1.Blade sharpening

The accessory round file should be held against the chain blade so that one-fifth of its diameter extends above the top of the blade, as shown in Fig. 13. Sharpen the blades by keeping the round file at a 30° angle in relation to the guide bar, as shown in Fig. 14, ensuring that the round file is held straight, as shown in Fig. 15. Ensure that all saw blades are filed at the some angle, or the cutting efficiency of the tool will be impaired. Appropriate angles for sharpening the blades correctly are shown in Fig. 16.

2.Adjustment of depth gauge

To perform this work, please use the optional accessory depth gauge jointer and a standard flat file obtainable in local markets. The dimension shown in Fig. 17 is called the depth gauge. The depth gauge dictates the amount of incision (cut- in), and must be accurately maintained. The optimum depth gauge for this tool is 0.5 mm. After repeated blade sharpening, the depth gauge will be decreased. Accordingly, after every 3–4 sharpenings, place the depth gauge jointer as shown in Fig. 18, and file away that portion that protrudes above the upper plane of the depth gauge jointer.

CHAIN AND GUIDE BAR ASSEMBLY

1. Mounting

(1)Loosen the bolt with the accessory wrench and remove the chain cover. Please be careful not to lose the spring washer attached to the bolt.

(2)Mount the chain on the guide bar, and fit the chain to the sprocket as shown in Fig. 19. Ensure that the chain cutters are positioned as shown in the insert in Fig. 20.

(3)After fitting the adjustment pin to the guide bar hole, mount the guide bar to the main unit mounting section, and insert the chain into the guide bar groove, as shown in Fig. 20.

(4)Replace the chain cover and loosely tighten the bolt. Ensure that the spring washer is properly mounted on the bolt.

(5)After properly adjusting the chain tension as directed herein, use the accessory wrench to firmly tighten the bolt.

2.Removal

(1)Loosen the bolt with the accessory wrench and remove the chain cover. Please be careful not to lose the spring washer attached to the bolt.

(2)By moving the guide bar in the direction indicated by the arrow in Fig. 21, the guide bar will come off and the chain can be removed from the sprocket.

MAINTENANCE AND INSPECTION

1. Inspecting the Chain

(1)Be sure to occasionally inspect the chain tension. If the chain has become slack, adjust the tension as directed in the section entitled “Adjusting the Chain Tension”.

(2)When the chain blades become dull, sharpen them as directed in the section entitled “Sharpening of Chain Blade”.

(3)When sawing work has been completed, thoroughly oil the chain and guide bar by depressing the oil

English

button three or four times while the chain is rotating. This will prevent rusting.

2.Cleaning the Guide Bar

When the guide bar groove or the oil hole become clogged with sawdust, oil circulation becomes impaired, which could result in damage to the tool. Occasionally remove the chain cover and clean the groove and oil hole with a length of wire, as shown in Fig. 22.

3.Inspecting the carbon brushes (Fig. 23)

The motor employs carbon brushes which are consumable parts. Since an excessively worn carbon brush can result in motor trouble, replace the carbon brushes with new ones having the same carbon brush No. shown in the figure when it becomes worn to or near the “wear limit”. In addition, always keep carbon brushes clean and ensue that they

slide freely within the brush holders.

[Replacing the carbon brushes] Disassembly

(1)Loosen the two machine screws on the tail cover, and remove the tail cover in the direction indicated by the arrow in Fig. 24.

(2)Loosen the machine screw (made of brass), and pull out the carbon brush as shown in Fig. 25.

CAUTION

￿Be careful not to deform the brush holder during this operation.

Assembly

(1)Insert the new carbon brush and, after aligning the holder plate and terminal as shown in Fig. 25, reinsert and tighten the machine screw (made of brass).

(2)Mount the tail cover and refasten it with the two machine screws. Exercise the utmost care to prevent

the lead wire from approaching the armature or from being caught in the tail cover.

CAUTIONS

￿Please be sure to follow the above assembly method without fail. Should the lead wire contact the armature or become caught in the tail cover, there is danger of electric shock.

￿When replacing a carbon brush, never touch any components inside the motor other than those

necessary to effect replacement.

4.Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

5.Maintenance of the motor

The motor unit winding is the very “heart” of the power tool.

Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

6.Chain brake (CS35B)

If a chain saw hits a solid object at a high seed it reacts violently and kicks back. This is difficult to control and could be dangerous, especially with lightweight tools that tend to be used in all kind of positions. The chain brake immediately stops the chain from rotation if there is an unexpected kick- back. The chain brake can be activated by pressing your hand against the handguard or automatically by the kick-back itself.

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