2005-2007 Komatsu D21A-8E0, D21P-8E0 Bulldozer Shop Manual
Diagnostic procedures and component service for Bulldozer D21A-8E0, D21P-8E0 — Steering clutch, brake control, and final drive.
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Komatsu Models Covered & Key Technical Specifications
Komatsu D21A-8E0, D21P-8E0 Bulldozer (SEN03329-04) – 2005-2007 Komatsu D21A-8E0 / D21P-8E0 Shop Manual | Series Dossier.
- Established Power Data: 32.4 kW{HP}/rpm rating at 2,450 rpm supports peak engine performance.
- Reference Component Specs: With a machine weight of 3,940 kg for the D21A-8E0, the structural integrity is significant.
- Certified Dimension Data: Overall length of 3,365 mm establishes robust operational dimensions.
- Factory Clearance Standards: A side clearance of 0.55 – 1.00 mm governs precise component alignment.
- Integral Specifications: Travel speed reaches 2.6 km/h forward in 1st gear parameters.
- Specific Torque Values: The final drive case weighs 353 kg for standard chassis configuration.
Komatsu Manual Features & Content Preview
Unified Assembly Assembly Manual: Bulldozer Manual for Komatsu D21A-8E0, D21P-8E0 bulldozers Parts-Reference
Technical-Scope: 2005-2007 Komatsu D21A-8E0, D21P-8E0 Bulldozer // Engineering-Base: Manual SEN03329-04 / SEN03330-01 / SEN04086-02 / SEN04087-00 / SEN04088-00 / SEN04089-00 / SEN04090-01 / SEN04091-00 / SEN04092-00 / SEN04093-01 Logic // Technical-Scope: shop manual
| Assessment-Parameter | System-Path | Context |
|---|---|---|
| Machine weight | D21A-8E0 | 3,940 kg |
| Engine model | D21A-8E0 | Komatsu 4D94LE-2 Diesel engine |
| Overall length | D21A-8E0 | 3,365 mm |
| Overall height | D21A-8E0 | 2,450 mm |
| Overall width | D21A-8E0 | 2,170 mm |
| Travel speed (Forward 1st) | D21A-8E0 | 2.6 km/h |
| Travel speed (Reverse 1st) | D21A-8E0 | 3.3 km/h |
The documentation provides guidance on:
Engine and Cooling System
This section documents engine control mechanisms and cooling system specifications.
Power Train System
Covers the power train system, including the transmission, bevel gear, steering clutch, and brake controls.
Undercarriage and Frame
Details the undercarriage components such as the main frame, track frame, idlers, rollers, and track shoes.
Hydraulic System
Explains the hydraulic system, including the work equipment control, hydraulic tank, and pumps.
Electrical System
Outlines the electrical system, covering the monitor system, engine control, KOMTRAX, and sensors.
This manual documents torque specifications for various components to ensure proper assembly and pressure slip prevention.
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