Frequently Asked Questions About International RH Fuel Tank Senders

Will these fuel tank senders fit my specific International truck model and year?

Our International RH fuel tank senders are designed to fit most International truck models from 1987 through current production years, including ProStar, LoneStar, 9900i, and 9200i series. However, compatibility can vary based on your specific tank configuration and gallonage. We recommend checking your existing sender's mounting pattern (typically 5-hole SAE standard) and tank depth before ordering. If you're unsure, contact us with your VIN and we'll help verify the correct sender for your application.

What's the difference between 0-90 ohm and 240-33 ohm senders, and which one do I need?

The ohm range must match your truck's fuel gauge system. Most International trucks from 2003-present use 0-90 ohm senders, while older models (pre-2003) typically require 240-33 ohm units. Using the wrong ohm range will cause inaccurate fuel readings or gauge malfunction. You can identify your required ohm range by checking the numbers stamped on your original sender or consulting your truck's electrical schematic. When in doubt, test your existing sender with a multimeter at empty and full positions.

How difficult is the installation, and what tools will I need?

Installation typically takes 1-2 hours and requires basic hand tools: a socket set, screwdrivers, and potentially a sender wrench or large channel locks. The main challenges include safely draining or transferring fuel, accessing tight mounting spaces, and ensuring proper gasket seal. You'll need to disconnect the battery, remove the old sender carefully to avoid damaging the tank, and calibrate the new sender arm to match your tank depth. Many customers recommend having a helper to support the sender while aligning mounting holes.

Why is my new sender giving incorrect readings, and how do I fix it?

The most common cause of incorrect readings is improper float arm adjustment. The sender arm must be bent to the correct angle for your specific tank depth - too long and it'll bottom out, too short and you'll never read full. Measure from the mounting flange to your tank bottom and adjust accordingly. Other issues include reversed wiring connections (swap the two wire leads), poor ground connection, or incompatible ohm range. Some senders require manual calibration through your truck's ECM programming.

What's included with the sender, and will I need additional parts?

Most International RH fuel tank senders include the sender unit with float, mounting gasket, and basic instructions. However, you may need to purchase separately: new mounting bolts if yours are corroded, fuel-resistant thread sealant, and potentially a new wiring pigtail if your connector is damaged. Some installations benefit from upgrading to a thicker gasket or adding fuel-resistant RTV sealant for older tanks with irregular mounting surfaces. Always inspect your tank's sender opening for damage or corrosion before installation.