Landoll 330C, Руководство оператора

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4-20 F-475-0611 Edition
MAINTENANCE AND LUBRICATION
Figure 4-12: Outboard Mount Hub and Drum
Hub and Drum Maintenance
1. Clean and inspect the brake drums whenever relining
the brakes. To be suitable for further service, the
brake drum should pass the following checks.
a. The brake surface should be free of scoring,
excessive heat checks and cracks.
b. The brake surface diameter should be within the
maximum diameter cast or stamped on the drum.
c. The mounting holes and pilot must be round and
true.
d. The mounting surface must be clean and flat.

WARNING
2. It may be necessary to turn or resurface the braking
surface to remove small heat checks or other surface
defects resulting from normal use.
3. The maximum diameter cast into the back plate
portion of the brake drum is the maximum diameter
or discard diameter to which the brake drum may be
turned or worn and still be usable. If any portion of
the brake surface exceeds the maximum diameter it
must be discarded. The maximum is .120 over the
nominal new diameter unless stated otherwise on the
casting. The maximum diameter cast into the brake
drum supersedes all published information.
4. When resurfacing a drum, allow at least 0.040 inches
under the maximum diameter for additional wear.
Failure to replace faulty brake drums will result in
an unreliable braking system, and may lead to an
accident.