7 - MAINTENANCE INSTRUCTIONS

7-2. AIR FILTER

CAUTION

Never operate saw without the air filter. Dust and dirt will be drawn into engine and damage it. Keep the air filter clean!

TO CLEAN AIR FILTER:

1.Remove the top cover (A) by loosening the cover retaining screw. Cover will lift off.(Figure 7-2A)

2.Completely remove the air filter box (B) from the unit. (Figure 7-2B)

3.Clean air filter box by using air cleaner or brush.

NOTE: Never clean air filter with liquid material or it may cause air filter damaged.

4.Install air filter box. Install engine / air filter cover. Make sure cover fits properly. Tighten the cover retaining screw securely.

WARNING

Never perform maintenance when the engine is hot, to avoid any chance of burning hands or fingers.

A

7-2A

B

7-2B

7-3.FUEL FILTER

CAUTION

Never operate your saw without a fuel filter. The fuel filter should be replaced after each 20 hours of use. Drain fuel tank completely before changing filter.

1.Completely remove the fuel cap from the gas tank.

2.Bend a piece of soft wire to form a hook at the end.

3.Reach into fuel tank opening and hook fuel line. Carefully pull the fuel line toward the opening until you can reach it with your fingers.

NOTE: Do not pull hose completely out of tank.

4.Lift filter (A) out of tank (Figure 7-3A).

5.Pull filter off with a twisting motion. Discard filter.

6.Install new filter. Insert end of filter into tank opening. Make sure filter sits in bottom corner of tank. Use a long handle screwdriver to aid in filter placement if necessary.

7.Fill tank with fresh fuel / oil mixture. See Section 4, Fuel and Lubrication. Install fuel cap.

A

7-3A

7-4. SPARK ARRESTER SCREEN (Figure 7-

4A)

NOTE: A clogged spark arrester screen will dramatically reduce engine performance.

1.Remove the 2 nuts (A) and pull muffler out. (Figure7- 4A).

2.Remove the 1 screw (B) that holds the spark arrester cover (C) . (Figure 7-4B)

3.Discard the used spark arrester screen (D) and replace it with a new one.

4.Reasemble the muffler components and install the muffler to the cylinder. Tighten securely.

A

B

C D

A

B

7-4B

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Yard Machines MTD1840AVCC, MTD1640NAVCC manual Fuel Filter, To Clean AIR Filter
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MTD1640NAVCC, MTD1840AVCC specifications

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