Efco MTTH 2400 50359002E5 Инструкция онлайн [54/460] 830657

4. Bring the chain tensioner pawl (D, Fig. 5) to the limit switch, fully unscrewing the chain

tensioner screw (L).

5. Insert the bar (F, Fig. 5) on the stud (N).

6. Fit the chain (H, Fig. 6) inside the sprocket (E) and the bar guide (M). Pay attention to the

direction of rotation of the chain (Fig. 8).

7. Rest the chain guard, inserting it into the appropriate housing and, keeping it pressed

against the bar, screw the chain tensioner screw (L, Fig. 7), so that the pawl (D, Fig. 5) enters

the hole (G) of the bar.

8. Fit the chain guard and respective nuts without tightening them.

9. Tension the chain using the chain tensioner screw (L, Fig. 7).

10. Fully tighten the chain guard fixing nut while keeping the tip of the bar raised (Fig. 9). The

tightening torque is 1.5 kgm (15 Nm). The chain must be adjusted so that it is taut and can

slide easily by hand (Fig. 10).

11. The chain is correctly tensioned when it can be raised a few millimeters by pulling it

upwards (Fig. 10).

WARNING

Always maintain the correct chain tension. An excessively slack chain increases the

risk of kickback and the chain may ride out of the bar channel; these events can

cause injury to the operator and damage to the chain. An excessively slack chain

will result in rapid wear of chain, bar and pinion. On the contrary, an overtensioned

chain will tend to overload the engine with resulting damage. A correctly tensioned

chain provides the best cutting characteristics, optimal safety, and long working life

of the chain. The working life of the chain depends on correct tensioning and

correct lubrication.

5.2 BUCKING TOOTH

A bucking tooth is available as an option.

Using the bucking tooth is highly recommended when cutting thick logs or branches.

To assemble the bucking tooth, see sequence A-F Fig. 28.

6 SAFETY DEVICES ON THE UNIT

WARNING

The chainsaw is equipped with safety devices that reduce the risks deriving from

the use of the saw itself; the operator must know their position, use and

maintenance interventions.

WARNING

Read the following warnings before using the unit.

• Do not use the chainsaw with defective safety devices.

• Check the safety devices regularly. See chapter 9.1 SAFETY CHECKS.