Komatsu WA320-3H(S/N WA320H20051-WA320H20560)
Komatsuwheel loadermedium (wa140 - wa380)

Komatsu WA320-3H(S/N WA320H20051-WA320H20560)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu WA320-3 is a mid-size wheel loader designed for loading sand, gravel, and dirt into conveyors, hoppers, and dump trucks. This series features a turbocharged engine and a 4-speed transmission, providing high breakout force for material handling tasks. The machine operates within a weight class typically ranging around 14,000 kg (30,754.5 lb) depending on specific configuration and attachments.

Evolution across the WA320 series has focused on integrating advanced telematics like KOMTRAX and enhanced emissions control via Tier 4 technology. The machine remains a staple in the used parts market due to its robust powertrain and the availability of Komatsu Genuine Lubricants. Its reliability in high-duty cycles makes it a primary target for fleet owners seeking durable, mid-range earthmoving capacity.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Komatsu WA320-3H(S/N WA320H20051-WA320H20560) specifications

Engine

Engine ModelS6D108 (varies by configuration)
Gross Power162.3 hp
Cylinders6
Displacement436.4 cu in

Weights

Operating Weight29,431.8 lb
Static Tipping Weight25,198.9 lb (standard configuration); 24,559.5 lb (Active+ configuration)

Dimensions

Length With Bucket On Ground24.51 ft (standard); 24.32 ft (custom configuration); 24.14 ft (Active+ configuration)
Width Over Tires8.31 ft (standard); 8.49 ft (custom configuration); 8.46 ft (Active+ configuration)
Height To Top Of Cab10.65 ft (standard); 10.95 ft (custom configuration); 10.9 ft (Active+ configuration)
Wheelbase9.95 ft
Ground Clearance1.09 ft (standard); 1.32 ft (custom configuration); 1.24 ft (Active+ configuration)
Hinge Pin - Max Height12.52 ft (standard); 12.75 ft (custom configuration); 12.72 ft (Active+ configuration)
Reach At Max Lift And Dump3.63 ft (standard); 3.4 ft (custom configuration); 3.49 ft (Active+ configuration)
Dump Clearance At Max Raise9.13 ft (standard); 9.36 ft (custom configuration)

Performance

Max Speed - Forward21.2 mph
Max Speed - Reverse21.8 mph
Turning Radius20 ft
Breakout Force27,600 lb (standard); 28,326 lb (Active+ configuration)
Bucket Capacity - Heaped3.54 yd³
Bucket Capacity - Struck3.01 yd³

Service capacities (summary)

Fuel Tank58.4 gal (standard); 52.9 gal (custom configuration)
Engine Oil6.1 US gal

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

WA320-3H(S/N WA320H20051-WA320H20560) fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)23 L (6.1 US gal)EO (Engine Oil); verify with dealer for specific viscosity requirements based on climate
Cooling system35.1 L (9.3 US gal)Komatsu Super-coolant AF-NAC
Fuel tank245 L (64.7 US gal)Diesel Fuel
Transmission/powertrain compartments5.8 L (1.5 US gal) for transfer caseKomatsu Powertrain Oil
Axles/differentials27 L (7.1 US gal) front axle; 25.5 L (6.7 US gal) rear axleAXO (Axle Oil)
Hydraulic system and tank92 L (24.3 US gal)HO (Hydraulic Oil)
GreaseNot specifiedG (Lithium Grease No. 2)

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Komatsu WA320-3H(S/N WA320H20051-WA320H20560) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Verify hydraulic fluid level via sight glass
  • Inspect coolant level and cap security
  • Drain water from fuel/water separator
  • Monitor DEF levels for Tier 4 compliance
  • Check air filter restriction indicator
Every 250 h
  • Change engine oil and filter
  • Grease all points including bucket, Z-bar/linkage, steering, and axle
  • Inspect air filter outer element
  • Check belt and hose condition
  • Perform visual walk-around inspection
Every 500 h
  • Replace fuel filter
  • Replace hydraulic return filter
  • Perform battery service and terminal inspection
  • Conduct coolant SCA test
  • Take KOWA oil sample for analysis
Every 1,000 h
  • Take hydraulic oil sample
  • Inspect turbocharger
  • Check valve adjustment
  • Perform structural inspection of welds
  • Measure component wear levels
Every 2,000 h
  • Change hydraulic oil
  • Flush and replace engine coolant
  • Perform transmission service and filter replacement
  • Conduct comprehensive component evaluation
  • Check differential and axle oil levels

Servicing the WA320-3H(S/N WA320H20051-WA320H20560) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize the KOWA (Komatsu Oil Wear Analysis) program to monitor engine oil and hydraulic fluids for wear metals like iron or copper. Regularly check coolant pH and SCA concentrations to prevent internal corrosion. Integrating KOMTRAX telematics allows for remote monitoring of fuel consumption, fault codes, and DEF levels, enabling proactive adjustments before component failure occurs.

Corrective & Common Repairs

Monitor hydraulic hoses for cracks or leaks to prevent pressure loss. Inspect articulation and steering pins regularly; if play exceeds factory limits, replace worn bushings. Ensure the fuel/water separator is drained daily to prevent injector damage. When replacing emission-related components, use only genuine Komatsu or approved rebuilt parts to maintain system integrity and compliance.

Overhaul & Rebuild Points

Plan for major hydraulic oil changes and transmission service at 2,000-hour intervals. During long-term rebuilds, evaluate the turbocharger for play and inspect structural welds on the boom and bucket. Check the KDPF (Diesel Particulate Filter) status; Komatsu typically provides exchange units around 4,500 hours to maintain exhaust efficiency and prevent engine backpressure issues.

Seasonal & Environment Servicing

In dusty environments, frequently inspect the air filter outer element and clean radiator/oil cooler fins to prevent overheating. For cold weather operation, ensure all hydraulic circuits are bled of air and check for fluid viscosity changes. During high-use seasons, increase frequency of grease applications to all pivot points, including the Z-bar linkage and bucket pins.

WA320-3H(S/N WA320H20051-WA320H20560) common service parts

Part numberPart
07281-00197Clamp,(With Pre-Fuel Filter)Check fitment →
1267388H1FilterCheck fitment →
1295155H1Filter ElementCheck fitment →
07063-01142Element, Filter - Hydraulic TankCheck fitment →
424-72-H1180ElementCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

WA320-3H(S/N WA320H20051-WA320H20560) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
E10Engine controller power failure or engine management system malfunctionFaulty ECM power connections, blown fuses, or defective ground wiresInspect ECM power connections, fuses, and ground wires
E11Engine protection active; output power reducedHigh coolant temperature, low oil pressure, or clogged air filterCheck coolant temperature, engine oil pressure, and air filter condition
CA115Engine crankshaft speed sensor failureBroken sensor, wiring harness damage, or connector corrosionReplace the speed sensor and verify voltage at the pin connector
CA153 / CA154Intake air temperature sensor error (High/Low voltage)Sensor short circuit or airflow restrictionReplace or test the intake air temperature (IAT) sensor and wiring
CA234Engine overspeedThrottle calibration error, excessive engine load, or operator misuseVerify throttle calibration and check engine load cycle
CA451 / CA452Common rail pressure errorMalfunctioning fuel rail pressure sensor or issues in the pump linesDiagnose the fuel rail pressure sensor and inspect pump lines
E03Parking brake system fault or pressure sensor malfunctionHydraulic pressure sensor damage or loose wiringInspect the hydraulic pressure sensor and associated wiring

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

WA320-3H(S/N WA320H20051-WA320H20560) attachments & work tools

Buckets and Material Handling

Standard configurations include various bucket options such as GP buckets and feed buckets with capacities ranging from 2.3 m³ (3.0 yd³) to 3.2 m³ (4.2 yd³). High lift booms are available to extend reach for diverse projects.

Mounting and Coupler Systems

The machine supports quick coupler options, including JRB hydraulic quick couplers. Some configurations feature a standard loader linkage with a standard lift arm.

Hydraulic and Control Options

Optional third spool hydraulics are available for auxiliary tools. These can utilize an integrated proportional control switch via the multi-function mono-lever, with settings for continual or proportional control via the monitor panel.

Guarding and Protection

Customizable waste guarding packages are offered to improve visibility. Specific protection includes bucket cylinder rod guards to prevent damage from falling debris and a vandalism protection kit featuring padlocks for battery boxes.

Additional Work Tools

The machine can be equipped with pallet forks for material handling. Cutting edge bolt-on types are also available as an option.

All WA320-3H(S/N WA320H20051-WA320H20560) assemblies by section

Every catalogued assembly group for the Komatsu WA320-3H(S/N WA320H20051-WA320H20560). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

01 Engine, Engine Mounting
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 00 Maintenance Kit : Unit_02_of_02
07***75O-Ring,(F2310-52a0 -15 )1
07***23O-Ring,(F4350-68a0 -13 )1
12***H1Filter1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 00 Maintenance Kit : Unit_01_of_02
07***75O-Ring,(F2310-52a0 -15 )2
07***23O-Ring,(F4350-68a0 -13 )1
07***42Element, Filter - Hydraulic Tank2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 01 Engine, Engine Mounting
01***45Bolt, Mounting Bracket To Radiator (Top)4
01***65Bolt, Mount Radiator To Frame (Bottom)4
01***50Bolt,(For Tbg/Abe Spec.)8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 02 Cylinder Block And Attaching Parts
67***60Oil Switch1
67***10Switch, Oil Pressure1
67***90Nozzle, Piston Cooling6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 03 Gasket Kit, Cylinder Block
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 04 Crank Assembly
12***91Connecting Rod Ass'Y6
12***92Piston Ring A.,Piston6
67***10Kit, Main Bearing - Standard1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 05 Cylinder Head And Attaching Parts
12***H1Spring Seat6
67***70Seal, Valve Stem - Intake6
67***40Bolt (M12-1.75x25)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 06 Gasket Kit, Cylinder Head
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 07 Cylinder Head Cover, Attaching Parts
07***80Clip1
07***10Hose1
08***36Tie, Cable1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 08 Timing Gear Case And Flywheel Housing
13***H1Housing,Flywheel1
67***20Seal, Rectangular Ring1
67***30Plate, Cover1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 09 Engine Timing Gear
12***H2Camshaft1
67***20Support, Camshaft Thrust1
67***60Bolt (M8x1.25x22)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 10 Engine Lubrication
01***25Bolt, Mount Engine Oil Drain To Fuel Tank2
07***12Gasket,Oil Pan Drain2
07***18Joint, Oil Pan Drain Tube1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 14 Oil Filter
12***H1Compression Spring1
12***H1O-Ring1
12***H1Filter Element1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 15 Water Pump
67***20Seal, O-Ring1
67***10Screw3
67***16Water Pump1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 17 Fan, Belt Tensioner
01***10Screw4
01***32Washer,(With Auto Emergency Steering)4
67***10Spacer,Fan1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 19 Cooling System
12***H1Filter1
67***30Plug, Pipe (1/8 Nptf)1
67***20Sensor, Temperature Coolant1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 20 Injection System
13***91Overflow Oil Line1
67***90Valve, Check (M8x1.25x17.5)1
67***30Seal, Injector (For 7mm Head)1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 21 Injection Pump
41***01By Pass Valve1
41***02O-Ring1
41***03O-Ring1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 26 Fuel Pump
67***10Pump,Lift1
CU***48Gasket1
CU***61Banjo Bolt1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 27 Injection Pump Drive
42***20O-Ring1
67***80Stud Bolt2
67***70Nut, Hex Flange (M10-1.50 Thd)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 28 Fuel System, Pre Filter
01***55Bolt, Mount Standard Weight3
01***10Screw,(For Lighter)5
01***16Bolt - Starting Motor Ground Cable6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 30 Fuel System, Filter
13***H1Hose1
41***01Seal1
67***90Clamp, Hose2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 47 Intake Manifold, Turbocharger
67***20Gasket, Exhaust Manifold1
67***50Tab Washer12
CU***48Cover1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 48 Turbocharger
CU***87Stud1
CU***62Hose Assembly1
CU***78Turbocharger1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 49 Air Filter System, Standard
01***30Bolt,(For Mechanical Governor)2
01***35Bolt,(For Quick Shift) (Mitsubishi)2
01***08Nut,(For Canvas Canopy?Head Guard)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 56 Ether Starting Kit
01***16Bolt, Mounting Transmission Control Switch2
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)2
01***05Nut,Voice Alarm2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 57 Exhaust System
01***20Bolt,(For Quick Shift) (Mitsubishi)3
01***30Bolt,(For Quick Shift) (Mitsubishi)10
01***35Bolt,(For Quick Shift) (Mitsubishi)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 60 Engine Control : Unit_01_of_02
01***16Bolt, Mount Washer Tank To Bracket, Bolt2
01***25Bolt,(For Canvas Canopy?Head Guard)2
01***70Screw1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 01 Engine, Engine Mounting : 60 Engine Control : Unit_02_of_02
01***25Bolt,(For Canvas Canopy?Head Guard)2
01***30Bolt,See Fig. K4010-17a03
01***16Bolt - Starting Motor Ground Cable3
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02 Cooling System
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 02 Cooling System : 73 Radiator
01***20Bolt,(With Auto Emergency Steering)8
01***60Bolt, Mount Tube To Switch Pump4
01***25Bolt,(Without Rops Guard? Canopy)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 02 Cooling System : 75 Hydraulic Oil Cooling
01***16Bolt - Starting Motor Ground Cable2
01***30Bolt - Lower Oil Cooler Outlet Tubemounting1
01***11Nut,(With Under Mirror)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 02 Cooling System : 77 Cooling Water Pipes
01***16Bolt, Battery To Frame Ground Wire Attaching4
01***16Bolt - Starting Motor Ground Cable2
01***32Washer,(With Auto Emergency Steering)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 02 Cooling System : 79 Transmission Oil Cooling
01***16Bolt - Starting Motor Ground Cable11
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)2
01***30Bolt - Lower Oil Cooler Outlet Tubemounting2
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03 Electric System
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 41 Alternator And Starter Motor
67***30Alternator A. (50a)1
67***30Starting Motor Ass'Y1
67***26Gasket, Starter1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 42 Alternator
13***H1Pulley1
41***02Nut1
41***05Ventilator1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 43 Starter Motor
41***02Bushing1
41***03Disc1
41***04Anchor1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 56 Electric System, Lighting Unit : Unit_01_of_02
01***08Screw, Terminal2
01***12Screw,(For Side Lamp) (Not Shown)4
01***25Screw - Antenna Mounting2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 56 Electric System, Lighting Unit : Unit_02_of_02
01***22Screw4
01***12Screw,(For Side Lamp) (Not Shown)4
01***25Screw - Antenna Mounting2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 61 Electric System
01***10Screw1
01***12Screw10
01***12Screw2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 62 Electric System, Relay
01***12Screw,(For Side Lamp) (Not Shown)2
01***10Bolt - Relay And Flasher Mounting8
01***16Bolt, Mounting Transmission Control Switch4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 64 Instrument Box And Attaching Parts
01***10Washer,(Except Japan)12
01***05Washer,(Except Japan)12
08***03Bulb? 3w,Turn Signal Lamp1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 66 Windshield-Wiper - Washer System : Unit_01_of_02
01***16Screw,(P.O.C. Model) (Except Japan)2
01***16Bolt, Mounting Transmission Control Switch4
01***12Bolt,(With Speedometer)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 66 Windshield-Wiper - Washer System : Unit_02_of_02
01***16Screw,(P.O.C. Model) (Except Japan)2
01***16Bolt, Mounting Transmission Control Switch4
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 68 Radio
42***68Orifice Plate1
42***50Cladding1
42***10Harness1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 70 Turning Light
01***16Screw4
01***20Screw3
01***16Bolt, Mount Solenoid Valve4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 71 Back Up Alarm
01***16Washer,(For 35a Alternator)8
42***20Horn1
42***91Harness, Back-Up Alarm1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 74 Battery
01***65Bolt,(With Canvas Or Rops Canopy)2
01***40Screw4
01***08Screw, Terminal6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 03 Electric System : 75 Battery Main Switch
01***16Bolt, Mount Washer Tank To Bracket, Bolt2
01***16Bolt, Battery To Frame Ground Wire Attaching1
01***05Nut,(For Air Conditioner Less), Nut2
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04 Transmission, Universal Joint
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 75 Universal Joint
01***60Bolt, Hanger Bearing Mounting4
01***15Screw1
01***45Screw20
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 78 Torque Converter
01***25Screw32
01***55Screw8
01***23Washer, Wiring Harness Mounting Bracket32
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 82 Shifting And Converter Pump
01***25Bolt,(For Canvas Canopy?Head Guard)4
01***32Washer, (Without Emergency Steering)8
01***32Washer, (Without Emergency Steering)8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 85 Powershift Transmission
07***23O-Ring,(F4350-68a0 -13 )1
07***09Plug, Oil Drain1
41***00Filter Assembly (See Pg F-058)1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 88 Gears And Shafts
04***20Ring, Retaining1
04***20Ring, Retainer1
04***04Ring, Snap1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 89 Pressure Redulating Valve
01***25Screw4
07***14O-Ring,(F4350-63a1a-2 )1
07***38Ring, Seal - Between Sections3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 92 Powershift Transmission, Control Valv
01***25Bolt,(Without Auto Priming System)16
01***20Bolt,(Large Capacity Type) (Std)1
01***45Bolt,(For Suction? Reversible Fan)1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 04 Transmission, Universal Joint : 94 Transmission Shift
01***08Screw, Mount Damper To Shaft6
01***12Screw2
01***08Screw, Terminal9
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05 Rear Axle
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 05 Rear Axle : 43 Rear Axle
01***60Washer,(Without Rops Guard? Canopy)30
41***70Bolt, Mounting Rear Wheels30
41***01Axle Assembly, Rear1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 05 Rear Axle : 44 Axle Insert
01***40Capscrew - M12 X 1.75 X 40lg56
01***40Capscrew10
01***15Screw1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 05 Rear Axle : 45 Differential
01***40Screw12
01***32Washer,(Not Used With Emergency Str.)12
41***00Differential1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 05 Rear Axle : 47 Planetary Drive, Brake
01***10Screw2
01***60Washer,(Without Rops Guard? Canopy)30
41***60Shaft Seal2
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06 Disc Wheel, Chain
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 06 Disc Wheel, Chain : 77 Disc Wheel
41***04Side Ring1
41***05Circlip1
41***10Rim4
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07 Steering
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 00 Steering, Steering Mounting
01***25Bolt,(For Canvas Canopy?Head Guard)2
01***20Capscrew2
01***50Screw3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 01 Steering Column
01***12Bolt,(See Fig. K0210-16a0)4
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
01***30Bolt, Mounting - Front Hand Rails4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 02 Steering Unit
41***30Cap, End1
41***60Plate, Spacer1
41***70Drive1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 05 Steering, Pipings
01***16Bolt - Starting Motor Ground Cable4
01***11Nut,(With Under Mirror)2
01***32Washer,(With Auto Emergency Steering)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 06 Steering Cylinder And Pipings
01***20Bolt,(Forwarded Individually Parts)2
01***45Bolt, Bracket Mounting7
01***11Nut,(With Under Mirror)16
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 07 Steering Cylinder
07***70O-Ring,(For Intake Air Cover)1
07***65O-Ring,(F5350-62a0 -14 )1
07***08Plug,(For W/O. Corrosion Resistor)1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 08 Emergency Steering Pump And Pipings : Unit_01_of_02
01***16Bolt (With Air Heater & Conditioner)5
01***25Bolt,Without Revolution Sensor2
01***16Bolt, Battery To Frame Ground Wire Attaching3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 08 Emergency Steering Pump And Pipings : Unit_02_of_02
01***20Bolt,(Without Rops Guard? Canopy)4
01***20Screw3
01***70Screw12
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 09 Emergency Steering Pump
04***12Ring,Snap (For Ripper)1
42***00Ball Bearing1
42***10Ring1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 14 Relief Valve Jet
41***10Seal Kit, Cushion Valve1
41***30Poppet2
41***40Compression Spring2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 07 Steering : 16 Priority Valve
01***90Bolt,With Cover4
01***45Bolt, Bracket Mounting3
01***23Washer, Wiring Harness Mounting Bracket6
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08 Front Axle
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 08 Front Axle : 00 Front Axle
01***45Bolt,(For L=529mm Pin)8
01***19Nut8
01***60Washer,(Without Rops Guard? Canopy)46
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 08 Front Axle : 01 Axle Insert
01***40Capscrew - M12 X 1.75 X 40lg56
01***40Capscrew10
01***15Screw1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 08 Front Axle : 02 Differential
01***95Screw12
01***32Washer,(Not Used With Emergency Str.)12
17***80Pin..(Included In Case Ass'Y)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 08 Front Axle : 04 Planetary Drive, Brake
01***10Screw2
01***60Washer,(Without Rops Guard? Canopy)30
41***60Shaft Seal2
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09 Brake System
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 00 Brake System : Unit_02_of_02
01***10Bolt,For Weight Adjusting Bolt4
01***30Screw4
01***30Bolt, Mounting - Front Hand Rails2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 00 Brake System : Unit_01_of_02
01***40Bolt,(With Air Conditioner)4
01***50Screw1
01***16Bolt - Starting Motor Ground Cable3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 01 Brake Piping, Front Axle : Unit_01_of_04
01***40Capscrew - M12 X 1.75 X 40lg1
01***16Bolt - Starting Motor Ground Cable8
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 01 Brake Piping, Front Axle : Unit_03_of_04
01***45Screw6
01***16Bolt - Starting Motor Ground Cable6
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)5
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 01 Brake Piping, Front Axle : Unit_02_of_04
01***45Screw6
01***16Bolt - Starting Motor Ground Cable3
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 01 Brake Piping, Front Axle : Unit_04_of_04
01***45Screw6
01***16Bolt - Starting Motor Ground Cable6
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)5
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 02 Brake Piping, Rear Axle : Unit_02_of_02
01***20Bolt,(Without Rops Guard? Canopy)2
01***16Bolt - Starting Motor Ground Cable2
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 02 Brake Piping, Rear Axle : Unit_01_of_02
01***40Capscrew - M12 X 1.75 X 40lg1
01***16Bolt - Starting Motor Ground Cable5
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 05 Pressure Tank
72***10Pressure Tank1
72***20Packing Kit1
72***30Packing Kit1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 06 Pressure Regulator
07***11O-Ring,(Tm8202-009)1
07***14O-Ring,(Without Maintenance Monitor)1
07***18O-Ring (Kit)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 15 Brake Valve : Unit_02_of_02
01***08Nut,(For Canvas Canopy?Head Guard)1
41***10Safety Catch1
41***50Screw1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 15 Brake Valve : Unit_01_of_02
01***20Screw1
01***25Bolt,See Fig. K4010-65a04
01***06Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-108061
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 09 Brake System : 90 Hand Brake And Operating Assembly
01***25Screw2
01***10Bolt - Relay And Flasher Mounting2
01***16Bolt - Starting Motor Ground Cable5
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10 Frame
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 00 Front Frame
01***20Bolt,(Without Rops Guard? Canopy)4
01***30Bolt,(Not Used With Emergency Str.)10
01***45Bolt, Mounting Bracket To Radiator (Top)6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 01 Rear Frame
01***25Bolt,(Without Rops Guard? Canopy)2
01***50Screw4
01***90Bolt, Adjusting4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 04 Rear Frame, Lubrication Pipe
01***16Bolt - Starting Motor Ground Cable1
04***10Clip - Fuel Sensor Harness1
07***75Fitting,Grease (Without Lub. Piping)3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 06 Fender
01***30Bolt,(Not Used With Emergency Str.)6
01***25Bolt, Mount Engine Oil Drain To Fuel Tank6
01***32Washer,(Not Used With Emergency Str.)6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 08 Bonnet
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
01***25Bolt,L.H. (For Add. Air Compressor)24
01***03Nut; Was 01508-20603, Nut? L.H. Thread,L.H. Thread2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 12 Counterweight
01***75Screw4
01***90Bolt, Adjusting4
01***32Threaded Bush4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 14 Platform
01***35Bolt,(For Quick Shift) (Mitsubishi)1
01***10Screw2
01***12Bolt,(See Fig. K0210-16a0)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 15 Radiator Guard And Bonnet : Unit_02_of_02
01***40Bolt,R.H. Outside And L.H. Inside, Bolt8
01***12Screw,(For Side Lamp) (Not Shown)5
01***55Screw4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 15 Radiator Guard And Bonnet : Unit_01_of_02
01***40Bolt,R.H. Outside And L.H. Inside, Bolt8
01***12Screw,(For Side Lamp) (Not Shown)5
01***55Screw4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 10 Frame : 16 Ladder
01***45Bolt, Mounting Bracket To Radiator (Top)2
01***16Bolt - Starting Motor Ground Cable8
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)8
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11 Drivers Cab
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 00 Safety Cabin : Unit_02_of_02
01***45Bolt, Fuel Tank Mounting - Front Right8
01***40Screw2
01***16Screw2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 00 Safety Cabin : Unit_01_of_02
01***45Bolt, Fuel Tank Mounting - Front Right8
01***40Screw2
01***16Screw3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 01 Safety Cabin, Doors : Unit_02_of_03
01***16Washer,(For 35a Alternator)2
41***40Hinge (Welded)2
42***60Plain Washer2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 01 Safety Cabin, Doors : Unit_01_of_03
01***25Bolt,Without Revolution Sensor4
01***12Screw14
01***16Screw2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 01 Safety Cabin, Doors : Unit_03_of_03
01***16Bolt, Mount Washer Tank To Bracket, Bolt2
01***12Screw,(With Articulate Indicator)8
01***25Bolt - Relay Mounting16
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 04 R.O.P.S Canopy
01***75Screw8
01***35Bolt, Hydraulic Tank Mounting1
01***00Screw8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 11 Soundproofing Of Cabin
01***12Bolt, Bolt,(No Need To Quick Shift)2
01***25Bolt,(For Automatic)4
01***10Bolt - Relay And Flasher Mounting3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 12 Soundproof
01***20Bolt - Mount Risers To Cab Floor8
01***25Bolt,L.H. (For Add. Air Compressor)8
01***35Bolt,R.H. (For Add. Air Compressor)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 17 Ventilation
01***12Screw,(Not Shown) (For Std Cab)4
01***12Bolt,(See Fig. K0210-16a0)4
01***16Bolt, Mounting Transmission Control Switch8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 18 Heater : Unit_01_of_02
01***16Bolt, Mounting Transmission Control Switch2
01***16Bolt - Starting Motor Ground Cable7
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 18 Heater : Unit_02_of_02
01***16Bolt, Battery To Frame Ground Wire Attaching1
01***16Bolt, Mounting Transmission Control Switch2
01***16Bolt - Starting Motor Ground Cable7
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 19 Air Conditioner
01***16Bolt, Mounting Transmission Control Switch4
07***89Clamp,(D31s)2
42***30Finisher1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 11 Drivers Cab : 27 Drivers Seat, Attaching Parts
01***40Bolt,(For Position Fixing)2
01***25Bolt,Without Revolution Sensor4
01***25Bolt,L.H. (For Add. Air Compressor)4
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12 Tools, Accessory, Lettering
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 00 Wedge And Attachement
04***10Pin,Cotter? (For Ripper)2
41***20Underl Wedge2
41***40Bonnet Fastener2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 01 Tools And Accessory
01***90Screw1
01***16Bolt, Mounting Transmission Control Switch2
01***06Nut,L.H. Thread (For Russian)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 02 Tools
07***03Cartridge - Grease1
09***06Wrench Set,8x10? 12x14? 13x17?1
09***00Wrench - Adjustable1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 03 Lettering
09***80Plate? Mark,Komatsu? Front2
09***60Decal, Komatsu (Black Lettering) (Behind Driver'S Door)2
41***40Plate? Mark,Komatsu1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 04 Decals, German
09***00Plate? Safety,Accumulator Warning6
09***00Tag,Do Not Operate (German)1
41***20Note Plate1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 05 Decals, English
09***00Plate? Safety,(English) (Lettering Type)6
09***00Tag,(For South And North America)1
41***30Note Plate1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 06 Decals, French
09***00Decal, Safety, Explosion Hazard6
09***00Tag,(For South And North America)1
41***30Note Plate1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 08 Decals, Italian
09***00Plate? Safety,Accumulator6
41***30Note Plate1
42***50Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 09 Decals, Spanish
09***00Plate? Safety,Acc.(Spanish)(Cen.Sou.America)6
41***30Note Plate1
42***50Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 10 Decals, Swedish
41***30Note Plate1
42***50Decal2
42***60Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 11 Decals, Danish
41***30Note Plate1
42***50Decal2
42***80Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 12 Decals, Finnish
41***30Note Plate1
42***50Decal2
42***20Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 13 Decals, Norwegian
41***30Note Plate1
42***50Decal2
42***00Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 14 Decals, Dutch
41***30Note Plate1
42***50Decal2
42***60Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 15 Decals, Portuguese
41***30Note Plate1
42***50Decal2
42***40Decal1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 12 Tools, Accessory, Lettering : 16 Decals, Greek
13 Hydraulic System
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 00 Pumps For Hydraulic System : Unit_01_of_02
01***30Bolt,(Not Used With Emergency Str.)4
01***32Washer, (Without Emergency Steering)4
01***45Washer, Spring8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 00 Pumps For Hydraulic System : Unit_02_of_02
42***08Packing Kit1
42***09Coupling/Clutch2
42***51Repair Kit1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 06 Oil Tank
01***30Bolt,(For Rubber Shoe)1
01***35Bolt, Hydraulic Tank Mounting2
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)6
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 08 Pipings For Remote Control Valve : Unit_02_of_02
01***16Bolt - Starting Motor Ground Cable1
01***55Bolt, Mount Dryer To Bracket And Frame4
04***10Clip2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 08 Pipings For Remote Control Valve : Unit_01_of_02
01***16Bolt - Starting Motor Ground Cable4
01***11Nut,(With Under Mirror)2
01***32Washer,(With Auto Emergency Steering)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 09 Remote Control Valve
07***20O-Ring,Relief Valve4
07***12Plug,Taper2
70***05Valve Assembly, P.P.C. - Two-Spool1
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 10 Pressure Pipings To Control Valve
01***35Screw4
01***35Screw12
01***40Screw8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 11 Control Valve,Return Pipings
01***35Screw12
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)2
01***11Nut,(With Under Mirror)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 12 Control Valve
01***85Bolt, Control Valve Mounting2
01***90Bolt,For Reversible Fan1
01***55Bolt, Mount Lh Bracket4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 25 Lift Cylinder And Pipings
01***65Screw16
01***35Screw8
01***45Bolt, Bracket Mounting8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 26 Lift Cylinder
01***55Bolt,(For Shipping)12
01***40Screw6
01***45Washer,(For Quick Shift) (Mitsubishi)12
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 27 Bucket Cylinder And Pipings
01***05Bolt, Mount Tube2
01***65Screw4
01***35Screw16
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 28 Bucket Cylinder
01***60Capscrew12
01***40Screw6
01***45Washer, Spring12
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 40 Pipings For Accessory Equipment : Unit_02_of_02
01***35Screw32
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
01***45Bolt, Bracket Mounting4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 13 Hydraulic System : 40 Pipings For Accessory Equipment : Unit_01_of_02
01***35Bolt,(For Position Fixing)16
01***35Screw8
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
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14 Boom, Thrust Frame - Arm
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 14 Boom, Thrust Frame - Arm : 00 Boom
01***25Bolt,(For High High Lift)11
01***30Bolt,(For Rubber Shoe)2
01***08Washer,(For 1 Attachment And Pat)8
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15 Equipment
Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 00 Bucket
41***50Holder,Tooth (Welded)8
41***60Tooth8
41***70Safety Catch8
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 10 Ripper Tooth Wear Plate And Marker Li
01***70Bolt, Mount Bracket And Oil Inlet Tube, Bolt2
01***16Screw,(P.O.C. Model) (Except Japan)4
01***50Wing Nut2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 12 Bucket Position Indicator : Unit_01_of_02
01***35Screw2
01***16Bolt - Starting Motor Ground Cable2
01***20Bolt - Mount Risers To Cab Floor4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 12 Bucket Position Indicator : Unit_02_of_02
01***20Bolt - Mount Risers To Cab Floor4
01***25Bolt,L.H. (For Add. Air Compressor)2
01***35Bolt,R.H. (For Add. Air Compressor)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 62 A.L.S. Equipment
01***35Screw12
01***20Bolt - Mount Risers To Cab Floor4
01***25Bolt,L.H. (For Add. Air Compressor)4
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 70 Central Lubrication
42***10Screw7
42***60Plain Washer3
42***70Nut10
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 82 E.C.S.S. Electrical Equipment
01***16Bolt, Mount Solenoid Valve8
01***16Bolt - Starting Motor Ground Cable11
04***10Clip,(With Accumulator)3
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 82 E.C.S.S. Pressure Tank,Solenoid Valve And Pipes : Unit_02_of_04
01***15Screw2
01***25Bolt,L.H. (For Add. Air Compressor)8
01***32Washer,(Not Used With Emergency Str.)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 82 E.C.S.S. Pressure Tank,Solenoid Valve And Pipes : Unit_04_of_04
01***15Screw2
01***25Bolt,L.H. (For Add. Air Compressor)8
01***19Washer,Spring (With Extinguisher) (D31p)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 82 E.C.S.S. Pressure Tank,Solenoid Valve And Pipes : Unit_01_of_04
01***15Screw2
01***25Bolt,L.H. (For Add. Air Compressor)8
01***32Washer,(Not Used With Emergency Str.)2
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Komatsu : Wa320-3h(S/N Wa320h20051-Wa320h20560) : 15 Equipment : 82 E.C.S.S. Pressure Tank,Solenoid Valve And Pipes : Unit_03_of_04
01***15Screw2
01***25Bolt,L.H. (For Add. Air Compressor)8
01***19Washer,Spring (With Extinguisher) (D31p)2
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WA320-3H(S/N WA320H20051-WA320H20560) serial number reference

The PIN plate is located on the front frame of the wheel loader, typically on the right-hand side of the articulation joint. To read the prefix, identify the first three characters of the serial number sequence following the model designation.

PrefixIdentifies
WA320HWA320-3H

Frequently asked questions

What engine is used in this model?

The WA320-3 series utilizes a turbocharged diesel engine; specific designations vary by regional emissions package (e.g., S6D114E-1).

What is the operating weight of the machine?

Operating weight varies by configuration, but for the WA320-3 Active+ variant, it is approximately 30,754.5 lb (13,950 kg).

What model replaced the WA320-3?

The series progressed through subsequent generations including the WA320-5 and the Tier 4 compliant WA320-8.

What WA320-3H(S/N WA320H20051-WA320H20560) owners discuss

What are common transmission behaviors and issues observed during gear changes on the WA320-3 series?
Operators have reported significant deceleration or a complete stop when attempting to downshift from 3rd to 2nd gear, sometimes accompanied by hard bouncing. Additionally, some units experience overheating or intermittent loss of movement in both forward and reverse gears.
What should be inspected if the transmission is overheating or failing to move the loader?
Check the suction piping for loose clamps or leaks, as these machines are known to suck air into the pumps. For engagement issues, examine the linkage and shift mechanisms for wear or misalignment, and monitor pressure readings and transmission filters to detect internal leaks or worn clutches.
What is a known cause for sudden stops or brake lockup in this machine type?
Sudden stops or locked brakes often stem from a faulty hydraulic accumulator or related wiring issues. The accumulator must maintain sufficient pressure to release the brakes; inspect it for leaks or pressure loss.
What are common electrical or sensor-related symptoms on the WA320-3 dashboard?
Common issues include the 'engine secondary switch in operation' warning remaining displayed even after the switch is turned off. For more complex errors, such as an E03 code (which may indicate a pressure sensor malfunction), use Komatsu diagnostic software to retrieve the full fault code history for investigation.
What engine and fluid specifications apply to the WA320-3 (S/N 20051-20560)?
This machine utilizes a Komatsu SA6D102E engine. For maintenance, use Komatsu genuine oils specifically formulated for hydraulic and engine applications. When using single-grade engine oil, it is acceptable to mix with multigrade (SAE 10W-30, 15W-40) as long as the grade matches the required operating temperature.
What should be checked when buying a used WA320-3H (S/N 20051-20560)?
Verify the integrity of the hydraulic suction piping to ensure no air is being drawn into the pumps. Inspect the brake accumulator for pressure loss and check the shifter linkage for excessive play or 'floppy' movement, which can indicate worn shift forks or disconnected components. Have your dealer verify all hydraulic pressure readings and solenoid resistance.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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