Komatsu D61EX-23 D61PX-23 Bulldozer Shop Manual SEN06010-02 – PDF Workshop Repair Guide
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Complete Komatsu shop manual for D61EX-23 and D61PX-23 bulldozers (serial 30001 and up) covering the SAA6D107E-2 engine, HST power train, hydraulics, undercarriage, electrical systems, testing and adjusting, troubleshooting and full disassembly procedures.
Description
Komatsu D61EX-23 and D61PX-23 Bulldozer Shop Manual
This is the Komatsu shop manual for the D61EX-23 and D61PX-23 bulldozers, published under form number SEN06010-02. It covers machines from serial number D61EX-30001 and up and D61PX-30001 and up, and it is the same body of technical information a workshop needs to service, test, diagnose and rebuild these dozers. The manual spans ten chapters, moving from general specifications and safety through system theory, standard values, testing and adjusting, troubleshooting by failure code, full disassembly and assembly procedures, maintenance standards and the hydraulic and electrical circuit diagrams.
File Details
- Manual type: Shop Manual (Workshop / Service Manual)
- Brand: Komatsu
- Models covered: D61EX-23, D61PX-23 bulldozers
- Engine covered: Komatsu SAA6D107E-2 diesel engine
- Serial numbers: D61EX-30001 and up, D61PX-30001 and up
- Language: English
- File format: PDF
- Document number: SEN06010-02
- Page count: 1,724 pages
Chapters Covered
- 00 Index and foreword – index, foreword, safety and general information, important safety notice, how to read the shop manual, explanation of terms for maintenance standard, handling equipment of fuel system devices, handling of intake system parts, handling of hydraulic equipment, method of disconnecting and connecting push-pull type coupler, handling of electrical equipment, how to read electric wire code, precautions when performing operation, practical use of KOMTRAX, standard tightening torque table, list of abbreviation, conversion table
- 01 Specification – specification drawing, specifications, weight table, table of fuel, coolant and lubricants
- 10 Structure and function – engine and cooling system, engine related parts, KVGT, EGR system piping drawing, EGR system circuit diagram, EGR valve, EGR cooler, KCCV layout drawing, KCCV ventilator, KDPF, cooling system, cooling fan motor, oil cooler bypass and HST charge safety valve, power train, damper, hydraulic component layout of HST, steering and brake control, HST pump, HST motor, charge pump, solenoid valve, final drive, undercarriage and frame, main frame, suspension, track frame and idler cushion, hydraulic system, work equipment control system, hydraulic tank, CLSS, work equipment and cooling fan pump, control valve, ripper PPC valve, quick drop valve, angle control EPC valve, accumulator, work equipment, blade, ripper, piston valve, cab and its attachments, ROPS cab, cab mount, electrical system, engine control system, cooling system control system, HST control system, parking brake control system, system operating lamp function, battery disconnect switch function, machine monitor system, KOMTRAX system, system component parts, sensor
- 20 Standard value tables – standard service value table, standard value table for engine, standard value table for machine, standard value table for electrical system
- 30 Testing and adjusting – engine and cooling system testing, power train testing and adjusting, undercarriage and frame, hydraulic system, work equipment, electrical system, special functions of machine monitor, adjustment methods after controller replacement, Pm Clinic
- 40 Troubleshooting – troubleshooting by failure code, electrical system troubleshooting (E-mode), hydraulic and mechanical system troubleshooting (H-mode), engine troubleshooting (S-mode)
- 50 Disassembly and assembly – engine and cooling system, power train, undercarriage and frame, hydraulic system, work equipment, cab and its attachments, electrical system
- 60 Maintenance standard – engine and cooling system, power train, undercarriage and frame, hydraulic system, work equipment, cab and its attachments, electrical system
- 80 Appendix – air conditioner components, refrigeration cycle, testing and troubleshooting, electrical circuit diagram, system diagram, troubleshooting charts
- 90 Diagrams and drawings – hydraulic circuit diagram, symbols in hydraulic circuit diagram, electric circuit diagram, symbols in electric circuit diagram
What makes this manual useful is the way the ten chapters work together as one continuous service reference. The specification chapter establishes the baseline, the structure and function chapter explains how each system on the D61EX-23 and D61PX-23 actually works, and the standard value tables give the measurements a technician compares against. From there, the testing and adjusting chapter tells you how to take those measurements with the correct tools and conditions, the troubleshooting chapter tells you what a given failure code or symptom points to, and the disassembly and assembly chapter walks the component apart and back together with tightening torques and coating materials. The maintenance standard chapter supplies the wear limits and repair limits to judge whether a part goes back in service, and the hydraulic and electrical circuit diagrams close the loop. Everything is tied to the D61EX-23 and D61PX-23 specifically, including the SAA6D107E-2 engine, the HST drive system, the CLSS work equipment hydraulics and the KDPF exhaust aftertreatment.
What This Shop Manual Lets You Do
With the Komatsu D61EX-23 / D61PX-23 shop manual in hand, the job range is wide. You can set valve clearance, measure compression pressure, check blowby pressure, verify engine oil pressure, test boost pressure and read exhaust gas color. On the power train side, you can test and adjust HST oil pressure, verify solenoid valve output pressures, check that the machine travels straight and run a simple brake performance test. The hydraulic chapter supports work equipment oil pressure testing, control circuit source pressure checks, work equipment and fan EPC valve output pressure testing, hydraulic drift isolation and internal cylinder leakage measurement. Undercarriage work is covered too, from idler clearance adjustment and sprocket wear checking to track tension setting. In the electrical chapter, the machine monitor service mode gives access to monitoring, abnormality records, maintenance settings, diagnostic tests, regeneration for service and the full adjustment menu used for calibration after components are replaced.
Repair and Rebuild Coverage
The disassembly and assembly chapter is the practical heart of the manual for anyone pulling a D61EX-23 or D61PX-23 apart. It covers the supply pump, fuel injectors, cylinder head, radiator, aftercooler, hydraulic oil cooler, cooling fan drive and motor, engine assembly, damper, engine front and rear oil seals, engine hood, fuel tank, KDPF, KCCV, KVGT, EGR cooler and EGR valve. It continues into the HST pump, HST motor and final drive, the full track frame and undercarriage group including idler, recoil spring, track roller, carrier roller, segment teeth and the track shoe assembly both in the standard and PLUS types. Hydraulic tank, control valve and hydraulic cylinder disassembly are included, as are work equipment, blade, U-frame, ROPS cab, operator’s cab glass, seat, seat belt, foot heater, air conditioner unit and compressor, machine monitor, engine controller, HST controller, mass air flow and temperature sensor, and the KOMTRAX terminal. Tightening torques, special tools and coating materials are given at each procedure.
Why the Correct Specifications Matter
Bulldozers live or die by their adjustments. An HST main circuit pressure outside the 40.2 to 44.1 MPa band, a charge circuit pressure that drifts, a cylinder leaking internally past its limit or a track tensioned wrong all show up as poor performance, premature wear or a machine that will not hold a grade. The standard value tables and maintenance standard chapter in this manual give the numbers and the wear limits so a repair is judged on measurement rather than guesswork, and the troubleshooting chapters give a defined path from symptom to cause instead of part swapping.
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