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MAINTENANCE

4.  Remove  the  bar  mounting  nuts  (

B

)  using  a

combination wrench (

C

) or a 5/8 in. spanner.

5.  Remove the clutch cover (

D

), and the outer guide bar

plate (

E

).

6.  Lay out the saw chain in a loop and straighten any kinks.

The cutters (

F

) should face in the direction of chain

rotation (

G

). If they face backwards, turn the loop over.

7.  Place the chain drive links (

H

) into the bar groove (

I

).

8. Position the chain so there is a loop at the back 

of the bar.

9.  Hold the chain in position on the bar and place the

loop round the sprocket (

J

).

10. Fit the bar flush against the mounting surface so that

the bar studs (

K

) are in the long slot of the bar.

NOTE:

When placing the bar on the bar studs ensure

that the adjusting pin (

L

) is in the chain tension pin hole.

11. Replace the outer guide bar plate ensuring that the

bar pin groove is at the bottom with the upper and

lower edges angled away from the guide bar.

12. Replace the clutch cover and bar mounting nuts.

13. Tighten the bar mounting nuts finger tight only. 

The bar must be free to move for tension adjustment

14. Remove all slack from the chain by turning the chain

tensioning screw (

M

) clockwise until the chain 

seats snugly against the bar with the drive links in the

bar groove.

15. Lift the tip of the guide bar up to check for sagging (

N

).

16. Release the tip of the guide bar and turn the chain

tensioning screw 1/2 turn clockwise. Repeat this

process until sagging does not exist.

17. Hold the tip of the guide bar up and tighten the bar

mounting nuts (

O

) securely. 

The chain is correctly tensioned when there is no sagging

on the underside of the guide bar, the chain is snug, 

but can be turned by hand without binding. Ensure that

the chain brake is not set.

NOTE:

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

bar nuts slightly and turn the tension adjuster 1/4 turn

anticlockwise. Lift the tip of the guide bar up and

retighten the bar nuts securely. Ensure that the chain will

rotate without binding.

ADJUSTING THE CHAIN TENSION (Fig. 48, 49

& 50)

WARNING

Never touch or adjust the chain while the motor

is running. The saw chain is very sharp. Always

wear  protective  gloves  when  performing

maintenance on the chain.

1  Stop the engine before setting the chain tension.

2.  Make sure the guide bar nuts are loosened to 

finger tight and turn the chain tensioner clockwise to

tension the chain.

NOTE:

A cold chain is correctly tensioned when there

is no slack on the underside of the guide bar, the chain

is snug and it can be turned by hand without binding.

3.  Retension the chain whenever the flats on the drive

links (

A

) hang out of the bar groove.

NOTE:

During normal saw operation, the temperature

of the chain increases. The drive links of a correctly

tensioned warm chain (

B

) will hang approximately

1.25 mm (0.05 in.) out of the bar groove. To help

determine the correct warm chain tension, the tip of

the combination wrench (

C

) can be used as a guide.

NOTE:

New chain tends to stretch. Check the chain

tension frequently and tension as required.

CAUTION

A chain tensioned while warm may be too tight

upon cooling. Check the “cold tension” before

next use.

CHAIN MAINTENANCE (Fig. 51 & 52)

CAUTION

Check that the switch is in the STOP “     ”

position before you work on the saw.

Use only a low-kick-back chain on this saw. This fast-

cutting chain provides kick-back reduction when properly

maintained. 
For smooth and fast cutting, maintain the chain properly. 
The chain requires sharpening when the wood chips are

small and powdery, the chain must be forced through the

wood during cutting, or the chain cuts to one side. During

maintenance of the chain, consider the following:

Improper filing angle of the side plate can increase

the risk of a severe kick-back.

Raker (depth gauge) clearance (

A

). 

1.  Too low increases the potential for kick-back.

2.  Not low enough decreases cutting ability.

If the cutter teeth hit hard objects such as nails and

stones, or are abraded by mud or sand on the wood,

have the Ryobi service dealer sharpen the chain.

NOTE:

Inspect the drive sprocket for wear or damage

when replacing the chain (

B

). If signs of wear or

damage are present in the areas indicated, have the

drive sprocket replaced by a Ryobi service dealer.

11

English

PCN 4040_4545 manual 

Summary of Contents for PCN 4040

Page 1: ...N197 PCN 4040 CHAINSAW OWNER S OPERATION MANUAL...

Page 2: ......

Page 3: ...STOP...

Page 4: ......

Page 5: ......

Page 6: ......

Page 7: ...cio Attenzione Prima di procedere al montaggio e alla messa in funzione indispensabile leggere attentamente le istruzioni del presente manuale Aten o indispens vel ler as instru es deste manual antes...

Page 8: ...u read and understand this operator s manual and all labels affixed to the tool Safety is a combination of using common sense staying alert and knowing how your saw works KNOW YOUR TOOL Read the opera...

Page 9: ...n the tension in the wood fibres is released KEEP THE HANDLES dry clean and free of oil or fuel mixture OPERATE THE CHAINSAW ONLY in well ventilated areas DO NOT OPERATE A CHAINSAW IN A TREE unless yo...

Page 10: ...en cutting on the bottom edge of the bar and the PUSH when cutting along the top edge NOTE Your chainsaw has been fully factory tested It is normal to find some slight oil residue on the saw MAINTENAN...

Page 11: ...eaning of the mechanism the dependability of a chain brake to perform under field conditions cannot be certified Keep the SAFE T TIP nose guard on the saw guide bar and use proper cutting techniques L...

Page 12: ...parks and flames Do not inhale fuel vapour Do not let petrol or oil come in contact with your skin Keep petrol and oil away from the eyes If petrol or oil comes in contact with the eyes wash them imme...

Page 13: ...6...

Page 14: ...use loss of control PUSH AND PULL Fig 19 The reaction force is always opposite to the direction the chain is moving Thus the operator must be ready to control the PULL A when cutting on the bottom edg...

Page 15: ...e idling speed screw T anticlockwise to reduce the idle RPM and stop the chain movement If the saw chain still moves at idling speed contact a Ryobi service dealer for adjustment and discontinue use u...

Page 16: ...ch NOTE Never cut through to the notch Always leave a band of wood between the notch and back cut approximately 2 inches 5 cm or 1 10 the diameter of the tree This is called a hinge or hingewood E It...

Page 17: ...mb into a tree to limb or prune Do not stand on ladders platforms a log or in any position which may cause you to lose your balance or control of the saw When pruning trees it is important not to make...

Page 18: ...49 50 WARNING Never touch or adjust the chain while the motor is running The saw chain is very sharp Always wear protective gloves when performing maintenance on the chain 1 Stop the engine before set...

Page 19: ...edge dulls quickly SIDE PLATE ANGLE Fig 58 D CORRECT 80 Produced automatically if you use the correct diameter file in the file holder E HOOK Grabs and dulls quickly increases the potential of KICK BA...

Page 20: ...s of the carburettor 1 For access to the air filter and carburettor area loosen the three screws A holding the cylinder cover B 2 Activate chain brake 3 Lift the front of the cylinder cover past chain...

Page 21: ...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...

Page 22: ...rocedure with a new sparking plug Engine starts but will not Carburettor requires L Contact a Ryobi service dealer for accelerate properly Low jet adjustment carburettor adjustment Engine starts but w...

Page 23: ...n Operating Chain Brake earlier in this manual 2 Chain tension too tight 2 Tension chain per instructions in Maintenance Adjusting the Chain Tension earlier in this manual 3 Check guide bar and 3 Refe...

Page 24: ...the retailer and given to the end user Deterioration caused by normal wear and tear unauthorised or improper use or maintenance or overload are excluded from this guarantee as are accessories such as...

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