Manual McCulloch 1650-16 (page 11 of 15) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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ENGLISH - 8

Check that the chain is sharpened correctly (See

below), in good working condition and that the

tension is correct. If the chain is irregularly worn, or if

the cutting teeth are only 3 mm high, the chain must

be replaced(fig.3).

Clean the air vents regularly to prevent motor

overheating.

Check that the switch and switch block function

correctly (to be performed with the chain brake

released): press the switch and the switch block and

control that they return to idle position as soon as

they are released; control that it is impossible to

press the switch without activating the switch block.

Check that the chain catcher and the right hand

guard are in correct condition without any visible

faults such as damaged material.

Every 2-3 hours of use

Control the bar condition, if necessary clean the

lubrication holes(fig.4) and the guide grooves(fig.5)

carefully; If the groove is worn or shows signs of deep

notching, it must be replaced. Turn the bar to ensure

even wear(fig.6). Clean the pinion regularly and check

that it has not been subject to excess wear(fig.7).

Lubricate the nose sprocket with bearing grease

through the hole shown in the illustration (fig.8).

Chain sharpening (When necessary)

If the chain does not cut correctly, or requires hard

bar pressure against the wood, and if the sawdust is

very fine, this is a sign that it is not sharpened

correctly. If the cutting action produces no sawdust,

this means the cutting edge has been worn

completely and the chain is pulverising the wood

during cutting. A well-sharpened chain crosses

through the wood without effort or pressure and

produces large long wood shavings.

The cutting side of the chain is composed of the cutting

link (fig.9) with a cutting tooth(fig.10) and a cutting limit

gauge(fig.11). The difference between these determines

the cutting depth; a file guide and a 4mm diameter round

file are needed to obtain good sharpening results; Follow

the instructions below: Once the chain has been

mounted and the tension is correctly adjusted, and the

chain brake is activated, position the file guide

perpendicular to the bar as shown in the

illustration(fig.12), filing the cutting teeth at the angle

shown(fig.13), always working from the interior towards

the exterior, lessening the pressure during the return

stage (it is very important to follow the instructions

perfectly: excessive or insufficient sharpening angles, or

an incorrect file diameter will increase the risk of

kickback.) To obtain higher precision on side angles, it is

advisable to position the file so that it exceeds the upper

cutter by about 0.5 mm. File all the teeth on one side first,

then turn the machine over and repeat the operation.

Make sure that after sharpening operations, all teeth are

the same length and that the height of the depth gauge is

0.6 mm lower than the upper cutter: check the height

using a proper template and file (with a flat file) all

protruding parts, rounding off the front part of the depth

gauge(fig.14), paying attention to not file the kickback

protection tooth(fig.15)

Every 30 hours use.

Take the machine to the Authorised Service Centre

for general revision and control check on brake

components.

PERIODS OF PROLONGED DISUSE

Always empty the fuel tank with the same precautions

used in filling it.

H. CUTTING TECHNIQUES

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

When using the machine, prevent: (fig.1)

- cutting in conditions where the trunk could split

during cutting (wood under pressure, dry dead trees,

etc): sudden splitting can be very dangerous.

- the bar or the chain from becoming blocked in the

cutting notch: if this should occur, disconnect the

machine from the main electricity supply and try to

raise the trunk using an appropriate tool as a lever; do

not attempt to free the machine by shaking or pulling

as this could cause damage or injury.

- situations that can lead to kickback reactions.

During machine use: (fig.1)

- When cutting on sloping ground, always work uphill

of the trunk to avoid being hit if the trunk should roll

downhill.

- Release the switch after each cutting action:

prolonged dry running of the motor will provoke

serious damage.

- When felling trees, always finish the job: a partially

cut tree could break and fall.

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McCulloch 1650-16 Manual

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