Komatsu HD785-7 Dump Truck Parts Book LEPBH78701 – Serial J20001 and Up

Description

Komatsu HD785-7 Parts Book – Your Complete Spare Parts Reference

This Komatsu HD785-7 parts book is the definitive spare parts catalog for the HD785-7 dump truck, covering machines from serial number J20001 and up equipped with the SAA12V140E-3 engine (engine serial 500319 and up). Published under document number LEPBH78701, this parts catalog gives you the exploded view illustrations and part number listings you need to identify, order, and replace any component on the machine — from engine internals to the dump body, hydraulics, electrical system, and operator’s cab.

File Details

• Manual Type: Parts Book / Spare Parts Catalog
• Brand: Komatsu
• Model: HD785-7 Dump Truck
• Engine: SAA12V140E-3
• Machine Serial Number: J20001 and up
• Engine Serial Number: 500319 and up
• Language: English
• File Format: PDF
• Page Count: 633
• Document Number: LEPBH78701
• Date: August 2011

Chapters Covered

The Komatsu HD785-7 parts book is organized into comprehensive sections covering every major system and assembly on the truck:

• Engine — Cylinder head, head cover, air intake manifold, pre-heater switch, exhaust manifold, turbocharger and lubricating oil piping, turbocharger water piping, heat shield, exhaust brake and mounting, thermostat and housing, cylinder block, cylinder block accessories (blind cover and sensor), front cover, gear case and front cover accessory, breather and blowby sensor wiring, idler gear, cam follower cover, oil filler, oil pan suction tube, oil level sensor, oil level gauge, flywheel housing, flywheel, front support and rear bracket, crankshaft, damper, piston, crank pulley, camshaft, cam follower, rocker arm, oil pump, oil filter, oil adapter, oil cooler, fuel injection pump mounting, common rail (L.H and R.H), fuel supply pump (L.H and R.H), fuel supply pump bracket and rail return piping, fuel injection piping, fuel supply pump lubricator, fuel injection pump drive, fuel piping (R.H and L.H bank), fuel connection, fuel filter, fuel air vent, fuel priming pump, fuel injection nozzle and spill pipe, fuel return, fuel controller, water pump, water pump bypass piping, air water piping and water outlet, cooling fan, fan pulley and drive belt, fan drive, tension pulley, corrosion resistor, alternator mounting, alternator, alternator drive, starting motor mounting, starting motor, electrical wiring, cylinder head gasket kit, cylinder block gasket kit, water pump gasket kit, pre-lubrication piping, name plate and caution, PM-clinic accessory, fuel filter (poor fuel arrangement spec), fuel pre-filter, joint, switch and plate, water separator and sensor
• Engine Related Parts — Engine cooling tube, engine damper, engine fuel line (various configurations including additional fuel filter and water separator), engine air intake, engine control (engine harness), vehicle health monitoring system, engine earth and heater relay harness, engine air conditioner related parts, engine mounting, engine mounting exhaust bracket
• Cooling System — Radiator with air conditioner, radiator mounting bracket, radiator baffle, radiator coolant line, radiator coolant level sensor, radiator brake cooler piping, radiator air conditioner related parts, radiator fan net and mounting parts, coolant line, coolant line bypass tube, coolant line air intake piping
• Fuel System — Fuel tank (tank, suction valve, fuel quick charger valve and pre-filter, bolt hole plug, mounting cover, mounting bracket), fuel line (tank to block, block, clamp, water separator configurations, filter to engine, engine to block)
• Electrical System — Battery box (battery large capacity, stay, box, relay, circuit breaker additional filter), rear hood battery isolator, breather, brake line (under hood, valve box, cab hood), battery box large capacity fuel arrangement, rear hood related parts, electrical system main harness, bracket clamp, starter cable, horn and bracket, clip R.H, rear lamp bracket, rear lamp lamp and buzzer, rear lamp mounting parts, side lamp harness cover for payload meter, side lamp, payload meter lamp R.H and L.H
• Power Train — Front propeller shaft unit, rear propeller shaft unit, torque flow assembly, transmission mounting parts, hydraulic pump, transmission piping (suction, pre-filter, filter, breather tube, oil pan piping, pump suction, steering and hoist piping, pump to brake, BCV filter, brake cooling oil piping, brake piping, PM clinic), torque converter (bare unit, input shaft, drive case, rear housing, power take off, valve mount, charge pump), transmission (1st/2nd/3rd and reverse clutch, high clutch, low and 4th clutch, carrier sections, case, docking unit, input and output), transmission control valve, transmission lubrication valve, transmission oil pan, transmission sensor, rear axle differential, rear axle final drive L.H and R.H, rear axle final brake L.H and R.H, rear axle housing, rear axle brake piping, rear axle sensor ABS/ASR, rear axle blind parts, rear axle support (pin group, lubricating group, rod group), transmission mounting parts, front axle R.H and L.H (hub, brake, front suspension assembly cylinder, valve, cover, sensor for payload meter, lubrication, lever, final brake line, brake cooling line, transport), front axle hose clip payload meter
• Hydraulic System — Hydraulic tank assembly, hydraulic tank valve, hydraulic tank transmission filter, hydraulic tank brake cooling line, hydraulic tank suction line, hydraulic tank petrol piping, hydraulic tank dump control valve to filter line, hydraulic tank steering valve line, hydraulic tank hoist valve to dump control line, hydraulic tank hoist line, hydraulic tank return line, hydraulic tank transmission to filter line, hydraulic tank emergency steering line, hydraulic tank sensor, hydraulic tank steering and hoist piping, hydraulic tank cap, hydraulic tank transmission piping breather tube, hydraulic tank hose and clip dump control, hydraulic tank hose clip, brake control valve, brake control valve bracket, brake control valve inner parts, transmission piping, steering and hoist piping (steering cylinder, cross over valve for ASR, pump to filter, hoist valve to hoist cylinder, piping pump section, dump control, pump to valve, exhaust brake, demand valve to steering valve), crossover relief valve, hydraulic piping EPC valve inner parts, brake cooling oil line (pump to rear brake, T/M to front brake, rear brake to oil cooler, oil cooler to filter, brake control valve to filter, sensor), accumulator box R.H and L.H, accumulator mounting parts, accumulator charger valve inner parts, brake piping (filter line, frame L.H side, frame R.H side, for ASR, parking brake valve line, brake sub tank, proportional valve line, front brake piping R.H and L.H, filter inner parts, parking brake valve inner parts, proportional valve inner parts), emergency steering flow switch
• Main Frame and Related Parts — Main frame, main frame frame, main frame bracket, main frame fender installation bracket, main frame axle support, rear support, front support (support and head lamp L.H and R.H, mounting parts, bracket, step, steering valve, steering piping, cab mounting parts), engine fuel filter and related parts L.H and R.H, positioner, air intake, exhaust piping, engine control engine harness, engine earth additional filter, transmission control, steering link (lever and rod, link parts, lubrication ASR), emergency steering control (motor, related parts), lubrication piping
• Operators Compartment and Control System — Operator’s cab (cab, L.H door, R.H door, door related parts, glass, antenna cable, wiper, sheet cab inside, cab accessory, roof pad and cover, mark and plate, window washer tank, air conditioner filter), floor (floor related parts, accelerator pedal, brake control, air conditioner piping, dashboard, air duct, radio less, radio and cassette AM/FM, monitor decal, monitor panel KM/H, steering column, column switch and steering wheel with sensor, column switch and steering wheel, monitor decal, operator’s seat, operator’s seat inner parts, dump control, console box, console box 12V DC less, rear cover, auxiliary seat, auxiliary seat seat belt 75MM, fuse box and relay, side lamp relay, roll over angle sensor, roll over angle sensor less parts, floor wiring, emergency starting timer, rear cover, payload meter angle sensor, payload meter angle sensor less parts, VHMS, engine pre-lub system less parts, cab under parts), floor mat, cab guard (front step, side step, toe guard, side mirror L.H, step mounting parts, radio antenna, cap, mud guard, cab under cover)
• Platform and Related Parts — Platform sub assembly L.H, platform sub assembly platform related parts, platform sub assembly R.H platform, platform sub assembly R.H mud guard, platform sub assembly R.H handrail, platform sub assembly R.H toe guard, platform sub assembly R.H toe guard auto grease, platform sub assembly R.H anti slip rubber, coolant reserve tank vandalism protection, under mirror, side mirror
• Guard and Cover — Radiator guard, engine hood, fire protection engine rear cover
• Rim and Tire — Rim front wheel, rim rear wheel, tire 27.00 R49 E4 Bridgestone, tire 27.00 R49 E4 GP Belshina, tire 27.00 R49 E4 VMTS Bridgestone, tire 27.00 R49 E4 Michelin, rear suspension, rear suspension pressure sensor
• Body — Body, body with platform guard, body with body liner, body with 300mm spill guard, body accessory, rock injector, hoist cylinder L.H and R.H, body with 300mm spill guard, body with platform guard, exhaust box
• Marks and Plates — Name plate unit, name plate unit English, name plate unit Indonesian
• Tool — Spare parts, cap and overall, general tool unit hose, general tool unit, tool box unit, payload meter soft
• Miscellaneous — Air conditioner related parts, cap lock, fire extinguisher English, fire extinguisher Indonesian, front propeller shaft guard, rear propeller shaft guard, ABS/ASR chassis (steering sensor, common wiring harness, valve), ABS/ASR valve wiring harness, vehicle health monitoring system less, vehicle health monitoring system clamp, vehicle health monitoring system down load
• Services Kit — Service kit, hydraulic pump steering and hoist, hydraulic pump, hoist cylinder inner parts, steering cylinder L.H and R.H inner parts, accumulator brake control inner parts, hoist valve, demand valve, check valve, electric lever, accel pedal

This Komatsu HD785-7 parts book is not a repair manual — it is the spare parts identification and ordering tool that every workshop, parts department, and maintenance planner needs to keep the HD785-7 dump truck running. Each section presents an exploded view illustration on the left page with index numbers, and on the right page the corresponding part numbers, descriptions, quantities, and applicable serial number ranges. This structure lets you visually identify a component, find its index number, and immediately locate the correct Komatsu part number for ordering.

What makes this parts catalog particularly valuable is the level of detail it provides for the SAA12V140E-3 engine and the HD785-7’s major systems. The engine section alone spans dozens of pages covering everything from the cylinder head, piston, and crankshaft to the common rail fuel system, turbocharger, water pump, oil cooler, and electrical wiring. The power train section breaks down the torque converter, transmission, and rear axle into their individual components, with separate sections for the final drive and brake assemblies on both left-hand and right-hand sides. The hydraulic system section covers the hydraulic tank, brake control valve, steering and hoist piping, and the accumulator system in exhaustive detail.

For anyone maintaining or repairing an HD785-7, having the correct part number is critical — ordering the wrong component wastes time and money, and in some cases can lead to equipment damage. This parts book eliminates that risk by showing you exactly which part is used in each position, along with the serial number range that applies. Whether you are replacing a sensor, a hydraulic hose, a clutch disc, or a complete assembly, the exploded view and part listing give you the confidence that you are ordering the right item.

What You Can Do With This Parts Book

• Identify any spare part on the HD785-7 dump truck by visual reference to exploded view illustrations
• Find the correct Komatsu part number for every component, from O-rings and gaskets to complete assemblies
• Verify which parts apply to your specific machine serial number and engine serial number
• Order parts accurately without relying on guesswork or incomplete dealer information
• Understand how assemblies are put together by studying the exploded diagrams
• Reference the correct quantities required for each part during a rebuild or repair
• Locate parts for optional equipment and special specifications such as additional fuel filters, water separators, cold terrain specs, and poor fuel arrangement specs

Why This Parts Book Matters

Dump trucks like the Komatsu HD785-7 are built to work hard in demanding conditions, and keeping them operational requires fast, accurate parts identification. A parts book is the bridge between the machine and the parts counter — it tells you what a component is called, what it looks like, where it fits, and what number to order. Without it, you are relying on memory, dealer databases, or trial and error, all of which cost time and money.

This parts book covers not just the standard machine but also optional equipment and attachments, including the PM-clinic accessory, cold terrain specifications, extremely bad fuel and poor fuel arrangement specifications, and additional fuel filter configurations. That breadth makes it useful whether you are running a standard HD785-7 or one configured for a specific environment or fuel quality.

The document also includes a comprehensive index at the back, organized by part number, making it easy to look up a part number you already have and find the illustration and description that goes with it. This is particularly useful when you have a part number from a previous order or from a component that needs replacing and want to confirm it is the right item for your machine.

Delivery

IMAGES PREVIEW

This Komatsu HD785-7 parts book is delivered as an instant PDF download. There is no shipping, no waiting for a physical book to arrive, and no risk of a damaged or lost package. Once your order is complete, you can download the file immediately and start using it on any device — laptop, desktop, tablet, or smartphone. The PDF is printable, so you can print individual pages for use in the workshop or keep the entire 633-page catalog on a tablet for easy reference at the machine. Whether you are a Komatsu dealer, an independent workshop, a fleet maintenance manager, or an owner-operator, this parts book gives you the parts identification capability you need, right when you need it.