🔍 Key Concepts

• Lip-type oil seal construction – metal case, elastomer (neoprene) lip, and garter spring • Function of the garter spring in maintaining sealing at the shaft contact point • Difference between sealing pressure vs. maintaining contact pressure on the shaft

💭 Think About

• Think about what part of the seal actually touches the rotating shaft and what happens to that contact over time without any extra force. • Ask yourself: is the spring meant to handle system fluid pressure, or to ensure the flexible lip keeps pressing properly on the shaft? • Consider which option best describes a continuous, gentle force that compensates for wear and keeps the seal effective.

✅ Before You Answer

• Verify how a neoprene (rubber) lip behaves over time with heat, wear, and minor shaft eccentricity. • Confirm whether the spring is located at the contact edge of the lip or in a position to block air elsewhere in the system. • Check which choice describes a function related to maintaining tight contact of the lip on the shaft, rather than changing system pressure or cleaning the shaft.