Kenworth T700 Fuel Tank Senders
Frequently Asked Questions About Kenworth T700 Fuel Tank Senders
Will these fuel tank senders fit my specific Kenworth T700 model year?
Most aftermarket fuel tank senders for the Kenworth T700 are designed to fit models from 2008 through 2019. However, compatibility can vary based on your tank configuration (single vs. dual tank setup) and tank capacity (100-150 gallon tanks are most common). Always verify the sender's ohm range matches your truck's gauge requirements - typically 240-33 ohms for most T700 models. Check your VIN or contact us with your truck's specifics for guaranteed fitment.
What are the most common installation challenges with T700 fuel senders?
The primary installation challenges include accessing the sender unit through the tank's top access panel, which may require removing the bed or working from underneath. You'll need a special lock ring tool for proper removal and installation. Many customers report difficulty with the float arm adjustment - it must be bent correctly to match your tank depth or you'll get inaccurate readings. Plan for 2-3 hours of labor if doing it yourself, and always drain the tank completely before starting.
How do I know if my fuel sender is failing versus other gauge problems?
A failing fuel sender typically shows erratic gauge readings that jump around, stick at certain levels, or read empty when you have fuel. To test, use a multimeter to check resistance at the sender terminals - you should see smooth resistance changes as you move the float arm. If readings are inconsistent or show open/short circuits, the sender needs replacement. Common failure points include corroded terminals, worn resistor strips, or damaged float arms from contaminated fuel.
What's the difference between OEM and aftermarket fuel senders for the T700?
OEM Kenworth senders typically cost $180-250 and guarantee exact fit, but aftermarket options from reputable manufacturers like Dorman or VDO work equally well at $60-120. The main differences are the warranty period (OEM usually offers 2 years vs. 1 year aftermarket) and material quality of the float arm. Many aftermarket senders now use upgraded stainless steel components that actually outlast OEM brass floats in terms of ethanol fuel resistance.
Can I replace just the sending unit or do I need the entire fuel pump assembly?
On most Kenworth T700 models, the fuel sender is a separate component from the fuel pump and can be replaced independently. This is good news since sender-only replacement costs significantly less. However, if your truck has an in-tank fuel pump setup (common on 2015+ models), you may need to remove the entire assembly to access the sender. Check if your sender has a separate 2-wire connector at the tank - if yes, it's likely replaceable on its own.