MAKITA DPC8112 (01) PDF Document

Intended Use:

Use the MAKITA DPC8112 power cut saw outdoors only, for trimming and cutting suitable materials, using cutting discs rated for this machine.

Improper Use:

Never use the cutoff saw cutting discs for grinding or sanding (using the side of the cutting disc to remove material), as the disc can break. Never use the MAKITA DPC8112 with saw blades, cutter blades, brushes, carbide-tipped, wood cutting blades, etc.

To avoid head, eye, hand, or foot injuries and to protect your hearing, the following protective equipment must be used during operation of the MAKITA DPC8112:

Clothing: Should be tight-fitting but not a hindrance. Avoid clothing where material grains can accumulate (e.g., trousers with cuffs). Do not wear jewelry.

Protective Helmet (A): Must be worn at all times. Check regularly for damage and replace after 5 years at the latest. Use only approved helmets.

Helmet Visor (B) or Goggles (C): Wear to protect the face and eyes from dust and material grains.

Hearing Protection (D): Always wear suitable personal hearing protection like ear muffs or ear plugs to prevent hearing damage.

Respiratory Protection (E): When dry-cutting dust-producing materials like stone or concrete, always wear approved respiratory protection.

Work Gloves (F): Tough leather gloves are required and must always be worn when working with the power cut saw.

Safety Shoes or Boots (G): Wear safety shoes with steel toes, non-skid soles, and leg protectors.

Work Suit (H): Wear a work suit of tough material with sufficient flame-retardant qualities.

Go to a safe, level place before refueling. Never refuel on scaffolding or similar places.

Switch off the engine before refueling.

Do not smoke or work near open fires.

Let the engine cool down before refueling.

Wear protective gloves. Avoid skin and eye contact with fuel.

Do not spill fuel. If a spill occurs, clean the power cut immediately. If fuel contacts clothes, change them at once.

Ensure no fuel oozes into the soil. Use an appropriate base.

Do not refuel in closed rooms due to explosion hazard from fuel vapors.

Firmly tighten the screw cap of the fuel tank.

Before starting, move at least 3 meters (approx. 10 feet) away from the fueling location.

Use only approved and marked containers for transport and storage of fuel.

Keep fuel away from children.

Before starting work, the MAKITA DPC8112 must be checked for perfect function and operating safety. In particular, make sure that:

The cutting wheel is in good condition (replace immediately if torn, damaged, or bent).

The cutting wheel is properly mounted.

The protective hood is locked in place.

The hand guard is properly mounted.

The V-belt has the proper tension.

The throttle moves easily and the half-throttle lock button functions properly.

The grips are clean and dry.

The combination switch (Start/Stop I/O, choke) functions properly.

Visually inspect the muffler for damage and possible dirt.

Start the MAKITA DPC8112 only after complete assembly and inspection. Never use it when it is not completely assembled.

Kickback occurs when the top of the cutting disc is used for cutting. This can throw the power cut back toward the user with great force.

To prevent kickback:

Never cut with the top section of the cutting disc.

Be especially careful when reinserting the disc into cuts that have already been started.

Lock-in occurs when the cut narrows (e.g., crack, or workpiece under stress), causing the power cut to suddenly jump forward.

To prevent lock-in:

When reinserting the disc into previous cuts, have the power cut running at top speed. Always cut at top speed.

Always support the workpiece so that the cut is under tension, preventing the cut from pressing together and jamming the disc.

When starting a cut, apply the disc to the workpiece with care. Do not just shove it into the material.

Never cut more than one piece at a time.

Transport

Always turn off the MAKITA DPC8112 when transporting it or moving it from place to place on a site.

Never carry or move the unit with the engine on or the disc moving.

Carry the unit only by the tubular (middle) handle with the cutting disc pointing behind you. Avoid touching the exhaust muffler (burn hazard).

When transporting in a vehicle, ensure it is securely positioned to prevent fuel leaks. Always remove the cutting disc and allow the power cut to cool completely before transport.

Storage

Store the MAKITA DPC8112 safely in a dry place. Do not leave it outdoors.

Always dismount the cutting disc before storage.

Keep the power cut away from children.

For long-term storage, empty the fuel tank and run the carburetor dry.

When storing cutting discs, clean and dry them, store them lying flat, and avoid dampness, freezing, direct sunlight, and temperature fluctuations.

Before re-using a resin cutting disc, check the use-by (expiration) date. Do not use if expired.

Always test new or stored cutting discs for defects by test-running the tool at top speed for at least 60 seconds away from people and body parts.

Before starting, always turn off the engine, pull off the spark plug cap, and wear protective gloves.

1. Inspect the disc for damage. See safety instructions.

2. Unscrew screw (9) and remove the spring washer (8).

3. Place the cutting disc (5) on the arbour (7). The arbor hole must be an exact fit. If larger, use an adapter ring.

4. If a rotation direction is marked on the disc, make sure it is installed to turn in the right direction.

5. Place the spring washer (8) on the arbour and insert the screw (9), then tighten by hand.

6. Turn the disc slowly until the stop hole of the V-belt pulley is visible in the cutting arm cover (10).

7. Insert the Allen key (2) as far as it will go to block the shaft.

8. Tighten the screw firmly with the combination wrench (1) to 30 ± 2 Nm. Otherwise, the cutting wheel may slip during cutting.

Exact V-belt tension is essential for maximum cutting performance. If the power cut is new or the V-belt has been replaced, retighten it after the first hour of operation.

1. Loosen the two fastening nuts (11).

2. To increase the belt tension, turn the tightening screw (12) to the right (clockwise) with the combination wrench.

3. The belt tension is correctly adjusted when the nut (13) is centered on the mark (14).

4. After adjusting, make certain to tighten the fastening nuts (11) to 30 ± 2 Nm.

The MAKITA DPC8112 is powered by a high-performance two-stroke engine and runs on a mixture of gasoline and two-stroke engine oil. The engine is designed for unleaded regular gasoline with a minimum octane value of 91 ROZ.

The correct mixture ratio depends on the type of oil used:

100:1: When using MAKITA HP 100 High Performance two-stroke engine oil (100 parts gasoline to 1 part oil).

50:1: When using MAKITA High Performance two-stroke engine oil (50 parts gasoline to 1 part oil).

To prepare the mixture, first mix the entire oil quantity with half of the required fuel, then add the remaining fuel. Shake the finished mixture thoroughly before pouring it into the power cut’s tank.

Caution: Open the tank cap carefully, as pressure might have built up inside. Do not add more engine oil than specified.

The following table shows the required oil amounts for different gasoline quantities:

Preparation:

Observe all safety instructions. Start only after complete assembly and inspection.

Move at least 3m away from where you fueled the unit.

Ensure you have a good footing and place the power cut on the ground so the cutting disc is not touching anything.

Cold-starting Procedure:

1. Move the combination switch (6) up to the choke position.

2. Grasp the handle. This actuates the grip throttle lever lock (8).

3. Push the throttle (9) in all the way and hold it.

4. Press the throttle lock (7) and release the throttle (9). The throttle lock will hold the throttle at the half-throttle position.

5. Depress the decompression valve (5).

6. Grasp the tubular handle firmly and press the power cut against the ground. Place the tip of your left foot in the rear handle.

7. Pull the starter cable strong and rapidly until you hear the first audible ignition. Do not pull out more than approx. 50 cm, and lead it back by hand.

8. Depress the decompression valve (5) again.

9. Put the combination switch (6) in position “I”.

10. Keep pulling the starter cable until the engine catches.

11. As soon as the engine is running, press the throttle (9) to release the half-throttle lock (7), allowing the engine to idle.

Warm-starting Procedure:

Follow the same procedure as “Cold-starting,” but do not put the combination switch (6) in the choke position.

To stop the engine, push the combination switch (10) down to the STOP position.

The factory idling speed is set to approx. 2500 rpm, but a new engine’s running-in process may require slight readjustment.

1. Start the engine and let it run until it is warm (about 3-5 minutes).

2. Use the included screwdriver (1) to adjust the carburetor. It has a lug to help with adjustment.

3. If the cut-off disc is still turning when the engine is idling, unscrew the adjusting screw of the throttle valve (2) until the disc is no longer turning.

4. If the engine stops when idling, tighten the screw a little.

5. Switch off the engine after adjustment is complete.

CAUTION: Turn off the engine before cleaning the air filter. Never clean with compressed air or fuel. Failure to perform maintenance will cause increased engine wear.

Disassembly:

1. Turn the cover lock (11) to the “Unlocked” position and carefully remove the filter cover (12).

2. Remove screws (13) and take off the cover (14).

3. Take the pre-filter (foam, 17) out of the filter cover.

4. Pull the air filter insert (paper cartridge, 18) out of the cover.

5. Remove the inner filter (16) from the intake opening.

Pre-filter Maintenance (foam with air-filter oil for DPC8111 and 8112):

Clean or replace daily when cutting with high dust amounts. Clean or replace weekly for wet cutting or steel cutting.

Cleaning: Rinse off coarse dirt in running water. Knead a capful of MAKITA filter cleaner into the foam until it suds. Rinse thoroughly and let it dry. To ensure full filtration, wet the pre-filter with a capful (about 20 ccm) of MAKITA air-filter oil, knead it to distribute the oil, and squeeze out any excess.

Inner Filter Maintenance (all models):

Wash the dirty inner filter in lukewarm soapy water with regular dishwashing liquid or MAKITA filter cleaner. Let it dry thoroughly.

Air Filter Insert (paper cartridge, all models):

This filter must never be washed. Clean it once a week by spreading it out slightly and carefully tapping it against a clean surface. Replace the air filter insert every 100 operating hours or immediately if there is a drop in power, speed, or smoke in the exhaust.

Before reassembly, check the intake opening to ensure no dirt particles have fallen in.

CAUTION: Do not touch the spark plug or plug cap if the engine is running (high voltage). A hot engine can cause burns, so wear protective gloves.

Replace the spark plug in case of insulator damage, electrode erosion, or if it’s very dirty or oily.

1. Turn the cover lock (6) to the “Unlocked” position and carefully remove the filter cover (7).

2. Flip up the spark-plug cover (8).

3. Pull the plug cap off the spark plug.

4. Use only the combination wrench supplied with the saw to remove the spark plug.

5. Set the electrode gap on the new spark plug to .020″ (0.5 mm).

6. Install the new spark plug and reassemble in reverse order. Use only BOSCH WSR 6F, CHAMPION RCJ-6Y, or NGK BPMR 7A spark plugs.

Use the side position only when necessary for cutting against obstacles like curbs or walls. The central position provides better balance and is less fatiguing.

1. Loosen nuts (5).

2. Loosen the tightening screw (3) (counter-clockwise) until the end of the screw (4) is visible in the gap.

3. Loosen and unscrew the screw (detail X, only for DPC8112).

4. Unscrew the nuts (5) and remove the cover (6).

5. Use the combination tool (8) to lever out the stop pin (9) until the protective hood (11) can be turned.

6. Unscrew the grip (10) and turn the protective hood (11) as shown.

7. Disengage the V-belt (12) and remove the cutting attachment.

8. Press the cutting attachment (13) onto the drive arm in the side position.

9. Guide the V-belt (14) over the V-belt pulley (15).

10. Put the guard plate (16) on and screw on nuts (17) hand tight.

11. Tighten the V-belt as per instructions.

12. Screw in and tighten the screw (detail X, only for DPC8112).

13. Tighten the nuts (17) firmly with the combination wrench.

14. Replace the grip (18) as shown.

IMPORTANT: When you reposition the cutting attachment, the direction of rotation of the cutting wheel changes. If a rotation direction is marked on the cutting disc, make sure the disc turns in the right direction.