Deep Dive Analysis: The 2003 Extec S4 Mobile Screening Plant – Specifications & Operational Significance
The early 2000s marked a pivotal era in mobile aggregate processing, driven by demands for increased efficiency on diverse job sites – from quarry faces to urban demolition projects and major infrastructure builds. Amidst this landscape, Extec Screens & Crushers Ltd., renowned for robust and innovative machinery, introduced the Extec S4, primarily designated as a mobile tracked screening plant. While sometimes colloquially referenced within broader equipment categories due to its integration potential with crushers (“Crawler Crusher” being an imprecise but occasionally encountered informal term), its core function remained dedicated high-capacity screening.
This detailed analysis focuses exclusively on reconstructing and interpreting the critical specifications of the 2003 Extec S4 based on historical documentation and operational knowledge relevant to that period. Understanding these specifications provides essential context for evaluating its capabilities within its technological generation.
I. Core Identity & Design Philosophy
Model: Extec S4
Type: Tracked Mobile Screening Plant / Scalping Screen / Double Deck Screen (configurable)
Primary Function: High-volume separation of excavated or crushed materials into defined size fractions directly at the point of extraction or processing.
Design Focus: Robustness for heavy-duty applications (quarrying, mining primary feed), high throughput capacity relative to footprint, operator-friendly maintenance access, rapid setup/teardown times (<30 minutes typical), excellent transport mobility via low-loader trailer.
Target Applications: Primary scalping before crushing circuits; secondary/tertiary sizing after crushing; recycling operations handling C&D waste; topsoil screening; coal preparation; aggregate production lines requiring precise sizing.
Era Context: Represents pre-Sandvik acquisition Extec engineering – characterized by rugged build quality utilizing high-tensile steel components designed explicitly for harsh operating environments demanding reliability above all else.
II. Detailed Specification Breakdown (Circa 2003)
1. Structural & Dimensional Specifications:
Operating Weight: Approximately 31 tonnes (68,300 lbs). This significant weight underscored its heavy-duty construction but necessitated appropriate low-loader trailers rated above 35 tonnes Gross Vehicle Weight (GVW) for highway transport.
Overall Dimensions (Transport Configuration):
Length: ~13 meters (42 ft 8 in)
Width: ~2.9 meters (9 ft 6 in)
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