Warner Electric Blade Brake Clutch Application Guide - Manual (Page 8)

VI. Performing Maintenance on the
Warner Electric BBC
Please note that either the Troubleshooting Guide
(see page 9) or a Warner Electric
representative should be consulted to determine
which component needs to be replaced.
A. Replacing the Output hub / Lower Assembly
1. Remove the lawn mower blade from the
BBC by removing the blade mounting
bolts.
2. Remove the lower assembly from the
BBC. Install the new lower assembly
to the BBC.
3. Check hub disc on upper assembly for
excessive wear or discoloration
(Blue/Straw etc.) this could indicate
that the clutch has become overheated.
If this is the case, replace the complete
clutch. (See Table 1, page 4)
4. Reinstall the mower blade.
5. Burnish the BBC per the burnish
instructions (see section VI. Step C.)
B. Replacing the complete BBC Assembly
1. Remove the lawn mower blade from
the BBC by removing the blade
mounting bolts.
2. Remove the brake actuation spring
and remove the BBC mounting bolt.
3. Disconnect the BBC actuation cable.
4. Remove the complete BBC assembly
using the removal threads.
Note: On some applications the BBC
brake assembly will not easily fit through
the space allowed in the mower deck.
In this instance, the mower engine
mounting bolts must be removed and
the mower engine lifted off of the deck
so that the brake assembly can be
removed.
8 Warner Electric • 800-825-9050 P-1319-WE • 819-0465
5. Install the new complete BBC assembly
directly to the engine crankshaft.
(See Section V) In the case where the
mower engine was lifted up, remount
the engine to the mower deck.
(See Table 1, page 4)
6. Burnish the BBC per the burnish
instructions (see Step C below).
C. BBC Burnish Instructions
Burnish the BBC whenever either the clutch
assembly or the brake assembly is replaced
without replacing the mating component. The
mower should be fully functional before this
burnish procedure is initiated. The burnish
procedure consists of the following steps:
1. Start the lawn mower engine.
2. Run the mower engine at the maximum
engine speed. Allow the mower engine to
run a sufficient amount of time so that the
engine will not stall upon engagement of
the blade.
3. With the engine running at maximum engine
speed, engage and disengage the BBC a
minimum of 15 times.