Komatsu PC10-7, PC15-3, PC20-7 Mini Excavator Shop Manual - Comprehensive Maintenance & Repair Procedures 1989-1994
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Sample pages from the Komatsu PC10-7, PC15-3, PC20-7 Mini Excavator Shop Manual - Comprehensive Maintenance & Repair Procedures 1989-1994 manual
Purchase Information
1989-1994 Komatsu PC10-7 PC15-3 PC20-7 Excavator Shop Manual - Technical Specifications
- Document Number / Seller:
- 27582 / Rebecca Murphy
- File Size:
- 12.21 MB
- File Type:
- Language:
- English
- Pages:
- 262
- Printable:
- Yes
- Estimated Download Time:
- 0.25 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Mini Excavator
- Brand:
- Komatsu
- Reviewed and Approved:
- Dec 27, 2025
Komatsu Models and Parts Covered in this Mini Excavator Manual
- PC10-7 (1990-1994)
- PC15-3 (1989-1994)
- PC20-7 (1989-1994)
- 3D78N-1B (1990-1994)
- 3D84N-2K (1989-1994)
- 3D84N-2H (1989-1994)
Complete Manual Information
Komatsu PC10-7, PC15-3, PC20-7 Mini Excavator Shop Manual – Expert Repair & Maintenance Guide
Keep your Komatsu equipment running at peak performance with this definitive Shop Manual. Specifically authored for the PC10-7, PC15-3, and PC20-7 series, this professional-grade technical document provides the deep-dive specifications and step-by-step procedures required to maintain, troubleshoot, and overhaul your machinery with factory precision.
Targeted Model & Serial Number Coverage
This manual is precise, ensuring you have the exact data for your specific machine build:
- Komatsu PC10-7: Serial No. 25001 and up (Equipped with 3D78N-1B Engine)
- Komatsu PC15-3: Serial No. 5001 and up (Equipped with 3D84N-2K Engine)
- Komatsu PC20-7: Serial No. 35001 and up (Equipped with 3D84N-2H Engine)
Comprehensive Technical Sections
This is not just a basic overview; it is a full-scale technical resource divided into specialized chapters for efficient navigation:
- Structure and Function: Understand the "why" behind the "how." This section breaks down every component—from the swing circle and planetary gears in the swing machinery to the complex internal valving of the 7-spool control block.
- Testing and Adjusting: Eliminate guesswork. Includes precise standard values for engine speeds (high/low idling), relief valve pressures (up to 210 kg/cm² on PC20-7), and hydraulic drift tolerances.
- Disassembly and Assembly: Master complex repairs with illustrated guides for removing and installing heavy components like the travel motor assembly, revolving frame, and hydraulic cylinders.
- Maintenance Standards: Get the exact wear limits and judgment criteria for inspecting disassembled parts to determine if they need replacement or can be safely reused.
Pro-Level Specifics & Added Value
- Engine Optimization: Detailed data for the 78 and 84 Series engines, including valve clearance adjustments (0.20mm for intake/exhaust) and fuel injection timing (14° to 16° B.T.D.C depending on model).
- Hydraulic Precision: Deep technical specs on the SBR series hydraulic pumps (theoretical delivery of 10.5+10.5+6.4 cc/rev) and safety valve settings for the swing system.
- Electrical Diagnostics: Full wiring diagrams and connector locations to solve sensor issues or monitor panel glitches quickly.
- Safety First: Dedicated "Important Safety Notice" section with hoisting instructions for heavy parts (25 kg+) and standard torque tables for bolts and nuts to prevent mechanical failure.
Designed for Professional Results
Whether you are a fleet owner looking to reduce downtime or a technician performing a full system pressure test, this manual provides the unique technical data that generic guides miss. From bleeding air out of a newly installed swing motor to checking the hydraulic drift of the boom cylinder, every procedure is designed to restore your Komatsu excavator to its original factory standards.
Stop relying on trial and error. Invest in the technical knowledge that ensures the longevity, safety, and reliability of your Komatsu PC Series Mini Excavator.
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Frequently Asked Questions - Komatsu Mini Excavator Manual
What does this Komatsu manual cover?
This comprehensive service manual covers detailed repair procedures, maintenance schedules, troubleshooting guides, and technical specifications for Komatsu PC10-7, PC15-3, PC20-7 Mini Excavator Shop Manual - Comprehensive Maintenance & Repair Procedures 1989-1994. It includes information for the following models: - PC10-7 (1990-1994) - PC15-3 (1989-1994) - PC20-7 (1989-1994) - 3D78N-1B (1990-1994) - 3D84N-2K (1989-1994) - 3D84N-2H (1989-1994).
Is this manual suitable for beginners?
Yes, this Komatsu manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Mini Excavator maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (12.21 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your Komatsu Mini Excavator manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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