Ryobi RY64400 Manuel de l'opérateur télécharger pdf (Page 16)

12 - English

MAINTENANCE

Air Filter:

 Clean the air filter as previously described.

Cultivator Body:

 Clean dirt, grass, and other materials from the entire

unit.

 Wipe the tines with lubricant or spray them with silicone

lubricant to prevent rusting.

 Oil the throttle cable and all visible moving parts. Do not

remove the engine cover.

 Order new parts to replace any that are badly worn or

broken.

 Store in an upright position in a clean, dry place. Store

with the handles in the extended position, or loosen

handle knobs and fold handles down. Do not allow

throttle cable to become pinched when lowering the

handlebar.

 Properly dispose of any leftover fuel in compliance with

Federal, state. and local laws.

ADJUSTING CAMSHAFT-TO-ROCKER ARM

CLEARANCE

See Figures 21 - 23.

Inspect the camshaft-to-rocker arm clearance after every

25 hours of operation. This should be done in a clean, dust-

free environment.

NOTE: This procedure requires partial disassembly of the

engine. If you are unsure if you are qualified to perform this

operation, take the unit to an authorized service center.

 Stop the engine. Allow the engine to cool completely

before proceeding.

 Remove screws from the engine cover. Remove engine

cover and set aside.

 Disconnect the spark plug wire.

 Using a Torx screwdriver, remove the screw from the

rocker arm cover. Remove the cover and gasket and set

aside.

 Position camshaft by pulling the recoil starter grip just

until the deep hole in the camshaft gear is located at the

6 o’clock position as shown.

 Place the feeler gauge under each rocker arm and

measure the gap. The gap should be between .006 in.

(0.15 mm) and .008 in. (0.20 mm) for both rocker arms.

NOTE: Use a standard automotive feeler gauge. The .006

in. (0.15 mm) feeler gauge should slide between the rocker

arm and valve stem with a slight amount of resistance

but without binding. The 0.008 in. (0.20 mm) feeler gage

should not slide between the rocker arms and the cam

lobes — it should be held tight.

 If the valve clearance is not between .006 in. (0.15 mm)

and .008 in. (0.20 mm), the clearance should be adjusted

as follows:

CHANGING ENGINE LUBRICANT

See Figure 20.

For best performance, engine lubricant should be changed

after every 25 hours of operation.

To change the engine lubricant:

 Stop the engine and disconnect the spark plug wire. Allow

the engine to cool completely before proceeding.

 Remove the oil fill cap/dipstick.

 Tip the unit on its side and allow lubricant to drain from

the oil fill hole into an approved container.

NOTE: Drain the lubricant while the engine is still warm

but not hot. Warm lubricant will drain quickly and more

completely.

 Return the unit to an upright position and refill with lubri-

cant following the instructions in the Adding/Checking

Engine Lubricant section previously in this manual.

NOTE: Used lubricant should be disposed of at an approved

disposal site. See your local retailer for more information.

CLEANING THE EXHAUST PORT AND MUFFLER

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

lubricant used, and/or your operating conditions, the exhaust

port and muffler may become blocked with carbon deposits.

If you notice a power loss with your gas powered tool, you

may need to remove these deposits to restore performance.

We highly recommend that only qualified service technicians

perform this service.

STORING THE CULTIVATOR

The following steps should be taken before storing the cul-

tivator for the season.

Fuel Tank:

 Drain the fuel tank completely into a container approved

for gasoline. Even under ideal conditions, stored fuel

containing ethanol or MTBE can start to go stale in 30

days. Stale fuel has a high gum content and can clog the

carburetor and restrict fuel flow. The fuel tank should also

be drained if the cultivator will not be used for more than

two weeks.

 Restart the engine to make sure no fuel is left in the car-

buretor. Run the engine until it stops. This helps prevent

gum deposits from forming inside the carburetor and

possible engine damage.

Spark Plug:

 Disconnect spark plug wire and remove the spark plug.

Pour a teaspoon of clean, air-cooled, 4-cycle lubri-

cant through the spark-plug hole into the combustion

chamber.

 Leaving the spark plug out, pull the starter cord two or

three times to coat the inside of the cylinder wall.

 Inspect spark plug and clean or replace, as necessary.

 Reinstall the spark plug, but leave the spark plug wire

disconnected.

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Ryobi RY64400 Manuel de l'opérateur Page 16

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