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33
Saw Chain and Chain Bar (Chainsaw Attachment)
Ensure that the saw chain is correctly tensioned and the chain drive cover nuts are properly
tightened before use and during cutting. • The saw chain will "stretch" with use, so it is
important to
before and during use • The saw chain cutters are very sharp – wear
suitable protective gloves when handling the saw chain. • Use replacement parts from, or recommended by,
the manufacturer. • Always replace the saw chain and/or chain bar with replacements of the correct type
(see
). • Turn the chain bar over whenever the saw chain is changed or sharpened to help
prevent uneven wear on the chain bar. • It is recommended to have saw chains sharpened professionally.
Inspection and Cleaning
It is essential for efficient operation and safety that the saw chain and chain bar are properly maintained.
Replace the saw chain if it:
•
Shows signs of damage, such as broken or chipped cutters, damaged rivets, corrosion etc.
•
Can no longer be properly tensioned due to "stretch".
•
Can no longer be sharpened properly.
To clean the saw chain, soak it in a proprietary saw chain cleaning solution, solvent, or mixture of ammonia
and water for approximately 15 minutes to help remove dirt, grease and resin/sap. After soaking, brush the
saw chain thoroughly with a saw chain brush or stiff bristle wire brush to remove any stubborn particles, then
lubricate the chain. Replace the chain bar if it:
•
Shows signs of damage, such as bending, cracks, chips or corrosion.
•
The top edges of the chain bar groove become worn unevenly.
•
The depth of the saw chain groove is no longer deep enough for the saw chain to
seat correctly and run along the top edges of the chain bar groove.
To clean the chain bar, use a proprietary saw chain cleaning solution, solvent, or
mixture of ammonia and water to help remove dirt, grease and resin/sap, particularly
from within the saw chain groove (
A
) and the lubricant inlet hole (
B
). Use suitable tools
or objects to help dislodge any stubborn particles from within the saw chain groove.
Removal/Installation
1. Switch the engine OFF and ensure that the chain has stopped rotating.
2. Remove the chain drive cover nut (
D
), and remove the cover (
C
). Be careful to
prevent the chain bar falling out.
3. Lift the chain bar (
H
) so it is clear of the tensioner spigot (
E
) and chain drive cover stud (
F
).
4. Carefully extract the saw chain (
G
) from the chain bar groove and chain drive gear (
I
), then remove the
saw chain.
5. Remove any sawdust, wood particles, dirt etc from the chain drive cover, tension adjustment mechanism
and threads (
J
) – it is easy to damage the threads if adjustment is attempted on a dirty mechanism.
To install the saw chain, chain bar and chain drive cover, see
. To tension the saw chain, see
H
B
A
D
F
E
D
C
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