This Jostic Seal, also known as a shaft seal or lip seal, is designed to prevent the leakage of lubricants or other fluids from rotating shafts and housings, while also excluding contaminants like dirt and water. It is typically made from durable elastomeric materials that maintain their sealing properties under pressure and temperature variations, unlike a worn or damaged seal which will allow fluid loss and contamination. Observable symptoms of a failing seal include visible fluid leaks around the shaft, excessive wear on the shaft surface, and potential contamination of the lubricant.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
Visible oil or grease leaks around a rotating shaft are the primary indicator of a failing Jostic seal. If left unaddressed, the leakage will increase, potentially leading to insufficient lubrication of the affected component. The consequence is accelerated wear on the shaft and bearing, which can result in premature component failure.
Carefully inspect the shaft surface for any burrs or damage that could nick the new seal during installation. Use a proper seal driver or a smooth-faced tool to press the seal in squarely, avoiding cocking it in the bore.
Inspect the shaft for wear or scoring and clean the seal housing thoroughly before installing the new seal.