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Difficulty: MediumSuspension System Inspection

During a commercial vehicle suspension inspection, the presence of light oil misting or a dry dust-oil film on the body of a hydraulic shock absorber is classified as an active leak requiring the vehicle to be placed out of service.

Answer: Answer

Answer

False. Light surface misting on a shock absorber is considered normal operational seal lubrication and is not an out-of-service defect.
The statement is false. Commercial vehicle inspection standards clarify that a light film of oil mist or dust-attracting sweat on a shock absorber body is normal operational behavior. A suspension defect is only recorded when hydraulic fluid is actively running, dripping, pooling, or if the shock absorber mounting brackets and hardware are damaged or missing.

Step-by-Step Solution

1
Identify the suspension component and the specific condition described in the statement.
The component is a hydraulic shock absorber displaying light oil misting with road dust accumulation.
Accurate defect classification depends on identifying the exact component and nature of the visible residue.
2
Evaluate the observed condition against commercial driver vehicle inspection guidelines.
Normal seal lubrication causes slight weeping or misting, whereas a defective shock absorber exhibits active fluid dripping, streaming, or physical breakage.
Commercial motor vehicle safety criteria differentiate acceptable operational wear from critical safety violations.
3
Determine the validity of classifying light misting as an out-of-service violation.
The statement is false because light misting does not constitute a defect or an out-of-service condition.
Placing a vehicle out of service requires a critical defect such as severe leakage, missing hardware, or structural failure.

Key Concept

Distinction between normal shock absorber misting and active hydraulic leaks during pre-trip inspection
Estimated Time:1m 0s
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Topics

Suspension System Inspection

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