. Core Function & Purpose
The connecting rod bushing (also known as the piston pin bushing or small-end bush) is installed between the connecting rod small end and the piston pin. Its core functions are:
Friction Reduction & Load Bearing: Provides a smooth bearing surface between the connecting rod and piston pin, withstanding the tremendous alternating loads and impacts from combustion pressure and piston reciprocating motion.
Precise Alignment: Ensures accurate fit and relative motion between the piston pin and connecting rod.
Lubrication: The inner surface of the bushing features oil grooves or holes for storing and distributing engine oil, forming a stable lubricating film to achieve fluid friction and minimize direct metal-to-metal contact and wear.
Protection of Core Components: Serves as a replaceable wear part, protecting the more expensive connecting rod and piston pin from damage. When the bushing wears out, only the bushing needs replacement, not the entire connecting rod.
2. Applicable Models
This part number 04220157 is primarily designed for:
The DEUTZ BFM1015 series water-cooled diesel engines.
It is generally also compatible with series or derivative models based on the BFM1015 platform (specific confirmation should be made using the official DEUTZ EPC parts catalog or technical manual).
Common Applications: This engine is widely used in construction machinery, generator sets, agricultural machinery, marine auxiliary engines, heavy-duty vehicles, and other fields.
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