Efco MT4400 Manuel d'instructions télécharger pdf (Page 15)

ASSEMBLY

Assembling the Bar and Chain

WARNING: Check the chain tension frequently when

operating the chain saw. Never touch or adjust the

chain while the engine is running. The saw chain is

very sharp, always wear protective gloves when

performing maintenance to the chain.

1 Ensure that the chain brake is not set by pulling the chain

brake lever / hand guard towards the front handle as shown in

Fig. 20. Refer to Safety-Chain Brake and Operation-Chain

Brake Sections for additional information.

2. Remove the two (2) bar nuts (A, Fig. 21) and the clutch cover

(B).

3. Remove and discard the plastic shipping spacer (C, Fig. 22)

that has been installed on the bar studs in place of the bar

for shipping purposes.

4. Adjust the chain tensioning pin (D) fully towards the brake

band by turning the chain tensioning screw (E) counterclockwise

as shown in inset Fig. 22.

5. The guide bar (F) contains a bar stud slot that fits over the bar

studs (G). The guide bar also contains two chain tensioning

pin holes (H) and two lubrication holes, one per side. The bar

is reversible and either tensioning pin hole may be utilized with

the chain tensioning pin.

6. Place the guide bar (F) onto the bar studs (G) as shown in

Fig. 22.

7. Position the guide bar (F) tip through the chain (H) loop as

shown in Fig. 23. The cutters on the top of the guide bar

should face toward the bar tip, in the direction of the chain

rotation. See inset (M) of Fig. 24.

8. Fit the chain (H) over the rim sprocket (I) and into bar groove.

CAUTION: Severe damage can occur to the rim

sprocket, clutch drum, guide bar and chain, if the

chain is not correctly seated into the rim sprocket.

9. Replace the clutch cover (B). Turn the chain tensioning screw

(E) clockwise (as shown in Fig. 25, pag. 16) until the chain

tensioning pin (D) fits into the chain tensioning pin hole (H).

Install the two bar nuts (A). Tighten the bar nuts finger tight

only. The bar must be free to move for tension adjustment.

CAUTION: Failure to ensure that the chain tensioning

pin is in the chain tensioning pin hole will result in

severe damage to the chain saw during reassembly

of the clutch cover.

NOTE: If the clutch cover does not slide on freely, check that

the chain brake is not engaged. To disengage chain brake

with clutch cover removed, grasp clutch cover as shown in

Fig. 20 and pull back on chain brake lever / hand guard.

10. Remove all slack from chain by turning the chain tensioning

screw (E) clockwise, assuring that the chain seats into the

bar groove during tensioning (Fig. 25, pag. 16).

11. Lift the tip of the guide bar up to check for sag, see Fig. 26,

pag. 16. Release the tip of the guide bar, and turn the chain

tensioning screw (E) 1/2 turn clockwise. Repeat this process

until sag does not exist.

12. Hold the tip of the guide bar up and tighten the bar nuts

securely as shown in Fig. 27.

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Efco MT4400 Manuel d'instructions Page 15

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