A commercial vehicle operator is conducting a pre-trip physical inspection to verify that manual slack adjuster pushrod free play is within legal safety tolerances. Arrange the procedural steps in the correct chronological sequence to perform this measurement safely and accurately.
- 1Position heavy-duty wheel chocks firmly against the vehicle tires on level ground to prevent unexpected rollaway.
- 2Shut down the vehicle engine and push the cab dash parking control valve inward to release the spring brakes.
- 3Don protective work gloves and position yourself safely beneath the chassis at the target foundation brake assembly.
- 4Grasp the slack adjuster firmly and pull hard by hand to draw the pushrod outward to its full manual travel limit.
- 5Measure the linear displacement distance traveled by the pushrod to verify it does not exceed the one-inch safety threshold.
Cevap
The proper sequence starts with securing the vehicle using wheel chocks, releasing the cab parking brake control valve, positioning beneath the foundation brake assembly, manually pulling the slack adjuster to full stroke, and measuring the resulting pushrod travel distance against the one-inch maximum threshold.
Measuring manual slack adjuster free play requires an unloaded foundation brake mechanism. The vehicle must first be stabilized against movement with wheel chocks, after which the spring parking brakes can be safely disengaged. Once disengaged, the inspector can get underneath the chassis, pull the slack adjuster firmly by hand, and measure the linear pushrod displacement to ensure it remains at or under the 1-inch maximum allowable tolerance.
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Anahtar Kavram
Manual slack adjuster pushrod free play inspection protocol and safety prerequisites
Tahmini Süre:1m 30s