Ryobi RY40500 Manuel d'utilisateur télécharger pdf (Page 30)

30 - English

MAINTENANCE

SIDE PLATE ANGLE

See Figure 39.

 CORRECT - 80° Produced automatically if cor-

rect diameter file is used in file holder.

 HOOK - “Grabs” and dulls quickly. Increases

potential of KICKBACK.

Results from using a file with diameter too small,

or file held too low.

 BACKWARD SLOPE - Needs too much feed

pressure, causes excessive wear to bar and

chain.

Results from using a file with diameter too large,

or file held too high.

DEPTH GAUGE CLEARANCE

See Figures 40 - 41.

 The depth gauge should be maintained at a

clearance of .025 in. Use a depth gauge tool

for checking the depth gauge clearances.

 Every time the chain is filed, check the depth

gauge clearance.

Use a flat file and a depth gauge jointer to lower

all gauges uniformly. Depth gauge jointers are

available in .020 in. to .035 in. Use a .025 in. depth

gauge jointer. After lowering each depth gauge,

restore original shape by rounding the front. Be

careful not to damage adjoining drive links with

the edge of the file.

Depth gauges must be adjusted with the flat file in

the same direction the adjoining cutter was filed

with the round file. Use care not to contact cutter

face with flat file when adjusting depth gauges.

GUIDE BAR MAINTENANCE

When the guide bar shows signs of wear, reverse

it on the saw to distribute the wear for maximum

bar life. The bar should be cleaned every day of

use and checked for wear and damage.

Feathering or burring of the bar rails is a normal pro-

cess of bar wear. Such faults should be smoothed

with a file as soon as they occur.

RESTORE ORIGINAL

SHAPE BY ROUNDING

THE FRONT

FLAT FILE

DEPTH GAUGE JOINTER

Fig. 40

Fig. 41

INCORRECT SIDE PLATE

FILING ANGLE

BACKWARD

SLOPE

HOOK

Fig. 39

80°

CORRECT SIDE

PLATE FILING

ANGLE

A bar with any of the following faults should be

replaced.

 Wear inside the bar rails which permits the chain

to lay over sideways.

 Bent guide bar.

 Cracked or broken rails.

 Spread rails.

Lubricate guide bars with a sprocket at their tip

weekly. Using a grease syringe, lubricate weekly in

the lubricating hole. Turn the guide bar and check

that the lubrication holes and chain groove are free

from impurities.

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Ryobi RY40500 Manuel d'utilisateur Page 30

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