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. The dethatcher is used to 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.
Used in this publication to notify the reader of a risk of personal injury, particularly if the reader DOES NOT follow the instructions given in the manual. Decals and machine-bound instructions . Husqvarna logo 2. Model designation DT22 3. Height adjust 4. Seeder Dial 5. DANGER watch your feet 6.
SYMBOLS AND DECALS Translation of instructions Decal 6 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 1/2" lower than you normally would.
SAFETY INSTRUCTIONS General use The object of this manual is to help you use your Husqvarna machine safely and to give you information about how to maintain your machine. Please read the manual carefully before attempting to use the machine.
Operating • Do not use the machine on grades of more than 20°. We recommend working across slopes rather than up and down. This will yield a more even result. Do not leave the machine standing on a slope unattended. •...
SAFETY INSTRUCTIONS Children Serious accidents can occur if you fail to be on guard for children in the vicinity of the machine. Never assume that children will stay put where you last saw them. • Keep children away from the machine. •...
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. •...
The machine is equipped with a 5.5 hp Honda or 5.5 hp Briggs & Stratton, four-cycle engine. The 22 " dethatcher can be equipped with a catcher. It is available as an accessory at your Husqvarna dealer. It can be mounted after purchase. Alternatively, the 22" dethatcher can be equipped with a seeder.
Engine Refer to your engine manual. 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. Blades should penetrate the soil to a depth of 1/8" to 1/4"...
Blade versatility Flail blade Thatch is the dense layer of clippings, roots and stems that forms between the soil and the base of the grass. As thatch builds up, it prevents water, air and fertilizer from being absorbed into the soil. This causes shallow root development leading to vulnerability to drought and frost.
Before you start • Mow the lawn 1/2" shorter than normal. • Allow the lawn to dry. Wet conditions can cause extensive damage to healthy grass. FLAIL BLADES OR SPRING TINES: • Flail Blades or Spring Tines: Set blade or tine depth so that the blades or tines just touch on a flat surface such as a sidewalk or driveway.
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. Maintenance Check the engine oil level Replace engine oil Check the air filter Clean the air filter Replace air filter cartridge Clean sludge reservoir for fuel system...
Cutting unit Checking the drive belt 1. Allow the engine to cool. 2. Remove the spark plug cable. 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;...
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).
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 e-rings (1) (locking washer type) that hold the blade shaft (2) in place (see the illustration).
Wear/Replacing delta blades Over time and due to wear, the blades will diminish in length. Once the blades have worn down by about 3/4", the overall length of the blade at the longest point of the blade will be about 2 1/2", and it will be necessary to replace the blades.
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.
Lubrication schedule 1. Check engine oil daily, change every six months or 100 hours. 2. Check and lubricate wheel bearings once a month. 3. Lubricate folding handle points once a week. General Stop the engine and remove the ignition cable before attempting to lubricate the machine. Wipe away excessive grease after lubrication.
LUBRICATION 1. Blades Cover the blades with a thin coat of oil to avoid rust. This is particularly important prior to winter storage or if the machine will not be used for a period of longer than 30 days. JOINT 2.
TROUBLESHOOTING Symptom Cause The engine will not start • User error Fuel valve closed. Choke valve open. Engine switch in OFF position. • Fuel system Fuel tank empty. Machine stored without observing proper procedure from chapter ”Storage/Winter storage” Contamination, water or ice in fuel system.
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.
ASSEMBLY INSTRUCTIONS Assembly – delivery service 1. Rotate the handle and tighten it in place. 2. Fill the engine with the manufacturer-recommended oil. See section ”Lubrication/Engine oil”. 3. Test the clutch. Make sure that the clutch expansion spring disengages easily. 4.
Action Delivery service Break the packaging and make sure the machine has not been damaged in transport. Where applicable, assembly accompanying components. Check that the machine design corresponds to the customer order. Check that the right amount of oil is in the engine and transmission.
SERVICE JOURNAL Date, stamp, signature Action...