Chain Brake Testing | McCulloch PRO MAC 72 specification

UKENGLISH

CHAIN: Check tension regularly. A new chain will require more frequent adjustment. Loosen retention nuts. adjust chain (see assembly instructions). Tighten retention nuts.

1 BAR

-Clean the bar groove (K) and check the lubrication holes (L) in the bar to ensure that they are not clogged.

-Grease sprocket periodically. Rotate sprocket and repeat.

-Rotate bar periodically to maximise bar life.

2 AIR FILTER

-A dust clogged air filter may cause carburetor problems. This may prevent the engine from reaching its maximum r.p.m. and cause high fuel consumption.

-Remove cover.

-Wash filter in petrol (do not use fuel which is mixed with oil).

-The filter can also be cleaned with compressed air.

-Replace filter if damaged or if it does not seal tightly in the air box.

3 SPARK PLUG

Remove and clean the spark plug every 30 hours. Check the electrode gap (0,5/0,6 mm).

-Replace spark plug about every 100 working hours or whenever it is extremely encrusted.

-Heavily encrusted electrodes can result from an incorrect carburetor setting or from wrong fuel mixture (too much oil in the fuel mix) or a poor quality of oil in the fuel mix. Check and correct.

4OIL FILTER

The oil filter is end of the oil suction hose inside the oil tank .To clean and replace the filter pull it out through the oil tank filter opening. Use a piece of bent wire or long forceps. To remove deposits from the oil tank half fill it with kerosene or petrol and shake thoroughly. Drain off and fill the tank with fresh saw chain oil. Never use waste oil.

5FUEL FILTER

To change fuel filter remove the tank cap and pull out the filter with a piece of bent wire or long forceps. Replace the filter as shown in the illustration and reposition it.

It is recommended to replace the fuel filter at least once a year.

CHAIN BRAKE

WARNING: Contact your service dealer if anything appears wrong with your chain brake. Do not disassemble or manipulate the mechanism of the chain brake.

-Clean the brake mechanism periodically (without disassembling it) and control the wear of the band visually.

•PERIODICALLY: It is important to clean the saw thoroughly particularly around cylinder fins to avoid overheating of the engine.

•LONG STORAGE: Empty fuel and run engine until dry.

ICHAIN BRAKE

TESTING

Your chainsaw is fitted with an automatic safety chainbrake designed to stop the chain in milliseconds in case of kickback. Always hold the saw firmly in both hands.

The chain brake does not provide total protection if the machine is used without taking the necessary precautions or carrying out proper maintenance. The chain brake can also be engaged manually by pushing the chain brake lever forwards.The manual use of the chain brake is recommended only at idle.

Always test the chain brake before using your saw. Do this at idle by engaging the brake (see below).

Always release the brake before starting. Kickback may occur if the end of the bar (see illustrated angle) touches any solid object or if the top of the bar becomes pinched in the wood. Never attempt to start a cut with the end of the bar.

Kickback is a violent upward or rearward movement of the bar and may cause you to lose control of the machine.

Always keep a firm grip on the saw with both hands because,in case of kickback, it is the contact of the left hand with the brake lever which will help to engage the brake.

CAUTION: Initial contact with the wood may occasionally cause the chain to buck, and if the chain teeth are not correctly sharpened, the chain may skate on the wood.

TESTING THE CHAIN BRAKE :

1The chain brake is disengaged when brake lever is pulled back and locked (chain can move).

2The chain brake is engaged when brake lever is in forward position (chain is stopped).

PRO MAC 72 specifications

The McCulloch PRO MAC 72 is a classic chainsaw, highly regarded by tree care professionals and woodcutters alike. Introduced in the late 1980s, it quickly gained a reputation for its robust build and reliable performance, making it a prized possession among those who value quality tools.

At the heart of the PRO MAC 72 is a powerful 72cc two-stroke engine, which delivers an impressive output that ensures strong cutting performance. This robust engine design allows for efficient power delivery, enabling the chainsaw to tackle even the most challenging tasks with relative ease. With a maximum speed of around 13,000 RPM, it can handle hardwoods and dense materials that would often be problematic for less powerful saws.

One of the standout features of the McCulloch PRO MAC 72 is its lightweight construction, considering its power. Weighing in at around 11.5 pounds, it strikes a balance between portability and stability, allowing users to operate it for extended periods without excessive fatigue. Its ergonomic handle design also enhances comfort and control, facilitating high maneuverability as you navigate through various cutting scenarios.

The chainsaw is equipped with an automatic oiling system that continuously lubricates the chain, ensuring optimal performance and reducing wear during operation. This feature not only prolongs the lifespan of the chain but also minimizes maintenance requirements, allowing users to focus on their cutting tasks without frequent interruptions.

Safety is a primary concern with any chainsaw, and the PRO MAC 72 incorporates several safety features to protect the user. It is outfitted with a chain brake system that engages automatically in the event of kickback, providing a critical layer of safety while in use. Additionally, the throttle lock ensures that inadvertent acceleration is minimized, keeping the operator secure while handling the saw.

Durability is another hallmark characteristic of the McCulloch PRO MAC 72. Built with high-quality materials, it withstands the rigors of daily use in demanding environments. Whether used in forestry, landscaping, or construction, the chainsaw's rugged design ensures that it remains functional and reliable.

In summary, the McCulloch PRO MAC 72 chainsaw is a blend of power, durability, and user-centric design. With its efficient engine, lightweight structure, automatic lubrication system, and essential safety features, it continues to be a favored choice among professionals needing a trusted tool for demanding cutting tasks. Those who invest in a PRO MAC 72 can expect not only impressive performance but also reliability that stands the test of time.