Flowserve Pac-Seal Type 51 - Manual (Page 6)

2.4 Lubricate inner diameter (ID) of the rotating seal head elastomer
bellows with Pac-Ease. Note: For smaller diameter seals it may be
easier to lubricate the shaft.
2.5 Clean both rotating and stationary seal faces with a lint free rag
and isopropyl alcohol. Note Any oil or grease, assembly lubricant,
fingerprints, or other residue from the installation process can cause
the seal to leak.
2.6 Type 51
Slide the rotating seal head by hand along the shaft to a completely
parallel contact with the stationary seat. Where possible, prior
to installation remove the drive adapter (75) in order to expose
the back of the elastomer bellows. Apply pressure to the back of
the metal shell and elastomer bellows. Applying pressure to both
the metal shell and bellows is important to minimize stretching of
bellows on the shaft relative to the rotating seal head. If the drive
adapter (75) is not able to be removed from the seal assembly it
is recommended to push the seal head slightly past its operating
position on the shaft, so when the installation force is removed, it
springs back into the operating position. Replace the driver adapter
if removed. Avoid extreme installation pressure or hammering of the
seal.
Type 52
Slide the rotating seal head by hand along the shaft to a completely
parallel contact with the stationary seat. Apply pressure to the back
of the metal drive adapter/shell and elastomer bellows. Applying
pressure to both the metal drive adapter/shell and bellows is
important to minimize stretching of bellows on the shaft relative
to the rotating seal head. Avoid extreme installation pressure or
hammering of the seal.
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