Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA90-3 is a compact wheel loader manufactured from 1998 to 2005. It features a 4-cylinder Komatsu emissionized engine, specifically the turbocharged S6D105 model delivering 157 hp gross power. The machine has an operating weight of 5,610 kg (12,368 lb) and a heaped bucket capacity of 0.9 m³ (3.1 cu yd). It is equipped with a TORQFLOW full power shift countershaft transmission. Configurations include a basic model with ROPS cabin, standard shovel, and optional quick hitch (hydraulic or mechanical). The WA95-3 is the variant associated with serial numbers HA980051-HA980668 and H20651-H20671. The WA90-3 succeeded the WA90-2 series and was followed by the WA90-4 series.
Across the WA90-3 generation, Komatsu introduced a completely sealed engine cover for optimum accessibility from three sides and a quiet operation design that earned an Angel Award. The machine matters in the used and parts market today because it is a compact, versatile loader for confined spaces, construction sites, and road work. Its simple mechanical design and widespread use in municipal and utility applications ensure a steady demand for replacement parts. The serial break at HA970239/H20316 and HA980376/H20669 indicates configuration changes, likely related to the 30 km/h option, which affects transmission and final drive specifications.
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 WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) specifications
Engine
| Model | S6D105 (turbocharged) |
| Gross Power | 157 hp (117 kW) |
| Displacement | 396 cu in (6.49 L) |
| Cylinders | 6 |
| Emissions Tier | Tier 2 / Stage II |
Weights
| Operating Weight | 27,117 lb (12,300 kg) |
| Static Tipping Weight | 21,385 lb (9,700 kg) |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | 22.54 ft (6.87 m) |
| Transport Width | 8.26 ft (2.52 m) |
| Transport Height | 10.63 ft (3.24 m) |
| Wheelbase | 9.42 ft (2.87 m) |
| Ground Clearance | 1.43 ft (0.44 m) |
| Turning Radius | 20.8 ft (6.34 m) |
Performance
| Max Speed Forward | 18.9 mph (30 km/h) |
| Max Speed Reverse | 20.1 mph (32 km/h) |
| Breakout Force | 26,230 lbf (116.7 kN) |
| Lift Time | 5.3 sec |
| Dump Time | 2.5 sec |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Tank | 59.8 gal (226 L) |
| Hydraulic System | 94.0 L |
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | 10.1 gal (38.2 L) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 12.5 L (3.3 US gal) | Komatsu Diesel Engine Oil (SAE 10W or 30W, API CD); varies by climate |
| Cooling system | 18.5 L (4.9 US gal) | Komatsu Super Coolant AF-NAC (50/50 pre-mix) |
| Fuel tank | 160 L (42.3 US gal) | Diesel fuel (ASTM D975 No. 2-D or ISO 8217 DF-1/DF-2) |
| Transmission (Rear axle with transmission gears) | 11.0 L (2.9 US gal) | Komatsu Powertrain Oil TO30 (SAE 30W, API CD) |
| Front axle | 6.5 L (1.7 US gal) | Komatsu Axle Oil AXO80 (SAE 80W, API GL-4) |
| Hydraulic system and tank | 94.0 L (24.8 US gal) | Komatsu Hydraulic Oil HO (ISO VG 46, DIN 51524 Part 2, class HLP) |
| Final drives (each) | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Grease | N/A | Komatsu Grease (Lithium complex base, NLGI No. 2) |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every major service interval to monitor engine wear metals, hydraulic particle counts, and coolant pH levels. Check the air filter restriction indicator daily; replace the outer element at 1,000 hours or when indicated. Monitor transmission and axle oil levels at 500-hour intervals. Use Komatsu Genuine Lubricants, including TO powertrain oil and AXO axle oil, to maintain hydraulic system cleanliness and prevent pump wear. Track KOMTRAX telematics data for load frequency and fault codes to anticipate component failures before they occur.
Corrective & Common Repairs
Address frequent issues by inspecting hydraulic hoses for cracks and leaks during daily checks. Replace the fuel filter and hydraulic return filter at 500 hours to prevent injector and valve damage. Check articulation and steering pin play at 1,000 hours; replace worn pins to prevent chassis misalignment. Inspect the TORQFLOW transmission oil filter and change the oil at 1,000 hours to ensure smooth shifts. Verify brake pad thickness at 1,000 hours and replace if worn. Ensure the battery terminals are clean and the battery is load-tested at 500 hours to prevent electrical failures.
Overhaul & Rebuild Points
Plan major overhauls based on hour meter readings and fluid analysis results. Change final drive oil at 1,000 hours and inspect for metal contamination. Flush and replace coolant at 2,000 hours to prevent corrosion and overheating. Inspect the turbocharger at 1,000 hours for shaft play and oil leaks. Evaluate the swing machinery oil at 2,000 hours for viscosity changes. Check structural welds on the boom and linkage during the 2,000-hour comprehensive inspection. Replace all worn belts and clamps at 2,000 hours to prevent sudden failure.
Seasonal & Environment Servicing
In cold weather, check coolant concentration and SCA levels to prevent freezing. Drain water from the fuel separator daily to prevent fuel line icing. In dusty environments, clean the radiator and oil cooler fins daily to prevent overheating. Check tire condition and inflation frequently on abrasive surfaces. Grease all pivot points, including the bucket, Z-bar, steering, and axle, at every 10-hour interval to prevent corrosion and wear. Inspect the air filter outer element more frequently in high-dust conditions and replace as needed.
WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129470-55610 | Body, Fuel Filter | Fuel system service | Check fitment → |
| YM120324-55760 | Element, Fuel Oil | Fuel system service | Check fitment → |
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 42U-01-13110 | Air Filter | Air intake service | Check fitment → |
| YM119005-35100 | Oil Filter Ass'Y | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| AA10NX | Air cleaner clogging | Clogged air filter element | Replace the air filter |
| CA441 | Battery voltage too low | Weak battery, faulty alternator, or loose connections | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator overcharging | Replace the alternator or battery; check the voltage regulator |
| CA122 | Intake air pressure high voltage | Malfunction in the intake pressure sensor or actual overpressure condition | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA144 | Coolant temperature sensor high error | Coolant overheating or sensor fault | Check radiator fins, fan belt, and coolant level |
| CA145 | Coolant temperature sensor low error | Low coolant level or sensor short circuit | Fill coolant and inspect for leaks |
| CA153 | Intake air temperature sensor high error | Faulty intake air temperature (IAT) sensor | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor low error | Faulty intake air temperature (IAT) sensor | Replace or test the IAT sensor |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) attachments & work tools
Standard Buckets
Factory specifications list a heaped capacity range of 0.9 to 1.6 m³ (0.9 to 2.1 yd³), with specific published references data citing a 3.01 yd³ heaped volume for the W90-3 variant. Bucket widths are documented at 2.1 m (6.89 ft). Breakout force is rated at 26,230 lb (116.6 kN).
Coupling Systems
The WA90-3 is equipped with a hydraulic quick coupler option to facilitate attachment changes. Mechanical quick hitch configurations are also available as a factory option. These systems allow for the rapid interchange of the standard bucket and other compatible tools.
Hydraulic Attachments
The machine supports a comprehensive range of Komatsu hydraulic attachments, including grapples, brooms, and specialized buckets. These tools require the machine's hydraulic system, which has a service refill capacity of 94.0 l (24.8 gal) for attachment, steering, and motive power hydraulics.
Engine & Powertrain
The WA90-3 utilizes a turbocharged S6D105 engine delivering 157 hp (117 kW) gross power. The transmission is a TORQFLOW full power shift countershaft type with 3 forward and 3 reverse gears. Max forward speed is 18.9 mph (30.4 km/h).
Guarding & Cab Options
The standard configuration includes a ROPS (Roll-Over Protective Structure) cabin. The engine cover features a wide opening for optimum accessibility from three sides. The machine is noted for quiet operation, contributing to an 'Angel Award' for low noise levels.
All WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) assemblies by section
Every catalogued assembly group for the Komatsu WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
01 Engine, Engine Mounting
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 00 Maintenance Kit
| 42***01 | Filter Element | 1 |
| 42***02 | Filter Element | 1 |
| 42***50 | Filter Element | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 01 Engine, Engine Mounting
| 01***00 | Capscrew | 4 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 16 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 02 Cylinder Block And Attaching Parts
| YM***00 | Screw | 18 |
| YM***20 | Screw | 10 |
| YM***40 | Bearing, Thrust (+0.25 mm) | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 04 Crank Assembly
| YM***00 | Connecting Rod, Assembly | 4 |
| YM***80 | Gear, Ring | 1 |
| YM***10 | Bush,Idle Gear (Repair Part) | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 05 Cylinder Head And Attaching Parts
| YM***70 | Cap Valve | 8 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***00 | Rocker Shaft, Assembly | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 06 Gasket Kit, Cylinder Head
| YM***40 | O-Ring,Drain Plug | 1 |
| YM***01 | Gasket (Kit) | 2 |
| YM***90 | Gasket | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 08 Timing Gear Case And Flywheel Housing
| YM***02 | Bolt Plated | 11 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***02 | Screw | 6 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 09 Engine Timing Gear
| YM***50 | Bearing, Thrust | 1 |
| YM***00 | Gear,Injection Pump Drive | 1 |
| YM***00 | Gear | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 10 Engine Lubrication
| 07***10 | Hose | 1 |
| 42***70 | Hose Assembly | 1 |
| 42***10 | Drain Valve | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 15 Water Pump
| 42***00 | Fan | 1 |
| 42***30 | Adaptor | 1 |
| 78***20 | Sensor, Trans. Control Valve Oil Temperature | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 20 Injection System
| YM***10 | Injection Pump | 1 |
| YM***00 | Nozzle | 4 |
| YM***02 | Bolt Plated | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 24 Injection Pump, Body Pump
| YM***10 | Injection Pump | 1 |
| YM***00 | Segment | 4 |
| YM***00 | Gasket Disc | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 25 Injection Pump
| YM***40 | Screw | 2 |
| YM***00 | Nut | 1 |
| YM***00 | Screw | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 26 Fuel Pump
| YM***40 | Gasket | 4 |
| YM***60 | O-Ring | 2 |
| YM***10 | Feed Pump Ass'Y | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 28 Fuel System, Pre Filter
| 01***16 | Screw | 6 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 29 Fuel System, Fine Filter
| YM***02 | Screw | 1 |
| YM***10 | Banjo Fitting | 1 |
| YM***80 | Screw | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 46 Air Intake System, Standard
| YM***00 | Heather Air | 1 |
| YM***02 | Screw | 9 |
| YM***80 | Intake Stack | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 49 Air Filter System, Standard
| 01***35 | Bolt,(For Fix Position) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 07***09 | Clamp,(With Cylinder Cover) | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 54 Air Cleaner
| 42***10 | Air Filter | 2 |
| 42***01 | Filter Element | 1 |
| 42***02 | Filter Element | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 57 Exhaust System
| YM***02 | Screw | 2 |
| YM***02 | Nut | 6 |
| YM***01 | Gasket (Kit) | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 01 Engine, Engine Mounting : 60 Engine Control
| 01***16 | Bolt - Box Mounting | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
02 Cooling System
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 02 Cooling System : 73 Radiator
| 01***25 | Washer,Spring?For Additional Rear Lam | 6 |
| 01***12 | Washer,(With Body Positioner) | 12 |
| 41***60 | Nut | 6 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 02 Cooling System : 74 Radiator Attaching Parts
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 3 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
03 Electric System
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 42 Alternator
| YM***20 | Timer,Solenoid | 1 |
| YM***40 | Distance Piece | 1 |
| YM***40 | Distance Piece | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 43 Starter Motor
| YM***20 | Shift Lever Ass'Y | 1 |
| YM***10 | Housing | 1 |
| YM***60 | Cover, Rear | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 56 Electric System, Lighting Unit
| 01***16 | Screw, Mount Parking Lights | 4 |
| 42***60 | Plain Washer | 4 |
| 42***70 | Nut | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 61 Electric System, Harness
| 01***16 | Screw | 2 |
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 62 Electric System, Harness
| 01***10 | Screw,(For Lighter) | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 2 |
| 01***12 | Screw,(With Articulate Indicator) | 3 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 63 Instrument Box And Attaching Parts
| 41***60 | Orifice Plate | 1 |
| 42***01 | Key Kit | 1 |
| 42***10 | Starter Switch | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 64 Instrument Box And Attaching Parts
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 42***90 | Protective Strip | 3 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 65 Windshield-Wiper - Washer System
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 41***60 | Nut | 3 |
| 42***60 | Connection | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 68 Radio
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 70 Turning Light
| 01***25 | Bolt, Pinlock | 1 |
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***26 | Washer,Spring | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 71 Back Up Alarm
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 74 Battery
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***12 | Washer,(With Body Positioner) | 2 |
| 42***00 | Battery | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 03 Electric System : 75 Battery Main Switch
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
04 Transmission, Universal Joint
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 04 Transmission, Universal Joint : 61 Axial Piston Pump
| 42***45 | Guide Sleeve | 2 |
| 42***61 | Gasket | 1 |
| 42***74 | Pump | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 04 Transmission, Universal Joint : 75 Universal Joint
| 42***20 | Screw | 16 |
| 42***30 | Nut | 16 |
| 42***00 | Universal Joint | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 04 Transmission, Universal Joint : 83 Clutch
| 01***35 | Screw | 8 |
| 01***25 | Bolt,Sight | 12 |
| 42***40 | Disc | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 04 Transmission, Universal Joint : 97 Hydraulic Pump Drive
| 01***50 | Screw | 2 |
| 01***25 | Bolt,Sight | 4 |
| 01***35 | Screw | 8 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 04 Transmission, Universal Joint : 98 Axial Piston Engine
| 42***62 | Grub Screw | 2 |
| 42***31 | Plate | 1 |
| 42***58 | Plug | 2 |
05 Rear Axle
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 05 Rear Axle : 43 Rear Axle
| 42***20 | U Bolt | 4 |
| 42***60 | Nut | 16 |
| 42***00 | Rear Axle | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 05 Rear Axle : 44 Axle Insert
| 42***14 | Differential Ass'Y | 1 |
| 42***15 | Differential Ass'Y | 1 |
| 42***17 | Magnetic Plug | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 05 Rear Axle : 46 Brake
| 42***72 | O-Ring | 4 |
| 42***73 | Lever | 2 |
| 42***74 | Disc | 2 |
06 Disc Wheel, Chain
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 06 Disc Wheel, Chain : 77 Disc Wheel
| 42***10 | Valve | 4 |
| 42***30 | Rim | 4 |
| 42***20 | Rim | 4 |
07 Steering
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 07 Steering : 00 Steering, Steering Mounting
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 07 Steering : 01 Steering Column
| 42***80 | Steering Column | 1 |
| 42***01 | Nut | 1 |
| 42***02 | Rubber Washer | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 07 Steering : 07 Steering Cylinder
| 42***01 | Steering Cylinder | 1 |
| 42***00 | Cylinder | 1 |
| 42***01 | Ball And Socket Join | 2 |
08 Front Axle
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 08 Front Axle : 00 Front Axle
| 01***95 | Screw | 8 |
| 01***13 | Nut,(For Adjustable Rod) | 8 |
| 01***26 | Washer,Spring | 8 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 08 Front Axle : 01 Axle Insert
| 42***03 | Cover | 1 |
| 42***14 | Differential Ass'Y | 1 |
| 42***15 | Differential Ass'Y | 1 |
09 Brake System
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 09 Brake System : 00 Brake System
| 01***60 | Bolt,(With Body Positioner) | 2 |
| 01***30 | Bolt,Stopper | 1 |
| 01***40 | Screw | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 09 Brake System : 90 Hand Brake And Operating Assembly
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***12 | Washer,(With Body Positioner) | 1 |
| 04***15 | Pin,Cotter (Itl) | 1 |
10 Frame
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 02 Frame
| 01***12 | Bolt,(With Speedometer) | 8 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 03 Hinge
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Screw | 8 |
| 01***40 | Screw | 12 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 06 Fender
| 42***90 | Nut | 8 |
| 42***00 | Nut | 6 |
| 42***60 | Plain Washer | 8 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 09 Radiator Guard And Bonnet
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 12 Counterweight
| 01***35 | Bolt,(With Rops) | 2 |
| 01***00 | Screw | 2 |
| 01***40 | Bolt,(For Operator'S Cab) | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 10 Frame : 14 Platform
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 01***12 | Washer,(With Body Positioner) | 6 |
| 42***90 | Gasket | 1 |
11 Drivers Cab
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 00 Safety Cabin
| 01***20 | Bolt,(Without Air Con. Or Heater) | 3 |
| 01***25 | Capscrew | 6 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 01 Safety Cabin, Doors
| 01***20 | Screw | 6 |
| 42***60 | Screw | 4 |
| 42***40 | Nut | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 04 R.O.P.S. Canopy
| 01***20 | Bolt,(Without Air Con. Or Heater) | 3 |
| 01***08 | Washer,(For Mounting First Aid Kit) | 3 |
| 42***90 | Nut | 8 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 11 Soundproofing Of Cabin
| 42***80 | Screw | 14 |
| 42***30 | Air Nozzle | 2 |
| 42***00 | Cladding | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 12 Soundproof, Platform
| 42***50 | Insulating Mat | 1 |
| 42***70 | Insulating Mat | 1 |
| 42***80 | Insulating Mat | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 13 Soundproof, Motor-Verkleidung
| 42***40 | Bracket | 16 |
| 42***50 | Screw | 16 |
| 42***80 | Insulating Mat | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 18 Heater
| 01***16 | Bolt, Mounting Transmission Control Switch | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 19 Air Conditioner
| 01***16 | Bolt, Mounting Transmission Control Switch | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 11 Drivers Cab : 27 Drivers Seat, Attaching Parts
| 01***25 | Screw | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
| 01***12 | Washer,(With Body Positioner) | 4 |
12 Tools, Accessory, Lettering
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 00 Wedge And Attachement
| 01***20 | Bolt,See Fig. K4010-65a0 | 8 |
| 42***30 | Underl Wedge | 2 |
| 42***40 | Bracket | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 01 Tools And Accessory
| 01***40 | Screw | 4 |
| 01***40 | Nut,(Noise Suppression Spec.) | 1 |
| 04***55 | Pin, Cotter | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 02 Tools
| 42***30 | Tool Bag | 1 |
| 42***10 | Tool Set | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 03 Lettering
| 09***81 | Plate? Caution,Don'T Jump Start | 1 |
| 41***40 | Note Plate | 3 |
| 42***80 | Note Plate | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 04 Decals, German
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 05 Decals, English
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 06 Decals, French
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 08 Decals, Italian
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 09 Decals, Spanish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 10 Decals, Swedish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 11 Decals, Danish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 12 Decals, Finnish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 13 Decals, Norwegian
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 14 Decals, Dutch
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 15 Decals, Portuguese
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 12 Tools, Accessory, Lettering : 16 Decals, Greek
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
13 Hydraulic System
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 01 Hydraulic System
| 01***65 | Capscrew | 4 |
| 01***10 | Screw | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 07 Check Port
| 42***50 | Stud | 1 |
| 42***60 | Brace | 4 |
| 42***80 | Union | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 08 Pipings For Remote Control Valve
| 01***65 | Screw | 2 |
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 41***80 | Lock Washer | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 12 Control Valve
| 42***00 | Inlet Ass'Y | 1 |
| 42***01 | Timing Gear Case | 1 |
| 42***04 | Cover | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 25 Lift Cylinder And Pipings
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***65 | Capscrew | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 26 Lift Cylinder
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 2 |
| 42***80 | Boxnut | 1 |
| 42***90 | Stud | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 27 Bucket Cylinder And Pipings
| 42***40 | Elbow Nipple | 2 |
| 42***50 | Nut | 2 |
| 42***70 | Hose Assembly | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 28 Bucket Cylinder
| 42***21 | Plug | 1 |
| 42***60 | Bushing | 2 |
| 42***40 | Bucket Cylinder | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 13 Hydraulic System : 31 Hose Rupture Safety Device
| 01***45 | Bolt,(With Water Separator Type) | 2 |
| 01***55 | Bolt,(See Service News) | 2 |
| 41***80 | Lock Washer | 2 |
14 Boom, Thrust Frame - Arm
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 14 Boom, Thrust Frame - Arm : 00 Boom
| 01***16 | Bolt - Starting Motor Ground Cable | 9 |
| 42***10 | Nut | 2 |
| 42***60 | Plain Washer | 9 |
15 Equipment
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 00 Bucket
| 42***01 | Bucket | 1 |
| 42***21 | Bucket | 1 |
| 42***20 | Reinforcement | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 02 Quick Change
| 01***85 | Bolt,(For Perforated Mask) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 03 Quick Change, Pipings
| 01***40 | Bolt - M6 X 40lg | 2 |
| 01***70 | Screw | 6 |
| 01***25 | Bolt - Relay Mounting | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 04 Fork Lift
| 42***00 | Locator | 2 |
| 42***80 | Carrier | 1 |
| 42***00 | Prongs | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 05 Grab Bucket
| 01***13 | Nut,(For Adjustable Rod) | 9 |
| 42***03 | Screw | 9 |
| 42***04 | Spring Washer | 9 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 06 Grab Bucket, Pipings
| 42***19 | Union | 2 |
| 42***20 | Union | 4 |
| 42***21 | Tube | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 07 Side Tip Bucket
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(For Rubber Shoe) | 1 |
| 01***26 | Washer,Spring | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 10 Ripper Tooth Wear Plate And Marker Light
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***35 | Screw | 2 |
| 01***50 | Wing Nut | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 11 Return To Dig
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 13 Compost Buckt
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***25 | Bolt, Pinlock | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 10 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 20 High Tip Bucket
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 48 Sweeper
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***03 | Nut,(With Joy Stick Steering) | 2 |
| 08***34 | Tie, Cable | 15 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 49 Crane Boom
| 42***00 | Screw | 2 |
| 42***12 | Boom | 1 |
| 42***13 | Suspension Unit | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 62 A.L.S. Equipment
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***50 | Screw | 2 |
| 01***40 | Screw | 4 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 65 A.L.S. Solenoid Valve
| 42***60 | O-Ring | 1 |
| 42***89 | Electrical Plug | 1 |
| 42***60 | Valve | 1 |
Komatsu : Wa90-3(S/N Ha970051-Ha970315 & H20316-H20318; Wa95-3 S/N Ha980051-Ha980668 & H20651-H20671) : 15 Equipment : 89 Special Equipment Italy
| 01***40 | Bolt (Op) | 2 |
| 01***40 | Nut,(Noise Suppression Spec.) | 2 |
| 01***16 | Plain Washer | 3 |
WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) serial number reference
The PIN plate is riveted to the front frame on the right-hand side of the articulation joint. The prefix is the first four characters of the 17-character ISO PIN stamped on the plate, immediately following the 'KMT' manufacturer identifier.
| Prefix | Identifies | Notes |
|---|---|---|
| HA97 | WA90-3 | Serial range HA970051-HA970315. Factory spec sheet identifies this as a 30km/h options variant. Production years approximately 1998–2001 based on manual issuance dates. |
| H203 | WA90-3 | Serial range H20316-H20318. Factory spec sheet identifies this as a 30km/h options variant. Production years approximately 1998–2001 based on manual issuance dates. |
| HA98 | WA95-3 | Serial range HA980051-HA980668. Factory spec sheet identifies this as a 30km/h options variant. Production years approximately 1998–2001 based on manual issuance dates. |
| H206 | WA95-3 | Serial range H20651-H20671. Factory spec sheet identifies this as a 30km/h options variant. Production years approximately 1998–2001 based on manual issuance dates. |
Frequently asked questions
What engine does the WA90-3 use?
The WA90-3 uses a turbocharged 4-cylinder Komatsu S6D105 engine delivering 157 hp gross power.
What is the operating weight of the WA90-3?
The operating weight is 5,610 kg (12,368 lb).
What model replaced the WA90-3?
The WA90-4 series replaced the WA90-3.
What WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671) owners discuss
What engine powers the WA90-3 (S/N HA970051-HA970315 & H20316-H20318) and WA95-3 (S/N HA980051-HA980668 & H20651-H20671)?
The WA90-3 and WA95-3 wheel loaders in the specified serial ranges are powered by the Komatsu S6D105 turbocharged diesel engine. This engine delivers a gross power output of 157 hp (117 kW). The WA90-3 is also listed with a net horsepower rating of 51.5 kW (70 PS) in some European specifications, while the WA95-3 shares the same S6D105 engine platform. Note that WA90-3 units with serial numbers H20319 and up may utilize different engine configurations or updates compared to the HA prefix range; verify the specific engine plate for the exact unit. The engine is a 4-cylinder, emissionized diesel unit designed for accessibility from three sides via a wide-opening engine cover.
What are the known powertrain and hydraulic behaviors for this machine?
The WA90-3 utilizes a TORQFLOW full-power shift countershaft transmission with full soft shift capabilities. Owners and operators note that hydraulic response times are generally quick, but system performance can degrade when hot due to internal leakage in the pump or main control valve if oil viscosity drops too low. Common powertrain issues include transmission shift delays if the hydraulic fluid is degraded or if the engine speed drops under load. The machine is designed for smooth shifts, but harsh shifting can indicate worn transmission clutches or incorrect fluid pressure. The hydraulic system relies on a main pump that supplies both steering and work equipment; failure of the main pump often leads to simultaneous loss of steering and lifting capacity.
What undercarriage and wear patterns are typical for this wheel loader?
As a wheel loader, the WA90-3 does not have tracks, but it experiences significant wear on tires, wheel bearings, and axle components. Operators report that tire wear is accelerated in abrasive environments like quarries or aggregate handling. The front and rear axles, differentials, and final drives require regular inspection for leaks and gear wear. The steering system, being a hydraulic articulated steering setup, is prone to wear in the steering cylinder seals and pivot pins. Common wear patterns include leakage at the axle shaft seals and wear in the steering linkage joints. The bucket teeth and cutting edges also show typical wear, with the standard bucket capacity ranging from 0.9 to 1.6 m³ (1.18 to 2.09 cu yd) depending on the attachment.
What are the common engine quirks per series?
The S6D105 engine in the WA90-3/WA95-3 series is robust but sensitive to fuel quality and maintenance intervals. Common quirks include overheating if the cooling package (radiator, hydraulic oil cooler, charge-air cooler) becomes clogged with dust or debris. Owners report that the engine may lose power under heavy load if the air filter is restricted or if the fuel filters are not changed regularly. The engine is emissionized, which may involve specific exhaust treatments; however, specific DEF or SCR details for this older generation are not documented in the provided sources. The engine oil capacity and type are critical; Komatsu recommends specific diesel engine oils meeting Komatsu Engineering Standards. Using incorrect oil can lead to increased wear or overheating.
What are the common electrical/sensor issues?
Komatsu wheel loaders of this era rely on electronic control systems that can be sensitive to voltage fluctuations and ground connections. Common electrical issues include intermittent starting, dashboard failures, or random shutdowns due to faulty sensors or unstable power supplies. Operators have reported issues with the oil diversion warning light staying on for extended periods, which may be related to filter quality or sensor calibration. The hour meter on some Komatsu models can exhibit erratic behavior, counting by 0.1 and then jumping by 0.2 randomly. Ground connections and battery terminals should be checked regularly to prevent false fault codes and starting issues. The machine uses a CAN bus or similar digital communication system for sensor data, so wiring harness damage can cause multiple unrelated fault codes.
What fluids and capacities are specified for this machine?
Komatsu specifies the use of Komatsu Genuine Lubricants and Coolants to meet strict Komatsu Engineering Standards. For the hydraulic system, Komatsu HO (Hydraulic Oil) or equivalent ISO VG46 hydraulic oil is recommended. For the transmission and final drives, Komatsu TO (Powertrain Oil) or AXO (Axle Oil) meeting API GL-4 or TE-ML-05F specifications is required. The engine requires diesel engine oil meeting Komatsu standards, typically SAE 10W or 15W depending on ambient temperature. The cooling system uses Super Coolant AF-NAC. Specific capacities for the engine oil pan, hydraulic system, and axles are not provided in the source text; consult the operation and maintenance manual for the exact fill volumes for your serial range.
What to check when buying a used WA90-3 (S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671)?
When inspecting a used WA90-3 or WA95-3, verify the serial number prefix to ensure you are looking at the correct engine and component configuration. Check the engine for signs of overheating, such as coolant leaks or clogged radiator cores. Inspect the hydraulic system for leaks, especially at the main pump, steering cylinders, and work equipment cylinders. Test all hydraulic functions for smooth operation and adequate power, both cold and hot. Check the transmission for harsh shifting or slippage. Inspect the tires for wear and damage, and check the wheel bearings and axle seals for leaks. Verify the condition of the steering linkage and pivot pins. Check the electrical system for proper operation of all lights, gauges, and warning indicators. Ensure the hour meter is functioning correctly. Have your dealer verify the exact fluid specifications and maintenance history for the specific serial range.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Komatsu WA90-3(S/N HA970051-HA970315 & H20316-H20318; WA95-3 S/N HA980051-HA980668 & H20651-H20671). Related factory variants of the same model family:
WA90-3(S/N H20319-UP; WA95-3 S/N H20672-UP)
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