2002 Komatsu PC27MRx-1 / PC30MRx-1 / PC35MRx-1 Excavator Operation & Maintenance Manual (P/N SEAM035305T)

This Komatsu Operation & Maintenance Manual, Form No. SEAM035305T, covers the PC27MRx-1, PC30MRx-1, and PC35MRx-1 hydraulic excavators in canopy and cab configurations. The June 2002 publication covers daily operation, scheduled maintenance, wear-part replacement, and initial checks before repair.

Bookmarks, search, and illustration detail: Embedded PDF bookmarks provide navigation to chapters and individual maintenance topics. Text search works on the cover but is unreliable throughout the main text. Small labels in the battery-connection illustration are readable when enlarged.

• Engine and fuel service: Oil and filter replacement, water-separator cleaning, feed-pump pre-filter replacement, fuel-system air bleeding, and cooling-system cleaning.

• Undercarriage: Separate track-tension checks for rubber shoes and steel shoes or road liners, rubber-shoe removal and installation, and wear assessments.

• Hydraulic maintenance: Filter replacement, tank and strainer service, piston-pump air bleeding, and attachment-circuit connection and bleeding procedures.

• Electrical troubleshooting: Symptom tables, monitor indications, fuse capacities and circuit names, battery removal and installation, and booster-cable connection illustrations.

• Work equipment and controls: Bucket and tooth replacement, boom-swing and blade operation, plus ISO/J/D control-pattern changes on machines equipped with the pattern change valve.

• Attachments and cab equipment: Hydraulic breaker operation and maintenance guidance, bucket compatibility tables, air-conditioner compressor-belt adjustment, and condenser and air-filter cleaning.

This manual is intended for trained, authorized operators and maintenance personnel working on these excavators.

Operations and Equipment Documentation

Daily inspections, starting and warm-up procedures, travel on slopes, transportation, and storage are covered alongside the machine controls. The monitoring section explains engine oil pressure, charge level, and coolant-temperature indications.

The Machine View Illustrations identify major components and controls, while Location of Safety Labels shows where the machine's warning labels belong.

Cab-specific coverage includes slide-door rail and roller lubrication, windshield handling, and R134a refrigerant sight-glass checks. Refrigerant charging is referred to a specialist.

Engine and Hydraulic Maintenance

The specification tables identify the PC27MRx-1's 3D82AE-3H engine, the PC30MRx-1's 3D84E-3K, and the PC35MRx-1's 3D84E-3L.

Hydraulic-filter differences: A separate PC35MRx procedure addresses its spring-loaded cover, valve, and filter element. This distinction helps you select the correct service procedure before opening the assembly.

The air-bleeding sections warn that an unfilled pump case can damage the piston pump and that trapped cylinder air can damage piston packing. These cautions accompany the relevant procedures.

Service references: The Maintenance Schedule Chart and breaker-use graph distinguish routine maintenance from the more frequent hydraulic oil and filter changes associated with breaker operation. Fluid tables distinguish total system capacity from refill capacity; the Tightening Torque List covers metric fasteners and hydraulic fittings, with component-specific values elsewhere in the manual, including seat-belt mounting bolts.

Tracks, Buckets, and Attachment Controls

Rubber-shoe inspection covers lug wear, exposed steel cords, and core separation. Road-liner replacement calls for a dedicated removal tool, while replacement of all road liners is referred to the distributor.

Bucket-tooth procedures address the different retaining arrangements, and the wear-parts list identifies model-specific filters and bucket components.

Attachment selection: Attachment Combinations compares bucket suitability for standard and long arms, including restrictions on use. Machine Control Patterns illustrates ISO and J/D layouts. The attachment section distinguishes one-way breaker operation from two-way operation for crushers and other general attachments.

Troubleshooting and Repair Scope

Electrical, chassis, and engine symptom tables address charging faults, starting problems, overheating, abnormal pump noise, and slow work-equipment movement. Distributor repair items are marked separately from routine checks and remedies.

Electrical coverage consists of fuse and circuit tables, basic checks, and battery-connection illustrations. This publication does not include full machine wiring diagrams, complete hydraulic schematics, or internal engine and hydraulic-component repair procedures.

Valve-clearance adjustment and alternator or starter inspection are referred to Komatsu. The accumulator section provides handling precautions, and recoil-spring disassembly is assigned to the distributor.

Follow the manual's precautions for raised work equipment, high-pressure oil and grease, and the nitrogen-charged accumulator when planning maintenance.

PDF Contents and Included Cover Page

One printable English PDF contains 248 pages total: 247 pages of Komatsu material, including its cover, front matter, index, publication page, and blank pages. The added page is already included in the total.