What This Hose Does
This is a flexible coolant and water transfer hose, 0.875 inch inside diameter and roughly 3 inches long. It bridges two cooling-system connection points where a rigid tube will not work, usually in a tight spot with little room to swing a wrench. Short length, reinforced rubber or silicone construction, rated for engine coolant temperatures.
On the NT855 and N14 these short jumper hoses live in hot, oily, vibration-heavy real estate. They spend their life under constant thermal cycling and pressure from the cooling system, and they get soaked in whatever leaks past above them. That is why they harden, glaze, and split long before the main radiator hoses need attention.
Failure usually shows up as a slow weep at the clamp rather than a blowout. You get a crusty coolant trail, a low overflow bottle nobody can explain, and a sweet smell after shutdown. Squeeze the hose cold. If it feels rock hard, or crackles, or leaves a dent when you let go, it is done.
Why These Numbers Cross
3065060 supersedes and interchanges with Cummins 3040733, 3035174, and 3820663. These are all the same short coolant transfer hose in the same family, carried under different numbers as the engine line moved through revisions and as packaging and supersession changed on the parts side over the years.
The reason they cross is dimensional. All of them are built to the same 7/8 inch inside diameter and the same short cut length, so they seat on the same nipples and clamp with the same band. When the connection geometry does not change, the hose does not need to change either, even if the number on the bag does.
Treat the cross-reference as a starting point, not a guarantee. Numbers move around, and a truck that has been through a few rebuilds may not match what the build sheet says. Confirm against the number stamped or tagged on the hose you are pulling off, or verify by engine serial number before you order.
Checks Before You Order
Measure the old hose. You want inside diameter at the ends and overall length end to end, not stretched. If your existing piece is not 7/8 inch ID or is substantially longer than 3 inches, you are looking at a different hose in the same system and this number is not the one you want.
Look at the nipples while the hose is off. Pitting, scale, or a lip of corrosion under where the clamp sat will chew a new hose in short order. Clean them back to bare metal. Replace the clamps too, worm gear bands lose tension after a few heat cycles and a tired clamp will make a good hose leak.
3065060 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 3065060. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cummins | 3040733, 3035174, 3820663 |
Frequently asked questions
Will 3065060 replace 3040733 on an N14?
3040733 is listed as an interchange for 3065060, and both are the same short 7/8 inch ID coolant transfer hose. Cross-reference is identification only, though. Verify by measuring the hose you removed or by checking your engine serial number before you commit to the order.
How do I know if this hose is the leak source?
Pressure test the cooling system cold and watch the short jumper hoses first. A weep at the clamp band, a white or green crust on the outside, or a soft spongy section under thumb pressure all point to the hose. Also check for a bulge near either end, which means the reinforcement has let go.
Are silicone and rubber interchangeable here?
This part is supplied as reinforced rubber or silicone construction rated for engine coolant temperatures. Both handle the service. What matters more is that the inside diameter matches the nipple and that the clamps are seated on the reinforced section, not out past the end of it.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
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Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.