RYOBI Cordless Chainsaw

Model: R18CHS12 / OCS1825

Important Information

It is essential that you read the instructions in this manual before assembling, operating, and maintaining the product. Subject to technical modification. Safety, performance, and dependability have been given top priority in the design of your cordless chainsaw.

Intended Use

The cordless chainsaw is intended for outdoor use only. For safety reasons, the product must be adequately controlled by using a two-handed operation at all times. The product is designed for cutting branches, trunks, logs, and beams of a diameter determined by the cutting length of the guide bar. It is designed to cut wood only. The product is to be used in domestic applications only by adults who have received adequate training on the hazards and preventative measures to be taken while using the product. It should not be used for professional tree services. Do not use the product for any other purpose.

General Product Safety Warnings

⚠️ WARNING! Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference. The term "power tool" in the warnings refers to your mains-operated (corded) product or battery-operated (cordless) product.

Work Area Safety

Electrical Safety

Personal Safety

Power Tool Use and Care

Battery Tool Use and Care

Service

General Chainsaw Safety Warnings

Causes and Operator Prevention of Kickback:

Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. Tip contact in some cases may cause a sudden reverse reaction, kicking the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw which could result in serious personal injury. Do not rely exclusively upon the safety devices built into your saw. As a chainsaw user, you should take several steps to keep your cutting jobs free from accident or injury.

Kickback is the result of chainsaw misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below:

Additional Safety Warnings

Personal Protective Equipment (PPE)

Good quality personal protective equipment, as used by professionals, helps reduce the risk of injury to the operator. The following items should be used when operating the product:

Additional Battery Safety Warnings

Instructions Concerning the Proper Techniques for Basic Felling, Limbing, and Cross-Cutting

Understanding the Forces Within the Wood

When you understand the directional pressures and stresses inside the wood, you can reduce the pinches or at least expect them during your cutting. Tension in the wood means the fibres are being pulled apart, and if you cut in this area, the kerf or cut tends to open as the saw goes through. If a log is being supported on a saw-horse and the end is hanging unsupported over the end, tension is created on the upper surface due to the weight of the overhanging log stretching the fibres. Likewise, the underside of the log is compressed and the fibres are being pushed together. If a cut is made in this area, the kerf tends to close up during the cut. This cut would pinch the blade.

Push and Pull

The reaction force is always opposite to the direction the chain is moving. The operator must be ready to control the tendency for the product to pull away and push backwards. The product pulls away (forward motion) when cutting on the bottom edge of the bar. The product pushes backwards (towards the operator) when cutting along the top edge.

Saw Jammed in the Cut

Turn off the product, and remove the battery pack. Do not try to force the chain and bar out of the cut as this is likely to break the chain, which may swing back and strike the operator. This situation normally occurs because the wood is incorrectly supported, which forces the cut to close under compression, thereby pinching the blade. If adjusting the support does not release the bar and chain, use wooden wedges or a lever to open the cut and release the saw. Never try to start the chainsaw when the guide bar is already in a cut or kerf.

Skating/Bouncing

When the chainsaw fails to dig in during a cut, the guide bar can begin hopping or dangerously skidding along the surface of the log or branch, possibly resulting in the loss of control of the chainsaw. To prevent or reduce skating or bouncing, always use the saw with both hands ?. Make sure that the saw chain establishes a groove for cutting. Never cut small, flexible branches or brushes with your chainsaw. Their size and flexibility can easily cause the saw to bounce towards you or bind up with enough force to cause a kickback. The best tool for that kind of work is a hand saw, pruning shears, an axe, or other hand tools.

Felling a Tree

When bucking and felling operations are being performed by two or more persons at the same time, the felling operations should be separated from the bucking operation by a distance of at least twice the height of the tree being felled. Trees should not be felled in a manner that would endanger any person, strike any utility line, or cause any property damage. If the tree does make contact with any utility line, the company should be notified immediately. 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. An escape path should be planned and cleared as necessary before cuts are started. The escape path should extend back and diagonally to the rear of the expected line of fall.

Before felling starts, consider the natural lean of the tree, the location of larger branches, and the wind direction to judge which way the tree will fall. Remove dirt, stones, loose bark, nails, staples, and wire from the tree. Do not attempt to fell trees which are rotten or have been damaged by wind, fire, lightning, etc. This is extremely dangerous and should only be completed by professional tree surgeons.

  1. Notching undercut: Make the notch 1/3 the diameter of the tree, perpendicular to the direction of the fall. Make the lower horizontal notching cut first. This will help to avoid pinching either the saw chain or the guide bar when the second notch is being made.
  2. Felling back cut: Make the felling back cut at least 50 mm (2 in.) higher than the horizontal notching cut. Keep the felling back cut parallel to the horizontal notching cut. Make the felling back cut so enough wood is left to act as a hinge. The hinge wood keeps the tree from twisting and falling in the wrong direction. Do not cut through the hinge. As the felling gets close to the hinge, the tree should begin to fall. If there is any chance that the tree may not fall in the desired direction or it may rock back and bind the saw chain, stop cutting before the felling back cut is complete and use wedges of wood, plastic or aluminium to open the cut and drop the tree along the desired line of fall. When the tree begins to fall, remove the chainsaw from the cut, stop the motor, put the chainsaw down, and use the retreat path planned. Be alert for falling overhead limbs and watch your footing.

Diagram Description: Felling a tree involves making a notching undercut (1) and a felling back cut (2). The diagram shows the relative positions and angles for these cuts, emphasizing the importance of the hinge wood. A measurement of 5 cm (2 inches) is indicated for the depth of the undercut and the height difference for the back cut.

Removing Buttress Roots

A buttress root is a large root extending from the trunk of the tree above the ground. Remove large buttress roots before felling. Make the horizontal cut into the buttress first, followed by the vertical cut. Remove the resulting loose section from the work area. Follow the correct tree felling procedure after removing the large buttress roots.

Bucking a Log

Bucking is cutting a log into lengths. It is important to make sure your footing is firm and your weight is evenly distributed on both feet. When possible, the log should be raised and supported by the use of limbs, logs or chocks. Follow the simple directions for easy cutting. When the log is supported along its entire length, it is cut from the top (overbuck).

Diagram Description: Bucking a log supported along its entire length involves cutting from the top (overbuck).

When the log is supported on one end, cut 1/3 the diameter from the underside (underbuck). Then make the finished cut by overbucking to meet the first cut.

Diagram Description: Bucking a log supported on one end requires an initial cut from the underside (underbuck) to about 1/3 the diameter, followed by an overbuck cut to meet the first.

When the log is supported on both ends, cut 1/3 the diameter from the top (overbuck). Then make the finished cut by underbucking the lower 2/3 to meet the first cut.

Diagram Description: Bucking a log supported on both ends involves an initial cut from the top (overbuck) to about 1/3 the diameter, followed by an underbuck cut from the bottom to meet the first.

When bucking on a slope always stand on the uphill side of the log. To maintain control when "cutting through", release the cutting pressure near the end of the cut without relaxing your grip on the chainsaw handles. Do not let the chain contact the ground. After completing the cut, wait for the saw chain to stop before you move the chainsaw. Always stop the motor before moving from tree to tree.

Limbing a Tree

Limbing is removing the branches from a fallen tree. When limbing, leave larger lower limbs to support the log off the ground. Remove the small limbs in one cut. Branches under tension should be cut from the bottom up to avoid binding the chainsaw.

Springpoles

A springpole is any log, branch, rooted stump, or sapling that is bent under tension by other wood so that it springs back if the wood holding it is cut or removed. On a fallen tree, a rooted stump has a high potential of springing back to the upright position during the bucking cut to separate the log from the stump. Watch out for springpoles--they are dangerous. Do not attempt to cut bent branches or stumps that are under tension unless you are professionally trained and competent to do so.

⚠️ WARNING! Springpoles are dangerous and could strike the operator, causing the operator to lose control of the chainsaw. This could result in a severe or fatal injury to the operator. Cutting spring poles should be done by trained users.

Transportation and Storage

Transportation and Storage

Transporting Lithium Batteries

Maintenance

General Maintenance

Maintenance Schedule

TaskFrequency
Bar lubricationBefore each use
Chain tensionBefore each use and frequently
Chain sharpnessBefore each use (visual check)
For damaged partsBefore each use
For loose fastenersBefore each use
Inspect and clean BarBefore each use
Complete sawAfter each use

Safety Devices

Chain catcher

The chain catcher prevents the saw chain from being thrown back towards the operator if the saw chain comes loose or breaks.

Guide bars

Generally, guide bars with small radius tips have a somewhat lower potential for kickback. Use a guide bar and matching chain that is just long enough for the job. Longer bars increase the risk of loss of control during sawing. Regularly check the chain tension. When cutting smaller branches (less than the full length of the guide bar) the chain is more likely to be thrown off if the tension is not correct.

Low-kickback saw chain

The low-kickback saw chain helps to reduce the possibility of a kickback event. The rakers (depth gauges) ahead of each cutter can minimise the force of a kickback reaction by preventing the cutters from digging in too deeply. Use only replacement guide bar and chain combinations that are recommended by the manufacturer. As saw chains are sharpened, they lose some of the low-kickback qualities, and extra caution is required. For safety, replace saw chains when cutting performance decreases.

Spiked bumper

The integral bumper spike may be used as a pivot when making a cut. It helps to keep the body of the chainsaw steady while cutting. When cutting, push the product forward until the spikes dig into the edge of the wood, then move the rear handle up or down in the direction of the cutting line to help ease the physical strain of cutting.

Over-temperature protection

The battery pack has over-temperature protection, which is designed to protect the battery cells from damage in the event of high temperatures. This feature may cause the battery to stop powering the product until the battery cells cool down. If the battery pack is warm to touch, allow it to cool down before resuming operation. If the product still does not work, connect the battery pack to the charger, which can also indicate over-temperature protection. When the battery cells cool down, the charger begins to charge the battery. NOTE: High ambient temperatures above 30° C and high-power tools, such as chainsaws, can cause the battery cells to heat up faster. Monitor the battery pack regularly, and if it is warm to touch, change the battery or allow the battery to cool down. NOTE: The battery pack LED indicator stops working if the battery protection feature has caused the battery pack to stop powering the product.

Symbols on the Product

Symbols in this Manual

Product Overview

Diagram Description: An illustration shows the RYOBI cordless chainsaw with various parts labeled: Guide bar, Chain, Front hand guard, Front handle, Rear handle, Switch trigger, Trigger release, Chain lubricant cap, Operator's manual, Sprocket cover, Sprocket cover screw, Chain tensioning screw, Chain catcher, Hex key, Guide bar cover, Chain lubricating oil, Battery pack, Charger. The models R18CHS12 and OCS1825 are indicated.

Getting Started

Follow these steps to get your chainsaw ready for use:

  1. Wear Personal Protective Equipment (PPE): Wear full eye protection, ear protection, non-slip heavy-duty gloves ?, substantial footwear ?, and protective clothing at all times while operating the product. Do not operate the product when barefoot or wearing open sandals.
  2. Remove the guide bar cover.
  3. Loosen the sprocket cover screw.
  4. Adjust the chain tension: To increase the chain tension, turn the chain tensioning screw clockwise. To reduce the chain tension, turn the chain tensioning screw counterclockwise. NOTE: Frequently check the chain tension while turning the chain tensioning screw. The gap between the drive teeth and bar should be between 3 and 4 mm.
  5. Tighten the sprocket cover screw. NOTE: The temperature of the chain increases during normal operation, causing the chain to stretch. Check the chain tension frequently and adjust as required. A chain that is tensioned while warm may be too tight upon cooling. Make sure that the chain tension is correctly adjusted as specified in these instructions.
  6. Prepare the oil tank: Remove the cap from the oil tank. Pour the oil into the oil tank, and monitor the oil level gauge. Ensure that no dirt enters the oil tank while filling. NOTE: Use only RYOBI chainsaw lubricating oil from an authorised service centre. Close the oil tank, and tighten the cap. Wipe off any spillage. Press the oil tank cap once to pump oil to the chain before starting the product. NOTE: To keep the chain lubricated while cutting, press the oil tank cap once every few minutes. NOTE: Never work without chain lubricant. If the saw chain is running without lubricant, the guide bar and the saw chain can be damaged. Before and while using the chainsaw, check the oil level in the oil level gauge.
  7. Insert the battery pack: Insert the battery pack into the product. Make sure that the latch of the battery pack clicks in place and that the battery pack is fully seated and securely attached before beginning operation.
  8. Start the product: Pull the trigger release. Press the switch trigger.

⚠️ WARNING: Grip both handles ? with the thumbs and fingers encircling the handles. Ensure that the left hand is holding the front handle so that the thumb is underneath.

⚠️ WARNING: Always hold the product with the right hand on the rear handle and the left hand on the front handle. Do not operate the saw using only one hand ☝️❌.

Maintenance Procedures

Replacing the Bar and Chain

Diagram Description: Steps for replacing the bar and chain are illustrated. This involves removing the battery, loosening the sprocket cover screw, removing the screw, washer, sprocket cover, and bar/chain assembly. The new chain is installed on the bar, ensuring the drive links fit the groove and form a loop at the back. The chain is positioned around the drive sprocket. The bar is lowered and placed flush against the mounting surface. Finally, the sprocket cover, washer, and screw are reinstalled. The diagram also shows how the chain should face the direction of rotation and how to loop it around the sprocket.

  1. Remove the battery pack ?➡️❌.
  2. Loosen the sprocket cover screw.
  3. Remove the screw, washer, sprocket cover, and bar and chain assembly.
  4. Install the new chain on the bar. Insert the chain drive links into the bar groove. Position the chain so that there is a loop at the back of the bar. NOTE: The saw chain should face in the direction of chain rotation. If the saw chain faces backwards, turn the loop over. Hold the chain in position on the bar, and place the loop around the drive sprocket.
  5. Lower the bar and place it flush against the mounting surface.
  6. Reinstall the sprocket cover, washer, and screw.

Adjusting the Chain Tension

Diagram Description: Steps for adjusting chain tension are shown. This includes removing the battery, loosening the sprocket cover screw, adjusting the chain tensioning screw (clockwise to tighten, counterclockwise to loosen), checking the gap between drive teeth and bar (3-4 mm), and tightening the sprocket cover screw. The diagram also illustrates the correct grip for holding the chainsaw.

  1. Remove the battery pack ?➡️❌.
  2. Loosen the sprocket cover screw.
  3. Adjust the chain tension until the gap between the drive teeth and bar is between 3 and 4 mm. To increase the chain tension, turn the chain tensioning screw clockwise. To reduce the chain tension, turn the chain tensioning screw counterclockwise. NOTE: Frequently check the chain tension while turning the chain tensioning screw. NOTE: The temperature of the chain increases during normal operation, causing the chain to stretch. Check the chain tension frequently and adjust as required. A chain that is tensioned while warm may be too tight upon cooling. Make sure that the chain tension is correctly adjusted as specified in these instructions.
  4. Tighten the sprocket cover screw.

Cleaning the Product

Diagram Description: Steps for cleaning the product are illustrated. This involves removing the battery pack and using a brush to remove dirt and dust from the front hand guard. A soft, dry cloth is used for plastic parts. A warning symbol indicates that water should not be used.

  1. Remove the battery pack ?➡️❌.
  2. Use a brush to remove loose dirt and saw dust from around the front hand guard. Use a soft, dry cloth to clean the plastic parts. ⚠️ WARNING: Do not use water to clean the product.

Transporting the Product

Diagram Description: Steps for transporting the product are shown. This includes removing the battery, installing the guide bar cover, draining lubricant from the tank, and securing the product for transport. A trolley is depicted for moving the chainsaw.

  1. Remove the battery pack ?➡️❌.
  2. Install the guide bar cover.
  3. Remove the chain lubricant cap. Drain all bar and chain lubricant from the tank into a container approved for lubricant.
  4. When transporting the product, secure it against movement or falling to prevent injury to persons or damage to the product.

Storing the Product

Diagram Description: Steps for storing the product are shown, similar to transporting. This includes removing the battery, installing the guide bar cover, draining lubricant, and storing the product in a suitable location. The diagram shows the product on a trolley being placed into a storage cabinet.

  1. Remove the battery pack ?➡️❌.
  2. Install the guide bar cover.
  3. Remove the chain lubricant cap. Drain all bar and chain lubricant from the tank into a container approved for lubricant.
  4. When transporting the product, secure it against movement or falling to prevent injury to persons or damage to the product.
  5. Store the product in a cool, dry, and well-ventilated place that is inaccessible to children. Keep the product away from corrosive agents, such as garden chemicals and de-icing salts. Do not store the product outdoors.

Product Specifications

SpecificationDetails
Product TypeCordless chainsaw
ModelR18CHS12 / OCS1825
Rated voltage18 V d.c.
No-load speed3.6 m/s
Guide bar length254 mm
Usable cutting length250 mm (9.8 in.)
Chain pitch9.5 mm (0.375 in.)
Chain guage1.1 mm (0.043 in.)
Chain length12 in.
Chain stop time< 2 s
Drive links quantity40
Chain oil tank capacity120 mL
Weight (without battery pack, guide bar, chain, and oil)2.18 kg
Vibration level (in accordance with EN 60745-1 & EN 60745-2-13)
Front handle5.4 m/s²
Rear handle4.5 m/s²
Uncertainty of measurement1.5 m/s²
Noise emission level (in accordance with EN 60745-1 & EN 60745-2-13)
A-weighted sound pressure level at the operator's position79.6 dB(A)
Uncertainty of measurement2.5 dB
A-weighted sound power level89.9 dB(A)
Uncertainty of measurement1.7 dB

⚠️ WARNING! The declared vibration total values and the declared noise emission values given in this instruction manual have been measured in accordance with a standardised test and may be used to compare one tool with another. They may be used for a preliminary assessment of exposure. The declared vibration and noise emission values represent the main applications of the tool. However, if the tool is used for different applications, used with different accessories, or poorly maintained, the vibration and noise emission may differ. These conditions may significantly increase the exposure levels over the total working period. An estimation of the level of exposure to vibration and noise should take into account the times when the tool is turned off or when it is running idle. These conditions may significantly reduce the exposure level over the total working period. Identify additional safety measures to protect the operator from the effects of vibration and noise, such as maintaining the tool and the accessories, keeping the hands warm (in case of vibration), and organising work patterns.

Battery and Charger

ItemModel
Cordless chainsawR18CHS12 / OCS1825
Battery packRB18L20A
Weight0.43 kg
ChargerRC18115
Compatible battery packsRB18L13, RB18L15, RB18L15A, RB18L20, RB18L20A, RB18L25, RB18L25A, RB18L26, RB18L30, RB18L30A, RB18L40, RB18L40A, RB18L50, RB18L50A, RB18L60, RB18L60A, RB18L90, RB18L90A

Replacement Parts (Bar and Chain)

ManufacturerTRILINKPOWERFIT
ChainCL14340PBPWFTCA1001
BarM1431040-1041RYPCB1040043

The chain must be fitted with the bar from the same manufacturer according to above combinations.

Manufacturer and Importer Information

Imported by:

Techtronic Industries Australia Pty Ltd
31 Gilby Road, Mount Waverley, VIC 3149
Melbourne, Australia

Techtronic Industries N.Z. Limited
Unit C, 70 Business Parade South,
Highbrook, Auckland 2013, New Zealand

RYOBI is a trade mark of Ryobi Limited, and is used under license. TRILINK is a registered trade mark of Trilink Saw Chain, LLC. POWERFIT is a trade mark of Techtronic Outdoor Products Technology Limited in ANZ.

960994131-03

Models: R18CHS12, OCS1825, R18CHS12 One 18V Cordless Electric Chainsaw, One 18V Cordless Electric Chainsaw, Cordless Electric Chainsaw, Electric Chainsaw, Chainsaw

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