Dolmar PS-351 Operator's and safety manua Operator'S And Safety Manual Download Page 46

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Summary of Contents for PS-351 Operator's and safety manua

Page 1: ...s E 20 20 ethanol E 85 85 ethanol or any fuels not meeting DOLMAR requirements are not approved for use in DOLMAR 2 stroke gasoline engines USE OF ALTERNATIVE FUELS CAN CAUSE THE FOLLOWING PROBLEMS Poor engine performance loss of power overheating fuel vapor lock improper clutch engagement premature deterioration of fuel lines premature deterioration of gaskets premature deterioration of carbureto...

Page 2: ...ent part or malfunction of authorized parts due to use of non authorized parts OWNER S WARRANTY RESPONSIBILITIES As the engine owner you are responsible for the performance of the required maintenance listed in your operator s manual DOLMAR recommends that you retain all receipts covering maintenance on your engine but DOLMAR cannot deny warranty solely for the lack of receipts or for your failure...

Page 3: ...cation 29 Starting the engine 30 Stopping the engine 30 Checking the chain brake 31 Working in winter 31 Adjusting the carburetor 32 Sharpening the saw chain 33 34 Cleaning the brake band and sprocket interior 35 Cleaning the guide bar 35 Replacing the saw chain 36 Cleaning the air filter 37 Replacing the spark plug 38 Checking the muffler screws 38 Replacing the starter cable 39 Replacing the ret...

Page 4: ...r adjustment 8 Operator s and Safety Manual not shown Further symbols see page 6 Caution kickback Chain brake Fuel and oil mixture Normal Winter operation Carburetor adjustment Chain oil fill oil pump Saw chain oil adjustment screw First aid Do not touch hot surfaces Recycling Read Operator s and Safety Manual and follow the warning and safety precautions Particular care and caution Forbidden Wear...

Page 5: ... main ten ance instructions for the saw chain F Only use replacement bars and chains speci fied by the manufacturer or the equivalent Additional safety precautions The following additional safety precautions must be observed by all users of chain saws 1 Do not operate a chain saw when you are fatigued 2 Use safety footwear snug fitting clothing protec tive gloves and eye hearing and head protectio...

Page 6: ...NG Prolongeduseofchainsawsexposingtheoperator tovibrationsmayproduceWhitefingerdisease Ray naud s phenomenon This phenomenon reduces the hand s ability to feel and regulate temperature produces numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis All DOLMAR saws are therefore provided with an antivibration system which is essential for those using chain sa...

Page 7: ...aw the bar should be behind you fig 4 By vehicle When transporting in a vehicle keep chainandbarcoveredwiththechainguard Properly secure your saw to prevent turnover fuel spillage and damage to the saw Make sure the saw in not exposed to heat or sparks Proper clothing Clothing must be sturdy and snug fitting but allow complete freedom of movement Avoid loose fitting jackets scarfs neckties jewelry...

Page 8: ...he fuel tank while the engine is running Starting Do not drop start This method is very dangerous be cause you may lose control of the saw fig 6 WARNING Gasoline is an extremely flammable fuel Use ex treme caution when handling gasoline or fuel mix Do not smoke or bring any sparks or flame near the fuel fig 5 Fueling instructions Fuel your chain saw in well ventilated areas or out doors Always shu...

Page 9: ... Always hold the saw firmly with both hands when the engine is running Place your left hand on the tubular handle and your right hand on grip and throttle lever Left handers should follow these instructions too WARNING Do not operate your chain saw in semi throttle position Cutting in this position does not permit the operator proper control of the saw or chain speed WARNING Never come too close t...

Page 10: ...n derstanding of the causes of these reactive forces may help you avoid loss of control The most common reactive forces are kickback pushback pull in 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 This reaction can occur in a fraction of a second and under some circ...

Page 11: ...th 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 DOLMAR chain types are designed to reduce kickback forces The depth gauges Improper lowering of the depth gauges also increases the risk of a kickback Saw chain cutter sharpness WARNING A dull improperly sharpened chain may increase the...

Page 12: ...lso be prevented by using plastic wedges to open the kerf or cut Cutting techniques Felling Felling is cutting down a tree Before felling a tree consider carefully all conditions which may affect the direction of fall including The intended direction of the fall The neutral lean of the tree Any unusually heavy limb structure Surrounding trees and obstacles The wind direction and speed WARNING Alwa...

Page 13: ...ust also be selected Place all tools and equipment a safe distance away from the tree but not on the escape path Then determine the placement of the felling notch fig 21 The felling notch when properly placed de termines the direction in which the tree will fall It is made perpendicular to the line of fall and should be as close to the ground as possible Cut the felling notch to a depth of about o...

Page 14: ...a diameter greater than the length of the guide bar requires use of either the sectioning or plunge cut method These methods are extremely dangerous because they involve the use of the nose of the guide bar and can result in kickback Only properly trained professionals should attempt these techniques For the sectioning method fig 24 make the first cut with the guide bar fanning in toward the hinge...

Page 15: ...ground fig 30 Always cut from the top of the limb Do not underbuck freely hang ing limbs A pinch may result or the limb may fall causing loss of control If a pinch occurs stop the engine and remove the saw by lifting the limb WARNING Be extremely cautious when cutting limbs under tension The limbs could spring back toward the operator and cause loss of control of the saw or injury to the operator ...

Page 16: ... bar and sprocket clean and lubricated replace worn sprockets or chains Keep the chain sharp You can spot a dull chain when easy to cut wood becomes hard to cut and burn marks appear on the wood Keep the chain at proper tension Tighten all nuts bolts and screws except the carburetor adjustment screws after each use Keep spark plug and wire connection tight and clean Store saws in a high or locked ...

Page 17: ...mp bottom side 13 Fuel pump Primer 14 Identification plate 15 Starter grip 16 Combination switch Choke Start Stop 17 Fuel pump Primer 18 Throttle lever 19 Safety locking button 20 Rear hand guard 21 Fuel tank cap 22 Adjusting screws for carburetor 23 Fan housing with starting assembly 24 Oil tank cap 25 Chain Blade 26 Guide bar 27 Sprocket guard quick tensioner 2 26 25 16 15 18 17 19 3 4 1 6 7 5 8...

Page 18: ...ank capacity floz 16 2 Chain oil tank capacity floz 9 5 Mixture ratio fuel two stroke oil when using DOLMAR High Performance oil 50 1 when using other synthetic oils oil quality must be JASO FC or ISO L EGD 50 1 Chain brake engages manually or in case of kickback Sprocket pitch inch 3 8 3 8 Number of teeth Z 6 6 Chain type see the Extract from the spare parts list Pitch gauge inch mm 3 8 0 050 1 3...

Page 19: ...by pulling the hand guard 1 in direc tion of arrow Unscrew retaining nuts 2 Pull off the sprocket guard 3 PUTTING INTO OPERATION Only for models with fastening nuts on the sprocket guard 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...

Page 20: ...the top of the chain must point in the direction of the arrow Tightening the saw chain Turn the chain tensioning screw 4 to the right clockwise until the saw chain catches in the groove on the lower side of the guide bar see circle Slightly lift the end of the guide bar and turn the chain adjusting screw 4 to the right clockwise until the chain rests against the bottom side of the guide bar While ...

Page 21: ...st be switched off NOTE It is recommended to use 2 3 chains alternatively In order to guarantee uniform wear of the guide bar the bar should be turned over whenever replacing the chain Retightening the saw chain Loosenthenuts 2 aboutoneturnwiththeuniversalwrench Raise the tip of the guide bar a little and turn the chain tensioning screw 4 to the right clockwise until the saw chain is again up agai...

Page 22: ...e bar and saw chain Release the chain brake by pulling the hand guard 1 in direc tion of arrow Unscrew retaining nuts 2 Pull off the sprocket guard 3 Only for the QuickSet guide bar 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...

Page 23: ...en turned over turn the chain tensioner to left i e counter clockwise to tighten the chain Checking the chain tension The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand While doing so the chain brake must be released Check the chain tension frequently new chains tend to get longer during use When checking the chain...

Page 24: ...clockwise to bring it back to its original position Repeat this procedure until the sprocket guard 4 is unscrewed Remove the sprocket guard 4 Lift the chain 8 over the sprocket 7 CAUTION Do not insert the chain between the chain sprocket and the disc Guide the chain from above about halfway into the groove 9 on the guide bar CAUTION Note that the cutting edges along the top of the chain must point...

Page 25: ...the saw chain Simultaneously push in hard on the sprocket guard quick ten sioner 2 and turn it clockwise to screw the sprocket guard on but do not yet tighten it Raise the tip of the guide bar slightly and turn the chain tensioner 3 clockwise until the saw chain is flush against the bottom of the guide bar see circle Push the sprocket guard quick tensioner 2 in again and tight en by turning clockw...

Page 26: ...den acceleration of the guide bar combined with the inertia of the hand guard 1 will automatically actuate the chain brake To engage the chain brake manually simply push the hand guard 1 forward towards the tip of the saw with your left hand arrow 1 Releasing the chain brake Pull the hand guard 1 towards you arrow 2 until you feel it catch The brake is now released Chain brake The PS 351 and PS 42...

Page 27: ...vailable in the following sizes 2 6 oz order number 986 100 100 6 4 oz order number 986 100 101 In case DOLMAR High Performance two stroke engine oil is not available it is recommended to use a mixture ratio of 50 1 with other synthetic two stroke engine oils as otherwise optimum operation of the engine cannot be guaranteed The correct mixture ratio 50 1 when using DOLMAR High Performance two stro...

Page 28: ...l pump and the sawing device In case of damage caused by using waste oil or unappropriate chain oil the product guarantee will be null and void Your salesman will inform you about the use of chain oil AVOID SKIN AND EYE CONTACT Mineral oil products degrease your skin If your skin comes in contact with these substances repeatedly and for an extended periodoftime itwilldesiccate Variousskindeseasesm...

Page 29: ...ct Place the saw on a suitable surface To ensure troublefree operation of the oil pump the oil guide groove at the crank case 2 and the oil inlet bore in the guide bar 3 must be cleaned regularly Note After the saw has been turned off it is normal for residual chain oil to drip from the oil feed system the guide bar and the chain for a time This does not constitute a defect Place the saw on a suit...

Page 30: ...ock button 3 is actuated by the palm of the hand and press the throttle trigger 4 CAUTION The engine must be put in idle immediately after starting If this is not done the clutch can be damaged Now disengage the chain brake Warm starting As described above for cold starting but before starting push the combination switch 1 up Choke position and then right away back to the middle ON position This i...

Page 31: ...the cover back on 6 Symbol visible Normal operation Symbol visible Winter operation STOP Checking the chain brake The chain brake must be checked before every use of the saw Start the engine as described above have a secure footing place the chain saw on the ground so that the chain and guide bar are not near anything Hold the front handle firmly with your other hand on the rear grip Let the engin...

Page 32: ...ndertaken when the engine is warm with a clean air filter and properly in stalled guide bar and chain Use a screwdriver 5 32 4 mm blade for idle adjustments Adjusting the idle speed Turn adjusting screw S counter clockwise unscrew Idle speed decreases Turn adjusting screw S clockwise screw in Idle speed increases Important If the saw chain still moves during idle even after you have adjusted the i...

Page 33: ...even sharpening of the chain Important Sharpen frequently but without removing too much metal Generally 2 or 3 strokes of the file will be enough Have the chain resharpened at a service center when you have already sharpened it yourself several times Proper sharpening CAUTION Use only chains and guide bars designed for this saw see the Extract from the spare parts list All cutters must be of the s...

Page 34: ...utters of the chain New saw teeth must be filed to the exact same shape as the used teeth including on their running surfaces File depending on chain type 90 or 10 to the guide bar A file holder makes file guidance easier It is marked for the correct sharpening angle of α 25 α 30 α 35 keepthemarksparallelwiththechainwhenfiling seeillustration and limits the cut depth to the correct 4 5 of the file...

Page 35: ...residues or foreign matter remaining in the oil guide groove 4 or on the chain tensioner 5 To install the guide bar saw chain and sprocket guard see PUTTING INTO OPERATION for the correct model NOTE The chain brake is a very important safety device and like any other component subject to normal wear and tear Regular inspection and maintenance are important for your own safety and must be done by a...

Page 36: ...d new circlip 9 for the part numbers see Extract from the spare parts list For replacing the guide bar chain and sprocket see PUTTING INTO OPERATION NOTE Don t use a new chain on a worn chain sprocket By the time 2 chains have worn the sprocket has become worn out so it should be replaced at least at every second chain replace ment To distribute the chain oil evenly run a new chain at half throttl...

Page 37: ...t the fleece filter does not need to be cleaned until there is a noticeable loss of power If cleaning the filter does not bring an improvement in performance it is time to replace it Cleaning the nylon filter Use a soft brush or blow out dirt from the inside with compressed air If the filter is very dirty it can be washed in lukewarm water with regular dishwashing detergent Clean frequently severa...

Page 38: ...ol between hood and cylinder as shown CAUTION Do not insert the combination tool into the spark plug hole Make contact only with the cylinder oth erwise you might damage the engine Using insulated pliers press the unscrewed spark plug 9 against the combination tool away from the spark plug hole with the spark plug cap firmly on the plug Put combination switch 10 in the ON position Pull the starter...

Page 39: ...The spring will wind the cable around the drum Repeat the procedure once The starter grip should now stand straight up on the fan housing NOTE With the cable pulled all the way out it must still be possible to turn the pulley another 1 4 turn against the return spring CAUTION Danger of injury Secure the cable grip when pulled out It will whip back if the cable pulley is released by accident Replac...

Page 40: ... Topreventeyeinjury alwaysweareyeprotection when cleaning the filter with compressed air The entire area 15 can now be brushed clean or cleaned with compressed air Cleaning the cylinder fins A bottle brush can be used to clean the cylinder fins 17 19 18 Replacing cleaning the spark arrester screen The spark arrester screen should be checked and cleaned regulary Loosen the screws 17 and remove the ...

Page 41: ...n compartment Clean to maintain good cooling air flow 40 Cylinder fins Clean to maintain good cooling air flow 40 Spark plug Check and replace if necessary 38 Muffler Check tightness of mounting Check screws 17 38 Chain guide Check 17 Screws and nuts Check their condition and that they are firmly secured Spark arrester screen Clean or replace if necessary 40 Every 3 months Fuel filter Replace 40 F...

Page 42: ...omatically invalidate the DOLMAR product guarantee Guarantee DOLMAR guarantees the highest quality and will therefore reimburse all costs for repair by replacement of damaged parts resulting from material or production faults occurring within the guarantee period after purchase Please note that in some countries particular guarantee conditions may exist If you have any questions please contact you...

Page 43: ...ylinder or piston rings defective Outside Spark plug does not seal Mechanical Starter does not engage Spring in starter broken broken parts malfunction inside the engine Warm start difficulties Carburetor Fuel tank is filled Wrong carburetor adjustment Ignition spark Engine starts but Fuel supply Fuel tank is filled Wrong idling adjustment suction head or dies immediately carburetor dirty Tank ven...

Page 44: ...are parts list Use only original DOLMAR parts For repairs and replacement of other parts see your DOLMAR service center PS 351 PS 421 17 24 8 9 7 10 22 20 6 5 19 1 2 3 14 18 13 11 12 21 23 4 15 16 26 33 27 28 29 30 31 32 25 ...

Page 45: ...ch SW 13 16 5 940 827 000 1 Offset screwdriver 6 944 340 001 1 Carburetor screwdriver 7 320 163 447 1 Fuel filter 8 181 114 202 1 Fuel tank cap cpl 9 963 229 036 1 O Ring 29 3 x 3 6 mm 10 195 160 050 1 Return spring pack complete 11 195 160 030 1 Spring 12 195 160 020 1 Driver 13 195 160 060 1 Starter cable 0 14 x35 4 3 5x900 mm 14 965 603 040 1 Spark plug 15 181 114 202 1 Oil tank cap cpl 16 963 ...

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Page 48: ...hangements sans préavis Form 995 701 380 7 11 GB DOLMAR POWER PRODUCTS PO Box 5007 Alpharetta GA 30005 5007 The engine exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm ...

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