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Upkeep and maintenance of steering gears

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With the continued integration of more technologies into automated commercial vehicle safety systems, steering gear maintenance is an often neglected, yet key element in the effective operation of advanced driver assistance systems (ADAS).

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The most common steering gear location is on the steer axle’s left-side frame rail, although vehicles with large front axle ratings—such as vocational or high-load applications—may have two gears, one mounted on each side. Regular visual inspection should include the steering reservoir and fluid level, plus checking hoses for weathering or cracks and keeping an eye out for fluid leaks.

“You’ll also want to ensure that bolts are securely torqued across the system—the Pitman arms, drag links, even the tie rods,” said Mike Bolen, Bendix product manager for reman steering. “Check those connections to make sure nothing is loose. And it’s important to know the recommended steering fluid life, as well as the replacement schedule for the filters on the system that protect the steering gear by keeping the fluid clean.”

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Another important observable factor is one key difference between the two most popular steering gears in North America: the presence of an external grease fitting on the output shaft. Technicians need to be able to recognize the difference and understand if it’s a “lube-for-life” gear or one requiring manual grease application.

Additionally, never use a high-pressure wash to clean the steering gear, as this can compromise the seals and create leak paths. 

This Tech Tip was contributed by Bendix.

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