Chain Brake; Oil Pump (Automatic/Adjustable) - Efco 147 Operator's Instruction Manual

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MAINTENANCE
• Remove the muffler shield (C), cover (D) and diffuser (E).
• Remove the muffler body screw (F) and muffler body (G).
• Clean and inspect the spark arrester screen (A).
• Reassemble components in reversed order of removal and
torque the screw to 45 in/lbs (4.9 Nm) and the muffler nuts to
70 in/lbs (7.9 Nm).
WARNING: If the spark arrester screen is damaged,
B
faulty or deteriorated, replace the muffler body or
entire muffler assembly.
94
The Spark Arrester System needs a periodic and accurate
maintenance and cleaning, in particular:
- check periodically the spark arrester screen and substitute it
when holes, bends or deformations appear;
- check carefully if dust, debris or organic material is in contact
with parts of the Spark Arrester System; check especially the
gap between the muffler and the shield; clean it often with
tools or shop air.
In this chainsaw the spark arrester screen is integral part of the inner
half of the muffler body; if the screen needs to be replaced, please
order the whole inner part p.n. 50050186 (G, Fig. 93 page 33).
For compliance with the standard, two spiked bumpers p.n.
50070033 (A, Fig. 94) and p.n. 50070062 (B) have to be mounted,
as provided on the chainsaw in the box.
95
WARNING: Do not operate your chainsaw if the muffler
is damaged, missing or modified. An improperly
maintained muffler will increase the risk of fire and
hearing loss.

Chain Brake

If the chain brake does not work properly, remove the clutch
cover and clean the chain brake components. Check for wear on
the brake band (A, Fig. 95) and replace if worn or deformed.
WARNING: If the brake band is worn too thin it
may break when the chain brake is triggered. With
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a broken brake band, the chain brake will not stop
the chain. The chain brake should be replaced by an
authorized service dealer if any part is worn to less
than 0.02" (0.6 mm) thick. Repairs on a chain brake
should be made by an authorized service dealer.
Take your unit to the place of purchase if purchased
from a servicing dealer, or to the nearest authorized
service dealer.
Always keep the chain brake mechanism clean and lightly
lubricate the linkage (B, Fig. 96).
Always test the chain brake performance after servicing or
cleaning per the Operation - Chain Brake Section.
WARNING: Check and, if damaged, replace the chain
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catcher/safety stop (C, Fig. 95).

Oil Pump (Automatic/Adjustable)

Flow adjustment is pre-set by the manufacturer. Oil flow can be
adjusted by the operator according to specific requirements by
means of the special adjusting screw (D, Fig. 97). Oil flow occurs
only when the chain is moving.