UK
SAFETY CHAIN BRAKE | I |
Your chain saw is fitted with a safety chainbrake desi- gned to stop the chain in milliseconds in case of kick- back. Always hold the saw firmly in both hands.
The chain brake does not provide a total protection if the machine is used without taking the necessary precautions and maintenances.
The chain brake is intended to engage automatically in case of kickback.
The chain brake can also be engaged manually by pushing the chain brake lever forwards.The manual use of the chain brake is recommended only at idle.
Always test the chain brake before using your saw. Do this by engaging the brake at idle (see below).
Always release the brake before starting.
Kickback may occur if the end of the bar (see illustrated angle) touches any solid object.
Never attempt to start a cut with the end of the bar. Kickback is a violent upward and rearward movement of the bar and may cause you to lose control of the machine. Therefore you should avoid starting a cut with this part of the bar. Always keep a firm grip on the saw with both hands because, in case of kickback, it is the contact of the left hand with the brake lever which will help to engage the brake.
CHAIN BRAKE TESTING:
1The chain brake (A) is disengaged when brake lever is pulled back and locked(chain can move).
2The chain brake (A) is engaged when brake lever is in the position (chain cannot rotate).The chain brake should snap into both positions.If strong resistance is felt or lever does not move into either position, DO NOT USE YOUR SAW. Take it immediately to an authorized servicing dealer.
3CHAIN CATCHER
This unit is fitted with a chain catcher below the drive spocket. This is intended to stop the rearward movement of the chain in case of breakage or if it should come out of the bar. It should never be removed.
CHAIN SHARPENING | L |
1Chain cutter teeth can be sharpened with a round file, as follows:
CHAIN | FILE |
SPR 378 GX | 7/32” |
The exact chain type is marked on the bottom half of the drive link which runs inside the bar groove.
Filing can be made easier by also using a file holder. The chain can remain fitted on the bar during sharpening. Before commencing, the chain should be tensioned cor- rectly and the chain brake should be activated to prevent the chain from moving.
2To obtain a correct sharpening the file must be carefully held to maintain 3 basic angles:
– “A” Top angle | 30° - 35° |
– “B” External, side angle | 85° - 90° |
– “C” Internal, side angle | 60° |
File in one direction only, from the “inside” of the cutter tooth towards the “outside”.
Do not allow the file to touch the chain as you bring it back to
3The file should be held horizontally to the cutter tooth being sharpened.
4Best results to obtain a precise sideways angle can be obtained by holding the file so that it rises 0,5 mm above the top face of the cutter tooth.
5DEPTH GAUGE
Correct depth gauge height is vital to ensure maximum chain life and cutting efficiency.
The height of the depth gauge should be lowered as the cutter tooth is filed back; this height should be checked every 4 or 5 sharpenings.
The best way to do this is to use a flat file and a depth gauge tool.
The correct setting is 0.65 mm below the top edge of the cutter tooth.
The cutter tooth depth gauge should then be rounded (D).
FAULT FINDING TABLE
| Engine runs badly | Engine will not start | The machine runs |
| or looses power when cutting | but does not cut well | |
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Check STOP switch is in the position I. | • |
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Control fuel level min. 25% tank capacity. | • | • |
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Check air filter is clean. | • | • |
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Remove spark plug, dry it, clean it | • | • |
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and adjust it, and replace it, if necessary. |
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Control and adjust the carburetor screws if necessary. |
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Change fuel filter. Contact your dealer. |
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Carefully follow the cutting accessory assembly instructions. |
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Check chain is sharp. Otherwise, contact your dealer. |
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Engine still gives trouble: contact your dealer. |
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