Installing PTFE auto oil seals the Right Way
Conventional shaft seals have commonly been made of a flexible polymer (synthetic rubber) with a tensioning spring that compresses the sealing lip against the smooth shaft sealing surface. Seals keep oil in; and keep dirt and water out.rubber auto seals.
The latest seal technology uses PTFE (Teflon?), desirable for its low friction, self-lubricating surface, and excellent sealing qualities, even in temperature extremes (-130°C to +200°C). Since it also has a superior thermoplastic “memory” that returns it to its original shape when heated, the PTFE seal needs no internal garter spring to keep its lip tensioned against the shaft circumference. It is also more resistant to chemical degradation from oils, acids, and oxidizers.Installing PTFE auto oil seals the Right Way.
Tips for Installing PTFE Seals
Do not remove the protective packaging until you are ready to install the seal. Dirt on the sealing surface can abrade the lip, causing a leak.mechanical auto seal.
Install PTFE engine auto oil seals dry. Both the seal and shaft sealing surface must be oil-free, or the seal may leak. (This is opposite what we have always done when installing synthetic rubber seals.)
PTFE seals ship with a plastic sleeve to keep the lip round. Do not remove the sleeve until you are ready to install the seal. Some sleeves can double as an installation guide; if not, use the installation method recommended by the manufacturer.valve auto seals. This may require a dedicated installation cone with a tapered snout that eases the lip onto the shaft, or a thin-walled plastic guide tube.Installing PTFE auto oil seals the Right Way.
PTFE is durable, but less pliable than previous seal materials. Inspect the chamfered edge of the shaft for nicks or blemishes that can cut the sealing lip.
Install the seal squarely. Make sure the lip is perpendicular to the shaft centerline. car auto seals.If possible, adjust the installation depth slightly so the lip will ride on a “fresh” area of the shaft sealing surface, not on a wear band cut by the old seal (see the illustration).Installing PTFE auto oil seals the Right Way.
Conventional shaft seals have commonly been made of a flexible polymer (synthetic rubber) with a tensioning spring that compresses the sealing lip against the smooth shaft sealing surface. Seals keep oil in; and keep dirt and water out.rubber auto seals.
The latest seal technology uses PTFE (Teflon?), desirable for its low friction, self-lubricating surface, and excellent sealing qualities, even in temperature extremes (-130°C to +200°C). Since it also has a superior thermoplastic “memory” that returns it to its original shape when heated, the PTFE seal needs no internal garter spring to keep its lip tensioned against the shaft circumference. It is also more resistant to chemical degradation from oils, acids, and oxidizers.Installing PTFE auto oil seals the Right Way.
Tips for Installing PTFE Seals
Do not remove the protective packaging until you are ready to install the seal. Dirt on the sealing surface can abrade the lip, causing a leak.mechanical auto seal.
Install PTFE engine auto oil seals dry. Both the seal and shaft sealing surface must be oil-free, or the seal may leak. (This is opposite what we have always done when installing synthetic rubber seals.)
PTFE seals ship with a plastic sleeve to keep the lip round. Do not remove the sleeve until you are ready to install the seal. Some sleeves can double as an installation guide; if not, use the installation method recommended by the manufacturer.valve auto seals. This may require a dedicated installation cone with a tapered snout that eases the lip onto the shaft, or a thin-walled plastic guide tube.Installing PTFE auto oil seals the Right Way.
PTFE is durable, but less pliable than previous seal materials. Inspect the chamfered edge of the shaft for nicks or blemishes that can cut the sealing lip.
Install the seal squarely. Make sure the lip is perpendicular to the shaft centerline. car auto seals.If possible, adjust the installation depth slightly so the lip will ride on a “fresh” area of the shaft sealing surface, not on a wear band cut by the old seal (see the illustration).Installing PTFE auto oil seals the Right Way.
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