Imported Parallel Car Mercedes-Benz 0049974552 Steering Wheel Oil Pipe

Distinguishing method: the high-pressure pipe is thicker and harder, connected to the power pump outlet; the oil return pipe is thinner and softer, connected to the oil storage pot. Four oil pipe division of labor (some models) power pump inlet and outlet oil pipe each 1 (high pressure oil + low pressure oil return); steering hydraulic cylinder left and right control oil pipe each 1, responsible for promoting the steering rack.

Common Problems and Solutions

Oil leaks/seepage

Causes:

Aging and cracking (especially in winter when the rubber hardens);

Loose clamps or failed seals;

High pressure due to frequent beating of the steering wheel. The reason of oil leakage/seepage: aging and cracking; loose clamp or seal failure; high pressure due to frequent beating of direction.

Steps:

① Clean the oil leakage point and confirm the high pressure hose or oil return hose;

② Oil leakage from the oil return hose: Replace the oil-resistant hose (the inner diameter should be matched, e.g., 10mm), and fix it with a spring clamp + screw clamp;

③ High-pressure hose leakage: must replace the original parts, the sub-factory parts are easy to mismatch due to the inner diameter of the rattles / booster failure.

Burst/rupture

Emergency treatment: Stop the car immediately to avoid loss of direction control;

Temporarily seal the leakage point (e.g. tape wrapping) and replenish the booster oil, drive to the repair point at low speed. Root cause:

Clogged oil pipe leading to pressure surge (need to check the whole oil circuit);

Poor quality parts or improper installation.

Replacement and exhaust operation guide

Steps for replacing the oil pipe

Empty the old booster oil and disassemble the old oil pipe (pay attention to the direction of the interface);

After installing the new pipe, pour the oil to the MAX line, and start the engine;

Key operation: Beat the steering wheel left and right for 3~5 times, and discharge the air (accompanied by "buzzing"). Key operation: beat the steering wheel left and right 3~5 times to discharge the air (accompanied by "buzzing" sound is normal). The consequences of exhaust is not complete heavy direction, booster pump whistling; the need for the second exhaust: release the bleeder valve to connect the plastic pipe to the oil pot, idle running until no air bubbles.

Fourth, precautions and risk prevention

Accessories selection

High pressure hose must use the original parts (Example: BMW 32416786384, Honda 53713-SNA-A06); to avoid the sub-factory parts of the internal diameter deviation resulting in insufficient pump pressure. Operation taboos prohibit beating the direction of death for more than 3 seconds to reduce the load on the pump body; need to check the fluid level after replacement: between MIN ~ MAX when cold, the fluid level rises after warming up is normal. Associated Failure Exhaustion Oil leakage accompanied by directional noise → check the power pump bearing/blade wear; still seeping oil after changing the tube → focus on inspecting the oil pot cracks or inductor sealing ring. Tip: If the oil leakage leads to the lack of booster oil, you need to synchronize the cleaning of the oil circuit to avoid impurity damage to the new pump.

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