This is a rocker arm assembly for the HOWO 8×4 heavy-duty truck (Sinotruk HOWO 8×4 model).

Detailed Analysis:

1. Product Positioning & Application

• Applicable Models: Specifically designed for the Sinotruk HOWO 8×4 (front four rear eight) heavy-duty truck. It is used in the valve train of its diesel engine (such as Weichai WP series, Sinotruk MC series, SFH Cursor series, etc.), or in some chassis steering/suspension systems (e.g., steering rocker arm, suspension control arm).

• Function (Chassis System – Steering/Suspension): If it is a steering rocker arm, it transmits steering force to achieve wheel turning. In suspension applications, it connects the axle to the frame, cushions road impacts, and ensures vehicle driving stability.

2. Appearance & Structural Features

• Some rocker arm shafts and bushings are made of copper alloy (e.g., tin bronze) or powder metallurgy to reduce friction coefficient and improve wear resistance.

• The white label on the rocker arm in the image typically indicates part number, batch number, and compatible vehicle model (e.g., “Dedicated for HOWO 8×4”), facilitating production traceability and aftermarket matching.