Husqvarna ST 224 Manual De Usuario página 17

Examine the muffler regularly to make sure that it is
attached correctly and not damaged.
CAUTION: The muffler becomes very hot
during and after use and when the engine
operates at idle speed. Be careful near
flammable materials and/or fumes to prevent
fire.
To examine the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 23 . (Fig. 69)
• Replace the spark plug if it is necessary.
To inspect the augers and the scraper
bar
1. Before each use, inspect the augers and the scraper
bar for wear.
2. If the edge of the scraper bar is worn, reverse the
scraper bar. If the scraper bar has damages or is
worn on both edges, replace it.
3. If the edges of the augers are worn, contact an
authorized service center to replace them.
To replace the auger shear pins
The auger shear pins protect the product from damage.
The auger shear pins break if an object comes into the
moving parts.
CAUTION: Use only original equipment
shear pins supplied with the product.
1. If an auger shear pin breaks, stop the engine and
wait for the moving parts to stop.
2. Remove the ON/OFF key and disconnect the spark
plug cable.
3. Align the hole in the auger hub (B) with the hole in
the auger shaft (C) and install a new ¼ - 20 x 2
shear pin (A)
4. Install a ¼-20 locknut (D) and tighten. (Fig. 70)
1481 - 003 - 11.05.2020
5. Put the ON/OFF key in the ignition and connect the
To replace the impeller shear pins
The impeller shear pins protect the product from
damage. The impeller shear pins break if an object
comes into the moving parts.
1. If an impeller shear pin breaks, stop the engine and
2. Remove the ON/OFF key and disconnect the spark
3. Align the hole in the impeller hub (A) with the holes
4. Install a ¼-20 locknut (D) on the shear pin and
5. Put the ON/OFF key in the ignition and connect the
To examine the tires
Technical data
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To clear a clogged discharge chute
deflector
Do not unclog the discharge chute deflector before the
following operations are made.
1. Release the auger engagement and the drive
2. Wait 10 seconds to make sure that the augers have
3. Stop the product.
4. Use the tool for cleaning (at least 37 cm (15 in.) long,
To replace the scraper bar
1. Put the scraper bar (A) in a reversed position when it
2. Replace the scraper bar if it is worn on both sides or
spark plug cable to the spark plug.
CAUTION: Use only original equipment
shear pins supplied with the product.
wait for the moving parts to stop.
plug cable.
in the impeller shaft (B) and install a new ¼-20 shear
pin (C).
tighten. (Fig. 71)
spark plug cable to the spark plug.
Keep the tires free of fuel, oil and chemicals to
prevent damage to the rubber.
Keep the tires away from stumps, stones, ruts, sharp
objects and other objects which can cause damage
to the tires.
Keep the tire pressure correct, see
on page 23 .
engagement at the same time.
stopped.
included in some models) to remove the clog.
WARNING: Do not put your hands into
the discharge chute deflector or inside
the auger bucket.
is worn to the edge of the housing. (Fig. 72)
if it is damaged.
Technical data
17