Frequently Asked Questions About Kenworth T600 Fuel Tank Senders

What years and models are these fuel tank senders compatible with?

Our Kenworth T600 fuel tank senders are designed to fit models from 1985 through 2007. They're compatible with both single and dual tank configurations. However, sender arm length varies based on tank capacity (50, 75, 100, or 150-gallon tanks), so you'll need to verify your specific tank size before ordering. The mounting pattern is universal for all T600 models within these years.

How difficult is it to install a replacement fuel sender, and what tools do I need?

Installation typically takes 1-2 hours per sender. You'll need basic hand tools including a socket set, screwdrivers, and a brass drift punch for the lock ring. The most challenging part is removing the old lock ring without damaging the tank. We recommend draining the tank below the sender level, using a proper seal when reinstalling, and having a helper to support the sender while threading the lock ring. Always disconnect the battery before starting to avoid electrical issues.

Why is my fuel gauge reading incorrectly after installing a new sender?

The most common cause is incorrect sender arm length for your tank size or improper float arm adjustment. Before installation, compare the new sender's arm length to your old unit. The float should sit about 1 inch from the tank bottom when empty and shouldn't hit the tank top when full. Also check that you've connected the correct wire terminals - reversed connections will cause erratic readings. Some aftermarket gauges may require resistance matching or calibration.

What's the difference between OEM and aftermarket fuel senders for the T600?

OEM senders use a 0-90 ohm resistance range and feature heavy-duty brass components with reinforced float arms. Aftermarket units vary in quality - premium versions match OEM specs and often include upgraded stainless steel hardware, while economy versions may use lighter materials and less precise resistance tolerances. We carry both options, with aftermarket units typically costing 40-60% less than OEM while still meeting DOT requirements.

How long should a fuel tank sender last, and what are signs it needs replacement?

A quality fuel sender typically lasts 8-12 years depending on fuel quality and usage conditions. Common failure signs include erratic gauge readings, gauge stuck on full or empty, gauge only working in certain fuel level ranges, or intermittent operation. Ethanol-blended fuels can accelerate sender deterioration. If your gauge problems persist after checking wiring and grounds, the sender likely needs replacement. Consider replacing both senders on dual-tank systems to ensure matched readings.