Komatsu WA320-5 Wheel Loader Operation & Maintenance Manual – PEN00575-00 (2011)

Description

Komatsu WA320-5 Wheel Loader Operation & Maintenance Manual

This is the complete Operation & Maintenance Manual for the Komatsu WA320-5 wheel loader, covering machines from serial number 62038 and up. Published under document number PEN00575-00, this 2011 manual is the definitive reference for operators, maintenance personnel, and technicians who need factory procedures, specifications, and safety information in one place.

Whether you are performing daily checks, scheduling periodic maintenance, troubleshooting a fault code, or looking up a tightening torque, this WA320-5 operation and maintenance manual provides the exact information required for the SAA6D102E diesel engine and the machine’s hydraulic, electrical, brake, steering, and drivetrain systems.

File Details

• Manual Type: Operation & Maintenance Manual
• Brand: Komatsu
• Model: WA320-5 Wheel Loader
• Serial Numbers: 62038 and up
• Document Number: PEN00575-00
• Publication Date: 2011 (03-11)
• Language: English
• Page Count: 261
• File Format: PDF

Chapters Covered

• Foreword — Manual storage, safety warnings, and general information
• Safety Information — Signal words, safety labels (word and pictogram types), and general safety rules
• Safety Labels — Location and content of all safety labels on the machine, including warnings for electrical hazards, moving parts, hot coolant, hot oil, battery handling, and high-pressure systems
• General Precautions — Safety rules, clothing and personal protective equipment, fire extinguisher and first aid, machine cleanliness, handrails and steps, mounting and dismounting, prevention of burns, fire prevention, ROPS precautions, and worksite safety
• Precautions for Operation — Starting engine, checks before starting, cold area precautions, checks before operation, travel precautions (forward/reverse, slopes), prohibited operations, brake usage, snow operation, parking, transportation, battery hazards, booster cable starting, and towing
• Precautions for Maintenance — Warning tags, workplace cleanliness, stopping engine before maintenance, two-worker rule for engine-running maintenance, proper tools, accumulator handling, work under machine, noise, hammer use, welding, high-pressure oil, waste materials, air conditioner, compressed air, periodic replacement of safety critical parts, and tire handling
• Operation — Machine monitor system, warning types, emergency stop items, caution items, inspection and maintenance items, pilot display, gauges (HST oil temperature, engine coolant temperature, fuel, speedometer), speed range selector, variable shift control, traction control, E.C.S.S., lamp switch, turn signal, dimmer, horn, hazard lamp, working lamp switches, monitor panel mode selectors, wipers, cigarette lighter, room lamp, directional lever, work equipment lock lever, lift arm control lever, bucket control lever, brake pedal, accelerator pedal, parking brake lever, steering tilt lock, caps and covers with locks, frame lock bar, towing pin, grease pump, cab door locks, fuses, slow blow fuse, power outlet, storage box, AM/FM radio, cassette stereo, air conditioner, coolbox, cab wiper handling, KOMTRAX, walk-around checks, checks before starting engine, seat adjustment, seat belt, mirror adjustment, starting engine (normal and cold), breaking-in, operations and checks after starting, stopping engine, moving the machine, turning, operation of work equipment, work possible using wheel loader (digging, loading, leveling, pushing, load and carry), precautions for operation, permissible water depth, driving up/down slopes, adjusting work equipment posture, boom kickout, bucket level indicator, parking machine, checks after completion, locking, handling tires, transportation, loading/unloading, lifting machine, cold weather operation, long-term storage, and troubleshooting
• Maintenance — Guides to maintenance, outlines of service, handling oil/fuel/coolant and oil clinic (KOWA), outline of electric system, wear parts list, recommended fuel/coolant/lubricant, standard tightening torques for bolts and nuts, torque list, periodic replacement of safety critical parts, maintenance schedule chart, and service procedures (initial 250 hours, every 50/100/250/500/1000/2000/4000 hours)
• Specifications — Operating weight, bucket capacity, engine model, flywheel horsepower, dimensions, travel speeds, turning radius, and permissible towing load
• Attachments, Options — Selecting bucket and tires, method of using 3 levers
• Index — Alphabetical index for quick reference

This Komatsu WA320-5 service manual covers the complete machine in extraordinary detail. From the engine oil pan capacity and filter replacement intervals to the brake disc wear check and accumulator function test, every procedure is written with the technician in mind. The maintenance schedule chart alone walks you through every interval — 50, 100, 250, 500, 1000, 2000, and 4000 hours — with references to the exact page for each task.

The troubleshooting section is particularly valuable. It breaks down problems by system — electrical, HST, axle, brake, parking brake, steering, hydraulic system, and engine — with main causes and remedies for each symptom. If the machine won’t move, the bucket lacks lifting power, the steering is heavy, or the engine coolant temperature gauge is in the red range, this manual tells you where to look first.

For the engine itself, the manual covers the SAA6D102E diesel engine with detailed specs, valve clearance adjustment notes, turbocharger inspection, alternator and starting motor checks, and the correct oil and fuel types for different ambient temperatures. The cooling system section includes the coolant density table for Komatsu Supercoolant (AF-NAC), covering concentrations from 30% to 64% depending on minimum temperatures from above -10°C down to -50°C.

Hydraulic system coverage includes the HST oil filter element replacement, hydraulic tank oil change, hydraulic filter element replacement, and the air bleeding procedure after service. The brake system section covers brake disc wear checking with the gauge procedure, brake circuit strainer cleaning, and accumulator function testing. Steering system coverage includes the emergency steering pilot lamp operation and steering hydraulic circuit warm-up in cold weather.

The electrical system chapter provides fuse box layouts with fuse capacities and circuit names for both fuse box A and fuse box B, slow blow fuse ratings and locations, battery removal and installation with tightening torques, charging precautions, and booster cable starting procedures with the correct connection order.

Why This Manual Matters

Komatsu designed the WA320-5 for digging, smoothing, pushing, and loading work. Getting the correct operating procedures and maintenance intervals right is not optional — it directly affects machine life, fuel consumption, tire wear, and safety. This WA320-5 wheel loader manual gives you the exact procedures and specifications that Komatsu published, not generic advice.

When you are adjusting boom kickout, setting bucket positioner, checking brake disc wear, bleeding the fuel system after a filter change, or diagnosing an action code on the machine monitor, you need the real numbers and steps. This manual has them.

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Instant PDF Delivery

You get instant access to the complete Komatsu WA320-5 Operation & Maintenance Manual as a PDF download after payment. No shipping, no waiting. The file works on any device — laptop, tablet, or smartphone — and you can print any page you need for the workshop. Keep it on your phone for quick reference in the cab, or print the maintenance schedule chart and hang it on the shop wall.