Factory workshop manuals
Komatsu Repair Manuals
- Instant PDF download
- OEM repair procedures
- Wiring diagrams & torque specs
Komatsu, Japan's construction and mining equipment giant founded in 1921, designs and builds many of the diesel engines used in its own machines. This page offers workshop, service and repair manuals for Komatsu engines fitted to excavators, bulldozers, wheel loaders and haul trucks.
Komatsu Ltd. was founded in 1921 in the city of Komatsu, Ishikawa Prefecture, Japan, where the company's name and main plants still originate. Growing from mining machinery into construction equipment, Komatsu became one of the world's two largest makers of earthmoving machines, with a reputation for quality manufacturing and in-house component production.
Komatsu is known for heavy-duty engineering across bulldozers, hydraulic excavators, wheel loaders and rigid dump trucks, and for building its own diesel engines rather than relying entirely on outside suppliers. Its engines are respected for durability in construction, mining, quarrying and forestry, where machines run long hours in severe conditions. Beyond machine engines, Komatsu power units are also applied in generators and industrial installations, extending the value of its service documentation well beyond the yellow iron on construction sites.
The manuals on this page cover Komatsu engines and equipment in depth, including mechanical overhaul, fuel injection and emission control systems, cooling and lubrication, hydraulic circuits, electrical systems with wiring diagrams, torque specifications and diagnostic procedures. Scheduled maintenance programs help keep machines available and safe on site. Engine series such as the 107 and 108 families documented in the listings show the continuity of design that lets older machines remain supportable for decades.
These factory documents are intended for equipment owners, contractor maintenance teams, independent heavy-equipment technicians and engine rebuilders. With correct specifications at hand, Komatsu machines can be serviced and repaired to manufacturer standards and kept productive for decades.
Komatsu Models
208 models-

Komatsu Skid Steer Loaders
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Komatsu SK 1026 Models
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Komatsu Wheel Loaders
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Komatsu 108 Series
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Komatsu 4D106
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Komatsu S4D106
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Komatsu 108
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Komatsu PC400 7
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Komatsu 4D98E
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Komatsu 108 2
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Komatsu 102E Series
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Komatsu 3D82AE Series
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Komatsu 3D84E Series
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Komatsu 3D88E Series
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Komatsu 4D106 Series
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Komatsu 4D88E Series
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Komatsu 4D98E Series
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Komatsu S4D106 Series
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Komatsu S4D84E Series
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Komatsu S4D98E Series
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Komatsu 4D98
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Komatsu 3D82AE
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Komatsu 3D84E
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Komatsu 3D88E
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Komatsu 4D88E
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Komatsu S4D84E
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Komatsu 110 Series
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Komatsu SAA6D125E-5
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Komatsu DCA Series
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Komatsu Denyo
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Komatsu Generators
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Komatsu Home and Garden
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Komatsu Power Equipment
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Komatsu Material Handling
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Komatsu 95 3
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Komatsu Yanmar
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Komatsu WA 150 Models
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Komatsu SA6D125E-3
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Komatsu SAA6D125E-3
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Komatsu 102-1
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Komatsu 102-2
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Komatsu SER.
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Komatsu 102 Series
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Komatsu 125E-5
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Komatsu 110
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Komatsu 12V140E-3 Engine
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Komatsu 4D94E
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Komatsu SA12V140Z-1
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Komatsu 170 3
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Komatsu 95E-5
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Komatsu SK 1020 Models
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Komatsu S6D140-2
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Komatsu SA6D140-2
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Komatsu 108-2 Series
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Komatsu PC Models
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Komatsu 114
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Komatsu 102
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Komatsu 105
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Komatsu 95
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Komatsu 125
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Komatsu 102 2
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Komatsu 102 E
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Komatsu 102 1
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Komatsu 102 E 1
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Komatsu 108 1
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Komatsu 114 3
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Komatsu 114 E 1
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Komatsu 125 2
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Komatsu 125 3
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Komatsu 14 3
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Komatsu 140 2
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Komatsu 140 3
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Komatsu 140 E 5
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Komatsu 155 4
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Komatsu 170 2
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Komatsu 170 E 5
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Komatsu 3 D 4 D S 4 D
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Komatsu 4 FA 1
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Komatsu 4 FE 1
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Komatsu 60125 2
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Komatsu 72 2
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Komatsu 74 E
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Komatsu 75 2
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Komatsu 78 1
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Komatsu 84 2
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Komatsu 94 98
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Komatsu 95 1
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Komatsu 95 2
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Komatsu 95 E 5
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Komatsu 98 E
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Komatsu 98 E 5
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Komatsu 98 E 6
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Komatsu H 20
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Komatsu KDC 410
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Komatsu KDC 610
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Other Komatsu
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Komatsu WB Models
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Komatsu KDC 614
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Komatsu Series Manuals
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Komatsu N 855
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Komatsu 150 A
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Komatsu 150 FA
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CD Series
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D Series
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TD Series
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Komatsu 210M
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Komatsu 330M
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Komatsu 530M
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Komatsu 630E
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Komatsu 730E
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Komatsu 830E
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Komatsu 830E 1AC
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Komatsu 830E AC
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Komatsu 860E 1K
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Komatsu 860E 1KT
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Komatsu 930E
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Komatsu 930E 2
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Komatsu 930E 4SE
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Komatsu 960E 1
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Komatsu HA250
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Komatsu HA250 1
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Komatsu HA270
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Komatsu HA270 1
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HD Models
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HM Models
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Other Komatsu
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Other Komatsu
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PC Models
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H Models
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PW Models
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Komatsu 850 B
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Komatsu 675
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Komatsu 830 B
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Komatsu 830 C
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Komatsu 850 C
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Komatsu 870 B
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Other Komatsu
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Komatsu 870 C
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Komatsu GD 555
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Other Komatsu
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Other Komatsu
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Komatsu Series Manuals
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Komatsu SK 815 Models
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WD Series
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Galeo
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Komatsu 20 F
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Komatsu 60 E
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Komatsu W 90 3
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Komatsu WA 100 Models
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Komatsu WA 120 Models
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Komatsu WA 1200 Models
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Komatsu WA 180 Models
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Komatsu WA 200 Models
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Komatsu WA 250 Models
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Komatsu WA 270 Models
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Komatsu WA 30 Models
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Komatsu WA 300 Models
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Komatsu WA 320 Models
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Komatsu WA 350 1
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Komatsu WA 380 Models
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Komatsu WA 430 Models
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Komatsu WA 400 Models
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Komatsu WA 420 Models
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Komatsu WA 450 Models
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Komatsu WA 470 Models
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Komatsu WA 480 Models
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Komatsu WA 50 Models
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Komatsu WA 600 Models
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Komatsu WA 500 Models
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Komatsu WA 65 Models
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Komatsu WA 70 Models
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Komatsu WA 800 Models
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Komatsu WA 80 Models
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Komatsu WA 700 Models
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Komatsu WA 90 Models
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Other Komatsu
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Komatsu WA 900 Models
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BX Series
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AE Series
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AM Series
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CX Series
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FB Series
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FBRJ Models
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Other Komatsu
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Other Komatsu
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FD Series
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960E-1
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SK1020-5
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SK714-5
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D85EX-15
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D65E-12
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FG Series
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D155AX-5
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Komatsu 450FXL 1
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D31EX-21
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PC400-7
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D65EX-15
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D41E-6
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D31E-20
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D575A-2
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SK815-5
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860E-1Kt
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Other Komatsu
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Other Komatsu
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D20A-6
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Bulldozer
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WH Series
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EG Series
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vendorKomatsuKomatsu WA450-1 WA 450 Shop Service Repair Workshop Manualkomatsu WA450-1 WA 450 WORKSHOP SERVICE SHOP MANUAL WITH S/N 20001 AND ON, IF YOU OWN OR WORK ON THIS LOADER THEN THIS IS THE SHOP MANUAL FOR YOU, COVERS ALL YOU NEED TO KNOW IN THE SERVICE AND REPAIR...
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vendorKomatsuKomatsu Fork Lift Truck Parts IPL Catalog🏷️ Basic Information Identification Make: Komatsu Model: Fork Lift Truck Model Variants: FG(D) 20/25/30-16, FG(D) 20H/25H-16, FG30H-16, FG(D) 20N/25N/30N-16 Chassis Serial Numbers: 700001 and up Production Years Covered: N/A - not specified; serial range 700001 and up indicates late production...
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vendorKomatsuKomatsu 108 Diesel Engines 6d108e-2 All -2 Series Shop Service...Komatsu 108 Diesel Engines 6d108e-2 All -2 Series Shop Service Repair Workshop Manual VEHICLE INTRODUCTION: This professional service repair manual provides comprehensive coverage for the Komatsu. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information,...
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vendorKomatsuKomatsu 108 Series Service Repair Workshop ManualKomatsu 108 Series Service Repair Workshop Manual VEHICLE INTRODUCTION: This professional service repair manual provides comprehensive coverage for the Komatsu. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications to ensure proper...
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vendorKomatsuKomatsu Wb150aws-2 WB150 Backhoe Loader Shop Service Repair Workshop Manual🏷️ Basic Information Identification Make: Komatsu Model: WB150AWS-2 Model Variant: WB150 Backhoe Loader Production Years Covered: Refer to manual for specific model-year applicability 👋 Introduction Market Position Target Audience: Technicians, mechanics, and DIY enthusiasts Competitive Analysis Advantage: Comprehensive factory-level repair...
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vendorKomatsuKomatsu Sk1026-5 Turbo Skid Steer Shop Service Repair Workshop Manual🏷️ Basic Information Identification Make: Komatsu Model: SK1026-5 Turbo Model Variant: Skid Steer Loader Production Years Covered: Refer to manual for specific model-year applicability 👋 Introduction Overview Target Audience: Technicians, mechanics, and DIY enthusiasts Competitive Advantage: Factory-level repair procedures and...
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vendorKomatsuKomatsu SK815-5N SK815-5NA Skid Steer Shop Service Repair Workshop Manual🏷️ Basic Information Identification Make: Komatsu Model: SK815-5N, SK815-5NA Model Variant: SK815-5N and SK815-5NA (North American and other markets as applicable) Production Years Covered: Refer to manual for specific model-year applicability 👋 Introduction Market Position Target Audience: Technicians, mechanics, and...
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vendorKomatsuKomatsu Sk1020-5n Sk1020-5na Loader Service Repair Workshop ManualService manual for the Komatsu SK1020-5n and SK1020-5na Skid Steer Loaders. Covers these serial numbers: SK1020-5N A70001 and up SK1020-5NA A60001 and up ENGINE S4D98E-2 CONTENTS 01 GENERAL . . . . . . . . . . . ....
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vendorKomatsuKomatsu 630E Master Service Repair Workshop ManualEVERYTHING there is to know about repairing the 60E Truck!!!
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vendorKomatsuKomatsu D31e-p-pl-pll-s-q-18 D37E P-2 Shop Service Repair Workshop ManualKomatsu D31e-p-pl-pll-s-q-18 D37E P-2 Shop Service Repair Workshop Manual VEHICLE INTRODUCTION: This professional service repair manual provides comprehensive coverage for the Komatsu. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications to...
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vendorKomatsuKomatsu D31e-p-pl-pll-s-q-20 D31P-20A Shop Service Repair Workshop ManualKomatsu D31e-p-pl-pll-s-q-20 D31P-20A Shop Service Repair Workshop Manual VEHICLE INTRODUCTION: This professional service repair manual provides comprehensive coverage for the Komatsu. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications to ensure...
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vendorKomatsuKomatsu D85EX D85px-15-15r-15e0 Bulldozer Shop Service Repair Workshop Manual🏷️ Basic Information Identification Make: Komatsu Model: D85EX / D85PX Model Variant: -15, -15R, -15E0 Production Years Covered: Refer to manual for specific model-year applicability Machine Type: Crawler Bulldozer 👋 Introduction Market Position Target Audience: Technicians, mechanics, and DIY enthusiasts...
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vendorKomatsuKomatsu Towing Tractor Wt500e-1 Shop Service Repair Workshop Manual🏷️ Basic Information Identification Make: Komatsu Model: WT500E-1 Variant: Towing Tractor Production Years: Refer to manual - not specified 👋 Introduction Market Position Target Audience: Technicians, mechanics, and DIY enthusiasts Competitive Advantage Advantage: Factory-level repair procedures and diagnostics Key Features...
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vendorKomatsuKomatsu 630E Dump Truck Shop Service Repair Workshop ManualThis manual provides detailed service information, step-by-step repair instruction and maintenance specifications for The 630E Komatsu Dump Truck. This Manual is written for use by the service technician and is designed to help the technician become fully knowledgeable of the...
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vendorKomatsuKomatsu PC300-8 Pc300lc-8 PC350-8 Pc350lc-8 Shop Service Repair Workshop ManualKomatsu PC300-8 Pc300lc-8 PC350-8 Pc350lc-8 Shop Service Repair Workshop Manual VEHICLE INTRODUCTION: This professional service repair manual provides comprehensive coverage for the Komatsu. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications...
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