Komatsu D51EX-22 D51PX-22 Parts Book PDF – SAA6D107E-1 Parts Catalog KEPB023312

Description

Komatsu D51EX-22 & D51PX-22 Parts Book — Form No. KEPB023312

This is the complete Komatsu parts book for the D51EX-22 and D51PX-22 crawler dozers fitted with the SAA6D107E-1 diesel engine. Published under Form No. KEPB023312, it is the reference used to identify and order every serviceable component on these machines, from a single O-ring in the fuel system right through to complete hydraulic pump sub-assemblies and final drive assemblies. Each figure pairs an exploded illustration with a matching parts list so the item number on the drawing leads straight to a part number, description, and quantity.

Coverage begins at engine serial number 30910419 and up, and machine serial number B10001 and up, so the catalog stays accurate across the production run of the D51EX-22 and D51PX-22 as it evolved. Both models share this catalog, which means the sections that differ — steering clutch and final drive configurations, track shoes, blade groups, and hydraulic line routing — are laid out separately so you pick the correct variant for your serial number.

File Details

• Manual type: Illustrated Parts Book / Parts Catalog
• Brand: Komatsu
• Models covered: D51EX-22, D51PX-22
• Engine: SAA6D107E-1
• Serial number coverage: Engine SN 30910419 and up; Machine SN B10001 and up
• Document number: KEPB023312
• Language: English
• Page count: 542 pages
• File format: PDF
• Publication date: February 2013
• Publication origin: Printed in Brazil

Chapters Covered

The parts book is organised into the following major groups. Each group contains several exploded figures with corresponding numeric parts lists.

• Engine — Cylinder Head Group: Cylinder head, rocker lever assembly, valve cover, crankcase breather, exhaust manifold, air intake connection, air intake manifold, cylinder block, gear cover, rear gear housing, flywheel and mounting, oil pan, vibration damper, crankshaft, connecting rod and piston, valve tappet, camshaft, engine oil filler and oil level gauge bracket
• Engine — Turbocharger & Fuel: Turbocharger oil piping, turbocharger kit and mounting, fuel injection piping, fuel injector, fuel injector connector covers, fuel filter, fuel filter piping, fuel pump and mounting
• Engine — Lubrication & Cooling: Lubricating oil pump, lubricating oil cooler, lubricating oil filter, water pump, coolant inlet connection, thermostat and coolant connection, fan drive, belt tensioner
• Engine — Electrical & Assembly: Starting motor mounting, starting motor 5.5 kW, engine control module, wiring harness, flywheel housing, engine lifting bracket, engine assembly
• Engine Accessories: Air cleaner unit, air cleaner group, air cleaner hose group, air cleaner band group, pre-cleaner assembly (ejector type and bowl type), rain cap assembly
• Exhaust System: Exhaust and muffler group, muffler group, exhaust stack, exhaust cover, muffler drain
• Engine Mounting & Lines: Engine oil pan drain line, engine mounting brackets, crankcase breather mount group, crankcase breather line, engine cushion mounts, fuel filter bracket, belt guards, heat shield, alternator group
• KOMTRAX / 3D Navigator: 3D Navigator wiring and controller groups split by machine serial ranges
• Cooling System: Heat exchanger, heat exchanger seals, mounting brackets, coolant recovery tank, fan group and fan speed sensor, fan guards, radiator shroud, air charger cooling lines, engine coolant lines, fan supply and return lines
• Fuel Tank & Related Parts: Fuel tank, fuel tank cover, fuel level sensor, fuel tank mounting, fuel line piping, fuel lines, fuel pre-filter, fuel lines and filter with water separator
• Electrical System: Batteries, electrical wiring battery cables, battery disconnect switch, engine wiring harness, chassis wiring harness, nose guard wiring harness, back-up alarm
• Power Train & Final Drive: Final drive hub and planetary gear (LH and RH), final drive carrier assembly (LH and RH), final drive travel motor and teeth (LH and RH), final drive mount
• Hydraulic System: Hydraulic oil tank assemblies (multiple serial ranges), tank access covers and mounting hardware, hydraulic control valve (4-spool and 5-spool), elbows and connectors, hydraulic pump, HST pump assembly, fan pump, charge pump, HST motors, fan motor, PPC valve, relief valve, electric lever assembly, quick drop valve, hydraulic pump lines, charge line, suction line, work equipment line, drain lines, HST travel line, PPC lines, motor control hoses, motor elbow group, solenoid valve and accumulator, oil cooler by-pass valve, dozer lines, lift cylinder lines, angle cylinder lines, tilt cylinder lines, ripper lines, ripper cylinder and hoses, rear hydraulic lines for rescue winch
• Main Frame & Related Parts: Main frame, main frame mounting, equalizer bar, pivot shaft, suspension lubrication and pins
• Operator’s Compartment & Control System: Operator seat (reclining and air suspension variants, fabric and leather), seat belt, cab complete assembly, cab door and latch (LH and RH), door bumper and window, door open lock, front and rear window glass and seals, window glass and sash (LH and RH), roof mounted air conditioner unit, air conditioner unit assembly (multiple serial ranges), air conditioner and heater piping, condenser assembly, mounting brackets, wiring harness, under seat heater, door wiper (LH and RH), door mounting hardware, cab electrical, window washer hoses, radio, cassette, inside cover, rear view mirror, plugs and outside seals, A/C duct, A/C cover, fuel control, travel control, travel lock lever, blade control, blade lock lever, rear attachment cover, console, brake pedal, decelerator pedal, controller, wiring harness for controls, battery relay and relay box, dashboard and switches, dashboard wiring, dashboard panel mount, floor cover, arm rest, KOMTRAX, work lamps, floor mat, ROPS complete assembly, ROPS inside cover, mirror, plugs, rear cover, sub heater, fuel control, travel control, blade control, brake pedal, decelerator pedal, controller, wiring harness, battery relay, dashboard, floor cover, arm rest, KOMTRAX, work lamps, vandalism protection instrument panel, air conditioner lines, drive belt and mounting, heater joint group, heater hose piping, extinguisher, blade PPC piping group, floor mount suspension, ripper control unit, ripper control group, ripper PPC piping group, winch control for rescue, handrail group, window washer hose group, window washer tank mounting, window washer wiring, window washer tank
• Guard & Related Parts: Radiator guard and grille, radiator guard gas spring, engine hood, front engine hood door, LH side engine hood door, engine hood mounting, engine hood with noise panels, LH side engine hood door with noise panel, rear cover
• Undercarriage: Idler assembly, idler cushion, track roller (single and double, standard and plus type), track roller plate, carrier roller (standard and plus type), track link assembly (single grouser, lubricated, abrasion resistant, swamp type, plus type), track shoe (D51EX — 510 mm, 560 mm, abrasion resistant, with hole variants; D51PX — 710 mm, 720 mm swamp, with hole, abrasion resistant), track frame, track frame cover (EX and PX model), track frame roller guards, full roller guard model, shoe bolt and nut service kit
• Work Equipment: Dozer frame, blade link group, center ball, cylinder pins, pitch rod (fixed, fixed long, adjustable), blade unit wide, blade group wide, cutting edge group wide, blade unit narrow, blade group narrow, cutting edge group narrow, blade (power angle power tilt dozer), lubrication group, dozer line guards, ripper group, long drawbar group, hitch
• Marks & Plates: Five-part marks and plates set (English, Japanese, Portuguese, Spanish variants), ROPS plate for Germany and Spain
• Accessory: Tool box
• Numerical Index: Full part-number-to-figure index covering the entire catalog

The manual opens with illustrated parts-book conventions — how item numbers on an illustration tie to the parts list, how indentation in the Description column marks a component of the assembly above it, and what the footnote and reference markers mean. From there the catalog is arranged system by system. Engine coverage carries right through from cylinder head castings, camshaft and valve train parts, through turbocharger mounting kits, fuel injection piping, and the electronic control module. The cooling section covers everything from the heat exchanger core and seals to the fan motor and radiator shroud. The electrical section lists batteries, cables, disconnect switch, and every wiring harness. Power train coverage breaks out the final drive hub, planetary gear, carrier, and travel motor for each side separately, so LH and RH parts never get mixed. The hydraulic section alone spans more than thirty figures covering the HST pump sub-assemblies, control valve blocks, spool assemblies, PPC valve inner parts, cylinder line routing, and every hose, elbow, union, and O-ring in the circuit. Operator compartment coverage is enormous, covering both cab and ROPS variants, air suspension and fabric seats, A/C and heater piping with condenser and evaporator internals, all controls, pedals, wiring harnesses, and dashboards across serial-number breaks. Undercarriage is fully covered for both D51EX and D51PX track configurations. Work equipment ends with blade groups, cutting edges, ripper components, drawbar, and hitch.

Every figure is drawn as an exploded view so you can see how the parts actually stack and interact. Where a component was changed mid-production, the catalog lists the superseded part number alongside the current one, together with the serial break at which the change took effect. Where a part is only available as part of a kit or an assembly, that is marked in the reference column. Where an item is no longer serviced separately, that is called out too. The result is a document that tells you not just what a part number is, but whether your serial number takes the old version or the new one.

What This Parts Book Lets You Do

With this catalog open you can identify any externally mounted or internally assembled component on the D51EX-22 or D51PX-22 by figure and item number, match it to a Komatsu part number, and confirm the correct quantity before you order. Servicing the SAA6D107E-1 engine becomes a straightforward exercise in cross-referencing — camshaft bearings, valve tappets, piston sub-assemblies, turbocharger mounting hardware, oil cooler gaskets, and fuel injector supply tubes are all laid out with the surrounding hardware shown. On the hydraulic side, when a control valve spool, PPC valve spring, charge pump seal kit, or relief valve assembly needs replacing, the exploded views show exactly how each piece fits inside its block or body, so you can order the correct sub-component instead of an entire assembly. Undercarriage work benefits from the exploded track link, track shoe, roller, and idler figures, letting you spec individual bushings, pins, seals, and collars rather than complete roller assemblies if that is what the job actually needs.

Getting the right part the first time saves downtime. A dozer sitting idle because the wrong O-ring arrived, or a serial-number break was missed, costs far more than the parts themselves. This catalog removes that risk — every part number is tied to a specific figure and a specific serial-number range, and supersessions are listed so you know what your machine takes today, not just what it left the factory with. The air conditioner, cab, electrical, and control sections extend that same accuracy to the operator environment, so a wiper motor, a heater hose, a starter relay, or a PPC lever assembly can all be ordered without guesswork.

IMAGES PREVIEW

The file is delivered instantly as a downloadable PDF after checkout — no shipping, no waiting. It opens on any laptop, tablet, or phone and can be printed page by page for use in the workshop. Zoom into any exploded view on screen to read the item number, or print the specific figure you need and take it to the machine. Whether you run a single D51EX-22 or a fleet of D51PX-22 dozers, this is the reference that keeps the parts ordering process accurate.