C7 / C9 / C-9 Plunger Assembly For CAT Injector | Premium Quality Replacement By Abosede Diesel

High-precision Plunger Assembly for CAT C7, C9, and C-9 injectors. Durable, leak-free, and CNC-machined. Supplied by Abosede Diesel. Fast shipping.

 

 

The Plunger Assembly, also referred to as the Slide Valve, is the core control unit inside the CAT HEUI or EUI injectors. It governs fuel pressurization and injection timing by controlling the opening and closing of fuel delivery ports with micron-level accuracy.

At Abosede Diesel, we offer precision-manufactured Plunger Assemblies for a full range of Caterpillar C7, C9, and C-9 fuel injectors, engineered for perfect fitment and long-lasting performance under extreme conditions.

 

 

• Regulates Injection Pressure: Maintains high-pressure fuel flow and injection duration for optimum combustion efficiency.
• Controls Spray Timing: Coordinates fuel injection based on ECU or hydraulic signal input.
• Ensures Seal Integrity: Prevents internal fuel leakage between plunger and barrel through ultra-tight tolerances.

 

 

Each Plunger Assembly (C7-017) consists of 4 precision-engineered parts:

Note: All components are matched in pairs and not sold individually to guarantee sealing performance and longevity.

 

 

Engine	System Type	Typical Injector Models	Matching Plunger Assemblies
C7	HEUI	10R-7671, 10R-7673, etc.	Standard-size plunger with spring-type actuation
C9	HEUI / EUI	10R-7672, 10R-7675	Similar size to C7, higher pressure rating
C-9	EUI	10R-7676, 10R-7938	Larger plunger, no internal spring, higher precision

 

 

Feature	C7	C9	C-9
Plunger Size	Medium	Slightly larger	Longest / largest
Return Spring	Yes	Yes	No
System Type	HEUI	HEUI or EUI	EUI only
Application	Trucks, buses	Medium-duty equipment	Heavy-duty CAT 330D/336D etc.
Pressure Tolerance	~25,000 psi	~26,000 psi	Up to 30,000 psi

All versions are designed for precise control, minimal friction, and zero internal leakage-the foundation of injector efficiency and reliability.

 

 

At Abosede Diesel, we specialize in diesel fuel system components including high-precision injectors, nozzles, plungers, and repair kits. Our plunger assemblies are:

🛠️ CNC-machined to OEM specifications

🔍 100% inspection-tested for leakproof precision

🧪 Heat-treated and surface-polished to withstand extreme working conditions

📦 Individually packaged with anti-rust treatment for storage and transport

With over 20 years of experience, our components are trusted by repair workshops, resellers, and fleet operators worldwide.

 

 

• Package includes: Complete 4-piece plunger assembly set
• Condition: Brand new, premium aftermarket
• Shipping: Worldwide express available
• Warranty: 6 months from date of delivery

 

 

C7 injector models:

238-8091	387-9429	263-8218	328-2585	20R-8067
241-3238	241-3400	268-1835	20R-8067	20R-9079
241-3239	295-1410	268-1836	20R-8067	10R-4761
243-4502	328-2582	268-1839	328-2586	10R-4762
295-1408	20R-8058	268-1840	387-9426	10R-4763
387-9430	20R-8058	20R-8059	387-9427	10R-4764
20R-8057	20R-8058	268-9577	387-9430	10R-7225
20R-8057	20R-8059	295-1411	387-9441	20R-8056
20R-8057	20R-8059	295-1412	557-7627	20R-8066
243-4503	20R-8059	295-9166	20R-8071	20R-9079
295-1409	387-9428	328-2587	20R-8071

C9 injector models:

235-5261	266-4446	387-9432	387-9437	10R-4844
236-0957	267-3360	293-4074	387-9438	20R-8846
238-8092	267-3361	328-2574	387-9439	10R-7221
242-0857	267-9710	20R-8065	553-2592	10R-7222
245-3516	267-9717	20R-8065	557-7634	10R-7223
387-9438	267-9722	20R-8065	20R-8068	11R-1582
10R-9002	293-4071	328-2573	20R-8062	20R-1917
20R-8060	387-9434	328-2580	20R-8061	20R-8064
20R-8060	20R-8063	387-9431	557-7637	20R-8968
254-4330	20R-8063	387-9432	573-4231	20R-9433
254-4339	293-4072	387-9433	577-7633	20R-8065
254-4340	293-4073	387-9434	10R-2828	10R-4764
265-8106	328-2576	387-9436

C-9 injector models:

235-9649	235-9649	235-9649	235-9649	235-9649
236-0962	236-0962

 

 

 

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