Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA50-3(S/N 23001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA50-3 is a compact wheel loader designed for light to medium-duty material handling in construction, agriculture, and municipal applications. This specific serial range (S/N 23001-UP) is the Overseas Version, distinct from the North American variants. It is powered by a Komatsu S3D84E-3B, 3-cylinder, turbocharged diesel engine producing 37 hp (27.6 kW) at 2500 rpm. The machine has an operating weight of approximately 8200 lb (3719.5 kg) and a static tipping load of 5830 lb (2644.4 kg). It features a hydrostatic transmission with a maximum travel speed of 9.3 mph (15.0 km/h). Configurations typically include a standard bucket with a heaped capacity of 0.75 to 0.8 yd³ (0.6 m³), though bucket sizes can vary by attachment. The WA50-3 succeeded the WA50-2 series and was later followed by the WA50-6 series, which introduced updated emissions-compliant engines and refined hydraulic systems.
Across the WA50 series generations, the primary changes involved engine emissions compliance, hydraulic system efficiency, and operator comfort. The WA50-3 (S/N 23001-UP) represents a mature, reliable platform with a simple, robust mechanical design that is highly valued in the used market for its ease of repair and parts availability. The S3D84E-3B engine is known for its durability and fuel efficiency in compact applications. In the used and parts market, the WA50-3 remains significant because its components are widely compatible with other WA30/WA40 series machines, and its hydrostatic drive system is simpler to service than modern electronic transmissions. The Overseas Version (S/N 23001-UP) often has specific electrical and emission configurations that differ from the NA version, making accurate serial identification critical for parts ordering and maintenance.
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 WA50-3(S/N 23001-UP) specifications
Engine
| Model | S3D84E-3B |
| Number of Cylinders | 3 |
| Displacement | 91 cu in (1,491 cu cm) |
| Aspiration | Turbocharged |
| Net Power | 37 hp (28 kW) |
| Power Measured @ | 2,500 rpm |
Weights
| Operating Weight | 3,719 kg (8,200 lb) |
| Static Tipping Weight | 5,830 lb (2,644 kg) |
Dimensions
| Length With Bucket On Ground | 14.92 ft (4.55 m) |
| Width Over Tires | 5.42 ft (1.65 m) |
| Height To Top Of Cab | 8.17 ft (2.49 m) |
| Wheelbase | 6.08 ft (1.85 m) |
| Ground Clearance | 1 ft (0.30 m) |
| Hinge Pin - Max Height | 10.25 ft (3.12 m) |
| Reach At Max Lift And Dump | 2.96 ft (0.90 m) |
| Turning Radius | 10.5 ft (3.20 m) |
Performance
| Max Speed - Forward | 9.3 mph (15.0 km/h) |
| Max Speed - Reverse | 9.3 mph (15.0 km/h) |
| Breakout Force | 6,720 lb (3,048 kg) |
| Bucket Capacity - Heaped | 0.75 yd3 (0.57 m3) |
| Dump Clearance At Max Raise | 7 ft (2.13 m) |
| Raise Time | 4.6 sec |
| Dump Time | 1 sec |
| Lower Time | 2.8 sec |
Service capacities (summary)
| Fuel Capacity | 11.9 gal (45.0 l) |
| Hydraulic System Fluid Capacity | 7.4 gal (28.0 l) |
| Engine Oil Fluid Capacity | 4.9 l (1.3 gal) |
| Cooling System Fluid Capacity | 1.5 gal (5.7 l) |
| Front Axle/Diff Fluid Capacity | 1.4 gal (5.3 l) |
| Rear Axle/Diff Fluid Capacity | 1.4 gal (5.3 l) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA50-3(S/N 23001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (with filter) | 4.9 l (1.3 gal) | Komatsu Diesel Engine Oil (SAE 15W-40 recommended for most climates; SAE 5W-30 or 10W-30 for cooler climates) |
| Cooling System | 5.7 l (1.5 gal) | Komatsu Super Coolant AF-NAC (concentrate, mixed 50/50 with distilled/demineralized water) |
| Fuel Tank | 45.0 l (11.9 gal) | Standard diesel fuel |
| Transmission/Powertrain | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Final Drives | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System and Tank | 28.0 l (7.4 gal) | Komatsu Hydraulic Oil HO (ISO VG 46; SAE 10W for cooler climates) |
| Front Axle/Differential | 5.3 l (1.4 gal) | Komatsu Axle Oil AXO 80W (API GL-4) |
| Rear Axle/Differential | 5.3 l (1.4 gal) | Komatsu Axle Oil AXO 80W (API GL-4) |
| Grease | N/A | General purpose lithium-based grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WA50-3(S/N 23001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the WA50-3(S/N 23001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil, hydraulic oil, and HST fluid levels daily. Use Komatsu EO for the engine and Komatsu TO for the hydraulic system. Check KOWA (Komatsu Oil Wear Analysis) results at 500-hour intervals to detect early wear in the engine and transmission.
Corrective & Common Repairs
Common issues include worn steering cylinders and leaking axle seals. Inspect the HST charge pressure and adjust if travel speed is inconsistent. Check the fan belt tension every 50 hours; a loose belt causes overheating. Replace the fuel filter every 250 hours to protect the S3D84E-3B injection pump. Inspect the brake disc wear and adjust the parking brake linkage if the pedal travel is excessive. Check the wheel hub bolts for tightness to prevent bearing failure. Replace worn bucket cutting edges to maintain breakout force.
Overhaul & Rebuild Points
At 2000 hours, change the transfer case and axle oil to prevent gear wear. Inspect the engine valve clearance and adjust if necessary to maintain compression. Check the HST pump and motor pressures; low pressure indicates internal wear. Inspect the hydraulic pump swash plate and piston shoes for scoring. Check the final drive gears and bearings for backlash. Replace the hydraulic tank breather if clogged to prevent pressure buildup. Inspect the structural frame for cracks at high-stress points like the hinge pin and axle mounts.
Seasonal & Environment Servicing
In cold weather, use low-viscosity engine oil and hydraulic fluid to ensure proper flow. Drain the fuel water separator more frequently to prevent ice formation. Use Komatsu Super Coolant mixed with distilled water to prevent freezing. In hot weather, clean the radiator and oil cooler fins daily to prevent overheating. Check the coolant level more often due to increased evaporation. In dusty environments, clean the air cleaner dust cup every 10 hours and replace the element more frequently. Inspect the tire pressure daily as temperature changes affect inflation.
WA50-3(S/N 23001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129100-55650 | Element,Fuel Filter | Fuel system service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 07000-02075 | O-Ring,Steering Oil Filter | Lubrication service | Check fitment → |
| 363-18-31470 | Element,Hydraulic | Scheduled service item | Check fitment → |
| YM121120-12900 | Element | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WA50-3(S/N 23001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure or engine control drive system circuit malfunction | Faulty ECM power connections, blown fuses, or damaged ground wires | Inspect ECM power connections, fuses, and ground wires |
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA111 | Engine controller internal fault | Internal ECM failure | Replace or reprogram the ECM |
| CA441 | Battery voltage too low | Weak battery or charging system failure | Replace the battery or alternator and check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator overcharging | Replace the alternator or battery and check the voltage regulator |
| CA122 | Intake air pressure sensor feedback voltage too high | Sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Low coolant, faulty fan belt, or blocked radiator fins | Check radiator fins, fan belt, and coolant level |
| B@HANS | Hydraulic oil overheating | Contaminated oil, clogged filter, or cooler fan failure | Change hydraulic filter and oil; check cooler fan |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA50-3(S/N 23001-UP) attachments & work tools
Standard Buckets
Factory specifications list a heaped capacity of 0.75 cubic yards (0.6 cubic meters) with a width of 5.58 feet (1.69 meters). Alternative data sources cite a rated capacity of 1 cubic yard (0.6 cubic meters) and a width of 6 feet (1.82 meters). The bucket provides a breakout force of 6720 lbs (3048 kg).
Quick Attach Conversions
Aftermarket kits exist to convert the standard pin-on bucket to a universal skid steer quick attach interface. These heavy-duty faceplates mount to the existing bucket structure and are rated for a 5500 lbs lift capacity, which is not the full machine lift capacity. Installation requires welding the female conversion plate to the existing bucket.
Hydraulic & Coupler Options
The machine utilizes a hydraulic system with a relief valve setting of 2990 psi and a pump flow of 11.4 gallons per minute. Aftermarket suppliers list hydraulic kits and couplers as available attachment components for this model.
Guarding & Safety Options
Factory documentation references optional seat belts and ROPS (Roll-Over Protective Structure) components for the cab. The operation manual includes sections for equipment with a cab, detailing rear window and switch configurations.
All WA50-3(S/N 23001-UP) assemblies by section
Every catalogued assembly group for the Komatsu WA50-3(S/N 23001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory And Tool
Komatsu : Wa50-3(S/N 23001-Up) : Accessory And Tool : Spare Parts
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 36***70 | Element,Hydraulic | 1 |
| YM***50 | Element,Fuel Filter | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Accessory And Tool : Tool (North America Spec.)
| 09***12 | Wrench? 10x12 | 1 |
| 09***17 | Wrench? 14x17,14x17 | 1 |
| 09***22 | Wrench? 19x22,19x22 | 1 |
Cooling System
Komatsu : Wa50-3(S/N 23001-Up) : Cooling System : Radiator
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 8 |
| 01***16 | Bolt - Starting Motor Ground Cable | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Cooling System : Radiator Piping
| 07***35 | Clamp | 4 |
| 36***10 | Hose,Inlet | 1 |
| 36***20 | Hose,Outlet | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Cooling System : Reserve Tank And Mount Parts
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 07***15 | Clip | 2 |
| 36***10 | Hose | 1 |
Electrical System
Komatsu : Wa50-3(S/N 23001-Up) : Electrical System : Back-Up Alarm (North America Spec.)
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 7 |
Komatsu : Wa50-3(S/N 23001-Up) : Electrical System : Battery
| 08***00 | Terminal? (+),(10l) (Not Shown) | 1 |
| 08***01 | Terminal? (-),(20l) (Not Shown) | 1 |
| 08***08 | Battery? Dry(75d31l) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Electrical System : Battery Mount Parts
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***07 | Nut,Lock | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Electrical System : Instrument Panel (Master Key Type)
| 01***08 | Screw | 2 |
| 01***14 | Screw,(With Joy Stick Steering) | 2 |
| 01***16 | Screw,(For Joy Stick Steering) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Electrical System : Vehicle Lamp And Horn (North America Spec.)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
| 01***25 | Screw - Antenna Mounting | 4 |
| 01***35 | Screw, Mount Lens | 8 |
Engine Related Parts
Komatsu : Wa50-3(S/N 23001-Up) : Engine Related Parts : Air Cleaner Connection
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 07***89 | Clamp,(D31s) | 1 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 5 |
Komatsu : Wa50-3(S/N 23001-Up) : Engine Related Parts : Damper
| 01***40 | Bolt,Reamer | 6 |
| 04***12 | Pin,Spring (See Fig.0201) | 6 |
| 20***10 | Rubber | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Engine Related Parts : Engine Mounting Parts
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Engine Related Parts : Exhaust Connection
| 01***25 | Bolt - Relay Mounting | 4 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 1 |
Fuel Tank And Related Parts
Komatsu : Wa50-3(S/N 23001-Up) : Fuel Tank And Related Parts : Fuel Line
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 04***10 | Clip,See Fig. K4010-05a0 | 2 |
| 04***10 | Clip | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Fuel Tank And Related Parts : Fuel Tank And Piping
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***12 | Screw,(Additional Sun Visor) | 5 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 5 |
Guard
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Counter Weight (North America Spec.)
| 01***90 | Bolt | 4 |
| 01***60 | Flat Washer - M20 (Hardened) | 4 |
| 41***13 | Pin | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Floor Frame Cover
| 01***20 | Bolt,(Forwarded Individually Parts) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 36***21 | Sheet,R.H | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Front Fender
| 01***25 | Bolt - Relay Mounting | 4 |
| 01***06 | Nut | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Front Guard
| 01***14 | Screw | 2 |
| 01***12 | Screw,(Wa320-1m?1p) | 4 |
| 01***16 | Screw,(For Joy Stick Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Hood (Mount) (North America Spec.)
| 01***12 | Bolt,(See Fig. K0210-16a0) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Hood (North America Spec.)
| 01***20 | Screw | 4 |
| 01***20 | Screw | 4 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Mirror (For Canopy)
| 01***40 | Screw | 4 |
| 01***09 | Nut,(With Body Positioner) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Rear Grille (North America Spec.)
| 01***25 | Bolt - Relay Mounting | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 36***20 | Grille | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Guard : Under Guerd
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 36***10 | Sheet | 1 |
Hydraulic System
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : 2-Spool Control Valve
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
| (3***1) | Valve Ass'Y | 1 |
| (3***0) | Valve Ass'Y,Power Take-Off | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Delivery Line)
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Front Attachment Line)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***07 | Nut,(With Body Positioner) | 12 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Lift And Dump Cylinder Line)
| 01***40 | Bolt,(Shim 3-Piece) | 2 |
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
| 07***18 | O-Ring, Divider Valve Mounting | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Pressure Pick-Up Line)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 5 |
| 01***35 | Bolt, Mount Bracket To Floor | 3 |
| 01***09 | Nut,(For Japan) | 6 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Return Line)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
| 07***18 | O-Ring, Divider Valve Mounting | 1 |
| 07***34 | O-Ring,(For Front Attachment) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Piping (Steering Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Hydraulic Tank
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 3 |
| 07***34 | O-Ring,(F2320-62a1 -3 ) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Hydraulic System : Steering Valve
Main/Revolving Frame And Related Parts
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Bar Rock And Cover
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 36***60 | Pin,Snap | 2 |
| 36***10 | Bar | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Bar Rock And Cover (For Attachment)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 36***60 | Pin,Snap | 2 |
| 36***10 | Bar | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Front Frame
| 01***85 | Bolt | 4 |
| 01***15 | Nut,(For Slag Handling) | 4 |
| 01***45 | Washer,(Without R.O.P.S.) | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Hinge Pin
| 01***35 | Bolt,(F4320-52a0 -5 ) | 8 |
| 01***55 | Bolt,(Not Used For Chip Dozer) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Rear Axle Support
| 01***80 | Bolt,(B) | 4 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Rear Frame
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***70 | Screw | 2 |
| 07***18 | Plug,(With Extinguisher) (D31p) | 6 |
Komatsu : Wa50-3(S/N 23001-Up) : Main/Revolving Frame And Related Parts : Steering Cylinder
| 07***00 | Fitting, Grease - Upper Hinge Pin | 1 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 1 |
| (4***1) | Cylinder Group,Steering | 1 |
Marks And Plates
Komatsu : Wa50-3(S/N 23001-Up) : Marks And Plates : Marks And Plates (North America Spec.)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate, Safety, Safety Bar | 1 |
| 09***00 | Plate, Safety, Keep Out Of Working Area | 2 |
Operator'S Compartment And Control System
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Accelerator Pedal And Linkage
| 01***25 | Screw | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Accelerator Pedal And Linkage (Lever) (For Heater)
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***23 | Washer,(With Car Heater) | 1 |
| 04***53 | Pin,Cotter (For Radio Control) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Additional Heater
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 6 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Blower
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***65 | Bolt,(Used With Pin Puller) | 2 |
| 01***10 | Screw (Op) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Brake Link) (1/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Brake Link) (1/2) (For Hand Throttle)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Brake Link) (2/2)
| 01***16 | Bolt - Box Mounting | 3 |
| 01***22 | Bolt | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Brake Link) (2/2) (For Hand Throttle)
| 01***16 | Bolt - Box Mounting | 3 |
| 01***22 | Bolt | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Parking Brake Release)
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***23 | Washer,(With Car Heater) | 1 |
| 04***20 | Pin, Spring Retainer | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Brake Control (Pedal And Lever)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 6 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Canopy
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 16 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Canopy (For Back Hoe)
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
| 01***16 | Bolt - Starting Motor Ground Cable | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Canopy (With Front Window)
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Canopy (With Front Window) (Front Window) (1/2)
| 01***40 | Bolt - M6 X 40lg | 1 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***08 | Screw - Holder | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Canopy (With Front Window) (Front Window) (2/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (1/3) (Heater)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (2/3) (Air Hose And Wiring)
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (2/3) (Air Hose And Wiring) (For Additional Blower)
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
| 01***04 | Nut,(For Air Conditioner Less) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (2/3) (Air Hose And Wiring) (For Additional Heater)
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (2/3) (Air Hose And Wiring) (For Snow Removal)
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (3/3) (Water Line)
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 09***00 | Valve | 1 |
| 09***06 | Hose | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Car Heater And Defroster (3/3) (Water Line) (For Additional Heater)
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 07***23 | Clamp | 4 |
| 07***59 | Clamp,See Fig. K4010-05a0 | 10 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (For Additional Heater And Defroster)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (For Back Hoe)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (For Back Hoe? Heater And Defroster)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (For Heater And Defroster)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (Sheet)
| 36***20 | Sheet | 1 |
| 36***10 | Sheet | 1 |
| 36***20 | Sheet | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Frame (Snow Removal Spec.)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Mat
| 36***80 | Mat,Floor | 1 |
| 41***70 | Plate | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Mat (For Heater)
| 36***20 | Mat,Floor(For Car Heater And Def.) | 1 |
| 36***10 | Mat,(For Blower) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Floor Mat (For Tachograph)
| 36***20 | Mat,Floor (With Tachograph) | 1 |
| 36***30 | Mat,Floor (With Tachograph) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Forward And Reverse Control Lever
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
| 36***60 | Shift Lever Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Hst Inching Control Line
| 01***30 | Screw | 1 |
| 01***45 | Bolt | 2 |
| 01***22 | Bolt | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (1/8) (Front Window)
| 01***40 | Bolt - M6 X 40lg | 1 |
| 01***08 | Screw - Holder | 1 |
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (2/8) (Side Window)
| 01***16 | Screw | 2 |
| 01***12 | Screw | 4 |
| 01***16 | Screw | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (3/8) (Roof? Room Mirror And Room Lamp)
| 01***12 | Screw,(Additional Sun Visor) | 8 |
| 01***20 | Screw | 4 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (4/8) (Rear Door)
| 01***20 | Screw | 4 |
| 01***10 | Screw,(For Lighter) | 8 |
| 01***12 | Screw,(Additional Sun Visor) | 5 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (5/8) (Rear Door Mount)
| 01***25 | Screw | 8 |
| 01***14 | Bolt - Plate Mounting | 4 |
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (6/8) (L.H. And R.H. Door) (1/2)
| 01***20 | Screw | 8 |
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (7/8) (L.H. And R.H. Door) (2/2) (Handle And Lock)
| 01***10 | Screw,R.H. Door | 1 |
| 01***16 | Screw,(With Ashtray) | 2 |
| 01***16 | Screw | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (8/8) (Cab And Wrok Lamp)
| 01***12 | Screw | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 08***08 | Grommet,(Without Beacon Lamp) | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Electrical)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Cab Mount
| 01***55 | Bolt,(See Service News) | 4 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 4 |
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Seat
| 01***06 | Nut | 4 |
| 36***01 | Seat Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Operator'S Seat (For Back Hoe)
| 01***40 | Bolt | 2 |
| 01***30 | Bolt,(Water Separator Spec.) | 4 |
| 01***15 | Nut | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Rops Canopy
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***45 | Bolt, Mounting Cranking Motor | 4 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 14 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Seat Belt
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***06 | Nut | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Steering Wheel And Column
| 01***45 | Bolt, Mounting Cranking Motor | 1 |
| 01***15 | Bolt | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Weindow Washer
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 36***60 | Bracket | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Hand Throttle Cable)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
| 01***08 | Washer,(For Fixed Type Ripper) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Hand Throttle Link)
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 07***18 | O-Ring, Divider Valve Mounting | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Lever)
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 1 |
| 01***25 | Screw | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Lever) (For Front Attachment)
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 1 |
| 01***25 | Screw | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Lever) (For Hand Throttle)
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 1 |
| 01***25 | Screw | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Link)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Operator'S Compartment And Control System : Work Equipment Control (Link) (For Front Attachment)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
S3d84-5x-Ab Engine S/N 00461-Up
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Air Cleaner (Single Element)
| YM***60 | Bolt,Wing | 1 |
| YM***00 | Body | 1 |
| YM***03 | Seal,Seal | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Air Intake Manifold And Connection
| YM***02 | Bolt Plated | 4 |
| YM***02 | Screw | 4 |
| YM***00 | Heater,Intake Air | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Alternator (40a) (Inner Parts)
| YM***00 | Bearing,Ball | 1 |
| YM***80 | Spring | 2 |
| YM***50 | Nut | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Alternator And Mounting (40a)
| YM***52 | Screw | 1 |
| YM***30 | Plate,Adjust | 1 |
| YM***02 | Nut | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Camshaft And Tappet
| YM***80 | Camshaft Ass'Y | 1 |
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Crankshaft
| YM***80 | Parallel Pin | 1 |
| YM***50 | Pulley,Crank | 1 |
| YM***01 | Gear,Crank | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Cylinder Block
| YM***30 | Main Metal Ass'Y (Std) | 4 |
| YM***50 | Plug | 1 |
| YM***20 | Screw | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Cylinder Block Accsessory
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Guide,Oil Gauge | 1 |
| YM***50 | Oil Pressure Transmitter | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Cylinder Head
| YM***30 | Valve,Exhaust | 3 |
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***80 | Retainer, Spring | 6 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Cylinder Head Cover
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***20 | Cover | 1 |
| YM***00 | Screw | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Drive Gear
| YM***02 | Screw | 3 |
| YM***00 | Washer,Spring | 1 |
| YM***01 | Gear,Injection | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Electrical Parts (Forwerded Individually Parts)
| YM***10 | Relay,Stop Solenoid | 1 |
| YM***00 | Relay,Safety | 1 |
| YM***20 | Time Switch | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Exhaust Manifold
| YM***30 | Bolt | 6 |
| YM***00 | Manifold,Exhaust | 1 |
| YM***10 | Gasket,Exhaust Manifold | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Flywheel And Flywheel Housing
| YM***00 | Gear,Ring | 1 |
| YM***70 | Screw | 6 |
| YM***80 | Parallel Pin | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Front Cover
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***40 | O-Ring (Kit) | 4 |
| YM***00 | Clip,Breather Hose | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Front Hanger
| YM***00 | Suspension Plate | 1 |
| YM***42 | Screw | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Fuel Filter And Piping
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Fuel Injection Pump And Piping
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***02 | Bolt Plated | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Fuel Nozzle And Spill Hose
| YM***20 | Spring | 1 |
| YM***80 | Clamp | 1 |
| YM***10 | Pipe | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Gasket Kit
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Lubricating Oil Pump
| YM***20 | Spring | 1 |
| YM***41 | Gasket (Kit) | 1 |
| YM***30 | Valve,Relief | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Muffler And Mounting
| YM***02 | Screw | 4 |
| YM***20 | Stud | 4 |
| YM***11 | Cover | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Oil Filter And Oil Cooler
| YM***30 | Tube | 1 |
| YM***02 | Bolt Plated | 3 |
| YM***20 | Plug,Drain(Without Oil Cooler Type) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Oil Pan
| YM***70 | Oil Pan Ass'Y | 1 |
| YM***40 | Plug | 1 |
| YM***52 | Screw | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Piston And Connecting Rod
| YM***00 | Screw | 2 |
| YM***00 | Crank Pin Metal A. (Std) | 1 |
| YM***80 | Piston Ass'Y | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Rear Hanger
| YM***00 | Suspension Plate | 1 |
| YM***42 | Screw | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Rocker Arm
| YM***41 | Rocker Arm Shaft A | 1 |
| YM***50 | Rocker Arm Ass'Y | 6 |
| YM***70 | Support | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Starting Motor (Inner Parts)
| YM***50 | Pinion Ass'Y,Pinion | 1 |
| YM***20 | Housing,Center | 1 |
| YM***90 | Spring,Brush | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Starting Motor And Mounting
| YM***52 | Bolt Plated | 2 |
| YM***20 | Cover | 1 |
| YM***60 | Cable,Engine Side | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Tool
| YM***20 | Flex Horn (Option.) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Turbocharger And Oil Piping
| YM***01 | Pipe,Outlet | 1 |
| YM***60 | O-Ring (Kit) | 1 |
| YM***50 | Pipe,Oil | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Water Pump And Cooling Fan
| YM***40 | Plug | 2 |
| YM***22 | Screw | 2 |
| YM***01 | Thermostat | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : S3d84-5x-Ab Engine S/N 00461-Up : Water Separator
| YM***00 | Water Separator A | 1 |
| YM***60 | O-Ring (Kit) | 1 |
| YM***50 | O-Ring (Kit) | 1 |
Service Kit And Component Parts
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 2-Spool Control Valve (1/2)
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 2-Spool Control Valve (1/2) (With Pressure Pick-Up Line)
| 36***20 | Spool Section Ass'Y | 1 |
| 36***50 | Valve Ass'Y | 1 |
| 42***60 | Inlet Section Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 2-Spool Control Valve (2/2)
| 36***70 | Plate | 1 |
| 36***50 | Spool Section Ass'Y | 1 |
| 36***30 | Stud,Tie | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 2-Spool Control Valve (2/2) (With Pressure Pick-Up Line)
| 36***50 | Spool Section Ass'Y | 1 |
| 36***30 | Stud,Tie | 2 |
| 36***40 | Stud,Tie | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 3-Spool C0ntrol Valve (1/2)
| 36***70 | Plate | 2 |
| 36***20 | Spool Section Ass'Y | 1 |
| 36***20 | Spool Section Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 3-Spool C0ntrol Valve (1/2) (With Pressure Pick-Up Line)
| 36***20 | Spool Section Ass'Y | 1 |
| 36***20 | Spool Section Ass'Y | 1 |
| 36***60 | Valve Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 3-Spool C0ntrol Valve (2/2) (With Pressure Pick-Up Line)
| 36***50 | Spool Section Ass'Y | 1 |
| 36***40 | Rod,Tie | 2 |
| 36***50 | Rod,Tie | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : 3-Spool Control Valve (2/2)
| 36***70 | Plate | 1 |
| 36***50 | Spool Section Ass'Y | 1 |
| 36***40 | Rod,Tie | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Dump Cylinder (Inner Parts)
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***26 | Nut,Nylon | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Lift Cylinder (Inner Parts)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***26 | Nut,Nylon | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Gear Pump Inner Parts)
| 02***53 | O-Ring | 1 |
| UC***21 | Gear | 1 |
| UC***-0 | Pump Ass'Y,Gear | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Inner Parts)
| 01***25 | Screw | 2 |
| 36***02 | Pump Ass'Y,(A4vg28da-931-0) | 1 |
| UC***96 | Orifice | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts)
| 01***12 | Bolt | 11 |
| 02***09 | O-Ring | 2 |
| 41***80 | O-Ring | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Control And Cut-Off Valve)
| 02***15 | O-Ring | 2 |
| UC***59 | Bolt | 4 |
| UC***82 | Orifice | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Cover And Relief Valve)
| 01***60 | Bolt | 4 |
| 02***09 | O-Ring | 2 |
| 02***88 | O-Ring | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Leaning Cylinder)
| 01***20 | Bolt (Itl) | 8 |
| 02***09 | O-Ring | 1 |
| 02***51 | O-Ring (Kit) | 4 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Rotary Group)
| 04***12 | Ring, Snap (4) | 1 |
| 04***25 | Ring,(W/Emergency Steering) (1m?1d) | 1 |
| UC***98 | Plate,Control | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Priority Valve
| 36***00 | Valve Ass'Y,Priority | 1 |
| 42***10 | Service Kit,Priority Valve | 1 |
| 42***70 | Ball | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Steering Cylinder (Inner Parts)
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Steering Valve
| 36***00 | Steering Valve Ass'Y | 1 |
| 36***20 | Control Ass'Y | 1 |
| 36***30 | Spring | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Travel Motor (Inner Parts)
| 04***30 | Ring, Snap, Snap-Ring | 1 |
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 36***01 | Motor Ass'Y,(A6v59da-974-1) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Service Kit And Component Parts : Travel Motor (Inner Parts) (Control Group)
| 01***35 | Bolt,Snap | 8 |
| 01***45 | Bolt | 4 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
Suspension And Wheel Related Parts
Komatsu : Wa50-3(S/N 23001-Up) : Suspension And Wheel Related Parts : Rim And Tire (For 15.5/60-18-8pr Tubeless Tire)
| 09***20 | Cap, Tire Valve | 4 |
| 36***50 | Valve Ass'Y,(Service Only) Z0600 | 4 |
| 36***10 | Tire,(Tubeless) | 4 |
Torque Converter And Transmission
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Front Axle (Defferential) (Except Japan)
| 01***70 | Bolt, Spacer | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 7 |
| 01***20 | Screw | 14 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Front Axle (Final Drive? L.H.) (Except Japan)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Front Axle (Final Drive? R.H.) (Except Japan)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Front Axle And Wheel Munting Parts
| 01***40 | Bolt | 12 |
| 01***60 | Flat Washer - M20 (Hardened) | 12 |
| (4***0) | Front Axle Ass'Y,(For U.S.A.) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Front Drive Shaft
| 36***00 | Drive Shaft Ass'Y,Front | 1 |
| 36***50 | Shaft | 1 |
| 41***20 | Spider Ass'Y | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Hst Piping
| 01***40 | Bolt | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Rear Axle (Defferential) (Except Japan)
| 01***70 | Bolt, Spacer | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 7 |
| 01***20 | Screw | 14 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Rear Axle (Final Drive? L.H.) (Except Japan)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Rear Axle (Final Drive? R.H.) (Except Japan)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Rear Drive Shaft
| 36***00 | Drive Shaft Ass'Y,Rear | 1 |
| 36***50 | Yoke | 1 |
| 41***20 | Spider Ass'Y | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Reart Axle And Wheel Munting Parts
| 01***40 | Bolt | 12 |
| 01***60 | Flat Washer - M20 (Hardened) | 12 |
| (4***0) | Rear Axle Ass'Y | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Transfer (1/2)
| 01***12 | Bolt - M8 - 1.25 X 12 | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Transfer (2/2)
| 01***16 | Bolt | 1 |
| 04***80 | Pin | 1 |
| 04***87 | Ball | 3 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Transfer (Filter)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***00 | Bolt,(For Front Brake Release) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Transfer (Pump And Motor Drain Line)
| 01***35 | Bolt | 2 |
| 01***40 | Bolt,Reamer | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Torque Converter And Transmission : Transfer Mounting Parts
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 1 |
| 01***05 | Capscrew | 5 |
Work Equipment
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Bucket Cylinder
| (4***0) | Cylinder Group,Dump | 1 |
| (4***0) | Cylinder Group,Dump (Natural Yellow Coating) | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Bucket Positioner
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Bucket Tooth
| 02***55 | Bolt (Only For Bucket With Cutting Edge) | 14 |
| 02***15 | Nut (Op) | 14 |
| 10***11 | Tooth (Op) | 7 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Bucket? 0.6m3
| 36***30 | Edge (Welded) | 1 |
| 42***80 | Plate (Welded) | 2 |
| 42***10 | Bucket | 1 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Cutting Edge
| 01***45 | Washer,(For Travel Motor) (Not Show) | 7 |
| 02***50 | Bolt | 7 |
| 02***15 | Nut (Op) | 7 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Lift Arm And Bellcrank
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Lift Arm And Bellcrank (With Front Attachment)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 13 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 11 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Lift Cylinder
| (4***0) | Cylinder Group,Lift | 2 |
| (4***0) | Cylinder Group,Lift (Natural Yellow Coating) | 2 |
Komatsu : Wa50-3(S/N 23001-Up) : Work Equipment : Mark And Plate (Back Hoe)
| 10***77 | Plate? Safety,Safety Z0800 | 1 |
WA50-3(S/N 23001-UP) serial number reference
The Product Identification Number (PIN) plate is located on the front frame, on the right-hand side of the articulation joint. For the WA50-3, read the first three characters of the 17-character ISO PIN stamped on this plate; these characters (KMTWA) identify the Komatsu wheel loader family. The remaining digits specify the model, generation, and regional configuration.
| Prefix | Identifies | Notes |
|---|---|---|
| KMTWA | Overseas Version | Identifies the WA50-3 family for export markets. The 'WA' segment confirms the wheel loader family. The specific configuration (engine, emissions) is determined by the subsequent digits in the 17-character PIN. This prefix covers the S/N 23001-UP range for the standard overseas WA50-3. The machine plate is located on the front frame, on the right-hand side of the articulation joint. |
| KMTWA | North America Version | Identifies the WA50-3NA variant for the North American market. While the prefix is the same, the internal digits differ to reflect the S3D84E (Emission) engine and regional compliance. Verify the specific digit sequence against the machine's emissions plate. The machine plate is located on the front frame, on the right-hand side of the articulation joint. |
Frequently asked questions
What engine does the Komatsu WA50-3 (S/N 23001-UP) use?
The Komatsu WA50-3 (S/N 23001-UP) uses the Komatsu S3D84E-3B engine. It is a 3-cylinder, turbocharged diesel engine with a displacement of 91 cu in (1491.2 cc) and a net power output of 37 hp (27.6 kW) at 2500 rpm.
What is the operating weight of the Komatsu WA50-3?
The operating weight of the Komatsu WA50-3 is approximately 8200 lb (3719.5 kg). This weight can vary slightly depending on the specific configuration, bucket size, and optional attachments installed on the machine.
What model replaced the Komatsu WA50-3?
The Komatsu WA50-3 was succeeded by the Komatsu WA50-6 series. The WA50-6 introduced updated engines to meet newer emissions standards, refined hydraulic systems, and improved operator comfort features compared to the WA50-3.
What WA50-3(S/N 23001-UP) owners discuss
What engine model and aspiration type does the Komatsu WA50-3(S/N 23001-UP) use?
The machine uses a Komatsu S3D84E-3B engine. It is a 3-cylinder, turbocharged diesel with a displacement of 91 cu in (1,491 cu cm). Net power is rated at 37 hp (28 kw) at 2,500 rpm. Factory spec sheet.
What are the typical hydraulic system behaviors and relief settings for this loader?
The hydraulic system operates with a main relief valve setting of 2,990 psi. The pump flow capacity is 11.4 gal/min (43 lpm). Cycle times are approximately 4.6 seconds for raise, 1 second for dump, and 2.8 seconds for lower. Owners note that hydraulic performance is sensitive to oil temperature; functions may slow significantly when the oil is hot due to viscosity loss. Operation and maintenance manual.
What are the known powertrain and transmission characteristics?
The WA50-3 utilizes a hydrostatic transmission. Maximum travel speed is 15 kph (9.3 mph) in both forward and reverse. The system is designed for smooth operation and fuel efficiency.
What are the common undercarriage and wear patterns for this machine type?
As a compact wheel loader, the WA50-3 relies on tire traction rather than tracks. Common wear points include front axle and rear axle differential seals, which are prone to leakage if fluid levels are low. The hydrostatic transmission and final drives are subject to wear if hydraulic oil is contaminated or overheated. Owners report that the machine is generally durable but requires strict adherence to hydraulic fluid specifications to prevent premature pump and motor wear. Komatsu dealer advice.
What are the common electrical or sensor issues reported by operators?
Operators report intermittent dashboard failures, erratic hour meter readings, and random shutdowns. These issues are often traced to poor ground connections between the cab and the machine frame, or wiring faults to the control panel.
What are the key fluid capacities and specifications for maintenance?
Fluid capacities vary by configuration. Fuel capacity is 45 l (11.9 gal). Hydraulic system fluid capacity is 28 l (7.4 gal). Engine oil capacity is 5 l (1.3 gal). Cooling system capacity is 6 l (1.5 gal). Front and rear axle/differential fluid capacities are 5 l (1.4 gal) each.
What should be checked when buying a used WA50-3(S/N 23001-UP)?
Check the hydraulic oil for water contamination, which reduces lubrication and causes heat. Verify the engine starts cold and holds RPM under load. Inspect the cab ground wire connection to ensure the dashboard functions correctly. Check for leaks at the front and rear axle differentials. Verify the hydraulic pump flow by testing cycle times. Have your dealer verify the engine compression and hydraulic pump pressure before purchase.
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 WA50-3(S/N 23001-UP). Related factory variants of the same model family:
WA50-3(S/N 20001-22999)
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