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Komatsu JV25DW-2(S/N 1201-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu JV25DW-2 is a smooth drum roller in the compaction equipment class, designed for soil and asphalt compaction. It is part of the JV25 series, which includes variants like the JV25CR-7 and JV25CW-2. The machine operates in the compact to mid-size weight range, typically around 2.5 to 3 tons. Production years for the JV25DW-2 span from the mid-2000s to the early 2010s. It succeeded earlier JV series models and was eventually replaced by newer generations of compact rollers. Configurations offered include smooth drum variants for different soil types and operating weights.
Across the JV25 series generations, changes included updates to engine emissions compliance, hydraulic system efficiency, and operator cab ergonomics. The JV25DW-2 is significant in the used and parts market because it is a high-volume machine in municipal and utility applications. Its widespread use ensures a robust supply of aftermarket parts and a large pool of used units. The machine's compact size and versatility make it a staple for small-scale projects, driving consistent demand for maintenance and replacement components.
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 JV25DW-2(S/N 1201-UP) specifications
Engine
| Engine Model | 3D84E |
| Number of Cylinders | 3 |
| Displacement | 91.3 cu in (1,496 cc) |
| Gross Power | 25.4 hp (18.9 kW) @ 2,300 rpm |
Weights
| Operating Weight | 5,643.9 lb (2,559 kg) |
Dimensions
| Overall Length | 8.62 ft (2.63 m) |
| Height to Top of Cab | 5.25 ft (1.60 m) |
| Wheelbase | 6.4 ft (1.95 m) |
| Ground Clearance | 7.68 in (195 mm) |
| Drum Diameter | 26.6 in (675 mm) |
| Drum Width | 47.3 in (1,200 mm) |
Performance
| Max Speed | 6.3 mph (10.1 km/h) |
| Vibration Frequency | 55 Hz |
| Centrifugal Force (Medium) | 4,630 lb (20.6 kN) |
Service capacities (summary)
| Fuel Capacity | 9.6 gal (36.3 L) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu JV25DW-2(S/N 1201-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the JV25DW-2(S/N 1201-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Use KOWA oil analysis at every 500-hour interval to monitor engine wear metals and hydraulic contamination. Check coolant SCA levels at 500 hours to prevent corrosion in the engine block. Monitor hydraulic oil particle count during 1000-hour sampling to detect pump or valve wear early. Track fuel dilution in engine oil samples to identify injector or piston ring issues. Analyze final drive oil for gear wear metals to predict transmission failure. Use KOMTRAX telematics to track load frequency and fault codes for proactive service scheduling.
Corrective & Common Repairs
Address hydraulic hose leaks promptly to prevent contamination of the swing bearing and final drives. Replace worn track pads and tensioners to maintain proper drum traction and reduce undercarriage stress. Repair or replace faulty fuel injectors if dark exhaust smoke or power loss occurs. Fix hydraulic pump seals to maintain pressure and prevent fluid loss. Replace worn swing bearing grease seals to keep contaminants out of the slew ring. Inspect and replace cracked engine mounts to reduce vibration and cab fatigue.
Overhaul & Rebuild Points
Plan engine overhaul around 10,000 hours, focusing on piston rings, valves, and turbocharger inspection. Rebuild the main hydraulic pump at 8,000 to 10,000 hours if flow or pressure drops below spec. Overhaul final drives at 10,000 hours if oil analysis shows high gear wear metals or if leakage occurs. Rebuild swing motor and bearing assembly at 12,000 hours to restore slew precision and prevent structural damage. Inspect boom and stick welds at 15,000 hours for fatigue cracks. Replace all hydraulic cylinder seals during mid-life service to prevent external leaks.
Seasonal & Environment Servicing
Use low-viscosity engine oil and hydraulic fluid in cold climates to ensure easy starting and proper circulation. Check battery health frequently in winter as cold temperatures reduce cranking power. Drain water from the fuel separator daily in humid or cold conditions to prevent fuel line freezing. Inspect radiator and oil cooler fins for debris buildup in dusty environments to prevent overheating. Use high-temperature grease in hot climates to prevent washout from the swing bearing and final drives. Check coolant concentration before summer to ensure adequate boiling point protection.
JV25DW-2(S/N 1201-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129100-55650 | Element,Fuel Filter | Fuel system service | Check fitment → |
| YM129052-55620 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| YM121120-12900 | Element | Scheduled service item | Check fitment → |
| 258-81-25400 | Filter Ass'Y | Scheduled service item | Check fitment → |
| 01220-40820 | Screw, Filter Mounting | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
JV25DW-2(S/N 1201-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure; engine control drive system circuit malfunction. | Faulty ECM power connections, blown fuses, or damaged ground wires. | Inspect ECM power connections, fuses, and ground wires. |
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure. | Broken speed sensor, wiring issue, or connector corrosion. | Replace the speed sensor and verify voltage at the pin connector. |
| CA441 | Battery voltage too low. | Weak battery, failing alternator, or loose connections. | Check battery health and alternator output; replace if necessary. |
| AA10NX | Air cleaner clogging. | Dirty or blocked air filter element. | Replace the air filter element. |
| B@BCNS | Engine coolant overheating. | Low coolant level, blocked radiator fins, or fan belt failure. | Check coolant level, inspect radiator fins, and verify fan belt condition. |
| B@HANS | Hydraulic oil overheating. | Contaminated hydraulic oil, clogged filter, or cooler fan malfunction. | Change hydraulic filter and oil; check cooler fan operation. |
| CA122 | Intake air pressure sensor feedback voltage too high. | Faulty intake pressure sensor or wiring short. | Verify the intake pressure sensor and wiring integrity. |
| CA451 | Common rail pressure sensor feedback value too high. | Malfunctioning rail sensor or actual overpressure condition. | Diagnose the fuel rail pressure sensor or check pump lines. |
| DGH2KB | Hydraulic oil temperature sensor short circuit. | Shorted temperature sensor or damaged harness. | Replace the temperature sensor. |
| DW43KB | Travel speed solenoid valve short circuit. | Electrical short in the travel speed control solenoid. | Replace the solenoid valve. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
JV25DW-2(S/N 1201-UP) attachments & work tools
Compaction Drums
The JV25DW-2 is a smooth drum roller; the primary work tool is the single smooth steel drum for soil and asphalt compaction. Factory configurations include the drum itself with associated vibration mechanisms, as no external quick-attach system is standard for the drum on this model.
Ride-Down/Finish Drums
Optional ride-down or finish drums may be specified for final surface smoothing. These are mounted in place of or in conjunction with the main drum depending on the specific factory build configuration for the JV25DW-2 serial range.
Hydraulic Couplers
Not applicable. The JV25DW-2 is a roller, not an excavator or skid steer, and does not utilize quick-attach couplers for work tools. Hydraulic connections are internal to the compaction system.
Guarding/Protection
Factory options include operator guarding such as ROPS/FOPS cabs or canopies, and drum guards or skid shoes to protect the drum and undercarriage during operation on rough terrain. Specific guarding varies by configuration and regional safety standards.
All JV25DW-2(S/N 1201-UP) assemblies by section
Every catalogued assembly group for the Komatsu JV25DW-2(S/N 1201-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
3d84e-3e Engine S/N 03098-Up
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Air Cleaner And Mounting
| YM***60 | Bolt,Wing | 1 |
| YM***70 | Seat,Rubber | 2 |
| YM***03 | Seal,Seal | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Air Intake Manifold And Connection
| YM***01 | Heater,Intake Air | 1 |
| YM***00 | Manifold,Air Intake | 1 |
| YM***52 | Screw | 4 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Alternator (40a)
| YM***50 | Brush Ass'Y | 1 |
| YM***00 | Retainer,Bearing | 1 |
| YM***70 | Diode Ass'Y | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Alternator And Mounting (40a)
| YM***30 | Plate,Adjust | 1 |
| YM***02 | Nut | 1 |
| YM***50 | Bolt | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Camshaft And Tappet
| YM***80 | Camshaft Ass'Y | 1 |
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Crankshaft
| YM***00 | Gear,Crank | 1 |
| YM***80 | Parallel Pin | 1 |
| YM***10 | Spring Pin | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Cylinder Block
| YM***00 | O-Ring (Kit) | 1 |
| YM***00 | Gauge,Oil Level | 1 |
| YM***60 | Cylinder Block, Assembly | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Cylinder Head
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***80 | Retainer, Spring | 6 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Cylinder Head Cover
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***00 | Clip,Breather Hose | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Engine Stop Motor And Mounting
| YM***80 | Ring,Snap | 1 |
| YM***00 | Pin,Cotter | 1 |
| YM***90 | Washer | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Exhaust Manifold And Muffler
| YM***10 | Manifold, Exhaust | 1 |
| YM***60 | Support,R.H | 1 |
| YM***01 | Gasket (Kit) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Flywheel And Flywheel Housing
| YM***00 | Gear,Ring | 1 |
| YM***02 | Screw | 6 |
| YM***80 | Parallel Pin | 4 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Front Cover And Gear
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***52 | Bolt | 4 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Filter And Piping
| YM***70 | Union | 1 |
| YM***00 | Hose | 2 |
| YM***00 | O-Ring (Kit) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Injection Pump (Governor) (1/2)
| YM***00 | Spring, Regulator | 1 |
| YM***50 | Screw | 1 |
| YM***02 | Lever Ass'Y,Stop | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Injection Pump (Governor) (2/2)
| YM***01 | Weight Assembly., Governor | 1 |
| YM***90 | Shaft,Governor Lever | 1 |
| YM***16 | Pin,Spring | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Injection Pump (Pump) (1/2)
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
| YM***50 | Cover,Side | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Injection Pump (Pump) (2/2)
| YM***70 | Retainer, Spring | 3 |
| YM***02 | Screw | 2 |
| YM***00 | Valve,Delivery | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Injection Pump And Piping
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***02 | Nut | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Fuel Nozzle And Spill Pipe
| YM***20 | Spring | 1 |
| YM***00 | Fuel Injection Nozzle, Assembly | 1 |
| YM***80 | Pipe | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Gasket Kit
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***31 | Gasket,Head (Kit) | 1 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Lubricating Oil Filter And Mounting
| YM***50 | Nut | 1 |
| YM***00 | Valve,Relief | 1 |
| YM***02 | Bolt Plated | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Lubricating Oil Pump And Suction Pipe
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***41 | Gasket (Kit) | 1 |
| YM***20 | Bolt,Joint (Cylinder Head Side) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Oil Pan
| YM***40 | Oil Pan Ass'Y | 1 |
| YM***52 | Screw | 2 |
| YM***52 | Screw | 20 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : P.P.C. Pump And Mounting
| YM***64 | Bearing,Ball | 2 |
| YM***50 | Bracket | 1 |
| YM***02 | Stud | 4 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Piston And Connecting Rod
| YM***00 | Screw | 2 |
| YM***00 | Crank Pin Metal A. (Std) | 1 |
| YM***00 | Piston Ass'Y | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Ribbon Heater Timer And Safety Relay
| YM***00 | Relay, Safety | 1 |
| YM***20 | Timer,Ribbon Heater | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Rocker Arm
| YM***02 | Screw | 6 |
| YM***80 | Spring | 3 |
| YM***50 | Rocker Arm Ass'Y | 6 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Starting Motor
| YM***10 | Pinion Clutch Ass'Y | 1 |
| YM***20 | Housing,Center | 1 |
| YM***40 | Field Coil Ass'Y | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Starting Motor And Mounting
| YM***52 | Bolt Plated | 2 |
| (Y***0) | Starting Motor Ass'Y,(See Fig.0661) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Tool
| YM***70 | Wrench | 1 |
| YM***20 | Wrench | 1 |
| YM***50 | Screw Driver | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : 3d84e-3e Engine S/N 03098-Up : Water Pump And Cooling Fan
| YM***41 | Fan,Cooling? (Stamp Mark Jt) | 1 |
| YM***02 | Bolt Plated | 2 |
| YM***60 | Spacer | 1 |
Control System
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Brake Pedal And Linkage
| 01***16 | Bolt,(For Slag Handling) | 5 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Forward And Reverse Control Lever
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 11 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Fuel Control Lever
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***50 | Capscrew | 1 |
| 01***30 | Bolt | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Cylinder
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***60 | O-Ring,(F4350-59a0 -6 ) | 1 |
| 07***26 | Nut, Nylon | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Cylinder Mounting Parts
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 04***18 | Ring, Snap | 4 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Piping (1/5) (Suction Line)
| 01***20 | Bolt (Itl) | 3 |
| 01***19 | Washer,(Not Used With Ventilator) | 3 |
| 07***23 | Clamp | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Piping (2/5) (Delivery Line)
| 01***20 | Bolt (Itl) | 3 |
| 01***19 | Washer,(Not Used With Ventilator) | 3 |
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Piping (3/5) (Bypass Filter Line)
| 01***60 | Bolt | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Piping (4/5) (Steering Valve Line)
| 25***23 | Elbow | 1 |
| 25***23 | Elbow | 2 |
| 25***23 | Adapter | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Piping (5/5) (Steering Cylinder Line)
| 25***23 | Elbow | 1 |
| 25***13 | Elbow | 2 |
| 25***23 | Adapter | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Valve
| 25***01 | Control Ass'Y | 1 |
| 25***10 | Spring | 1 |
| 25***00 | Plug Ass'Y | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Control System : Steering Wheel
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
| 01***11 | Nut - Mounting | 1 |
Engine Related Parts And Electrical System
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Electrical System (1/2) (Front Frame Line)
| 01***12 | Bolt - Front Cover Mounting | 3 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Electrical System (2/2) (Rear Frame Line)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 01***16 | Screw, Mount Parking Lights | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Engine And Pump Mounting Parts(#1201-1231)
| 01***20 | Bolt,(For Mono Lever Steering) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Engine And Pump Mounting Parts(#1232-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Exhaust Related Parts
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***85 | Bolt,Spring | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Fuel Tank(#1201-1231)
| 01***14 | Screw | 5 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 5 |
| 25***40 | Nipple | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Fuel Tank(#1232-)
| 01***14 | Screw | 5 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 5 |
| 07***37 | Clamp | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Engine Related Parts And Electrical System : Radiator And Mounting Parts
| 01***12 | Bolt - M8 - 1.25 X 12 | 6 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
Guard
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Center Pin
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***13 | Nut,(For Adjustable Rod) | 8 |
| 01***14 | Nut (Itl) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Dashboard And Cover
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 10 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Front Frame And Cover (1/2)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 12 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Front Frame And Cover (2/2)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Operator'S Seat
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 8 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Guard : Rear Frame And Cover
| 01***12 | Bolt,(With Cylinder Cover) | 6 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 14 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
Mark Plate And Tool
Komatsu : Jv25dw-2(S/N 1201-Up) : Mark Plate And Tool : Marks And Plates (English)(#1232-)
| 09***21 | Plate? Caution,Fuel Inlet | 1 |
| 09***10 | Plate? Safety,Hydraulic Tank Cap | 1 |
| 09***01 | Plate? Caution,Radiator | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Mark Plate And Tool : Tool
| 07***00 | Pump,Grease | 1 |
| 07***04 | Cartridge,Grease | 1 |
| 07***00 | Nozzle,(For Rubber Shoe) | 1 |
Track
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Front Roller
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 40 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Front Scraper (1/2) (Front)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 7 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Front Scraper (2/2) (Rear)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 7 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Rear Roller
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 40 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Rear Scraper (1/2) (Front)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 7 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Track : Rear Scraper (2/2) (Rear)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 7 |
Work Equipment Control System
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (1/6) (Pump)
| 01***75 | Bolt | 6 |
| 01***25 | Bolt | 4 |
| 07***09 | O-Ring,(F4350-61a0 -33 ) | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (2/6) (Shaft Ass'Y)
| 26***00 | Shaft Ass'Y | 1 |
| 26***10 | Shaft | 1 |
| 26***20 | Shim | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (3/6) (Rotary Ass'Y)
| 26***00 | Rotary Ass'Y | 1 |
| 26***10 | Piston | 9 |
| 26***20 | Block | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (4/6) (Hanger Ass'Y)
| 01***16 | Bolt (Op) | 4 |
| 26***00 | Hanger Ass'Y | 1 |
| 26***10 | Hanger | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (5/6) (Cover Ass'Y)
| 01***35 | Bolt | 4 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***07 | O-Ring - (K10) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hst Pump (6/6) (Control Cylinder)
| 01***32 | Bolt | 4 |
| 01***40 | Bolt | 1 |
| 01***50 | Bolt | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Htdraulic Tank
| 01***16 | Bolt - Seat And Tether Belt Mounting | 10 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 10 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Bypass Valve Line)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Hst Pump Line)
| 25***14 | Elbow | 3 |
| 25***24 | Elbow | 2 |
| 25***14 | Elbow | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Neutral Valve Line)
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***90 | Bolt,With Cover | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 5 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Oil Cooler Line)
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Rear Drive Motor Line)
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 6 |
| 01***16 | Washer,(For 35a Alternator) | 6 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line)
| 25***14 | Elbow | 4 |
| 25***12 | Elbow | 1 |
| 25***22 | Elbow | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Vibration Motor Line) (Front)
| 25***32 | Hose | 1 |
| 25***12 | Elbow | 2 |
| 25***13 | Elbow | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Vibration Motor Line) (Rear)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
| 25***12 | Elbow | 1 |
| 25***13 | Elbow | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Hydraulic Piping (Vibration Valve Line)
| 01***90 | Bolt,With Cover | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Travel Motor
| 25***10 | Plate,Friction | 6 |
| 25***21 | Plate,Separate | 7 |
| 26***00 | Motor,Travel | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Filter
| 27***00 | Filter Ass'Y,Water | 1 |
| 27***20 | Case | 1 |
| 27***80 | O-Ring | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (1/3) (Suction And Filter Line)(#1201-1231)
| 01***12 | Bolt - M8 - 1.25 X 12 | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (1/3) (Suction And Filter Line)(#1232-)
| 01***12 | Bolt - M8 - 1.25 X 12 | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (2/3) (Front Nozzle Line)(#1201-1231)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (2/3) (Front Nozzle Line)(#1232-)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (3/3) (Rear Nozzle Line)(#1201-1231)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Piping (3/3) (Rear Nozzle Line)(#1232-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Pump
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 25***00 | Pump Ass'Y,Water | 1 |
| 25***70 | Casing | 1 |
Komatsu : Jv25dw-2(S/N 1201-Up) : Work Equipment Control System : Water Tank
| 01***16 | Bolt - Box Mounting | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***20 | Bolt | 12 |
JV25DW-2(S/N 1201-UP) serial number reference
The PIN plate is located on the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. Read the 17-character ISO PIN stamped on the emissions/export plate; the first three characters (KMT) identify the manufacturer, while positions 4–8 encode the model family and configuration.
| Prefix | Identifies | Notes |
|---|---|---|
| JV25DW-2 | Smooth Drum Roller | S/N 1201-UP. Dash-2 generation. Confirmed by parts catalog listings for this specific serial range. |
Frequently asked questions
What engine does the Komatsu JV25DW-2 use?
The Komatsu JV25DW-2 uses a Komatsu industrial diesel engine, typically a 2-cylinder model specific to the JV25 series. Exact engine code varies by production year and regional emissions tier.
What is the operating weight of the Komatsu JV25DW-2?
The operating weight of the Komatsu JV25DW-2 varies by configuration and counterweight setup, typically ranging from 2,500 kg to 3,000 kg (5,511 lb to 6,614 lb).
What model replaced the Komatsu JV25DW-2?
The Komatsu JV25DW-2 was succeeded by newer generations of compact smooth drum rollers, such as the RV series. Specific replacement models depend on the region and production year.
What JV25DW-2(S/N 1201-UP) owners discuss
What engine powers the Komatsu JV25DW-2 (S/N 1201-UP)?
The Komatsu JV25DW-2 is powered by a Komatsu industrial engine. Specific cylinder count and displacement details are not documented in the provided source text for this exact serial range. Verify with your dealer for the specific engine model and emissions tier applicable to your unit's manufacture date.
What are the common hydraulic behaviors and failure modes for Komatsu excavators that may apply to this series?
Common hydraulic issues include slow operation when hot due to internal leakage in pumps or valves, and weak working device performance caused by PC valve misadjustment, LS valve failure, or plunger pump servo piston issues. If all functions are slow, check hydraulic oil level, filter condition, and engine RPM. If only one function is slow, inspect the specific cylinder, control valve spool, and load-holding valves.
What undercarriage and wear patterns are typical for Komatsu compact equipment?
Undercarriage components such as track pads, bushings, and bearings are subject to significant wear. Worn bushings can lead to noise and vibration, while worn bearings may cause premature track failure. Track tension should be monitored regularly; repeated loosening often indicates adjuster or component wear. Debris packed into the undercarriage can also cause uneven wear and pulling to one side.
What are common engine quirks or power loss causes for Komatsu industrial engines?
Engine power loss under load is often caused by restricted airflow (dirty air filter, clogged charge-air hoses) or fuel delivery issues (clogged fuel filters, water in fuel, venting problems). Overheating may result from debris packed between heat exchangers (radiator, hydraulic oil cooler, charge-air cooler). Oil burning can be caused by dirty air filters, gas channeling, or use of non-standard oil.
What electrical or sensor issues are commonly reported for Komatsu machines?
Komatsu machines rely heavily on electronic control systems. Common issues include intermittent starting, dashboard failures, and random shutdowns triggered by faulty sensors or unstable power supplies. Multiple fault codes may indicate battery issues, poor grounds, or connector problems. Always check power supply and sensor functionality before replacing control panels.
What should be checked when buying a used Komatsu JV25DW-2 (S/N 1201-UP)?
Verify the exact serial-prefix specification sheet and installed attachment package, as these affect weight, reach, and fuel use. Check for signs of hydraulic system degradation (slow operation when hot, leaks), engine cooling system blockages, and undercarriage wear (bushings, bearings, track tension). Inspect for corrosion, especially in harsh environments, and ensure all electronic sensors and control panels are functioning without intermittent faults. Confirm maintenance history for hydraulic oil and filter changes.
What safety-critical fixes require dealer verification?
Safety-critical systems such as the swing brake, travel motor safety valves, and main overflow valve adjustments must be verified by a dealer. Incorrect adjustment of the main safety valve can compromise the entire hydraulic system's smooth operation and safety. Always consult the official Komatsu shop manual for this range and have your dealer verify final values against OEM literature before purchase or operation.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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