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Makita DPC7331HD Instruction And Safety Manual

Gasoline power cuts
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Read and understand this Manual. Always follow safety precautions in the Instruction and
Safety Manual. Improper use can cause serious injury!
The engine exhaust from this product contains chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm. Preserve this Manual carefully!
Instruction and Safety Manual
for Gasoline Power Cuts
DPC7331HD
DPC7341HD
WARNING!

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Summary of Contents for Makita DPC7331HD

  • Page 1 Instruction and Safety Manual for Gasoline Power Cuts DPC7331HD DPC7341HD WARNING! Read and understand this Manual. Always follow safety precautions in the Instruction and Safety Manual. Improper use can cause serious injury! The engine exhaust from this product contains chemicals known to the State of California to cause...
  • Page 2 EPA regulations during its warranty period. For the components listed under PARTS COVERED, the service dealer authorized by MAKITA will, at no cost to you, make the ne- cessary diagnosis, repair, or replacement necessary to ensure that the engine complies with applicable U.S. EPA regulations.

  • Page 3: Table Of Contents

    Packing To reduce your exposure to these chemicals: work in Your MAKITA Power Cut is packed in a cardboard box to pre- a well ventilated area, and work with approved safety vent shipping damage.

  • Page 4: Delivery Inventory

    Delivery inventory 1. Power Cut 2. Cutting disc 3. Adapter ring 20/25.4 4. Screwdriver (for carburetor adjustment) 5. Offset screwdriver 6. Universal wrench 13/19 In case one of the parts listed should not be included in the 7. Instruction manual (not shown) delivery inventory, please consult your sales agent.

  • Page 5: Safety Precautions Intended Use

    SAFETY PRECAUTIONS Intended use Power Cut Use the Power Cut cutoff saw outdoors only, for trimming and cutting wear protective goggles (C) or visor when using the Power suitable materials, using cutting discs rated for this machine. Cut. Improper use: To prevent hearing damage, always wear suitable personal hearing protection.

  • Page 6: Fuels / Refuelling

    Always wear safety shoes or boots (G) with steel toes, non-skid soles, and leg protectors when working with the Power Cut. Safety shoes equipped with a protective layer provide protection against cuts and ensure a secure footing. Always wear a work suit (H) of tough material with sufficient flame-retardant qualities whenever working with the cutoff saw.

  • Page 7: Cutting Discs

    Cutoff discs The protection hood must always be on! Change discs only with the engine off! There are two basic types of cutoff discs: - For metal (hot cutting) - For masonry (cold cutting) WARNING! Never use carbide tipped, circular saw blades or any kind of wood cutting blades.

  • Page 8: Kickback And Lock-In

    Kickback and lock-in When working with the Power Cut there is a danger of kickback and lock-in. Kickback occurs when the top of the cutting disc is used for cutting (15). This causes the Power Cut to be thrown back toward the user with great force and out of control.

  • Page 9: Cutting Metal

    When using synthetic resin cutting discs, always ob- Cutting masonry and concrete serve the following: IMPORTANT! Always wear approved respiratory protection! CAUTION: Asbestos and other materials that can release toxic sub- Synthetic resin cutting discs can absorb moisture. This stances may be cut only after notifying the proper authorities moisture can cause the disc to become unbalanced at high and under their supervision or that of a person appointed speed.

  • Page 10: Transport And Storage

    In wet cutting, the disc is wetted at an equal rate on both sides by a trickle of water. MAKITA offers the right accessories for all wet cutting applications (see also "SPECIAL ACCESSORIES"). Remove foreign objects such as sand, stones and nails found within the working area.

  • Page 11: Maintenance

    All other work must be carried out by MAKITA Service. Use only original MAKITA spares and accessories. The use of non-MAKITA spares, accessories, or cutting discs increases the risk of accident. We cannot accept any respon- sibility for accidents or damage occurring in association with the use of cutting discs or accessories other than original MAKITA.

  • Page 12: Technical Data

    Fuel tank capacity fl oz (l) 37 (1,1) Mixture ratio (fuel/two-stroke oil) - when using MAKITA Synthetic oil 50:1 - when using other synthetic oil (quality grade JASO FC or ISO EGD) 50:1 Cutting disc for 80 m/sec. 14" / 1" / 0."...

  • Page 13: Putting Into Operation

    PUTTING INTO OPERATION CAUTION: Always turn off the engine and pull off the spark plug cap before doing any work on the Power Cut! Always wear protective gloves! CAUTION: Start the Power Cut only after complete assembly and inspection. For the the following work, use the assembly tools included with delivery: 1.

  • Page 14: Tightening The V-Belt / Checking V-Belt Tension

    The correct mixture ratio: 50:1 When using MAKITA synthetic two-stroke engine To lubricate the engine, use a synthetic oil for two-stroke air- oil, i. e. 50 parts gasoline to 1 part oil.
  • Page 15 The Storage of Fuel MAKITA synthetic two-stroke engine oil (50:1) is available in the following sizes to suit your individual requirements: Fuels have a limited storage life. Fuel and fuel mixtures age through evaporation, especially at high temperatures. 2.6 floz. order number T-00745 Aged fuel and fuel mixtures can cause starting problems and damage the engine.Purchase only that amount of fuel,...

  • Page 16: Starting The Engine

    Starting the engine necessary This model is fitted with a semiautomatic decompression valve (1) to make starting easier. Depressing it reduces the force needed for compression, so little force is needed to accelerate the engine to its starting speed. The high pressure in the combustion chamber after the first ignition automatically closes the decompression valve (button pops out).

  • Page 17: Warm-Starting

    Grasp the tubular handle firmly with one hand and press the Power Cut against the ground. Place the tip of your left foot in the rear handle. Pull the starter cable strong and rapidly until you hear the first audible ignition. CAUTION: Do not pull out the starter cable more than approx.

  • Page 18: Adjusting The Carburetor

    Adjusting the carburetor NOTE: The grinding parts are equipped with an electronic ignition to limit the speed. The carburetor also has a fixed jet which cannot be adjusted. At the factory the idling speed has been set to approx. 2,500 rpm, but the running-in process of a new engine may require slight readjustment of the idling speed.

  • Page 19: Maintenance

    Instruction Manual are vital to the safety of the unit, and because all parts are subject to a certain amount of wear and tear, it is important for your own safety that you have the unit checked and maintained regularly by a MAKITA service center. IMPORTANT:...

  • Page 20: Cleaning The Protection Hood

    Cleaning the protection hood Over time, the inside of the protective hood can become caked with material residue (especially from wet cutting), which if allowed to accumulate can hinder the free rotation of the cut- ting disc. For this reason the hood must be cleaned out from time to time.
  • Page 21 • it out in lukewarm water with standard dishwashing liquid Daily or at least every or MAKITA filter cleaner (Order No. 980 008 627). If using MAKITA filter cleaner, proceed as described after the text • 4 operating hours, or section "Cleaning".

  • Page 22: Replacing The Spark Plug

    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 (Order No. 965 60 01) must be replaced in case of damage to the insulator, electrode erosion (burn) or if the electrodes are very dirty or oily.
  • Page 23 Replacing the starter cable Remove four screws (14). Remove starter housing (15). Unscrew two screws (16) and carefuly remove the air guide (17) from the starter housing (15). Proceed in the order (A - B - C - D). Remove all pieces of cable (18). Thread in a new starter cable (dia 4.0 mm, length 1000 mm) as shown (don’t forget the disc (19)) and knot both ends.
  • Page 24 Replacing the return spring Remove the starter housing (see “Replacing the starter cable”). Take the air guide off the starter housing (see “Replacing the starter cable”). Take off circlip (1) (circlip pliers, see “Accessories”). Remove the cable pulley (2). Unscrew screw (3). Evenly lever the return spring (4) out of the catch using a screw- driver or similar tool.

  • Page 25: Cutting Attachment In Central / Side Position

    Cutting attachment in central / side position NOTE: The Power Cut is delivered with the cutting attachment mounted in the middle position (1). For cutting up against ob- stacles, such as curbs or walls, the cutting attachment can be mounted to one side (2). Use this position only when actually necessary, and afterwards return the cutting attachment to the middle position In this position the Power Cut has better balance, is easier to...

  • Page 26: Replacing/Cleaning The Spark Arrester Screen

    Press the cutting attachment (13) onto the drive arm in the side position. Guide the V-belt (14) over the V-belt pulley (15). Put the guard plate (16) on. Screw on nuts (17) and tighten by hand. To tighten the V-belt see ”Tightening the V-belt / Checking V- belt tension”.

  • Page 27: Special Accessories

    It can be quickly and easily mounted on the Power Cut. The MAKITA guide trolley makes it much easier to do straight cuts, while simultaneously enabling almost untiring working. It can be adjusted for the operator´s height, and can be operated with the cutting attachment mounted in the middle or on the side.

  • Page 28: Instructions For Periodic Maintenance

    Guarantee claims can be recognized only if this work is performed regularly and properly. Failure to perform the prescribed maintenance work can lead to accidents! Users of the Power Cut must not perform any maintenance work not described in this Instruction Manual. All such work must be carried out by a MAKITA service centre. Page General Entire Power Cut Clean exterior, check for damage.

  • Page 29: Service, Spare Parts And Guarantee

    Please bear in mind that if parts other than original MAKITA spare parts are used, this will automatically invalidate the MAKITA product guarantee. We will furthermore not accept any liability damages arising from the use of non-MAKITA spare parts.

  • Page 30: Troubleshooting

    Troubleshooting Malfunction System Observation Cause Cutting disc does not start turning Clutch Engine runs Damage to clutch Cutting disc runs in idle Carburetor, Cutting disc runs Incorrect idle speed, clutch blocked clutch Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com- only with difficulty pression system, mechanical malfunction.

  • Page 31: Extract From Spare Parts List

    Extract from the spare parts list DPC7331HD Use only original MAKITA parts. For repairs and DPC7341HD replacement of other parts, see your MAKITA service center. Pos. MAKITA-No. Qty. Denomination Synthetic resin cutting disc 966 144 150 Cutting disc for steel, dia.
  • Page 32 Makita U.S.A., Inc. 1490 Northam Street La Mirada, CA 9068-575...

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