6-Pack Fuel Injectors for Cat 3114/3116, D5M/D6M & 320B/322C – 127-8216 / 127-8222
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Applications are grouped below. Equipment can vary by serial number, engine, and production configuration.
| Caterpillar Engines | 3114; 3116 |
| Caterpillar Dozers | Selected D5M and D6M configurations |
| Caterpillar Excavators | Selected 320B, 322B/322C and related 3114/3116-powered machines |
Product Overview
A worn or damaged injector can contribute to hard starting, uneven combustion, smoke, loss of power, fuel knock, or a dead cylinder. Injector condition should be considered alongside compression, fuel pressure, pump timing, and the rest of the fuel system.
Cat 3114/3116 mechanical unit injectors appear across excavators, dozers, loaders and compactors. The 127-8216 number is cataloged as an 8 mm plunger injector, while 127-8222 appears in related 3114/3116 application listings; engine arrangement and injector number should be matched as a set.
Key Features & Performance
- Metered fuel delivery: Designed for the matching diesel injection system and engine family.
- Cylinder-level service: Allows the failed injector or injector set to be replaced when testing identifies a fueling problem.
- Reference-number matching: Injector families can look similar, so the stamped/OE number and engine arrangement are important fitment checks.
Part Numbers & Specifications
- Part Numbers: 127-8216; 127-8222
- Quantity: 6 injectors
- Injector Family: Mechanical unit injector for 3114/3116 applications
Before You Order
Read the injector number from the original units or engine parts catalog before replacing all six. Do not mix different injector calibrations within the same engine.
Frequently Asked Questions
Is this an OEM part?
This is a replacement service part intended to interchange with the reference number(s) and applications listed here. It is not represented as a factory-branded OEM part unless the product packaging itself states otherwise.
How do I confirm fitment?
Match the original part number first, then confirm the machine model, engine, connector or mounting arrangement, and any serial-number break that applies to your equipment.