Komatsu D275A-2 Shop Manual – Crawler Dozer Service, Repair & Maintenance PDF

Description

The Komatsu D275A-2 Shop Manual is the complete service, repair and maintenance reference for the D275A-2 crawler dozer, covering machines from serial number 10001 and up. It has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing the correct way to perform repairs and make judgements. The manual is issued as a guide to carrying out repairs and is divided into chapters covering general information, structure and function, testing and adjusting, disassembly and assembly, and maintenance standards. The D275A-2 mounts the S6D170-1 and S6D170-2 engine; for details of the engine, see the 6D170-1 Series and 6D170-2 Series Engine Shop Manual. This Komatsu D275A-2 service manual may contain attachments and optional equipment that are not available in your area — please consult your local Komatsu distributor for those items you may require.

File Details

• Manual type: Shop Manual
• Brand: Komatsu
• Model: D275A-2
• Engines covered: S6D170-1, S6D170-2
• Serial numbers: 10001 and up
• Language: English
• Page count: 652 pages
• File format: PDF

Chapters Covered

• 01 GENERAL
• 10 STRUCTURE AND FUNCTION
• 20 TESTING AND ADJUSTING
• 30 DISASSEMBLY AND ASSEMBLY
• 40 MAINTENANCE STANDARD

01 GENERAL

The opening chapter gives the general assembly drawing, full machine specifications, a component weight table for transporting and handling, and the table of fuel, coolant and lubricants with ambient temperature ranges and capacities. It is the quick-reference starting point for anyone working on the D275A-2, listing operating weight, travel speeds, ground pressure, dimensions, engine performance, torque converter, transmission, steering, final drive and undercarriage data.

10 STRUCTURE AND FUNCTION

This chapter explains the structure and function of every major component and doubles as reference material for troubleshooting. It covers the power train unit, damper and universal joint, torque converter and PTO, torque converter valve, TORQFLOW transmission, transmission control and control valve, lubrication relief valve, scavenging pump, oil strainer, power train and lubrication oil filters, steering unit, transfer and bevel pinion, bevel gear, steering clutch and brake, steering control valve, final drive, main frame, track group, recoil spring, suspension, hydraulic piping, blade and ripper hydraulics, hydraulic control valves, hydraulic circuit diagrams, hydraulic tank, piston valve, quick drop valve, semi U-dozer, ripper, pin-puller solenoid valve, chassis and cab electrical circuit diagrams, EVMS (Electrical Vehicle Monitoring System), APS control system and torque converter lock-up control system.

20 TESTING AND ADJUSTING

The testing and adjusting chapter gives the standard value tables for engine, chassis and electrical judgement, the table of tools for testing, adjusting and troubleshooting, and the full procedures for belt tension, valve clearance, compression pressure, blow-by, fuel injection timing, exhaust colour, engine oil pressure, engine speed, boost pressure, exhaust temperature, fuel control linkage, gear shift lever linkage, steering clutch linkage, brake pedal linkage, work equipment control linkage, idler clearance, torque converter stall speed, power train oil pressure, work equipment main relief pressure, bleeding air from hydraulic cylinders and checking hydraulic drift. The troubleshooting charts correlating problems to causes are also included in this section.

30 DISASSEMBLY AND ASSEMBLY

This chapter explains the order to be followed when removing, installing, disassembling or assembling each component, along with the precautions to be taken for these operations. It covers the starting motor, alternator, engine oil cooler, torque converter oil cooler, fuel injection pump, water pump, turbocharger, nozzle holder, cylinder head, fuel tank, radiator and front guard, engine, damper, power train unit, PTO and torque converter, TORQFLOW transmission, steering case, steering clutch and brake, transfer gear housing, torque converter valve, transmission control valve, steering control valve, scavenging pump, power train pump, final drive, track frame, idler yoke, recoil spring, idler, track roller, carrier roller, track shoe, pivot shaft, equalizer bar, suspension cushion, segment tooth, hydraulic pump, blade lift valve, blade tilt and ripper low valve, ripper high valve, hydraulic cylinders, work equipment, ripper, ROPS guard, operator’s cab, floor frame and more.

40 MAINTENANCE STANDARD

The maintenance standard chapter gives the judgement standards used when inspecting disassembled parts. It lists the standard size, tolerance, standard clearance, clearance limit, repair limit and remedy for engine mounts, power train mounts, damper and universal joint, torque converter, torque converter valve, transmission, transmission control valve, power train and lubricating pump, transfer and bevel pinion, bevel gear shaft, steering clutch and steering brake, steering control valve, final drive, main frame, track frame, recoil spring, idler, track roller, carrier roller, track, suspension, hydraulic pump, blade lift control valve, main relief valve and shuttle valve, blade tilt control and ripper low valve, ripper high valve, hydraulic cylinders, quick drop valve, cylinder stay, semi U-dozer, cutting edge and end bit, and the variable multiple shank and variable giant ripper.

What This Komatsu D275A-2 Repair Manual Enables You to Do

This D275A-2 shop manual PDF supports the full range of workshop jobs on the machine — from routine belt tension checks and valve clearance adjustments through to complete power train removal, torque converter overhaul, transmission disassembly, steering clutch and brake rebuild, final drive service, undercarriage inspection and hydraulic valve repair. Because the manual gives both the procedures and the judgement values, it lets a technician confirm whether a component is within limits or must be replaced, rather than guessing. The troubleshooting charts in the testing and adjusting chapter help correlate symptoms to probable causes, so diagnosis moves faster and parts are not replaced unnecessarily.

Why the Correct Procedures and Specifications Matter

Heavy crawler dozers operate under continuous load, and mistakes in assembly torque, hydraulic pressure settings, clutch clearances or bearing preload can lead to premature failure, oil leaks, or damage to the final drive and transmission. Having the manufacturer’s own testing and adjusting values, maintenance standards and tightening torques on hand is what separates a repair that lasts from one that comes back. The manual also documents the safety precautions that apply to every operation — from blocking the machine and releasing hydraulic pressure to handling heavy components with a hoist — so the work is carried out safely as well as correctly.

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Instant PDF Delivery

This Komatsu D275A-2 crawler dozer shop manual is delivered as an instant PDF download after payment — no shipping, no waiting for a physical book. The file can be viewed on any device, from a workshop laptop or tablet to a smartphone, and pages can be printed for use at the machine or kept in the shop binder. Whether you are a professional technician, a fleet maintenance manager, or an owner-operator maintaining your own D275A-2, this PDF gives you the complete service, repair and maintenance information in one place.