Adjusting The Chain Tension - Toro 51850 Manuel De L'utilisateur

Adjusting the Chain
Tension
Service Interval: Before each use or daily
After each battery drain cycle
Ensure that the chain is properly tensioned.
A loose chain shortens the life of the drive sprocket
and the guide bar and may cause the chain to fall off.
An overtightened chain overheats the guide bar and
chain, causing rapid wear, and may burn out the motor
or break the chain.
The chain tension is correct when you are able to use
a gloved hand to pull the chain smoothly around the
guide bar. The chain should remain in contact with
the bottom edge of the guide bar.
Also, check the chain tension of a new chain after a
few cuts; a new chain usually stretches and requires
adjustment after a few cuts.
DANGER
Contact with the chain saw teeth can cause
serious personal injury.
• Remove the battery pack before adjusting
or maintaining the chain saw.
• Always wear gloves when adjusting or
maintaining the chain saw.
1. Place the chain saw on a level surface and
remove the battery pack; refer to
Battery Pack (page
2. Allow the saw chain to cool.
Important:
Do not tension a hot chain; it
may contract as it cools, resulting in an
overtightened chain.
3. Inspect the guide bar for bends or damage,
replace if necessary.
4. Ensure that the chain brake is in the O
position (Figure 28).
5. Using the onboard multitool, loosen the captive
nuts on the side cover, but do not remove it
(Figure 31).
Removing the
17).
PERATING
6. Hold up the tip of the guide bar
7. Using the onboard multitool, adjust the chain
tension, and then secure the side cover to the
chain saw by tightening the captive nuts
31).
•
To tighten the chain, turn the chain
tensioning screw clockwise
•
To loosen the chain, turn the chain
tensioning screw counterclockwise
Adjust the chain tension until the chain touches
the bottom edge of the guide bar, then pull the
chain away from the bottom edge of the guide
bar; a properly adjusted chain can only be pulled
3.2 to 6.4 mm (1/8 to 1/4 inch) away from the
guide bar, and snaps back on release.
If the chain is not properly tensioned, loosen the
side cover and repeat steps
8. Use a gloved hand to pull the chain around the
guide bar. A properly tensioned chain should
move smoothly and remain in contact with the
bottom edge of the guide bar.
9. Check the chain tension again and repeat this
procedure if necessary.
21
(Figure
Figure 30
(Figure
5 through 7.
30).
g315842
(Figure
30).