BorMann PRO BBP3980 Manuel D'instructions page 10

EN
4. Place the sprocket cover on the chain saw and matching the two log boss on the cover to the two corresponding holes, as shown below. (Fig. 11)
5. Turn the lever clockwise until the sprocket cover is firmly secured then return it to the original position. (Fig. 12)
XIV. Adjusting saw chain tension
• Carry out the procedure of installing or removing saw chain in a clean place free from sawdust and the like.
• Do not tighten the saw chain too much. Excessively high tension of saw chain may cause breakage of saw chain, wear of the guide bar and
breakage of the adjusting dial.
• A chain which is too loose can jump off the bar and it may cause an injury accident.
The saw chain may become loose after many hours of use. From time to time check the saw chain tension before use.
1. Pull the lever up while pressing its edge. Turn it counterclockwise a little bit to loosen sprocket cover lightly. (Fig 13 )
2. Adjust the chain tension. Turn the chain head screw clockwise to tighten, turn it counter-clockwise to loosen. To check the suitable saw chain tension, pull
the saw chain by the force of about 1kg, if there's distance 3-4mm between the centre of the lower side of the guide bar and the saw chain as shown in below,
the tension is suitable. (Fig.14)
3. Turn the lever clockwise until the sprocket cover is secured then return it to the original position.(Fig.15)
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1. Log boss 1 2. Hole 1 3. Log boss 2 4. Hole 2
(Fig.12)
1. Lever
(Fig.13)
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1. Chain head screw (Fig.14)
(Fig.11)
(Fig.15)