Product Description

CUMMINS 3928898 OEM P7100 INJECTION PUMP SUPPORT BRACKET – RAM 5.9L 12-VALVE (1994-1998) | CPP DIESEL

CUMMINS 3928898 OEM P7100 INJECTION PUMP SUPPORT BRACKET (FUEL PUMP BRACE) – RAM 5.9L 12-VALVE (1994–1998)

The genuine Cummins 3928898 P7100 Injection Pump Support Bracket is the factory-OEM solution designed to stabilize the mechanical P-pump on 1994-1998 Dodge Ram 5.9L 12-valve engines. This block-to-pump brace anchors the P7100 injection pump firmly to the engine block — helping reduce vibration, prevent mounting ear fatigue, and maintain alignment under heavy load or extended duty cycles. Made from OE-grade steel, this bracket ensures longevity and proper fitment, preserving fuel pump geometry and minimizing risk of pump gear wear or failure.

Fitment & Use

• Direct-fit OEM part for 1994–1998 Dodge Ram 2500 / 3500 5.9L 12-Valve (P7100 mechanical injection pump).
• OEM part number 3928898; required quantity: 1 per engine.
• Pairs with rear support “T-block” bracket Cummins 4003580 when used in a full P-pump support setup.
• Recommended when rebuilding or reinstalling a P7100 pump, or when original bracket shows wear or fatigue. 

Cross Reference / Often Paired With

• Cummins 4003580 OEM P7100 Fuel Pump Brace – Rear Support Bracket (rear “T-block” brace)
• P7100 gear nut & lock washer — e.g. Cummins 3920921 (nut) / Cummins 3920922 (lock washer) — often inspected or replaced when servicing P-pump. 
• Fuel feed/return lines if original ones show wear: e.g. Cummins 3923083 (feed), Cummins 3923171 (return).

Why This Bracket Matters

Without a proper support bracket like this one, the P7100 pump can develop excessive vibration or movement — leading over time to case fatigue, gear misalignment, or premature failure. The 3928898 bracket restores factory-spec support and helps ensure long-term reliability and smooth operation of your fuel system. OEM construction means exact fitment and durability under harsh diesel operating conditions.

FAQ

WILL THIS FIT MY 1994–1998 12-VALVE CUMMINS? Yes — this is the OE P7100 support bracket made for 1994–1998 Dodge Ram 5.9L 12-valve engines equipped with the mechanical P-pump. 

WILL THIS WORK ON COMMON-RAIL (2003+) ENGINES? No — this part is designed specifically for P7100-equipped 12-valve engines. Common-rail ISB or 24-valve engines do not use this bracket configuration.

WHAT DOES THIS BRACKET DO? It braces the P7100 pump to the engine block to reduce vibration and mechanical stress, helping prevent mounting-ear fatigue and gear train misalignment — extending pump life. 

IS THIS A GENUINE CUMMINS PART? Yes — this is the factory-OEM Cummins bracket, part number 3928898. 

DO I NEED ANYTHING ELSE WHEN INSTALLING? It’s recommended to inspect mounting hardware, P-pump gear nut/lock washer, and fuel lines. Replace any worn components for optimal performance. For full support, many users pair this block-side bracket with the rear support bracket 4003580.