Description
Product Overview
The 228 plunger assembly is the core pressure-bearing component inside the high-pressure fuel pump. It is composed of a ceramic plunger rod and a stepped steel sleeve. The fuel pressure is established through the reciprocating sliding motion of the rod. Over time, the metal plunger is prone to wear, resulting in an increased gap and oil pressure leakage. This split assembly can replace the internal core components at once, resolving the problem of pressure attenuation in the fuel pump, and is suitable for deep maintenance of various common rail fuel pumps.
Unique Core Features of the Individual Product
Pure white ceramic plunger rod, self-lubricating and with extremely low wear
The plunger rod is made of ceramic material and is integrally fired. Its surface is smooth and has a lubricating property. The friction loss during the reciprocating sliding motion between the rod and the steel sleeve is much lower than that of ordinary steel. Diesel impurities are less likely to cause scratches, and the gap will not expand rapidly over time.
Graded segmented steel sleeve, distributing pressure impact
The sleeve is designed with two upper and lower stepped outer diameters. It distributes the high-pressure fuel impact in segments. The large-diameter base accepts the main oil pressure, while the upper section with a smaller diameter cooperates with the plunger for precise pressure control, and is less likely to cause deformation of the sleeve or loss of the inner wall roundness.
Independent ring-shaped sealing gasket, isolating high-pressure leakage
The steel sleeve slot is pre-installed with an oil-resistant sealing ring that is compatible with high temperatures. After assembly, it fills the gap between the sleeve and the pump body, blocking the leakage of high-pressure fuel outward. It is resistant to high temperatures and diesel corrosion, and is unlikely to harden or shrink under long-term high-temperature conditions.
Split assembly design, no need to match individual accessories separately
The ceramic rod, steel sleeve, and sealing gasket are fully equipped. There is no need to separately purchase and match small parts. During maintenance, the entire set can be replaced simultaneously, eliminating the need to repeatedly check the dimensions of the accessories, significantly reducing the time for disassembling and repairing the fuel pump.
High-precision mirror surface inner hole, maintaining stable oil pressure without attenuation
The interior of the steel sleeve is treated with mirror surface grinding, and the inner wall has no burrs or scratches. The oil pressure leakage is small during the reciprocating motion of the plunger. Even under high-load operation of the equipment, it can maintain a constant fuel supply pressure, reducing the phenomenon of power fluctuation.
Applicable scenarios
It is compatible with the internal structure of the corresponding common rail high-pressure fuel pump. It is mainly used for the maintenance of diesel power oil pumps in freight vehicles, small and medium-sized engineering equipment, and agricultural machinery. It is suitable for deep disassembly and maintenance in repair shops, as well as batch oil pump refurbishment and replacement for fleets.
Product basic parameters
Product name: 228 Split-type High-pressure Pump Piston Assembly
Part number: 228
Main material: Precision ceramic piston rod, hardened alloy stepped steel sleeve, oil-resistant rubber sealing ring
Structural features: Split assembly, ceramic sliding rod, two-stage stepped sleeve, slot sealing structure
Application conditions: Road transportation, short-distance heavy-load construction sites, diesel fuel supply systems with alternating high and low temperatures
Product status: New complete set of components, completed sliding sealing performance and pressure testing
Packaging: Independent and separated protective packaging. The ceramic rod is separately protected from磕碰 and cracking， suitable for cross-border small package logistics
