Target Audience:
Heavy construction companies, mining operators, equipment rental fleets, and owners needing comprehensive repair information
Segment:
40-50 ton class hydraulic excavators
Manufacturer Market Role:
Komatsu positions the Dash-7 series as high-production machines with advanced technology for demanding earthmoving applications
Advantage:
Design priorities include durability, fuel efficiency, and ease of operation
Technology:
Equipped with advanced hydraulic and engine management systems for enhanced performance
Engine:
Powerful and reliable Komatsu SAA6D125E-3 engine
Hydraulic System:
Advanced load-sensing hydraulic system for precise control
Operator Comfort:
Spacious cab with ergonomic controls
Systems Covered:
Complete disassembly and assembly of all major systems
Procedures Included:
Inspection, testing, and adjustment procedures
Diagnostics:
Troubleshooting information and fault codes
Page Count:
Approximately 1,200 pages
Manual Type:
Workshop Service Manual
Delivery Method:
Instant Download
Engine:
Engine mechanical, cooling, lubrication, fuel, and intake/exhaust systems
Electrical:
Starting, charging, and lighting systems
Hydraulics:
Main pumps, control valves, cylinders, and hydraulic lines
Power Train:
Transmission, final drives, and drive shafts
Undercarriage:
Track frame, rollers, idlers, sprockets, and track adjustment
Swing System:
Swing drive and swing bearing
Cab and Controls:
Operator station, control levers, pedals, and air conditioning
Frame and Body:
Main frame, boom, arm, and attachment brackets
Disassembly and Assembly:
Step-by-step procedures for each component
Inspection and Testing:
Detailed specifications for wear limits and performance testing
Adjustment:
Procedures for calibrations and settings
Troubleshooting:
Systematic diagnostic charts and fault codes
Schematic Diagrams:
Electrical and hydraulic schematics
Level:
Detailed instructions suitable for experienced technicians and advanced DIY owners
Special Tools:
References to necessary special tools with part numbers
Torque Specs:
Torque specifications for all threaded fasteners
Part Numbers:
Original Komatsu part numbers for ordering
Exploded Views:
Illustrated parts breakdowns for major assemblies
Compatibility:
Works on Windows, Mac, Linux, and mobile devices
Requirements:
PDF reader (e.g., Adobe Acrobat Reader)
Searchability:
Text searchable with clickable table of contents for easy navigation
Print Quality:
High resolution print-ready pages
Binding Type:
Digital (not applicable to physical print)
Paper Type:
N/A - digital product, print on your own paper
Primary Engine:
Komatsu SAA6D125E-3
Type:
6-cylinder, turbocharged, air-cooled aftercooled diesel
Power (Gross):
265 kW (355 HP) at 2,000 rpm
Displacement:
11.04 L (673.6 cu in)
Torque:
JIS: 1,470 Nm at 1,400 rpm
Fuel System Type:
Direct injection with electronically controlled high-pressure common rail
Fuel Tank Capacity:
650 L (171.7 gal)
Type:
Hydrostatic transmission with variable displacement pumps and motors
Travel Drives:
Two speed travel motors with planetary reduction
Swing Drive:
Hydraulically driven, planetary gear type
Speed Control:
Electronically controlled travel speed selection
Braking:
Automatic parking brake on travel motors
Length (Overall):
5,690 mm (18 ft 8 in) for PC400-7
Length (Overall):
5,690 mm (18 ft 8 in) for PC450-7
Width (Overall):
3,300 mm (10 ft 10 in) typical
Height (Operator Cab Top):
3,600 mm (11 ft 10 in) typical
Curb Weight:
PC400-7: approximately 41,000 kg (90,390 lb)
Curb Weight:
PC450-7: approximately 45,000 kg (99,208 lb)
Engine Oil Change:
Every 250 hours or 6 months
Hydraulic Oil Change:
Every 2,000 hours or annually
Air Filter Replacement:
Every 500 hours (inspect), replace as needed
Fuel Filter Replacement:
Every 500 hours
Engine Oil:
API CI-4 or higher
Hydraulic Fluid:
Komatsu HYDO or equivalent, ISO VG 46
Coolant:
Komatsu AF-NLC or long-life coolant
Known Issues and Wear Items
Common Wear Items:
Track shoes, bucket teeth, hydraulic hoses, and seals
Known Issues:
N/A - no specific recurring issues reported in known sources for this model
Manufacturer:
Komatsu Ltd., a leading global manufacturer of construction and mining equipment
Series:
Dash-7 series introduced in 2001, following the Dash-6 series
Successor:
Succeeded by Dash-8 models
Built In:
Manufactured in Komatsu plants, possibly in multiple locations including Japan and the USA
