Airstream 2001 Bamby, Owner'S Manual

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AIRSTREAM SAFARI –BAMBI TRAILER OWNERS MANUAL 2001
D-17
HUB REMOVAL
Whenever the hub equipment on your axle must be removed for inspection or maintenance the following procedure
should be utilized.
1. Elevate and support the trailer unit per manufacturers' instructions.
2. Remove the wheel.
3. Remove the grease cap by carefully prying progressively around the flange of the cap. If the hub is an oil lube
type then the cap can be removed by unscrewing it counter- clockwise while holding the hub stationary.
4. Remove the cotter pin from the spindle nut or, in the case of E-Z Lube versions, bend the locking tang to the free
position.
5. Unscrew the spindle nut (counter-clockwise) and remove the spindle washer.
6. Remove the hub from the spindle, being careful not to allow the outer bearing cone to fall out. The seal will retain
the inner bearing cone.
BRAKE DRUM INSPECTION
There are two areas of the brake drum that are subject to wear and require periodic inspection. These two areas are
the drum surface where the brake shoes make contact during stopping and the armature surface where the magnet
contacts.
The drum surface should be inspected for excessive wear or heavy scoring. If worn more than .020" oversized, or
the drum has worn out of round by more than .015”, then the drum surface should be turned. If scoring or other wear
is greater than .090", the drum must be replaced. When turning the drum surface the maximum re-bore diameter is
as follows:
10" Brake Drum- 10.090"
12" Brake Drum- 12.090”
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 finish by removing not more
than .030" of material. To insure 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 RE-FACING
OPERATIONS. MAKE CERTAIN THAT THE WHEEL BEARING CAVITIES ARE CLEAN AND FREE OF
CONTAMINATION BEFORE REINSTALLING BEARINGS AND SEALS. THE PRESENCE OF THESE
CONTAMINANTS WILL CAUSE PREMATURE WHEEL BEARING FAILURE.