OPERATION
The blade stopping system on BBC models
uses a clutch/brake assembly on the crankshaft
that allows the engine to continue to run while
the blade stops rotating. The blade must stop
within three seconds after the blade control bail
is released.
Engaging the bail (back towards the handle)
moves the clutch actuator arm which moves the
brake plate away from the friction disc, allowing
the dutch to engage the blade.
When the bail is disengaged (released), the
brake plate contacts a friction disc and disen-
gages clutch, stopping blade rotation.
REMOVAL
A
SAFETY WARNING:
To
prevent ac-
cidental engine starting, disconnect
spark plug lead.
1
Using a piece of starter rope
or
spring
hook, remove return spring end from post on
engine mounting plate
Remove return spring from actuator arm.
Remove shoulder bolt and nut securing the half
clevis to actuator arm.
SAFETY WARNING: Wear gloves or
wrap sharp edges
of
the blade with
a
rag. Use
a
9/16"
closed end wrench or
a
socket and breaker bar to remove or tighten
the blade screws. Open end, adjustable
wrenches or ratchet drives should not be
used since
it
might slip causing Injury.
A
2
Remove the blade screws, turn counter-
clockwise. Remove the blade.
3
Remove socket head screw and washers
from clutch assembly. Install Lawn-Boy Clutch
Retaining tool Part
No.
61
1592,
into end of
crankshaft.
A
SAFETY WARNING: The clutch/
brake assembly
is
under
150
lbs
tension.
Do
not attempt to remove
it
without
using the special Clutch Retaining
Tool,
Part
No.
61
1592.
12-1
Actuator
Arm
Shoulder
Bolt
Clutch
Retaining
Tool
Part
No.
61
1592
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