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Jelinek P42 Piston Assembly U815 Bosch P-Type Fuel Injection Pump Piston Assembly Core Component for Diesel Engine Fuel Injection System
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| Piston Diameter | 42 millimeters |
| Piston Type | Type P (Bosch Standard Inline Pump Plunger) |
| Manufacturing Material | High-alloy tool steel (such as CrWMn / 9SiCr, etc.), surface nitriding/hard chrome/DLC plating optional |
| Surface Hardness | ≥ HRC 60 (ground surface) |
| Fitting Clearance | 0.0015 - 0.0035 mm (Standard Bosch tolerance band) |
| Working Pressure | ≥ 1200 bar (depending on pump model) |
| Applicable Fuel | Diesel / B20 and Below Biodiesel |
| Warranty Mileage/Hours | Replace according to the manufacturer's maintenance schedule |
Manufacturer No.
JELINEK P42U815
OEM Part No.
Bosch P42 Element
Engine Part No.
Universal High-Speed DieselUniversal Low-Speed Industrial Diesel
Interchange No.
U815P42 PlungerDiesel Pump Element P42
Fitment Vehicles
Bosch P-type Inline Fuel Pump Compatible ModelsConstruction Equipment Diesel EngineGenerator Set Diesel EngineCommercial Vehicle Diesel Engine
Fuel System - Industrial Encyclopedia
Supply Jelinek Jelinek P42 Piston Assembly, Order Number U815, strictly manufactured to Bosch P-Type Fuel Injection Pump standards. Compatible with a wide range of high-speed/low-speed diesel engines, made of high-alloy tool steel, precision ground and surface hardened, ensuring high sealing and wear resistance. It is an ideal replacement part for the fuel system maintenance of construction machinery, power generation equipment, and commercial vehicles.