Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WA120-3CS(S/N 10004-UP (FOR INDONESIA))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WA120-3CS is a mid-size articulated wheel loader designed for general construction, aggregate handling, and material loading in demanding environments. Produced from 1999 to 2001, this model succeeded the WA120-1 series and was later replaced by the WA120-3A emission-compliant variant. The WA120-3CS specifically denotes the Custom Specification configuration for the Indonesian market, serial numbers 10004 and up. It features a robust frame, high breakout force, and a bucket capacity ranging from 1.6 to 1.9 cubic yards, making it suitable for truck loading and stockpiling operations.
Across the WA120 generation, Komatsu refined the powertrain efficiency and hydraulic response, moving from the earlier WA120-1's mechanical controls to the more precise electronic monitoring and improved durability in the WA120-3 series. The WA120-3CS remains relevant in the used market due to its simple, serviceable design and widespread availability of parts in Southeast Asia. Its enduring presence is attributed to the reliability of the Komatsu S4D102E-1 engine and the ease of maintaining its hydraulic and transmission systems, which continue to support fleet operations in regions where the machine was originally deployed.
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 WA120-3CS(S/N 10004-UP (FOR INDONESIA)) specifications
Engine
| Model | 6D95L |
| Gross Power | 63 hp (47 kW) |
| Power Measured At | 2400 rpm |
| Displacement | 298.5 cu in (4.9 L) |
| Cylinders | 4 |
Weights
| Operating Weight | 16953.6 lb (7690 kg) |
| Static Tipping Weight | 13889.2 lb (6300 kg) |
Dimensions
| Length With Bucket On Ground | 19.9 ft in (6065 mm) |
| Width Over Tires | 7.39 ft in (2250 mm) |
| Height To Top Of Cab | 10.06 ft in (3065 mm) |
| Wheelbase | 8.54 ft in (2600 mm) |
| Ground Clearance | 1.28 ft in (390 mm) |
| Hinge Pin - Max Height | 11.32 ft in (3450 mm) |
| Reach At Max Lift And Dump | 3.24 ft in (985 mm) |
| Dump Clearance At Max Raise | 8.83 ft in (2690 mm) |
Performance
| Breakout Force | 13490 lb (60.01 kN) |
| Max Speed - Forward | 21.5 mph (34.5 km/h) |
| Max Speed - Reverse | 21.8 mph (35 km/h) |
| Rear Axle Oscillation | 24 degrees |
Service capacities (summary)
| Fuel Capacity | 35.2 gal (133 L) |
| Hydraulic Pump Flow Capacity | 30.4 gal/min (115 L/min) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu WA120-3CS(S/N 10004-UP (FOR INDONESIA)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the WA120-3CS(S/N 10004-UP (FOR INDONESIA)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil/Wear Analysis (KOWA) at every 500-hour interval to monitor engine wear metals and hydraulic system contamination. Check the hydraulic oil viscosity and water content regularly, as high moisture levels indicate seal failure or condensation issues. Inspect the transmission oil for copper wear, which signals torque converter or clutch degradation. Monitor the coolant SCA levels to prevent liner cavitation in the S4D102E-1 engine. Early detection of silica in the engine oil indicates air filter breach, while high iron levels suggest pump or gear wear.
Corrective & Common Repairs
Address frequent hydraulic hose failures by inspecting routing near the articulation joint for chafing against the frame. Replace worn steering cylinder seals to restore precise bucket control and prevent fluid loss. Check the main control valve spools for wear if lift or dump functions become sluggish or drift. Inspect the torque converter for overheating signs and replace the stator if power loss occurs during heavy loading. Replace worn axle pivot bushings to eliminate frame clunking and excessive vibration during articulation.
Overhaul & Rebuild Points
Plan for engine overhaul around 10,000 to 12,000 hours, focusing on piston ring wear and cylinder liner scoring in the S4D102E-1. Rebuild the transmission at 8,000 to 10,000 hours if clutch slippage persists after adjustment, replacing the torque converter and valve body. Inspect the final drive planetary gears and bearings for pitting or spalling, replacing the entire hub assembly if backlash exceeds limits. Check the hydraulic pump swash plate and piston barrels for scoring, replacing the pump if flow output drops below specification.
Seasonal & Environment Servicing
In high-dust Indonesian environments, clean the radiator and oil cooler fins daily to prevent overheating. Use Komatsu Super Coolant AF-NAC to protect against corrosion and freezing in high-altitude or cooler regions. In humid conditions, check the air intake system for moisture accumulation and replace the pre-cleaner element frequently. Inspect the electrical connectors for corrosion due to high humidity, applying dielectric grease to prevent short circuits. Adjust tire pressure for soft ground conditions to improve flotation and reduce tire wear.
WA120-3CS(S/N 10004-UP (FOR INDONESIA)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 09637-30161 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 600-211-5241 | Cartridge,Engine? Oil Filter | Lubrication service | Check fitment → |
| 600-181-9200 | Element Ass'Y,Outer | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WA120-3CS(S/N 10004-UP (FOR INDONESIA)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| AA10NX | Air Cleaner Clogging | Air filter element is blocked by dust or debris. | Inspect and replace the air filter element. |
| AB00KE | Charge Voltage Low / Battery Charge Voltage Low | Alternator malfunction, loose belt, or poor battery connection. | Check alternator output and battery terminals. |
| B@BCNS | Engine Water Overheat | Coolant level low, radiator blockage, or fan belt failure. | Check coolant level and inspect radiator fins. |
| B@HANS | Hydraulic Oil Overheat | Hydraulic oil cooler blockage or excessive system load. | Clean the hydraulic oil cooler and check oil level. |
| CA115 | Engine Ne and Bkup Speed Sensor Error | Faulty crankshaft speed sensor or wiring issue. | Inspect the speed sensor and its connector for damage. |
| CA122 | Chg Air Press Sensor High Error | Intake air pressure sensor fault or restricted airflow. | Verify intake pressure sensor operation and air filter status. |
| CA144 | Coolant Temp Sensor High Error | Coolant temperature sensor failure or actual overheating. | Test the coolant temperature sensor and verify engine temp. |
| CA234 | Engine Overspeed | Governor malfunction or throttle calibration error. | Verify throttle calibration and governor operation. |
| CA441 | Battery Voltage Low Error | Weak battery or charging system failure. | Test battery health and alternator charging voltage. |
| CA451 | Rail Press Sensor High Error | Fuel rail pressure sensor fault or actual overpressure. | Diagnose the fuel rail pressure sensor and pump lines. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WA120-3CS(S/N 10004-UP (FOR INDONESIA)) attachments & work tools
Standard Buckets
Factory specifications list heaped capacities of 1.84 yd3 (1.4 m3) and struck capacities of 1.57 yd3 (1.2 m3). Alternative configurations offer heaped capacities ranging from 1.6 to 1.9 cu yd (1.3 to 1.7 m3). The standard bucket width is 7.85 ft (2390 mm).
Specialty Buckets
A Batcher variant is documented with a heaped capacity of 1.9 yd3 (1.4 m3). Other sources indicate a minimum bucket capacity of 1.3 m3 for specific configurations. These variants are designed for loading aggregate into conveyors or feed hoppers.
Coupler Systems
Aftermarket suppliers list couplers compatible with the WA120 series. The service manual describes a main control valve with a bucket priority circuit for attachment operation. No specific factory quick-attach system is detailed in the provided specifications.
Hydraulic Kits
Aftermarket hydraulic kits are available for the WA120 series to support auxiliary attachments. The machine utilizes a tandem circuit with a bucket priority circuit for standard operation. Hydraulic pump flow capacity is 30.4 gal/min (115 L/min).
Guarding and ROPS
The machine includes ROPS (Roll-Over Protective Structure) components for the cab. The cab shell, door, glass, and hatch are listed as replaceable parts. The operating weight is 16953.6 lb (7690 kg) with a static tipping weight of 13889.2 lb (6300 kg).
All WA120-3CS(S/N 10004-UP (FOR INDONESIA)) assemblies by section
Every catalogued assembly group for the Komatsu WA120-3CS(S/N 10004-UP (FOR INDONESIA)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
6d95l-1af-12 Engine S/N 96999-Up
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Air Cleaner (With Extension)(#110730-)
| 01***65 | Bolt,(With Water Separator) | 2 |
| 01***06 | Nut | 6 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Air Intake(#110730-)
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 01***30 | Screw | 11 |
| 01***85 | Bolt | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Alternator (25a) (With Non Hardening Pulley) (Inner Parts)(#110730-)
| 60***30 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Alternator Mounting (25a) (With Non Hardening Pulley)(#110730-)
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***95 | Bolt | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Camshaft And Tappet(#102941-)
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***10 | Tappet | 12 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Cooling Fan(#110730-)
| 01***30 | Bolt,(Water Separator Spec.) | 6 |
| 01***30 | Screw | 6 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Corrosion Resistor(#117030-)
| 01***12 | Bolt,(See Fig.0501) | 2 |
| 01***35 | Screw | 1 |
| 01***35 | Bolt | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Crank Pulley (Non Hardening Pulley)(#110730-)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Crankshaft(#102941-)
| 62***00 | Main Metal Ass'Y | 7 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 7 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Cylinder Block (With Travel Damper)(#110730-)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Cylinder Block Gasket Kit(#110730-)
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***50 | O-Ring,Front Cover Plate | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Cylinder Head Gasket Kit(#110730-)
| 08***14 | Band,(For Additional Fuel Strainer) | 2 |
| 08***19 | Band,(Without Air Conditioner) | 2 |
| 61***30 | Gasket,Air Cleaner | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Cylinder Head(#110730-)
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
| 07***08 | Plug, Expansion | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Damper
| 01***16 | Bolt,(With Alternator Cover Type) | 6 |
| 62***00 | Damper,(Except Japan Pc200) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Engine Mounting(#110730-)
| 01***35 | Bolt, Mounting - Flywheel Housing End | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
| 41***11 | Bracket,R.H | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Exhaust Manifold(#110730-)
| 01***25 | Grub Screw | 2 |
| 01***45 | Bolt, Bracket Mounting | 10 |
| 61***50 | Nut | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Flywheel Housing(#110730-)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 01***05 | Screw | 2 |
| 07***15 | Plug | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Flywheel(#110730-)
| 01***30 | Bolt | 6 |
| 61***61 | Washer, Plain (14mm) | 6 |
| 62***92 | Gear,Ring | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Front Cover(#110730-)
| 01***16 | Bolt | 2 |
| 01***20 | Bolt,(With Tachometer Outlet) | 6 |
| 01***16 | Screw | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Front Hanger(#110730-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
| 01***32 | Washer, (Without Emergency Steering) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Filter(#110730-)
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
| 01***30 | Screw | 2 |
| 01***45 | Bolt | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)(#110730-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#110730-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***80 | Nut | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#110730-)
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#110730-)
| 62***90 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#110730-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 62***30 | Pipe,Oil | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Injection Pump Mounting(#110730-)
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Fuel Return(#110730-)
| 07***95 | Tube,Spill | 1 |
| 07***85 | Clip | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Glow Plug(#110730-)
| 60***70 | Glow Plug | 6 |
| 62***10 | Lead | 5 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Golw Relay(#110730-)
| 60***10 | Relay,Quick Grow System | 1 |
| 60***50 | Controller | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Head Cover(#102941-)
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 4 |
| 61***30 | Washer,(B) | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Holder (Inner Parts)(#110730-)
| 62***12 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.75mm | 0 |
| DK***00 | Shim? 1.200mm | 0 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Idler Gear(#102941-)
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 04***12 | Pin,Spring (See Fig.0201) | 1 |
| 62***31 | Shank | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Injection Nozzle(#110730-)
| 01***35 | Bolt, Mount Bracket To Floor | 6 |
| 07***00 | Clip | 11 |
| 62***10 | Carrier | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Injection Piping
| 01***25 | Screw | 4 |
| 61***30 | Clip | 1 |
| 62***00 | Clip Ass'Y | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Muffler(#110730-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
| 01***40 | Bolt,(Shim 3-Piece) | 3 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Name Plate And Caution (English) (Double Element Type)(#110730-)
| 09***61 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 62***10 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Cooler (With Travel Damper)(#102941-)
| 01***25 | Bolt,(With Corrosion Resistor) | 18 |
| 01***06 | Nut | 4 |
| 07***12 | T/Plug, Plug,(For Power Tilt Mech Angle) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Filler(#110730-)
| 01***16 | Screw | 4 |
| 61***20 | Cap Assembly, Oil Fill Tube | 1 |
| 61***80 | Gasket, Oil Fill Cap | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Filter(#110730-)
| 60***41 | Cartridge,Engine? Oil Filter | 1 |
| 62***10 | Nipple | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Level Gauge(#110730-)
| 62***10 | Guide,Oil Gauge | 1 |
| 62***60 | Gauge,Oil | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Pan And Suction Tube(#110730-)
| 01***16 | Bolt, Mount Solenoid Valve | 30 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Oil Pump (With Travel Damper)(#110730-)
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***10 | Valve | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Piston(#110730-)
| 04***12 | Ring, Snap | 12 |
| 62***03 | Piston Ring Ass'Y,Per Cylinder | 6 |
| 62***10 | Pin,Piston | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Rear Hanger(#110730-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***40 | Hanger,Rear | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Rocker Arm(#102941-)
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Safety Guard(#110730-)
| 01***16 | Bolt, Mount Solenoid Valve | 5 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***85 | Bolt,(For Reversible Fan) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Starting Motor (5.5kw) (Inner Parts)(#110730-)
| 60***10 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Field Coil Ass'Y | 1 |
| KD***30 | Bracket,Center | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Starting Motor Mounting (5.5kw)(#110730-)
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
| 01***35 | Screw | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Stop Motor(#110730-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 6 |
| 01***70 | Screw | 1 |
| 01***16 | Bolt | 3 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Water Pump Pulley (Non Hardenig Pulley)(#110730-)
| 04***54 | V-Belt Set | 1 |
| 62***51 | Pulley?Non Hardening,(With Tension Pulley) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : 6d95l-1af-12 Engine S/N 96999-Up : Water Pump(#110730-)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***50 | Bolt,(For Shipping) | 1 |
Accessory And Tool
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Accessory And Tool : Tool
| 07***90 | O-Ring,Grease Pump Strap | 1 |
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
Attachment
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Attachment : Vandalism Protection
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***06 | Nut | 1 |
| 01***23 | Washer,(With Auto Emergency Steering) | 1 |
Cooling System
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Cooling System : Cooling Piping (For Radiator)
| 07***89 | Clamp,(D31s) | 1 |
| 07***45 | Clamp,Hose | 3 |
| 41***10 | Hose,Upper | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Cooling System : Guard (For Radiator)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 8 |
| 41***20 | Guard,Fan? L.H | 1 |
| 41***30 | Guard,Fan? R.H | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Cooling System : Radiator (Radiator And Mounting)
| 01***45 | Bolt, Mounting Cranking Motor | 2 |
| 01***65 | Bolt,(Used With Pin Puller) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 8 |
Electrical System
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Battery
| 08***08 | Battery? Wet(75d31r),(Wet Type) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Battery Box (Box And Battery Mounting)
| 01***20 | Screw | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 8 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Electrical Instrument (Starter? Turn Signal? Positioner And Lamp Switch)
| 01***08 | Screw - Holder | 6 |
| 01***12 | Bolt,(See Fig. K0210-16a0) | 1 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Horn
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 42***10 | Horn,High | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Light And Mounting (Head Lamp And Support)
| 01***12 | Screw,Sems | 8 |
| 01***25 | Screw - Antenna Mounting | 4 |
| 01***20 | Bolt - Mount Risers To Cab Floor | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Light And Mounting (Rear Combination Lamp)
| 01***35 | Screw, Mount Lens | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 8 |
| 08***14 | Grommet,(For Eu Dynamic Noise) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Vehicle Inspection Parts
| 01***14 | Screw (Joystick Steering) | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 41***12 | Bracket | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Battery Cable And Rear Lamp Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 08***20 | Wire | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Floor Line)
| 01***12 | Screw (Without Radio Or Stereo) (2) | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 5 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Front Frame Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 04***12 | Clip, Hose | 2 |
| 08***19 | Band - Tie Hose To Wire Harness | 9 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Hst Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 08***19 | Band - Tie Hose To Wire Harness | 8 |
| 36***20 | Sensor,Hst Oil Temperature | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (R.H. Console Box Line)
| 01***20 | Screw | 2 |
| 01***12 | Bolt,(See Fig. K0210-16a0) | 6 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Rear Line)
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 5 |
| 08***14 | Clip,(For Two Levers Steering) | 5 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Electrical System : Wiring Harness (Slow Blow Fuse And Mounting)
| 01***12 | Bolt,(With Speedometer) | 1 |
| 41***40 | Wire | 1 |
| 42***20 | Fuse? 80a,Slow Blow 80a | 1 |
Engine Related Parts
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Engine Related Parts : Damper
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***55 | Bolt | 8 |
| 04***12 | Pin,Spring (See Fig.0201) | 12 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Engine Related Parts : Engine (Engine Harness)
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 7 |
| 04***10 | Clip,(For 1 Attachment And Pat) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Engine Related Parts : Engine (Engine Oil Drain Line And Air Cleaner Related Parts)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 07***16 | Gasket,Air Compressor Piping | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Engine Related Parts : Engine Mounting
| 01***35 | Bolt,(F4320-52a0 -5 ) | 12 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***20 | Capscrew - M16 X 20 | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Engine Related Parts : Exhaust Pipe
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 17***70 | Washer (Isolator Mounting) | 4 |
| 41***20 | Pipe,Exhaust | 1 |
Fuel Tank And Related Parts
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Fuel Tank And Related Parts : Fuel Line (Spill Tube Clip)
| 01***16 | Bolt - Starting Motor Ground Cable | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 04***10 | Clip,(Without Cab) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Fuel Tank And Related Parts : Fuel Line (Water Separator And Piping)
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***25 | Bolt - Relay Mounting | 2 |
| 01***06 | Nut | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Fuel Tank And Related Parts : Fuel Tank
Guard
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Counter Weight
| 01***80 | Bolt | 4 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 12 |
| 20***60 | Bolt | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Cover (For Floor Frame)
| 01***16 | Bolt - Starting Motor Ground Cable | 21 |
| 41***12 | Cover,L.H | 1 |
| 41***21 | Cover,L.H | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Front Fender
| 01***20 | Bolt - Mount Risers To Cab Floor | 6 |
| 09***08 | Cap,(For Ripper Or Rear Hydraulic. Take) | 6 |
| 41***11 | Fender,L.H | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Hood
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Hood (Grille)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 41***10 | Grille | 1 |
| 42***30 | Finisher | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Hood (Hood Mounting Parts)
| 01***16 | Bolt, Mount Solenoid Valve | 10 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 8 |
| 01***20 | Bolt - Mount Risers To Cab Floor | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Hood (Reserve Tank And Piping)
| 01***25 | Bolt - Relay Mounting | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 20***40 | Holding Clamp | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Hood Door
| 01***20 | Bolt - Mount Risers To Cab Floor | 16 |
| 01***12 | Washer,(With Body Positioner) | 4 |
| 04***33 | Pin,(For Cab) | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Ladder Rail
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
| 01***40 | Bolt,(For Operator'S Cab) | 2 |
| 01***10 | Nut, Plate Mounting | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Mirror
| 08***12 | Mirror | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Guard : Rear Fender
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 8 |
| 41***80 | Cushion | 2 |
| 41***10 | Fender,L.H | 1 |
Hydraulic System
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : 2-Spool Control Valve (Inner Parts)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 3 |
| 01***16 | Washer,(With Water Separator) | 3 |
| 36***30 | Stud,Tie | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : 2-Spool Control Valve (Mounting Parts)
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 3 |
| 01***55 | Bolt,(With Joy Stick Steering) | 3 |
| 41***10 | Plate | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Hydraulic Line (Delivery Line)
| 01***40 | Screw | 2 |
| 01***55 | Screw | 2 |
| 01***40 | Bolt,(For Operator'S Cab) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Hydraulic Line (Dump Cylinder Line)
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
| 01***75 | Bolt (M10-1.50x75) | 2 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Hydraulic Line (Lift Cylinder Line)
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 4 |
| 01***40 | Bolt,(For Operator'S Cab) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Hydraulic Line (Return Line)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 07***34 | O-Ring,(For Front Attachment) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Hydraulic Tank
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 1 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Pump (Hydraulic Pump And Mounting Parts)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| (7***0) | Pump Ass'Y | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Steering Demand Valve
| 41***01 | Valve Ass'Y,Steering | 1 |
| 41***00 | Orbitrol Ass'Y | 1 |
| 41***00 | Priority Valve Ass'Y | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Hydraulic System : Steering Hydraulic Line
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 04***10 | Clip,See Fig. K4010-05a0 | 1 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 3 |
Main/Revolving Frame And Related Parts
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Front Frame
| 41***01 | Frame,Front | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Hinge Pin (For Front And Rear Frame Connecting)
| 01***55 | Bolt,(Not Used For Chip Dozer) | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Lock And Cover (For Front And Rear Frame)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***60 | Bolt | 8 |
| 01***20 | Bolt - Mount Risers To Cab Floor | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Rear Axle Support
| 01***50 | Capscrew - M12 | 12 |
| 01***85 | Bolt | 4 |
| 01***13 | Nut,Plate (Welded) | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Rear Frame
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 41***01 | Frame,Rear | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Main/Revolving Frame And Related Parts : Steering Cylinder (Cylinder And Grease Fitting)
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
| 41***70 | Shim? 1.0mm | 10 |
| 70***11 | Cylinder Ass'Y,Steering? L.H | 1 |
Marks And Plates
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Marks And Plates : Marks And Plates
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***10 | Plate? Name,(Limited Supply) | 1 |
| 09***80 | Plate? Safety,Without E.S.Cover (Except Ec) | 2 |
Operatior'S Compartment And Control System
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Brake Pedal And Linkage)
| 01***22 | Bolt | 1 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 6 |
| 01***65 | Bolt - Transmission Tube Mounting | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Connecting Parts)
| 07***23 | O-Ring,(F4350-65a0 -16 ) | 4 |
| 41***20 | Nipple | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Front Piping)
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 41***22 | Tee | 1 |
| 41***20 | Tube | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Inching Valve)
| 01***45 | Screw | 2 |
| 02***10 | O-Ring | 1 |
| 02***15 | O-Ring | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Master Cylinder)
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***08 | Nut,See Fig. K4010-04a0 | 4 |
| 41***11 | Master Cylinder A | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Rear Piping)
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 01***70 | Screw | 1 |
| 41***10 | Tee | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Reseve Tank Piping)
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Brake Control (Resreve Tank)
| 41***80 | Reservoir Assembly, Brake | 1 |
| 41***90 | Sensor, Level | 1 |
| 41***10 | Cap | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Bucket Positioner
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 1 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 4 |
| 01***10 | Nut, Plate Mounting | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Canopy
| 01***50 | Bolt,(For D60pl) | 8 |
| 01***15 | Bolt | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Engine Control (Accelerator Pedal And Linkage)
| 01***16 | Bolt, Mounting Transmission Control Switch | 3 |
| 01***25 | Screw | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Floor
| 41***10 | Frame,Floor | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Floor (Dashboard)
| 01***12 | Screw (Instr. Panel W/O Cab) | 2 |
| 01***20 | Screw | 6 |
| 01***16 | Bolt, Mount Solenoid Valve | 6 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Floor (R.H. Console Box)
| 01***16 | Bolt, Mounting Transmission Control Switch | 12 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 4 |
| 09***06 | Cap - Machines Without Rear Wiper | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Floor Guard
| 01***16 | Screw | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Floor Support
| 01***40 | Bolt,(For Slag Handling) (For Usa) | 8 |
| 01***50 | Bolt,(For D60pl) | 4 |
| 01***13 | Nut,(For Adjustable Rod) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Gauge And Sensor (Instrument Panel)
| 01***08 | Screw | 2 |
| 01***16 | Screw,(For Joy Stick Steering) | 5 |
| 01***12 | Screw,(Not Shown) (For Std Cab) | 7 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Hst Control Line
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 04***10 | Clip,(For North America) | 1 |
| 07***11 | O-Ring,(Tm8202-009) | 3 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Loader Control (Lever Mounting Parts And Cable)
| 01***10 | Screw,(With Air Conditioner) | 1 |
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Loader Control (Work Equipment Contorol Lever)
| 01***55 | Bolt | 1 |
| 01***25 | Screw | 1 |
| 01***35 | Bolt, Stopper | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Loader Control (Work Equipment Contorol Lock Lever)
| 41***10 | Lever | 1 |
| 41***60 | Lever | 1 |
| 41***70 | Cap | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Operator'S Seat
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***25 | Bolt - Rear Guard Mounting | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Steering Wheel And Column
| 01***45 | Bolt,(With Water Separator Type) | 4 |
| 01***45 | Bolt,(Noise Abatement Part) | 2 |
| 01***55 | Bolt,(With Joy Stick Steering) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Operatior'S Compartment And Control System : Transmission Control (Forward And Reverse Control Lever)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
| 36***60 | Shift Lever Ass'Y | 1 |
Service Kit And Component Parts
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Service Kit And Component Parts : Dump Cylinder
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Service Kit And Component Parts : Hydraulic Pump (Work Equipment And Steering)
| 01***32 | Washer, (Without Emergency Steering) | 4 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 4 |
| 04***18 | Ring, Retaining | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Service Kit And Component Parts : Lift Cylinder
| 01***29 | Nut - Front Axle Mounting | 1 |
| 07***90 | O-Ring,(Dk029369-0020) (K2) | 1 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Service Kit And Component Parts : Steering Cylinder
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 07***35 | O-Ring, Upper Cooler Inlet And Outlet Ports | 1 |
Transmission
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Drive Shaft (Front)
| 41***20 | Spider Ass'Y | 2 |
| 41***40 | Fitting,Grease | 2 |
| 41***90 | Ring,Snap | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Drive Shaft (Rear)
| 41***20 | Spider Ass'Y | 2 |
| 41***40 | Fitting,Grease | 2 |
| 41***90 | Ring,Snap | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Front Axle (Brake)
| 41***20 | Piston | 2 |
| 41***41 | Disc | 2 |
| 41***50 | Plate | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Front Axle (Differential)
| 01***25 | Screw | 16 |
| 01***25 | Bolt, Mount Cover | 10 |
| 01***35 | Bolt, Mount Carrier | 9 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Front Axle (Final Drive)
| 01***50 | Capscrew - M12 | 2 |
| 04***16 | Pin, Spring | 6 |
| 20***40 | Bearing | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Front Axle (Housing)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 07***30 | Breather | 1 |
| 07***08 | Plug,(D65ex?Px) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Front Axle (Mounting Parts)
| 01***90 | Bolt,(Without Cab) | 24 |
| 01***40 | Bolt | 20 |
| 01***60 | Bolt | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Main Line (Drain And Filter Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***95 | Bolt,(For Shipping) | 2 |
| 01***45 | Bolt,(Noise Abatement Part) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Main Line (Main Line)
| 01***32 | Washer, (Without Emergency Steering) | 16 |
| 07***45 | Bolt, Mount Tube At Transmission | 16 |
| 41***30 | Flange, Split | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Main Line (Oil Cooler Line)
| 01***16 | Bolt - Starting Motor Ground Cable | 7 |
| 04***10 | Ring, Retaining | 1 |
| 04***11 | Clip,(Sand And Dusty Spec.) | 11 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Main Line (Suction Line)
| 01***45 | Bolt, Bracket Mounting | 2 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 2 |
| 07***32 | O-Ring,(See Fig. H0312-01a0-4) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Motor (Hst Motor Mounting Parts)
| 01***55 | Bolt | 4 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
| 07***80 | O-Ring, Front Coupling Cage | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Motor (Inner Parts? 1/2)
| 01***45 | Bolt (Y0320-K3) | 8 |
| 01***00 | Bolt | 4 |
| 02***03 | O-Ring | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Motor (Inner Parts? 2/2)
| (4***0) | Motor Ass'Y,Valiable | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Hst Pump Mounting Parts)
| 01***55 | Capscrew | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 2 |
| 41***00 | Packing | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 1/7)
| 04***10 | Ring,Snap | 1 |
| 41***01 | Pump Ass'Y,Valiable | 1 |
| 41***10 | Valve Ass'Y,Cartridge | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 2/7)
| 02***20 | O-Ring,Barrel | 3 |
| 22***30 | O-Ring | 1 |
| 23***20 | O-Ring | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 3/7)
| 02***09 | O-Ring | 1 |
| 02***29 | O-Ring | 1 |
| 07***34 | O-Ring,(For Front Attachment) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 4/7)
| 01***20 | Screw | 2 |
| 01***50 | Screw | 4 |
| 01***20 | Bolt,See Fig. K4010-65a0 | 8 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 5/7)
| (4***1) | Pump Ass'Y,Valiable | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 6/7)
| (4***1) | Pump Ass'Y,Valiable | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Hst Pump (Inner Parts? 7/7)
| (4***1) | Pump Ass'Y,Valiable | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Parking Brake Control Parts
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***12 | Bolt,(With Speedometer) | 4 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Parking Brake Control Parts (Linkage)
| 01***16 | Bolt - Starting Motor Ground Cable | 5 |
| 01***12 | Washer,(With Body Positioner) | 1 |
| 01***16 | Washer,(With Water Separator) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Rear Axle (Brake)
| 41***20 | Piston | 2 |
| 41***41 | Disc | 2 |
| 41***50 | Plate | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Rear Axle (Differential)
| 01***25 | Screw | 16 |
| 01***25 | Bolt, Mount Cover | 10 |
| 01***35 | Bolt, Mount Carrier | 9 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Rear Axle (Final Drive)
| 01***50 | Capscrew - M12 | 2 |
| 04***16 | Pin, Spring | 6 |
| 20***40 | Bearing | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Rear Axle (Housing)
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Rear Axle (Mounting Parts)
| 01***90 | Bolt,(Without Cab) | 24 |
| 01***40 | Bolt | 20 |
| 01***60 | Flat Washer - M20 (Hardened) | 20 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Transfer (Inner Parts? 1/2)
| 01***20 | Capscrew - M10 | 4 |
| 01***35 | Bolt, Mount Carrier | 15 |
| 01***75 | Bolt | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Transfer (Inner Parts? 2/2)
| 01***35 | Bolt, Mount Carrier | 8 |
| 01***16 | Bolt | 1 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Transmission : Transfer Mounting Parts
| 01***05 | Bolt | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
Wheel Related Parts
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Wheel Related Parts : Tire? 17.5/65-20-12pr-L2
| 09***20 | Cap, Tire Valve | 1 |
| 41***10 | Valve Assembly,Tire | 1 |
| 41***10 | Tire Ass'Y | 4 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Wheel Related Parts : Wheel? 17.5/65-20
Work Equipment
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Work Equipment : Bucket? 1.2m3
| 41***10 | Bucket | 1 |
| 41***10 | Plate (Welded) | 2 |
| 41***70 | Edge (Welded) | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Work Equipment : Dump Cylinder
| 07***00 | Fitting, Grease - Upper Hinge Pin | 1 |
| 41***40 | Seal,Dust? (Cylinder Head) | 4 |
| (7***1) | Cylinder Ass'Y,Bucket | 1 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Work Equipment : Lift Arm And Bellcrank
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 13 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 9 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Work Equipment : Lift Cylinder
| 41***30 | Seal, Dust - End | 4 |
| (7***0) | Cylinder Ass'Y,Lift | 2 |
Komatsu : Wa120-3cs(S/N 10004-Up (For Indonesia)) : Work Equipment : Tooth
| 01***60 | Flat Washer - M20 (Hardened) | 8 |
| 09***65 | Bolt, Plow (Bottom) | 14 |
| 09***16 | Nut | 16 |
WA120-3CS(S/N 10004-UP (FOR INDONESIA)) serial number reference
The PIN plate is located on the front frame, on the right-hand side of the articulation joint. Read the prefix as the first five digits of the serial number stamped on the plate.
| Prefix | Identifies | Notes |
|---|---|---|
| 10004 | WA120-3CS | Serial range 10004-UP (For Indonesia). Tied to WA120-3CS parts catalog and service manual (SEBM012402). No specific engine or generation year identified in sources for this exact prefix range. |
Frequently asked questions
What engine does the WA120-3CS use?
The WA120-3CS is powered by the Komatsu S4D102E-1 diesel engine, producing approximately 84.5 net horsepower.
What is the operating weight of the WA120-3CS?
The operating weight varies by configuration but is approximately 8.2 tons (17,284 lbs) for the standard WA120-3 model.
What model replaced the WA120-3CS?
The WA120-3A, featuring an emission-compliant engine installation, succeeded the WA120-3 series.
What WA120-3CS(S/N 10004-UP (FOR INDONESIA)) owners discuss
What engine powers the Komatsu WA120-3CS (S/N 10004-UP) and what are its key specifications?
The Komatsu WA120-3CS (S/N 10004-UP) is powered by the Komatsu S4D102E-1 diesel engine. This engine is integrated into the machine's design to provide power for the four-speed transmission and hydraulic systems. The WA120-3 series generally falls into the 100-250 HP class, with specific net horsepower ratings varying by configuration and serial range within the WA120-3 family. The WA120-3CS shares the base WA120-3 powertrain architecture, though exact net horsepower figures vary by configuration/series depending on the specific emissions or regional package installed at the factory. The engine is designed for fuel efficiency and reliability in loading applications such as sand, gravel, and dirt handling.
How does the hydraulic system behave, particularly regarding the main control valve and priority circuits?
The WA120-3CS utilizes a tandem circuit with a bucket priority circuit in its main control valve. When the bucket spool is operated, the boom is not actuated even if the boom spool is operated, ensuring bucket priority. Two safety valves with suction are installed to protect the circuit from abnormal pressure and to compensate for oil lack. Common hydraulic issues reported in the Komatsu WA120-3 series include slow movements when hot due to internal leakage in the pump, main control valve, or cylinders as viscosity decreases. If all hydraulic functions become slow, check the hydraulic oil level, correct hydraulic oil specification (Komatsu HO or equivalent), hydraulic filters, and engine RPM. If only one function is slow, investigate the specific cylinder, control valve spool, or hose restriction.
What are the typical undercarriage and wear patterns for this wheel loader?
As a wheel loader, the WA120-3CS relies on tires rather than a tracked undercarriage. Common wear patterns include tire wear, which is influenced by the machine's operating weight and ground pressure. The WA120-3 series has an operating weight class that varies by configuration, typically ranging around 17,000-18,000 lb (approx. 8.2 tons) for the WA120-3 active variant. Wear on the bucket teeth, cutting edges, and pivot pins is common due to the high breakout force of 13,490 lb (60.01 kN). Operators should monitor the condition of the bucket width (7.85 ft / 2390 mm) and capacity (1.6-1.9 cu yd / 1.2-1.4 m3) for excessive wear. The transmission vent and hydraulic lines are also prone to leakage if seals degrade, as noted in user reports of oil pouring from the trans vent or engine dipstick when systems are over-pressurized or clogged.
What are the common electrical or sensor issues for the WA120-3 series?
Komatsu machines of this era rely on electronic control systems that monitor pressure sensors, valves, circuits, and electronic controllers. Common electrical issues include intermittent starting, dashboard failure, or random shutdowns triggered by faulty sensors or unstable power supplies. The Electronic Control Module (ECM) may trigger fault codes for failures in the engine controller, fuel injection sensors, or hydraulic actuators. Owners should check battery state of charge, battery terminals, engine and chassis grounds, and the main starter cable if the engine will not start. Multiple fault codes often indicate issues with the battery, grounds, or connectors. Ensure all electrical connections are clean and tight to prevent erratic behavior.
What are the recommended fluid specifications for the Komatsu WA120-3CS?
Use Komatsu Genuine Lubricants or equivalents meeting Komatsu Engineering Standards. For the engine, use diesel engine oil meeting API CD or higher specifications. For the hydraulic system, use hydraulic oil meeting ISO VG46 or Komatsu HO specification. For the powertrain (transmission), use powertrain oil meeting Komatsu TO specification (e.g., TO10 or TO30 depending on temperature). For the axles, use axle oil meeting Komatsu AXO80 specification (SAE 80WZF). For the cooling system, use Super-coolant AF-NAC. Always verify the exact fluid requirements in the operation and maintenance manual for the specific serial range, as formulations may vary by configuration/series.
What are the key dimensions and capacities for the WA120-3CS?
The Komatsu WA120-3CS shares dimensions with the WA120-3 series. Key specifications include a bucket dump clearance at max raise of 8.83 ft (2690 mm). The bucket capacity ranges from 1.6 to 1.9 cu yd (1.2-1.4 m3) heaped, with a struck capacity of 1.57 cu yd (1.2 m3). The bucket width is 7.85 ft (2390 mm). The machine has a ground clearance of 1.28 m (approx. 4.2 ft). Transport dimensions vary by configuration, with the WA120-3 active variant having a transport length of 6.02 m and a transport width of 2.39 m. The operating weight is approximately 8.2 tons (17,284 lb) for the active variant, but varies by configuration/series depending on the attachment package and regional specifications.
What should be checked when buying a used WA120-3CS (S/N 10004-UP)?
When inspecting a used WA120-3CS, verify the serial number starts with 10004 or higher to confirm it falls within the WA120-3CS range. Check for signs of hydraulic system leakage, particularly around the main control valve, cylinder seals, and transmission vent. Ensure the engine starts cold and hot without excessive smoke or loss of power. Test all hydraulic functions for speed and strength, noting any sluggishness when hot which may indicate pump or valve wear. Inspect the tires for wear and damage. Check the electrical system for intermittent faults, dashboard warnings, and proper operation of safety interlocks. Verify the condition of the cooling package, including the radiator, hydraulic oil cooler, and charge-air cooler, for debris or leaks. Have your dealer verify the exact engine model and transmission configuration against the serial number, as variations exist within the WA120-3 family.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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