Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA65-3(S/N HA940549-HA940771 & H20761-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA65-3 (S/N HA940549-HA940771 & H20761-UP) is a compact class wheel loader featuring a 4-cylinder 4D 94E engine delivering 37.3 kW (50 hp). This machine operates with a hydrostatic transmission and an operating weight of approximately 4,260 kg (9,391.7 lb). 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 WA65-3 series, characterized by its hydrostatic drive system and high-penetration power. In today's used parts market, this machine remains significant due to the availability of Komatsu genuine components and the durability of the 4D 94E powertrain. Maintenance of the hydraulic closed-loop system and engine oil integrity is critical for preserving resale value and operational uptime.
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 HA940549-HA940771 & H20761-UP) specifications
Engine
| Model | 4D 94E |
| Net Power | 50 hp (37.3 kW) |
| Displacement | 2,776 cc (169.4 cu in) |
| Cylinders | 4 |
| Max Torque | 121.7 lb-ft (165.0 N-m) @ 1600 rpm |
Weights
| Operating Weight | 4,259.2 kg to 4,260 kg (9,390 lb to 9,391.7 lb) |
| Static Tipping Weight | 7,716.2 lb (3,500 kg) |
Dimensions
| Length with Bucket on Ground | 5.12 m (16.79 ft) |
| Height to Top of Cab | 3 m to 3 m (9.57 ft to 10 ft) |
| Wheelbase | 2 m to 182.9 cm (6.4 ft to 72 in) |
| Ground Clearance | 0 m to 39.6 cm (0 ft to 1.3 ft) |
| Bucket Width | 2 m to 6.6 ft (182.9 cm to 6.07 ft) |
| Hinge Pin Max Height | 10.22 ft (304.8 cm) to 10 ft (3 m) |
| Reach at Max Lift and Dump | 2.56 ft (78 cm) to 3.3 ft (1 m) |
| Dump Clearance at Max Raise | 8.26 ft (243.8 cm) to 9.8 ft (3 m) |
Performance
| Max Speed - Forward | 20.1 km/h to 20 kph (12.5 mph to 13 mph) |
| Turning Radius | 12.2 ft (365.8 cm) to 144 in (365.8 cm) |
| Bucket Capacity - Heaped | 0.9 cu yd (0.7 m³) to 1.1 m³ |
| Breakout Force | 8,947.4 lb (4,058 kg) to 8,950 lb (4,059.6 kg) |
| Pump Flow Capacity | 14.6 gpm (55.3 lpm) to 15 gpm (55 lpm) |
| Raise Time | 5 sec |
| Lower Time | 2.4 sec |
| Dump Time | 1 sec |
| Rear Axle Oscillation | 24 degrees |
Service capacities (summary)
| Fuel Capacity | 20.4 gal (77.2 l) to 20 gal (77 l) |
| Hydraulic System Fluid Capacity | 70 L to 70 l (18.5 gal to 19 gal) |
| Engine Oil Fluid Capacity | 9.5 l to 9 l (2.5 gal to 2.4 gal) |
| Cooling System Fluid Capacity | 10.2 l to 10 l (2.7 gal to 2.6 gal) |
| Front Axle/Diff Fluid Capacity | 6.4 l to 6 l (1.7 gal to 1.6 gal) |
| Rear Axle/Diff Fluid Capacity | 1.8 gal (6.8 l) to 1.8 gal (7 l) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA65-3(S/N HA940549-HA940771 & H20761-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 9.5 L (2.5 gal) | Komatsu Diesel Engine Oil (SAE 5W-30 or SAE 10W/30 per climate/spec) |
| Cooling system | 10.2 L (2.7 gal) | Komatsu Super Coolant AF-NAC |
| Fuel tank | 77.2 L (20.4 gal) | |
| Transmission/powertrain compartments | Varies by configuration/series: 1.3 L (0.34 gal) for transfer box; 15.1 L to 18.9 L (4.0 to 5.0 gal) total capacity range for transmission oil based on TO10 or TO30 specifications | Komatsu Powertrain Oil (TO10 or TO30) |
| Final drives (each) | 6.4 L (1.7 gal) Front Axle/Diff; 6.8 L (1.8 gal) Rear Axle/Diff | Komatsu Axle Oil (AXO 80) |
| 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 HA940549-HA940771 & H20761-UP) 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 HA940549-HA940771 & H20761-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every major service interval to monitor wear metals like iron, copper, and lead. Regularly sample hydraulic oil to track particle counts and viscosity changes. Monitoring coolant for pH levels and SCA concentration prevents internal corrosion. These laboratory-grade analyses allow for identifying potential pump or engine failures before they cause catastrophic downtime.
Corrective & Common Repairs
Monitor hydraulic hoses for cracks or leaks to prevent pressure loss in the closed hydraulic system. Inspect articulation and steering pins regularly; if play is detected, replacement of worn pins and bushings is required. Watch for fuel-water separator contamination which can damage injectors. Ensure the 12V electrical system and alternator output remain stable to avoid starting failures.
Overhaul & Rebuild Points
At 2,000-hour milestones, execute a full hydraulic oil change and transmission service. Major component evaluation should include inspecting the turbocharger and checking valve clearances. For high-hour machines, evaluate the structural integrity of bucket linkage and hinge pins. Comprehensive rebuild points must address the replacement of worn hydraulic hoses and a complete coolant system flush to maintain thermal efficiency.
Seasonal & Environment Servicing
In dusty environments, frequently inspect the air filter outer element and clean radiator fins to prevent overheating. During cold operations, ensure engine oil viscosity is appropriate and check for fuel waxing. In high-moisture areas, prioritize draining the water separator daily and inspecting the undercarriage/chassis components for corrosion or excessive debris buildup in the cooling system.
WA65-3(S/N HA940549-HA940771 & H20761-UP) 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 HA940549-HA940771 & H20761-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure or engine control drive system circuit malfunction (may cause engine stall) | Engine controller (ECM) power disruption, wiring harness issues, or fuse/ground failures | Inspect ECM power connections, fuses, and ground wires; examine interfacing points |
| E11 | Engine control system failure resulting in reduced output power to protect the engine | High coolant temperature, low oil pressure, or clogged air filter | Check coolant temperature, oil pressure, and air filter condition |
| E15 | Engine sensor malfunction (temperature, fuel pressure, or oil pressure) | Faulty engine sensors or electrical signal errors | Inspect and test temperature, fuel pressure, and oil pressure sensors |
| CA144 / CA145 | Coolant temperature sensor feedback voltage fault (High or Low) | Sensor failure, short circuit, or open circuit in the coolant temperature sensor wiring | Verify sensor integrity and inspect wiring for shorts or breaks |
| CA153 / CA154 | Intake air temperature sensor feedback voltage fault (High or Low) | Faulty intake air temperature (IAT) sensor or wiring issues | Replace or test the IAT sensor and associated harness |
| CA234 | Engine overspeed | Throttle calibration error, excessive engine load cycle, or operator misuse | Verify throttle calibration and check for improper engine loading |
| AA10NX | Air cleaner clogging | Accumulated dust or debris in the air filter element | Replace the air filter element |
| B@BCNS | Engine coolant overheating | Low coolant level, radiator fin blockage, or fan belt failure | Check radiator fins, fan belt, and coolant level |
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 HA940549-HA940771 & H20761-UP) attachments & work tools
Buckets
Standard and heavy-duty buckets available with heaped capacities ranging from 0.55 m³ (0.7 yd³) to 1.1 m³ (1.44 yd³). Bucket widths are typically 1.83 m (6 ft) to 2.0 m (6.56 ft).
Forks
Fork attachments are compatible for material handling applications.
Mounting & Hydraulics
Machines may be configured with mechanical quick hitch or hydraulic quick hitch systems. The closed hydraulic system supports attachment operation via a pump flow of 14.6 GPM (55.3 LPM).
Factory Configurations & Guarding
Standard configurations include a ROPS cabin and standard shovel with teeth. Optional features include air conditioning for optimized cab climate.
All WA65-3(S/N HA940549-HA940771 & H20761-UP) assemblies by section
Every catalogued assembly group for the Komatsu WA65-3(S/N HA940549-HA940771 & H20761-UP). 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 01 Engine, Engine Mounting : 10 Engine Lubrication
| 07***10 | Hose | 1 |
| 42***70 | Hose Assembly | 1 |
| 42***10 | Drain Valve | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 01 Engine, Engine Mounting : 25 Injection Pump
| YM***00 | Gasket | 1 |
| YM***40 | Screw | 2 |
| YM***00 | Gasket | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 02 Cooling System : 73 Radiator
| 01***25 | Washer,Spring?For Additional Rear Lam | 6 |
| 01***12 | Washer,(With Body Positioner) | 12 |
| 41***60 | Nut | 6 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 02 Cooling System : 74 Radiator Attaching Parts
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 3 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
03 Electric System
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 42 Alternator
| YM***20 | Rectifier Kit | 1 |
| YM***02 | Bolt Plated | 4 |
| YM***22 | Screw | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 43 Starter Motor
| YM***20 | Shift Lever Ass'Y | 1 |
| YM***10 | Housing | 1 |
| YM***60 | Cover, Rear | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 56 Electric System, Lighting Unit
| 01***16 | Screw, Mount Parking Lights | 4 |
| 42***60 | Plain Washer | 4 |
| 42***70 | Nut | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 61 Electric System, Kabelbaum
| 01***16 | Screw | 2 |
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 68 Radio
| 01***12 | Screw,(Without Ashtray) | 2 |
| 42***00 | Sleeve | 1 |
| 42***50 | Antenna | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 03 Electric System : 71 Back Up Alarm
| 08***34 | Tie, Cable | 3 |
| 42***00 | Sleeve | 4 |
| 42***60 | Hose | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 04 Transmission, Universal Joint : 61 Axial Piston Pump
| 42***20 | Screw | 4 |
| 42***01 | Axial Piston Pump | 1 |
| 42***00 | Pump | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 04 Transmission, Universal Joint : 75 Universal Joint
| 42***00 | Universal Joint | 1 |
| 42***01 | Lubrication Nipple | 2 |
| 42***30 | Nut | 12 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 04 Transmission, Universal Joint : 97 Hydraulic Pump Drive
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 04 Transmission, Universal Joint : 98 Axial Piston Engine
| 42***62 | Grub Screw | 2 |
| 42***01 | Axial Piston Engine | 1 |
| 42***58 | Plug | 2 |
05 Rear Axle
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 05 Rear Axle : 43 Rear Axle
| 01***16 | Nut - M20 | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 8 |
| 42***10 | Rear Axle | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 05 Rear Axle : 44 Axle Insert
| 42***40 | Screw | 12 |
| 42***42 | Screw | 8 |
| 42***03 | Shim | 2 |
06 Disc Wheel, Chain
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 06 Disc Wheel, Chain : 77 Disc Wheel
07 Steering
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 07 Steering : 01 Steering Column
| 42***80 | Steering Column | 1 |
| 42***01 | Nut | 1 |
| 42***02 | Rubber Washer | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 07 Steering : 05 Steering, Pipings
| 01***25 | Bolt,Sight | 4 |
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***60 | Bolt, Mounting | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 07 Steering : 07 Steering Cylinder
| 42***50 | Seal | 1 |
| 42***60 | Ball And Socket Join | 2 |
| 42***70 | Snap Ring | 4 |
08 Front Axle
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 10 Frame : 02 Frame
| 01***12 | Bolt,(With Speedometer) | 8 |
| 01***16 | Bolt, Mount Solenoid Valve | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 10 Frame : 03 Hinge
| 01***25 | Screw | 8 |
| 01***30 | Screw | 4 |
| 01***40 | Screw | 6 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 10 Frame : 06 Fender
| 42***90 | Nut | 8 |
| 42***00 | Nut | 4 |
| 42***60 | Plain Washer | 8 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 10 Frame : 12 Counterweight
| 01***60 | Flat Washer - M20 (Hardened) | 4 |
| 42***10 | Ring | 2 |
| 42***80 | Pin,Spring | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 10 Frame : 14 Platform
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 01***12 | Washer,(With Body Positioner) | 6 |
| 42***90 | Gasket | 1 |
11 Drivers Cab
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 01 Safety Cabin, Doors
| 01***20 | Screw | 6 |
| 42***60 | Screw | 4 |
| 42***40 | Nut | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 04 R.O.P.S. Canopy
| 01***20 | Bolt,(Without Air Con. Or Heater) | 3 |
| 01***08 | Washer,(For Mounting First Aid Kit) | 3 |
| 42***90 | Nut | 8 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 11 Soundproofing Of Cabin
| 42***80 | Screw | 14 |
| 42***30 | Air Nozzle | 2 |
| 42***00 | Cladding | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 12 Soundproof, Platform
| 42***50 | Insulating Mat | 1 |
| 42***70 | Insulating Mat | 1 |
| 42***80 | Insulating Mat | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 18 Heater
| 01***16 | Bolt, Mounting Transmission Control Switch | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 11 Drivers Cab : 19 Air Conditioner
| 01***16 | Bolt, Mounting Transmission Control Switch | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 12 Tools, Accessory, Lettering : 02 Tools
| 42***30 | Tool Bag | 1 |
| 42***10 | Tool Set | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 12 Tools, Accessory, Lettering : 03 Lettering
| 09***81 | Plate? Caution,Don'T Jump Start | 1 |
| 41***40 | Note Plate | 3 |
| 42***80 | Note Plate | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 12 Tools, Accessory, Lettering : 05 Decals, English
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 01 Hydraulic System
| 01***65 | Capscrew | 4 |
| 01***10 | Screw | 1 |
| 01***25 | Bolt,Sight | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 07 Check Port
| 42***60 | Brace | 4 |
| 42***90 | Plug | 2 |
| 42***30 | Teepiece | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 08 Pipings For Remote Control Valve
| 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 26 Lift Cylinder
| 42***10 | Lift Cylinder | 1 |
| 42***19 | Stripper | 1 |
| 42***20 | Seal | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 28 Bucket Cylinder
| 42***70 | Bucket Cylinder | 1 |
| 42***02 | Stripper | 1 |
| 42***03 | Seal | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 13 Hydraulic System : 31 Hose Rupture Safety Device
| 01***50 | Capscrew | 4 |
| 01***30 | Screw | 4 |
| 04***10 | Clip,(Without Cab) | 3 |
14 Boom, Thrust Frame - Arm
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 14 Boom, Thrust Frame - Arm : 00 Boom
| 01***30 | Bolt - Pin Mounting | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 8 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
15 Equipment
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 00 Bucket
| 42***00 | Bucket | 1 |
| 42***20 | Reinforcement | 2 |
| 42***40 | Blade | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 04 Fork Lift
| 42***30 | Fork | 2 |
| 42***00 | Locator | 2 |
| 42***80 | Carrier | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 05 Grab Bucket
| 01***13 | Nut,(For Adjustable Rod) | 8 |
| 42***21 | Grab Bucket | 1 |
| 42***01 | Backplate | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 11 Return To Dig
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 48 Sweeper
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***03 | Nut,(With Joy Stick Steering) | 2 |
| 08***34 | Tie, Cable | 15 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 15 Equipment : 49 Crane Boom
| 42***00 | Screw | 2 |
| 42***12 | Boom | 1 |
| 42***13 | Suspension Unit | 1 |
Komatsu : Wa65-3(S/N Ha940549-Ha940771 & H20761-Up) : 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 Ha940549-Ha940771 & H20761-Up) : 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 HA940549-HA940771 & H20761-UP) serial number reference
The PIN plate is located on the front frame, specifically on the right-hand side of the articulation joint. To read the prefix, identify the first three characters of the serial number sequence stamped on this plate.
| Prefix | Identifies | Notes |
|---|---|---|
| HA | WA65-3 (S/N HA940549-HA940771 & H20761-UP) | Identifies the wheel loader family and specific build sequence for this generation. The numeric portion following the WA prefix tracks bucket or tonnage class, with WA65 representing a smaller class machine. |
Frequently asked questions
What engine is installed in this WA65-3 configuration?
This machine is equipped with a 4-cylinder Komatsu 4D 94E engine, providing 37.3 kW (50 hp) of net power.
What is the operating weight of the WA65-3?
The operating weight for this series is approximately 4,260 kg (9,391.7 lb).
What model replaced the WA65-3?
The WA65-6 is a later generation compact loader in the Komatsu lineup.
What WA65-3(S/N HA940549-HA940771 & H20761-UP) owners discuss
What are the common hydraulic performance symptoms to look for in the WA65-3?
If all hydraulic functions (boom, arm, bucket, etc.) become slow simultaneously, investigate shared issues like hydraulic oil level, incorrect oil specification, or pump/engine speed. If only one specific function is slow, check for cylinder leakage, valve spool operation, or hose restrictions in that specific circuit. Note that if hydraulics work well when cold but lose strength once the machine reaches operating temperature, this often indicates internal leakage due to decreased oil viscosity.
What engine model is used in the WA65-3 (S/N HA940549-HA940771 & H20761-UP) and what are its key specs?
The machine uses the 4D 94E engine (also associated with Yanmar 4TNE94 models). Key specifications include a net power of 37 kW (50 hp), a displacement of 2,776 cc (169.4 cu in), and a maximum torque of 121.7 lb-ft measured at 1600 rpm.
What should be checked if the engine loses power while working under load?
First, check for basic restrictions: air-filter condition, fuel filters, and fuel tank venting. On turbocharged engines, inspect intake and charge-air hoses for loose clamps or damage. It is critical to observe whether the engine RPM drops significantly when hydraulics are engaged; a heavy drop in RPM suggests the hydraulic system is placing excessive load on the engine or the engine cannot produce expected power.
What are the typical fluid capacities and maintenance considerations for the WA65-3?
Standard capacities include: Engine oil 9 L (2.5 gal); Cooling system 10 L to 10 L (2.7 gal to 2.6 gal); Hydraulic system 70 L to 70 L (18.5 gal to 19 gal); Fuel tank 77 L to 77 L (20.4 gal to 20 gal); Front axle/diff 6 L to 6 L (1.6 gal to 1.6 gal); and Rear axle/diff 7 L to 7 L (1.8 gal to 1.8 gal). When replacing a variable motor, ensure the toothing is greased before remounting and verify hydraulic oil levels after venting the tank.
What electrical or sensor-related issues might cause an engine starting failure?
If the engine fails to crank, check battery state of charge, battery terminals, engine/chassis grounds, the main starter cable, and the starter relay. If the engine cranks but will not fire, investigate fuel level, fuel quality, fuel filters, water separator status, and potential air in the fuel supply.
What should be checked when buying a used WA65-3 (S/N HA940549-HA940771 & H20761-UP)?
Inspect the cooling package (radiator, oil cooler, and charge-air cooler) for debris buildup between stacked coolers. Check the hydraulic system for signs of overheating or internal leakage by testing performance both cold and hot. Verify the condition of the tires (405/70 R18 SPT 9) and check for any unusual noise in the final drives or hydraulic pumps. For any major component replacement, such as a compressor or motor, have your dealer verify the exact serial-prefix specification and part compatibility.
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 HA940549-HA940771 & H20761-UP). Related factory variants of the same model family:
WA65-3(30km/h Option S/N HA940549-HA940771 & H20772-UP)WA65-3(S/N HA940051-HA940548)
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