Manual Husqvarna 445e II (page 35 of 120) (English, Portuguese, Spanish)

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To adjust the tension of the saw chain

WARNING: A saw chain with an incorrect

tension can come loose from the guide bar

and cause serious injury or death.

A saw chain becomes longer when you use it. Adjust the

saw chain regularly.

1. Loosen the bar nuts that hold the clutch cover/chain

brake. Use a wrench. (Fig. 123)

Note: Some models have only one bar nut.

2. Tighten the bar nuts by hand as tightly as you can.

3. Lift the front of the guide bar and turn the chain

tensioning screw. Use a wrench.

4. Tighten the saw chain until it is tight against the

guide bar but still can move easily. (Fig. 124)

5. Tighten the bar nuts using the wrench and lift the

front of the guide bar at the same time.

6. Make sure you can pull the saw chain around freely

by hand and that it does not hang from the guide

bar. (Fig. 125)

Note: Refer to

Product overview on page 19

for the

position of the chain tensioning screw on your product.

To do a check of the saw chain

lubrication

1. Start the product and let it operate at ¾ throttle. Hold

the bar approximately 20 cm/8 in above a surface of

light color.

2. If the saw chain lubrication is correct, you see a clear

line of oil on the surface after 1 minute. (Fig. 126)

3. If the saw chain lubrication does not operate

correctly, do a check of the guide bar. Refer to

To do

a check of the guide bar on page 35

for

instructions. Speak to your servicing dealer if the

maintenance steps does not help.

To do a check of the spur sprocket

The clutch drum has a spur sprocket that is welded on

the clutch drum.

(Fig. 127)

• Regularly do a visual check of the degree of wear on

the spur sprocket. Replace the clutch drum with the

spur sprocket if there is too much wear.

To lubricate the needle bearing

1. Pull the front hand guard rearward to disengage the

chain brake.

2. Loosen the bar nuts and remove the clutch cover.

Note:

Some models have only one bar nut.

3. Put the product on a stable surface with the clutch

drum up.

4. Lubricate the needle bearing with a grease gun. Use

engine oil or a bearing grease of high quality. (Fig.

128)

To examine the cutting equipment

1. Make sure that there are no cracks in rivets and links

and that no rivets are loose. Replace if it is

necessary. (Fig. 129)

2. Make sure that the saw chain is easy to bend.

Replace the saw chain if it is rigid.

3. Compare the saw chain with a new saw chain to

examine if the rivets and links are worn.

4. Replace the saw chain when the longest part of the

cutting tooth is less than 4 mm/0.16 in. Also replace

the saw chain if there are cracks on the cutters. (Fig.

130)

To do a check of the guide bar

1. Make sure that the oil channel is not blocked. Clean

if it is necessary. (Fig. 131)

2. Examine if there are burrs on the edges of the guide

bar. Remove the burrs using a file. (Fig. 132)

3. Clean the groove in the guide bar. (Fig. 133)

4. Examine the groove in the guide bar for wear.

Replace the guide bar if it is necessary. (Fig. 134)

5. Examine if the guide bar tip is rough or very worn.

(Fig. 135)

6. Make sure that the bar tip sprocket turns freely and

that the lubricating hole in the bar tip sprocket is not

blocked. Clean and lubricate if it is necessary. (Fig.

136)

7. Turn the guide bar daily to extend its life cycle. (Fig.

137)

To do maintenance on the fuel tank

and the chain oil tank

• Drain and clean the fuel tank and the chain oil tank

regularly.

• Replace the fuel filter yearly or more frequently if

necessary.

CAUTION: Contamination in the tanks

causes malfunction.

Air cleaning system

AirInjection

™

is a centrifugal air cleaning system that

removes dust and dirt before the particles are caught by

the air filter. AirInjection

™

extends the life of the air filter

and the engine.

(Fig. 138)

1286 - 002 - 03.06.2020

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Husqvarna 445e II Manual

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