TEREX TA25 / TA27 / TA30 Dump Truck 2009 Workshop Maintenance Manual (P/N SM 15503430)

This 770-page OEM maintenance publication (SM 15503430, February 2009 revision) covers the TEREX TA25, TA27, and TA30 Articulated Dump Trucks. Designed for heavy equipment mechanics and workshop technicians, it serves as the primary technical reference for SM889 through SM920 chassis builds.

Heavy machinery maintenance requires strict adherence to factory procedures. Working on articulated dump trucks poses significant crushing and high-pressure fluid hazards. Always review these factory specifications thoroughly and consult certified heavy equipment personnel before initiating any structural or drivetrain repairs to ensure safe workshop practices.

System Coverage and Maintenance Breakdown

Detailing the mechanical configurations for the chassis, this manual provides deep dives into articulation and oscillation pivot assemblies, engine mounting, and hood support structures. It outlines the cooling fan and air cleaner systems with precise data on intake restrictions and required service intervals. You will find extensive coverage of the ZF 6WG 260 and 6WG 310 RPC automatic transmissions. This includes fault code identification, gear shifting mechanics, and electronic control module diagnostics.

Additionally, it maps out the Quantum Electronic Fuel System. Technicians can reference specific diagnostic codes, test points, and the maintenance light monitoring system. For structural work, a dedicated section explains factory-approved welding procedures for frames and alloy steel castings. Maintaining structural integrity during heavy-duty operations is critical. It also features 12 complex schematic diagrams for electrical, hydraulic, and oil circulation systems, plus 10 detailed torque specification tables.

Essential Technical Specifications

Quick access to accurate factory data reduces diagnostic time on the shop floor. For the TA30, the technical data lists a maximum torque of 1775 Nm (1309 lbf ft) at 1400 rev/min. The Cummins QSM11 engine displacement is documented at 10.8 liters across all applicable models.

Fluid servicing is clearly mapped out. The transmission cooling system capacity is strictly specified at 63 liters for the TA25, TA27, and TA30 series units. Drivetrain and steering maintenance specs are equally precise. The front axle differential reduction ratio is 3.875:1 across the model range. When rebuilding or servicing steering components, the torque for the main steering cylinder pin bolts is listed at exactly 73 Nm (54 lbf ft).