Komatsu HM250-2 Articulated Dump Truck Shop Manual SEN04733-04 – 2001 & Up Complete Repair Guide PDF

Description

Komatsu HM250-2 Articulated Dump Truck Shop Manual SEN04733-04 is the full workshop repair guide for machines from 2001 and up. This comprehensive manual covers every major system on the HM250-2, from the SAA6D125E-5 engine through the power train, brakes, steering, hydraulics, electrical system, and air conditioner. Whether you are performing scheduled maintenance, diagnosing a fault code, or rebuilding a component, this manual provides the procedures, specifications, and reference values needed to complete the work correctly.

File Details

• Manual Type: Shop Manual (Service, Repair, Troubleshooting)
• Brand: Komatsu
• Model: HM250-2 Articulated Dump Truck
• Serial Number: 2001 and up
• Document Number: SEN04733-04
• Language: English
• Page Count: 1,453
• File Format: PDF

Chapters Covered

• 00 Index and Foreword
• 01 Specification (100 Specification and Technical Data)
• 10 Structure, Function and Maintenance Standard
• 20 Standard Value Table
• 30 Testing and Adjusting
• 40 Troubleshooting
• 50 Disassembly and Assembly
• 60 Air Conditioner
• 90 Diagrams and Drawings

Specification and Technical Data

The specification chapter provides the full machine data for the HM250-2, including the specification drawings with overall dimensions, weight tables for major components, and the complete engine and power train ratings. It also includes the fuel, coolant, and lubricant recommendations with ambient temperature ranges and refill capacities. This is the reference section for confirming machine limits before any service work begins.

Structure, Function and Maintenance Standard

This is the largest technical reference in the manual, covering the engine and cooling system, power train (torque converter, transmission, drive shafts, axles, differentials, final drives), steering system, brake system, undercarriage and frame, hydraulic system, cab, and electrical system across three parts. Each section explains how the component works, then provides the maintenance standard values — standard sizes, tolerances, clearances, repair limits, and wear limits — used to judge whether parts can be reused or must be replaced. The power train section alone covers the torque converter, transmission clutch packs, ECMV operation, differential lock, and limited slip differential function in detail.

Standard Value Table

Separate standard value tables for engine and chassis give the new-machine reference values and service limit values used during testing, adjusting, and troubleshooting. This includes engine speed ranges, boost pressure, exhaust temperature, compression pressure, blow-by limits, oil pressure ranges, transmission clutch pressures, brake pressures, steering relief pressure, suspension cylinder pressures, and dump circuit pressures. These are the numbers you compare against when diagnosing performance complaints or checking wear.

Testing and Adjusting

Three parts cover the measurement and adjustment procedures for the whole machine. Part 1 covers engine-related tests: engine speed, intake air pressure, exhaust temperature and color, valve clearance adjustment, compression pressure, blow-by pressure, engine oil pressure, EGR valve and bypass valve drive oil pressure, fuel pressure, fuel return and leak amount, fuel circuit bleeding and leak testing, and belt tension adjustment. Part 2 covers power train and chassis adjustments: torque converter stall speed, power train oil pressures, transmission speed sensor adjustment, brake oil pressure, accumulator nitrogen gas charging, brake performance testing, wheel brake disc wear, parking brake pad wear, emergency parking brake release, steering circuit pressure, suspension cylinder adjustment, cab tilting, dump circuit pressure, and body positioner sensor adjustment. Part 3 covers equipment settings, machine monitor special functions, KOMTRAX terminal operation, and the Pm Clinic check sheet.

Troubleshooting

The troubleshooting section is extensive and organized by failure code, electrical system E-mode, hydraulic and mechanical system H-mode, and engine S-mode. The failure code chapters cover hundreds of specific codes for the transmission clutch systems, pressure control valves, engine control system sensors and injectors, CAN communication faults, solenoid output circuits, sensor signal faults, and mechanical protection codes. Each code entry describes the trouble, the controller action, the problem that appears on the machine, related information for diagnosis, possible causes, and the standard values or resistance/voltage measurements used to confirm the fault. The E-mode, H-mode, and S-mode sections provide symptom-based troubleshooting for problems that do not set a code.

Disassembly and Assembly

This chapter provides the removal, installation, disassembly, and assembly procedures for major components, with special tool lists, tightening torques, coating material callouts, and step-by-step instructions. Covered components include the fuel supply pump, fuel injectors, engine front and rear oil seals, cylinder head, engine assembly, radiator, cooling assembly, aftercooler, output shaft, transmission and front differential, torque converter, front and center differentials, rear differential, final drives and brakes, suspension cylinders, equalizer bar, hitch frame, flow amp valve, hoist valve, hydraulic cylinders, body, cab, cab glass, operator seat, air conditioner unit, and the electronic controllers. Each procedure includes the precautions, required tools, and torque values specific to the HM250-2.

Air Conditioner

The air conditioner section covers the structure and function of the refrigerating cycle, the air conditioner unit components, blower and intake unit, compressor, condenser, receiver drier, and control panel. It also provides testing and troubleshooting procedures, including self-diagnosis function checks, temperature control testing, vent mode changeover testing, Recirc/Fresh changeover testing, evaporator temperature sensor testing, relay testing, and gauge pressure troubleshooting. Refrigerant handling precautions and compressor oil procedures are included.

Diagrams and Drawings

The diagrams chapter contains the power train hydraulic circuit diagram, steering and hoist hydraulic circuit diagram, brake hydraulic circuit diagram, brake cooling hydraulic circuit diagram, and the complete electrical circuit diagrams for inside and outside the cab, plus the connectors table and arrangement drawing. These are the reference drawings used when tracing circuits, diagnosing hydraulic faults, or understanding system routing.

What This Manual Supports

This HM250-2 shop manual is built for the working technician. The troubleshooting chapters let you diagnose faults by failure code or by symptom, with the expected resistance, voltage, and pressure values spelled out for each test. The standard value tables give you the wear limits and clearances to judge used parts. The testing and adjusting procedures cover the measurements needed to verify system performance after repair. The disassembly and assembly chapters provide the torque sequences, special tools, and coating materials for major overhauls. And the hydraulic and electrical diagrams give you the circuit routing when you need to trace a problem through the machine.

For an articulated dump truck in commercial service, having the correct procedure and specification on hand matters. The HM250-2 carries a 24,000 kg payload and works in demanding conditions; incorrect assembly torque, overlooked wear limits, or a misdiagnosed fault can lead to repeat failures or extended downtime. This manual gives you the reference values and procedures to work to the manufacturer’s standard.

IMAGES PREVIEW

Delivered as an instant PDF download after payment. No shipping, no waiting. The file works on any device — laptop, tablet, or smartphone — and the pages can be printed for use in the workshop. Keep the complete HM250-2 shop manual on hand for service, repair, and troubleshooting across the full range of systems on this machine.