Chain Saw Safety and Operation Check

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Questions and Answers

What should you do while the saw is warming up?

Let the saw idle on a hard surface without monitoring it

Shut off the saw immediately

Hold the saw in one hand and rev it up to full RPM

Properly hold the saw in both hands during the warm up period (correct)

How do you check the chain and bar oiling?

By smelling the chain and bar

By revving the saw's RPM up and pointing the tip of the bar to a light-colored surface (correct)

By checking the oil level in the tank

By feeling the chain and bar for oil

What should you do to engage the chain brake?

Pull the hand-guard towards the nose of the bar

Flip the master control lever up

Push the black hand-guard on top of the saw towards the nose of the bar (correct)

Shut off the saw

What is the correct way to adjust the chain tension?

Turn the tension-adjusting screw clockwise to increase the chain tension Signup and view all the answers

Why should you check the chain tension regularly?

Because the chain will stretch and droop as it heats up, limbers up, and/or wears in operation Signup and view all the answers

When should the chain brake be engaged?

Before moving a running saw and when the saw is stored Signup and view all the answers

What is the correct direction to turn the adjustment screw while tightening the chain?

Clockwise Signup and view all the answers

What should you check after adjusting the chain tension?

The chain tension after the bar has cooled Signup and view all the answers

What is the likely cause of a saw that won't start and has fuel/liquid coming out of the muffler?

Flooded combustion chamber Signup and view all the answers

How should the carbide teeth on top of the bar be positioned when reinstalling the chain?

Pointing towards the bar tip Signup and view all the answers

What is the purpose of lifting up on the bar tip while tightening the chain?

To ensure proper chain tension Signup and view all the answers

In what position should the saw be in when attempting to start a flooded saw?

Run position Signup and view all the answers

What should you do if the saw won't start after 30-40 pulls?

Initiate a Work Order Ticket for saw repair Signup and view all the answers

What should you do to the throttle during the starting process?

Keep it wide open Signup and view all the answers

What is the purpose of running the saw between idle and wide open for a minute or two?

To clear out the fuel/oil mixture from the exhaust Signup and view all the answers

What should you check on the spark plug?

The electrode gap Signup and view all the answers

What is the purpose of the Sawyer Kit?

To provide protective equipment to personnel Signup and view all the answers

What should you do to the muffler during the starting process?

Hold the throttle wide open to let it dry out and burn off fuel Signup and view all the answers

What percentage of a blade remaining warrants a replacement?

80% Signup and view all the answers

What type of cutting wheel is suitable for cutting railway tracks?

None of the above Signup and view all the answers

What does the letter 'A' indicate on a diamond cutting wheel?

Asphalt Signup and view all the answers

How should the tensioning nut be positioned before tightening the V-belt?

Towards the 0 Signup and view all the answers

When should the carbide tips on a blade be inspected?

Every shift Signup and view all the answers

What is the purpose of removing the screws from the filter cover?

To clean the filter Signup and view all the answers

What is the correct grip when operating the saw?

One hand on the front handle, one hand on the throttle assembly handle Signup and view all the answers

What should you do when starting a cut?

Start the cut gently and move the blade slowly Signup and view all the answers

Why should you always cut with the blade fully vertical?

To use the entire blade's cutting edge Signup and view all the answers

What is the purpose of the daily visual inspection?

To ensure the saw is in good condition and ready for use Signup and view all the answers

How should you hold the saw when starting it?

With your non-dominant hand on the handle and your dominant hand on the ground Signup and view all the answers

What should you do after the engine turns over?

Squeeze the throttle trigger fully and let it run for 30 seconds Signup and view all the answers

Study Notes

Pre-Operation Checklist

The operator should let the saw idle on a pad or soft ground while monitoring it, or properly hold the saw in both hands during the warm-up period.
The saw should be properly held and slowly revved up to full RPM two to three times.
The proper operation of the chain brake should be checked.
The chain and bar should be checked for proper oiling by revving the saw's RPM up and pointing the tip of the bar approximately 4 to 6” from a light-colored surface.

Chain Brake

The chain brake should be engaged by pushing the black hand-guard on top of the saw towards the nose of the bar.
The hand-guard should be pulled towards the hand-grip to release the chain brake.
The chain brake should always be engaged when the saw is stored.

Adjusting Chain Tension

The chain tension should be checked regularly.
The tension-adjusting screw should be turned clockwise to increase the chain tension.
The chain tension should be adjusted to be as tight as possible without causing binding.
The chain should be checked and adjusted regularly, especially after the chain has stretched or worn in operation.

Replacing a Chain

The bar retaining nuts should be loosened with an appropriate tool, and then the bar adjusting screw should be backed off enough to remove the chain from the bar.
The chain should be removed, and the carbide teeth on top of the bar should point towards the bar tip.
The bar adjusting pin should be checked to ensure it is engaging the bar properly before installing the side cover.
The side cover and nuts should be installed and hand-tightened.
The adjusting screw should be turned clockwise to take up slack in the chain, while lifting up on the bar tip with the other hand.

Flooded Saw Procedure

If the saw won't start after attempting the normal start procedures and/or has obvious fuel/liquid coming out of the muffler, it is most likely flooded.
To start a flooded saw, the saw should be set to the "run" position, and two people should work together to pull the starter rope and hold the saw throttle in the "full on/wide open" position.
The starter rope should be pulled repeatedly until the saw fires, and then the throttle should be held open until the saw runs well.

Minor Maintenance

The carburetor box cover should be removed, and the air filter should be checked.
The spark plug boot should be checked for damage, fraying, or dry rot.
The spark plug should be checked and adjusted if necessary.

Sawyer Kit

The Sawyer Kit should be maintained to ensure proper protective equipment is available to personnel operating chainsaws.
The Sawyer Kit should include spare chains and tools.
Always use the correct blade for the material being cut.
Always operate the saw with one hand firmly placed around the front handle, and the other hand firmly holding the throttle assembly handle.

Cut-off Saw Anatomy

The throttle safety and throttle trigger should be depressed simultaneously.
The slide control should be moved to START.
The choke should be set according to engine temperature.
The primer bulb should be pressed 7-10 times.
The starter should be pulled until it engages, and then given a brisk strong pull.

Daily Visual Inspection

Daily visual checks should be performed at the start of each working shift to ensure cut-off saws are in good condition and ready for use.
Fuel levels should be checked, and the saw should be fueled to 3/4.
Cutting wheels should be inspected for wear, and replaced if necessary.

Cutting Wheels

Composite Abrasive Wheels are suitable for cutting asphalt, concrete, stone, ductile cast pipes, and steel.
Diamond Abrasive Wheels are suitable for cutting asphalt, concrete, stone, bricks, pipes, iron, and steel up to 10mm thick.
Short names appear on the sides of the wheel, indicating the use of the wheel and the performance class of the diamond cutting wheel.

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Description

Learn how to properly start and operate a chain saw, including warming up the saw, checking the chain brake, and ensuring proper lubrication of the chain and bar.