294183-0050 Diesel Fuel Feed Pump Cover Plate

🔧 294183-0050 - Feed / Pump Plate for Denso HP3 Common-Rail Systems

The 294183-0050 pump plate (also listed in some catalogs alongside 294183-0030 / 294183-0160) is a compact but mission-critical component in Denso HP3/HP4 fuel delivery assemblies. Installed at the feed/inlet stage of the injection pump, this precision plate controls fuel passage geometry between the low-pressure supply and the high-pressure pumping elements - a small part that has a large effect on flow stability, priming behavior and overall pump reliability.

 

 

Flow metering & priming: The pump plate's orifice and sealing surfaces regulate the feed flow into the pump rotor assembly so the high-pressure stage receives consistent volume each stroke. Proper feed reduces cavitation, pressure spikes and start-up delays. wunfagroup

Wear tolerance: Because it sits in the fuel path, the plate is exposed to particulate and micro-erosion; a new, correctly finished plate restores factory hydraulic characteristics and helps maintain injector timing precision.

 

 

Material: Hardened alloy / stainless grade recommended for high abrasion and corrosion resistance. 

Finish: Micro-polished metering surface and precision CNC bore to OEM tolerances - reduces turbulence and maintains repeatable flow. 

Weight / size (reference): Small, lightweight plate - typical gross weight ~0.3–0.4 kg in packaged kit listings; confirm exact dimensions with supplier datasheet.

 

 

Replace, don't reuse: Pump plates are inexpensive relative to the cost of rework - always fit a new plate during a rebuild to restore OEM flow characteristics. 

Cleanliness: Thoroughly clean housing passages and verify absence of scoring or pitting in mating surfaces before assembly. Contamination is a leading cause of premature wear. 

Bench test after rebuild: Perform feed/return and balance testing on a calibrated test bench to confirm correct flow rates and absence of internal bypass before returning pump to service.

 

 

If you want, we can:

check exact compatibility against your pump serial/engine model,

provide bench test limits and recommended torque/assembly notes, or

supply an OEM or remanufactured kit with seals and installation instructions.

Restore pump performance the right way - replace the feed plate and bring your fuel system back to spec.

 

 

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