McCulloch MAC 20X Instruction Manual download pdf (Page 7)

ENGLISH - 4

C. Safety devices

Your saw is equipped with the following security devices:

C1. CHAIN BRAKE WITH PROTECTION

ATTENTION! Your saw is equipped with a

safety chain brake designed to block the chain,

in case of KICKBACK, in a few milliseconds.

Despite the presence of this useful safety devi-

ce, the following of the security prescriptions

described in this manual is fundamental.

To prevent and reduce the occurrence of a

KICKBACK, always firmly grip the saw with

both hands.

What is a KICKBACK?

1. The KICKBACK is a violent movement that causes the bar

to suddenly jump up towards the operator when it meets

an object with the upper part of the tip. Such a movement

could cause you to lose control of the machine.

2. A KICKBACK always occurs along the blade’s cutting

edge. Usually the KICKBACK takes place with a sudden

movement upwards, but they can happen in other

situations depending on the position of the saw during

cutting.

3. The KICKBACK occurs when the “risk” area of the bar

meets an object.

ATTENTION! Work carefully and be sure that

the “risk of KICKBACK” area never comes in

contact with any objects..

Verify that the brake chain is working correctly and check

the following on a daily basis:

4. That the chain brake (A) is disconnected when the brake

lever (B) is pulled back and blocked (the chain moves).

5. The chain brake (A) is inserted when the brake lever (B) is

pushed forward (the chain is blocked). The movement

activates a spring device that acts on the brake ribbon (C)

pushing it to block the drive system of the chain (D).

ATTENTION! If excessive strength is necessary

to insert or disconnect the brake or neither of

the positions of the lever moves DO NOT USE

THIS MACHINE ANY REASON! Take it immedia-

tely to an authorized assistance center.

Always conduct efficiency checks on the brake before using

the machine (see procedure described in the maintenance

chapter)

The brake chain reduces the risk of accidents, but operator

good sense can avoid them as well.

The protection doesn’t serve only to activate the brake chain:

it also reduces to a minimum the risk of a hand coming into

contact with the chain if you lose hold of the handle.

The KICKBACK can be produced if the end part of the bar

makes solid contact with the wood or other object. Therefore,

you avoid beginning the cut with the part of chain at the

above-mentioned angle.

ATTENTION! The chain brake doesn’t provide

total protection if the machine is operated

without necessary precautions and maintenan-

ce.

ATTENTION! Do not dismantle or tamper with

the chain brake mechanism. In the event of the

machine performing poorly or replacement of

some particular part, please rely exclusively

upon an authorized assistance centre.

The chain brake automatically intervenes due to inertia, in the

case of a violent KICKBACK.

In the event of less violent movements the chain brake is

applied by the left hand. It can also be inserted manually by

pushing the brake lever forward.

If the chain brake is intervened, before restarting it must be

reloaded by bringing the antiKICKBACK protection back

towards the front handle.

ATTENTION! ALWAYS disengage the brake

before every setting in motion of the machine in

order to avoid it breaking.

Use the brake chain as a wait brake during every

moving.

C2. THROTTLE TRIGGER LOCKOUT

The throttle trigger lockout device prevents involuntary

acceleration. When the accelerator block (A) is pushed on the

handle (while gripping the saw) this frees the accelerator (B).

Releasing the handle, the accelerator and the accelerator

block are blocked in the rest position. This mechanism is

activated by two independent return springs. In this position

the engine turns at a minimum.

ATTENTION! Never use the saw with the thrott-

le trigger lockout device pressed with adhesive

tape, string or any other means.

C3. STOP CHAIN CATCHER

This machine is supplied with a stop chain catcher located

under the pinion. The mechanism is designed to stop the

movement behind the chain in the event of breaking or dis-

charge from the bar. These occurrences are avoidable by set-

ting the chain correctly (see chapter “D. Assembling Bar and

WARNING! Never use the saw if the safety devices are defective or damaged.

Follow the instructions for checks, maintenance and service.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Comments to this Manuals

No comments

McCulloch MAC 20X Instruction Manual Page 7

Comments to this Manuals

Related products and manuals for Power chainsaws McCulloch MAC 20X