•

✅ Compatibility

  • Make: Caterpillar (CAT)
  • Engines: CAT 3126B, 3126E, C7
  • Common Applications:
    • CAT C7-powered medium-duty trucks, school buses, and coach buses
    • CAT 3126B/3126E marine engines and industrial power units
    • Vehicles and equipment with CAT 3126B, 3126E, or C7 HEUI fuel systems
  • OEM / Cross Reference Part Numbers: 10R-0781, 198-6605, 222-5966, 197-7107, 199-6065, 222-5926, EX630781, 10R0781, 1986605, 1977107, 1996065, 2225966, 2225926, CA2225966, CA10R0781, CA1977107, CA1986605, CA1996065, CA2225926
  • Note: Verify your engine serial number and existing injector part number before ordering. Contact us with your VIN or engine serial for fitment confirmation.

🔧 Product Highlights

  • Direct OEM Replacement: Drop-in fit for CAT 3126B, 3126E, and C7 HEUI (Hydraulically Actuated Electronically Controlled Unit Injector) fuel systems
  • New Aftermarket Quality: Manufactured to CAT OEM specifications for reliable fuel delivery, consistent injection pressure, and long service life
  • Restores Full Engine Performance: Resolves hard starting, rough idle, misfires, excessive smoke, loss of power, and injector fault codes (e.g., CAT ET diagnostic codes)
  • Precision Calibrated Nozzle: Factory-spec spray pattern for optimal combustion efficiency and emissions compliance
  • Broad Application Coverage: Suitable for on-highway trucks, school buses, marine, and industrial CAT 3126/C7 applications

📦 What's Included

  • 1× Fuel Injector (10R-0781 / 198-6605) — New Aftermarket

🔑 Key Specs

  • Part Number: 10R-0781 / 198-6605
  • Cross Reference: 222-5966, 197-7107, 199-6065, 222-5926, EX630781, CA2225966, CA10R0781, CA1977107, CA1986605, CA1996065, CA2225926
  • Injector Type: HEUI (Hydraulically Actuated Electronically Controlled Unit Injector)
  • Compatible Engines: Caterpillar 3126B, 3126E, C7
  • Condition: New Aftermarket
  • SKU: 10R-0781

⚠️ Please verify your engine model and existing injector part number before purchasing. CAT 3126B, 3126E, and C7 engines use HEUI injectors — ensure your system is compatible before ordering.

Fuel Parts Depot

1 Pc Fuel Injector 10R-0781 10R0781 198-6605 1986605 for Caterpillar 3126B 3126E C7 Engine

SKU 10R-0781
$931.00
$931.00

✅ Compatibility

  • Make: Caterpillar (CAT)
  • Engines: CAT 3126B, 3126E, C7
  • Common Applications:
    • CAT C7-powered medium-duty trucks, school buses, and coach buses
    • CAT 3126B/3126E marine engines and industrial power units
    • Vehicles and equipment with CAT 3126B, 3126E, or C7 HEUI fuel systems
  • OEM / Cross Reference Part Numbers: 10R-0781, 198-6605, 222-5966, 197-7107, 199-6065, 222-5926, EX630781, 10R0781, 1986605, 1977107, 1996065, 2225966, 2225926, CA2225966, CA10R0781, CA1977107, CA1986605, CA1996065, CA2225926
  • Note: Verify your engine serial number and existing injector part number before ordering. Contact us with your VIN or engine serial for fitment confirmation.

🔧 Product Highlights

  • Direct OEM Replacement: Drop-in fit for CAT 3126B, 3126E, and C7 HEUI (Hydraulically Actuated Electronically Controlled Unit Injector) fuel systems
  • New Aftermarket Quality: Manufactured to CAT OEM specifications for reliable fuel delivery, consistent injection pressure, and long service life
  • Restores Full Engine Performance: Resolves hard starting, rough idle, misfires, excessive smoke, loss of power, and injector fault codes (e.g., CAT ET diagnostic codes)
  • Precision Calibrated Nozzle: Factory-spec spray pattern for optimal combustion efficiency and emissions compliance
  • Broad Application Coverage: Suitable for on-highway trucks, school buses, marine, and industrial CAT 3126/C7 applications

📦 What's Included

  • 1× Fuel Injector (10R-0781 / 198-6605) — New Aftermarket

🔑 Key Specs

  • Part Number: 10R-0781 / 198-6605
  • Cross Reference: 222-5966, 197-7107, 199-6065, 222-5926, EX630781, CA2225966, CA10R0781, CA1977107, CA1986605, CA1996065, CA2225926
  • Injector Type: HEUI (Hydraulically Actuated Electronically Controlled Unit Injector)
  • Compatible Engines: Caterpillar 3126B, 3126E, C7
  • Condition: New Aftermarket
  • SKU: 10R-0781

⚠️ Please verify your engine model and existing injector part number before purchasing. CAT 3126B, 3126E, and C7 engines use HEUI injectors — ensure your system is compatible before ordering.

We offer 12-month warranty against defects in materials or workmanship.

All parts listed on Fuel Parts Depot are aftermarket replacement parts manufactured by independent suppliers. They are not genuine OEM (Original Equipment Manufacturer) parts and are not made by, affiliated with, or endorsed by the original equipment manufacturers, including but not limited to Perkins, Isuzu, Kubota, Yanmar, Caterpillar (CAT), Cummins, JCB, or any other brand referenced on this site. Brand names and model references are used solely for compatibility identification purposes. Our aftermarket parts are designed and tested to meet or exceed OEM specifications.

    

Fitment Information

Compatibility

Year Make Model Engine
1997-2009 Caterpillar Medium-duty trucks, school buses, coach buses, marine & industrial units with CAT 3126B, 3126E, C7 engine Caterpillar 3126B, 3126E, C7 HEUI Diesel

Part Numbers

10R-0781, 198-6605, 222-5966, 197-7107, 199-6065, 222-5926, EX630781, 10R0781, 1986605, 1977107, 1996065, 2225966, 2225926, CA2225966, CA10R0781, CA1977107, CA1986605, CA1996065, CA2225926

Features

  • New Aftermarket
  • Direct Fit No Modification
  • Consistent Fuel Delivery
  • Ready for Installation

Our Guarantee

12 Month Warranty
30-Day Returns
Fitment Guaranteed

What's Included

1x Fuel Injector 10R-0781 / 198-6605 (New Aftermarket)

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