Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA50-3NA (S/N 20001-up, North America) is a compact wheel loader in the roughly 3.5-4 tonne class, built around a Komatsu S3D84E-3B 3-cylinder turbocharged diesel producing about 27.6 kW (37 hp) at 2,500 rpm and driving through a hydrostatic (HST) transmission rather than a torque-converter powershift. Operating weight for this North America configuration runs about 3,720 kg (8,200 lb). This Dash-3 generation was built through the 2000s; no dedicated WA50-1 or WA50-2 predecessor was marketed in North America in this size class, and the line was eventually followed by the similarly sized, similarly powered WA50-6. Komatsu offered it as a general-purpose bucket loader (about 0.6 m³ heaped) with a pin-on, non-quick-attach work-tool mount, plus pallet forks and light attachments for landscape, nursery, and tight-site work, all on a common ROPS-cab chassis.
This North America-spec S/N 20001-up range is built to North America specification. The WA50-6 that eventually followed kept the same compact-loader footprint and horsepower class but moved to a newer engine generation, leaving the Dash-3's fully mechanical, ECM-free fuel system as a point of difference still valued today: simpler field diagnosis, no electronic fault-code dependency, and a small-diesel parts base shared with same-era Komatsu mini excavators and a compact skid steer. That shared parts lineage, combined with steady demand for sub-4-tonne HST loaders in nursery, landscape, and municipal yard work, keeps used WA50-3NA units and their parts moving in the market even though the model itself has been out of production for years.
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 WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) specifications
Engine
| Engine model | Komatsu S3D84E-3B, turbocharged inline-3 diesel |
| Net power | 27.6 kW (37 hp) @ 2,500 rpm |
| Displacement | 1.5 L (1,491 cc) |
| Cylinders | 3 |
| Emissions certification | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating weight | 3,720 kg (8,200 lb) |
| Static tipping load (full turn) | approx. 2,645 kg (5,830 lb), single-source figure |
| Shipping weight | Not published for this configuration |
Dimensions
| Overall length (bucket on ground) | 4.55 m (14 ft 11 in) |
| Overall width, over tires | 1.65 m (5 ft 5 in) |
| Overall height, top of cab | 2.49 m (8 ft 2 in) |
| Wheelbase | 1.85 m (6 ft 1 in) |
| Ground clearance | 0.30 m (1 ft 0 in) |
| Turning radius, outside | 3.2 m (10 ft 6 in) |
Performance
| Travel speed, forward and reverse | 15 km/h (9.3 mph) |
| Bucket breakout force | approx. 3,050 kg (6,720 lb), single-source figure |
| Bucket capacity, heaped | 0.57 m³ (0.75 yd³); some published listings round this to 0.6 m³ (1 yd³) — varies by source |
Service capacities (summary)
| Fuel tank | 45 L (11.9 gal) |
| Hydraulic system | 28 L (7.4 gal) |
| Engine oil, with filter | 4.9 L (1.3 gal) |
| Cooling system | 5.7 L (1.5 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine oil (crankcase, incl. filter) | 4.9 L (1.3 US gal) | Komatsu genuine diesel engine oil (EO10W-30 / EO15W-40 grade), selected by ambient temperature per the OMM's viscosity chart: SAE10W in the coldest range, SAE10W-30 or SAE30 in moderate ranges, SAE15W-40 or SAE40 in warmer ranges. |
| Cooling system (radiator + engine block) | 5.7 L (1.5 US gal) | Komatsu genuine supercoolant, ethylene-glycol long-life type (premixed AF-NAC or AF-ACL concentrate diluted to spec), used year-round with no seasonal switch. |
| Fuel tank | 45 L (11.9 US gal) | ASTM D975 No. 2-D diesel fuel; No. 1-D or a winter-blend diesel in cold climates below roughly -10 deg C. Use low/ultra-low-sulfur diesel matching the engine's emissions tier. |
| Hydraulic system tank (shared with HST drive circuit) | 28.0 L (7.4 US gal) | Komatsu genuine hydraulic oil, graded by ambient temperature on the same type of chart as engine oil. This machine's hydrostatic transmission and loader/steering hydraulics draw from one shared tank, so the OMM does not list a separate transmission-fluid line for this model. |
| Front axle/differential (incl. final drive) | 5.3 L (1.4 US gal) | Komatsu genuine axle oil, gear-oil type formulated for wet-brake compatibility, single multigrade suited to the axle housing's operating range. |
| Rear axle/differential (incl. final drive) | 5.3 L (1.4 US gal) | Same Komatsu genuine wet-brake-compatible axle oil as the front axle. |
| Grease (chassis and pin/bushing points) | Not a filled reservoir - lubricated per point per the OMM's lubrication chart | Komatsu genuine multipurpose chassis grease, NLGI No. 2, lithium-base (molybdenum-disulfide-fortified grease at heavy-duty pin/bushing joints where called out). |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) beyond the schedule
Predictive maintenance & fluid analysis
The HST drive, steering, and loader hydraulics on this WA50-3NA share one 28 L tank, so hydraulic oil condition affects three systems at once — sample it at every engine-oil interval, not only when the machine feels sluggish. The mechanically injected S3D84E-3B carries no ECM to flag fuel dilution or injector wear, so oil analysis is the earliest warning of a sticking injection pump. Pull front and rear axle oil samples too; water or metal in a wet-brake axle shows up in analysis long before it reaches the pedal.
Corrective & common repairs
Contaminated fuel is the most common corrective job on this small diesel: dirt or water sticks injection-pump plungers, causing rough running or a no-start, and usually means pulling and rebuilding the pump rather than a quick fix. A no-heat glow-plug complaint is more often the glow relay or timer cutting power early than a failed element — check both before condemning plugs. Neutral creep on the HST traces to the swashplate's mechanical-to-hydraulic neutral alignment or worn piston shoes; tee gauges into both loop lines to confirm before adjusting linkage.
Overhaul & rebuild points
At high hours the HST pump and motor are the major rebuild items on this loader — piston-shoe and swashplate wear shows up as soft power and slow cycle times before the unit fails outright. The injection pump on the S3D84E-3B is a rebuild candidate once fuel-contamination history is known, rather than a wear-out-by-hours item. The articulation center pin and steering-cylinder rod seals wear as a set: once the pin or rod surface grooves, a fresh seal alone won't hold, so plan to address the shaft and seal together at overhaul.
Seasonal & environment servicing
Cold starts hit this loader harder than a bigger machine: switch to the OMM's cold-weather engine-oil and hydraulic-oil viscosity grades, run winter-blend diesel below about -10°C, and keep the glow-plug relay, timer, and battery connections in top shape through the season. Give the machine a longer idle warm-up before working the loader hard, since cold hydraulic oil slows both steering and implement response on this shared-tank system. In dusty yard or nursery duty, shorten the air-filter and radiator-screen cleaning interval, since this small engine has little margin for airflow buildup.
WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) 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 → |
| 08036-01414 | Clip,(For Add.Filter)(Except Japan) | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Charge lamp (red, battery symbol) | Alternator not charging the battery | Slipping or broken fan/alternator belt, loose or corroded battery cable, failed alternator | Stop engine, check belt tension and condition, check battery terminals before restarting |
| Engine oil pressure lamp (red, oil-can symbol) | Engine oil pressure below safe level | Low oil level, clogged oil filter, worn oil pump or bearings | Stop engine immediately, check oil level and filter condition before restart |
| Coolant temperature gauge in red zone | Engine coolant overheating | Low coolant, clogged radiator fins, loose or worn fan belt, faulty thermostat | Idle engine to cool, shut down, check coolant level once cool and inspect radiator and belt |
| Air cleaner restriction indicator | Intake air filter element is clogged | Dust and debris buildup in air filter element | Clean or replace the air filter element and reset the indicator |
| Parking brake lamp | Parking brake is applied | Brake left engaged, or brake switch/linkage fault if lamp stays on with brake released | Release parking brake before operating; if lamp stays on, check the brake switch and linkage |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) attachments & work tools
Buckets
Standard general-purpose bucket is rated about 0.6 m³ (0.78 yd³) heaped, sized to the machine's roughly 1.65 m (5 ft 5 in) track width. Light-material and site buckets in the same width class are the common alternative profiles for this loader size.
Pallet forks
Pin-mount pallet forks scaled to the loader's narrow frame (about the same width as the general-purpose bucket) suit this compact class. Fork lift ratings should stay well under the machine's static tipping load of roughly 2,644 kg (5,830 lb), so tine capacity and spacing need to match light material-handling duty rather than full bucket-rated loads.
Mounting/coupler system
This loader is fitted with a two-pin (pin-on) bucket and work-tool mount, not a factory quick coupler. Aftermarket pin-on-to-skid-steer quick-attach face plates (roughly 2,500 kg / 5,500 lb rated) exist to let the machine run universal skid-steer-pattern attachments, but that is a bolt-on conversion kit, not a factory-fitted option.
Auxiliary hydraulics
A dedicated auxiliary/third-function hydraulic circuit for powered tools (brooms, augers) is not documented as standard equipment for this serial range. Treat any hydraulic-tool circuit on this machine as a dealer-installed or aftermarket addition and confirm available flow/pressure with your dealer before ordering a hydraulic-powered attachment.
Snow and site-maintenance tools
Snow blades, pusher boxes, and sweeper/broom attachments sized under roughly 2 m width fit this loader's frame and bucket-width envelope. These are generally sourced through aftermarket attachment lines rather than a factory catalog listing tied to this exact serial range.
Multi-purpose and grapple buckets
4-in-1 combination buckets and light grapple-bucket variants exist in this size class through aftermarket suppliers, but no factory grapple or multi-purpose bucket option is documented specifically for this serial range. Any clamp-style hydraulic function would depend on the auxiliary circuit noted above.
Cab and guarding options
The operator station is a ROPS-certified cab as standard equipment. FOPS-rated overhead guarding and cab screen/rock-guard kits are common protective options across this loader class for work near overhead hazards, though none are itemized specifically for this NA serial range.
All WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) assemblies by section
Every catalogued assembly group for the Komatsu WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory And Tool
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Accessory And Tool : Spare Parts (North America Spec.)(#21450-)
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 36***70 | Element,Hydraulic | 1 |
| YM***50 | Element,Fuel Filter | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Accessory And Tool : Tool
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***17 | Nozzle | 1 |
Cooling System
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Cooling System : Radiator And Oil Cooler (North America Spec.)(#21450-)
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 8 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Cooling System : Radiator Piping And Reserve Tank
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 07***19 | Clamp, Hose | 4 |
| 07***15 | Clip | 2 |
Electrical System
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Back-Up Alarm (North America Spec.)(#21450-)
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Battery
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***07 | Nut,Lock | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Electrical System (Front Line) (North America Spec.)(#21450-)
| 01***16 | Bolt, Mount Solenoid Valve | 8 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Electrical System (Main Line)(#20642-)
| 01***20 | Screw | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 11 |
| 01***12 | Bolt,(See Fig. K0210-16a0) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Electrical System (Rear Line)
| 01***35 | Screw, Mount Lens | 8 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Electrical System : Instrument Panel (North America Spec.)(#21450-)
| 01***08 | Screw | 2 |
| 01***14 | Screw,(With Joy Stick Steering) | 2 |
| 01***16 | Screw,(For Joy Stick Steering) | 2 |
Engine Related Parts
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Engine Related Parts : Air Cleaner Connection (North America Spec.)(#21450-)
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 07***89 | Clamp,(D31s) | 1 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 5 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Engine Related Parts : Damper
| 01***40 | Bolt,Reamer | 6 |
| 04***12 | Pin,Spring (See Fig.0201) | 6 |
| 20***10 | Rubber | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Engine Related Parts : Engine Mounting Parts
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Engine Related Parts : Engine Related Parts
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 07***23 | O-Ring,(F4350-61a1b-29 ) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Fuel Tank And Related Parts : Fuel Line(#21308-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Fuel Tank And Related Parts : Fuel Tank(#21308-)
| 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 : Wa50-3na(S/N 20001-Up (For North America)) : Guard : Counter Weight
| 01***90 | Bolt | 4 |
| 01***10 | Bolt - Relay And Flasher Mounting | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Guard : Engine Hood (Wiht Rops Canpy) (North America Spec.)(#21450-)
| 01***20 | Screw | 4 |
| 01***20 | Screw | 4 |
| 01***12 | Bolt,(With Speedometer) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Guard : Engine Hood Stay And Lock (North America Spec.)(#21450-)
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 01***20 | Bolt,See Fig. K4010-11a0 | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Guard : Noise Abatement Parts
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 36***51 | Sheet | 1 |
Hydraulic System
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Hydraulic System : Hydraulic Piping (Delivery Line)(#21212-)
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Hydraulic System : Hydraulic Piping (Lift And Dump Cylinder Line) (With Others Bucket? Fork And Front Attachment)
| 01***40 | Bolt,(Shim 3-Piece) | 2 |
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
| 07***18 | O-Ring, Divider Valve Mounting | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 |
Main/Revolving Frame And Related Parts
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Main/Revolving Frame And Related Parts : Front Frame (With Front Attachment)
| 01***55 | Bolt,(For Reinforced Type) | 1 |
| 01***85 | Bolt | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 8 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Main/Revolving Frame And Related Parts : Rear Frame (North America Spec.)(#21450-)
| 01***50 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***80 | Screw | 4 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Marks And Plates
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Marks And Plates : Marks And Plates (With Rops Canopy) (North America Spec.)(#21450-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
| 09***01 | Plate? Safety,Hot Oil Hazard? Hydraulic. Tank Cap | 1 |
Operator'S Compartment And Control System
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Accelerator Pedal And Linkage
| 01***16 | Bolt - Box Mounting | 3 |
| 01***25 | Screw | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Brake Pedal And Linkage (1/2)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 6 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
| 01***08 | Nut, Lock | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Brake Pedal And Linkage (2/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***65 | Bolt,(Except Japan) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Floor Frame (With Rops Canopy) (North America Spec.)(#21450-)
| 01***14 | Screw | 2 |
| 01***12 | Screw,(Wa320-1m?1p) | 6 |
| 01***16 | Screw,(For Joy Stick Steering) | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Operator'S Seat (North America Spec.)(#21450-)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 09***01 | Belt? Lap,(78mm Wide) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Parking Brake Lever And Linkage (1/2)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Parking Brake Lever And Linkage (2/2)
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 2 |
| 01***23 | Washer,(With Car Heater) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Rops Canopy (North America Spec.)(#21450-)
| 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Work Equipment Control Lever And Linkage (1/2) (With Front Attachment)
| 01***25 | Screw | 1 |
| 01***20 | Bolt,See Fig. K4010-11a0 | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Operator'S Compartment And Control System : Work Equipment Control Lever And Linkage (2/2) (With Front Attachment)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 3 |
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
S3d84e-3b Engine S/N 00101-Up
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Air Cleaner (Forwerded Individually Parts)
| YM***00 | Baffle | 1 |
| YM***10 | Element | 1 |
| YM***60 | Pan,Dust | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Air Intake Manifold
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Alternator (40a) (Inner Parts)(#00101-020304)
| YM***50 | Brush Ass'Y | 1 |
| YM***00 | Retainer,Bearing | 1 |
| YM***70 | Diode Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Alternator (40a) (Inner Parts)(#020305-)
| YM***20 | Rear Bracket Ass'Y | 1 |
| YM***30 | Front Bracket Ass'Y | 1 |
| YM***00 | Rotor Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Alternator And Mounting (40a)
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Camshaft And Tappet
| YM***80 | Camshaft Ass'Y | 1 |
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Crankshaft
| YM***00 | Gear,Crank | 1 |
| YM***80 | Parallel Pin | 1 |
| YM***10 | Spring Pin | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Cylinder Block
| YM***20 | Screw | 8 |
| YM***00 | Plug | 2 |
| YM***60 | Cylinder Block Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Cylinder Block Accsessory
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***00 | Gauge,Oil Level | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Cylinder Head
| YM***30 | Valve,Exhaust | 3 |
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***80 | Retainer, Spring | 6 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Cylinder Head Cover
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***70 | Splash-Guard | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Drive Gear
| YM***02 | Nut | 1 |
| YM***01 | Idler Gear Ass'Y,Idler | 1 |
| YM***00 | Gear,Injection Pump | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Drive Gear (Epa Spec.)(#24817-)
| YM***02 | Nut | 1 |
| YM***01 | Idler Gear Ass'Y,Idler | 1 |
| YM***52 | Screw | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Electrical Parts(#03081-)
| YM***20 | Timer,Solenoid | 1 |
| YM***10 | Relay,Stop Solenoid | 1 |
| YM***00 | Relay, Safety | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Exhaust Manifold
| YM***10 | Manifold,Exhaust | 1 |
| YM***02 | Stud | 2 |
| YM***02 | Screw | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Flywheel And Flywheel Housing
| YM***00 | Gear,Ring | 1 |
| YM***02 | Screw | 6 |
| YM***80 | Parallel Pin | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Front Cover
| YM***02 | Bolt Plated | 2 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***00 | Clip,Breather Hose | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Front Hanger
| YM***00 | Hook,Front | 1 |
| YM***42 | Screw | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Filter (Inner Parts)(#020305-)
| YM***10 | Cup, Strainer | 1 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***70 | Lever | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Filter (Inner Parts)(#03081-020304)
| YM***00 | O-Ring (Kit) | 1 |
| YM***70 | Lever | 1 |
| YM***80 | Cup, Strainer | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Filter And Piping(#03081-)
| YM***70 | Union | 1 |
| YM***51 | Check Valve Ass'Y,Joint | 1 |
| YM***90 | Spacer | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts) (Epa Spec.)(#24817-)
| YM***40 | Lever,Control | 1 |
| YM***30 | Spacer,Lever Shaft | 1 |
| YM***02 | Nut | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#03081-)
| YM***40 | Lever,Control | 1 |
| YM***30 | Spacer,Lever Shaft | 1 |
| YM***02 | Nut | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts) (Epa Spec.)(#24817-)
| YM***01 | Weight Assembly., Governor | 1 |
| YM***00 | Washer,Spring | 1 |
| YM***40 | Link? L=30.5,L=30.5 (Mark 05) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#03081-)
| YM***01 | Weight Assembly., Governor | 1 |
| YM***00 | Washer,Spring | 1 |
| YM***40 | Link? L=30.5,L=30.5 (Mark 05) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts) (Epa Spec.)(#24817-)
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
| YM***50 | Cover,Side | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#03081-)
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
| YM***50 | Cover,Side | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts) (Epa Spec.)(#24817-)
| YM***70 | Retainer, Spring | 3 |
| YM***02 | Screw | 2 |
| YM***00 | Valve,Delivery | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#03081-)
| YM***70 | Retainer, Spring | 3 |
| YM***02 | Screw | 2 |
| YM***00 | Valve,Delivery | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump And Piping (Epa Spec.)(#24817-)
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***22 | Pipe,Injection? No.2 | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Injection Pump And Piping(#03081-)
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***22 | Pipe,Injection? No.2 | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Fuel Nozzle And Spill Hose
| YM***20 | Spring | 1 |
| YM***00 | Fuel Nozzle Ass'Y | 3 |
| YM***00 | Fuel Injection Nozzle, Assembly | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Gasket Kit
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***20 | Gasket,Water Pump | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Lubricating Oil Cooler(#03081-)
| YM***00 | Clamp | 4 |
| YM***60 | Gasket | 1 |
| YM***40 | Pin,Spring | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Lubricating Oil Pump
| YM***00 | Oil Pump Ass'Y | 1 |
| YM***41 | Gasket (Kit) | 1 |
| YM***20 | Gasket,Lubricating Oil Pump | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Muffler And Mounting
| YM***02 | Screw | 4 |
| YM***10 | Cover | 1 |
| YM***31 | Muffler | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Oil Filter
| YM***50 | Nut | 1 |
| YM***00 | Valve | 1 |
| YM***02 | Plug | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Oil Pan
| YM***70 | Oil Pan Ass'Y | 1 |
| YM***40 | Plug | 1 |
| YM***02 | Screw | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Piston And Connecting Rod
| YM***00 | Screw | 2 |
| YM***00 | Crank Pin Metal A. (Std) | 1 |
| YM***00 | Piston Ass'Y | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Rear Hanger
| YM***00 | Hook,Front | 1 |
| YM***42 | Screw | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Rocker Arm
| YM***02 | Screw | 6 |
| YM***80 | Spring | 3 |
| YM***50 | Rocker Arm Ass'Y | 6 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Starting Motor (Inner Parts)(#00101-020304)
| YM***50 | Pinion Ass'Y,Pinion | 1 |
| YM***20 | Housing,Center | 1 |
| YM***40 | Field Coil Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Starting Motor (Inner Parts)(#020305-)
| YM***50 | Pinion Ass'Y,Pinion | 1 |
| YM***20 | Housing,Center | 1 |
| YM***90 | Spring,Brush | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Starting Motor And Mounting
| YM***52 | Bolt Plated | 2 |
| (Y***1) | Starting Motor Ass'Y,(See Fig.A6210-B0a1) | 1 |
| (Y***2) | Starting Motor Ass'Y,(See Fig.A6210-B0a1a) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Surge Tank
| YM***60 | Hose | 1 |
| YM***00 | Tank,Surge | 1 |
| YM***62 | Bolt,(For Shipping) | 11 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Turbocharger (Inner Parts)
| YM***20 | Shield,Heat | 1 |
| YM***80 | Housing Ass'Y,Blower | 1 |
| YM***25 | Housing Ass'Y,Turbine | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Turbocharger And Oil Piping
| YM***01 | Pipe,Outlet | 1 |
| YM***22 | Stud | 3 |
| YM***60 | O-Ring (Kit) | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Water Pump And Cooling Fan (Epa Spec.)(#24817-)
| YM***02 | Bolt Plated | 2 |
| YM***20 | Gasket,Water Pump | 1 |
| YM***02 | Screw | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Water Pump And Cooling Fan(#03081-)
| YM***02 | Bolt Plated | 2 |
| YM***20 | Gasket,Water Pump | 1 |
| YM***02 | Screw | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : S3d84e-3b Engine S/N 00101-Up : Water Separator (Inner Parts)(#03081-)
| YM***00 | Gasket | 2 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Plug,Air | 2 |
Service Kit And Component Parts
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : 3-Spool C0ntrol Valve (1/2)(#20094-)
| 36***70 | Plate | 2 |
| 36***20 | Spool Section Ass'Y | 1 |
| 36***20 | Spool Section Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : 3-Spool Control Valve (2/2)
| 07***18 | O-Ring, Divider Valve Mounting | 2 |
| 36***70 | Plate | 1 |
| 36***50 | Spool Section Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Gear Pump Inner Parts)(#21212-)
| 02***53 | O-Ring | 1 |
| UC***21 | Gear | 1 |
| UC***-0 | Pump Ass'Y,Gear | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Inner Parts)(#21212-)
| 01***25 | Screw | 2 |
| 36***02 | Pump Ass'Y,(A4vg28da-931-0) | 1 |
| UC***96 | Orifice | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Control And Cut-Off Valve)(#20642-)
| 02***15 | O-Ring | 2 |
| UC***07 | Bolt | 4 |
| UC***66 | Cover Ass'Y | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Cover And Relief Valve)(#20642-)
| 01***60 | Bolt | 4 |
| 02***09 | O-Ring | 2 |
| 02***88 | O-Ring | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Leaning Cylinder)(#20642-)
| 01***20 | Bolt (Itl) | 8 |
| 02***09 | O-Ring | 1 |
| 02***51 | O-Ring (Kit) | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts) (Rotary Group)(#21212-)
| 04***12 | Ring, Snap (4) | 1 |
| 04***25 | Ring,(W/Emergency Steering) (1m?1d) | 1 |
| UC***98 | Plate,Control | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Main Pump (Piston Pump Inner Parts)(#20642-)
| 01***12 | Bolt | 11 |
| 02***09 | O-Ring | 2 |
| 41***80 | O-Ring | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Priority Valve
| 36***00 | Valve Ass'Y,Priority | 1 |
| 42***70 | Ball | 1 |
| 42***80 | Guide | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Service Kit
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***75 | O-Ring,Steering Oil Filter | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Steering Cylinder (Inner Parts)
| 01***19 | Nut | 1 |
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Travel Motor (Inner Parts) (Control Group)(#20642-)
| 01***35 | Bolt,Snap | 8 |
| 01***45 | Bolt | 4 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Service Kit And Component Parts : Travel Motor (Inner Parts)(#20642-)
| 04***30 | Ring, Snap, Snap-Ring | 1 |
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 36***01 | Motor Ass'Y,(A6v59da-974-1) | 1 |
Suspension And Wheel Related Parts
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Suspension And Wheel Related Parts : Wheel And Tubeless Tire
| 09***20 | Cap, Tire Valve | 4 |
| 36***50 | Valve Ass'Y,(Service Only) Z0600 | 4 |
| 36***10 | Tire,(Tubeless) | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Suspension And Wheel Related Parts : Wheel And Tubeless Tire (Toyo) (North America Spec.)
| 09***20 | Cap, Tire Valve | 2 |
| 36***50 | Valve Ass'Y,(Service Only) Z0600 | 2 |
| 36***10 | Tire,(Tubeless) | 2 |
Torque Converter And Transmission
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Front Axle (Defferential) (North America Spec.)(#21450-)
| 01***70 | Bolt, Spacer | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 7 |
| 01***20 | Screw | 14 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Front Axle (Final Drive? L.H.) (North America Spec.)(#21450-)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Front Axle (Final Drive? R.H.) (North America Spec.)(#21450-)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Hst Piping (Hst Control Line)(#20642-)
| 01***35 | Bolt | 2 |
| 01***40 | Bolt,Reamer | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Hst Piping (Main Line)(#20642-)
| 01***32 | Washer, (Without Emergency Steering) | 24 |
| 02***32 | Bolt,(With Joy Stick Steering) | 4 |
| 02***38 | Bolt,Radio Controlled Slag Handling | 16 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Hst Piping (Oil Cooler Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 04***10 | Clip | 6 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Hst Piping (Pump And Motor Drain Line)(#20642-)
| 04***10 | Ring, Retaining | 1 |
| 07***23 | O-Ring,(F4350-66a1 -1c ) | 1 |
| 07***07 | Plug,Housing No.2?3?4?5?6 | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Hst Piping (Suction And Charge Line)(#21212-)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***00 | Bolt,(For Front Brake Release) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Rear Axle (Defferential) (North America Spec.)(#21450-)
| 01***70 | Bolt, Spacer | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 7 |
| 01***20 | Screw | 14 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Rear Axle (Final Drive? L.H.) (North America Spec.)(#21450-)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Rear Axle (Final Drive? R.H.) (North America Spec.)(#21450-)
| 01***65 | Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***12 | Pin, Spring | 3 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Transfer (1/2)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***16 | Bolt | 1 |
| 04***20 | Pin,Dowel (Welded) | 2 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Transfer (2/2)
| 01***75 | Bolt,(For 75a Alternator) | 1 |
| 01***12 | Bolt - M8 - 1.25 X 12 | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Torque Converter And Transmission : Transfer Mounting Parts
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 1 |
| 01***05 | Capscrew | 5 |
| 01***10 | Nut,(Without Air Conditioner) | 2 |
Work Equipment
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : 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 : Wa50-3na(S/N 20001-Up (For North America)) : Work Equipment : Bucket? 0.6m3
| 36***20 | Edge (Welded) | 1 |
| 36***30 | Edge (Welded) | 1 |
| 42***10 | Bucket | 1 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Work Equipment : Cutting Edge
| 01***45 | Washer,(For Travel Motor) (Not Show) | 7 |
| 02***50 | Bolt | 7 |
| 02***15 | Nut (Op) | 7 |
Komatsu : Wa50-3na(S/N 20001-Up (For North America)) : Work Equipment : Lift Arm And Bellcrank (With Front Attachment)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 7 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 11 |
Frequently asked questions
What engine powers the Komatsu WA50-3NA (S/N 20001-up, North America)?
It runs a Komatsu S3D84E-3B, a 3-cylinder turbocharged diesel displacing 1.5 L (1,491 cc), rated at 27.6 kW (37 hp) at 2,500 rpm. The engine is mechanically governed with no ECM or electronic fault codes, so diagnostics on this loader come from gauges and pilot lamps rather than a scan tool.
What does the WA50-3NA weigh in operating trim?
Operating weight for this North America configuration is about 3,720 kg (8,200 lb), putting it in the compact 3.5-4 tonne wheel-loader class built for yard, nursery, and tight-site work rather than heavy production loading.
What replaced the WA50-3 in Komatsu's compact wheel loader line?
Komatsu's next compact-class wheel loader for North America was the WA50-6, a similarly sized, similarly powered loader that followed the WA50-3 generation. No WA50-4 or WA50-5 was marketed in North America in this size class; the line moved from the Dash-3 generation to the Dash-6.
What WA50-3NA(S/N 20001-UP (FOR NORTH AMERICA)) owners discuss
What's the drivetrain like on the WA50-3NA, and what do owners say about how it behaves?
This size class of WA50-3 runs a hydrostatic drive rather than the torque-converter powershift found on the larger WA-series loaders. Hydrostatic drive gives smooth, stepless speed control and good low-speed creep for loading pallets or tight yard work, but how it feels depends entirely on charge-pump condition and clean oil. Compact hydrostatic loaders in this class commonly show a gradual loss of travel power as the machine warms up when there's an internal leak developing in the drive pump or motor, rather than a simple low-oil or clogged-filter problem, oil thins as it heats and a marginal internal leak gets worse through the shift. Because loss of hydrostatic drive on a grade also means loss of dynamic braking, have your dealer verify charge pressure and relief settings before returning the machine to work.
What engine is actually in this machine, and are there any starting quirks to know about?
The WA50-3NA is built around a small 3-cylinder turbocharged diesel from Komatsu's 82E-98E engine family (S3D84E generation). It's the same basic block Komatsu used across its small-loader lineup of that era, sibling WA30-5 and WA40-3 loaders share overhaul components with it, and the same family also powered period mini excavators. Mechanically it's simple compared to later common-rail engines, no aftertreatment to manage, but cold starting leans heavily on glow plug condition and battery state. A hard cold start or no-start on this engine family is more often traced to a weak battery, a corroded ground, or a failed glow plug than to the injection pump or injectors, so checking electrical supply first is the standard move before chasing a fuel-system fault.
How does the loader hydraulics hold up, and what causes slow or spongy bucket response?
Bucket and boom hydraulics on this size of machine run off a modest-displacement pump feeding a comparatively small reservoir, so oil condition matters more here than on a big loader, there's less fluid volume to dilute contamination. A slow bucket raise, soft-feeling tilt, or hydraulic noise on a warmed-up machine is more commonly traced to dirty or degraded oil than to a worn pump. Machines kept on a regular filter and fluid change schedule tend to keep a responsive lift and tilt circuit well past mid-life, while a raise time that's visibly slower than when the machine was fresh is usually the first sign the filter or oil needs attention rather than a hydraulic component failing.
Where does wear actually show up first on a machine like this, and what maintenance gets skipped?
As an articulated wheel loader, the WA50-3NA doesn't scrub its tires the way a skid steer does while turning, so tread life tends to run better than on a skid steer doing comparable work. The tradeoff is the center articulation joint: it's a high-load, constantly moving pivot that's easy to miss when greasing because it sits tucked behind the frame. On compact articulated loaders generally, the articulation and boom pivot pins are the wear points that get neglected first, and dirt left on a grease fitting gets pushed into the pin bore on the next greasing and acts like grinding paste between pin and bushing. Wiping fittings clean before greasing is treated as mandatory on this class of machine, not optional. Because a worn articulation joint also affects steering control, have your dealer verify pin and bushing play if you feel looseness in the steering.
What electrical or sensor complaints come up most on this class of Komatsu loader?
Most "electrical gremlin" complaints on loaders this size and era, screen resets, false warning lights, intermittent no-crank, trace back to a weak battery, corroded connectors, or a tired alternator rather than a failed gauge cluster or control module. Before condemning a sensor or dash unit, the standard troubleshooting order is to check battery state of charge and clean and tighten ground and harness connections first, that resolves the bulk of nuisance faults reported on small Komatsu diesel equipment of this vintage.
What should I check before buying a used WA50-3NA (S/N 20001-UP, North America)?
This is a fairly uncommon size class in North America, effectively Komatsu's smallest wheel loader offering from that generation, and Komatsu built the WA50-3 across different serial and engine blocks for different markets. Start by confirming the serial plate actually falls in the North America 20001-UP range so you know which engine and configuration you're buying, don't assume it matches specs quoted for other WA50-3 serial ranges you find online. On the walk-around: run the hydrostatic drive in both forward and reverse and confirm it doesn't lose power as it warms up, check the articulation and boom pivots for play (worn pins and bushings show up on high-hour machines), verify glow plug and cold-start function, and look for oil weeping around the drive pump and motor housings. Given the model's age, confirm parts and service support with your dealer, sibling small-loader parts overlap with this engine family but not every component crosses directly.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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