Ryobi 770rEB Manuel d'utilisateur télécharger pdf (Page 14)

OPERATING INSTRUCTIONS

Fig. 13

Fig. 14

Each time the head is bumped, about 1 inch (25.4 mm.)

of trimming line is released. A blade in the cutting

attachment shield will cut the line to the proper length

if excess line is released.

For best results, tap the Bump Head™ on bare ground

or hard soil. If line release is attempted in tall grass, the

engine may stall. Always keep the trimming line fully

extended. Line release becomes more difficult as the

cutting line becomes shorter.

NOTE: Do not rest the Bump Head™ on the ground.

CAUTION: Do not remove or alter the line

cutting blade assembly. Excessive line length

will make the clutch overheat. This may lead

to serious personal injury or damage to the

unit.

Some line breakage will occur from:

• Entanglement with foreign matter

• Normal line fatigue

• Attempting to cut thick, stalky weeds

• Forcing the line into objects such as walls or fence

posts

TIPS FOR BEST TRIMMING RESULTS

• Keep the cutting attachment parallel to the ground.

• Do not force the cutting attachment. Allow the tip of

the line to do the cutting (especially along walls).

Cutting with more than the tip will reduce cutting

efficiency and may overload the engine.

• Cut grass over 8 inches (200 mm.) by working from

top to bottom in small increments to avoid premature

line wear or engine drag.

• Cut from right to left whenever possible. Cutting to the

left improves the unit's cutting efficiency. Clippings are

thrown away from the operator.

• Slowly move the trimmer into and out of the cutting

area at the desired height. Move either in a forward-

backward or side-to-side motion. Cutting shorter

lengths produces the best results.

• Trim only when grass and weeds are dry.

• The life of your cutting line is dependent upon;

• Following the previous trimming techniques

• What vegetation is being cut

• Where it’s being cut

For example, the line will wear faster when trimming

against a foundation wall as opposed to trimming

around a tree.

ADJUSTING TRIMMING LINE LENGTH

The Bump Head™ cutting attachment allows you to

release trimming line without stopping the engine. To

release more line, lightly tap the cutting attachment on

the ground (Fig. 14) while operating the trimmer at high

speed.

NOTE: Always keep the trimming line fully extended.

Line release becomes more difficult as cutting

line becomes shorter.

HOLDING THE TRIMMER

WARNING:

Always wear eye, hearing, foot

and body protection to reduce the risk of

injury when operating this unit.

Before operating the unit, stand in the operating position

(Fig. 13). Check for the following:

• The operator is wearing eye protection and proper

clothing.

• The right arm is slightly bent, and the hand is holding

the shaft grip.

• The left arm is straight, and the hand is holding the

handle.

• The unit is at waist level.

• The cutting attachment is parallel to the ground and

easily contacts the vegetation to be cut without the

operator having to bend over.

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Ryobi 770rEB Manuel d'utilisateur Page 14

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