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(9)
Assembly of the face seal
1 Seal ring
2 Rubber toric ring
3 Housing retaining lip
4 Housing ramp
5 Seal ring housing
①
Seal rings, torics, and housings must be clean and free of any oil film, dust, or other foreign
matter. Use a solvent that evaporates quickly, leaves no residue, and is compatible with the
rubber toric rings. The recommended solvent is lsopropanol. Ring and housings should be
wiped with a solvent-soaked lint free cloth or paper towel.
②
After all components have been wiped clean, the torics should be installed on the metal seal
rings so that they rest in the radius on the tail of the metal ring. Insure that the torics are not
twisted by inspecting the mold flash line on the outside diameter of the toric for true
circumferential tracking around the seal. Twisted torics will case nonuniform face load that can
result in leakage of lubricant and pumping of debris past the toric. If a twist is apparent, it can be
eliminated by gently pulling a section of the toric radially away from the metal seal ring and letting
it "snap" back. Repeating this in several places around the ring will eliminate any twist in the toric
ring.
③
Put the toric ring(2) on seal ring(1), at the bottom of the seal ring ramp(7) and against the
retaining lip(8).
④
The toric ring(2) can twist if it is not wet all around during installation or if there are burrs or fins on
the retaining lip(3) of the housing(5).
⑤
Eliminate toric twist by gently pulling a section of the toric(2) rapidly away from the seal ring(1)
and letting it "snap" back.
⑥
Place the installation tool around the seal ring and dip the seal ring into a pan of lsopropanol
solvent to lubricate the toric ring. It is essential to lubricate the toric with lsopropanol so that the
toric will slip past the housing retaining lip and seal uniformly in the housing nose radius.
Insufficient lubrication can cause poor seal performance due to nonuniform loading(twisted torics
or cocked seals). Use of solvents other than lsopropanol can leave a residue on the toric or
ramps and allow the toric to slide rather than roll in seat. This can also result in poor seal
performance due to nonuniform loading.
3-133
1
2
3
4
5
100D7XL46
100D7XL47~49
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