Komatsu HD785-8 Dump Truck Field Assembly Instruction Manual GEN00183-08

Description

Komatsu HD785-8 Dump Truck Field Assembly Instruction Manual — GEN00183-08

This Komatsu HD785-8 Field Assembly Instruction is the document used to assemble the dump truck from its shipping configuration into a complete, working machine. Since the HD785-8 is too large to transport fully assembled, it leaves the factory divided into major units — and this manual (GEN00183-08) explains exactly how those units are joined back together in the field. It applies to machines with serial numbers 50001 and up.

File Details

• Manual type: Field Assembly Instruction
• Brand: Komatsu
• Model: HD785-8 Dump Truck
• Document number: GEN00183-08
• Serial numbers: 50001 and up
• Language: English
• File format: PDF
• Page count: Approx. 363 pages

Chapters Covered

The manual is organized into the following sections, with an extensive illustrated assembly procedure chapter forming the core of the document:

• Foreword and safety instructions
• Precautions for field assembly — work place selection, protective gear, lifting tool checks, meeting procedures
• Disposal of removed parts
• Assembly/welding procedures, necessary equipment, and schedule
• Layout of kit (work space layout)
• Parts overview (main components)
• Dimensions of main components
• Specifications (HD785-8 machine data)
• Tool list for field assembly
• Standard tightening torque table
• Coating materials list
• Selection of wire ropes used for assembly
• Selection of nylon slings used for assembly
• Relationship between work number and packing tag
• Assembly procedure (numbered work steps 00001 through C-0152)
• Machine check sheet for field assembly

What the Assembly Procedure Covers

The assembly procedure is broken into numbered work steps, each with its own tools, parts list, illustrations, and tightening torque values. Major groups include:

• Fluid and lubricant selection by ambient temperature (engine oil, coolant, grease, fuel)
• Oil, grease, and coolant capacities
• Lifting and movement of the bare machine
• Installation of left and right front supports, rear supports, and harnesses
• Cab preparation, cab installation, and shim adjustment
• Right platform preparation, installation, and sub-assembly
• Exhaust pipe installation (with and without body heating), fire prevention covers
• Steering hose installation, connection, and covers
• Front axle assembly (left and right), tie rod installation, axle steps, sensors, and brake cooling hoses
• Rear propeller shaft connection and guard installation
• Cab-to-accumulator hose, brake hose, and air cleaner connections
• Fender and mudguard installation (left and right), side lamp connections
• Rear axle installation (1 and 2), rear axle hoses, cooling hoses, harnesses
• Air conditioner hose bracket, drain hose, radiator heater hose
• Payload meter harness, radio antenna, covers under cab
• Battery disconnect box, engine emergency stop box
• Diagonal ladder step installation (steps 1 through 10, including shipping and packing variants)
• Catwalk mount, catwalk installation, catwalk mount cover
• Tire installation (front, rear, large bore valve variants), wheel valves
• Engine underguard, transmission underguard
• KomVision camera mudguards and harness covers
• Heater mirror harness wiring and installation
• Body preparation, cab guard, platform guard, grease piping, hoist cylinder connections
• Hinge pin, body mount shims, rock ejector, body mudguard, safety pin, closed bolts
• Body positioner sensor rod, angle sensor adjustment, dump control calibration
• Rear suspension adjustment, body decals
• ABS valve sub-assembly and main harness
• Front and rear suspension decals, fender decals
• KomVision settings and camera calibration
• Air conditioner gas charging
• Front and rear suspension installation and adjustment
• Brake air bleeding, steering cylinder air bleeding, hoist cylinder air bleeding
• Greasing procedures
• Light optical axis adjustment
• Brake cooling filter replacement
• Safety-critical section check sheet
• Tire checking and inflation method
• Body welding preparation, assembly, temporary installation, and welding procedures (C-0010 through C-0152)

Why This Manual Matters for Field Assembly

Assembling a 73,800 kg machine from divided units is not a task you improvise. The Komatsu HD785-8 Field Assembly Instruction gives the work supervisor and assembly team the exact sequence, lifting points, torque values, and safety precautions needed to join the bare machine, axles, cab, platform, body, and all supporting systems correctly. Every step includes a parts list so the correct components and hardware are used, and torque values are repeated throughout so nothing is left to guesswork.

The manual covers the complete assembly process — from initial site selection and crane setup, through structural connections and hydraulic hose routing, to final calibration of the body positioner sensor and KomVision cameras. It also includes the body welding procedures required when the dump body is shipped in three divided sections, with gas-cut preparation, tack welding, and final welding instructions.

Safety-Critical Content

Several procedures are marked as safety-critical and are called out in a dedicated check sheet. These include propeller shaft installation (engine to torque converter and transmission to differential), steering column connection, cab mount, and tire hub nut tightening. The manual instructs the work supervisor to hold a safety meeting before assembly begins, appoint a work leader and crane signal man, and assign roles to all workers — especially important when workers of different languages and customs work together.

The foreword also outlines a supervision system diagram, showing the chain from work leader and crane director to operators, mechanics, and liaison/interpreter.

Technical Reference Tables

Beyond the assembly steps, the manual includes reference tables used throughout the job:

• Standard tightening torque table for metric and unified threads
• Tightening torque for O-ring boss piping joints
• Tightening torque for O-ring boss plugs
• Tightening torque for hose fittings (taper seal and face seal types)
• Tightening torque for face seal joints
• Tightening torque for bolts and nuts on 102, 107, and 114 series engines
• Tightening torque for joint bolts and tapered screws on those engines
• Coating materials list (liquid adhesive, anti-seize agent, grease, liquid gasket)
• Wire rope selection table by sling angle and mode coefficient
• Nylon sling rated load table

Machine Specifications Included

The manual includes the HD785-8 specifications table, covering operating weight, unloaded weight, maximum payload, dump body capacity (struck and heaped), dumping speed, engine model, rated horsepower, overall dimensions, minimum ground clearance, minimum turning radius, travel speeds in all forward and reverse ranges, and operating temperature range. These figures are useful for planning the assembly site, selecting cranes, and confirming the machine is configured correctly before work begins.

Get the Komatsu HD785-8 Field Assembly Instruction Manual

If you are responsible for assembling an HD785-8 in the field — whether as a supervisor, mechanic, crane operator, or project engineer — this manual gives you the complete procedure in one document. It covers every major assembly operation, from the bare machine through to the fully assembled dump truck, with torque values, tool lists, and safety checks at each stage.

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