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Zorluk: Çok zorSteering System Inspection

To accurately measure steering wheel free play on a commercial vehicle equipped with hydraulic power steering during a pre-trip inspection, the engine must remain turned off to ensure hydraulic assist does not artificially mask loose mechanical linkages.

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The statement is false. The engine must be running to accurately measure steering wheel free play on a power steering system.
The correct answer is false. According to official CDL inspection standards, when checking steering play on a vehicle equipped with power steering, the engine must be running. Testing the free play with the engine turned off creates artificial slack inside the unpressurized steering gearbox, which leads to an inaccurate and exaggerated measurement. The maximum allowable play (e.g., 2 inches or 10 degrees on a 20-inch wheel) can only be properly verified when the hydraulic system is fully pressurized and engaged.

Adım Adım Çözüm

1
Identify the type of steering system specified in the statement.
The statement specifies a 'hydraulic power steering' system.
Inspection procedures differ significantly between manual and power steering systems.
2
Recall the official CDL pre-trip inspection standards for evaluating power steering free play.
Official standards mandate that the engine must be running when checking power steering free play.
The system must be properly pressurized to correctly evaluate the 10-degree or 2-inch maximum play limit.
3
Evaluate the mechanical reasoning provided in the statement.
The statement incorrectly claims the engine must be off to prevent hydraulic assist from masking loose linkages.
Without hydraulic pressure, the system inherently has artificial internal slack, making it impossible to get a true measurement of the mechanical linkages.

Anahtar Kavram

Power Steering Free Play Inspection Procedure
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Konular

Steering System Inspection

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