Bulldozer Komatsu D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21AG-7, D21PG-7A, D21S-7, D21QG-7, D21A-7T Shop Manual
Official Komatsu shop manual for the D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21AG-7, D21PG-7A, D21S-7, D21QG-7, and D21A-7T bulldozer models.
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Sample pages from the Bulldozer Komatsu D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21AG-7, D21PG-7A, D21S-7, D21QG-7, D21A-7T Shop Manual manual
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Komatsu Models Covered & Key Technical Specifications
Models: Komatsu D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21AG-7, D21PG-7A, D21S-7, D21QG-7, D21A-7T
Sub-models / Variants: 4D95S-1 engine, 4D94E-1A engine, F2/R2 Transmission, F3/R3 Transmission, Standard track, Rubber shoe spec
Build Years: 2008
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 and 4D94E-1A, 4-cycle, water-cooled, in-line vertical, direct injection
- Displacement: 2.69 liters (4D95S-1) / 2.77 liters (4D94E-1A)
- Rated Horsepower: 29.4 kW (40 HP) at 2450 rpm
- Transmission: Spur gear (D20-7) or Planetary gear (D21-7), forward 3 speed, reverse 2 speed
- Steering: Dry type, multiple disc clutch, spring boosted, PPC actuated
- Hydraulic Pump: Gear type, discharge 47–59 L/min at 2450 rpm
- Operating Weight: 3,040 kg to 4,710 kg depending on configuration
Komatsu Manual Features & Content Preview
Komatsu D20PL-7 and D21 Series Shop Manual
- Covers the 2008 Komatsu D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21AG-7, D21PG-7A, D21S-7, D21QG-7, and D21A-7T bulldozers
- Original OEM publication SEBM001408, February 2008 revision
- Contains hundreds of hydraulic circuit diagrams, power train skeleton schematics, and weight specification tables
- Downloads to your account within seconds of checkout
- Your order stays downloadable from your account for life
- Indexed PDF search covers every chapter and appendix
- Full-text search finds any part number in seconds
- This 716-page volume provides the technical baseline for the 4D95S-1 and 4D94E-1A engine-equipped machine builds
Technical Documentation Scope
The 2008 Komatsu D20PL-7 shop manual organizes technical information into six distinct sections to support workshop-level operations. General specifications, machine-specific drawings for rubber-shoe variants, and comprehensive weight tables for major assemblies provide the foundation. The structure and function chapters detail power train skeletons, main clutch control, and transmission systems, while the testing and adjusting sections document pressure settings for hydraulic circuits and steering controls. Disassembly and assembly information clarifies the mechanical order for components including the steering clutch, final drives, and lift cylinder assemblies.
Specification and Reference Highlights
This publication contains detailed tightening torque values for standard metric bolts and specialized split flange hardware, documented in both Nm and kgm. Fluid capacities are explicitly categorized by ambient temperature ranges, providing precise refill volumes for the engine oil pan, transmission case, and final drive cases. The Komatsu D20PL-7 electrical system is supported by a full wire code table mapping nominal wire sizes to current ratings and circuit applications. Reference data includes performance metrics for forward and reverse gear ranges under various transmission load scenarios. what an OEM service publication covers provides further context for how this technical data is utilized in professional workshop settings. Always consult a certified technician before performing service on this equipment.
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