Komatsu WA1200-3 Wheel Loader Shop Manual SEBM018206 – Cummins QSK60

Description

Komatsu WA1200-3 Shop Manual SEBM018206

Issued by Komatsu under document number SEBM018206, this shop manual covers the WA1200-3 wheel loader from serial number 50001 and up. The WA1200-3 runs the Cummins QSK60 engine, and every procedure, pressure value and clearance in this book is written around that machine and that powerplant.

At roughly 1,065 pages, this is the full multi-chapter workshop reference: general data and specifications, structure and function of every major system, testing and adjusting with complete standard value tables, disassembly and assembly sequences, component wear limits and judgement standards, plus the hydraulic and electrical circuit diagrams at the back.

File Details

• Manual type: Shop Manual (workshop service and repair reference)
• Brand: Komatsu
• Machine model: WA1200-3
• Serial number range: 50001 and up
• Engine: Cummins QSK60
• Document number: SEBM018206
• Language: English
• Format: PDF
• Pages: Approximately 1,065
• Top-level chapters: 01 General, 10 Structure and Function, 20 Testing and Adjusting, 30 Disassembly and Assembly, 40 Maintenance Standard, 90 Others

Chapters Covered

• 01 General
  • General assembly drawing
  • Specifications
  • Weight table
  • List of lubricant and water
• 10 Structure and Function
  • Radiator and hydraulic oil cooler; damper
  • Torque converter, main relief valve, torque converter relief valve, torque converter regulator valve, ECMV
  • Transmission, transmission control valve, lubricating oil relief valve
  • Transfer, torque converter oil cooler, center support
  • Axle, final drive, axle mount, center hinge pin
  • Steering equipment arrangement, AJSS joystick steering, steering pump, switch pump, servo valve, steering demand valve, rotary valve, EPC valve, diverter valve
  • Brake equipment, brake valve, charge valve, accumulator, slack adjuster, brake, parking brake
  • Hydraulic equipment arrangement, work equipment lever linkage, hydraulic tank
  • Work equipment pump No. 1 and No. 2, PPC valve, PPC relief valve, main control valve, work equipment linkage
  • Air conditioner, machine monitor system, main monitor, CGC monitor
  • All-range electronic control automatic transmission (ATM) system
  • Modulated clutch (MOD/C) control, work equipment and joystick steering control
  • Engine starting, stopping and ether injection circuits
  • Electric parking brake control
  • VHMS Integrated Tool Soft
• 20 Testing and Adjusting
  • Standard value table for engine
  • Standard value table for chassis
  • Standard value table for electrical parts
  • Testing and adjusting procedures (engine, power train, steering, brake, hydraulic, work equipment, electrical)
  • Troubleshooting: engine controller (G mode), transmission controller (T mode), modulated clutch controller (MC mode), work equipment controller (J mode and W mode), main monitor (M mode), VHMS controller (V mode), hydraulic and mechanical (H mode)
• 30 Disassembly and Assembly
  • Standard tightening torque tables, precautions, coating materials, special tool lists and sketches
  • Engine mount, cooling system, fuel tank, air conditioner, damper
  • Control valve, torqflow assembly, converter assembly
  • Transmission assembly, transfer and parking brake assembly
  • Propeller shaft, front axle, rear axle, differential carrier
  • Final drive and brake assembly
  • Joystick and arm-rest, brake system, loader control
  • Frame, guard and hood, floor/platform support, console/dash
  • Hydraulic tank, steering hydraulic line, loader linkage
  • Kickout positioner, ROPS canopy, emergency steering
  • Steering cylinder, lift cylinder, dump cylinder, oil cooler
• 40 Maintenance Standard
  • Engine mount, transmission mount, damper
  • Torque converter, transmission, brake cooling and brake pump, input transfer, PTO
  • Modulated clutch, torque converter, transmission, transfer
  • Main relief and torque converter relief valve, torque converter regulator valve, by-pass fill valve, by-pass drain valve, ECMV, lubricating oil relief valve
  • Drive shaft, center support, differential, final drive, axle mount, center hinge pin
  • Steering pump, switch pump, steering demand valve, diverter valve, steering cylinder mount, emergency steering pump
  • Brake valve, slack adjuster, brake, parking brake
  • Work equipment pumps, PPC valve, PPC relief valve, pump control relief valve, main control valve
  • Hydraulic cylinder, bucket positioner, remote positioner, bucket linkage
• 90 Others
  • Transmission hydraulic circuit diagram
  • Brake circuit diagram
  • Work equipment hydraulic circuit diagrams
  • Electrical circuit diagrams

What the WA1200-3 Shop Manual Gives You

This is not a generic loader book with a WA1200-3 cover. Every procedure, clearance, pressure reading and torque figure inside belongs to this machine. The Structure and Function chapter explains how each assembly works before you touch it – the torque converter, the modulated clutch, the five-clutch planetary transmission, the articulated steering circuit, the wet-disc service brakes and the spring-applied parking brake built into the transmission. That understanding is the groundwork for the testing and adjusting work that follows.

The Testing and Adjusting chapter carries the standard value tables a technician actually uses: engine speeds, boost pressure, blow-by limits, exhaust gas colour, torque converter stall speed, hydraulic stall speed, and the full set of pressures for the transmission, steering, brakes, PPC circuit and work equipment relief. Alongside them sit step-by-step measuring procedures and the adjustment screws, shims and set pressures needed to bring a machine back inside its limits.

Troubleshooting is broken out controller by controller. The engine controller system, transmission controller system, modulated clutch controller system, joystick steering and work equipment controllers, main monitor, VHMS controller and the hydraulic and mechanical system each get their own flow charts and failure code tables. The codes are keyed to real symptoms, so a flashing fault on the monitor leads to a specific circuit or sensor rather than a guessing game.

The Disassembly and Assembly chapter is the working half of the manual. It walks through removing and refitting the converter, the transmission, the transfer and parking brake, the axles and differential carriers, the final drives, the cylinders, the frame, the loader linkage and the oil cooler – with tightening torques, special tool references and the assembly notes that keep a rebuilt component from failing on the first shift. The Maintenance Standard chapter then supplies the wear limits, clearances and component dimensions for judging every part you take off.

Machine Data Covered by This Manual

The specification chapter at the front of the manual lists the WA1200-3 operating data – operating weight around 205,200 kg with distribution split front and rear, a 20.0 cubic metre piled bucket capacity and 36,000 kg rated load, travel speeds through three forward and three reverse gears, 25 degree gradeability and a 12,000 mm minimum turning radius at the centre of the outside wheel. Flywheel output from the Cummins QSK60 is listed at 1,160 kW (1,558 HP) at 1,900 rpm, with maximum torque of 7,830 Nm at 1,500 rpm, high idling 2,050 rpm and low idling 650 rpm. The hydraulic section records the pump deliveries and set pressures for the steering valve, PPC valve and main control valve, plus the bore and stroke of the steering, boom and bucket cylinders.

Fluid and lubricant requirements, capacities and ambient temperature ranges are given in the general chapter. Filter, strainer and cooler circuits for the transmission, torque converter, brakes and hydraulic tank are covered in the Structure and Function and Others sections, with the circuit diagrams at the back tying them together.

Who This Manual Is For

Owners and fleet operators maintaining a WA1200-3 in service; heavy equipment mechanics working on the Cummins QSK60 and the machine’s power train; workshops carrying out a transmission, converter, axle or final drive rebuild; electricians and technicians diagnosing the monitor, controller and sensor networks. Because the manual covers both the mechanical assemblies and the electronic control systems, it suits a single technician working through a fault end to end, or a team splitting work across the machine.

IMAGES PREVIEW

Get the WA1200-3 Shop Manual – Instant PDF Download

With this Komatsu WA1200-3 wheel loader shop manual in hand you can carry out scheduled servicing, test and adjust the transmission, steering, brake and hydraulic circuits, diagnose controller faults from their codes, strip and rebuild the converter, transmission, transfer, axles and final drives, and judge worn components against the published limits. Correct torque values, correct pressures and correct clearances are what separate a repair that holds from one that comes back – and those numbers live in this manual.

The manual is delivered as an instant PDF download after payment. There is no physical book to ship and no waiting. Open it on a laptop in the workshop, on a tablet at the machine, or print the pages you need for the job in front of you. Keep a copy on every device your team uses.