTION
Tampering with the carburetor settings may cause
damage to the motor.
8.12 Transporting the machine in a vehicle
The carburetor of this machine (jets H and L) has been
factory set for optimum performance and sealed to
prevent tampering. The idling speed of the machine
(jet T) may be adjusted by the user. All other adjust-
ments must be carried out at a Hilti service center.
NOTE
CAUTION
To avoid a fire hazard, allow the machine to cool
down completely before transporting it.
Use a suitable flat screwdriver (tip width 4 mm/ ⁵/₃₂ ")
and do not force the adjusting screw beyond its
intended adjustment range.
CAUTION
The fuel tank must be completely empty before
the machine is shipped by a parcels service. We
recommend that the original packaging is kept for
use in the event of a need to transport the machine
in this way.
1. Clean the air filter.
2. Allow the machine to run until it reaches its
normal operating temperature.
3. Adjust the idling speed jet (T) so that the motor
runs smoothly when idling but the cutting disc
does not begin to rotate.
1. Remove the cutting disc.
2. Secure the machine to prevent it falling over,
causing damage or fuel spillage.
3. Transport the saw carriage only when the water
tank is empty.
8.9 Cleaning
Careful cleaning of the machine is one of the main
prerequisites for trouble-free, reliable operation.
Heavy dirt and dust deposits on the motor and in the
cooling openings may lead to overheating.
Don’t permit foreign objects to enter the interior of
the machine.
8.13 Storing the machine for a long period of
time
DANGER
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.
Don’t use a high pressure jet system or running water
for cleaning.
Don’t use cleaning agents which contain silicone.
Clean the exterior of the machine at regular intervals
with a slightly damp cloth or a dry brush.
Check that all grips are clean, dry and free from oil
and grease.
1. Empty the fuel tank and then start the motor and
allow it to idle until all remaining fuel is used up.
2. Remove the cutting disc.
17
3. Clean the machine thoroughly and grease the 6. Pull the starter handle a few times.
metal parts.
This will distribute the oil in the cylinder.
7. Replace the spark plug.
8. Wrap the machine in plastic foil.
9. Put the machine into storage.
4. Remove the spark plug.
5. Pour a little two-stroke oil into the cylinder (1 to
2 teaspoons).
en
9. Troubleshooting
Fault
Possible cause
Excessive cutting pressure applied
(cutting disc sticks and stalls in the the machine in a straight line.
kerf).
Remedy
Reduce cutting pressure and guide
Cutting disc slows down or
stops completely while cut-
ting
Drive belt tension too low or the
drive belt is broken.
Re-tension the drive belt or fit a
new belt.
Cutting disc incorrectly fitted or not Check that the disc is fitted and
tightened properly. tightened correctly.
Cutting disc direction of rotation is Check the direction of rotation and
incorrect.
correct if necessary.
Tighten the clamping nuts.
The forward section of the saw arm
is loose.
High vibration, disc wanders
off the cutting line
Cutting disc incorrectly fitted or not Check that the disc is fitted and
tightened properly.
tightened correctly.
Fit a new cutting disc.
Cutting disc is damaged (or unsuit-
able specification, cracked, seg-
ments missing, bent, overheated,
deformed, etc.).
The centering bushing is fitted in-
correctly.
Check that the mounting bore of
the cutting disc to be fitted corre-
sponds with the centering collar of
the cutting disc mounting flange.
Saw doesn’t start or is diffi-
cult to start
The fuel tank is empty (no fuel in
the carburetor).
Fill the fuel tank.
Air filter clogged with dirt or dust.
Replace the air filter.
Dry the spark plug and cylinder
(remove the spark plug).
Disengage the choke lever and re-
peat the starting procedure several
times.
The motor is flooded (spark plug
wet).
Wrong fuel mixture.
Empty the fuel tank and flush out
the tank and fuel lines. Fill the tank
with the correct fuel.
Air in the fuel line (no fuel reaching Remove the air from the fuel line
the carburetor).
by operating the fuel pump several
times.
The fuel filter is dirty or blocked
(no fuel or too little fuel reaching
the carburetor).
Clean the tank and fit a new fuel
filter.
18
Fault
Possible cause
Remedy
No ignition spark visible or spark
is too weak (when spark plug is
removed).
Saw doesn’t start or is diffi-
cult to start
Clean the spark plug to remove
carbon deposits.
Check the spark plug gap and ad-
just it if necessary.
Fit a new spark plug.
en
Check the ignition coil, cable, con-
nectors and switch and replace the
parts if necessary.
Motor compression is too low.
Very low temperatures.
Check the motor compression and,
if necessary, replace worn parts
(piston rings, cylinder, etc.
Allow the machine to warm up
slowly to room temperature and
repeat the starting procedure.
Dirt or dust in the spark guard /
exhaust exit.
Clean the parts.
Release the valve.
The decompression valve is stiff to
operate.
Low motor power / poor cut-
ting performance
Air filter clogged with dirt or dust.
Replace the air filter.
Clean the spark plug to remove
carbon deposits.
No ignition spark visible or spark
is too weak (when spark plug is
removed).
Check the spark plug gap and ad-
just it if necessary.
Fit a new spark plug.
Check the ignition coil, cable, con-
nectors and switch and replace the
parts if necessary.
The wrong fuel or dirt and water in Flush out the fuel system, replace
the fuel tank. the fuel filter and refill with fuel.
The disc specification is unsuitable Change the specification or request
for the material to be cut.
advice from Hilti.
Drive belt or cutting disc slips.
Check the drive belt tension and
disc clamping parts and eliminate
the fault.
Motor compression is too low.
Check the motor compression and,
if necessary, replace worn parts
(piston rings, cylinder, etc.
The machine is operated or han-
dled incorrectly (excessive cut-
ting pressure applied, cutting disc
overheats, disc sticks in the kerf,
unsuitable disc type, etc.).
Observe the information provided
in the operating instructions.
Have the carburetor adjusted by
Hilti Service.
Working at an altitude of more than
1500 m (4900 ft) above sea level.
Have the carburetor adjusted by
Hilti Service.
Incorrect carburetor setting (fuel /
air mixture).
19
Fault
Possible cause
Remedy
Idling speed is too high.
Cutting disc rotates while the
motor is idling
Check the idling speed and adjust if
necessary.
The half-throttle position is en-
gaged.
Faulty centrifugal clutch.
Disengage the half-throttle setting.
en
Replace the centrifugal clutch.
The clutch claws are not engaging.
Starter unit doesn’t work
Clean the parts so that they can
move freely.
10. Disposal
Most of the materials from which Hilti machines or appliances are manufactured can be recycled. The
materials must be correctly separated before they can be recycled. In many countries, Hilti has already made
arrangements for taking back old machines and appliances for recycling. Ask Hilti customer service or your
Hilti representative for further information.
NOTE
Disposing of slurry directly into rivers, lakes or the sewerage system without suitable pretreatment presents
environmental problems. Ask the local public authorities for information about current regulations.
1. Collect the slurry (e.g. using a wet-type industrial vacuum cleaner)
2. Allow the slurry to settle and dispose of the solid material at a construction waste disposal site (the
addition of a flocculent may accelerate the separation process).
3. The remaining water (alkaline, pH value > 7) must be neutralized by the addition of an acidic neutralizing
agent or diluted with a large volume of water before it is allowed to flow into the sewerage system.
11. Federal emission control warranty statement
control system includes parts such as the carburetor
and the ignition system. Where a warrantable condi-
tion exists, Hilti will repair your small non-road engine
at no cost to you. Expenses covered under warranty
include diagnosis, parts and labor.
Your warranty rights and obligations
The U.S. Environmental Protection Agency (EPA), the
California Air Resources Board (CARB), and Hilti are
pleased to explain the Emission Control System War-
ranty applicable to your small non-road engine. In
U.S. and Canada, small non-road engines must be
designed, built and equipped to meet the stringent
federal antismog standards. The equipment engine
must be free from defects in materials and work-
manship which cause it to fail to conform with U.S.
EPA standards for the first two years of engine use
from the date of sale to the ultimate purchaser. Hilti
must warrant the emission control system on your
small non-road engine for the periods of time listed
above, provided there has been no abuse, neglect or
improper maintenance of your unit. Your emission
Manufacturer’s warranty coverage
All 2001 and later small non-road engines are war-
ranted to meet the applicable EPA and CARB require-
ments for two years. If any emission related part on
your engine (as listed above) is defective, the part will
be repaired or replaced by Hilti.
Owner’s warranty responsibilities
As a small non-road engine owner, you are respon-
sible for performance of the required maintenance as
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at no cost to the owner. Hilti shall remedy warranty
defects at authorized Hilti service and repair centers.
Any authorized work done at an authorized Hilti ser-
defined by Hilti in the owner’s manual. Hilti recom-
mends that you retain all receipts covering mainte-
nance on your small non-road engine, but Hilti cannot
deny warranty solely for the lack of receipts or for vice and repair center shall be free of charge to the
owner if it is determined that a warranted part is
defective. Any manufacturer-approved or equivalent
replacement part may be used for any warranty main-
tenance or repairs on emission-related parts, and
must be provided free of charge to the owner if the
part is still under warranty. Hilti is liable for damages
to other engine components caused by the failure of
a warranted part still under warranty. The California
Air Resources Board’s Emission Warranty Part List
specifically defines the emission related, warranted
your failure to ensure the performance of all sched-
uled maintenance. Any replacement part or service
that is equivalent in performance and durability may
be used in non-warranty maintenance or repairs, and
shall not reduce the warranty obligations of the en-
gine manufacturer. As the small non-road equipment
engine owner, you should be aware, however, that
Hilti may deny you warranty coverage if your small
non-road engine or a part en of it has failed due to
abuse, neglect, improper maintenance, unapproved
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modifications or the use of parts not made or ap- parts. These warranted parts are: the carburetor as-
sembly, coil assembly, rotor, spark plug, air filter,
fuel filter, breather manifold and the gaskets.
proved by the original equipment manufacturer. You
are responsible for presenting your small non-road
engine to Hilti as soon as the problem exists. The
warranty repairs should be completed in a reasonable
amount of time, not to exceed 30 days.
Maintenance requirements
The owner is responsible for performing the required
maintenance as defined by Hilti in the owner’s manual.
Coverage
Limitations
Hilti warrants to the ultimate purchaser and each sub-
sequent purchaser that your small non-road equip-
ment engine will be designed, built equipped, at the
time of sale, to meet all applicable regulations. Hilti
also warrants to the initial purchaser and each subse-
quent purchaser that the emission-related warranted
parts are free from defects in material and work-
manship which cause the engine to fail to conform
with applicable regulations for a period of two years.
These warranty periods will begin on the date small
non-road equipment engine is purchased by the ini-
tial purchaser. If any emission-related part on your
engine is defective, the part will be replaced by Hilti
The Emission Control Systems Warranty shall not
cover any of the following: a) repair or replacement
required because of misuse, neglect or lack of re-
quired maintenance, b) repairs improperly performed
or replacements not conforming to Hilti specifications
that adversely affect performance and/or durability,
and alterations or modifications not recommended or
approved in writing by Hilti, and c) replacement of
parts and other services and adjustments necessary
for required maintenance at and after this first sched-
uled replacement point. Except as set forth above, the
warranty terms set forth in section 12 below, apply.
12. Manufacturer’s warranty
Hilti warrants that the tool supplied is free of defects ment as a result of normal wear and tear are not
in material and workmanship. This warranty is valid covered by this warranty.
so long as the tool is operated and handled correctly,
Additional claims areexcluded, unlessstringent na-
tional rules prohibit such exclusion. In particular,
Hilti is not obligated for direct, indirect, inciden-
tal or consequential damages, losses or expenses
in connection with, or by reason of, the use of,
or inability to use the tool for any purpose. Im-
cleaned and serviced properly and in accordance with
the Hilti Operating Instructions, and the technical
system is maintained. This means that only original
Hilti consumables, components and spare parts may
be used in the tool.
This warranty provides the free-of-charge repair or plied warranties of merchantability or fitness for a
replacement of defective parts only over the entire particular purpose are specifically excluded.
lifespan of the tool. Parts requiring repair or replace-
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For repair or replacement, send the tool or related This constitutes Hilti’s entire obligation with regard
parts immediately upon discovery of the defect to to warranty and supersedes all prior or contempo-
the address of the local Hilti marketing organization raneous comments and oral or written agreements
provided.
concerning warranties.
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