Komatsu PC128US-2 / PC138US-2 / PC138USLC-2 Excavator Service Manual (P/N SEBM018417)

Cut down your diagnostic time and stop guessing at specs. Available as an instant download, this 1,028-page digital shop manual delivers the exact OEM data you need to maintain and troubleshoot your Komatsu excavator without waiting for shipping.

• Complete Machine Coverage: Details standard and blade-equipped configurations for 2004 Komatsu PC128US-2, PC138US-2, and PC138USLC-2 models.
• Official Factory Data: OEM publication P/N SEBM018417, packing critical diagnostic metrics across multiple serial-number breaks.

Technical Scope and System Diagnostics

You don't have time for generic info when a machine is down. This official reference cuts out the fluff, breaking down major structural systems with clear functional descriptions, system overviews, and baseline testing procedures. It thoroughly documents hydraulic pump operation, swing machinery, and engine control parameters, alongside specific track frame configurations.

Working on heavy earthmoving equipment involves high-pressure hydraulics and massive structural loads. Always review the designated system parameters and built-in safety protocols, ensuring you relieve system pressure before initiating any pressure tests or component teardowns.

Hard Specifications and Reference Data

Accurate baseline data is everything. The reference sections deliver comprehensive torque tables for metric bolts, flared nuts, and split flanges specific to these serial number breaks. Fluid parameters are strictly defined, confirming a 99-liter hydraulic tank capacity (69-liter refilling volume) and a standard 31.9 MPa hydraulic oil operating pressure. You will also find quick-reference specifications for swing speed, track gauge, and bucket capacities. This ensures your shop has the critical numbers required to baseline the equipment properly and get the machine back in the dirt safely.