STOPPING THE ENGINE
•
Release the throttle trigger.
•
Move the start/stop switch to the “stop” position. The engine stops.
PETROL SAW
BASIC INSTRUCTIONS
(Hilti DSH 900-X)
PRE-OPERATION CHECK
Check the fuel level. To add fuel:
•
Mix the fuel (two-stroke oil / gasoline mixture) by shaking the fuel
container. Use a mixing ratio of 1:50. This corresponds to 1 part good-
quality two-stroke oil that complies with the API-TC specification and
50 parts gasoline
•
Place the product in a steady upright position.
•
Open the fuel tank by turning the cap counterclockwise and then
removing the cap.
•
Fill the tank slowly using a funnel.
•
Close the fuel tank by fitting the cap and then turning it clockwise.
Fitting a cutting disc:
•
Risk of injury and damage. Damaged cutting discs may break. If
the cutting disc has been subjected to an impact, check the disc for
damage and replace it if necessary. Never use cutting discs that are
damaged, run untrue or vibrate. Don’t use synthetic resin-bonded
fiber-reinforced cutting discs which have exceeded their use-by date
or already softened due to water absorption.
1. Insert the locking pin in the hole in the drive belt cover and turn the
cutting disc until the locking pin engages.
2. Release the securing screw by turning the screw counterclockwise
with the wrench and then remove the screw and washer.
3. Remove the locking pin.
4.
Remove the clamping flange and the cutting disc.
5.
Check that the mounting bore of the cutting disc to be fitted
corresponds with the centering collar of the cutting disc mounting
flange.
6. Clean the clamping and centering surfaces on the product and on the
cutting disc.
7. Place the cutting disc with centering collar on the drive arbor and
check that the direction of rotation is correct. The direction-of-
rotation arrow on the cutting disc must match the direction of rotation
indicated on the product.
STARTING THE ENGINE
•
Press the decompression valve (once).
•
When starting the cold engine (only when cold), squeeze the primer
bulb 2 to 3 times (until the primer bulb is completely filled with fuel).
•
Press the throttle safety grip and keep it pressed.
•
Press the throttle trigger and keep it pressed.
•
Move the start/stop switch to the “start” position.
•
Release the throttle safety grip and throttle trigger.
•
This half-throttle position is activated.
•
Check that the cutting disc is free to rotate.
•
Position your right foot over the lower part of the rear grip.
•
Pull the starter handle slowly with your right hand until resistance is
felt.
•
Pull the starter handle vigorously.
•
Repeat this action until the engine starts.
•
Press the throttle trigger briefly as soon as the engine starts.
•
This disengages the half-throttle position and the engine then runs at
idling speed when the throttle is released.
MAIN COMPONENTS
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6. Close the fuel canister.
5.2
Assembly and adjustment
WARNING
Risk of injury.
Contact with the rotating cutting disc can lead to injury. Hot parts of the machine or a hot
cutting disc may cause burning injuries.
▶
Before fitting or adjusting any parts of the product, make sure that the engine is switched off, that the
cutting disc has completely stopped rotating and that the product has cooled down.
▶
Wear protective gloves.
5.2.1 Fitting a cutting disc
WARNING
Risk of injury and damage.
Cutting discs or fastening parts that don’t fit correctly can suffer irreparable
damage or lead to loss of control of the product.
▶
Use only cutting discs with a rated maximum permissible speed that’s at least as high as the maximum
speed stated on the product. The cutting discs, flanges and screws used must fit the product.
▶
Use only cutting discs with an arbor size (mounting hole diameter) of 20 mm or 25.4 mm (1").
CAUTION
Risk of injury and damage.
Damaged cutting discs may break.
▶
If the cutting disc has been subjected to an impact, check the disc for damage and replace it if necessary.
▶
Never use cutting discs that are damaged, run untrue or vibrate.
▶
Don’t use synthetic resin-bonded fiber-reinforced cutting discs which have exceeded their use-by date
or already softened due to water absorption.
1. Insert the locking pin in the hole in the drive belt cover and turn the cutting disc until the locking pin
engages.
2. Release the securing screw by turning the screw counterclockwise with the wrench and then remove the
screw and washer.
3. Remove the locking pin.
4. Remove the clamping flange and the cutting disc.
5. Check that the mounting bore of the cutting disc to be fitted corresponds with the centering collar of the
cutting disc mounting flange.
The mounting flange is equipped with a 20 mm diameter centering collar on one side and a 25.4
mm (1") diameter centering collar on the opposite side.
6. Clean the clamping and centering surfaces on the product and on the cutting disc.
7. Place the cutting disc with centering collar on the drive arbor and check that the direction of rotation is
correct.
◁
The direction-of-rotation arrow on the cutting disc must match the direction of rotation indicated on
the product.
Printed: 28.03.2018 | Doc-Nr: PUB / 5265931 / 000 / 01
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English
▶
If the following conditions are met, also take this action:
Conditions
: The engine is hot.
▶
Pull the choke lever upwards and then push it back down again.
◁
This engages half throttle. The choke is not engaged.
▶
Check that the cutting disc is free to rotate.
▶
Position your right foot over the lower part of the rear grip.
▶
Pull the starter handle slowly with your right hand until resistance is felt.
▶
Pull the starter handle vigorously.
▶
When the motor fires for the first time (after 2 to 5 pulls of the starter), move the choke lever back
down to its original position.
▶
Pull the starter handle vigorously and repeat this action until the engine starts.
The motor will flood if the starting procedure is repeated too many times with the choke
engaged.
▶
Press the throttle trigger briefly as soon as the engine starts.
◁
This disengages the half-throttle position and the engine then runs at idling speed when the
throttle is released.
2. If the following equipment exists, also take this action:
DSH 700-X
DSH 900-X
▶
Press the decompression valve (once).
▶
When starting the cold engine (only when cold), squeeze the primer bulb 2 to 3 times (until the primer
bulb is completely filled with fuel).
▶
Press the throttle safety grip and keep it pressed.
▶
Press the throttle trigger and keep it pressed.
▶
Move the start/stop switch to the “start” position.
▶
Release the throttle safety grip and throttle trigger.
◁
This half-throttle position is activated.
▶
Check that the cutting disc is free to rotate.
▶
Position your right foot over the lower part of the rear grip.
▶
Pull the starter handle slowly with your right hand until resistance is felt.
▶
Pull the starter handle vigorously.
▶
Repeat this action until the engine starts.
▶
Press the throttle trigger briefly as soon as the engine starts.
◁
This disengages the half-throttle position and the engine then runs at idling speed when the
throttle is released.
6.2
Checks after starting the engine
1. Check that the cutting disc remains stationary when the engine is idling and, after briefly running at full
speed, that the disc again comes to a complete standstill.
◁
Readjust (reduce) the idling speed if the cutting disc doesn’t stop rotating when the engine is idling.
If this is not possible, please bring the product to
Hilti
Service.
Printed: 28.03.2018 | Doc-Nr: PUB / 5265931 / 000 / 01
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Description
3.1
Product overview
3.1.1 Gasoline-powered cut-off saw
Printed: 28.03.2018 | Doc-Nr: PUB / 5265931 / 000 / 01
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English
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Description
3.1
Product overview
3.1.1 Gasoline-powered cut-off saw
Printed: 28.03.2018 | Doc-Nr: PUB / 5265931 / 000 / 01
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@
Guard
;
Water supply
=
Front grip
%
Water valve
&
Pull start
(
Fuel tank cap
)
Choke lever / half-throttle lock (DSH 700
OR DSH 900)
+
Throttle trigger
§
Rear grip
/
Type identification plate
:
Fuel-level sight glass
∙
Guide rollers
$
Cutting disc
£
Clamping screw
|
Clamping flange
¡
Spark plug connector
Q
Decompression valve
W
Throttle safety grip
E
Start/stop switch (DSH 700 OR DSH 900)
E
Start/stop switch with integrated half-
throttle lock (DSH 700-X OR DSH 900-X)
R
Primer bulb
T
Water connection
Z
Grip for guard adjustment
U
Disc direction-of-rotation indicator (arrow at
front of guard)
I
Saw arm
O
Hole for locking pin for changing cutting
discs
P
Pump cover
Ü
Air filter cover
Printed: 28.03.2018 | Doc-Nr: PUB / 5265931 / 000 / 01
