Warner Electric Blade Brake Clutch Application Guide User Manual
Page 10
10
Warner Electric • 800-825-9050
P-1319-WE • 819-0465
1
Check Mounting:
A. Shaft End Mounting: must have clearance between BBC hub and ground drive pulley, shaft
end runout to be 0.001 inches maximum.
B. Shoulder-mounting: Inner race of top plate bearing is in contact with crankshaft shoulder, spacer
or ground drive pulley. Clearance must be maintained between the bottom of the BBC bore and
the end of crankshaft. Shoulder runout to be held to maximum 0.001 inches and parallelism across
a spacer or ground drive to be held to maximum 0.001 inches
2
Mounting Bolt Torque: 48 lbs.ft. ± 3 lbs.ft. (65NM ± 5NM) ( 3/8-24 UNF or M10X1.25-6g) Make sure
the mounting bolt does not bottom in crank threaded bore.
3
Anti-rotation: anti-rotation device allows axial movement of BBC. Min. pin dia. 0.469"
Note: Perform Steps 4 & 5 (of this check list) before return spring and cable are attached.
4
Position actuation arm so that BBC is in the full braked position, then mark leading edge position
on deck.
5
Position actuation arm so that BBC is in the full clutched position, then mark leading edge position
on deck.
6
Clearance: Adequate clearance for all parts of the BBC in both braked and clutched modes.
Insure that the BBC does not bind or rub on any part of mower.
7
Attach Brake Actuation Spring: Brake actuation spring must have enough force to rotate the brake
plate to the fully braked position.(See Step # 4, of this check list)
8
Control Cable: Control cable must have sufficient stroke to rotate the actuation arm from the
positive stop in the braked mode to the positive stop in the clutched position (adjust if necessary).
(use of an over travel spring will allow for cable stretch and manufacturing tolerances.
(See Steps # 4 & 5, of this check list)
9
Engine Oil Drain plug: Instruct end user to remove oil from the filler tube and not from drain plug.
Do not allow oil to contaminate BBC, replacement of BBC will be required if oil contamination occurs.
10 Operation temperature: Top plate bearing not to exceed 220 degrees F.
11 Shrouds: Warner Electric does not recommend the use of shrouds.
12 Blade design: Blade design to be designed so that its natural frequency is above driving
frequency of engine.
13 Engine inertia: Fly wheel of sufficient size to allow for starting without the added inertia of the blade.
Quick Review Check List for BBC Applications
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