What is the recommended approach to address a hydraulic system leak around a seal?

• A. Inspect the housing and seal
• B. Replace worn seals
• C. Check for shaft damage or misalignment
• D. All of the above

Answer: (D)

Leaks around a hydraulic seal usually come from more than one contributing factor, so a thorough approach covers all parts involved. Start by inspecting the housing and the seal to look for wear, cracks, or an imperfect seating surface that could let fluid bypass the seal. If you find worn or damaged sealing surfaces, replace the worn seals to restore proper contact and sealing. Also check the shaft for damage or misalignment, since a bent, scored, or misaligned shaft can prevent the seal from seating correctly and cause ongoing leakage even after a new seal is installed. Because leakage often results from a combination of seal wear, seating surface condition, and shaft condition, addressing all three areas together provides the most reliable repair.