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AIRSTREAM CLASSIC TRAILER OWNERS MANUAL
BRAKE CLEANING, INSPECTION AND LUBRICATION
Your trailer brakes must be inspected and serviced at yearly intervals or more often as use and performance
requires. Magnets and shoes must be changed when they become worn or scored thereby preventing
adequate vehicle braking.
Cleaning and Inspection
Clean the backing plate, magnet arm, magnet, and brake shoes. Make certain that all the Parts removed are
replaced in the same brake and drum assembly. Inspect the magnet arm for any loose or worn parts. Check
shoe return springs, hold down springs, and adjuster springs for stretch or deformation and replace if
required.
Warning
: ASBESTOS DUST HAZARD
SINCE MOST BRAKE SHOE FRICTION MATERIALS NORMALLY CONTAIN ASBESTOS,
CERTAIN PRECAUTIONS NEED TO BE TAKEN WHEN SERVICING BRAKES.
1. AVOID CREATING OR BREATHING DUST.
2. AVOID MACHINING, FILING, OR GRINDING THE BRAKE LININGS.
3. DO NOT USE COMPRESSED AIR OR DRY BRUSHING FOR CLEANING. (DUST
CAN BE REMOVED WITH A DAMP BRUSH.)
Brake Lubrication
Before reassembling apply a light film of Lubricate or similar grease on the brake anchor pin, the actuating
arm bushing and pin, and the areas on the backing plate that are in contact with the brake shoes and magnet
lever arm. Apply a light film of oil on the actuating block mounted on the actuating arm.
CAUTION
: DO NOT GET GREASE OR OIL ON THE BRAKE LININGS OR DRUMS
MAGNETS:
Your electric brakes are equipped with high quality electromagnets that are designed to provide the proper
input force and friction characteristics. Your
magnets should be inspected and replaced if
worn unevenly or abnormally. As indicated
below a straightedge should be used to
check wear.
Even if wear is normal as indicated by your
straightedge the magnets should be replaced
if any part of the magnet coil has become
visible through the friction material facing
of the magnet. It is also recommended that the drum armature surface be re-faced when replacing magnets.
(See Brake Drum Section) Magnets should also be replaced in pairs (both sides of an axle). Use only
genuine Dexter replacement parts when replacing your magnets.
D-14
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