After the first 20 hours ....................................47
English – 1
INTRODUCTION
Congratulations
Thank you for purchasing a Husqvarna lawn care product. Through your confidence in us, you have chosen
an exceptionally high quality product.
This manual is a valuable document. It describes your new Husqvarna machine. Read the manual carefully
before attempting to use the machine. Following the instructions (use, service, maintenance, etc.) can
considerably increase the lifespan of your machine and even increase its resale value. Please contact your
dealer for more information.
If you sell your Husqvarna machine, make sure to give the operator’s manual to the new owner.
Use
The dethatcher is used remove the layer of thatch and surface-treat lawns, i.e. power-raking, de-mossing and
collecting thatch in the form of old grass or moss. With an attachment, it can even be used for seeding, both in
initial sowing or overseeding.
Insure your machine
Contact your insurance company to check on insurance coverage for your new machine. You should have
all-inclusive insurance for liability, fire, damage and theft.
Good service
Husqvarna’s products are sold all over the world and only in specialized retail trade with complete service.
This ensures that you as a customer get only the best support and service. Before the machine was
delivered it underwent inspection and was adjusted by your dealer. When you need spare parts or support in
service questions, guarantee issues, etc., please consult the following professional:
This Operator’s Manual belongs to machine with
serial number:
Engine
number:
Serial number
The machine’s serial number can be found on the printed plate attached to the rear side panel of the
machine. The plate includes the following information:
•The machine’s type designation (MODEL).
•The machine’s serial number (S/N).
Please state the type designation and serial number when ordering spare parts.
The engine’s serial number is punched in the crankcase above the oil drainage screw.
The engine type is specified on the crankcase under the air filter but also appears on the decal on the starter.
Please state these when ordering replacement engine parts.
2 – English
SYMBOLS AND DECALS
WARNING!
Xxxx xxx xxxx xx xxxx x xxxx.
Used in this publication to notify the reader of a risk
of personal injury, particularly if the reader should
neglect to follow instructions given in the manual.
Decals and machine-bound instructions
IMPORTANT INFORMATION
Xxxx xxx xxxx xx xxxx x xxxx.
Used in this publication to notify the reader of a risk
of material damage, particularly if the reader
should neglect to follow instructions given in the
manual.
Used also when there is a potential for misuse or
misassembly.
1.Husqvarna logotype
2.Model designation DT18C
3.Model designation DT18
4.Model designation SD18
5.Husqvarna crown
6.Height setting
7.Dial
8.DANGER Mind your feet
9.Seed application chart
8011-243
10. DANGER Beware of thrown material
11. Controls
12. Warning for carbon monoxide
13. Open/Close
14. Caution list
15. Caution for catcher
16. HOT seed hopper cover
17. European standard for machine safety
English – 3
Location of decals
SYMBOLS AND DECALS
4 – English
8011-235
SYMBOLS AND DECALS
Translation of instructions
Decal 9
Seed application chart
Values are approximate; quantities of seed depend
on the speed at which the machine is run. Faster
running speed results in sparser sowing.
Preparing the lawn
•Cut the grass to approximately 1-1.5 cm (1/2").
•Do not water before sowing.
•Remove the layer of old grass cuttings (thatch).
•Aerate the lawn with a ground aerator of the
coring type.
•Fertilize the lawn.
Seed application recommendations
•For best results, sow in two directions with a
45° angle between.
•Water generously immediately afterward and
continue watering moderately for 10–14 days
to keep the soil moist.
•After germination, water sporadically to
encourage root growth.
Decal 12
Warning
Engine exhaust, some of its constituents and
certain vehicle components contain or emit
chemicals considered by the State of California to
cause cancer, birth defects or other reproductive
harm. The engine emits carbon monoxide, which is
a colorless, poisonous gas. Do not use the machine
in enclosed spaces.
Decal 14
Important information
Read and make sure you understand the
Operator’s Manual before use or maintenance.
To obtain a replacement manual, please contact
your dealer.
Observe all safety instructions; otherwise you may
injure yourself or others around you.
Make sure that the machine is in serviceable
condition prior to use.
Make sure that all protective devices are in place
when the machine is in use.
Stop the engine and wait until all machine
movement comes to a standstill before service,
adjustment or cleaning.
Do not run the engine in poorly ventilated spaces.
Make sure nobody is in the vicinity of the machine
before starting and during use.
Avoid slopes that are too steep to use the machine
safely.
Clear any debris from the lawn prior to use.
English – 5
SAFETY INSTRUCTIONS
General use
The object of this manual is to help you use your
Husqvarna machine more safely and to give you
information about how to maintain your machine.
Please read the manual carefully before attempting
to use the machine.
If after reading the operator’s manual you are still
unsure about the safety risks associated with use of
the machine, you should not use the machine.
Please contact your dealer for more information.
These safety instructions only address the basics
for safe use. It would be impossible in the safety
instructions to describe all possible risk situations
that could arise when using the machine. You can,
however, prevent accidents by always using
common sense.
To obtain extra copies of the operator’s manual,
please contact your dealer.
WARNING!
Under no circumstances may the
original design of the machine be
modified without written approval
from the manufacturer. Such
modifications not only affect the
performance and durability of the
machine but may even pose a
safety risk for users and those in
the vicinity. Unauthorized
modifications to the design of the
machine may absolve the
manufacturer from liability for any
resulting personal injury or
property damage. Modifying the
machine without written approval
from the manufacturer may void
the guarantee.
IMPORTANT INFORMATION
Do not use the machine until you have read
the operator’s manual carefully and
understand the instructions given. All
maintenance work or adjustments not
described in this manual must be performed
by an authorized Husqvarna service
workshop.
•Read this manual carefully and make sure you
understand it before using the machine or
performing any maintenance. If the user cannot
read this manual, it is the responsibility of the
machine owner to explain the contents to the
user.
•Follow all safety instructions. Failure to do so
may result in injury to yourself or others.
•Accident prevention regulations, other general
safety regulations, occupational safety rules
and traffic regulations must be followed without
fail.
•All users shall be trained in use of the machine.
The owner is responsible for training users.
8011-040
Read this manual carefully before starting the machine.
•Engage an authorized Husqvarna workshop for
all service and repairs not described in this
manual.
6 – English
SAFETY INSTRUCTIONS
•Husqvarna original spare parts are designed
and specified to maintain high quality and
correct fit for optimal durability and lifespan.
From a safety point of view, you should only
use Husqvarna original spare parts.
•Check that all safety decals are in place. See
the chapter ”Symbols and decals”.
•Learn how to use the machine and its controls
safely and learn to recognize the safety decals.
•Only use the machine for sowing and
dethatching lawns. It is not intended for any
other use.
•Check that the machine is in serviceable
condition prior to use; see the chapter
”Maintenance/Maintenance schedule”.
•Only use the machine in daylight or in other
well-lit conditions. Keep the machine a safe
distance from holes or other irregularities in the
ground. Pay attention to other possible risks.
•Only allow the machine to be used by adults
who are familiar with its use.
•Never allow children or persons not trained in
the use of the machine to use or service it.
Local laws may regulate the age of the user.
•People and animals can distract you causing
you to lose control of the machine. For this
reason, you should always concentrate and
focus on the task at hand.
WARNING!
The engine can become very hot.
To avoid being burned, you must
turn off the engine and wait until
all parts have cooled before
touching the engine.
WARNING!
Overexposure to vibration may
lead to circulatory or nerve
damage, particularly in people who
have impaired circulation.
Contact your doctor if you
experience symptoms that could
have been caused by
overexposure to vibration.
Examples of common symptoms
include numbness, pain, muscle
weakness, change of skin color or
an uncomfortable feeling of
tingling. These symptoms appear
most frequently in the fingers,
hands or wrists.
•Never leave the machine unsupervised with
the engine running.
•Make sure that other people are nearby when
you are using the machine so that you can call
for help should an emergency arise.
•The machine is tested and approved only with
the equipment originally provided or
recommended by the manufacturer.
English – 7
8 – English
English – 9
10 – English
English – 11
SAFETY INSTRUCTIONS
Maintenance
•Never make adjustments with the engine
running.
•Disengage the drive units, shut off the engine
and wait until all moving parts come to a
complete stop before making adjustments,
performing maintenance or cleaning the
machine.
•Disconnect the spark plug cable before
beginning repair work.
•Keep all components in serviceable condition
and make sure all nuts, bolts, etc. are tight.
Replace worn or damaged decals.
•Be careful when checking work tools. Use
gloves when performing maintenance work.
•Never allow persons not trained in the use of
the machine to perform service on it.
•Always park the machine on even ground
before performing maintenance or making
adjustments.
•Do not disassemble the engine. This can
invalidate your guarantee. Contact your dealer
if you have any questions regarding service or
guarantee matters. Follow all maintenance
instructions.
•Do not change the setting of governors and
avoid running the engine with overly high
RPMs. If you run the engine too fast, you risk
damaging the machine components.
•Do not modify safety equipment. Check
regularly to be sure it works properly. The
machine must not be run with defective or
disassembled safety equipment.
8011-027
Disconnect the spark plug cable before repair work.
WARNING!
Wait until all moving parts are
completely still before performing
maintenance on the machine.
Turn off the engine and remove the
spark plug cable.
•The muffler is designed to maintain sound
levels at an approved level and keep direct
exhaust away from the user. Exhaust gases
from the engine are extremely hot and may
contain sparks that can cause fires or burn the
user.
•Never use a machine with a defective muffler.
•Reduce the risk of fire by removing grass,
leaves and other debris that may have
fastened in the machine.
12 – English
8011-121
Keep the machine clean.
English – 13
PRESENTATION
Main components and operating instruments
1.Engine
2.Depth knob with depth lock
3.Depth lever
4.Knob for collapsible handle (DT18C)
8011-104
5.Control for seed hopper (Option DT18)
6.Clutch bar
7.Handle
14 – English
English – 15
16 – English
OFF
ON
PRESENTATION
Spark plug
The engine spark plug is hidden under the ignition
cable shoe. When performing service, it is
important that the engine cannot start accidentally.
For this reason, always remove the ignition cable
shoe from the spark plug. To avoid pulling the
cable, the cable shoe is equipped with a special
handle; see the illustration.
Type of spark plug, see chapter ”Technical data”.
Service instructions, see chapter ”Maintenance/
Ignition system”.
Muffler
The engine muffler is equipped with a heat
protective cowling. Nonetheless, it still becomes hot
when the engine is running. Avoid touching the
muffler when it is warm. Risk for burns.
Oil dipstick
8011-027
The dipstick for the crankcase oil reservoir is
located on the front of the engine. Refill the engine
oil in the hole where the dipstick fits.
When checking the oil level, the dipstick should
not be screwed in. The machine should be parked
on even ground with the engine stopped. Never
run the engine without the dipstick in place. The
engine has an electronic oil level guard. It stops
and cannot be started if the level becomes too low.
Yet you should not rely entirely on the level guard;
rather you should check the oil using the dipstick.
For normal use, we recommend SAE 10W-30weight engine oil service SF-SG; see also the
chapter ”Lubrication/Engine oil”.
Oil drainage
The drainage screw for the crankcase oil reservoir
is located on the front of the engine.
IMPORTANT INFORMATION
Used engine oil is a health hazard and
legislation prohibits disposal on the ground
or in nature; it should always be disposed of
at a workshop or appropriate disposal
location. Avoid skin contact; wash with soap
and water in case of spills.
8011-020
8011-021
OFF
Engine switch
The engine switch stops the engine. The illustration
shows the switch in the OFF position (short
circuited electrical system). To start the engine, the
switch must be first set to the ON position.
ON
8011-026
English – 17
18 – English
PRESENTATION
Cutting unit
Depth lever
Use the depth lever to raise and lower the blades
between working and transport position. When the
lever is up, the blades are in working position.
Depth knob
The knob is used to adjust the cutting depth of the
blades. Turning the knob counterclockwise
increases the working depth.
8011-107
Depth lock
The screw under the depth knob is used to lock the
depth knob to prevent it being changed by machine
vibrations. Undo the depth lock by turning it
counterclockwise before turning the depth knob.
Secure the depth knob with the depth lock after
adjusting settings.
Clutch
The clutch tightens the drive belt and engages the
drive for the blades. When the clutch lever is
pressed against the handle, the blades begin to
rotate. Hold the clutch tightly when working so that
the belt does not slide.
8011-108
8011-109
8011-162
English – 19
20 – English
English – 21
OFF
ON
RUNNING
Starter handle
Misuse of the starter handle can damage the
starter. Do not twist the starter cord around your
hand.
Pull out the handle slowly until the gears mesh.
Then give a sharp pull on the starter handle. Do not
pull out the starter cord completely and do not let
go of the starter handle when extended.
Throttle control
Adjust the engine speed with the throttle. Moving
the lever to the left increases throttle and to the
right decreases throttle.
8011-044
Cutting the engine
If the engine has been running full out, let it run
easily for about 30 seconds to 1 minute at low
speed.
Engine switch
Turn the engine switch counterclockwise to OFF.
Fuel valve
Close the fuel valve. Turn the lever all the way to
the left (see illustration).
8011-034
OFF
ON
8011-026
22 – English
8011-036
RUNNING
Before you start
•Mow the lawn to its normal length.
•Allow the lawn to dry. Wet conditions can cause
extensive damage to healthy grass.
•Set blade depth so that the blades just touch
on a flat surface such as a sidewalk or
driveway.
•Lawns with deep thatch exceeding 2 cm may
be best dethatched in two treatments (spring
and fall) to avoid major shock to an older lawn.
Starting
•Set the depth lever in working position.
IMPORTANT INFORMATION
Clear the lawn of any extraneous objects.
Clearly mark rocks and other fixed objects.
Be especially sure to check for hidden
electrical cables or similar in the surface of
the lawn.
•To engage the clutch in heavy thatch, bear
down on the handle and raise the front wheels
slightly. Hold the clutch engaged against the
handle and carefully lower the machine into the
turf.
•Do a small test area at a slow walking pace.
•If the engine speed drops excessively, the
depth setting is too deep. Turn the depth knob
clockwise.
•If the machine pulls forward and bucks roughly,
the depth setting is too deep. Check for stones
or fixed objects in the lawn. Then turn the
depth knob clockwise.
•Lock the depth knob with the depth lock after
adjusting settings.
8011-107
8011-162
Finishing
•Remove all extracted thatch from the grass
and compost/dispose of properly.
•Other methods for improving your lawn may
include aeration and fertilization.
8011-023
English – 23
MAINTENANCE
Maintenance schedule
The following is a list of maintenance procedures that must be performed on the machine. For those points
not described in this manual, visit an authorized service workshop.
35●
Check the air filter25●
Clean the air filter
Replace air filter cartridge
2)
2)
25●
25●
Clean sludge reservoir for fuel system26●
Check and clean the spark plug27●
Replace the spark plug27●
Check idle speed26●
Check and adjust play in valves
Clean fuel tank
4)
Check, replace fuel lines as necessary
4)
-❍
-❍
4, 5)
-❍
Check clutch and clutch cable-❍
Check flail blade lock washers-❍
Check decals and warning signs-❍
Check the seed holes for the seeder-❍
Check wear and tension on the belts28●
Check blade wear and condition29●
Check the chassis, bolts and set screws-❍
Check the seed control lever for the seeder-❍
Check the wire mountings on the seeder-❍
Lubrication; see the Lubrication schedule
1)
First change after 20 hours.
lubricated twice weekly.
2)
In dusty conditions maintenance is required at shorter intervals.
4)
Performed by authorized service workshop.
● = Described in this manual.
❍ = Not described in this manual.
WARNING!
No service operations may be performed on the engine or unit unless:
•The engine is stopped.
•The ignition cable has been removed from the spark plug.
•The machine is securely parked where it will not tip or begin rolling.
24 – English
5)
Performed every second year.
3)
With daily use, the machine shall be
MAINTENANCE
Replacing the air filter
If the engine seems weak, produces black smoke or
runs unevenly, the air filter may be clogged.
For this reason, it is important to clean and replace
the air filter regularly (see the maintenance
schedule for the proper service interval).
WARNING!
Allow the exhaust system to cool
before performing service. Risk for
burns.
Cleaning/replacement of the air filter is carried out
as follows:
1.Undo the wing nut and lift off the air filter
cowling.
2.Remove the foam rubber pre-filter and clean
using a mild detergent.
Squeeze it dry with a clean cloth.
8011-028
Soak it with new engine oil. Wind the filter in an
absorbent cloth and squeeze out excess oil.
3.Remove the wing nut in the air filter and remove
the paper filter. Tap the paper filter against a
fixed surface to remove dust. If the paper filter
is still dirty or damaged, it must be replaced.
IMPORTANT INFORMATION
Do not use compressed air over 2 bar/30 PSI
to clean the air filter.
Do not wash the paper filter.
Do not oil the paper filter.
8011-030
8011-031
4.Refit the air filter as follows:
Mount the paper filter in the air filter housing
and tighten the wing nut.
5.Replace the pre-filter on the paper filter.
6.Replace the cowling over the air filter housing.
8011-032
English – 25
26 – English
MAINTENANCE
Ignition system
The engine is equipped with an electronic ignition
system. Only the spark plug requires maintenance.
For recommended spark plug, see chapter
”Technical data”.
IMPORTANT INFORMATION
Fitting the wrong spark plug type can
damage the engine.
1.Remove the ignition cable shoe and clean
around the spark plug.
2.Remove the spark plug with a 13/16" (21 mm)
spark plug socket wrench.
3.Check the spark plug. Replace the spark plug if
the electrodes are burned or if the insulation is
cracked or damaged. Clean the spark plug with
a steel brush if it is to be reused.
8011-027
4.Measure the electrode gap with a gapping tool.
The gap should be 0.7–0.8 mm/0.028–0.031".
Adjust as necessary by bending the side
electrode.
5.Reinsert the spark plug, turning by hand to
avoid damaging the threads.
IMPORTANT INFORMATION
Inadequately tightened spark plugs can
cause overheating and damage the engine.
Tightening the spark plug too much can
damage the threads in the cylinder head.
5.After the spark plug is seated, tighten it using a
spark plug wrench so that the washer is
compressed. A used spark plug should be
turned 1/8–1/4 of a turn from the seated
position. A new spark plug should be turned
1/2 a turn from the seated position.
6.Replace the ignition cable shoe.
8011-054
English – 27
Cutting unit
Checking the drive belt
1.Allow the engine to cool.
2.Remove the spark plug cable.
MAINTENANCE
3.Remove the belt guard (see illustration) on the
left side of the machine.
4.Check that the belt is running in the proper
track; the pulleys should guide the belt in a
straight line.
5.Check that the belt and pulleys are not oily. If
they are, first try to clean them with spirits. If
they are heavily coated, take the machine to an
authorized service workshop to fix the oil
leakage and replace the belt.
6.Check the belt for cracks, heat damage or worn
edges. If these symptoms appear, replace the
drive belt; see ”Replacing the drive belt”.
7.Check that guide and tensioning equipment for
the belt is not loose and is properly set; see
”Replacing the drive belt”.
8.Refit the belt guard.
Replacing the drive belt
Replace the drive belt as follows:
1.Allow the engine to cool.
8011-027
8011-275
2.Remove the spark plug cable.
3.Remove the belt guard.
4.Remove the old belt.
5.Check for wear on the pulleys and replace as
necessary.
6.Check the pulley setting against the rotor
pulley and adjust as necessary. The belt should
run in the track.
7.Check the tensioning pulley. The bearings
should rotate freely and evenly. The rocking
lever on the tensioning pulley should be free
with a lateral play of not more than 6.5 mm
(0.25") (see illustration). Replace as necessary.
8.Fit a new belt by first pulling it over the lower
pulley and then the engine pulley. Check that
the tensioning pulley and belt guides end up
outside the belt loop.
9.Adjust the belt guides as necessary and refit
the belt guard.
28 – English
8011-244
8011-245
MAINTENANCE
Wear/Rotation/Replacing flail blades
After you have used your dethatcher for some time,
the blades will begin to wear on the striking edge.
When this happens, their dethatching performance
will diminish. A new combing edge may be obtained
by rotating the entire rotor shaft assembly laterally
(end to end). This procedure can be repeated until
the blades reach their wear limit; see illustration.
Rotate the rotor shaft as follows:
IMPORTANT INFORMATION
Only the flail blade rotor shaft can be rotated
to achieve even wear.
Rotating the rotor shaft
1.Allow the engine to cool.
2.Disconnect the spark plug.
8011-006
A.New blade
B.Worn blade
C.After rotation
8011-027
3.Remove the belt guard (see illustration).
4.Remove the belt guard and pulley from the
rotor shaft (see illustration).
5.Remove the plastic cap from the opposite end
of the shaft and install it where the pulley was
located.
6.Remove the 4 bearing bolts and allow the rotor
shaft to slide out.
7.Check the shaft, bearing, blade length, blade
safety clips and spacers.
8.Rotate the shaft end for end.
9.Refit the bearing bolts.
10. Refi the pulley and check that it is flush against
the bearing collar.
11. Refit the drive belt.
12. Check the pulley alignment to the engine shaft
pulley. The drive belt should run smoothly in its
track. Adjust as necessary. Tighten the pulleys.
13. Refit the belt guard.
14. Reattach the spark plug cable.
8011-275
8011-279
English – 29
MAINTENANCE
Replacing worn flail blades
1.Allow the engine to cool.
2.Disconnect the spark plug.
3.Tip the machine forward; see the section ”Two
minute rule”.
IMPORTANT INFORMATION
When tipping the machine forward observe
the ”Two minute rule”.
4.Remove and dispose of the spring clips (3)
(locking washer type) that hold the blade shaft
(2) in place (see the sketch).
5.Inspect the blade shafts and replace if bent or
worn.
6.Drive the blade shafts out towards the center.
The blades (4) and the rubber spacers (6) will
fall off.
8011-027
7.Fit the new blades and replace the rubber
spacers as necessary. Refer to the illustration
of the components for blade/spacer placement.
8.Install new spring clips.
9.Repeat this procedure for the remaining three
shafts.
10. Reattach the spark plug cable.
30 – English
8011-110
MAINTENANCE
Wear/Replacing delta blades
Over time and due to wear, the blades will diminish in
length. Once the blades have worn down by about
19 mm (3/4"), the overall length of the blade at the
longest point of the blade will be about 64 mm (2 1/2"),
and it will be necessary to replace the blades.
It is possible to replace delta blades without
removing the rotor shaft. Remove the delta blade (2)
by removing the two screws with nuts holding the
blade in place.
Turn the new blade until it is properly aligned; see
illustration.
Wear/Replacing spring tines
Over time and due to wear, the tines will diminish in
length. When the tines can no longer be adjusted to
comb 6 mm (1/4") into the soil, the tines must be
replaced.
8011-111
Spring tines can be replaced without removing the
rotor shaft by using a 1/2" socket wrench. Remove
the screw (3) and replace the spring tine using the
wrench (1). Fit the new spring tine before removing
the tine on the opposite side.
8011-112
English – 31
MAINTENANCE
Two minute rule
The machine may be tipped forward to facilitate
access for cleaning or service, but no longer than
2 minutes.
If the machine is held in this position for too long,
the engine can be damaged by gasoline draining
into the crankcase. Should this happen, perform an
extra oil change on the engine. Remove the spark
plug and turn the engine over a few revolutions with
the starter handle before starting the engine again.
Cleaning and washing
Regular cleaning and washing will increase the
machine’s lifespan. Make it a habit to clean the
machine directly after use, before the dirt sticks.
Check before rinsing that the fuel tank lid is
properly in place to avoid getting water in the tank.
8011-248
Use caution when using high-pressure spray
because warning decals, instruction signs and the
engine can be damaged. Do not exceed 70 bar/
1000 PSI water pressure when cleaning.
Lubricate the machine after cleaning. This is
particularly important if the machine is to be stored.
8011-121
32 – English
Lubrication schedule
LUBRICATION
8011-281
General
Stop the engine and remove the ignition cable before attempting to lubricate the machine.
Unless otherwise specified, when lubricating with grease use Husqvarna’s Universal Grease no. 5310038-
01 or Husqvarna’s Lubrication Grease UL 21 no. 5310060-74.
Wipe away excessive grease after lubrication.
It is important to avoid getting lubricant on the belt or the drive surfaces on the belt pulleys. Should this
happen, attempt to clean them with spirits. If the belt continues to slip after cleaning, it must be replaced.
English – 33
LUBRICATION
1. Engine oil
The engine should be warm (but not hot) when
changing the oil. Warm oil flows out faster and
leaves a smaller quantity of old oil inside the engine.
1.Place a suitable vessel underneath the oil
drainage screw. Remove the oil dipstick (1)
and the oil drainage screw (4).
Tip: Make a channel using a piece of cardboard to
lead the oil directly into the vessel and avoid soiling
the machine chassis.
2.Allow the engine oil to drain into the vessel;
then replace the drainage screw. Tighten it
moderately.
IMPORTANT INFORMATION
Used engine oil is a health hazard and
legislation prohibits disposal on the ground
or in nature; it should always be disposed of
at a workshop or appropriate disposal
location. Avoid skin contact; wash with soap
and water in case of spills.
WARNING!
Engine oil can be very hot if it is
drained directly after stopping the
machine. Allow the engine to cool
somewhat.
8011-045
3.Make sure the machine is parked on even
ground. Fill the new oil using the appropriate
viscosity according to the diagram, API Service
SF-SG, to the upper level mark on the dipstick
= threads on the oil dipstick. The engine takes
0.6 liters/0.63 US qt of oil. When checking the
oil level, the dipstick should not be screwed in.
4.Check that the rubber gasket is in position and
screw the dipstick back into place. Do not
tighten it askew or too hard or you may
damage the threads.
5.Wipe up any spilled oil.
Checking the engine’s oil level.
Make sure that the machine is parked on even
ground with the engine stopped when checking the
oil level.
1.Unscrew the dipstick and wipe it using paper
towel or a lint-free rag.
2.Replace the dipstick without screwing it in.
Remove and check the level on the dipstick.
8011-046
3.Fill oil as necessary to the lip of the dipstick
hole. Oil type, see above.
4.Check that the rubber gasket is in position and
screw the dipstick back into place. Do not
tighten it askew or too hard or you may
damage the threads.
34 – English
8011-020
LUBRICATION
2. Oil change reduction gear 1:6
The reduction gear only appears on a special
version of model DT18C.
The engine’s reduction axle does not have a
drainage screw, but the oil can be drained through
the level plug hole (2) by tipping the machine
forward. Because it is difficult to avoid spilling
gasoline and releasing gasoline fumes, the oil
should not be changed indoors.
1.Empty the fuel tank or put a vessel in place to
collect gasoline spills.
2.Tip the machine forwards, place a vessel under
the level plug (2) and remove the filler plug (1)
and the level plug (2)
3.Allow the oil to drain into the vessel, right the
machine and park it on even ground.
4.Refill using new oil of the same type as that in
the engine in the filler hole until it runs over
from the level plug. Volume 0.15 liters.
5.Replace the level and filler plugs. Tighten them
moderately.
8011-055
IMPORTANT INFORMATION
Used engine oil is a health hazard and
legislation prohibits disposal on the ground
or in nature; it should always be disposed of
at a workshop or appropriate disposal
location. Avoid skin contact; wash with soap
and water in case of spills.
6.Wipe up any spilled oil.
Checking the gearbox oil level
Make sure the machine is parked on even ground
and that the engine is not running. Carefully remove
the level plug (2) and check that oil drains out. If
there is no oil leakage, the machine can be
carefully tipped forward to estimate the oil level. If
necessary, fill the oil in the filler plug hole (1) until it
runs over from the level plug.
Replace the level and filler plugs. Tighten
moderately.
English – 35
36 – English
TROUBLESHOOTING
SymptomCauseAction
The engine will not start
• User errorFuel valve closed.Open the fuel valve.
Choke valve open.Close the choke with cold
engine.
Engine switch in OFF position.Turn the engine switch to ON.
• Fuel systemFuel tank empty.Fill with fuel.
Machine stored withoutClean tank, sludge reservoir and
observing proper procedureempty carburetor.
from chapter ”Storage/WinterFill the tank with fresh fuel.
storage”
Contamination, water or ice inClean tank, sludge reservoir,
fuel system.fuel lines and carburetor. Fill
the tank with fresh fuel.
Carburetor problems.Contact an authorized service
workshop.
• Spark plugWrong spark plug type.Replace the spark plug.
Build-up on electrodes.Check electrode gap and clean or
Short circuit.replace spark plug.
Gasoline or oil on the spark plug.Clean the spark plug. Air the
engine out. Start with full throttle.
• No spark afterFaulty engine switch, cableContact an authorized service
checking spark plugor ignition.workshop.
• Low compressionSerious interior engineContact an authorized service
damage or faulty valves.workshop.
Engine is gutless or runs unevenly
• Air filterClogged air filter.Clean or replace the air filter.
• Fuel systemMachine stored without observ-Clean tank, sludge reservoir and
ing proper procedure fromempty carburetor.
chapter ”Storage/Winter storage”Fill the tank with fresh fuel.
(Blue exhaust)Tank filled with 2-cycle mixed oil.Fill the tank with proper fuel.
(Voluminous blue-whiteTank filled with diesel.Clean tank, sludge reservoir
exhaust)and empty carburetor.
Fill the tank with proper fuel.
(Black exhaust)Choke left on.Open choke valve.
Clogged air filter.Clean or replace the air filter.
Carburetor problems.Contact an authorized service
workshop.
• Ignition systemWrong spark plug type.Replace the spark plug.
Build-up on electrodes.Check electrode gap and clean or
Short circuit.replace spark plug.
Faulty ignition unit.Contact an authorized service
workshop.
• Low compressionSerious interior engine damageContact an authorized service
(possible blueor faulty valve.workshop.
exhaust)
English – 37
Winter storage
STORAGE
At the end of the season, the machine should be
readied for storage (or if it will not be in use for
longer than 30 days). Fuel allowed to stand for long
periods of time (30 days or more) can leave sticky
residues that can plug the carburetor and disrupt
engine function.
Fuel stabilizers are an acceptable option as regards
sticky residues during storage. If alkylate gasoline
(Aspen) is used, stabilizers are unnecessary
because this fuel is stable. However, you should
avoid switching between regular and alkylate
gasoline as sensitive rubber components can
harden. Add stabilizer to the fuel in the tank or in
the storage container. Always use the mixing ratios
specified by the manufacturer of the stabilizer. Run
the engine for at least 10 minutes after adding the
stabilizer so that it reaches the carburetor. Do not
empty the fuel tank and the carburetor if you have
added stabilizer.
WARNING!
Never store an engine with fuel in
the tank indoors or in poorly
ventilated spaces where fuel vapor
can come in contact with open
flame, sparks or a pilot light
such as in a boiler, hot water tank,
clothing drier, etc. Handle the fuel
with caution. It is very flammable
and careless use can cause
serious damage to person and
property. Drain the fuel into an
approved container outdoors and
far away from open flame. Never
use gasoline for cleaning. Use a
degreaser and warm water instead.
To ready the machine for storage, follow these
steps:
1.Clean the machine carefully, particularly the
chassis and working equipment. Mend damage
to the paint to prevent rust.
2.Inspect the machine for worn or damaged parts
and tighten any nuts or bolts that may have
become loose.
3.Change the engine oil; dispose of properly.
4.Open the fuel valve. Empty the fuel tank (1)
and the carburetor (2).
8011-048
5.Close the fuel valve.
6.Remove the spark plug and pour about a
tablespoon of engine oil in the cylinder. Turn
over the engine so that the oil is evenly
distributed and then refit the spark plug.
Put the engine in the compression phase where
the triangle mark on the sleeve of the starter is
aligned with the upper hole in the starter.
Note: Compression phase occurs every
second revolution.
Service
When ordering spare parts, please specify the
purchase year, model, type, and serial number.
Always use genuine Husqvarna spare parts.
An annual check-up at an authorized service
workshop is a good way to ensure that your machine
performs its best the following season.
38 – English
8011-049
7.Lubricate all grease nipples, joints and shafts
as described in the chapter ”Lubrication/
Lubrication schedule”.
8.Store the machine in a clean, dry place and
cover it for extra protection.
TECHNICAL DATA
SpecificationsDT18CDT18
EngineHonda GX120Honda GX160
Cylinder volume119 cm3 (7.3 cu in)163 cm3 (9.9 cu in)
Power4 hp (3 kW) at 3600 RPM5.5 hp (4 kW) at 3600 RPM
Torque7.4 Nm at 2500 RPM10.8 Nm at 2500 RPM
Spark plugNGK BPR6ESNGK BPR6ES
DENSO W20EPR-UDENSO W20EPR-U
Reduction gear1:6 (special design)Fuel volume2.5 liters/0.66 US Gal3.6 liters/0.95 US Gal
Primary driveOne V-belt (B-34")One V-belt (B-34")
Dethatching breadth45.7 cm (18")45.7 cm (18")
Clutch controlHandle-mounted withHandle-mounted with
automatic safety declutchingautomatic safety declutching
ClutchBelt tightener with spring return andBelt tightener with spring return and
mechanismidling pulleyidling pulley
Seeding breadth45.7 cm (18")45.7 cm (18")
Depth settingAdjustable depth control withAdjustable depth control with
lever mechanism with lock and stoplever mechanism with lock and stop
Flail blade reel52 case-hardened steel blades with 1.6 cm 52 case-hardened steel blades with 1.6 cm
(5/8") spacers(5/8") spacers
0.3 x 2.5 x 8.9 cm (1/8" x 1" x 3 1/2")0.3 x 2.5 x 8.9 cm (1/8" x 1" x 3 1/2")
Weight57.6 kg (127 lbs)Dethatcher 65.3 kg (144 lbs)
with seed hopper 74.8 kg (165 lbs)
with catcher bag 71.2 kg (157 lbs)
Width67.3 cm (26")71 cm (28")
Length50 cm (20") without handle68 cm (26 3/4") without handle
94 cm (37") with handle127 cm (50") with handle
Height59 cm (23 1/4") without handle61 cm (24") without handle
107 cm (41") with handle102 cm (40") with handle
Distance between axles 31 cm (12 1/4") center to center45 cm (17 3/4") center to center
Bearings3/4" closed flanged cartridge3/4" closed flanged cartridge
WheelsFront 8" x 1 3/4"Front 8" x 1 3/4"
Back 8" x 1 3/4"Back 10" x 2 3/4" catcher bag
Back 10" x 1 3/4" seed hopper
English – 39
WIRING DIAGRAM
8011-287
1.Engine switch
2.Transistor ignition unit
3.Spark plug
4.Oil level meter
40 – English
8011-050
Legend for color abbreviations in wiring diagram
RD=Red
SV=Black
GL=Yellow
English – 41
ASSEMBLY INSTRUCTIONS
Assembly directions, catcher bag
DT18
(P/N 540000061)
1.
Remove both back wheels (F), the wheel plate (E)
with accessories. Remove the guard (B), the
neoprene deflector (C) and the deflector strap (D)
by removing the ten (6 + 4) slotted screws.
with three 1/4"-20 round head screws (H)
above and two 1/4"-20 hex bolts (J) on the
side (see illustration). It is easier if you remove
the clutch cable adjustment unit.
B)Refit the wheels with the catcher tray wheel
plate (I).
C) Fit the catcher plate to the machine by
inserting the hooks from the plate into the
catcher bag wheel plate.
D) Fit the catcher bag to the frame as follows:
•Affix the bag’s plastic rails to the frame.
8011-011
G.Chute assembly
H.1/4"-20 round head screws
I.Wheel plate for catcher bag
J.1/4"-20X 5/8" hex bolt
•Thread the upper portion of the bag between
the two struts on the upper portion of the frame
and affix the bag to the front edge of the frame.
•Press on the snaps, one on each side.
42 – English
8011-283
8011-284
ASSEMBLY INSTRUCTIONS
Assembly directions, seed hopper SD18
(P/N 540000060)
1.
Remove both back wheels (E), the wheel plate and
accessories. Remove the guard (B), the neoprene
deflector (C) and the deflector strap (D) by
removing the ten (6 + 4) slotted screws (A).
2.
A) Fit the bearing and bearing flanges (Q) from
the inside of the machine with setscrews and
nuts (see illustration). The bearings should be
turned with the flat edge inwards. Do not
tighten the nuts until the wheel axle has been
assembled.
neoprene deflector (P), deflector strap (O), dial
bracket (N) and dial (M) (see illustration). Use
four 1/4" x 1" long screws (L) along the
deflector strap (O) and three 1/4" x 5/8" long
screws on the upper mounting above the
deflector strap. Make sure that the control
cable (G) is not trapped between the hopper
and the rear deck plate when assembling.
C) Replace the handle.
D) When the seed hopper is fit the first time, it is
much easier to thread the hole in the agitator
(F) before fitting the agitator. Use the
accompanying screw (V).
E) Thread the axle (T) through the bearing (Q),
the seed hopper (H), the agitator (F) and the
second bearing (Q) (see illustration). Tighten
the bearing screws that have been left loose
since point B.
F)Fit the agitator (F) on the axle (T) by aligning
the hole in the agitator with the hole in the axle
and attach using a #8-32 screw (V).
G) Fit the two bearing collars (R) on the axle. Turn
them with the smooth side outwards towards
the wheels. Lock each of the bearings (Q) on
the axle (T) using the provided bearing collar
(R) by rotating the bearing until it is locked in
place. Tighten the set screw on the bearing
collar.
H) Affix the left wheel (S) to the axle (T) with the
3.
Adapt the handle for assembly of the control lever
mounting by drilling two holes in the handle (see
illustration).
4.
Fit the seed control lever on the handle with the
accompanying 1/4" hex screws (Z), washers (Y)
and hex nuts (W). Affix the cable to the handle in
three places using the cable brackets (X) (see
illustration). Affix the open/close decal (Å) on the
handle beside the lever (see illustration).
Fit the hooks from the plate in the tracks at the back
of the machine. Press the plate down in the tracks.
Lift the end of the plate about 45°. The hooks at the
front of the plate glide down into the keyhole.
Catcher bag
Insert the catcher bag into the underside of the
handle and place it on the catcher plate.
Most damage to the collector plate results from
incorrect assembly on the frame. See ”Assembly
instructions\Assembly directions, collector bag”.
Correct height setting
8011-003
8011-249
The thatch collected will be thrown into the catcher
by the force arising from the flail blades combing
through the grass. The blades may not strike the
soil. If the blades come in contact with the soil, they
will claw, which results in ineffective dethatching.
Collection conditions
One achieves best results if the lawn is short and
dry. Wet lawns make collection less effective. If the
grass is long, one may end up pulling and tearing at
the lawn. If the layer of thatch is thick, Husqvarna
recommends going over the lawn first in one
direction and then again in a perpendicular
direction. A thick layer of thatch may have formed
over several years, and the lawn may need combing
2-3 times before it is removed completely. Do not
attempt to remedy a major problem by combing the
lawn just once.
Maintenance
Check prior to use that the catcher is properly
assembled and that the bag is not damaged. See
”Assembly instructions\Assembly directions,
collector bag”.
8011-023
WARNING!
Make sure that the catcher bag
does not press against the clutch
bar.
This can occur, particularly if the
catcher bag is mounted incorrectly.
Clean the equipment after use.
English – 45
46 – English
SERVICE JOURNAL
Action
Delivery service
1.Break the packaging and make sure the machine has not been
damaged in transport.