Husqvarna 128PS Operator's Manual page 17

3. Loosen the bar nut (A), and then tighten it with
your fingers.
B
4. Move the adjustment screw (B) clockwise until
the chain touches the bottom of the guide bar
rail. And move the adjustment screw clockwise
1/4 turn.
5. Move the chain around the guide bar to make
sure that all drive links stay in the bar groove.
6. Lift the top of the guide bar, and tighten the bar
nut with the bar tool.
7. Make sure that you can move the chain around
the guide bar with the screwdriver end of the bar
tool.
8. Loosen the bar nut lightly, and loosen the
adjustment screw counterclockwise 1/4 turn if
you cannot move the chain. Tighten the bar nut.
9. Tighten the adjustment screw clockwise 1/4 turn
if the chain stays loose and hangs below the
guide bar.
To replace the chain
WARNING:
becomes worn or damaged, replace it
with the low kickback chain.
1. Disconnect the spark plug.
2. Remove the bar nuts and the clutch cover.
3. Turn the adjustment screw counterclockwise by
hand until the adjustment pin is located between
the two indicator marks on the clutch cover.
4. Move the guide bar behind the sprocket until the
guide bar stops against the sprocket. Remove
the chain.
1780 - 001 - 08.02.2022
A
When the chain
5. Hold the new chain with the drive links .
6. Put the new chain above and behind the clutch
drum. Set the drive links in the clutch drum
sprocket.
7. Keep the bottom of the drive links between the
teeth of the sprocket in the nose of the guide bar.
8. Set the drive links into the bar groove.
9. Pull the guide bar forward until the new chain
sets in the bar groove.
10. Install the clutch cover.
11. Set the adjustment pin in the lower hole of the
guide bar.
12. Install the bar nuts and tighten them with your
hand.
13. Adjust the chain tension
tension on page 16 and tighten fully the bar nuts.
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.
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.
To adjust the chain
17