Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA65-3(S/N HA940051-HA940548)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA65-3 (S/N HA940051-HA940548) is a compact-class wheel loader featuring a 4-cylinder 4D 94E engine producing 50 hp (37.3 kW). This machine operates with a hydrostatic transmission and an operating weight of approximately 9,392 lb (4,260 kg). It is configured with a bucket capacity ranging from 0.55 m³ to 1.1 m³ and utilizes 405/70 R18 SPT 9 tires.
This generation represents a specific production era for the WA65 series, characterized by its hydrostatic drive system and high-penetration power. In today's used market, this machine remains significant due to its specialized utility in small-scale earthmoving and its compatibility with Komatsu's established maintenance ecosystem, including KOWA fluid analysis and KOMTRAX telematics integration.
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 WA65-3(S/N HA940051-HA940548) specifications
Engine
| Model | 4D 94E |
| Net Power | 50 hp (37.3 kW) |
| Displacement | 169.4 cu in (2,776 cc) |
| Cylinders | 4 |
| Max Torque | 121.7 lb ft (165.0 N-m) @ 1600 rpm |
Weights
| Operating Weight | 9,390 lb - 9,392 lb (4,259.2 kg - 4,260 kg) |
| Static Tipping Weight | 7,716 lb - 7,716.2 lb (3,500 kg - 3,501.7 kg) |
Dimensions
| Length with Bucket on Ground | 16.79 ft (5.12 m) |
| Height to Top of Cab | 9.57 ft - 10 ft (3 m) |
| Width (Transport) | 1.85 m |
| Wheelbase | 6.4 ft (2 m) or 72 in (182.9 cm) |
| Ground Clearance | 1.3 ft (0.4 m) or 12 in (30.5 cm) |
| Bucket Width | 6.07 ft (182.9 cm) or 6.6 ft (2 m) |
| Hinge Pin Max Height | 10.22 ft (3.048 m) or 10 ft (3 m) |
| Reach at Max Lift and Dump | 2.56 ft (78 cm) or 3.3 ft (1 m) |
| Dump Clearance at Max Raise | 8.26 ft (2.438 m) or 9.8 ft (3 m) |
Performance
| Max Speed - Forward | 12.5 mph (20.1 km/h) or 13 mph (20 kph) |
| Bucket Capacity - Heaped | 0.9 - 1.1 m³ (0.9 - 0.92 yd³) |
| Breakout Force | 8,947.4 lb - 8,950 lb (4,058 kg - 4,059.6 kg) |
| Pump Flow Capacity | 14.6 gpm (55.3 lpm) or 15 gpm (55 lpm) |
| Turning Radius | 12.2 ft (3.658 m) or 13 ft (4 m) |
| Raise Time | 5 sec |
| Dump Time | 1 sec |
| Lower Time | 2.4 sec |
| Rear Axle Oscillation | 24 degrees |
Service capacities (summary)
| Fuel Capacity | 20 - 20.4 gal (77 - 77.2 l) |
| Hydraulic System Fluid Capacity | 18.5 - 19 gal (70 l) |
| Engine Oil Fluid Capacity | 2.5 - 3 gal (9 - 9.5 l) |
| Cooling System Fluid Capacity | 2.7 - 3 gal (10 - 10.2 l) |
| Front Axle/Diff Fluid Capacity | 1.7 - 2 gal (6.4 - 6 l) |
| Rear Axle/Diff Fluid Capacity | 1.8 - 2 gal (6.8 - 7 l) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA65-3(S/N HA940051-HA940548) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase | 9.5 L (2.5 gal) | Komatsu Diesel Engine Oil (SAE 5W-30 or SAE 10W/30 per climate/spec requirements) |
| Cooling system | 10.2 L (2.7 gal) | Komatsu Super Coolant AF-NAC |
| Fuel tank | 77.2 L (20.4 gal) | |
| Transmission/powertrain compartments | Not specified | Komatsu Powertrain Oil (TO10 or TO30) |
| Front axle/differential | 6.4 L (1.7 gal) | Komatsu Axle Oil (AXO 80W) |
| Rear axle/differential | 6.8 L (1.8 gal) | Komatsu Axle Oil (AXO 80W) |
| Hydraulic system and tank | 70.0 L (18.5 gal) | Komatsu Hydraulic Oil (ISO VG46) |
| Grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WA65-3(S/N HA940051-HA940548) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the WA65-3(S/N HA940051-HA940548) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize the KOWA (Komatsu Oil Wear Analysis) program to monitor engine oil for wear metals like iron or copper and check hydraulic fluid for particle count and oxidation. Regularly sampling fluids at 500-hour intervals allows for detecting silicon contamination from dirt or sodium from coolant leaks before component failure occurs.
Corrective & Common Repairs
Monitor the hydrostatic transmission and hydraulic system for pressure drops; relief valve settings should be maintained near 2900.8 psi (200 bar). Frequent inspections of hydraulic hoses are necessary to identify cracks or leaks. Ensure all articulation and steering pins are greased to prevent excessive play in the chassis.
Overhaul & Rebuild Points
Major service milestones include a 2,000-hour hydraulic oil change and transmission service. During high-hour rebuilds, focus on inspecting the turbocharger, checking valve adjustments, and evaluating the pump system. Comprehensive structural inspections of boom and bucket welds are required to ensure chassis integrity during heavy loading cycles.
Seasonal & Environment Servicing
In dusty environments, frequently inspect the air filter restriction indicator and clean the radiator/oil cooler fins to prevent overheating. During cold operations, verify engine coolant SCA levels and ensure the 12V electrical system and battery terminals are free of corrosion. Check tire inflation regularly to maintain optimal ground pressure.
WA65-3(S/N HA940051-HA940548) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129470-55610 | Body, Fuel Filter | Fuel system service | Check fitment → |
| YM120324-55760 | Element, Fuel Oil | Fuel system service | Check fitment → |
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 42U-01-13110 | Air Filter | Air intake service | Check fitment → |
| 42U-01-H0P01 | Filter Element | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WA65-3(S/N HA940051-HA940548) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure or engine control drive system circuit malfunction (engine stall) | ECM power connections, fuses, or ground wire issues | Inspect ECM power connections, fuses, or ground wires |
| E11 | Engine control system failure; output power reduced to protect engine | High coolant temperature, low oil pressure, or clogged air filter | Check coolant temperature, oil pressure, and air filter |
| CA115 | Engine crankshaft speed sensor failure or engine/backup speed sensor error | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA122 | Intake air pressure sensor feedback voltage is too high | Sensor malfunction or wiring fault | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure sensor feedback voltage is too low | Sensor short circuit or airflow restriction | Check for a sensor short or an airflow restriction |
| CA153 | Intake air temperature sensor feedback voltage is too high | Sensor error or electrical fault | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor feedback voltage is too low | Sensor error or electrical fault | Replace or test the IAT sensor |
| CA234 | Engine overspeed | Throttle calibration issues, engine load cycle, or operator misuse | Verify throttle calibration and engine load cycle |
| CA441 / CA442 | Battery voltage too low or too high | Alternator failure, battery failure, or voltage regulator issues | Replace the alternator or battery; check the voltage regulator |
| AA10NX | Air cleaner clogging | Accumulated debris in air filter | Replace the air filter |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA65-3(S/N HA940051-HA940548) attachments & work tools
Buckets
Heaped capacity ranges from 0.55 m³ (0.7 yd³) to 1.1 m³ (1.4 yd³). Standard configurations include a shovel with teeth and ROPS cabin options.
Forks
Compatible forks are available for this model series.
Mounting & Hydraulics
The machine features a parallel linkage boom design for improved visibility. Quick hitch hydraulic and mechanical options are documented for this class.
Factory Configurations & Guarding
Standard models include a ROPS cabin. Optional air conditioning is available to maintain optimal cab climate.
All WA65-3(S/N HA940051-HA940548) assemblies by section
Every catalogued assembly group for the Komatsu WA65-3(S/N HA940051-HA940548). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
01 Engine, Engine Mounting
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 00 Maintenance Kit
| 42***01 | Filter Element | 1 |
| 42***02 | Filter Element | 1 |
| 42***50 | Filter Element | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 01 Engine, Engine Mounting
| 01***00 | Capscrew | 4 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 16 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 02 Cylinder Block And Attaching Parts
| YM***00 | Screw | 18 |
| YM***31 | Gasket (Kit) | 1 |
| YM***00 | Main Metal Ass'Y (Std) | 5 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 04 Crank Assembly
| YM***80 | Flywheel, Assembly | 1 |
| YM***00 | Connecting Rod, Assembly | 4 |
| YM***01 | Pin, Piston | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 05 Cylinder Head And Attaching Parts
| YM***80 | Retainer, Spring | 8 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 4 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 06 Gasket Kit, Cylinder Head
| YM***40 | Seal,Valve? Exhaust (Kit) | 4 |
| YM***01 | Gasket (Kit) | 1 |
| YM***02 | Seal,Ring (Kit) | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 08 Timing Gear Case And Flywheel Housing
| YM***52 | Screw | 9 |
| YM***02 | Bolt Plated | 3 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 09 Engine Timing Gear
| YM***00 | Idle Gear Ass'Y | 1 |
| YM***00 | Tappet Rod | 8 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 10 Engine Lubrication
| 42***70 | Hose Assembly | 1 |
| 42***10 | Drain Valve | 1 |
| 42***60 | Hose | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 15 Water Pump
| 42***00 | Fan | 1 |
| 42***30 | Adaptor | 1 |
| 78***20 | Sensor, Trans. Control Valve Oil Temperature | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 20 Injection System
| YM***02 | Bolt Plated | 1 |
| YM***40 | Injection Pipe N. 4 | 1 |
| YM***20 | Spring | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 24 Injection Pump, Body Pump
| YM***00 | Segment | 4 |
| YM***00 | Gasket Disc | 4 |
| YM***20 | Valve,Delivery | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 25 Injection Pump
| YM***00 | Gasket | 1 |
| YM***40 | Screw | 2 |
| YM***00 | Gasket | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 26 Fuel Pump
| YM***40 | Gasket | 4 |
| YM***60 | O-Ring | 2 |
| YM***10 | Feed Pump Ass'Y | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 28 Fuel System, Pre Filter
| 01***16 | Screw | 6 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 01***04 | Nut,(For Air Conditioner Less) | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 29 Fuel System, Fine Filter
| YM***02 | Screw | 1 |
| YM***10 | Banjo Fitting | 1 |
| YM***10 | Protector | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 46 Air Intake System, Standard
| YM***00 | Manifold,Air Intake | 1 |
| YM***21 | Gasket (Kit) | 1 |
| YM***52 | Screw | 9 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 49 Air Filter System, Standard
| 01***35 | Bolt,(For Fix Position) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 07***09 | Clamp, Hose - At Water Pump | 3 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 54 Air Cleaner
| 42***10 | Air Filter | 1 |
| 42***01 | Filter Element | 1 |
| 42***02 | Filter Element | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 57 Exhaust System
| YM***02 | Nut | 2 |
| YM***01 | Gasket (Kit) | 1 |
| YM***52 | Screw | 6 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 01 Engine, Engine Mounting : 60 Engine Control
| 01***16 | Bolt - Box Mounting | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
02 Cooling System
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 02 Cooling System : 73 Radiator
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 02 Cooling System : 74 Radiator Attaching Parts
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 8 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
| 01***25 | Bolt - Relay Mounting | 2 |
03 Electric System
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 42 Alternator
| YM***41 | Cover, Rear | 1 |
| YM***20 | Timer,Solenoid | 1 |
| YM***50 | Cable | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 43 Starter Motor
| YM***80 | Holder Brush, Assembly | 1 |
| YM***10 | Retainer | 1 |
| YM***20 | Shift Lever Ass'Y | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 56 Electric System, Lighting Unit
| 01***50 | Capscrew | 4 |
| 01***16 | Screw, Mount Parking Lights | 4 |
| 42***70 | Nut | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 61 Electric System, Kabelbaum
| 01***16 | Screw | 2 |
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 15 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 62 Electric System, Relay
| 01***10 | Screw,(For Lighter) | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 2 |
| 01***12 | Screw,(With Articulate Indicator) | 3 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 63 Instrument Box And Attaching Parts
| 41***60 | Orifice Plate | 1 |
| 42***01 | Key Kit | 1 |
| 42***10 | Starter Switch | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 64 Instrument Box And Attaching Parts
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 42***90 | Protective Strip | 3 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 65 Windshield-Wiper - Washer System
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 41***60 | Nut | 3 |
| 42***60 | Connection | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 68 Radio
| 01***12 | Screw,(Without Ashtray) | 2 |
| 42***00 | Sleeve | 1 |
| 42***50 | Antenna | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 70 Turning Light
| 01***25 | Bolt, Pinlock | 1 |
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***26 | Washer,Spring | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 71 Back Up Alarm
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***12 | Washer,(With Body Positioner) | 4 |
| 42***20 | Relay | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 74 Battery
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***12 | Washer,(With Body Positioner) | 2 |
| 42***00 | Battery | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 03 Electric System : 75 Battery Main Switch
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
04 Transmission, Universal Joint
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 04 Transmission, Universal Joint : 61 Axial Piston Pump
| 42***20 | Screw | 1 |
| 42***00 | Axial Piston Pump | 1 |
| 42***00 | Pump | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 04 Transmission, Universal Joint : 75 Universal Joint
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 42***00 | Universal Joint | 1 |
| 42***01 | Lubrication Nipple | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 04 Transmission, Universal Joint : 83 Clutch
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***25 | Bolt,Sight | 12 |
| 42***10 | Flange | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 04 Transmission, Universal Joint : 97 Hydraulic Pump Drive
| 01***50 | Screw | 2 |
| 01***20 | Screw | 4 |
| 01***40 | Screw | 16 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 04 Transmission, Universal Joint : 98 Axial Piston Engine
| 42***00 | Axial Piston Engine | 1 |
| 42***57 | Variator | 1 |
| 42***58 | Plug | 2 |
05 Rear Axle
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 05 Rear Axle : 43 Rear Axle
| 01***16 | Nut - M20 | 8 |
| 42***00 | Rear Axle | 1 |
| 42***30 | Disc | 8 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 05 Rear Axle : 44 Axle Insert
| 42***03 | Shim | 2 |
| 42***04 | Shim | 2 |
| 42***05 | Shim | 2 |
06 Disc Wheel, Chain
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 06 Disc Wheel, Chain : 77 Disc Wheel
07 Steering
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 07 Steering : 01 Steering Column
| 42***80 | Steering Column | 1 |
| 42***01 | Nut | 1 |
| 42***02 | Rubber Washer | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 07 Steering : 05 Steering, Pipings
| 01***25 | Bolt,Sight | 4 |
| 01***60 | Bolt, Mounting | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 07 Steering : 07 Steering Cylinder
| 42***50 | Seal | 1 |
| 42***60 | Ball And Socket Join | 2 |
| 42***70 | Snap Ring | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 07 Steering : 07 Steering Cylinder, Gasket Kit
| 42***50 | Seal | 1 |
| 42***03 | Stripper | 1 |
| 42***04 | Seal | 1 |
08 Front Axle
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 08 Front Axle : 00 Front Axle
| 01***95 | Screw | 8 |
| 01***13 | Nut,(For Adjustable Rod) | 8 |
| 01***16 | Nut - M20 | 8 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 08 Front Axle : 01 Axle Insert
| 42***00 | Shim | 1 |
| 42***01 | Shim | 2 |
| 42***02 | Shim | 1 |
10 Frame
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 10 Frame : 02 Frame
| 01***12 | Bolt,(With Speedometer) | 8 |
| 01***16 | Bolt, Mount Solenoid Valve | 6 |
| 42***90 | Seal | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 10 Frame : 03 Hinge
| 01***25 | Screw | 8 |
| 01***30 | Screw | 4 |
| 01***40 | Screw | 6 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 10 Frame : 06 Fender
| 01***12 | Washer,(With Body Positioner) | 4 |
| 42***90 | Nut | 8 |
| 42***00 | Nut | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 10 Frame : 09 Radiator Guard And Bonnet
| 01***12 | Bolt - Front Cover Mounting | 6 |
| 01***30 | Bolt,Stopper | 4 |
| 01***35 | Screw | 6 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 10 Frame : 12 Counterweight
| 01***60 | Flat Washer - M20 (Hardened) | 4 |
| 42***10 | Ring | 2 |
| 42***80 | Pin,Spring | 1 |
11 Drivers Cab
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 00 Safety Cabin
| 01***20 | Bolt,(Without Air Con. Or Heater) | 3 |
| 01***25 | Capscrew | 6 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 04 R.O.P.S. Canopy
| 01***20 | Bolt,(Without Air Con. Or Heater) | 3 |
| 01***08 | Washer,(For Mounting First Aid Kit) | 3 |
| 20***40 | Bulb | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 11 Soundproofing Of Cabin
| 42***80 | Screw | 10 |
| 42***00 | Cladding | 1 |
| 42***20 | Cover | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 12 Soundproof
| 42***50 | Roof Covering | 1 |
| 42***50 | Insulating Mat | 1 |
| 42***70 | Insulating Mat | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 13 Soundproof, Engine-Cladding
| 42***80 | Insulating Mat | 1 |
| 42***90 | Insulating Mat | 1 |
| 42***40 | Bracket | 16 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 18 Heater
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***20 | Bolt,See Fig. K4010-11a0 | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 7 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 11 Drivers Cab : 27 Drivers Seat, Attaching Parts
| 01***25 | Screw | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
| 01***12 | Washer,(With Body Positioner) | 4 |
12 Tools, Accessory, Lettering
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 00 Wedge And Attachement
| 01***20 | Bolt,See Fig. K4010-65a0 | 4 |
| 42***30 | Underl Wedge | 1 |
| 42***40 | Bracket | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 01 Tools And Accessory
| 01***40 | Screw | 4 |
| 01***40 | Nut,(Noise Suppression Spec.) | 1 |
| 04***55 | Pin, Cotter | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 02 Tools
| 42***30 | Tool Bag | 1 |
| 42***10 | Tool Set | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 03 Lettering
| 09***60 | Decal, Komatsu (Black Lettering) (Behind Driver'S Door) | 2 |
| 41***40 | Note Plate | 3 |
| 42***20 | Characters | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 04 Decals, German
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 05 Decals, English
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 06 Decals, French
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 08 Decals, Italian
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 09 Decals, Spanish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 10 Decals, Swedish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 11 Decals, Danish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 12 Decals, Finnish
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 13 Decals, Norwegian
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 14 Decals, Dutch
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 15 Decals, Portuguese
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 12 Tools, Accessory, Lettering : 16 Decals, Greek
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 1 |
| 42***50 | Plate? Operating | 1 |
| 42***80 | Plate? Caution,Hot Water | 1 |
13 Hydraulic System
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 01 Hydraulic System
| 01***65 | Capscrew | 4 |
| 01***25 | Bolt,Sight | 2 |
| 01***30 | Screw | 8 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 07 Check Port
| 42***60 | Brace | 4 |
| 42***90 | Plug | 2 |
| 42***30 | Teepiece | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 08 Pipings For Remote Control Valve : Unit_01_of_02
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 01***25 | Bolt - Relay Mounting | 4 |
| 42***30 | Elbow | 3 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 08 Pipings For Remote Control Valve : Unit_02_of_02
| 01***16 | Bolt, Mounting Transmission Control Switch | 4 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 2 |
| 41***80 | Lock Washer | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 09 Remote Control Valve : Unit_02_of_02
| 42***10 | Connection Socket | 1 |
| 42***00 | Connection Socket | 1 |
| 42***11 | Remote Control Valve | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 09 Remote Control Valve : Unit_01_of_02
| 42***10 | Remote Control Valve | 1 |
| 42***05 | Operating Assembly | 1 |
| 42***06 | Bell | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 12 Control Valve
| 42***00 | Actuater | 1 |
| 42***00 | Inlet Ass'Y | 1 |
| 42***01 | Timing Gear Case | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 26 Lift Cylinder
| 42***10 | Lift Cylinder | 1 |
| 42***19 | Stripper | 1 |
| 42***20 | Seal | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 28 Bucket Cylinder
| 42***10 | Bucket Cylinder | 1 |
| 42***02 | Stripper | 1 |
| 42***03 | Seal | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 13 Hydraulic System : 31 Hose Rupture Safety Device
| 01***50 | Capscrew | 4 |
| 01***50 | Screw | 4 |
| 42***60 | Brace | 18 |
14 Boom, Thrust Frame - Arm
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 14 Boom, Thrust Frame - Arm : 00 Boom
| 01***30 | Bolt - Pin Mounting | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
15 Equipment
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 00 Bucket
| 42***41 | Bucket | 1 |
| 42***60 | Reinforcement | 2 |
| 42***70 | Blade | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 02 Quick Change
| 01***85 | Bolt,(For Perforated Mask) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 03 Quick Change, Pipings
| 01***40 | Bolt - M6 X 40lg | 2 |
| 01***70 | Screw | 6 |
| 01***25 | Bolt - Relay Mounting | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 04 Fork Lift
| 42***30 | Fork | 2 |
| 42***00 | Locator | 2 |
| 42***80 | Carrier | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 05 Grab Bucket
| 01***13 | Nut,(For Adjustable Rod) | 8 |
| 42***20 | Grab Bucket | 1 |
| 42***01 | Backplate | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 06 Grab Bucket, Pipings
| 42***06 | Hose Assembly | 2 |
| 42***07 | Hose Assembly | 2 |
| 42***08 | Hydraulic. Cylinder | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 07 Side Tip Bucket
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(For Rubber Shoe) | 1 |
| 01***26 | Washer,Spring | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 10 Ripper Tooth Wear Plate And Marker Light
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***35 | Screw | 2 |
| 01***50 | Wing Nut | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 13 Compost Buckt
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***25 | Bolt, Pinlock | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 20 High Tip Bucket
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 49 Crane Boom
| 42***00 | Screw | 2 |
| 42***12 | Boom | 1 |
| 42***13 | Suspension Unit | 1 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 62 A.L.S. Equipment
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***50 | Screw | 2 |
| 01***40 | Screw | 4 |
Komatsu : Wa65-3(S/N Ha940051-Ha940548) : 15 Equipment : 65 A.L.S. Solenoid Valve
| 42***60 | O-Ring | 1 |
| 42***89 | Electrical Plug | 1 |
| 42***60 | Valve | 1 |
WA65-3(S/N HA940051-HA940548) serial number reference
The PIN plate is located on the front frame, on the right-hand side of the articulation joint. To read the prefix, identify the first two characters of the serial number sequence (HA). Verify the full serial number against the machine plate to distinguish between the standard HA940051-HA940548 range and the 30km/h option HA940549 and up.
| Prefix | Identifies | Notes |
|---|---|---|
| HA | WA65-3 (S/N HA940051-HA940548) | Standard configuration. Serial range HA940051-HA940548 is distinct from the 30km/h option (HA940549 and up). Engine is a 4-cylinder Komatsu unit (4D94E series). |
Frequently asked questions
What engine is installed in this specific WA65-3 serial range?
This machine is equipped with a 4-cylinder Komatsu 4D 94E engine, providing 50 hp (37.3 kW) of net power.
What is the operating weight of the WA65-3?
The operating weight for this model is approximately 9,391.7 lb (4,260 kg).
What machine replaced the WA65-3?
The WA65-6 is a later generation compact loader in the Komatsu lineup, featuring improved features and 55 hp (41 kW) power.
What WA65-3(S/N HA940051-HA940548) owners discuss
What are the common hydraulic performance symptoms to look for in this machine?
If all hydraulic functions become slow simultaneously, check the hydraulic oil level, filters, engine RPM under load, and oil temperature. If only one specific function is slow, investigate circuit-specific issues such as cylinder leakage, control-valve spool operation, or hose restrictions. Note that if hydraulics work well when cold but lose strength once hot, this often indicates internal leakage due to decreased oil viscosity; check the pump, main control valve, or cylinders for wear. Have your dealer verify pressure and flow levels during both cold and hot states.
What engine-related power loss issues should be investigated?
If the engine loses power specifically under digging loads, check for restrictions in the air filters, fuel filters, or intake/charge-air hoses. If the engine RPM drops heavily whenever hydraulics are engaged, the hydraulic system may be placing excessive load on the engine. Conversely, if engine speed remains normal but movements become weak, focus on the hydraulic system. For starting issues, verify battery state of charge, terminals, and grounds, as voltage can collapse under starter load even if the display appears functional.
What are the typical maintenance requirements for the cooling and engine systems?
The cooling system requires monitoring of the radiator, hydraulic oil cooler, and charge-air cooler, as debris buildup between stacked coolers can cause overheating. The 4D 94E engine (which may also be identified as a Yanmar 4TNE94 in certain configurations) requires regular checks of the coolant level and fan operation. For air conditioning maintenance, if the compressor or dryer is replaced, ensure the new compressor is filled with 180 cm³ PAG oil and nitrogen gas (N2). Have your dealer verify all torque specifications for engine components.
What should be checked regarding the transmission and drivetrain?
The machine utilizes a hydrostatic transmission type. When servicing the hydraulic system, specifically when replacing variable motor assemblies, ensure the toothing is greased before remounting and that all lines are reconnected so markings coincide. After any hydraulic service involving the tank, you must vent the hydraulic oil tank. For the axles, maintain correct fluid levels for both the front and rear axle/differential components.
What is a critical inspection point when purchasing a used WA65-3 (S/N HA940051-HA940548)?
Verify the exact serial number and engine model to ensure parts compatibility, as this machine uses the 4D 94E engine. Inspect the hydraulic system for signs of overheating or internal leakage by testing performance when the oil is hot. Check the condition of the radiator and oil coolers for debris blockage. Additionally, inspect the bucket, pins, and linkage for excessive wear, and verify that all hydraulic functions (raise, lower, dump) operate smoothly without significant drift.
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 WA65-3(S/N HA940051-HA940548). Related factory variants of the same model family:
WA65-3(30km/h Option S/N HA940549-HA940771 & H20772-UP)WA65-3(S/N HA940549-HA940771 & H20761-UP)
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