Floating Ring Seal Assembly/Installation
Failures are usually caused by combinations of factors
rather than one single cause, but many failures have
one common denominator: – ASSEMBLY ERROR!
Floating ring seals should ALWAYS be installed in
MATCHED pairs: that is, two new rings OR two rings
that have previously run together. NEVER assemble
one new ring and one used ring; or two used rings that
have not previously run together.
ALWAYS USE NEW TORIC RINGS!!
1. Inspect seal surfaces and mounting cavities for
rough tool marks or nicks that may damage rub-
ber seal rings. Hone smooth and clean, if re-
quired. Remove any oil, dust, protective coating
or other foreign matter from the metal seal rings,
the toric rings, and both the housing and seal ring
ramps. Use tri-chloroethane #111 which is a
non-petroleum base, rapid drying solvent leaving
no film. Allow surfaces to dry completely. Use
clean, lint-free material such as “Micro-Wipes
#05310" for cleaning and wiping.
When using tri-chloroethane or any solvent, avoid
prolonged skin contact. Use solvents only in well
ventilated areas and use approved respirators to
avoid breathing fumes. Do not use near open flame
or welding operations or other heated surfaces
exceeding 900°F (482°C). Do not smoke around
solvents.
Both ramps must be dry. Use clean, lint-free
cloths or lint-free paper towels for wiping.
NOTE: Oil from adjacent bearing installations or seal
ring face lubrication
MUST NOT
get on the ramp or
toric
until after both seal rings are together in their
final assembled position
.
2. Install the rubber toric on the seal ring.
Make sure it is
STRAIGHT
! Make sure the
toric ring is not twisted and that it is seated
against the retaining lip of the seal ring ramp. Use
the flash line as a reference guide to eliminate
twist.The flash line should be straight and uniform
around the toric.
NOTE: Handle seal carefully;
nicks and scratches on
the seal ring face cause leaks
.
1. Seal Ring
2. Rubber Toric
3. Housing Retainer Lip
4. Housing Ramp
5. Seal Ring Housing
6. Seal Ring Face
7. Seal Ring Ramp
8. Seal Ring Retainer
Lip
FIGURE 5-13. SEAL TERMINOLOGY
J05018 03/01 Disc Brake Assembly J5-11
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