Morbark 1415 - Bearing Inspection

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than .015", then the drum surface should be re-machined. If scoring or other
wear is greater than .090” on the diameter, the drum must be replaced. When
turning the drum surface, the maximum rebore diameter is as follows:
• 7" Brake Drum-7.090" diameter
• 10" Brake Drum-10.090" diameter
• 12" Brake Drum-12.090" diameter
• 12 1/4" Brake Drum-12.340" diameter
• 6K, 7K and 8K Rotor-1.03" minimum thickness
• 3.5K Rotor-.85" minimum thickness
The machined inner surface of the brake drum that contacts the brake magnet
is called the armature surface. If the armature surface is scored or worn
unevenly, it should be refaced to a 120 micro inch nish by removing not more
than .030" of material. To ensure proper contact between the armature face
and the magnet face, the magnets should be replaced whenever the armature
surface is refaced and the armature surface should be refaced whenever the
magnets are replaced.
Note: It is important to protect the wheel bearing bores from metallic chips
and contamination which result from drum turning or armature refacing
operations. Make certain that the wheel bearing cavities are clean and free
of contamination before reinstalling bearing and seals. The presence of these
contaminants will cause premature wheel bearing failure.
Bearing Inspection
Wash all grease and oil from the bearing cone using a suitable solvent. Dry the
bearing with a clean, lint-free cloth and inspect each roller completely.
CAUTION
Never spin the bearing with compressed air.
THIS CAN DAMAGE THE BEARING.
Hubs/Drums/Bearings