Efco 147 Instruction Manual download pdf (Page 30)

MAINTENANCE

Chain Maintenance

Use only Dual Raker low-kickback chain on this saw. This

fast-cutting chain will provide kickback reduction when properly

maintained.

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. 74): 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 repla-

cing the chain. If signs of wear or damage are present in the areas

indicated in Fig. 75, have the rim sprocket replaced by a Servicing

Dealer.

How to Sharpen the Cutters (Fig. 76)

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

mid-point of the bar. See Operation-Chain Tension.

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. 77. 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. 78. Lift file away from the steel on

each return stroke.

5 Put a few firm strokes on every tooth. File all left hand cutters

(E, Fig. 79) 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.

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Efco 147 Instruction Manual Page 30

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