Sight Glass Gasket, Leybold, Trivac, Part# 23973057 – vacstellar

This gasket sits between the sight glass window and the pump body. It gets squeezed to form a tight seal. This seal has two very important jobs.

First, it keeps the oil in. A worn-out gasket is the most common reason for an oil leak around the sight glass. Even a small drip can make a mess and lead to low oil levels.

Second, it keeps dirt and air out. A good seal protects the clean oil inside your pump from outside contamination. This helps your pump stay healthy.

Over time, heat and oil can make this gasket hard and brittle. When it loses its flexibility, it can’t seal anymore. Replacing it with this Leybold part (# 23973057) during maintenance is a smart, simple step. It ensures a perfect fit and a reliable seal for your new or cleaned sight glass.