Ryobi RY10521B Operator's Manual page 31

 Tighten the mounting screw with wrench until
snug.
 From the snug position, tighten the mounting
screw an additional 3/4 of a turn using a wrench.
 Check the security of the SAFE-T-TIP nose
guard and its mounting screw before each use
of the chain saw.
MAINTAINING THE SAFE-T-TIP
GUARD
See Figures 59 - 60.
CAUTION:
Make sure the chain has stopped before you
do any work on the saw.
WARNING:
Although the guide bar comes with a SAFE-
T-TIP antikickback device already installed,
®
check the tightness of the mounting screw
before each use.
Use the following instructions to tighten the mount-
ing screw of the nose guard. These are specially
hardened screws. If you cannot install the screw
tightly, replace both the screw and the SAFE-T-TIP
before further operation.
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 SAFE-T-TIP
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
additional 3/4 of a turn using a wrench.
MAINTENANCE
NOSE
®
TIGHTEN 3/4
OF A TURN
®
also
®
CLEANING THE AIR FILTER
See Figures 61 - 64.
 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 carbure-
tor, blow or brush as much loose dirt and saw-
dust from around the carburetor and chamber
as possible.
NOTE: Make sure to pull the choke rod out to
keep the carburetor from being contaminated.
Page 31 — English
MOUNTING
SCREW
SAFE-T-TIP
®
PUSH DOWN KNOB AND
TURN TO UNLOCK
KNOB
AIR FILTER
COVER
Fig. 59
Fig. 60
Fig. 61