Nakayama PRO EC2350, Manual

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8
Maintenance and repair
General behaviour
Always hold the chain saw firmly with both hands. Front grip with the left hand and rear grip with the right hand.
Fully grip both handles at all times during operation. Never operate chain saw using only one hand. Ensure power cord is located to the rear, away from the
chain and wood and so positioned that it will not be caught on branches or the like during cutting. Use the chain saw only with secure footing. Hold the chain
saw at the right-hand side of your body.
- The chain must be running at full speed before it makes contact with the wood. Use the metal gripping teeth to secure the saw onto the wood before starting
to cut. Use the spiked bumper (15) as a leverage point while cutting. Reset the gripping teeth at a low point when sawing thicker logs by pulling the chain saw
slightly backwards until the gripping teeth release, and reposition at lower level to continue sawing. Do not remove the saw completely from the wood.
- Do not force the chain while cutting, let the chain do the work, using the gripping teeth to apply minimal leverage pressure.
- Do not operate the chain saw with arms fully extended or attempt to saw areas which are difficult to reach, or on a ladder. Never use the chain saw above
shoulder height. Sawing is optimized when the chain speed remains steady during cutting.
- Beware when reaching the end of the cut. The weight of the saw may change unexpectedly as it cuts free from the wood. Accidents can occur to the legs and
feet. Always remove the saw from a wood cut while the saw is running.
Cutting logs
Observe the following safety instructions:
- Support logs so that the face sides at the cut do not close in against each other, which would result in the chain being jammed or pinched.
- Position and set short logs safety prior to sawing. Saw only wood or wooden objects. When sawing, always take care to avoid hitting stones, nails, ect, as these
could be thrown up or cause damage to the chain or serious injury to the operator or bystanders.
- Keep a running saw clear or wire fencing or the ground.
Use of the saw to thin out branches or bushes is not approved.
- Length cuts must be carried out with care, as leverage with the spiked bumper is not possible. Saw at a flat angle to avoid kickback.
- When working on a slope, operate above or to the side of the trunk or laying tree.
- Be careful not to trip over tree stumps, branches, roots, etc.
Cutting wood under tension
There is a high risk of accidents when sawing wood, branch or trees under tension. Be extremely careful. Leave saw jobs like these to professionals. When
sawing logs supported on both ends, start the cut from above(Y) about 1/3 of the diameter into the log and then finish the cut (Z) from below, in order to avoid
contact of the chain saw with the ground.
When sawing logs supported on only one end, start the cut from below (Y) about 1/3 of the diameter into the log and finish the cut from above (Z) in order to
avoid log splitting or jamming of the chain saw.
WARNING! Before any work on the machine itself, pull the mains plug from the socket. In order to ensure long and reliable service, carry out the following
maintenance regularly:
Regularly check for obvious defects such as loose, dislodged or damaged chain and guide bar, loose fixings and worn or damaged components.
- Check that covers and guards are undamaged and correctly fitted. Carry out necessary maintenance or repairs before using the chain saw.
- If the chain saw should happen to fail despite the care taken in manufacturing and testing, repair should be carried out by an authorized customer service
agent.
NOTE: Before returning, ensure all oil in the oil tank has been emptied.
Replacing/changing chain and guide bar
The circular groove of the guide bar will wear particularly on the lower edge with time. When replacing the chain turn the chain bar 180° to allow even wear,
thus extending chain bar life.
Check drive sprocket. If it is worn out or damaged due to strain, have it exchanged by an authorized service agent. If the chain bar is worn out or damaged,
have it exchanged by an authorized service agent.
Lubricating the drive sprocket
Unplug the chain saw from the power source.
NOTE: It is not necessary to remove the saw chain to lubricate the guide bar sprocket tip. Lubrication can be done on the job.
2). Clean the guide bar sprocket tip.
3). Using disposable lube gun, insert needle nose into the lubrication hole and inject grease until it appears at the outside edge of the sprocket tip.
4). Make sure that the chain brake is deactivated. Rotate the saw chain by hand. Repeat the lubrication procedure until the entire sprocket tip has been greased.
Cleaning the guide bar rails
1) Remove side cover, bar and chain.
2) Using a screwdriver, putty knife, wire brush or other similar instrument, clear residue from the rails on the guide bar. This will keep the oil passages open to
provide proper lubrication to the bar and chain.
3) Reinstall the bar, chain (and adjust tension), sprocket cover and bar bolt retaining nuts. (See Section Guide bar/saw chain installation).