323‑9140 Wiring Harness Assembly — Engine Speed Sensor Control Harness

The 323‑9140 Wiring Harness Assembly is a precision‑made electrical wiring part used to transmit speed and timing signals from the engine speed sensor to the ECM (Electronic Control Module). Designed exclusively for Caterpillar C9 ACERT Tier 3 engines, it ensures accurate real‑time signal transmission for fuel injection control and engine timing under severe construction‑site working conditions.

1. Technical Specifications

2. Machine Compatibility

This engine sensor harness fits a wide range of CAT construction machinery equipped with C9 ACERT engines:

• Excavators: 330D, 330D L, 330D FM, 330D MH, 336D, 336D L, 336D LN, 336D2 L, 340D2 L

• Dozers: D6R, D6R II, D6R III, D6T, D7R, D7R LGP, D7R XR

• Motor Graders: 12M, 14, 140M, 140M 2, 150, 160, 160M

• Forestry & Loading Equipment: 521B, 522B, 541, 552 Series 2, 973D Track Loader

• Compactors & Wheel Dozers: 814F II, 815F II, 816F II

3. Key Features & Advantages

• High‑Temperature & Fluid‑Resistant Insulation: Special wire insulation withstands high engine‑bay temperatures and resists erosion from engine oil and hydraulic fluids.

• Stable Anti‑Interference Signal: Optimized shielding structure blocks electromagnetic interference, ensuring precise speed‑sensor signal transmission for stable engine operation.

• Direct OEM‑Standard Plug‑and‑Play: Exact wire length and pin‑out match the original part, enabling quick on‑site replacement without modification.

• Wear‑Resistant Protective Braiding: Heavy‑duty outer loom prevents wire chafing caused by long‑term friction against metal engine components.

For bulk wholesale, technical consultation and engine‑electrical‑component sourcing solutions:

Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981
Email: [email protected]