Steering pump lines are high-pressure hydraulic hoses connecting the power steering pump to the steering gear/rack and return reservoir. These lines deliver pressurized hydraulic fluid, enabling power steering assist. Constructed of reinforced rubber or stainless steel braiding, they must withstand substantial pressure and temperature fluctuations. Fittings are vehicle-specific, employing double-seal designs to prevent leaks. Failure typically manifests as fluid loss, steering difficulty, or noise, necessitating complete line replacement rather than repair.