Ryobi PCN4545-RY74007D Manuel de l'opérateur télécharger pdf (Page 17)

Choose one of the following cleaning options:

9. To lightly clean, tap the filter against a smooth, flat surface

to dislodge most saw dust and dirt particles.

10. For a more thorough cleaning, clean in warm soapy water,

rinse, and let dry completely.

NOTE: An alternative method is to clean the filter with

compressed air (always wear eye protection to avoid

eye injury).

11. Reinstall the air filter, making sure that the tabs on the air

filter are located in channels on the air filter bottom before

tightening filter retainer screw.

■ Clean the pre-filter (D) every 25 tanks of fuel or sooner, if

required. Remove the cylinder cover (B), starter assembly

(E) and the fan housing baffle (F) for access to the pre-filter

in the engine housing.

NOTE: If you use an air hose for drying, blow through both

sides of filter.

CAUTION:

Never run the engine without the air filter: serious

damage could result.

Make sure the air filter is correctly placed in the air filter

cover before reassembly.

CLEANING THE STARTER UNIT

See Figure 67.

Use a brush or compressed air to keep the cooling vents of the

starter assembly free and clean of debris.

CLEANING THE ENGINE

See Figures 68 and 69.

Clean the cylinder fins and flywheel fins with compressed air or

a brush periodically. Dangerous overheating of the engine may

occur due to impurities on the cylinder.

WARNING

Never run the saw without all the parts, including the

drivecase cover and starter housing, securely in place.

Because parts can fracture and pose a danger of thrown

objects, leave repairs of the flywheel and clutch to trained

Ryobi service dealer personnel.

NOTE: Depending on the type of fuel used, the type and amount

of oil used, and/or your operating conditions, the exhaust port

and silencer may become blocked with carbon deposits. If you

notice a power loss with your petrol-powered tool, you may

need to remove these deposits to restore performance. We

highly recommend that only qualified service technicians

perform this service.

CHECKING THE FUEL FILTER

See Figure 70.

Check the fuel filter (A) periodically. Replace it if contaminated

or damaged.

REPLACING THE SPARKING PLUG

See Figure 71.

This engine uses a Champion RCJ-4 with 0.63 mm

(0.025”) electrode gap. Use an exact replacement and replace

every six months, or more frequently if necessary.

1. Loosen the sparking plug by turning it anticlockwise with

a spanner.

2. Remove the sparking plug.

3. Hand-thread the new sparking plug, turning it clockwise.

NOTE: Be careful not to cross-thread the sparking plug.

Cross-threading will seriously damage the product.

CLEANING THE SPARK ARRESTING

SILENCER

See Figure 72.

The silencer (A) is equipped with a spark arrester screen (B).

A faulty spark arrester screen can create a fire hazard. Through

normal use the screen can become dirty and should be

inspected weekly and cleaned as required. Always keep the

silencer and spark arrester on your saw in good condition.

WARNING

Silencer surfaces are very hot during and after operation

of the chainsaw. Keep all body parts away from the

silencer. Serious burns may occur if contact is made with

the silencer.

1. Allow the silencer to cool.

2. The spark arrester screen (B) is retained by the deflector

(C). Remove the nuts (D) and screen retainer to access

the spark arrester screen.

3. Replace the spark arrester screen if it is cracked or

otherwise deteriorated.

CHAIN BRAKE

See Figures 73 and 74.

■■

■ Remove the clutch cover and clean the chain brake

components. Check wear on the brake band (A). If brake

band is worn or deformed, have it serviced at your nearest

authorised service dealer. The band thickness should not

be less than 0.60 mm (0.024 in.), or worn halfway through.

■■

■ Always keep the chain brake mechanism clean (B) and

lightly lubricate the linkage (C).

■■

■ Always test the chain brake performance after servicing or

cleaning. Refer to “Operation – Operating Chain Brake”

earlier in this manual for additional information.

■■

■ Check and, if damaged, replace the chain catcher (D).

MAINTENANCE

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Ryobi PCN4545-RY74007D Manuel de l'opérateur Page 17

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