McCulloch 964830401 Every 2-3 hours of use, Chain sharpening When necessary, Every 30 hours use

Every 2-3 hours of use

Check the bar condition, if necessary clean the lubrication holes (fig.5) and the guide grooves (fig.6) carefully; If the groove is worn or shows signs of deep notching, it must be replaced. Clean the sprocket regularly and check that it has not been subject to excess wear (fig.7). Lubricate the nose sprocket with bearing grease through the hole shown in the illustration (fig.8).

Chain sharpening (When necessary)

If the chain does not cut correctly, or requires hard bar pressure against the wood, and if the sawdust is very fine, this is a sign that it is not sharpened correctly. If the cutting action produces no sawdust, this means the cutting edge has been worn completely and the chain is pulverising the wood during cutting. A well- sharpened chain crosses through the wood without effort or pressure and produces large long wood shavings.

The cutting side of the chain is composed of the cutting link (fig.9) with a cutting tooth (fig.10) and a cutting limit gauge (fig.11). The difference between these determines the cutting depth; a file guide and a 4mm diameter round file are needed to obtain good sharpening results; Follow the instructions below: Once the chain has been mounted and the tension is correctly adjusted, and the chain brake is activated, position the file guide

perpendicular to the bar as shown in the illustration (fig.12), filing the cutting teeth at the angle shown (fig.13), always working from the interior towards the exterior, lessening the pressure during the return stage (it is very important to follow the instructions perfectly: excessive or insufficient sharpening angles or an incorrect file diameter will increase the risk of kickback.) To obtain higher precision on side angles, it is advisable to position the file so that it exceeds the upper cutter by about

0.5mm. File all the teeth on one side first, then turn the machine over and repeat the operation. Make sure that after sharpening operations, all teeth are the same length and that the height of the depth gauge is 0.6 mm lower than the upper cutter: check the height using a proper template and file (with a flat file) all protruding parts, rounding off the front part of the depth gauge (fig.14), paying attention to not file the kickback protection tooth (fig.15)

Every 30 hours use.

Take the machine to the Authorised Service Centre for general revision and control check on brake components.

H. CUTTING TECHNIQUES 1,2,3,4,5,6,7,8,9,10,11,12,13,14

(fig.1) When using the machine, prevent:

-cutting in conditions where the trunk could split during cutting (wood under pressure, dry dead trees, etc): sudden splitting can be very dangerous.

-the bar or the chain from becoming blocked in the cutting notch: if this should occur, disconnect the machine from the main electricity supply and try to raise the trunk using an appropriate tool as a lever; do not attempt to free the machine by shaking or pulling as this could cause damage or injury.

-situations that can lead to kickback reactions.

-using the product above shoulder height

-cutting wood with foreign objects e.g. nails

(fig.1) During machine use:

-When cutting on sloping ground, always work uphill of the trunk to avoid being hit if the trunk should roll downhill.

-When felling trees, always finish the job: a partially cut tree could break and fall.

-At the end of each cutting operation the user will notice a considerable change in the strength necessary for controlling the machine. Great care must be taken not to loose control.

Below is a description of two different types of

cutting operation:

Cutting action by pulling the chain (from top to bottom) (fig.2) can lead to dangerous sudden movement of the machine towards the trunk with consequential loss of control. Where possible, use the spiked bumper during cutting operations.

Cutting action pushing the chain (from bottom to top) (fig.3) will lead to the danger of a sudden movement of the machine in the direction of the user, with the risk of hitting the user, or an impact of the “kickback danger zone” on the trunk resulting in strong kickback; extreme care must be taken when cutting in this manner.

The safest method for using the machine, is to block the log on a sawhorse, cutting from top to bottom, on the portion outside the sawhorse. (fig.4)

Spiked bumper use.

Where possible, use the spiked bumper to ensure safer cutting action: plant it in the bark or surface of the trunk in order to maintain more control over the machine.

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