A driver is evaluating the steering column, steering gear, and front axle linkages during a vehicle safety inspection. Which of the following findings represents an immediate safety hazard that requires the vehicle to be taken out of service?
- AThe power steering fluid level rests midway between the 'ADD' and 'FULL' marks on the dipstick while the engine is warm.
- The steering wheel moves 3 inches along the outer rim of a 20-inch wheel before the front tires begin to turn.Answer
- CThe power steering pump drive belt shows approximately 1/2 inch of deflection at the center of the belt span when pressed firmly.
- DThe tie rod and drag link connections are secured with tightly torqued castle nuts containing cotter pins.
Answer
The condition where the steering wheel moves 3 inches along the outer rim of a 20-inch wheel before front tires begin to turn is an out-of-service safety hazard.
On a commercial vehicle equipped with a 20-inch steering wheel and power steering, steering play should never exceed 10 degrees, or roughly 2 inches of movement at the steering wheel rim. A measured free play of 3 inches signifies hazardous mechanical wear or misadjustment in the steering gearbox or linkage, creating an out-of-service safety defect.
Step-by-Step Solution
Key Concept
Steering wheel free play tolerance limits and safety inspection criteria
Estimated Time:1m 0s