Mac 140 Chainsaw Manual

Suitable Replacement McCulloch MAC 140 Chain Parts

Chain saw chain design has come a long way in the last 60 years. Currently, chains are being designed on computers. The manufacturing process has also advanced to new levels to permit worldwide delivery of the best combinations of chain available. To get maximum power and performance out of your chain saw and optimum power when cutting wood, make sure your saw has a sharpe chain or new suitable replacement McCulloch MAC 140 chain parts.

McCulloch MAC 140 Chain Types & Configurations

Chain saw chain comes in many different configurations from professional chisel chain [square tooth] to semi-chisel [round tooth] chain to safety chain saw chain for the occasional user. McCulloch MAC 140 Chain saw chain comes in many combinations to include full chisel chain, semi chisel chain, full skip chain, ripping chain, carving chain and harvester chain.

Every chain must be driven to perform work. On the bottom of every McCulloch MAC 140 chain there are drive links that are v-shaped. The drive links ride into the bar groove to guide the chain in the cut.

The cutter has several different parts. First, there is a top plate which is the top of the cutter and is the leading edge of the cutter tooth. There are both left and right cutters that alternate from left to right and left again. Next, the depth gauge controls how deep the cutter tooth cuts. There is also a gullet which funnels the wood chips away underneath the cutter and ejects them when the chain reaches the sprocket. The toe of the McCulloch MAC 140 chain cutter rides on the bar groove and is on the front bottom of the cutter. Another toe on the bottom rear of the cutter can become worn as the tooth rocks when cutting the wood fibers. Finally, there are rivet holes where the bearing rivet rides.

The last part of the McCulloch MAC 140 chain is the tie strap that is opposite the cutter tooth. This strap helps to connect the chain together.

McCulloch MAC 140 Chain Maintenance

The chain saw chain requires periodic maintenance of the chain cutters. You can either file the McCulloch MAC 140 chain with a chain saw file or use an electric sharpener (12 volt or 110 AC chain grinder) to sharpen the cutter for top performance.

The top five things to remember to get top performance from your chain are:

1- Your chain must be sharp

2- Your chain‹??s depth gauge must be properly set per manufacturer's specifications

3- Your chain must be properly tensioned

4- Your chain must be properly lubricated

5- Your bar must be in good shape

General things to know about different types of McCulloch MAC 140 chain and for cutting conditions:

Skip tooth chain is generally used for longer bars sized 24‹?? and up. Skip tooth chain is usually for the professional and has more kick back tendencies.

Ripping chain is designed to cut with the grain of the wood and not against it, the chain is sharpened either 10 or 15 degrees and is intended for saw mills.

Semi-chisel chain [round tooth] is one the most overlooked chains on the market. The round cutter is more forgiving in dirty wood conditions when compared to the chisel cutter chain. This type of McCulloch MAC 140 chain cuts a little slower but stays sharper longer than chisel chain.

Chisel chain is by far the fastest cutting chain available for chain saws, with its square teeth, it cuts faster than the semi chisel round tooth chain. However, McCulloch MAC 140 chisel chain doesn‹??t perform well in dirty conditions. Once the points get dull, chain cutting performance decreases significantly.

To determine your replacement McCulloch MAC 140 chain, count the drive links on the chain. The drive links are v-shaped and go into the bar groove. You may also find a number on the drive link along with the manufacture of the chain. Armed with this information, you can check the chain reference chart or go to the saw manufacturer to find and the bar and chain information for your model number.

For more information on measuring chain saw chain, determining pitch of chain, and using the chain reference chart, feel free to browse the chain saw chain information section.

Suitable Replacement McCulloch MAC 140 Chain Parts

Chain saw chain design has come a long way in the last 60 years. Currently, chains are being designed on computers. The manufacturing process has also advanced to new levels to permit worldwide delivery of the best combinations of chain available. To get maximum power and performance out of your chain saw and optimum power when cutting wood, make sure your saw has a sharpe chain or new suitable replacement McCulloch MAC 140 chain parts.

McCulloch MAC 140 Chain Types & Configurations

Chain saw chain comes in many different configurations from professional chisel chain [square tooth] to semi-chisel [round tooth] chain to safety chain saw chain for the occasional user. McCulloch MAC 140 Chain saw chain comes in many combinations to include full chisel chain, semi chisel chain, full skip chain, ripping chain, carving chain and harvester chain.

Every chain must be driven to perform work. On the bottom of every McCulloch MAC 140 chain there are drive links that are v-shaped. The drive links ride into the bar groove to guide the chain in the cut.

The cutter has several different parts. First, there is a top plate which is the top of the cutter and is the leading edge of the cutter tooth. There are both left and right cutters that alternate from left to right and left again. Next, the depth gauge controls how deep the cutter tooth cuts. There is also a gullet which funnels the wood chips away underneath the cutter and ejects them when the chain reaches the sprocket. The toe of the McCulloch MAC 140 chain cutter rides on the bar groove and is on the front bottom of the cutter. Another toe on the bottom rear of the cutter can become worn as the tooth rocks when cutting the wood fibers. Finally, there are rivet holes where the bearing rivet rides.

The last part of the McCulloch MAC 140 chain is the tie strap that is opposite the cutter tooth. This strap helps to connect the chain together.

McCulloch MAC 140 Chain Maintenance

The chain saw chain requires periodic maintenance of the chain cutters. You can either file the McCulloch MAC 140 chain with a chain saw file or use an electric sharpener (12 volt or 110 AC chain grinder) to sharpen the cutter for top performance.

The top five things to remember to get top performance from your chain are:

1- Your chain must be sharp

2- Your chain‹??s depth gauge must be properly set per manufacturer's specifications

3- Your chain must be properly tensioned

4- Your chain must be properly lubricated

5- Your bar must be in good shape

General things to know about different types of McCulloch MAC 140 chain and for cutting conditions:

Skip tooth chain is generally used for longer bars sized 24‹?? and up. Skip tooth chain is usually for the professional and has more kick back tendencies.

Ripping chain is designed to cut with the grain of the wood and not against it, the chain is sharpened either 10 or 15 degrees and is intended for saw mills.

Semi-chisel chain [round tooth] is one the most overlooked chains on the market. The round cutter is more forgiving in dirty wood conditions when compared to the chisel cutter chain. This type of McCulloch MAC 140 chain cuts a little slower but stays sharper longer than chisel chain.

Chisel chain is by far the fastest cutting chain available for chain saws, with its square teeth, it cuts faster than the semi chisel round tooth chain. However, McCulloch MAC 140 chisel chain doesn‹??t perform well in dirty conditions. Once the points get dull, chain cutting performance decreases significantly.

To determine your replacement McCulloch MAC 140 chain, count the drive links on the chain. The drive links are v-shaped and go into the bar groove. You may also find a number on the drive link along with the manufacture of the chain. Armed with this information, you can check the chain reference chart or go to the saw manufacturer to find and the bar and chain information for your model number.

For more information on measuring chain saw chain, determining pitch of chain, and using the chain reference chart, feel free to browse the chain saw chain information section.

Suitable Replacement McCulloch MAC 140 Carburetor Kit

Performance Parts Supply carb kits meet or exceed OEM specifications for McCulloch MAC 140 carburetor kit parts and they cost less than OEM kits while maintaining excellent quality and durability. You can quickly buy our suitable replacement McCulloch MAC 140 Chainsaw Carburetor Kit for sale in our online store and get it shipped fast.

McCulloch MAC 140 Carburetor Kit - General Carb Kit Info

The carburetor has two different sides. First, the fuel pump side of the carburetor pumps fuel from the fuel tank through the fuel line to the metering side of the carburetor. Second, the metering side of the carburetor supplies fuel to the jets in the carburetor so the saw idles properly. Additionally, this side allows the saw to accelerate to full throttle instantly when the throttle is activated [pulled]. Finally, this side maintains fuel to the chain saw motor at full throttle regardless of the position of the saw.

The McCulloch MAC 140 carburetor has diaphragms and gaskets to help it pump and meter the fuel by crankcase impulse. Every time the piston goes up and down, it creates vacuum and pressure in the crankcase. The carburetor uses this pulse via a pulse line connected to the crankcase or through the carburetor intake to get the pulse needed to properly make the carburetor function.

On the metering lever side of the McCulloch MAC 140 carburetor, there is a diaphragm and gasket with a cover plate screwed to the carburetor. The metering diaphragm controls the amount of fuel allowed to enter the metering lever side of the carburetor. The diaphragm is either connected or just touching the fulcrum [meter lever] and when fuel exits the metering side of the carburetor through the jets in the carburetor, atmosphere pressure [14.7 psi] pushes the diaphragm in letting more fuel in. As the fuel rises to fill the metering lever side of the McCulloch MAC 140 carburetor, the inlet needle valve closes the fuel off from the fuel pump side of the carburetor. The needle valve goes into the body of the carburetor and is fastened to the metering lever fulcrum which has a spring under the opposite side of the needle valve to keep pressure on the needle valve when closed.

On the metering lever side of the McCulloch MAC 140 chainsaw carburetor there are two sides, a low side and a high side. The low side controls idle and acceleration when the saw starts to rev up. The high side controls the amount of fuel the saw will receive at full RPM. Some carburetors will have 2 adjusting screws, one for the low side and one for the high side. There is also an idle screw which makes contact with the throttle shaft to control idle speed along with the low side of the carburetor. Note that some carburetors have just one adjusting screw and the other side is prefixed and non-adjustable. Some may also have no adjusting screws [except the idle screw] to preset or pre-jet the carburetor.