Komatsu D20/D21 Series Shop Manual
Service and repair manual for Komatsu D20P-7A, D20PL-7, D20PLL-7, D20AG-7, D20PG-7A, D21A-7, D21AG-7, D21S-7, D21QG-7, D21PG-7A bulldozers from 2000 onwards. Komatsu 010107.
Manual Preview
Sample pages from the Komatsu D20/D21 Series Shop Manual manual
Purchase & Download
Komatsu Models Covered & Key Technical Specifications
Models: D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21S-7, D21AG-7, D21QG-7, D21PG-7A, D21A-7T, D21Q-7
Sub-models / Variants: D20A, D20P, D21A, D21S, D21Q, rubber shoe specification, F2/R2 Transmission, F3/R3 Transmission
Trade Names: Bulldozer
Build Years: 2000 and up
Serial Numbers: D20PL-7: 62001 and up, D20PLL-7: 62001 and up, D20AG-7: 75001 and up, D20P-7A: 75001 and up, D20PG-7A: 75001 and up, D21A-7: 75001 and up, D21AG-7: 75001 and up, D21PG-7A: 75001 and up, D21S-7: 61001 and up, D21QG-7: 61001 and up, D21A-7T: 75001 and up
Technical Data:
- Engine: 4D95S-1 or 4D94E-1A, 4-cycle, water-cooled, in-line vertical, direct injection
- Piston displacement: 2.69 liters (2,690 cc) or 2.77 liters (2,775 cc)
- Rated horsepower: 29.4 kW / 2,450 rpm
- Transmission type: Hydroshift planetary gear (hydraulically actuated) or Spur gear sliding mesh
- Max gradeability: 30 degrees
- Min turning radius: 2.0–3.1 meters depending on variant
- Operating weight: 3,040–4,710 kg depending on configuration
Komatsu Manual Features & Content Preview
Technical Scope and Coverage for the Komatsu D20/D21 Series Bulldozer
- Built for owners and workshops servicing the 2000 Komatsu D20/D21 series, documenting engine, drivetrain, chassis, and hydraulic systems across all primary model variants
- Official Komatsu publication SBM001407, dated December 2000
- Contains 47 detailed exploded-view mechanical diagrams and 12 complex hydraulic circuit schematics with corresponding component index tables
- File delivered as a direct download the moment payment clears
- Indexed PDF search covers every chapter and appendix
- Laid out for standard letter and A4 printing
- This 2000 edition is the base factory publication for the D20/D21 bulldozer line, documenting the transition between earlier transmission configurations and later F3/R3 setups
Component and System Documentation
This 668-page workshop document provides technical specifications for the entire Komatsu D20/D21 bulldozer line, including D20PL-7, D20P-7A, and D21A-7 configurations. The text is partitioned into core sections detailing structure and function, testing and adjustment procedures, disassembly/assembly of main power train components, and comprehensive maintenance standards. It covers engine control systems, main clutch actuation, transmission variations including hydroshift and sliding mesh spur gear designs, and hydraulic circuit layouts for both steering and work equipment.
Specification Highlights and Data Preview
Technical data is provided in standardized tables for quick reference during servicing. Engine displacement is documented at 2.69 liters or 2.77 liters depending on the specific model engine. The main clutch housing torque values and transmission gear combinations are documented to ensure correct assembly. Intake valve clearance and hydraulic pump discharge rates of 47–59 liters per minute are specified within the detailed data charts. Understanding factory workshop documentation is structured allows for accurate maintenance of the hydraulic steering circuits and final drive units.
Note: All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work.
An official 668-page Komatsu OEM workshop manual covering the 2000+ D20/D21 series, documenting engine, chassis, electrical, and hydraulic specifications for the primary bulldozer line.
Manual FAQ, Purchase & Download Details
Customer Reviews
Read what our customers say about this Komatsu Bulldozer manual and share your own experience.