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Operator’s and Safety Manual
for Gasoline Chain Saws
WARNING!
Read and understand this Manual. Always follow safety precautions in the Operator’s and Safety Manual.
Improper use can cause serious injury!
Preserve this Manual carefully!
WARNING!
FUELS WITH MORE THAN 10% ETHANOL ARE NOT APPROVED FOR USE IN DOLMAR 2-STROKE ENGINES!
Use of alternative fuels, such as E-20 (20% ethanol), E-85 (85% ethanol) or any fuels not meeting DOLMAR
requirements are not approved for use in DOLMAR 2-stroke
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EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE DOLMAR warrant to the initial retail purchaser and each subsequent owner, that this utility equipment was designed, built, and equipped to conform at the time of initial sale to all applicable regulations of the U.S. Environmental Protection Agency (EPA), and that the engine is free of defects in materials and workmanship which would cause this engine to fail to conform with EPA regulations during its warranty period. For the components listed unde
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WARNING ! Careless or improper use of this product can cause serious or even fatal injury. Before operating a chain saw or other DOLMAR products it is important that you read, fully understand and carefully follow the instructions outlined in this operator’s manual. Kickback may cause severe or fatal injury and is one of many potential dangers in operating a chain saw. Kickback and other safety related precautions are described in detail within this operator’s manual. Additional operator’s m
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Delivery inventory 2 3 4 1 Chain saw 2 Guide bar 5 6 7 1 3 Saw chain 4 Chain protection cover 5 Universal wrench 6 Wrench 7 Screw driver for carburetor adjustment In case one of the parts listed should not be included in the delivery inventory, please consult your sales agent. 8 Operator’s and Safety Manual (not shown) Symbols You will notice the following symbols on the chain saw and in the Operator’s and Safety Manual: Read Operator’s and Safety Manual and follow the warning- and safety Ca
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Safety precautions for chain saw operators Additional safety precautions While operating the chain saw please observe the The following additional safety precautions must be following rules: observed by all users of chain saws: a) Contact of the guide bar nose with any object . Do not operate a chain saw when you are fatigued. should be avoided. 2. Use safety footwear; snug-fitting clothing; protec- b) Tip contact may cause the guide bar to move tive gloves; and eye, hearing, and he
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O max. CKA 45 Maximum Computed Kickback Angle General Safety Precautions (CKA)* without using the chain brake when using the recommended bar and chain The use of any chain saw may be hazardous. At full combinations (In this example the CKA is 45°). throttle chain speed can reach 45 mph (20 m/s). It is important that you read; fully understand and observe O max. CKA 40 MaximumComputed Kickback Angle the following safety precautions and warnings. Read (CKA)* with using the chain brake w
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The saw Proper clothing Parts of the chain saw: illustrations and description of Clothing must be sturdy and snug-fitting, but allow parts see page 17. complete freedom of movement. Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, or anything that could become entangled with the saw WARNING ! or brush. Wear overalls or jeans with a reinforced cutting resistant insert (fig. 3). Never modify a chain saw in any way. Only at- tachments supplied by DOLMAR or expre
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Wipe off any spilled fuel before starting your saw and Chain saw operating instructions check for leakage. For assembly follow the procedure in the appropriate Check for fuel leakage while refueling and during opera- section "Mounting Guide Bar and Chain" of this manual. tion. If fuel or oil leakage is found, do not start or run DOLMAR chain, guide bar and sprocket must match each the engine until leak is fixed and spilled fuel has been other (see the appropriate section in this manual). w
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Wrap your fingers tightly around the handles, keeping Important adjustments the handles cradled between your thumb and forefin- ger (fig. 7). With your hands in this position, you can WARNING! best oppose and absorb the push, pull and kickback At correct idle speed, chain should not turn. For di- forces of your saw without having it slip out of your rections to adjust idle speed, see the appropriate grip (see section of reactive forces). Make sure your section of this operator’s manual. ch
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9 In order to keep control of your saw, always maintain a firm foothold. Never work on a ladder, in a tree or on any other insecure support. Never use the saw above shoulder height (fig. 9). 0 Position the chain saw in such a way that your body is Kickback: clear of the cutting attachment whenever the engine Kickback occurs when the upper quadrant of the bar is running (fig. 10). nose contacts a solid object in the wood or is pinched (fig. 11). The reaction of the cutting force of th
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Many factors influence the occurence and force of the kickback reaction. The type of bar and saw chain you use is a factor in the force of the kickback reaction. The speed of contact at which the cutter contacts the object. Kickback force increase with the rate of impact. The contact angle between the nose of the bar and the foreign object (fig. 11). Kickback is most pronounced in the upper quadrant of the bar nose. To avoid kickback DOLMAR chain types are designed to reduce kickback
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Pushback: To avoid pull-in Pushback occurs when the chain on the top of the . Always start a cut with the chain rotating at full speed bar is suddenly stopped when it is pinched, caught and the spike bar in contact with the wood. or encounters a foreign object in the wood. The reac- tion of the chain drives the saw straight back toward 2. Pull-in may also be prevented by using plastic the operator causing loss of saw control. Pushback wedges to open the kerf or cut. fre-quently occurs when
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45° 1 2 2 First cut 45° Second cut = cutting down area 20 17 When felling, maintain a distance of at least 2 /2 tree If the tree has large buttress roots, cut into the largest lengths from the nearest person (see fig. 17). buttresses vertically first (horizontally next) and remove (fig. 20). Note: The noise of your engine may drown any warning call. Felling instructions: Direction of fall 2 8 First clear the tree base and work area from inter- Felling cut fering limbs and brush and clean it
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Begin the felling cut slighty higher than the felling notch Plunge-Cut Method and on the opposite side of the tree (fig. 22). Then cut Timber having a diameter more than twice the length horizontally through towards the felling notch. Apply of the guide bar reauires the use of the plunge-cut the chain saw with its spikes directly behind the uncut method before making the felling cut. portion of wood and cut toward the notch (fig. 23). First, cut a large, wide notch. Make a plunge cut in t
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Bucking 3 Bucking is cutting a log into sections. 2 29 1 WARNING! There is an extreme danger of kickback at this point. Extra caution must be taken to maintain control of the saw. To make the felling cut, follow WARNING! the sectioning method described previously (fig. . When bucking, do not stand on the log. Make 29). If you are inexperienced with a chain saw sure the log will not roll down-hill. If on a slope, plunge-cutting should not be attempted. Seek the stand on the up-hill
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Maintenance and Repair Never operate a chain saw that is damaged, improperly adjusted or not completely or securely assembled. 1. Relieving cut Follow the maintenance and repair instructions in the Pressure side appropriate section of this manual. Tension side 2. Cross cut WARNING ! Always stop the engine and make sure that the chain is stopped before commencing any mainte- nance or repair work or cleaning the saw. Allow the chain saw to cool off before doing any maintenance work (burn
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Denomination of components 4 5 1 2 3 6 7 8 9 14 13 12 11 10 27 26 25 15 16 17 Identification plate 18 19 Serial no. 6 " (400mm) 0 2 4 56 Year of manufacture 528.092.056 4 2.040.66 DOLMAR GmbH, 22045 Hamburg, Germany XXX.XXX. XXX Typ 94 Indicate when ordering spare parts! 24 23 22 21 20 1 Handle 15 Starter grip 2 Cover 16 Combination switch (Choke / Start / Stop) 3 Hood lock 17 Fuel pump (Primer) 18 Throttle lever 4 Tubular handle 19 Safety locking button 5 H
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Technical data PS-351 PS-421 Stroke volume cu. in (cm) 2.1 (34,7) 2.6 (42,4) Bore inch (mm) .50 (8) .65 (42) Stroke inch (mm) .20 (0,6) .20 (0,6) Max. power at speed hp / rpm 2,3 / 9.500 2,9 / 9.500 Max. torque at speed Nm /rpm 2,1 / 6.500 2,6 / 6.500 Idling speed / max. engine speed with bar and chain rpm 2.800 / 13.500 2.800 / 13.500 Coupling speed rpm 5.00 5.00 Sound pressure level at the operator´s ear at full load according to ANSI B 175.1 dB(A) 100,8 100,8
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PUTTING INTO OPERATION Only for models with fastening nuts on the sprocket guard STOP CAUTION: Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see „Replacing the spark plug“). Always wear protec- tive gloves! CAUTION: Start the chain saw only after having assembled it com- pletely and inspected. Mounting the guide bar and saw chain Use the universal wrench delivered with the chain saw for the following work. Put the cha
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Lift the chain (9) over the sprocket (8). CAUTION: Do not insert the chain between the chain sprocket and the disc. Guide the chain from above about halfway into the groove (10) on the guide bar. CAUTION: Note that the cutting edges along the top of the chain must 9 8 point in the direction of the arrow! 10 9 11 Pull the chain (9) around the sprocket nose (11) of the guide bar in the direction of the arrow. Replace the sprocket guard (3). IMPORTANT: Lift the saw chain over the chain catch
