2001 Komatsu PC300-7, PC300LC-7, PC350-7 & PC350LC-7 Excavator Shop Manual: Structure, Function & Maintenance Standards (P/N SEBM025800)

The November 2001 edition of Komatsu shop manual SEBM025800 covers the PC300-7, PC300LC-7, PC350-7, and PC350LC-7 excavators within the serial ranges listed above. Its main coverage is machine structure, system function, and maintenance standards.

Text search and diagram detail: Body text and tables are searchable; many labels within diagrams are not. The bookmark panel offers no useful chapter navigation. Small labels in the embedded control schematics require zooming.

• Hydraulic pump and CLSS: HPV125+125 pump structure, LS/PC valve operation, EPC control characteristics, and pressure-compensated flow distribution.

• Travel and swing: HMV160ADT-2 travel motor, KMF230ABE-5 swing motor, brake operation, center swivel joint, and final-drive inspection standards.

• Undercarriage and work equipment: Track roller, idler, recoil spring, track-link, hydraulic-cylinder, and boom/arm/bucket pin-and-bushing inspection limits.

• Engine and electrical controls: SAA6D114E specifications, governor-motor operation, controller pinouts, sensor data, and engine/pump control diagrams.

• Monitor procedures: Multi monitor and 7-segment monitor systems, maintenance resets, user/service-code display, LCD checks, and attachment-flow selection.

• Workshop reference: Push-pull coupler disconnection and connection procedures, hoisting guidance, tightening-torque tables, fluid capacities, and coating-material specifications.

Written for service personnel, this manual is suited to technicians who already work with hydraulic controls and component inspection.

Edition Coverage and Engine Reference

This factory publication breaks down the chassis and general systems for the PC300-7 and PC350-7 series excavators. Sections 20 and 30 are not included: the contents page identifies Testing and Adjusting and Disassembly and Assembly as future releases.

Internal SAA6D114E engine repair requires the separate 114 Series Engine Shop Manual referenced on the cover. This file supplies engine specifications and illustrations of the wet damper, engine mounts, radiator, oil cooler, and aftercooler.

Air conditioner coverage is limited to a piping and component layout.

CLSS Hydraulics, Travel and Swing

The Closed Center Load Sensing System (CLSS) section explains how pump displacement and pressure compensation respond to load. Pump performance curves relate discharge to LS-EPC and PC-EPC command currents.

Travel-brake circuit diagrams explain downhill speed control and braking. Swing-motor section views cover the holding brake and reverse-prevention valve, while the attachment circuit selector valve description distinguishes breaker return-to-tank routing from the circuit used by other attachments.

The Hydraulic Equipment Layout Drawing and control-valve section views identify ports and component locations, including the boom hydraulic drift prevention valve.

Monitor Variants and Electrical Reference

The multi monitor version has L mode, Mi travel speed, and attachment-flow adjustment functions that are not shared by the 7-segment configuration. These distinctions help match the documented controls to the installed monitor before interpreting a missing mode or function as a fault.

Controller and monitor pinout tables, wire-code classifications, and the Total System Diagram support signal tracing. The monitor pages explain access to user, service, and failure codes, but the dedicated troubleshooting charts are not included.

Section 90 contains only its contents page and a blank page; the listed standalone hydraulic circuit diagram and four-part electrical circuit diagram are absent.

The engine-control notes warn that prolonged emergency energizing can burn out the engine-stop solenoid.

Inspection Limits and Workshop Data

This manual supplies standard tightening torque tables covering metric bolts, flared nuts, split flange bolts, and O-ring boss piping joints. It also gives dimensional specifications, component weights, and fluid capacities.

Inspection tables pair standard dimensions and wear limits with remedies for final-drive gears, swing machinery, undercarriage parts, and work-equipment joints. Track roller diameters, recoil spring installation loads, and pin-and-bushing clearances help assess component condition before choosing a repair.

Coupler-handling procedures and hoisting instructions are included. Always consult the safety guidelines for stored hydraulic pressure and heavy lifting before hydraulic repair work.

PDF Contents and Page Count

One printable, English-language 240-page PDF contains 22 preliminary pages, 12 pages of General, 204 pages of Structure, Function and Maintenance Standard, and two pages at the start of Others. The total includes the cover, all contents pages, and 12 blank or revision-mark-only pages; there are no separate supplements.