Chain Brake; Mechanical Test - McCulloch TimberBear TM502 User Manual

TO ADJUST SAW CHAIN:
1. Loosen the bar retaining nuts (Figure 3-3C). Hold nose
of guide bar up and turn adjustment screw (D) CLOCK-
WISE to increase chain tension. Turning screw COUN-
TERCLOCKWISE will decrease amount of tension on
chain. Ensure the chain fits snugly all the way around
the guide bar (Figure 3-4B).
2. After making adjustment, and while still holding nose of
bar in the uppermost position, tighten the bar retaining
nuts securely. Chain has proper tension when it has a
snug fit all around and can be pulled around by gloved
hand.
NOTE: If chain is difficult to rotate on guide bar or if it binds,
too much tension has been applied. This requires minor
adjustment as follows:
A. Loosen the 2 bar retaining nuts so they are finger tight.
Decrease tension by turning the bar adjustment screw
COUNTERCLOCKWISE slowly. Move chain back and
forth on bar. Continue to adjust until chain rotates freely,
but fits snugly. Increase tension by turning bar adjust-
ment screw CLOCKWISE.
B. When saw chain has proper tension, hold nose of bar
in the uppermost position and tighten the 2 bar retain-
ing nuts securely.
D

3-5. CHAIN BRAKE

Your chain saw is equipped with a CHAIN BRAKE
reduces possibility of injury due to kickback. The brake is
activated if pressure is applied against brake lever when,
as in the event of kickback, operator's hand strikes the
lever. When the brake is actuated, chain movement stops
abruptly.
WARNING
The purpose of the CHAIN BRAKE
bility of injury due to kickback; however, it cannot provide
the intended measure of protection if the saw is operated
carelessly.
Always test the CHAIN BRAKE
periodically while on the job.
3 - REMOVING & INSTALLING BAR & CHAIN
3-4B
®

MECHANICAL TEST

® is to reduce the possi-
® before using your saw and
To Test CHAIN BRAKE
1. The CHAIN BRAKE
move) when BRAKE LEVER IS PULLED BACK AND
LOCKED (Figure 3-5A).
2. The CHAIN BRAKE
when brake lever is in forward position. You should not
be able to move chain (Figure 3-5B).
NOTE: The brake lever should snap into both positions. If
strong resistance is felt, or lever does not move into either
position, do not use your saw. Take it immediately to an
Authorized Service Center for repair.
® that
9
® :
® is DISENGAGED (chain can
® is ENGAGED (chain is stopped)
3-5A
3-5B