Black Max BM5020 Operator's Manual page 32

NOTE: Do not replace the screw with an ordinary
screw. Use only identical replacement parts from the
manufacturer when replacing parts.
In addition to preventing chain contact with solid
objects at the nose of the bar, the safety tip also
helps keep the chain away from abrasive surfaces,
such as the ground. Keep it on the right hand side
of the bar where it will be between the chain and the
ground during flush with ground cutting.
The mounting screw requires a 5/16 in. wrench (or
adjustable wrench) to achieve the recommended
torque of 35 to 45 in.lb. A torque within this range
can be achieved by using the following method.
 Tighten the screw with wrench until snug.
 From the snug position, tighten the screw an ad-
ditional 3/4 of a turn using a wrench.
CLEANING THE AIR FILTER
See Figures 59 - 62.
 Push down on the knob on top of the air filter
cover and rotate counterclockwise to unlock. Lift
cover straight up to remove; set aside.
 Before removing the air filter from the carburetor,
blow or brush as much loose dirt and sawdust from
around the carburetor and chamber as possible.
NOTE: Make sure to pull the choke rod out to
keep the carburetor from being contaminated.
 Using the combination wrench provided or a flat
blade screwdriver, remove the screw securing the
air filter.
 Position a flat screwdriver between the tabs and
twist to release from the air filter base.
 Lift the air filter off the air filter base.
Choose one of the following cleaning options:
 To lightly clean, tap the filter against a smooth,
flat surface to dislodge most saw dust and dirt
particles.
 After every 5 hours of operation, clean in warm
soapy water, rinse, and let dry completely. Replace
with a new filter after every 25 hours of use.
NOTE: An alternate method is to clean the filter
with compressed air. Always wear eye protection
to avoid eye injury.
 Reinstall air filter and screw, making sure that tabs
on air filter are located in channels on air filter
base.
MAINTENANCE
 Reinstall air filter cover. Push down on knob and
rotate clockwise to secure.
 Clean the pre-filter every 5 hours of use or sooner,
if required. Remove the cylinder cover, starter as-
sembly, and the fan housing baffle for access to
the pre-filter in the engine housing.
NOTE: If you use an air hose for drying, blow
through both sides of filter.
NOTICE:
Make sure the air filter is correctly placed in the
air filter base before reassembly. Never run the
engine without the air filter, as this may cause
serious damage to the chain saw.
Page 32 — English
PUSH DOWN KNOB AND
TURN TO UNLOCK
KNOB
AIR FILTER
COVER
AIR FILTER
COVER
SCREW
AIR FILTER
FAN
HOUSING
BAFFLE
STARTER ASSEMBLY
Fig. 59
Fig. 60
PRE-FILTER
Fig. 61