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OPERATOR’S MANUAL
PCN3840 - RY74005D - 406 mm (16 in.) 38cc Chainsaw
PCN4545 - RY74007D - 457 mm (18 in.) 45cc Chainsaw
Your new chainsaw has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation,
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before
using this product.
Thank you for buying a Ryobi chainsaw.
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TABLE OF CONTENTS ■■■■■ Introduction .......................................................................................................................................................................................... 2 ■■■■■ General Safety Rules ...................................................................................................................................................................... 3 - 4 ■■■■■ Specific Safety Rules ..............................................
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GENERAL SAFETY RULES 3. Make sure that the area in which you are cutting is WARNING: free from obstructions. DO NOT let the nose of the guide bar contact a log, branch, fence, or any other The warnings, labels, and instructions found in this obstruction that could be hit while you are operating section of the operator’s manual are for your safety. the saw. Failure to follow all instructions may result in serious personal injury. 4. Cut at high engine speeds. Always cut with the engine running at
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GENERAL SAFETY RULES ■■■■■ OPERATE THE CHAINSAW ONL Y in well-ventilated ■ KEEP ALL PARTS OF YOUR BODY away from the saw areas. chain when the engine is running. ■■■■■ DO NOT OPERATE A CHAINSAW IN A TREE unless ■■■■■ ALWAYS CARRY THE CHAINSAW WITH THE ENGINE you have been specifically trained to do so. STOPPED AND THE BRAKE ENGAGED, the guide bar and saw chain to the rear, and the silencer away from ■■■■■ ALL CHAINSAW SERVICE, other than the items listed your body. When transporting the chainsaw
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SPECIFIC SAFETY RULES PROPER CLOTHING FOR SAFETY PUSH AND PULL ■■■■■ Wear close-fitting clothing. Always wear heavy, long The reaction force is always opposite to the direction the trousers, boots, and gloves. Do not wear jewellery, chain is moving. Thus, the operator must be ready to control shorts, sandals, or go barefoot. Do not wear loose-fitting the PULL when cutting on the bottom edge of the bar and clothing, which could be drawn into the engine or catch the PUSH when cutting along the top
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SYMBOLS Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and more safely. SYMBOL NAME EXPLANATION Indicates danger, warning or caution. It means Safety Alert Symbol attention!!! Your safety is involved. Your manual contains special messages to bring attention to potential safety concerns, machine damage Read Your Operator’s Manual as well as helpful operat
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SYMBOLS Petrol Use unleaded petrol intended for motor vehicle use with an octane rating of 87 ([R + M] / 2) or higher. Oil Use 2-cycle oil for air cooled engines. Mix Petrol and Oil Mix the fuel mix thoroughly and also each time before refuelling. SAVE THESE INSTRUCTIONS SPECIFICATIONS Weight - No bar, chain, fuel or oil ................................................................................................................ 4.4 kg (9.7 lbs) Fuel tank capacity ............................
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FEATURES (K) Throttle Lock Button See Figure 1. (L) Chain Oil Cap (A) Front hand guard/Chain Brake (M) Silencer (B) Front handle (N) Carburettor Adjustment (C) Cylinder cover (O) Rear handle (D) Primer bulb (P) Throttle Trigger (E) Choke Lever (Q) Fuel Mix Cap (F) Chain (R) On/Off Switch (G) SAFE-T-TIP® (S) Starter/Fan Housing (H) Guide Bar (T) Starter Grip (I) Chain Catcher (J) Trigger Release OPERATION The rakers (depth gauges) ahead of each cutter can minimise For your safety, study this enti
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OPERATION MIXING THE FUEL WARNING: ■■■■■ This product is powered by a 2-cycle engine and requires pre-mixing petrol and 2-cycle oil. Pre-mix unleaded petrol KICK-BACK occurs when the moving chain contacts an and 2-cycle engine oil in a clean container approved for petrol. object at the upper portion of the tip of the guide bar or ■■■■■ This engine is certified to operate on unleaded petrol when the wood closes in and pinches the saw chain in intended for motor vehicle use with an octane rating o
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OPERATION NOTE: Do not use dirty, used or otherwise contaminated oils. Damage may occur to the oil pump, bar, or chain. CAUTION: 1. Carefully pour the bar and chain oil into the tank. Failure to release partial throttle when chain brake lever 2. Fill the oil tank every time you fuel the engine. is in the brake position will result in serious damage to the unit. Never squeeze and hold the throttle trigger while STARTING THE ENGINE the chain brake is in the brake position. See Figure 8. Now you ar
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OPERATION 2. Accelerate the engine to full throttle just before entering the ■■■■■ Hold the saw firmly with both hands. Always keep your LEFT cut by squeezing the throttle trigger. HAND on the front handle and your RIGHT HAND on the rear handle so that your body is to the left of the chain line. 3. Begin cutting with the saw against the log. 4. Keep the engine at full throttle the entire time you are cutting. WARNING: 5. Allow the chain to cut for you; exert only light downward pressure. Forcing
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OPERATION ■■■■■ Consider the distribution and weight of heavy limbs (B). ADJUSTING IDLING SPEED ■■■■■ Clear out the undergrowth around the tree to be felled (C). See Figure 24. ■■ ■■■■■ If the engine starts, runs, and accelerates but will not idle, ■■■ Do not cut trees near electrical wires or buildings (D). turn the idling speed screw “T” clockwise to increase ■■■■■ Consider the direction in which the tree leans (E). idling speed. ■■ ■■■ Check the tree for damaged or dead branches which could ■
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OPERATION BUCKING LOGS UNDER STRESS On large diameter trees, stop the back cut before it is deep See Figure 35. enough for the tree to either fall or settle back on the stump. Then insert soft wooden or plastic wedges (F) into the cut so (C) LOG SUPPORTED AT ONE END. they do not touch the chain. Drive wedges in, little by little, (D) LOG SUPPORTED AT BOTH ENDS. to help jack the tree over. Make the first bucking cut (E) 1/3 of the way through the log and When bucking or felling with a wedge, it m
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OPERATION CUTTING SPRING POLES WARNING: See Figure 37. A spring pole (A) is any log, branch, rooted stump, or sapling Spring poles are dangerous and could strike the operator which is bent under tension by other wood so that it springs causing the operator to lose control of the chainsaw. This back if the wood holding it is cut or removed. On a fallen tree, could result in severe or fatal injury to the operator. a rooted stump has a high potential of springing back to the upright position during
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MAINTENANCE 4. Keep the file level with the top plate of the tooth. Do not let NOTE: New chain tends to stretch. Check the chain tension the file dip or rock. See Figure 54. frequently and tension as required. 5. Using light but firm pressure, stroke towards the front corner of the tooth. See Figure 55. CAUTION: 6. Lift the file away from the steel on each return stroke. A chain tensioned while warm may be too tight upon 7. Put a few firm strokes on every tooth. File all left-hand cutters coolin
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MAINTENANCE MAINTAINING DEPTH GAUGE CLEARANCE See Figures 51, 59, and 60. WARNING: ■ Maintain the depth gauge (A) at a clearance of 0.6 mm Although the guide bar comes with a SAFE-T-TIP® (0.025”). Use a depth gauge tool for checking the depth anti-kick-back device already installed, you need to check gauge clearances. the tightness of the mounting screw before each use. ■ Every time the chain is filed, check the depth gauge clearance. Tighten the mounting screw (A) of the nose guard as instructe
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MAINTENANCE Choose one of the following cleaning options: REPLACING THE SPARKING PLUG 9. To lightly clean, tap the filter against a smooth, flat surface See Figure 71. to dislodge most saw dust and dirt particles. This engine uses a Champion RCJ-4 with 0.63 mm 10. For a more thorough cleaning, clean in warm soapy water, (0.025”) electrode gap. Use an exact replacement and replace rinse, and let dry completely. every six months, or more frequently if necessary. NOTE: An alternative method is to c
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MAINTENANCE 4. Clean all foreign material from the saw. STORING THE CHAINSAW 5. Store it in a well-ventilated place that is inaccessible (1 MONTH OR LONGER) to children. 1. Drain all fuel from tank into a container approved for petrol. NOTE: Keep away from corrosive agents such as garden 2. Run the engine until it stops. This will remove all fuel-oil mix chemicals and de-icing salts. that could become stale and leave varnish and gum in the Abide by all government and local regulations for the sa
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TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION Engine starts, runs, Carburettor requires adjustment. Turn idling speed screw “T” clockwise to increase idling and accelerates but speed. If chain turns at idle, turn idling speed screw “T” will not idle. anticlockwise to decrease speed. Wear protective equipment and observe all safety instructions. See Figure 24. Engine starts and runs, 1. Chain oil tank empty. 1. Oil tank should be filled every time fuel tank but chain is not rota
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SAFETY DIRECTIVE EC DECLARATION OF CONFORMITY According to machinery directive 98/37/EC and EMC directive 89/336/EEC - We, Ryobi Technologies Inc., 1428 Pearman Dairy Road, Anderson, SC 29625 Declare in sole responsibility that the product: PCN3840 (RY74005D) and PCN4545 (RY74007D) - to which this certificate applies, conforms to the basic health and safety requirements of the Machinery Directive 98/37/EC and other relevant directives, such as EMC Directive 89/336/EEC and Outdoor Directive 2000/
