Final answer:
To address the steering wander and pull on a three-axle tractor with walking beam suspension, check components like tire pressure, wheel alignment, suspension, steering linkages, and ball joints. Perform tests such as tire pressure measurements, alignment checks, and inspecting for wear or looseness in the steering and suspension systems. Use the tractor manufacturer's guidelines as specifications for these checks.
Step-by-step explanation:
A customer brought in a three-axle tractor with walking beam suspension experiencing steering wander and pull. To diagnose the issue, several components should be inspected, including the suspension system, tire pressure, wheel alignment, steering linkages, and ball joints. Each of these could contribute to the symptoms described.
For tests, a mechanic would likely begin by checking the tire pressure to ensure it is within the correct specifications. They would then proceed to measure the wheel alignment, inspect the steering gear and linkage for wear or looseness, and ensure that the suspension components are not damaged or excessively worn. Additionally, the balance of the tires should be verified.
The specifications used for these checks would depend on the tractor's manufacturer guidelines, which will detail the appropriate pressure settings for the tires, alignment angles, and tolerances for wear on suspension and steering components.