Komatsu GD825A-2 Motor Grader Parts Book PDF – Complete Illustrated Parts Catalog

Description

Komatsu GD825A-2 Motor Grader Parts Book – Complete Illustrated Parts Catalog

This Komatsu GD825A-2 Motor Grader Parts Book is the complete illustrated parts catalog for the GD825A-2 motor grader, serial number 11001-UP. Every section is built around exploded-view illustrations with itemised callouts and matching parts tables, so you can trace any component from the drawing straight to its part number, description, quantity and serial-number applicability. The engine coverage is built around the S6D140E-2B diesel, serial number 23227-UP.

Whether you are rebuilding a clutch pack, ordering a hydraulic hose, sourcing a final drive gear or simply replacing a worn seal, the Komatsu GD825A-2 Motor Grader Parts Book PDF gives you the exact numbers Komatsu assigned to that machine so you can order once and order right.

What This GD825A-2 Parts Book Covers

The GD825A-2 parts catalog follows the machine from the cylinder head down to the ripper point. It is organised into engine, transmission, driveline, hydraulic, steering, frame, operator compartment, work equipment and tooling groups, each with its own exploded illustrations and detailed parts list. Major groups include:

• Engine – S6D140E-2B (S/N 23227-UP): cylinder head, head cover, air intake manifold, air cleaner, exhaust manifold, turbocharger and mounting, turbocharger inner parts, cylinder block (both halves), front cover, front cover mounting, idler gear, camfollower cover, oil pan and suction tube (with and without pan heater), oil level gauge, flywheel housing, flywheel, engine mounting, crankshaft, damper, piston, crank pulley (hardened and non-hardened), rocker arm and housing, camshaft and camfollower, fuel injection pump (pump and governor sections), fuel injection pump mounting, coupling, fuel filter, water separator, injection nozzle and nozzle holder inner parts, engine stop motor, water pump, air vent, cooling fan, fan pulley, fan drive, alternator (50A and 75A), starting motor (11KW), heater switch wiring, injection pump safety guard, air compressor and unloader valve, gasket kits (cylinder head, cylinder block, air compressor, water pump), tamper-proof kit and name/caution plates.
• Engine and transmission mounting: cushions, plates, shims, brackets, bolts and dowel pins for both the engine and transmission.
• Radiator and cooling piping: hoses, tubes, gaskets, clamps, elbows and connectors by serial range.
• Fuel system: fuel tank (with fast-fill cap), tank guard, fuel piping and fuel piping with water separator.
• Battery: battery, terminals, hold-down plates, washers, U-bolts and holders.
• Instrument panel: standard, with hazard switch, with door wiper and with rear wiper variants, plus caps, switches, gauges and plates.
• Electrical system: front line, monitor panel line, instrument panel line, center line, battery line, engine line, transmission control line, transmission solenoid valve cover, head lamp, turn signal lamp, front work lamp (two variants), rear work lamp, back-up lamp, oil pan heater wiring, blade accumulator wiring and float blade wiring.
• Drive shaft and joint.
• Transmission: transmission case, P.T.O. (three sections), transfer case, reverse clutch, forward clutch, 4th and 3rd clutch, 2nd clutch, 1st clutch, low and high clutch, output shaft (two sections), parking brake, control valve (five sections), transmission pump, transmission filter, transmission piping, transmission oil cooler piping and transmission oil pressure check piping.
• Differential piping including relief valve and solenoid valve.
• Final drive case (two sections) and final drive gear (two sections) with bevel gear, differential case, pinions, bearings, cages and shims.
• Tandem drive case and tandem drive gear and chain.
• Final drive pump.
• Steering: steering valve, steering pilot check valve, steering cylinders (L.H. and R.H.), leaning cylinder (two variants), articulate cylinder (two variants), emergency steering pump, steering piping (two sections), emergency steering piping and emergency steering wiring.
• Front axle (three sections) with housings, king pins, tie rod, ball studs, boots, bushings and seals.
• Wheel and tire: tubeless (18.0-25-12PR and 23.5-25-12PR rock and traction), tubed variants, rims, side rings, lock rings, bands, drivers, valves, cores, caps, tubes and flaps.
• Fuel control lever (multiple serial variants), accelerator pedal, transmission control lever (body and shift lever, shift lock lever, electrical system), inching pedal (two variants).
• Steering wheel and steering column components.
• Console box and pedal hardware.
• Hydraulic control levers (L.H. and R.H.), ripper control lever and optional work equipment control lever.
• Bank pin and bank cutting control piping.
• Parking brake cylinder and parking brake piping.
• Air horn piping, brake valve, air dryer (two variants) and air piping (four sections, with and without air dryer).
• Front frame (two serial variants), rear frame, articulate lubrication piping, hydraulic and air tank cover, engine hood and radiator grille (three variants), engine side panel, battery cover, transmission under guard.
• Operator’s compartment: floor frame and wire step (three variants including with air conditioner, with car heater and for pressure rise), seat bracket and control box (multiple variants), floor mat, operator’s seat (vinyl, fabric and fabric with suspension cover), seat stand, operator’s cab (eight sections covering cab, inside panel, door, glass, electrical system, window washer tank, accessory parts and lifting parts), door wiper, rear wiper, additional washer piping, beacon lamp, ROPS canopy (without and with cab), front weight and front weight for rear ripper.
• Air conditioner (seven sections) and car heater (four sections) for cold-climate machines.
• Fire extinguisher.
• Hydraulics: hydraulic pump (three sections with housing, cylinder block kit, main control valve assembly, trunnions, shafts, plates), hydraulic motor, swivel joint, hydraulic tank, hydraulic oil filter, hydraulic control valve (L.H. and R.H., 5-spool, both pre- and post-12023 variants with body assemblies, spools, springs, plugs, covers, O-rings, shims and seal kits), main relief valve, flow control valve, pilot check valves (blade lift L.H./R.H., articulate, drawbar side shift and leaning, power tilt, ripper).
• Cylinders: drawbar side shift, blade lift, blade side shift, power tilt and ripper cylinders with rods, pistons, heads, packings, seals, wipers, bolts and service kits.
• Hydraulic piping (many sections): tank to pump, pump to tank, pump to main relief valve, pump to flow control valve, flow control valve to control valve, main relief valve to control valve, control valve drain line, leaning cylinder line, articulate cylinder line, drawbar side shift cylinder line, blade lift cylinder line, blade side shift cylinder line, circle revolution motor line, power tilt cylinder line, ripper cylinder line.
• Blade accumulator piping and float blade piping.
• Drawbar (two serial variants), blade (multiple serial variants and with wide edge), circle support, blade lifter, circle reverse gear (multiple serial variants including worm gear set), extension blade and rear mount ripper with shanks, points and pins.
• Marks and plates: English, Spanish, Chinese and Russian text plate sets plus tables.
• Tool and tool box (wrenches, socket wrench set, driver, pliers, hammer, thickness gauge, bar, grease pump, tire gauge, tire inflation hose, leaning lock bolt and nut).
• Pre-maintenance parts and service kits (steering valve, brake valve, air dryer, flow control valve).

How the Parts Tables Work

Every illustration is paired with a numbered parts table. Each row carries the item number from the drawing, the Komatsu part number, the description, the quantity required and the serial-number options that apply. Where a part changed during production – and the GD825A-2 saw many running changes – the table splits the entry by serial range so you know which number your machine actually takes. Optional components (air conditioner versus car heater, tubed versus tubeless tires, hardened versus non-hardened pulleys, standard versus oversize shims) are all listed as separate options rather than being hidden behind a footnote.

Parts that are part of a larger assembly are shown with sub-item bullets and reference notes pointing to the corresponding figure in the book, so a mechanic looking at a clutch pack can see whether a disc is sold individually, as part of a plate assembly, or only as part of a kit. Gasket kits and seal kits are documented in their own sections with a full breakdown of every component the kit contains, which is the fastest way to see whether a kit covers what you need before you order it.

Who This Parts Book Is For

This is a working document for anyone who maintains, repairs or rebuilds a GD825A-2: fleet workshops, independent heavy-equipment mechanics, rebuilders sourcing obsolete numbers, and owners running their own grader. It is also the reference document of choice for parts counter staff and procurement departments, because the exploded views let you confirm the correct number and quantity before you place an order rather than after it arrives.

Serial Numbers and Coverage

The book is written around GD825A-2 S/N 11001-UP, with the engine content for S6D140E-2B S/N 23227-UP. Where the machine went through production changes, the book gives you the split point – for example the steering valve changes at 11009, the front frame has distinct early and later castings, hydraulic control valves changed at 12023, blade lift cylinders changed at 12103, and many smaller parts changed several times across the run. The parts tables show the exact serial ranges so you can match the number to your machine without guesswork.

Why a Correct Parts Book Saves Time and Money

Part numbers on a motor grader of this age change frequently. Bolts, seals, shims and small hardware may look identical between two machines but carry different numbers for different serial ranges – and the wrong number means a return, a delay and a second freight charge. This book removes that risk by showing the correct number, quantity and serial applicability for every item, and by grouping assemblies so you can see whether a component is part of a larger serviceable unit. Rebuilders especially benefit because the exploded views show assembly order and the parts tables confirm which shims, springs, discs and plates belong in a given stack-up.

Format and Delivery

The Komatsu GD825A-2 Motor Grader Parts Book PDF is delivered as a single PDF file that opens on any laptop, desktop, tablet or smartphone – no special software, no shipping, no waiting for a disc to arrive. It prints cleanly on standard paper and can be kept on a workshop tablet for use alongside the machine. Sections can be printed individually if a paper copy is needed at the bench, and the file can be stored alongside other service documentation for the machine.

What You Can Do With This Komatsu GD825A-2 Parts Book

Use it to look up the exact Komatsu part number for any component on the machine and order it against the correct serial range the first time. Rebuild a clutch pack, hydraulic cylinder or final drive with the correct seals, shims and plates in the correct order. Trace a hydraulic circuit through the pump, main relief valve, flow control valve, control valve and cylinders so you can identify which section of piping or which check valve needs attention. Verify the correct fastener, quantity and shim thickness for an assembly before you disassemble it, and confirm that a service kit actually contains the parts you need. Identify optional equipment for a specific serial range – air conditioner versus car heater, tubed versus tubeless tires, hardened versus non-hardened pulleys – and check which plates, guards and covers belong on your machine.

Whether you are working on an early machine or a late one, this parts book gives you the numbers and the drawings you need, on any device, at any time.

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