Terex 2566C, 2766C, 3066C Articulated Dumptruck Service Manual

This comprehensive Terex Articulated Dumptruck service manual covers the 2566C, 2766C, and 3066C models. Includes detailed diagnostics, repair procedures, and part numbers.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Terex Models Covered & Key Technical Specifications

Models: Terex 2566C, Terex 2766C, Terex 3066C
Sub-models / Variants: 6WG 260 Transmission
Trade Names: Articulated Dumptruck
Build Years: 1994–1998
Technical Data:

  • Engine (2566C/2766C): Cummins 6CTA8.3-C, 6-cylinder, 8.3L, 190 kW (255 HP)
  • Engine (3066C): Cummins MTA11-C300, 6-cylinder, 10.8L, 224 kW (300 HP)
  • Transmission: ZF 6WG 200 Powershift, ZF 6WG 250 Automatic, or ZF 6WG 260 Automatic
  • Fuel Capacity: 245 liters (standard), 300 liters (high-capacity option)
  • Hydraulic System: 200 liters capacity, 172 bar (2500 lbf/in²) system pressure
  • Air System: 7 bar (110 lbf/in²) operating pressure
  • Axle Load (Max): 47,555 kg gross vehicle weight (3066C)
Technical Specifications
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Document Number / Seller:
31573 / Steven Jones
File Size:
8.03 MB
File Type:
ZIP
Language:
English
Pages:
59
Printable:
Yes
Category:
Dump-Truck
Last updated / verified
Dec 19, 2025

Terex Manual Features & Content Preview

Terex 2566C, 2766C, and 3066C Service Coverage

  • Covers 1994–1998 Terex 2566C, 2766C, and 3066C Articulated Dumptrucks with ZF Powershift and Automatic transmission configurations
  • Official Terex Equipment Limited publication SM 991 Rev 2, May 1998
  • Contains 46 exploded-view component diagrams and 12 technical torque specification tables for powertrain and chassis maintenance
  • Downloads to your account within seconds of checkout
  • Indexed PDF search covers every chapter and appendix
  • Laid out for standard letter and A4 printing
  • This 1998 revision provides the standardized service reference for all C-series dump trucks, including the heavy-duty 3066C model with 6WG 260 transmission updates

Chassis and Powertrain Documentation

This factory manual details the service requirements for the articulated chassis, including articulation and oscillation pivot assemblies, hood/cowl mounting, and fender systems. The document provides structural data for main frame beams and articulation pivot maintenance, including straightening and welding guidelines. Electrical and steering systems are documented alongside specialized hydraulic circuit schematics for the hoist and brake systems. The publication also contains diagnostic charts for identifying noise and vibration sources within the driveshaft and articulation points, allowing technicians to isolate component wear effectively.

Engine and Transmission Technical Data

Technical specifications provided include engine cooling, fuel, and lubrication system capacities, alongside detailed torque requirements for engine mounting brackets and transmission housing hardware. The engine section features maintenance schedules for the Cummins 6CTA8.3-C and MTA11-C300, covering oil and filter intervals, belt tension adjustments, and cold/hot engine check procedures. Transmission data provides operational thresholds for the ZF 6WG series, including clutch pack solenoid mapping, pressure testing schedules, and turbine speed sensor reference values. Learn more about what an OEM service publication covers in our technical knowledge base.

Note: This document contains essential safety warnings regarding high-pressure hydraulic components and potential hazardous materials found in fluoro-elastomer seals, which require specialized handling to prevent skin contact and tissue damage during equipment inspections.

Manual FAQ, Purchase & Download Details

What service capacity and fluid volume tables are found in the general information sections? keyboard_arrow_down

General information sections for each model contain comprehensive tables detailing fuel tank, hydraulic system, engine crankcase, transmission, differential, and planetary gear oil capacities. These reference tables provide the necessary volume data for each articulated dumptruck configuration.

Is there a reference chart for standard bolt and nut torque specifications? keyboard_arrow_down

Yes, Section 59 includes a dedicated miscellaneous reference listing standard bolt and nut torque specifications, as well as specific axle bolt and nut torque data.

Are wiring schematics, connector pinouts, and sensor switch references included in the electrical system documentation? keyboard_arrow_down

Manual contains specific sections for the electrical system that include circuit diagrams, switch, and sensor references for the 2566C, 2766C, and 3066C models. These diagrams provide an overview of the electrical layout and system components.

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