Match the mounting type and arm length to your International DT466 truck, then confirm spline compatibility. Look for a wiper arm that fits standard heavy‑duty truck patterns and is offered by trusted brands such as Bosch, Valeo, or Denso. Compare the original arm’s profile and ensure the length and sweep won’t hit the hood or interfere with blades. If in doubt, consult a parts diagram for International trucks or a reputable aftermarket supplier.

The most complex attribute is the mounting/spline compatibility between the arm and your vehicle. Identify whether your DT466 uses hook, pin, or side‑mount style and verify the spline count and pattern. Measure the arm length and ensure it matches the original or the desired sweep on your windshield. Choose a compatible option from brands that specify heavy‑duty compatibility with International trucks.

For fleet operation, prioritize uniform parts across vehicles for quick swaps and easier maintenance. For personal use, weigh cost, availability, and the ease of finding replacements. In both cases, ensure the arm is compatible with your International DT466’s wiper system and weather conditions.

Mount the arm according to the service manual and confirm the parking position aligns with the blade. Tighten fittings securely but avoid overtightening that can strip splines, and replace any bent or rusty parts. Regularly inspect for free movement, unusual noise, or blade misalignment, and replace in a matching brand family.

If the arm sticks, wobbles, or does not park correctly, replace it. Check for bent or cracked arms, worn splines, or a loose mounting nut. Also verify blade contact and ensure the arm moves freely without hitting the blades or windshield.