Ryobi RY52014 Manuel de l'opérateur télécharger pdf (Page 14)

MAINTENANCE

REPLACING THE BAR

See Figures 15 - 20.

WARNING:

To avoid possible serious injury, stop engine before re-

placing the bar, chain, or performing any maintenance

operation.

 Remove the bar nut and drivecase cover.

 The bar contains a bar stud slot that fits over the bar stud.

The bar also contains a chain tensioning pin hole which

fits over the chain tensioning pin.

 Place the bar onto the bar stud so that the chain tension-

ing pin fits into the chain tensioning pin hole.

 Fit the chain over the sprocket and into the bar groove.

The cutters on the top of the bar should face toward the

bar tip, in the direction of the chain rotation.

 Replace the side case cover and install the bar nut.

Tighten the bar nut finger tight only. The bar must be free

to move for tension adjustment.

CHAIN

TENSIONING SCREW

Fig. 19

BAR NUT

Fig. 20

 Remove all slack from chain by turning the chain tension-

ing screw clockwise, assuring that the chain seats into

the bar groove during tensioning.

 Lift the tip of the bar up to check for sag. Release the tip

of the bar, and turn the chain tensioning screw 1/2 turn

clockwise. Repeat this process until sag does not exist.

 Hold the tip of the bar up and tighten the bar nut se-

curely.

 Chain is correctly tensioned when there is no slack on

the underside of the bar, the chain is snug, but it can be

turned by hand without binding.

NOTE: If chain is too tight, it will not rotate. Loosen the

bar nut slightly and turn adjusting screw 1/4 turn counter-

clockwise. Lift the tip of the bar up and retighten bar nut.

CHAIN ROTATION

BAR NUT

CHAIN

SPROCKET

Fig. 18

BAR

DRIVECASE

COVER

BAR NUT

CHAIN

Fig. 15

DRIVECASE

COVER

CHAIN

TENSIONING PIN

BAR NUT

Fig. 16

BAR STUD SLOT

BAR STUD

CHAIN TENSIONING

PIN HOLE

BAR

SPROCKET

Fig. 17

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 20 21 22

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Ryobi RY52014 Manuel de l'opérateur Page 14

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