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Cutting Attachment
Guide bar with oil inlet and locating holes
The cutting attachment of a chain saw consists of the guide
bar, saw chain and chain sprocket.
Guide bar
The nose and underside of the guide bar are subjected to
particular high stress and strain. To avoid one-sided wear,
turn the gUide bar over every time you resharpen or replace
the chain. Regular cleaning of the oil inlet holes and the
guide bar groove is also very important.
The guide bar can be examined for signs of wear at the
same time. A minimum groove depth of 5 mm (0.2 in)
must be maintained in order to avoid the drive link tangs
scraping the bottom of the groove· (the cutters and tie
straps would not be able to run on the guide bar rails).
This depth should be measured at the spot where the bar is
stressed most, i. e. the bar nose on Duromatic bars and
the area with which most cutting is done on Rollomatic
bars.
The guide bar must be replaced if the minimum depth
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cannot be maintained.
To lubricate the Rollomatic guide bar, place chain saw on
its side so that the bar nose is firmly supported. Clean the
grease hole and pump in grease while slowly pulling saw
chain around bar (sprocket rotates) so that bearing is
uniformly filled. When grease emerges at the hole on the
other side of the bar or around the nose sprocket, repeat
the procedure on the other side.
Chain lubrication
Never operate the chain saw without proper chain lubri-
cation. Check operation of chain lubrication and level in oil
tank before starting work.
Hold chain saw with mounted cutting attachment over a
light background. Take care, the Oilomatic chain must not
touch the ground, i. e. keep it at least 20 cm (8 in) clear of
the ground. Run the engine with half-throttle position. If an
increasing patch of oil can be seen, chain lubrication is
operating correctly.
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