Befrag C7-020 Fixed Block For CAT C7 HEUI Injectors – Precision Machined Replacement Part
1. Product: C7 Fixed Block
2. Compatible Equipment: CAT C7 Diesel Engine
3. Model: C7-020
4. Brand: Befrag
5. Condition: Brand New
6. Origin: China
7. Delivery Time:3-5 days
8. Payment Methods:T/T, Western union, PayPal
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Product Introduction
Shop high-quality C7-020 Fixed Block for CAT C7 HEUI fuel injectors. Installs between nozzle body and spool valve block. Ensures precision alignment and stable injector performance.
Product Overview
The C7-020 Fixed Block is a core structural part used in Caterpillar C7 HEUI (Hydraulic Electronic Unit Injector) systems. This component is positioned between the nozzle holder and the upper spool valve block-serving as a rigid central frame that supports and aligns key internal components.
As an integral part of the injector body, the fixed block maintains the correct axial alignment of the plunger, nozzle, and valve assembly. Its role is critical in ensuring consistent fuel atomization, injection timing, and structural stability during high-pressure operation. The C7-020 from Befrag is manufactured with high-strength materials and tight tolerances to meet or exceed OEM standards.
Whether for injector servicing or remanufacturing, replacing a worn or deformed fixed block is essential to restore full injector function.
Installation Position and Function
Installation Position
The C7-020 Fixed Block is located centrally inside the injector body, sandwiched between the lower nozzle section and the upper valve control section. In the exploded diagram, it sits directly below the control valve body (C7-022) and above the mid-body cylinder and nozzle nut assembly.
Function
- Structural Support: Acts as the rigid base that connects and aligns the lower nozzle and upper spool valve components.
- Axial Alignment: Maintains concentricity of the plunger and fuel flow channels, ensuring accurate and repeatable injector firing.
- Pressure Resistance: Withstands extreme hydraulic and mechanical pressures during fuel injection cycles.
- Precision Seating: Provides precise seating surfaces for sealing components and guides to prevent leakage and vibration.

Improper seating or wear of the fixed block can cause fuel delivery errors, misfiring, or internal component damage. That's why quality replacement, like the Befrag C7-020, is crucial for repair quality and engine longevity.
Key Features
- CNC Precision Machined:
Ensures perfect fit and optimal internal clearances.
- Premium Material Composition:
Made from heat-treated alloy steel for high pressure and thermal endurance.
- Corrosion-Resistant Finish:
Coated to resist rust and wear, even in demanding diesel environments.
- OEM-Grade Compatibility:
Matches factory specs for easy drop-in replacement during injector overhaul.
- Cost-Effective Solution:
Dependable and affordable replacement part for workshops and remanufacturers.
Technical Specifications
|
Item Name |
Fixed Block (C7-020) |
|
Manufacturing Brand |
Befrag |
|
Material |
High-strength alloy steel |
|
Surface Treatment |
Corrosion-resistant coating / precision grinding |
|
Application |
Caterpillar C7 HEUI Injectors |
|
Mounting Position |
Between nozzle holder & valve block |
|
Fit Type |
Direct-fit OEM replacement |
Compatible Injector Models
The C7-020 Fixed Block fits the following Caterpillar C7 HEUI injector models:
- Standard & Remanufactured Injectors:
238-8091, 241-3238, 241-3239, 243-4502, 243-4503, 263-8218, 268-1835, 268-1836, 268-1839, 268-1840, 268-9577, 295-1408, 295-1409, 295-1410, 295-1411, 295-1412
- Rebuild & Service Numbers:
20R-8056, 20R-8057, 20R-8058, 20R-8059, 20R-8066, 20R-8067, 20R-8071, 20R-9079
- Upgraded Injector Models:
328-2582, 328-2585, 328-2586, 328-2587, 387-9426, 387-9427, 387-9428, 387-9429, 387-9430, 387-9441, 557-7627
- 10R Series:
10R-4761, 10R-4762, 10R-4763, 10R-4764, 10R-7225
Applications
- Caterpillar C7 diesel engines (on-highway, construction, marine, power generation)
- Medium-duty trucks and buses
- Heavy equipment using C7 HEUI injector technology
Note: Always verify your injector's part number and consult installation diagrams for accurate replacement. For technical assistance or wholesale pricing, please contact Abosede Diesel support.
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