Chain Sharpening; Fault Finding Table - McCulloch chain saw Operator's Manual

2 The chain brake (A) is engaged when brake lever is in the
position (chain cannot rotate).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
the chain in case of breakage or if it should come out of the
bar. It should never be removed.

CHAIN SHARPENING

1 Chain cutter teeth can be sharpened with a round file,
as follows:
CHAIN
MP 370 GLX
PM 320 GX
The exact chain type is marked on the bottom half of the
drive link which runs inside the bar groove.
Filing 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 cor-
rectly and the chain brake should be activated to prevent
the chain from moving.

FAULT FINDING TABLE

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 chain
assembly instructions.
Check chain is sharp.
Otherwise, contact your dealer.
Engine still gives trouble: contact your dealer.
L
FILE
5/32"
3/16"
Engine will not start Engine runs badly
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2 To obtain a correct sharpening the file must be carefully
held to maintain 3 basic angles:
– "A" Top angle
– "B" External, side angle
– "C" Internal, side angle
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).
The chainsaw runs
but does not cut well
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30° - 35°
85° - 90°
60°
Engine runs badly or
looses power when cutting
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UK
5