Dolmar PS-421 - Manuals

7 4 The saw Parts of the chain saw: illustrations and description of parts see page 17. WARNING ! Never modify a chain saw in any way. Only at- tachments supplied by DOLMAR or expressly approved by DOLMAR for use with the specific saw are authorized. WARNING ! Bow guide bars substantially increase t...

8 6 5 10 feet 5a 6a Chain saw operating instructions For assembly follow the procedure in the appropriate section "Mounting Guide Bar and Chain" of this manual. DOLMAR chain, guide bar and sprocket must match each other (see the appropriate section in this manual). WARNING! Proper tension of...

9 7 Important adjustments WARNING! At correct idle speed, chain should not turn. For di- rections to adjust idle speed, see the appropriate section of this operator’s manual. Do not use a saw with incorrect idle speed adjust- ment. Adjust the idle speed yourself according to the appropriate section ...

0 9 0 2 Position the chain saw in such a way that your body is clear of the cutting attachment whenever the engine is running (fig. 10). Don’t put pressure on the saw when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control an...

To avoid kickback The best protection from personal-injury that may result from kickback is to avoid kickback situations: 1. Hold the chain saw firmly with both hands and maintain a secure grip. 2. Be aware of the location of the guide bar nose at all times. 3. Never bring the nose of the guide bar ...

2 6 4 5 To avoid pushback . Be alert to forces or situations that may cause material to pinch the top of the chain. 2. Do not cut more than one log at a time.. Do not twist the saw when withdrawing the bar from a plunge cut or under buck cut (figures 25 to 27 and 33, pages 14 and 16), because the ch...

45° 45° = cutting down area 2 1 2 17 8 9 /0 ∅ /5 ∅ / 2 " (4cm) 20 2 22 2 45° First clear the tree base and work area from inter- fering limbs and brush and clean its lower portion an axe (see fig. 18). When felling, maintain a distance of at least 2 /2 tree lengths from the nearest person (see f...

4 1 2 3 24 25 26 27 28 Begin the felling cut slighty higher than the felling notch and on the opposite side of the tree (fig. 22). Then cut horizontally through towards the felling notch. Apply the chain saw with its spikes directly behind the uncut portion of wood and cut toward the notch (fig. 23)...

6 1. Relieving cut 2. Cross cut Tension side Pressure side 1. Relieving cut 2. Cross cut Tension side Pressure side 4 5 Maintenance and Repair Never operate a chain saw that is damaged, improperly adjusted or not completely or securely assembled. Follow the maintenance and repair instructions in the...

17 Denomination of components Indicate when ordering spare parts! Identification plate Serial no.Year of manufacture 1 Handle 2 Cover 3 Hood lock 4 Tubular handle 5 Hand guard (release for chain brake) 6 Muffler 7 Spike bar 8 Chain tensioning screw 9 Retaining nuts 10 Chain catch 11 Sprocket guard 1...

8 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 2.80...

9 5 7 6 5 4 12 3 STOP Put on the guide bar ( 7 ). Make sure that the pin ( 5 ) of the chain tensioner engages in the hole in the guide bar. Mounting the guide bar and saw chain Use the universal wrench delivered with the chain saw for the following work.Put the chain saw on a stable surface and carr...

20 2 4 9 11 2 12 3 8 10 9 Replace the sprocket guard ( 3 ). IMPORTANT:Lift the saw chain over the chain catcher (12). Tighten the nuts ( 2 ) only hand-tight to begin with. Lift the chain ( 9 ) over the sprocket ( 8 ). CAUTION: Do not insert the chain between the chain sprocket and the disc. Guide th...

2 STOP 2 4 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!W...

2 6 8 2 9 3 2 10 STOP 2 4 Pull the chain ( 6 ) around the sprocket nose ( 8 ) of the guide bar in the direction of the arrow. Replace the sprocket guard ( 3 ). IMPORTANT:Lift the saw chain over the chain catcher (9). Tighten the nuts ( 2 ) only hand-tight to begin with. Tensioning the saw chain Turn...

24 1 2 3 4 7 9 8 6 5 STOP Mounting the guide bar and saw chain Place the saw on a stable surface and perform the following work steps in order to install the guide bar and saw chain:Release the chain brake by pulling the hand guard ( 1 ) in direc- tion of arrow.Fold up the sprocket guard quick tensi...

26 1 2 1 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!Whe...

27 Chain oil Use an oil with adhesive additive for lubricating the chain and guide bar. The adhesive additive prevents the oil from being flung off the chain too quickly. We recommend the use of chain oil which is bio-degradable in order to protect the environment. The use of bio-degradable oil may ...

28 STOP Refuelling FOLLOW THE SAFETY PRECAUTIONS! Be careful and cautious when handling fuels.The engine must be switched off! Thoroughly clean the area around the caps, to prevent dirt from getting into the fuel or oil tank.Unscrew the tank cap (use the universal wrench if necessary, see illustrati...

29 2 3 1 + - STOP Checking the chain lubrication Never work with the chain saw withoute sufficient chain lubri- cation. Otherwise the service life of the chain and guide bar will be reduced. Before starting work check the oil level in the tank and the oil feed.Check the oil feed rate as described be...

0 STOP 1 4 5 3 2 STOP ON Starting the engine Do not start the chain saw until after it is completely as- sembled and checked! Move at least meters / 0 feet away from the place where the chain saw was fuelled. Make sure you have a secure footing, and place the saw on the ground in such a way that the...

7 8 Working in winter In order to prevent carburetor icing in conditions of low tempe- rature combined with high humidity, and below + 40°F (+ 5°C) in order to get up to operating temperature faster, heated air can be taken from the cylinder. Remove the cover (see “Cleaning the air filter”). Remove ...

2 S H L SERVICE Adjusting the carburetor CAUTION: Carburetor adjustment may only be done by a specialist DOLMAR service center! Do not undertake any adjustments to adjusting screws (H) and (L) without a tachometer! Incorrect adjustment can lead to engine damage!A tachometer is needed for adjustments...

α α β β min. 0.11” (3 mm) STOP The sharpening angle (α) must be identical for all cutters! 30° for chain type 092, 484 The teeth will have the proper angle (ß) automatically if the proper round file is used. 80° for chain type 092, 484 Different angles result in a roughly, irregularly running chain,...

4 1 2 4/5 Chain typ 484 (.25") Chain typ 092 (/8") Files and how to work with them Use a special saw chain round file for sharpening. Standard round files are unsuitable. For the order number, see “Accessories”. Type 484 : File the first cutter half with a 3/16” (4,8 mm) dia. round saw-chain...

5 Cleaning the inside of 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 protective gloves!CAUTION: Start the chain saw only after having assembled it com...

6 8 12 1 1 9 Check the sprocket before mounting a new chain.Worn out sprockets ( 8 ) may damage the new chain and must therefore be replaced.Remove the sprocket guard (See „PUTTING INTO OPERA- TION“).Remove the chain and guide bar.Remove circlip ( 9 ). CAUTION: The circlip will pop out of the groove...

37 Cleaning the air filter 1 2 7 3 4 5 3 4 6 CAUTION: To prevent eye injury, always wear eye protection when cleaning the filter with compressed air!Do not use fuel to clean the air filter. Unscrew the hood lock ( 1 ) counter-clockwise and remove the hood ( 2 ). Push up the combination switch ( 3 ) ...

8 11 12 13 STOP Replacing the spark plug CAUTION:Do not touch the spark plug or plug cap if the engine is running (high voltage).Switch off the engine before starting any maintenance work. A hot engine can cause burns. Wear protective gloves! The spark plug must be replaced in case of damage to the ...

9 1 2 9 4 10 12 11 78 6 5 13 3 14 Replacing the starter cable/ Replacing the return spring pack/Replacing the starter spring Unscrew four screws ( 1 ). Remove fan housing ( 2 ). Remove the air guide ( 3 ) from the fan housing. CAREFUL! Injury hazard! Do not unscrew screw (7) if the return spring is ...

40 16 Replacing the fuel filter The felt filter ( 16 ) of the suction head can become clogged. It is recommended to replace the suction head once every three months in order to ensure unimpeded fuel flow to the carburetor.To remove the suction head for replacement, pull it out through the tank fille...

4 General Chain saw Clean exterior, check for damage. In case of damage, have repaired by a qualified service center immediately Saw chain Sharpen regulary, replace in good time -4 Chain brake Have inspected regularly at an authorized service center Guide bar Turn over to ensure even wear of bearing...

42 Service, spare parts and guarantee Maintenance and repair The maintenance and repair of modern engines as well as all safety devices require qualified technical training and a special work - shop equipped with special tools and testing devices.Any work not described in this Manual may be performe...

4 Trouble shooting Malfunction System Observation Cause Chain does not run Chain brake Engine runs Chain brake actuated. Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com- only with difficulty pression system, mechanical malfunction. No ignition spark STO...

44 Extract from the spare 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

48 Specifications subject to change without notice Changements sans préavis Form: 995 701 380 (7.1 1 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 reprod...