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Chain bar maintenance
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Roller nose bars should be lu6ricated with automotive
grease or SAE 140 transmissi'on lubricant when fueling,
or \' 'east twice per day. Use a grease gun. See figure.
The"-(omplete nose roller can also be soaked in a pan of
oil overnight.
Motor oil is recommended for the nose roller in winter
use.
Running in a new chain
Soak the chain in saw chain oil.
Install the chain as described on page 3. Start the engine
and let the chain run slowly for a few minutes.
Check that the oil pump is delivering oil.
Stop the engine and adjust the chain tension. Start the
engine and warm up the chain by making four or five
cuts in a sapling.
Stop the engine. Allow the chain to cool down, and re-
adjust chain tension.
Continue adjusting until the chain does not stretch any
more.
The chain must always be cold when carrying out this
adjustment.
Never touch the chain while the engine is running!
C~ain filing and
.0
o
o
Turn the bar over every workday to equalize wear on
rails. Clean out the bar groove and oil holes.
File the edges of the bar rails once every week to main-
tain a proper shape free from burr. See figure.
Never use a badly worn bar. It will shorten chain service
life.
maintenance
The chain can be sharpened with the chain fitted on the
bar, but it should then be given a little extra tension.
The chain supplied has a top plate filing angle of 30°
wich is suitable ,fur most types of wood. Maintain this
angle until _tbe chain cannot be filed back any more.
Using a file holder makes it easier to obtain the correct
angles. If the angle index of the file holder is kept parallel
with the bar, a top plate filing angle of 30° is automati-
cally obtained. By pressing the flat side of the file holder
against the cutter top plate, the file will automatically be
at the correct height.
File the chain to an 85° side plate angle, i.e. inclined
slightly forward.
Use a 7/32" file (5.5 mm) for a 3/8" chain, and a 3116"file
(4.8 mm) for a 0.325" chain.
Hold the file horizontally, and file away from you. Apply
pressure on the forward strokes only.
After sharpening all the cutters, check and adjust the
depth gauge setting. The chain supplied has a depth gauge
setting of 0.025 inch (0.65 mm) which can be increased to
0.030 inch (0.75 mm) when cutting softwood.
To ensure the same depth gauge setting on all the links,
use a file jointer designed for a 3/8" or 0.325" chain re-
~.--~tively.
~er
rivet a chain yourself. Contact a service workshop
with the special tools for this kind of work.
If any of the links have to be replaced, new links must be
filed back to the same size as the other links.
3/16" for 0.325" chain
;
FILING ANGLE
!
~
.
I
850
S:t_m_SIDE
PLATE A NGLE
I
I
I
I
I
Sf
"
.
\&00
TOP PLATE
1
CUTTING ANGLE
88
---=--:'::::0.025 in (softwood 0.030 in)
DEPTH GAUGE
SETTING
Always keep the cutters well sharpened, file lightly but
frequently.
~~G~ IN~~
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