McCulloch PROMAC 72 28 SP Manuel d'utilisateur télécharger pdf (Page 13)

The chain brake should snap into both

positions.If strong resistance is felt or lever

does not move into either position, DO NOT

USE YOUR SAW.

Take it immediately to an authorized servicing

dealer.

3 CHAIN CATCHER

This unit is fitted with a chain catcher below the

drive spocket. This is intended to stop the

rearward movement of th chain in case of

breakage or if it should come out of the bar, It

should never be removed.

CHAIN SHARPENING

1 The cutter teeth should be sharpened with a

round 7/32" file.

The job can be made easier by also using a file

holder.

The chain can remain fitted on the bar during

sharpening.

Before commencing, the chain should be

tensioned correctly and the chain brake should

be activated to prevent the chain from moving.

2 To obtain a correct sharpening the file must be

carefully held to maintain 3 basic angles:

– A Top angle 30 ° - 35 °

– B External,side angle 85 ° - 90 °

– C Internal, side angle 60 °.

File in one direction only, from the “inside” of

the cutter tooth towards the “outside”.

Do not allow the file to touch the chain as you

bring it back to re-position it. Each cutter tooth

should be filed with the same number of strokes.

3 The file should be held horizontally to the cutter

tooth being sharpened.

4 Best results to obtain a precise sideways

angle can be obtained by holding the file so

that it rises 0,5 mm above the top face of the

cutter tooth.

5 DEPTH GAUGE

Correct depth gauge height is vital to ensure

maximum chain life and cutting efficiency.

The height of the depth gauge should be

lowered as the cutter tooth is filed back; this

height should be checked every 4 or 5

sharpenings.

The best way to do this is to use a flat file and

a depth gauge tool.

The correct setting is 0.65 mm below the top

edge of the cutter tooth.

The cutter tooth depth gauge should then be

rounded (D).

Engine still gives trouble: contact your dealer.

FAULT FINDING TABLE

Engine runs badly

or looses power

when cutting

Engine will not start

The machineruns

butdoes not cut

well

Check STOP switch is in the position I

Control fuel level min. 25% tank capacity

Check air filter is clean

Remove spark plug ,dry it, clean it and

adjust it, and replace it, if necessary

Control and adjust the carburetor screws if

necessary

Change fuel filter. Contact your dealer

Carefully follow the cutting accessory

assembly instructions

Check metal cutting accessory is sharp

Otherwise, contact your dealer

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McCulloch PROMAC 72 28 SP Manuel d'utilisateur Page 13

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