background image

10

English (Original Instructions)

ADJUSTING IDLING SPEED

See figure 24.

 

If the engine starts, runs, and accelerates but will 

not idle, turn the idling speed screw “T” clockwise to 

increase idling speed.

 

If the chain turns at idle, turn the 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 service dealer for adjustment and 

discontinue use until the repair is made.

 WARNING

The saw chain should never turn at idle. Turn the idling 

speed screw “T” anticlockwise to reduce the idle RPM 

and stop the chain, or contact a service dealer for 

adjustment and discontinue use until the repair is made. 

Serious personal injury may result from the saw chain 

turning at idle.

OPERATING THE CHAIN BRAKE

See figure 25 - 26.

Refer to “Safety” earlier in this manual for additional 

information. Check the operating condition of the chain 

brake prior to each use.
1.  Start the engine and grasp the front and rear handles 

securely with both hands.

2.  Pull the throttle trigger to bring the chainsaw up to full 

speed. Using the back of your left hand, engage the 

chain brake (A) by pushing the chain brake lever/hand 

guard toward the bar while the chain is rotating rapidly.

NOTE:

 The chain brake should engage and stop the 

chain immediately. If not, stop the saw by placing the 

ignition switch in the “O” stop position. Take the saw to  

service dealer for repair and discontinue use until the 

repair is made.

3.  Reset the chain brake back into the run position (B) by 

grasping the right-hand side (from operator’s position) 

of the chain brake lever/hand guard and pull towards 

the front handle until you hear a click.

FELLING TREES – HAZARDOUS CONDITIONS

See figure 27.

 WARNING

Do not fell trees during periods of high wind or heavy 

precipitation. Wait until the hazardous weather has 

ended.

When felling a tree, it is important that you heed the 

following warnings to prevent possible serious injury.

 

Wear eye, hearing, and head protection (A) when 

operating this equipment.

 

Do not cut down trees having an extreme lean or large 

trees with rotten or dead limbs, loose bark, or hollow 

trunks. Have these trees pushed or dragged down with 

heavy equipment, then cut them up.

 

Consider the distribution and weight of heavy limbs 

(B).

 

Clear out the undergrowth around the tree to be felled 

(C).

 

Do not cut trees near electrical wires or buildings (D).

 

Consider the direction in which the tree leans (E).

 

Check the tree for damaged or dead branches which 

could fall and hit you during felling (F).

 

Periodically glance at the top of the tree during the 

back-cut to assure the tree is going to fall in the 

desired direction.

 

Keep all bystanders at a safe distance (G) (at least 

twice the height of the tree).

 

Prepare a path of safe retreat (H).

 

If the tree starts to fall in the wrong direction, or if the 

saw gets caught or hung up during the fall, leave the 

saw and save yourself!

 

Consider the wind direction before felling a tree.

 

Do not fell trees near power lines or near buildings 

which could be struck by falling limbs or the tree itself.

 

The chainsaw operator should keep on the uphill side 

of the terrain as the tree is likely to roll or slide downhill 

after it is felled.

 

Remove dirt, stones, loose bark, nails, staples, and 

wire from the tree where felling cuts are to be made.

 WARNING

Do not fell trees near power lines or near buildings 

which could be struck by falling limbs or the tree itself.

PROPER PROCEDURE FOR TREE FELLING

See figure 28 - 31.

1.  Pick your escape route (or routes in case the intended 

route is blocked). Clear the immediate area around the 

tree and make sure there are no obstructions in your 

planned path of retreat. Clear the path of safe retreat 

approximately 135° from the planned line of fall (A).

2.  Consider the force and direction of the wind, the lean 

and balance of the tree, and the location of large limbs. 

These things influence the direction in which the tree 

will fall. Do not try to fell a tree along a line different 

from its natural line of fall (B).

3.  Cut a notch about 1/3 the diameter of the trunk in 

the side of the tree (C). Make the notch cuts so they 

intersect at right angles to the line of fall. This notch 

should be cleaned out to leave a straight line. To keep 

Summary of Contents for RCS4640N

Page 1: ...RCS4640N PETROL CHAINSAW Important It is essential that you read the instructions in this manual before assembling maintaining and operating this machine...

Page 2: ...assembled Be sure that the saw chain stops moving when the throttle control trigger is released GENERAL PRECAUTIONS Know your tool Read the operator s manual carefully Learn the saw s applications an...

Page 3: ...g protection reduces the ability to hear warnings shouts or alarms The operator must pay extra attention to what is going on in the work area Keep bystanders and animals out of the work area Do not al...

Page 4: ...Symptoms include episodic blanching of fingers in response to cold numbness and tingling In extreme cases it will cause loss of touch sensation Anti vibration system does not guarantee that you will...

Page 5: ...and bar lubricant to the chain and bar oil reservoir every time you add fuel to the chain saw fuel tank Mix fuel outdoors where there are no sparkles or flames Do not smoke when mixing fuel or filling...

Page 6: ...ngth 375 mm Chain pitch 8 26 mm 0 325 Chain gauge 1 27 mm 0 05 Chain type 0 325 low profile full complement Drive sprocket 7 teeth x 0 325 Engine displacement 46 cm3 Maximum engine power ISO 7293 1 8...

Page 7: ...WARNING Kick back occurs when the moving chain contacts an object at the upper portion of the tip of the guide bar or when the wood closes in and pinches the saw chain in the cut Contact at the upper...

Page 8: ...nt only Mix 2 lubricant into the petrol This is a 50 1 ratio Mix the fuel thoroughly and also each time before refuelling Mix in small quantities Do not mix quantities larger than usable in a 30 day p...

Page 9: ...t do not attempt to start in the full choke position skip step 5 Push and release primer bulb 10 times Pull the choke out and push it back to the original run position STOPPING THE ENGINE See figure 1...

Page 10: ...trigger as soon as the cut is completed allowing the engine to idle Running the saw at full throttle without a cutting load may result in unnecessary wear to the chain bar and engine 7 Do not put pres...

Page 11: ...quipment Do not cut down trees having an extreme lean or large trees with rotten or dead limbs loose bark or hollow trunks Have these trees pushed or dragged down with heavy equipment then cut them up...

Page 12: ...operations stand on the uphill side so that the cut off section of the log cannot roll over you Sometimes it is impossible to avoid pinching with just standard cutting techniques or difficult to predi...

Page 13: ...he cutters should face in the direction of chain rotation If they face backwards turn the loop over 7 Place the chain drive links into the bar groove 8 Position the chain so there is a loop at the bac...

Page 14: ...e A Too low increases the potential for kick back 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...

Page 15: ...any of the following faults should be replaced Wear inside the bar rails which permits the chain to lie over sideways Bent guide bar Cracked or broken rails Spread rails In addition lubricate guide b...

Page 16: ...will seriously damage the engine 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...

Page 17: ...or damaged parts Before each use For loose fasteners Before each use For loose parts Before each use Chain brake function Before each use For fuel leaks Before each use Inspect and Clean Bar Before ea...

Page 18: ...carburettor adjustment Engine starts but will not run properly at high speed Carburettor requires H High jet adjustment Contact a service dealer for carburettor adjustment Engine does not reach full s...

Page 19: ...cant is on the guide bar contact a service dealer Bar and chain running hot and smoking Chain brake engaged Release chain brake refer to Operation operating chain brake earlier in this manual Chain te...

Page 20: ...tronic Industries Australia Pty Ltd Level 1 660 Doncaster Road Doncaster VIC 3108 Australia Techtronic Industries New Zealand Ltd 18 26 Amelia Earhart Avenue Mangere Auckland 2022 New Zealand 96099401...

Reviews: