Oil Seal Product Installation Methods

The subject of installation represents and area commonly overlooked when selecting and oil seal for an application. Studies have shown this area to be one of the major causes of premature seal failure. The assist the installation, the oil seal should be pre-lubricated with grease or oil to reduce sliding friction of contact surfaces. This will also help protect the seal lips during initial run-in.

Housing Installation

Improper Methods Acceptable Methods

An installation tool should always be used when installing an oil seal. The use of a tool can make installation easier and lower the possibility of seal cocking. A hydraulic or pneumatic press is advised to supply necessary force to install the seal. The figures describe examples of both recommended and improper installation methods. In each preferred method, installation load is absorbed by either housing or bottom plate to prevent seal damage and to locate the seal properly within the bore.

Shaft Installation
The advisable sequence of installation is to install the seal over the shaft and then into the housing bore. Care should be exercised to not damage or deform the seal lip. The proper chamfer angle will minimize this problem. When the shaft must be installed through the seal, the centering grids for the shaft will prevent the deformation of the lip and the dislodging of the spring. If possible, the shaft should be rotated as it passes through the seal to reduce sliding friction