MAINTENANCE
en
76
77
78
79
80
81
Chain Maintenance
Use only Dual Raker
For smooth and fast cutting, raker chain needs to be maintained properly. The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of your chain, consider the following:
1.Improper filing angle of the side plate can increase the risk of a severe kickback.
2.Raker (depth gauge) clearance (A, Fig. 76): Too much increa- ses the potential for kickback; not enough decreases cutting ability.
3.If cutter teeth have hit hard objects such as nails and stones, or have been abraded by mud or sand on the wood, have Servicing Dealer sharpen chain.
4.In rare instances drive tangs could flare resulting in chain not rotating freely. Replace chain if necessary.
NOTE: Inspect the rim sprocket for wear or damage when replacing the chain. If signs of wear or damage are present in the areas indicated in Fig. 77, have the rim sprocket replaced by a Servicing Dealer.
How to Sharpen the Cutters (Fig. 78)
Be careful to file all cutters to the specified angles and to the same length, as fast cutting can be obtained only when all cutters are uniform.
1.Wear gloves for protection. Tighten the chain tension enough that the chain does not wobble. Do all of your filing at the
2.Use a 3/16" diameter round file and holder.
3.Keep the file level with the top plate of the tooth as shown in Fig. 79. Do not let the file dip or rock.
4.Using light but firm pressure, stroke towards the front corner of the tooth as shown in Fig. 80. Lift file away from the steel on each return stroke.
5Put a few firm strokes on every tooth. File all left hand cutters (E, Fig. 81) in one direction. Then move to the other side and file the right hand cutters (F) in the opposite direction. Occasionally remove filings from the file with a wire brush.
CAUTION: Dull or improperly sharpened chain can cause excessive engine speed during cutting which may result in severe engine damage.
WARNING: It is absolutely essential to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened – and in particu- lar if the depth gauge is set too low – there is a risk of increased kickback of the chainsaw, with resulting risk of injury.
Failure to replace or repair damaged chain can cause serious injury.
The saw chain is very sharp, always wear protective gloves when performing maintenance to the chain.
30