Earthquake CS3814B User Manual download pdf (Page 12)

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Operator's Manual

CS3814B, CS4116B Chainsaws

SAFETY FEATURES

This saw is equipped with certain safety features and devices

to protect the user from harm in the event the saw reacts

unexpectedly to external forces:

1. Chain Brake: The saw is equipped with a chain brake

designed to stop the chain instantaneously upon

activation. The chain brake can be activated in one of

two ways:

• The forward hand guard doubles as an activation

lever for the hand brake. It can be activated manually,

or it may be activated by the user’s arm if a kickback

occurs.

• The saw is also equipped with an “Inertial Chain

Break.” The same mechanism as above is activated by

the inertial force created when a counterweight under

the forward hand guard accelerates toward the bar

nose during a kickback.

• Proper cleaning and care of the chain brake system

are required to ensure reliable operation in the eld.

You should also check your chain brake for proper

operation regularly. To check your chain brake:

• Manually activate the chain brake by pushing the

forward hand guard toward the bar nose (SEE

FIGURE 3-A). There will be an audible click when the

chain brake engages. If there is no audible click, the

chain brake may already be engaged. Pull back on

the forward hand guard to deactivate the brake (SEE

FIGURE 3-B). An audible click should be heard when

the brake disengages. If there is still no audible click,

the brake is not functioning properly. Remove the

clutch cover, clean and reassemble, and re-test. If no

audible click is heard, contact customer service for

further assistance.

• With the saw’s engine shut o and the chain brake

disengaged, rmly grasp both handles and hold the

saw over a log or low stump. Swing the bar nose

sharply down until it makes contact. This should

create enough inertial force to automatically activate

the chain brake. When the chain brake engages, an

audible click should be heard. If no audible click is

heard, the brake is not functioning properly. Remove

the clutch cover, clean and reassemble, and re-test. If

no audible click is heard, contact customer service for

further assistance.

NOTE: Chain break must be in the OFF position to run the

chainsaw.

BREAK ON

BREAK OFF

A - chain break ON

B - chain break OFF

FIGURE 3

2. Throttle Interlock: This saw is equipped with a throttle

interlock designed to prevent accidental engagement of

the throttle control. The throttle interlock is disengaged

by depressing the red tab on top of the rear handle. This

is usually accomplished when the user grasps the rear

handle to operate the saw.

3. Chain Catcher: Each saw is equipped with a chain

catcher beneath the clutch cover. If the chain is ever

thrown from the guide bar, or if the chain breaks, the

chain catcher is designed to capture the chain and

prevent it from whipping back toward the operator.

NOTE: Inspect the chain catcher before each use. Replace

if missing or badly damaged.

4. Kickback Reduction Guide Bar and Saw Chain: This

saw has been equipped with a Double Guard® 91 guide

bar and 91P S-Series Low Kickback saw chain by Oregon®.

The features of this bar and chain combination are design

to reduce the risk of kickback. To maintain adequate

kickback prevention, only use these components

when replacing guide bar or saw chain. (Refer to the

Maintenance section of this manual for full details.)

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Earthquake CS3814B User Manual Page 12

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