GZ400
GB-12
3. Guide bar
When the guide bar is dismounted, remove sawdust in the bar
groove and the oiling port.
Grease the nose sprocket from the feeding port on the tip of
the bar.
4. Others
Check for fuel leakage and loose fastenings and damage to
major parts, especially handle joints and guide bar mounting.
If any defects are found, make sure to have them repaired
before operating the saw again.
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PERIODICAL SERVICE POINTS
1. Air cooling system
Dust clogging around the cooling system and the cylinder fins
will cause overheating of the engine. Periodically check and
clean the cooling system and the cylinder fins with a brush
after removing the cylinder cover, the air cleaner and the recoil
case. When installing the cylinder cover and the cooling sys-
tem, make sure that switch wires and grommets are positioned
correctly in place.
7. Maintenance
Oiling port
Sprocket
Oiling port
Before cleaning, the inspecting or repairing the unit,
make sure that engine has stopped and is cool.
Disconnect the spark plug to prevent accidental
starting.
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MAINTENANCE AFTER EACH USE
1. Air filter
Dust on the cleaner surface can be removed by tapping a
corner of the cleaner against a hard surface. To clean dirt in
the meshes, split the cleaner into halves and brush in gaso-
line. When using compressed air, blow from the inside.
To assemble the cleaner halves, press the rim until it clicks.
Note: When installing the main filter, make sure that the grooves on the
filter edge are correctly fit with the projections on the cylinder cover.
2. Oiling port
Dismount the guide bar and check the oiling port for clogging.
A log lying on the ground
Saw down halfway, then roll the log over and cut from
the opposite side.
A log hanging off the ground
In area A, saw up from the bottom one-third and finish
by sawing down from the top. In area B, saw down from
the top one-third and finish by sawing up from the bot-
tom.
Cutting the limbs of Fallen Tree
First check to which side the limb is bent. Then make
the initial cut from the bent side and finish by sawing
from the opposite side.
Be alert to the springing back of a cut limb.
Pruning of Standing Tree
Cut up from the bottom, finish down from the top.
• Do not use an unstable foothold or ladder.
• Do not overreach.
• Do not cut above shoulder height.
• Always use both your hands to hold the
saw.
Grease port
Fan cover
Fan
Cylinder fins
Cylinder cover
Recoil case
