Chain Brake - Shindaiwa 285s Owner's/Operator's Manual

Chain Brake Operation and Service
Chain Brake Operation
This saw is equipped with a dual func-
tion chain brake designed to stop the
saw chain from rotating whenever
kickback occurs.
IMPORTANT!
The chain brake system for models 85s
and 35s is not adjustable! If the chain
brake fails to stop the chain in any of
the following steps, DO NOT USE THE
SAW! Return the saw to your dealer for
repairs.
Chain Brake Testing
Step 1: Inertia Chain Brake
Function (engine "off")
Use the following procedure to
test for proper operation:
1. Turn the engine "off," and verify that
the ignition switch is in the "O" or
"off" position.
. Hold the chain saw normally gripping
the rear handle with the right hand
and the front handle with the left
hand. While keeping the chain saw
level, hold the nose of the guide bar
approximately 14 inches above a solid
wood block. Release the front handle
only and allow the guide bar nose to
drop onto the wood. The chain brake
lever should move forward to posi-
tion  and activate the brake as soon
as the nose strikes the wood block.
Wearing gloves, make sure that the
saw chain cannot be pulled around
the guide bar.
Both of the above testing procedures must cause the chain brake to engage and prevent the saw chain from mov-
ing! If the chain brake does not fully engage and prevent the saw chain from moving during either test, DO NOT
OPERATE THE SAW! Return the saw to your dealer for repairs!
Chain Brake Maintenance
 Periodically clean the brake mecha-
nism of sawdust or debris.
 If the chain brake becomes damaged
or worn, or fails to completely engage
or release the clutch drum, return the
saw to your dealer for repairs.
 Never carry the saw by the brake le-
ver! Carry the saw by the front handle.
13
 Engaging the brake lever causes a
brake band to tighten around the
clutch drum, stopping the saw chain.
 The chain brake is designed to
engage whenever the brake lever
strikes the operator's hand or from
the inertial effects of kickback.
 The chain brake can also be activated
by pushing the brake lever forward
manually.
To release (disengage) the chain brake,
pull the brake lever rearward, towards
the front handle until a positive stop is
felt. (Position 1).
Step 2: Manual Chain Brake
Function (engine running)
Use the following procedure to
test for proper operation:
1. Start the saw and warm the engine to
operating temperature.
. With the saw on a flat stable surface,
maintain a firm grip on the rear
handle with the right hand and the
top of the front handle with the left
hand. The left hand should be cen-
tered with the front hand guard.
CAUTION!
Operating the saw at wide open
throttle for longer than 5 seconds
without a load could result in engine
damage.
3. Accelerate engine to full throttle,
then, without releasing the front han-
dle, roll the left wrist forward against
the front hand guard/chain brake
lever to push the brake lever for-
ward until the chain brake activates
(position ). The saw chain must stop
immediately. If either of step 1 or
step  tests fail, contact an authorized
shindaiwa dealer for repairs.
WARNING!
CAUTION!
Never start or operate this saw while
the chain brake is activated!
 Always stop the saw and disengage
the chain brake before removing or
replacing the clutch cover!
WARNING!
The chain brake is installed only to
reduce the risk from kickback! The
chain brake is not a substitute for
careful operation!
IMPORTANT!
Release the throttle whenever the chain
brake is activated!
Step 1
Step 2
1
Chain Can Move
 Never make carburetor adjustments
while the chain brake is engaged!
Chain
2
Stopped