Komatsu D68E-1 / D68E-1A / D68P-1A / D68P-1 / B1001 / 45590 Workshop Manual
Comprehensive repair and diagnostic procedures for Komatsu D68E-1, D68E-1A, D68P-1A, D68P-1, B1001, and 45590 bulldozers. Includes detailed diagrams and specifications for all major systems. Part number: SEBMU1440102
Komatsu Models Covered & Key Technical Specifications
Models: Komatsu D68E-1, Komatsu D68E-1A, Komatsu D68P-1, Komatsu D68P-1A
Sub-models / Variants: Brazilian (D68E-1A, D68P-1A)
Model Years: Not specified
Serial Numbers: D68E-1 (1001 and up), D68E-1A (B1001 and up), D68P-1 (45590 and up), D68P-1A (B1001 and up)
Technical Data:
- Engine speed (max, no load): 2,050–2,150 rpm
- Engine speed (min, no load): 600–630 rpm
- Valve clearance (intake/exhaust): 0.33 mm / 0.71 mm (cold)
- Compression pressure (min): 34 kg/cm²
- Engine oil pan capacity (refill): 26 liters
- Engine assembly weight: 1,500 kg
- Radiator/torque converter cooler assembly weight: 180 kg
Komatsu Manual Features & Content Preview
- Covers the Komatsu D68E-1, D68E-1A, D68P-1, and D68P-1A Bulldozer series with serial numbers starting from 1001, B1001, and 45590.
- Official 409-page Komatsu publication (SEBMU1440102) documenting the 6D125-1 engine platform, chassis, and electrical systems for the standard and Brazilian configuration units.
- Includes 64 detailed exploded-view diagrams, 9 hydraulic control schematics, and 2 complete electrical wire coding tables.
- Serves as the primary technical reference for diagnostic workflows, component teardowns, and standard repair tasks.
Component and System Documentation
The workshop manual details the structural design and functional operation of the 6D125-1 engine assembly, the TORQFLOW power train, and the heavy-duty undercarriage components. Sections cover specific hydraulic circuitry, focusing on the modulation of torque converter relief valves, steering control valves, and transmission lubrication standards. Maintenance data includes exact component weights for safe hoisting, fluid capacity charts for engine oil and transmission systems, and standardized torque specifications for bolting configurations. This documentation provides essential baseline data when evaluating system integrity or executing a complex repair.
Technical Specifications and System Reference
Engine performance parameters are clearly defined within the text. The manual lists max-load speeds of 2,050–2,150 rpm alongside compression pressure thresholds of 34 kg/cm² for accurate diagnostic comparisons. Valve clearance specs are provided for cold intake (0.33 mm) and exhaust (0.71 mm) setups. Transmission hydraulic circuit pressures are strictly regulated at 2 to 3 kg/cm² for the torque converter, while the TORQFLOW pump maintains a delivery rate of 73.7 liters per minute at 1,850 rpm. Understanding how the system is categorized by component group streamlines troubleshooting on the shop floor.
Safety first in the workshop: The specifications highlighted here offer a brief technical overview. Always consult the full OEM data and adhere to established shop safety protocols before initiating any hands-on mechanical work.
Customer Reviews
Read what our customers say about this Komatsu Bulldozer manual and share your own experience.