Komatsuwheel loaderlarge (wa400 - )
Komatsu WA400-5(S/N 70001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA400-5 (S/N 70001-UP) is a heavy-duty 4WD wheel loader designed for earthmoving and quarrying applications. This series features a turbocharged engine delivering 154 kW (208 HP) at 2,000 rpm. The machine operates within a weight range of approximately 18,997 kg (41,887 lb), with specific configurations varying by attachment package. It is engineered for high-productivity tasks such as loading sand, gravel, and dirt into conveyors or dump trucks.
The WA400-5 generation introduced enhanced environmental compliance, meeting EC 2000/14, VIII and EC 97/68 Stage II regulations. This series remains significant in the used market due to its high resale value, durability, and the integration of KOMTRAX telematics for remote monitoring. Maintenance is streamlined through the Komatsu CARE program, which provides factory-scheduled inspections and KOWA fluid analysis, making it a reliable choice for fleet managers focused on total cost of ownership.
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 WA400-5(S/N 70001-UP) specifications
Engine
| Model | SAA6D114 E-2 |
| Gross Power | 208 hp (154 kW) |
| Cylinders | 6 |
| Displacement | 504.7 cu in |
| Aspiration | Turbocharger |
| Emissions Tier | EC 2000/14, VIII and EC 97/68 Stage II |
Weights
| Operating Weight | varies by configuration: 17,700 kg (39,000 lb) to 42,031.2 lb (19,068 kg) |
| Static Tipping Weight | 34,226.8 lb (15,525 kg) |
Dimensions
| Length With Bucket On Ground | 27.1 ft (8.26 m) |
| Width Over Tires | 9.63 ft (2.94 m) |
| Height To Top Of Cab | 11.11 ft (3.39 m) |
| Wheelbase | 10.83 ft (3.30 m) |
| Ground Clearance | 1.51 ft (0.46 m) |
| Hinge Pin - Max Height | 13.63 ft (4.15 m) |
| Reach At Max Lift And Dump | 3.66 ft (1.12 m) |
Performance
| Max Speed - Forward | 24 mph (38.6 km/h) |
| Max Speed - Reverse | 24.7 mph (39.8 km/h) |
| Bucket Capacity - Heaped | 4.32 yd³ to 4.4 yd³ |
| Breakout Force | 36,508.97 lb (16,561 kg) |
| Turning Radius | 19.8 ft (6.04 m) |
| Hydraulic Pump Flow Capacity | 79.8 gpm (302 L/min) |
Service capacities (summary)
| Fuel Tank | 79.3 gal (300 L) |
| Hydraulic System Fluid Capacity | 34.1 gal (129 L) |
| Engine Oil Fluid Capacity | 8.5 gal (32 L) |
| Cooling System Fluid Capacity | 9.6 gal (36 L) |
| Transmission Fluid Capacity | 10.1 gal (38 L) |
| Front Axle/Diff Fluid Capacity | 10.1 gal (38 L) |
| Rear Axle/Diff Fluid Capacity | 10.1 gal (38 L) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WA400-5(S/N 70001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | not documented for this exact serial range — verify with your dealer | Komatsu engine oil |
| Cooling system | not documented for this exact serial range — verify with your dealer | Komatsu Super-coolant AF-NAC |
| Fuel tank | not documented for this exact serial range — verify with your dealer | not documented for this exact serial range — verify with your dealer |
| Transmission/powertrain compartments | not documented for this exact serial range — verify with your dealer | Komatsu powertrain oil |
| Final drives (each) | not documented for this exact serial range — verify with your dealer | not documented for this exact serial range — verify with your dealer |
| Hydraulic system and tank | not documented for this exact serial range — verify with your dealer | Komatsu hydraulic oil (10wt or 46wt depending on configuration/series) |
| Axles/differentials | not documented for this exact serial range — verify with your dealer | Komatsu axle oil |
| Grease | not documented for this exact serial range — verify with your dealer | not documented for this exact serial range — verify with your dealer |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WA400-5(S/N 70001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,500 h |
|
| Every 9,000 h |
|
Servicing the WA400-5(S/N 70001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every major service interval to monitor engine oil, hydraulic fluid, and coolant. KOWA tracks wear metals like iron and copper, as well as contaminants such as silicon or sodium. Use KOMTRAX telematics to track fuel consumption, fault codes, and DEF levels remotely. Regular sampling of transmission and axle oils ensures early detection of component degradation before catastrophic failure occurs.
Corrective & Common Repairs
Monitor hydraulic hoses for cracks or leaks to prevent pressure loss. Inspect the articulation pins and steering linkage regularly; excessive play requires replacement of worn bushings. Check the brake system, specifically inspecting pads and ensuring adequate brake oil pressure. If the engine system caution lamp illuminates, check the SCR information screen for maintenance messages regarding the aftertreatment system.
Overhaul & Rebuild Points
Plan for major component replacement at high-hour milestones. The Komatsu Diesel Particulate Filter (KDPF) requires exchange at approximately 4,500 and 9,000 hours. At the 2,000-hour mark, perform a comprehensive evaluation of the transmission, torque converter, and axles. Structural inspections should focus on boom and bucket welds, while hydraulic cylinder rods must be checked for scoring to prevent seal damage.
Seasonal & Environment Servicing
In dusty environments, frequently clean radiator and oil cooler fins to prevent overheating. Ensure the radiator fan is switched to reverse operation if equipped. During cold weather operations, verify coolant concentration and use appropriate lubricants. For machines operating in high-debris areas, increase the frequency of air filter inspections and ensure all grease points on the Z-bar linkage and bucket are fully lubricated.
WA400-5(S/N 70001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 424-01-H2260 | Air Filter | Air intake service | Check fitment → |
| 6732-21-5530 | Cartridge, Engine Oil Filter | Lubrication service | Check fitment → |
| 6742-01-2500 | Head, Lubricating Oil Filter | Lubrication service | Check fitment → |
| 6742-01-4540 | Cartridge, Oil Filter | Lubrication service | Check fitment → |
| 07063-01210 | 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.
WA400-5(S/N 70001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure or engine speed/backup speed sensor error | Broken sensor, wiring harness damage, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA234 | Engine overspeed | Throttle calibration error, excessive engine load cycle, or operator misuse | Verify throttle calibration and check engine load conditions |
| CA441 / CA442 | Battery voltage too low or too high | Faulty alternator, depleted battery, or malfunctioning voltage regulator | Replace the alternator or battery and check the voltage regulator |
| CA451 / CA452 | Common rail pressure sensor feedback error (High or Low) | Malfunctioning fuel rail pressure sensor or fuel pump line issues | Diagnose the fuel rail pressure sensor or inspect pump lines |
| CA153 / CA154 | Intake air temperature sensor error (High or Low) | Faulty intake air temperature (IAT) sensor or wiring issue | Replace or test the IAT sensor |
| CA122 / CA123 | Intake air pressure sensor feedback error (High or Low voltage) | Sensor short circuit, airflow restriction, or wiring fault | Verify the intake pressure sensor and associated wiring |
| E10 | Engine controller power failure or engine control drive system malfunction | ECM power connection failure, blown fuses, or ground wire issues | Inspect ECM power connections, fuses, and ground wires |
| AA10NX | Air cleaner clogging | Excessive dust accumulation in the air filter | Replace the air filter element |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA400-5(S/N 70001-UP) attachments & work tools
Buckets
Standard and heavy-duty buckets available with capacities ranging from 3.3 m³ (4.32 yd³) to 5.5 m³ (7.19 yd³). The machine features a bucket breakout force of approximately 36,509 lb (16,560 kg).
Hydraulic Attachments
The machine supports specialized attachments such as a timber grab featuring a sturdy structure and a special tilting cylinder. A comprehensive range of other hydraulic tools is available for diverse applications.
Mounting & Coupler Systems
A coupler is available as optional equipment to facilitate quick tool changes. The machine can also be configured with mechanical quick hitch or hydraulic quick hitch systems.
Hydraulic & Control Options
Optional configurations include EPC fingertip controls and a multifunctional lever design. A multi-adjustable hydraulic console is standard for ergonomic operation.
Factory Configurations & Guarding
Standard builds include a ROPS cabin with a standard shovel and teeth. The radiator fan can be switched to reverse operation from the cabin for improved performance in dusty environments.
All WA400-5(S/N 70001-UP) assemblies by section
Every catalogued assembly group for the Komatsu WA400-5(S/N 70001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
01 Engine, Engine Mounting
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 00 Maintenance Kit
| 07***00 | O-Ring (Kit) | 1 |
| 07***10 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(F4350-59a0 -23 ) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 01 Engine, Engine Mounting
| 01***50 | Capscrew | 8 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 02 Cylinder Block And Attaching Parts
| 62***10 | Screw | 1 |
| 62***10 | Seal, O-Ring (M10-1.00) | 1 |
| 62***50 | Draincock (1/4 Nptf) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 04 Crank Assembly
| 67***50 | Gear, Crankshaft | 1 |
| 67***20 | Washer, Plain (M12) | 8 |
| 67***30 | Bolt (M12x1.25x32) | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 05 Cylinder Head And Attaching Parts
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 07***11 | Hose, Flexible | 5 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 07 Cylinder Head Cover, Attaching Parts
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 08 Timing Gear Case And Flywheel Housing
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
| 04***08 | Clip | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 09 Engine Timing Gear
| 67***20 | Support, Camshaft Thrust | 1 |
| 67***60 | Bolt (M8x1.25x22) | 2 |
| 67***80 | Key, Plain Woodruff (4.0mm) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 10 Engine Lubrication
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 07***16 | Gasket,Air Compressor Piping | 1 |
| 07***59 | Clamp - Drain Hose | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 14 Oil Filter
| 12***H1 | Compression Spring | 1 |
| 67***51 | Valve, Pressure Relief | 1 |
| 67***30 | Plug, Pipe (1/8 Nptf) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 15 Water Pump
| 67***60 | Bolt, Mounting (M8-1.25x25) | 2 |
| 67***20 | Seal (K2) | 1 |
| 67***30 | Water Pump Ass'Y | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 17 Fan, Belt Tensioner
| 01***30 | Bolt,(With Body Positioner) | 6 |
| 01***45 | Bolt,(With Water Separator Type) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 18 V-Belt Arrangement
| 01***90 | Screw | 4 |
| 19***40 | Bushing | 4 |
| 67***30 | Belt,Water Pump | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 19 Cooling System
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***05 | Nut (Welded) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 20 Injection System
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***12 | Gasket,Injection Pump Piping | 3 |
| 07***90 | Hose - Fuel Return From Injection Pump | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 21 Injection Pump
| 01***85 | Screw | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 26 Fuel Pump
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 2 |
| 07***14 | Screw, Banjo Connector (M10) | 1 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 27 Injection Pump Drive
| 67***60 | Seal, Rectangular Ring | 1 |
| 67***70 | Nut, Hex Flange (M10-1.50 Thd) | 4 |
| 67***20 | Stud (M10-1.50 (Both Ends)X42) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 28 Fuel System, Pre Filter
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
| 01***45 | Bolt, Bracket Mounting | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 30 Fuel System, Filter
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 46 Air Intake System, Standard
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***09 | Nut,(For Japan) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 48 Turbocharger
| 07***67 | Clamp, Hose | 4 |
| 13***91 | Connection Ass'Y,Oil Drain | 1 |
| 13***H1 | Hose | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 49 Air Filter System, Standard
| 01***14 | Bolt - Fuel Sensor Mounting | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***40 | Bolt,(Shim 3-Piece) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 54 Air Cleaner
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 4 |
| 01***08 | Nut,See Fig. K4010-04a0 | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 57 Exhaust System
| 01***85 | Bolt,(Used With Pin Puller) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 01 Engine, Engine Mounting : 60 Engine Control
| 01***16 | Bolt - Box Mounting | 3 |
| 01***25 | Capscrew | 3 |
| 01***20 | Bolt,(For Mono Lever Steering) | 10 |
02 Cooling System
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 73 Radiator
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 74 Radiator Attaching Parts
| 01***20 | Bolt,(For Mono Lever Steering) | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***10 | Bolt,(With Joy Stick Steering) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 75 Hydraulic Oil Cooling
| 01***16 | Bolt - Box Mounting | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 77 Cooling Water Pipes
| 02***28 | Elbow | 2 |
| 02***18 | O-Ring,(F5350-63a0 -17 ) | 2 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 78 Engine Oil Cooling
| 01***12 | Bolt,(See Fig. K0210-16a0) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 1 |
| 12***H1 | Compression Spring | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 02 Cooling System : 79 Transmission Oil Cooling
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
03 Electric System
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 42 Alternator
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 43 Startermotr
| 01***40 | Bolt,(For Operator'S Cab) | 2 |
| 01***10 | Nut, Plate Mounting | 1 |
| 60***10 | Starting Motor Ass'Y,(7.5kw) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 56 Electric System, Lighting Unit
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 2 |
| 01***16 | Screw,(For Joy Stick Steering) | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 61 Electric System
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***32 | Washer,(With Auto Emergency Steering) | 7 |
| 04***10 | Clip,(With Accumulator) | 5 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 64 Instrument Box And Attaching Parts
| 01***16 | Bolt - Box Mounting | 4 |
| 01***16 | Screw,(With Payload Meter) | 8 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 66 Windshield-Wiper - Washer System
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 70 Turning Light
| 01***20 | Screw | 3 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 41***10 | Bracket | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 71 Back Up Alarm
| 01***10 | Plain Washer | 8 |
| 14***30 | Harness, Wiring | 1 |
| 42***20 | Horn | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 74 Battery
| 01***50 | Bolt,(For D60pl) | 2 |
| 01***08 | Screw, Terminal | 3 |
| 01***10 | Screw,(For Lighter) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 03 Electric System : 75 Battery Main Switch
| 01***16 | Bolt - Box Mounting | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
04 Transmission, Universal Joint
Komatsu : Wa400-5(S/N 70001-Up) : 04 Transmission, Universal Joint : 75 Universal Joint
| 01***60 | Bolt, Upper Shaft Mounting | 8 |
| 42***10 | Ring, Snap | 4 |
| 42***10 | Shaft Assembly, Center | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 04 Transmission, Universal Joint : 85 Powershift Transmission
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***40 | Bolt, Mount Retainer | 12 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 04 Transmission, Universal Joint : 88 Gears And Shafts
| 41***33 | Spring, Wave | 24 |
| 41***40 | Ring, Snpa | 2 |
| 71***10 | Plate, End | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 04 Transmission, Universal Joint : 92 Powershift Transmission, Control Valve
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 2 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
05 Rear Axle
Komatsu : Wa400-5(S/N 70001-Up) : 05 Rear Axle : 43 Rear Axle
| 01***60 | Washer,(Without Rops Guard? Canopy) | 36 |
| 41***70 | Bolt, Mounting Rear Wheels | 36 |
| 42***00 | Axle Assembly, Rear | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 05 Rear Axle : 45 Differential
| 01***30 | Capscrew - M12 X 1.75 | 10 |
| 01***40 | Capscrew | 24 |
| 01***85 | Screw | 12 |
06 Disc Wheel, Chain
Komatsu : Wa400-5(S/N 70001-Up) : 06 Disc Wheel, Chain : 77 Disc Wheel
| 41***10 | Side Ring | 2 |
| 41***11 | Side Ring | 1 |
| 42***P2 | Circlip | 1 |
07 Steering
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 00 Steering, Steering Mounting
| 01***16 | Bolt - Box Mounting | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 01 Steering Column
| 01***40 | Screw | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 02 Steering Unit
| 41***30 | Cap, End | 1 |
| 41***60 | Plate, Spacer | 1 |
| 41***70 | Drive | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 04 Steering Valve, Pipings
| 01***40 | Bolt (Op) | 4 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 4 |
| 01***09 | Nut,(For Japan) | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 05 Steering, Pipings
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 06 Steering Cylinder And Pipings
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 02***A5 | Hose | 2 |
| 02***12 | O-Ring,(F2370-57a0 -49 ) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 07 Steering Cylinder
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***90 | O-Ring,(Y1620-41a0a-11) | 1 |
| 07***23 | O-Ring,(F4350-66a1 -1c ) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 12 Valve Block
| 42***01 | Valve, Steering Stop | 2 |
| 42***30 | Poppet | 1 |
| 42***40 | Compression Spring | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 07 Steering : 15 Steering
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
08 Front Axle
Komatsu : Wa400-5(S/N 70001-Up) : 08 Front Axle : 00 Front Axle
| 01***24 | Nut,Bearing | 8 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 36 |
| 01***80 | Washer,(For Shipping) | 16 |
Komatsu : Wa400-5(S/N 70001-Up) : 08 Front Axle : 02 Differential
| 01***30 | Screw | 10 |
| 01***45 | Capscrew - M16 | 24 |
| 01***20 | Capscrew | 12 |
09 Brake System
Komatsu : Wa400-5(S/N 70001-Up) : 09 Brake System : 00 Brake System
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 02***A4 | Hose | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 09 Brake System : 04 Brake Piping For Front And Rear Axle
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 09 Brake System : 05 Pressure Tank
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 02***12 | O-Ring,(F2370-57a0 -49 ) | 3 |
10 Frame
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 00 Front Frame
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
| 01***32 | Washer,(Without Gps Antenna Bracket) | 1 |
| 04***65 | Pin,Spring (For Chinese) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 01 Rear Frame
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***35 | Capscrew - M14 (1)/(2) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 03 Hinge
| 01***95 | Screw | 4 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 6 |
| 01***25 | Bolt, Pinlock | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 06 Fender
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
| 42***60 | Plain Washer | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 07 Radiator Guard
| 01***20 | Bolt,(For Mono Lever Steering) | 17 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt (Op) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 08 Bonnet
| 01***45 | Bolt,(With Water Separator Type) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***45 | Bolt, Mounting Cranking Motor | 3 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 10 Boody Guard
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***35 | Screw | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 14 Platform
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***65 | Bolt,(Without Rops) | 8 |
| 01***50 | Screw | 20 |
Komatsu : Wa400-5(S/N 70001-Up) : 10 Frame : 16 Ladder
| 01***30 | Bolt,(Not Used When Towing Winch) | 9 |
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 9 |
11 Drivers Cab
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 00 Safety Cabin : Unit_01_of_02
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***95 | Screw | 12 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 00 Safety Cabin : Unit_02_of_02
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 10 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***95 | Screw | 12 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 01 Safety Cabin, Doors : Unit_02_of_02
| 01***16 | Screw | 1 |
| 01***03 | Nut (Welded) | 1 |
| 01***05 | Washer,(Without Window Washer) | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 01 Safety Cabin, Doors : Unit_01_of_02
| 01***12 | Bolt - Front Cover Mounting | 6 |
| 01***14 | Screw | 4 |
| 01***25 | Bolt,(Rear Attachment Less) | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 11 Soundproofing Of Cabin
| 01***16 | Bolt - Box Mounting | 2 |
| 01***20 | Screw,(Australia Spec.) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 18 Heater
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
| 04***11 | Clip,See Fig. K4010-04a0 | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 19 Air Conditioner
| 01***16 | Bolt - Box Mounting | 4 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 27 Drivers Seat, Attaching Parts
| 02***19 | Bolt,Tether | 2 |
| 10***10 | Collar,Kab | 3 |
| 17***21 | Belt? Tether,Tether | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 11 Drivers Cab : 28 Drivers Seat
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***25 | Screw | 4 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
12 Tools, Accessory, Lettering
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 00 Wedge And Attachement
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***16 | Capscrew | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 02 Tools
| 09***06 | Wrench Set,8x10? 12x14? 13x17? | 1 |
| 09***00 | Wrench - Adjustable | 1 |
| 09***50 | Pliers | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 03 Lettering
| 09***00 | Plate? Mark,Komatsu? Rear | 2 |
| 09***30 | Plate? Mark,Mark? Galeo | 2 |
| 42***30 | Plate | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 04 Decals, German
| 09***00 | Tag,Do Not Operate (German) | 1 |
| 41***20 | Caution Plate | 2 |
| 42***20 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 05 Decals, English
| 09***00 | Tag,(For South And North America) | 1 |
| 42***70 | Decal | 1 |
| 42***60 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 06 Decals, French
| 42***10 | Caution Plate | 1 |
| 42***30 | Decal | 1 |
| 42***80 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 08 Decals, Italian
| 42***10 | Caution Plate | 1 |
| 42***30 | Decal | 1 |
| 42***80 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 09 Decals, Spanish
| 42***10 | Caution Plate | 1 |
| 42***40 | Decal | 1 |
| 42***80 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 10 Decals, Swedish
| 42***10 | Caution Plate | 1 |
| 42***50 | Decal | 1 |
| 42***90 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 11 Decals, Danish
| 42***30 | Caution Plate | 1 |
| 42***70 | Decal | 1 |
| 42***10 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 12 Decals, Finnish
| 42***70 | Caution Plate | 1 |
| 42***60 | Decal | 1 |
| 42***00 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 13 Decals, Norwegian
| 42***50 | Caution Plate | 1 |
| 42***40 | Decal | 1 |
| 42***80 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 14 Decals, Dutch
| 42***10 | Caution Plate | 1 |
| 42***00 | Decal | 1 |
| 42***40 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 15 Decals, Portuguese
| 42***90 | Caution Plate | 1 |
| 42***80 | Decal | 1 |
| 42***20 | Decal | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 12 Tools, Accessory, Lettering : 16 Decals, Greek
| 42***50 | Caution Plate | 1 |
| 42***90 | Decal | 1 |
| 42***30 | Decal | 1 |
13 Hydraulic System
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 00 Pumps For Hydraulic System
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***45 | Bolt, Mounting Cranking Motor | 4 |
| 01***00 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 01 Hydraulic System
| 01***60 | Bolt,(F4320-52a0 -5- ) | 4 |
| 01***45 | Bolt, Mounting Cranking Motor | 4 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 03 Hydraulic-Pump
| 70***00 | Pump Assembly (Sal80) | 1 |
| 70***70 | Pump Assembly, Work Equipment(Sal90) | 1 |
| 70***40 | Pump Assembly, (Sal20) P.P.C | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 06 Oil Tank
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***40 | Bolt (Op) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 09 Remote Control Valve
| 01***25 | Screw | 4 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 3 |
| 07***08 | O-Ring,(Tm8202-005) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 10 Pressure Pipings To Control Valve
| 01***30 | Screw | 2 |
| 01***35 | Screw | 4 |
| 01***45 | Screw | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 11 Control Valve, Return Pipings
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***35 | Screw | 2 |
| 01***35 | Screw | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 12 Control Valve
| 01***55 | Bolt - Mount Cage To Transmission Case | 4 |
| 01***95 | Capscrew - M12 | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 7 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 13 Valve Block
| 07***10 | O-Ring | 1 |
| 42***10 | Compression Spring | 1 |
| 42***20 | Plug | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 25 Lift Cylinder And Pipings
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 4 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***40 | Screw | 4 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 26 Lift Cylinder : Unit_02_of_03
| 01***60 | Capscrew | 12 |
| 01***16 | Screw,Nylon | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 26 Lift Cylinder : Unit_03_of_03
| 01***60 | Capscrew | 12 |
| 01***16 | Screw,Nylon | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 26 Lift Cylinder : Unit_01_of_03
| 01***30 | Bolt - Pin Mounting | 4 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
| 07***00 | Fitting, Grease (Steering Cylinder) | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 27 Bucket Cylinder And Pipings
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***20 | Capscrew | 2 |
| 01***35 | Screw | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 28 Bucket Cylinder
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***30 | Bolt - Pin Mounting | 2 |
| 01***35 | Screw | 8 |
Komatsu : Wa400-5(S/N 70001-Up) : 13 Hydraulic System : 40 Pipings For Accessory Equipment
| 01***35 | Screw | 32 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 8 |
| 01***45 | Bolt, Bracket Mounting | 4 |
14 Boom, Thrust Frame - Arm
Komatsu : Wa400-5(S/N 70001-Up) : 14 Boom, Thrust Frame - Arm : 00 Boom
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
| 07***00 | Fitting, Grease (Steering Cylinder) | 1 |
| 42***10 | Seal,Dust (Kit) | 8 |
15 Equipment
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 00 Bucket
| 42***20 | Skid | 4 |
| 42***00 | Skid | 4 |
| 42***30 | Bucket | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 02 Quick Change Device
| 01***20 | Bolt,(For Mono Lever Steering) | 16 |
| 01***32 | Washer,(With Auto Emergency Steering) | 14 |
| 42***21 | Pin Ass'Y | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 04 Fork Lift
| 01***80 | Screw | 2 |
| 42***03 | Prongs | 2 |
| 42***05 | Carrier | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 10 Ripper Tooth Wear Plate And Marker Light
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 2 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 4 |
| 01***50 | Wing Nut | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 12 Bucket Position Indicator
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 70 Central Lubrication
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 04***10 | Clip - Fuel Sensor Harness | 12 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 76 Counterweight
| 01***90 | Screw | 4 |
| 22***80 | Washer, Mount | 4 |
| 42***10 | Chain | 1 |
Komatsu : Wa400-5(S/N 70001-Up) : 15 Equipment : 89 Special Equipment Italy
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
| 01***70 | Screw | 1 |
WA400-5(S/N 70001-UP) 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 three characters of the serial number sequence; these characters denote the machine family and specific configuration.
| Prefix | Identifies | Notes |
|---|---|---|
| WA4 | WA400-5 (S/N 70001-UP) | Standard configuration for this serial range. Engine: SAA6D114E-2 (Cummins 6CT-8.3). Emissions: EC 2000/14, VIII and EC 97/68 Stage II. Production years: approximately 2002–2005. |
Frequently asked questions
What engine is used in the WA400-5?
The WA400-5 is equipped with a turbocharged engine producing 154 kW (208 HP) at 2,000 rpm.
What is the operating weight of this machine?
The standard operating weight is approximately 18,997 kg (41,887 lb), though this varies by configuration and attachments.
What replaced the WA400-5 in the Komatsu lineup?
The WA400-5 is part of a lineage that includes successor models such as the WA470-8.
What WA400-5(S/N 70001-UP) owners discuss
What engine is installed in the Komatsu WA400-5 (S/N 70001-UP)?
The machine is equipped with a Komatsu SAA6D114E-2 turbocharged engine producing 208 hp at 2,000 rpm.
What are the common hydraulic performance symptoms to watch for in this series?
Operators may experience slow hydraulic functions. If all functions (boom, arm, bucket) become weak simultaneously, investigate shared hydraulic supply, pump control, or engine performance. If only one function is slow, check for cylinder leakage, valve spool operation, or hose restrictions.
What transmission behavior has been reported when the machine reaches operating temperature?
Some users have reported that when the machine warms up, it may feel as though the parking brake is engaging during gear shifts or when moving to neutral, causing the machine to bind or move only a short distance.
What are the known electrical and sensor-related vulnerabilities for Komatsu machines?
Komatsu machines rely heavily on electronic control systems. Faulty sensors or unstable power supplies can trigger multiple warning signals, intermittent starting, dashboard failures, or random machine shutdowns.
What should be checked regarding the hydraulic system's oil condition and aeration?
Check for unusual pump noise or cavitation, which may indicate low oil levels or suction side issues. In some configurations, severe aeration can occur on the steering/lift side during bleeding processes; if a shaft seal replacement does not resolve fluid dumping into the transmission, further investigation is required.
What is the recommended procedure when inspecting a used WA400-5 for purchase?
Verify the exact serial-prefix specification sheet and installed attachment package. Check the engine for signs of oil burning or airflow restrictions, inspect the cooling package (radiator and oil coolers) for debris buildup between heat exchangers, and examine hydraulic cylinders for rod damage via guide rings.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific WA400-5(S/N 70001-UP) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.