Craftsman 172.34120 Operator's Manual

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Contents

18ASSEMBLY & ADJUSTMENTS cont.CAUTION: The chain saw is NOT supplied filled with oil. It is essential to fill with oilbefore use. Never operate the chain saw without chain oil or at an empty oil tank level, asthis will result in extensive damage to the product. Chain life and cutting capacity depends onoptimum lubrication. Therefore, the chain is automatically oiled during operation via oil outlet!LUBRICATIONFilling oil tank: (See Fig. 6)1. Set chain saw on any suitable surface with oil filler cap facing upward.2. Clean area around the Oil Filler Cap with cloth and unscrew the cap by turningit counter clockwise.3. Add bar and chain oil (Craftsman Bar & Chain Oil, SAE30) until reservoir is full.4. Avoid dirt or debris entering oil tank, re-screw oil filler cap and tighten.CAUTION: To allow venting of the oil reservoir, small breather channels areprovided between the oil filler cap and the strainer. To prevent leakage, ensure machine isleft in a horizontal position (oil filler cap uppermost) when not in use.It is important to use only the recommended oil to avoid damage to the chain saw.Never use recycled/old oil. Use of non approved oil will invalidate the warranty.!Fig. 619CHAINSAW OPERATION TERMSBucking – The process of cross cutting a felled tree or log into lengths.Chain Stop Lever – A device used to stop the chain saw.Chain Saw Power Head – A chain saw without the saw chain and guide bar.Drive Sprocket or Sprocket – The toothed part that drives the saw chain.Felling – The process of cutting down a tree.Felling Back Cut – The final cut in a tree felling operation made on the opposite side ofthe tree from the notching undercut.Front Handle – The support handle located at or toward the front of the chain saw.Front Hand Guard – A structural barrier between the front handle of a chain saw andthe guide bar, typically located close to the hand position on the front handle and sometimesemployed as an activating lever for a chain brake.Guide Bar – A solid railed structure that supports and guides the saw chain.Kickback – The backward or upward motion, or both of the guide bar occurring when thesaw chain near the nose of the top area of the guide bar contacts any object such as a logor branch, or when the wood closed in the pinches the saw chain in the cut.Kickback, Pinch – The rapid pushback of the saw which can occur when the wood closesin and pinches the moving saw chain in the cut along the top of the guide bar.Kickback, Rotational – The rapid upward and backward motion of the saw which can occurwhen the moving saw chain near the upper portion of the tip of the guide bar contacts anobject, such as a log or branch.Low-Kickback Chain – A chain that complies with the kickback performance requirementsof ANSI B175.1-1991 when tested on a representative sample of chain saws.Normal Cutting Position – Those positions assumed in performing the bucking and fellingcuts.Notching Undercut – A notch cut in a tree that directs the tree’s fall.Oiler Control – A system for oiling the guide bar and saw chain.Rear Handle – The support handle located at or toward the rear of the saw.Reduced Kickback Guide Bar – A guide bar which has been demonstrated to reducekickback significantly.Replacement Saw Chain – A chain that complies with the kickback performancerequirements of ANSI B175.1-1991 when tested with specific chain saws. It may not meetthe ANSI performance requirements when used with other saws.Saw Chain – A loop of chain having cutting teeth, that cut the wood, and that is driven bythe motor and is supported by the guide bar.Spiked Bumper (Gripping Teeth) – The pointed tooth or teeth for use when felling or buckingto pivot the saw and maintain position while sawing.Switch – A device that when operated will complete or interrupt an electrical power circuitto the motor of the chain saw.Switch Linkage – The mechanism that transmits motion from a trigger to the switch.Lock-off Button – A movable stop that prevents the unintentional operation of the switchuntil manually actuated.