New CAT 1278218 Injector Caterpillar Aftermarket for CAT
- New Injector Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 1278218 Fuel Injector
â–¶Specification for 1278218 Fuel Injector
â–¶Exact Fit Guarantee for 1278218 Fuel Injector
â–¶| Models | 35, 45, 55, 3116, 3126, TK371, TK381, 533, 543, TK370 |
|---|---|
| Dimensions | 2.95x9.25x5.71 |
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I’m grateful I found this company! They answer the phone every time plus the parts are packaged very well!! Even the angriest mailman couldn’t damage your parts! lol The parts showed up as planned and for being aftermarket the quality seems to be good!! The warranty is the same as CAT. Thank you Daniel!!! -
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Frequently Asked Questions
What is the Caterpillar 1278218 injector used for?
The Caterpillar 1278218 injector is a high-quality aftermarket replacement designed to support reliable fuel delivery in Caterpillar 3116 and 3126 engine applications. It is manufactured to meet or exceed OEM specifications for dependable performance and durability in demanding operating conditions.
What are the benefits of the 1278218 injector?
- Helps support accurate fuel delivery and atomization
- Promotes efficient engine performance
- Manufactured from durable materials for long service life
- Designed to meet or exceed OEM specifications
- Suitable for demanding heavy-duty engine applications
Is the 1278218 injector compatible with multiple Caterpillar engines?
Yes, this injector may fit several Caterpillar applications including 3116, 3126, 35, 45, 55, TK370, TK371, and related models depending on the fuel system configuration. If you are still unsure, reach out to Propel Parts, our team will be happy to help you verify if this part fits your equipment.
Why is replacing worn injectors important?
Replacing worn injectors helps maintain proper fuel spray patterns, support efficient combustion, and reduce unnecessary strain on engine components.
Does the 1278218 injector meet OEM standards?
Yes, this aftermarket replacement is designed to meet or exceed OEM specifications for fit, fuel delivery performance, and dependable durability.
Can a damaged injector affect engine performance?
Yes. A worn or damaged injector may contribute to poor fuel atomization, rough engine operation, reduced fuel efficiency, and increased emissions.
Are related Caterpillar fuel system components available from Propel Parts?
Yes. Propel Parts carries a variety of replacement fuel system parts for Caterpillar equipment. You can also check the Caterpillar 3400 Nozzle 7N9843 for another related fuel system replacement option.
This 1278218 Fuel Injector is compatible with the following models:
35, 45, 55, 3116, 3126, TK371, TK381, 533, 543, TK370 & more...

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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