Komatsuwheel loadersmall ( - wa120 / sk*)
Komatsu WB91R-2(S/N 91F20127-Up)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu WB91R-2 is a compact backhoe loader designed for utility, municipal, and general construction work. It is powered by a Komatsu 4D106-1FA naturally aspirated diesel engine producing 67.7 kW (90.8 HP) gross and 61.5 kW (82.5 HP) net. The machine features a full powershift transmission with electronic gear management and four-wheel drive. Operating weight ranges from 7.5 to 8.58 metric tons (16,530 lbs) depending on configuration. Production years for this series span the mid-2000s to early 2010s. The WB91R-2 succeeded the WB91R-1 and was eventually replaced by the WB91R-5. Configurations offered include standard cab, canopy options, and various front bucket and backhoe attachment packages.
Across the WB91R series, Komatsu refined the hydraulic system efficiency and emissions compliance, moving from earlier Tier 2/3 standards to Tier 4 Final/Stage V requirements in later generations. The WB91R-2 matters in the used and parts market because its 4D106-1FA engine is robust and widely supported, and its compact size allows it to fit in tight urban spaces where larger loaders cannot operate. The transition to the WB91R-5 introduced significant emissions upgrades and electronic control changes, making the WB91R-2 a preferred choice for operators seeking reliable, simpler mechanical systems with lower maintenance complexity in the secondary market.
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 WB91R-2(S/N 91F20127-Up) specifications
Engine
| Model | 4D106-1FA |
| Gross Power | 90.8 hp (67.7 kW) |
| Net Power | 82.5 hp (61.5 kW) |
| Displacement | 269.3 cu in (4413.0 cc) |
| Cylinders | 4 |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | 16530 lbs (7497.9 kg) |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | 19.35 ft (5.90 m) |
| Transport Width | 7.62 ft (2.32 m) |
| Transport Height | 12.01 ft (3.66 m) |
| Wheelbase | 7.14 ft (2.17 m) |
| Ground Clearance | 1.42 ft (0.43 m) |
| Turning Radius | 17.9 ft (5.46 m) |
Performance
| Travel Speed (Forward) | 24.9 mph (40.1 km/h) |
| Travel Speed (Reverse) | 24.9 mph (40.1 km/h) |
| Lift Capacity at Full Height | 9300 lbs (4218.4 kg) |
| Bucket Dig Force | 7870 lbs (3569.8 kg) |
| Bucket Breakout Force | 13405 lbs (6080.6 kg) |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Tank | 34.4 gal (130.2 l) |
| Hydraulic System | 24.4 gal (92.4 l) |
| Engine Oil | 2.3 gal (8.7 l) |
| Cooling System | 4.8 gal (18.2 l) |
| Transmission Oil | 4.3 gal (16.3 l) |
| Front Axle Oil | 2.2 gal (8.3 l) |
| Rear Axle Oil | 4.9 gal (18.5 l) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
WB91R-2(S/N 91F20127-Up) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 8.7 l (2.3 gal) | Komatsu EO (API CD); SAE 10W or 20W below -20°C; SAE 30 or 40 above -20°C |
| Cooling system | 18.2 l (4.8 gal) | Super-coolant AF-NAC |
| Fuel tank | 130.2 l (34.4 gal) | ASTM D975 No. 2 diesel (ambient > -10°C); ASTM D975 No. 1 diesel (ambient < -10°C) |
| Transmission | 16.3 l (4.3 gal) | Komatsu TO |
| Hydraulic system and tank | 92.4 l (24.4 gal) | Komatsu HO (API CD); SAE 10W-30; HEES synthetic biodegradable oil authorized |
| Front axle | 8.3 l (2.2 gal) | Komatsu AXO |
| Rear axle | 18.5 l (4.9 gal) | Komatsu AXO |
| Grease | N/A | Komatsu Utility genuine grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu WB91R-2(S/N 91F20127-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 WB91R-2(S/N 91F20127-Up) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor engine wear metals and hydraulic contamination. Check the hydraulic transmission oil temperature during operation; top up to the MAX mark when the oil reaches approximately 50°C (122°F). Monitor the air filter restriction indicator daily; replace the outer element at 1,000 hours or when clogged. Test the coolant SCA concentration at 500 hours to prevent cavitation in the 4D106-1FA engine block. Inspect the battery electrolyte levels and terminal tightness regularly to ensure reliable starting in cold conditions.
Corrective & Common Repairs
Address hydraulic leaks at the variable displacement axial piston pump seals and hose connections. Replace the hydraulic return filter if flow restriction causes slow loader cycle times. Inspect the full powershift transmission for slippage; adjust the gear engagement pressure if shifting becomes harsh. Check the front and rear axle final reduction gear oil levels monthly; low levels indicate seal failure. Replace worn steering cylinder seals to restore articulation precision. Inspect the wet disc brake system for pad wear and replace if thickness falls below specification.
Overhaul & Rebuild Points
Overhaul the 4D106-1FA engine valve train at 1,000 hours or when compression drops; use special tools for precise clearance adjustment. Rebuild the hydraulic transmission pump if pressure relief valve settings cannot be maintained at 186.2 bar (2,700 psi). Inspect the front and rear axle differentials for gear wear; replace oil seals and bearings if metal particles are found in the drained oil. Check the loader linkage pivot pins and bushings for elongation; replace if play exceeds limits to maintain bucket breakout force. Inspect the turbocharger shaft play and replace if excessive vibration is detected.
Seasonal & Environment Servicing
In cold seasons, use low-temperature fuel and check the coolant freeze protection level before winter. Drain the fuel water separator daily to prevent injector damage from ice. In warm seasons, clean debris from the radiator and oil cooler fins to prevent overheating. Check the hydraulic oil viscosity; use HEES synthetic biodegradable oil in environmentally sensitive areas. Inspect the cab ventilation and air conditioning filters for dust buildup. Grease all loader and backhoe pivot points more frequently in dusty conditions to prevent abrasive wear.
WB91R-2(S/N 91F20127-Up) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 312613070 | Oil Filter Fastener | Lubrication service | Check fitment → |
| YM119593-03100 | Filter Breather | Scheduled service item | Check fitment → |
| 312607632 | Filter Support | Scheduled service item | Check fitment → |
| 848200022 | Filter | Scheduled service item | Check fitment → |
| 312649057 | Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
WB91R-2(S/N 91F20127-Up) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA441 | Battery voltage too low | Weak battery or charging system failure | Replace the battery or alternator and check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator | Replace the alternator or battery and check the voltage regulator |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Low coolant, blocked radiator, or fan belt failure | Check radiator fins, fan belt, and coolant level |
| B@HANS | Hydraulic oil overheating | Contaminated oil, clogged filter, or cooler fan issue | Change hydraulic filter and oil and check the cooler fan |
| CA122 | Intake air pressure sensor high voltage | Sensor malfunction or wiring short | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure sensor low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA153 | Intake air temperature sensor high voltage | Sensor malfunction or wiring issue | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor low voltage | Sensor malfunction or wiring issue | Replace or test the IAT sensor |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
WB91R-2(S/N 91F20127-Up) attachments & work tools
Front Loader Buckets
Standard capacity is 1.03 m³ (1.35 cu yds) with a width of 231.9 cm (91.3 in). The machine provides a loader bucket breakout force of 13,405.4 lbs (6,080.6 kg) and a lift capacity of 4,218.4 kg (9,300 lbs). Bucket configurations vary by application and regional specification.
Quick Couplers
The machine supports front equipment quick coupling devices for rapid tool changes. Rear equipment rapid coupling devices are also available for backhoe attachment interchangeability. Specific mounting interfaces depend on the serial number break and regional option packages.
Specialty Front Attachments
Factory-authorized options include 4-in-1 buckets and pallet forks. These tools require specific hydraulic arrangements and may utilize unidirectional oil flow configurations. Guarding and mounting hardware are model-specific to the WB91R-2 chassis.
Backhoe Attachments
The standard backhoe bucket has a capacity of 0.20 m³ (SAE) with a dig depth of 457.2 cm (180 in). Optional telescopic arms are available to extend reach to 548.6 cm (216 in). Dig force is rated at 3,569.8 kg (7,870 lbs).
Hydraulic Demolition Tools
Arrangements for installing demolition hammers and manual hydraulic hammers are documented in the service manual. These installations require specific hydraulic circuit modifications and safety valve adjustments. Load stabilizer systems may be included to manage tool vibration.
Offset and Clamshell Options
Offset devices are available for the backhoe to improve trenching precision in confined spaces. Clamshell bucket installation arrangements are also supported. These options require specific hydraulic flow and pressure settings verified by the dealer.
All WB91R-2(S/N 91F20127-Up) assemblies by section
Every catalogued assembly group for the Komatsu WB91R-2(S/N 91F20127-Up). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Levers
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Levers - Komatsu Layout Control (1/2)
| 31***04 | Spacer | 4 |
| 31***13 | Connection R.H | 1 |
| 31***13 | Lever | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Levers - Komatsu Layout Control (2/2)
| 31***04 | Spacer | 4 |
| 31***12 | Connection L.H | 1 |
| 31***13 | Lever | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Pedal (Left Side)
| 31***63 | Pedal Support | 1 |
| 31***21 | Pedal | 1 |
| 31***30 | Bushing, Pedal | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Pedal (Left Side) - Komatsu Layout Control
| 31***21 | Pedal | 1 |
| 31***30 | Bushing, Pedal | 1 |
| 31***57 | Pedal Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Pedal (Right Side)
| 31***63 | Pedal Support | 1 |
| 31***20 | Pedal | 1 |
| 31***30 | Bushing, Pedal | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Backhoe Control Pedal (Right Side) - Komatsu Layout Control
| 31***20 | Pedal | 1 |
| 31***30 | Bushing, Pedal | 1 |
| 31***57 | Pedal Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Braking Control Pedal
| 31***72 | Brake Pedal L.H | 1 |
| 31***73 | Brake Pedal R.H | 1 |
| 31***74 | Pin Drag Pedals | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Fuel Control Lever
| 31***90 | Assembly, Cable | 1 |
| 31***36 | Accelerator Lever | 1 |
| 31***55 | Command Boot | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Fuel Control Pedal
| 31***81 | Support | 1 |
| 31***83 | Accelerator Lever | 1 |
| 31***84 | Lever For Cable | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Outrigger Control Lever
| 31***48 | Command Boot | 2 |
| 31***57 | Clamping Plate, R.H | 1 |
| 31***58 | Clamping Plate, L.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Shovel Control Lever
| 31***04 | Spacer | 4 |
| 31***21 | Pressure -Boot (Only For Germany) | 1 |
| 31***86 | Knob | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Shovel Control Lever (Bucket 4/1)
| 31***04 | Spacer | 4 |
| 31***21 | Pressure -Boot (Only For Germany) | 1 |
| 31***86 | Knob | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Control System : Transmission Lever Control
| 31***52 | Lever | 1 |
| 80***74 | Bolt | 1 |
| 80***03 | Washer | 1 |
Engine
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Camshaft & Driving Gear
| YM***50 | Bearing, Thrust | 1 |
| YM***00 | Gear,Injection Pump Drive | 1 |
| YM***00 | Gear | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Cooling Water System
| YM***10 | Protector | 1 |
| YM***02 | Screw | 4 |
| YM***50 | Pulley | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Crankshaft & Piston
| YM***00 | Connecting Rod, Assembly | 4 |
| YM***80 | Gear, Ring | 1 |
| YM***10 | Bush,Idle Gear (Repair Part) | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Cylinder Block
| YM***00 | Screw | 18 |
| YM***20 | Screw | 10 |
| YM***40 | Bearing, Thrust (+0.25 mm) | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Cylinder Head
| 87***39 | Aspirated Engine | 1 |
| YM***70 | Cap Valve | 8 |
| YM***02 | Bolt | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Engine Stop Device
| YM***00 | Pin, Cotter | 2 |
| YM***02 | Nut | 1 |
| YM***10 | Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Exhaust Manifold & Silencer
| YM***02 | Screw | 2 |
| YM***02 | Nut | 6 |
| YM***01 | Gasket (Kit) | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Feed Pump
| YM***40 | Gasket | 4 |
| YM***60 | O-Ring | 2 |
| YM***00 | Screw | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Flywheel Housing & Oil Sump
| YM***02 | Screw | 26 |
| YM***20 | Oil Sump | 1 |
| YM***80 | Parallel Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Fuel Injection Pump (1/2)
| YM***00 | Segment | 4 |
| YM***00 | Gasket Disc | 4 |
| YM***20 | Valve,Delivery | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Fuel Injection Pump (2/2)
| YM***40 | Gasket | 2 |
| YM***20 | Bearing,(Toyo) | 1 |
| YM***40 | Nut | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Fuel Injection Valve
| YM***00 | Nozzle | 4 |
| YM***02 | Bolt Plated | 1 |
| YM***20 | Spring | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Fuel Line (1/2)
| YM***10 | Banjo Fitting | 1 |
| YM***80 | Screw | 1 |
| YM***11 | Clamp | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Fuel Line (2/2)
| YM***02 | Screw | 1 |
| YM***22 | Center Bolt | 1 |
| YM***00 | Banjo Bolt | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Gasket Kit
| YM***00 | O-Ring (Kit) | 1 |
| YM***40 | O-Ring,Drain Plug | 1 |
| YM***01 | Gasket (Kit) | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Gear Housing
| YM***02 | Bolt Plated | 11 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***02 | Screw | 6 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Generator : Unit_01_of_02
| YM***20 | Timer,Solenoid | 1 |
| YM***40 | Distance Piece | 1 |
| YM***40 | Screw | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Generator : Unit_02_of_02
| YM***10 | Pulley | 1 |
| YM***60 | Spool & Housing | 1 |
| YM***20 | Bolt Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Governor (1/2)
| YM***40 | Screw | 1 |
| YM***00 | Screw | 1 |
| YM***10 | Screw | 6 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Governor (2/2)
| YM***40 | Screw | 1 |
| YM***00 | Nut | 1 |
| YM***40 | Shim, 0.300 mm | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Lubricating Oil Line
| YM***81 | Retainer | 1 |
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***02 | Seal,Ring (Kit) | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Lubricating Oil System
| YM***00 | O-Ring (Kit) | 1 |
| YM***30 | Shim, 1.000 mm | 1 |
| YM***00 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Starting Motor
| YM***30 | Dust Cover Set | 1 |
| YM***71 | Brush Holder Ass'Y | 1 |
| YM***10 | Terminal Cover | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine : Suction Manifold
| YM***00 | Heather Air | 1 |
| YM***02 | Screw | 1 |
| YM***02 | Screw | 9 |
Engine Related Parts And Electrical System
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Air Filter
| 31***93 | Hose, Suction Air | 1 |
| 31***16 | Hose (Aspirated Engine) | 1 |
| 31***32 | Filter Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Artic Version
| 88***28 | Battery | 1 |
| YM***43 | 30? C Heather Air | 1 |
| YM***64 | Relay, Pre-Heating Timer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Battery Detachment
| 31***88 | Terminal (+), Assembly | 1 |
| 31***10 | Switch Support | 1 |
| 80***66 | Bolt | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (1/6)
| 31***57 | Support | 1 |
| 31***15 | Wiring Harness, Assembly | 1 |
| 80***08 | Bolt (Only With Cabin) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (2/6)
| 31***66 | Wiring Harness, Rear | 1 |
| 31***68 | Wiring, Electro-Valve Line | 1 |
| 31***11 | Wiring Harness, Front | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (3/6)
| 31***90 | Terminal (-), Assembly | 1 |
| 31***01 | Terminal(+), Assembly | 1 |
| 31***79 | Battery Retainer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (4/6)
| 31***01 | Number Plate Support | 2 |
| 80***86 | Washer | 2 |
| 80***27 | Screw | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (5/6)
| 80***44 | Bolt | 1 |
| 80***47 | Bolt | 1 |
| 80***43 | Screw | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Electrical System (6/6)
| 31***69 | Wiring, Transmission Line | 1 |
| 31***00 | Acustic Alarm | 1 |
| 31***00 | Acustic Alarm Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Engine And Drive Connection
| 31***85 | Dip Oil Stick | 1 |
| 31***10 | Level Pipe | 1 |
| 31***14 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Engine Mounting Part
| 31***62 | Right Support | 1 |
| 31***65 | Left Support | 1 |
| 31***89 | Motor Support | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Front Dashboard (1/2)
| 80***51 | Screw | 4 |
| 80***05 | Spring Washer | 4 |
| 88***38 | Conmutator, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Front Dashboard (2/2)
| 31***64 | Front Dashboard, Assembly | 1 |
| 31***00 | Front Instrument Board | 1 |
| 80***31 | Self-Tapping Screw | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Fuel Piping
| 30***39 | Hose | 1 |
| 31***51 | Hose | 1 |
| 31***52 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Fuel Tank.
| 31***92 | Splash Guard | 1 |
| 31***55 | Level Indicator | 1 |
| 31***78 | Fuel Tank | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Fuses Box
| 31***82 | Box, Assembly | 1 |
| 31***23 | Sensor Wiring 4 Speed | 1 |
| 80***96 | Bolt | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Lateral Dashboard (1/2)
| 31***26 | Lateral Dashboard, Assembly (For Cabin) | 1 |
| 31***01 | Lateral Instrument Board | 1 |
| 80***31 | Self-Tapping Screw | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Lateral Dashboard (2/2)
| 31***55 | Switch | 1 |
| 31***56 | Switch | 1 |
| 88***38 | Automatic Power Relay | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Muffler
| 31***53 | Hose | 1 |
| 31***55 | Stub Pipe | 1 |
| 31***75 | Protection Side Outward | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Prefilter (Optional)
| 31***20 | Hood | 1 |
| 31***19 | Gasket | 1 |
| 31***36 | Gasket | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Radiator
| 31***11 | Gasket | 1 |
| 31***91 | Radiator Support | 2 |
| 31***92 | Protection | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Radiator Tank
| 31***69 | Chamber | 1 |
| 31***94 | Upper Support | 1 |
| 31***83 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Engine Related Parts And Electrical System : Self Supply Pump (Optional)
| 30***41 | Pipe | 1 |
| 31***90 | Closure | 1 |
| 31***49 | Pin | 1 |
Frame
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Axle Lubricating Piping
| 39***45 | Tube | 1 |
| 50***15 | Union | 1 |
| 50***52 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Frame
| 31***66 | Frame Vertical Outrigger | 1 |
| 31***01 | Plate | 2 |
| 31***09 | Gasket | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (2wd) (1/3)
| 20***22 | Front Axle, Assembly | 1 |
| CA***10 | Bushing | 1 |
| CA***30 | Spring Washer | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (2wd) (2/3)
| CA***10 | Greaser Nipple | 2 |
| CA***95 | Jack | 1 |
| CA***11 | Fitting | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (2wd) (3/3)
| CA***81 | Thrust Washer | 2 |
| CA***70 | Bearing | 4 |
| CA***40 | Pin | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (1/6)
| 20***34 | Front Axle, Assembly | 1 |
| CA***10 | Bushing | 1 |
| CA***35 | Bush | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (2/6)
| CA***10 | Greaser Nipple | 2 |
| CA***95 | Jack | 1 |
| CA***11 | Fitting | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (3/6)
| CA***70 | Shim, 3.000 mm | 0 |
| CA***68 | Shim, 2.800 mm | 0 |
| CA***50 | Bearing | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (4/6)
| CA***09 | Bearing | 2 |
| CA***78 | Locking Plate | 2 |
| CA***61 | Differential Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (5/6)
| CA***61 | Double Joint | 2 |
| CA***46 | Fork (Differential Side) | 1 |
| CA***92 | Spacer | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle (4wd) (6/6)
| CA***90 | Centering Bush | 16 |
| CA***70 | Bearing | 4 |
| CA***40 | Pin | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Axle Fixing (2wd)
| 31***00 | Front Support | 1 |
| 31***01 | Rear Support | 1 |
| 31***02 | Pin | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Front Propeller Shaft And Front Axle Fixing (4wd)
| 31***69 | Shaft | 1 |
| 31***00 | Front Support | 1 |
| 31***01 | Rear Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Handbrake And Rfear Propeller Shaft
| 31***70 | Shaft | 1 |
| 31***75 | Assembly, Cable | 1 |
| 31***32 | Fasterner Cable | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Hydraulic Piping (Brake Line)
| 31***01 | Union | 2 |
| 31***58 | R.H. Pipe | 1 |
| 31***59 | L.H. Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Hydraulic Piping (Rear Axle Locking Control)
| 39***13 | Hose L=1150 | 1 |
| 39***22 | Hose L=800 | 1 |
| 39***51 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Hydraulic Piping (Transmission Cooling Line)
| 39***03 | Hose | 1 |
| 39***01 | Hose | 1 |
| 50***87 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (1/8)
| 20***33 | Rear Axle, Assembly | 1 |
| CA***11 | Oil Seal | 2 |
| CA***50 | Beam Trumpet, L.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (2/8)
| CA***41 | Bevel Gear/Pinion Set | 1 |
| CA***92 | Collapsible Spacer | 1 |
| CA***90 | Seal Ring | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (3/8)
| CA***47 | Bush | 2 |
| CA***67 | Bearing | 2 |
| CA***69 | Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (4/8)
| CA***41 | Shaft | 1 |
| CA***21 | O-Ring | 2 |
| CA***20 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (5/8)
| CA***31 | Quadring | 2 |
| CA***40 | Brake Drive-Plate | 2 |
| CA***57 | Quadring | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (6/8)
| CA***61 | Bush | 2 |
| CA***81 | Spring, L.H | 1 |
| CA***38 | Lock-Lever Bolt | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (7/8)
| CA***90 | Centering Bush | 16 |
| CA***70 | Bearing | 4 |
| CA***38 | Crown Gear | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Rear Axle (8/8)
| CA***77 | Snap Ring | 2 |
| CA***99 | Coupling Bushing | 2 |
| CA***91 | Thrust Washer | 6 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (1/11)
| 20***63 | Drive Shaft, Assembly | 1 |
| CA***90 | Pump Assembly | 1 |
| CA***61 | O-Ring | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (10/11)
| CA***86 | Copper Washer | 1 |
| CA***12 | Valve Cover | 1 |
| CA***40 | Copper Washer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (11/11)
| CA***71 | Flange | 1 |
| CA***69 | Flywheel Towing Plate | 1 |
| CA***50 | Spring Washer | 6 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (2/11)
| CA***70 | Valve Kit | 1 |
| CA***31 | O-Ring | 1 |
| CA***20 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (3/11)
| CA***02 | Gasket | 1 |
| CA***22 | Plug | 4 |
| CA***60 | Copper Washer | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (4/11)
| CA***90 | Seal Ring | 2 |
| CA***86 | Thrust Washer | 2 |
| CA***29 | Bearing | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (5/11)
| CA***86 | Thrust Washer | 1 |
| CA***33 | Gear | 1 |
| CA***60 | Bearing | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (6/11)
| CA***86 | Thrust Washer | 1 |
| CA***38 | Gear | 1 |
| CA***67 | Spacer | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (7/11)
| CA***01 | Ball | 3 |
| CA***00 | Sleeve | 1 |
| CA***03 | Spring | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (8/11)
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (2wd) (9/11)
| CA***22 | Plug | 4 |
| CA***29 | O-Ring | 3 |
| CA***60 | Copper Washer | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (1/13)
| 20***58 | Drive Shaft, Assembly | 1 |
| CA***90 | Pump Assembly | 1 |
| CA***61 | O-Ring | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (10/13)
| CA***86 | Copper Washer | 1 |
| CA***12 | Valve Cover | 1 |
| CA***40 | Copper Washer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (11/13)
| CA***22 | Plug | 4 |
| CA***29 | O-Ring | 3 |
| CA***60 | Copper Washer | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (12/13)
| CA***02 | Gasket | 1 |
| CA***22 | Plug | 1 |
| CA***60 | Copper Washer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (13/13)
| CA***71 | Flange | 1 |
| CA***69 | Flywheel Towing Plate | 1 |
| CA***50 | Spring Washer | 6 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (2/13)
| CA***70 | Valve Kit | 1 |
| CA***31 | O-Ring | 1 |
| CA***20 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (3/13)
| CA***22 | Plug | 3 |
| CA***60 | Copper Washer | 3 |
| CA***68 | Breather Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (4/13)
| CA***90 | Seal Ring | 2 |
| CA***86 | Thrust Washer | 2 |
| CA***29 | Bearing | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (5/13)
| CA***86 | Thrust Washer | 1 |
| CA***33 | Gear | 1 |
| CA***60 | Bearing | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (6/13)
| CA***86 | Thrust Washer | 1 |
| CA***73 | Gear | 1 |
| CA***38 | Gear | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (7/13)
| CA***01 | Ball | 3 |
| CA***00 | Sleeve | 1 |
| CA***03 | Spring | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (8/13)
| CA***84 | Seal Ring | 1 |
| CA***63 | Snap Ring | 1 |
| CA***29 | Bearing | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Transmission (4wd) (9/13)
| CA***04 | Drive Fork 3-4 | 1 |
| CA***17 | Bolt | 1 |
| CA***93 | Bolt | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Wheels
| 31***50 | Front Rim | 2 |
| 31***66 | Rear Rim | 2 |
| 81***06 | Tyre, Front (12.5/80-18 10pr) | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Frame : Wheels (Optionals)
| 31***63 | Rim 11x18'' Ny | 2 |
| 31***72 | Rim W16l-26'' | 2 |
| 81***18 | Tyre (18.4-26 12pr) | 2 |
Guard And Operator'S Cab
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Additional Kit For Air Blending System
| 31***15 | Support | 4 |
| 31***16 | Condenser Support | 1 |
| 31***29 | Gasket | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (1/11)
| 31***24 | Operator'S Cab, Assembly | 1 |
| 31***10 | Cabin Structure | 1 |
| 31***80 | Glass Window, Lower | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (10/11)
| 80***86 | Washer | 4 |
| 80***56 | Bolt | 4 |
| 80***60 | Screw | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (11/11)
| 80***25 | Screw | 4 |
| 80***60 | Screw | 8 |
| 80***06 | Washer, Spring | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (2/11)
| 80***86 | Washer | 4 |
| 80***00 | Screw (Only For Germany) | 4 |
| 80***56 | Screw | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (3/11)
| 80***71 | Bolt | 4 |
| 80***45 | Screw | 2 |
| 80***08 | Nut (With Stabilizers Only) | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (4/11)
| 31***41 | Cylinder | 2 |
| 31***42 | Spring | 4 |
| 31***43 | Pin | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (5/11)
| 80***48 | Bolt | 4 |
| 80***64 | Screw | 5 |
| 80***66 | Self Taping Screw | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (6/11)
| 31***42 | Tie-Rod R.H. (2nd Version) | 1 |
| 31***43 | Tie-Rod L.H. (2nd Version) | 1 |
| 31***44 | Spring R.H. (2nd Version) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (7/11)
| 80***64 | Screw | 2 |
| 80***64 | Self Taping Screw | 2 |
| 80***06 | Spring Washer | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (8/11)
| 31***03 | Canopy | 1 |
| 31***31 | Washer | 5 |
| 31***32 | Washer | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin (9/11)
| 80***30 | Boltw | 1 |
| 80***32 | Self Taping Screw | 8 |
| 80***56 | Self Taping Screw | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin Air Blending System (1/2)
| 31***03 | Cock Support | 1 |
| 31***72 | Battery | 1 |
| 31***74 | Valve | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Cabin Air Blending System (2/2)
| 31***80 | Wall | 1 |
| 31***84 | Switch Wiring | 1 |
| 31***02 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Covers (1/3)
| 31***65 | Hinge Linkage | 1 |
| 31***84 | Inspection Plug | 1 |
| 31***99 | Hood | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Covers (2/3)
| 31***00 | Front Closure | 1 |
| 31***03 | Ballast 310 Kg | 1 |
| 31***10 | Ballast 150 Kg | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Covers (3/3)
| 31***01 | Right Splash-Board (Cabin) | 1 |
| 31***02 | Left Splash-Board (Cabin) | 1 |
| 31***20 | Right Closure (Cabin) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Dashboard, Floor Mat (Cabin)
| 31***67 | Floor Board | 1 |
| 31***90 | Lateral Dashboard | 1 |
| 31***05 | Front Dashboard | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Front Splash-Board (Optionals)
| 31***55 | R.H. Splash-Board Support | 1 |
| 31***56 | L.H. Splash-Board Support | 1 |
| 31***19 | R.H. Splash-Board | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Heating System (1/2)
| 31***80 | Wall | 1 |
| 31***03 | Cock Support | 1 |
| 80***45 | Screw | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Heating System (2/2)
| 31***68 | Control Cable | 1 |
| 31***19 | Hose Protection | 1 |
| 31***02 | Adhesive Plate | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Motor Air Blending System (1/2)
| 31***97 | Fan Protection | 1 |
| 31***54 | Condenser | 1 |
| 31***55 | Upper Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Motor Air Blending System (2/2)
| 31***09 | Gasket | 1 |
| 31***51 | Compressor | 1 |
| 31***57 | Filter | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Guard And Operator'S Cab : Operator'S Seat
| 31***64 | Box | 1 |
| 31***66 | Box | 1 |
| 31***14 | Operator'S Seat Stand | 1 |
Hydraulic System Work Equipment
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Adjustable Guide
| 31***07 | Pin | 1 |
| 31***50 | Support | 1 |
| 31***51 | Stud Bolt Steering | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (1/8)
| 84***24 | Control Valve,Assembly | 1 |
| 84***68 | Inlet Element, Assembly | 1 |
| 84***69 | Block, Boom Control Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (2/8)
| 84***13 | Gasket Kit | 1 |
| 84***77 | Pressure Relief Valve | 1 |
| 84***78 | Regolatore Di Flusso | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (3/8)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (4/8)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (5/8)
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
| 84***19 | Gasket Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (6/8)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (7/8)
| 84***74 | Gasket Kit, Secondary Valve | 1 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (8 Section)
| 84***28 | Control Valve, Assembly | 1 |
| 84***68 | Inlet Element, Assembly | 1 |
| 84***69 | Block, Boom Control Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (8/8)
| 84***52 | Valve Kit | 1 |
| 84***53 | Solenoid | 1 |
| 84***54 | Valve, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (For Deportable)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Backhoe Control Valve (For Telescopic)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Bucket Hydraulic Piping (Fast Coupling Line) (Optional)
| 20***51 | Coupling, Assembly. (For Hand Hammer) | 1 |
| 20***52 | Fitting (For Hand Hammer) | 1 |
| 20***53 | Body (For Hand Hammer) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Bucket Hydraulic Piping (Mechanical Fast Coupling Line4 In 1) (Optiona
| 20***51 | Coupling, Assembly. (For Hand Hammer) | 2 |
| 20***52 | Fitting (For Hand Hammer) | 1 |
| 20***53 | Body (For Hand Hammer) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Control Valve (7 Section) (For Deportable)
| 84***27 | Control Valve, Assembly | 1 |
| 84***68 | Inlet Element, Assembly | 1 |
| 84***69 | Block, Boom Control Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Control Valve (7 Sections) (For Hammer) (1/2)
| 84***26 | Control Valve, Assembly | 1 |
| 84***68 | Inlet Element, Assembly | 1 |
| 84***69 | Block, Boom Control Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Control Valve (7 Sections) (For Hammer) (2/2)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Control Valve (7 Sections) (For Jig Arm)
| 84***25 | Control Valve, Assembly | 1 |
| 84***62 | Tie Rods Kit | 1 |
| 84***68 | Inlet Element, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Floor Board Hydraulic Tank
| 31***19 | Splash Guard | 1 |
| 31***61 | Floor Board | 1 |
| 80***08 | Bolt (Only With Cabin) | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hammer Hydraulic Piping With Jig Arm (1/2)
| 31***21 | Bushing | 2 |
| 39***04 | Hose | 1 |
| 39***01 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hammer Hydraulic Piping With Jig Arm (2/2)
| 31***96 | Pipe | 1 |
| 31***97 | Pipe | 1 |
| 39***07 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Arm And Bucket Cylinder Line) (For Side Digging Boom
| 31***58 | Pipe | 1 |
| 31***57 | Pipe | 1 |
| 31***59 | Pipe, R.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Arm Cylinder Line)
| 31***17 | Pin | 1 |
| 31***21 | Bushing | 2 |
| 39***67 | Pin | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Arm Cylinder Line) (Safety Valve)
| 31***65 | Pipe | 1 |
| 31***71 | Union | 1 |
| 31***72 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Boom Cylinder Line)
| 31***11 | Pin | 1 |
| 31***41 | Buckle | 2 |
| 31***42 | Plate | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Boom Cylinder) (Safety Valve)
| 31***60 | Pipe | 1 |
| 31***61 | Pipe | 1 |
| 31***62 | Pipe, R.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Boom Swing Cylinder Line)
| 31***10 | Buckle | 2 |
| 31***11 | Support | 4 |
| 39***62 | Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Bucket - 4 In 1 Cylinder Line) (1/2)
| 31***26 | Protection | 2 |
| 31***52 | Pipe, R.H | 1 |
| 31***53 | Pipe, L.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Bucket - 4 In 1 Cylinder Line) (2/2)
| 31***78 | Pin | 2 |
| 31***80 | Bucket 4 In 1, Assembly | 1 |
| 31***18 | Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (1/2)
| 31***21 | Bushing | 2 |
| 39***13 | Hose | 2 |
| 50***13 | Union | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (2/2)
| 31***97 | Pipe | 1 |
| 31***05 | Pin | 1 |
| 31***18 | Spacer | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (For Jig Arm)
| 31***64 | Pipe, R.H | 1 |
| 31***65 | Pipe, L.H | 1 |
| 31***66 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Delivery Line)
| 20***90 | Pressure Take-Up | 1 |
| 31***81 | Pipe | 1 |
| 39***13 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Hammer Line) (1/3)
| 39***09 | Hose | 1 |
| 39***13 | Hose | 1 |
| 50***06 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Hammer Line) (2/3)
| 31***54 | Extension | 1 |
| 31***21 | Bushing | 2 |
| 39***06 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Hammer Line) (3/3)
| 31***05 | Support R.H | 1 |
| 31***06 | Support L.H | 1 |
| 39***06 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Jig Arm Cylinder Line)
| 31***21 | Bushing | 2 |
| 39***16 | Hose | 1 |
| 39***02 | Hose | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Locker Cylinder Line)
| 31***51 | Jack | 4 |
| 31***00 | Liner | 1 |
| 31***02 | Piston | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Oil Cooler And Return Line) (1/2)
| 31***70 | Support | 1 |
| 31***73 | Pipe | 1 |
| 31***14 | Union | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Oil Cooler And Return Line) (2/2)
| 31***17 | Union | 1 |
| 31***41 | Protection | 1 |
| 39***01 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Ride Control) (1/2) (Optional)
| 31***00 | Union | 1 |
| 31***01 | Support | 1 |
| 31***02 | Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Ride Control) (2/2) (Optional)
| 39***19 | Hose | 1 |
| 39***25 | Hose | 1 |
| 39***36 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Ride Control) (With Hammer) (2/2) (Optional)
| 39***19 | Hose | 1 |
| 39***25 | Hose | 1 |
| 39***36 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Lifting Cylinder Line) (1/2)
| 31***63 | Support | 1 |
| 31***75 | Pipe | 1 |
| 31***76 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Lifting Cylinder Line) (2/2)
| 20***70 | Buckle | 2 |
| 31***65 | Pin ? 50 | 2 |
| 31***13 | Pin ? 45 | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Lifting Cylinder) (Electric Safety Valve)
| 20***70 | Buckle | 4 |
| 31***00 | Fastener | 2 |
| 31***01 | Plate | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Lifting Cylinder) (Safety Valve)
| 31***50 | Valve Support | 2 |
| 31***57 | Lifting Pipe, R.H | 1 |
| 31***58 | Lifting Pipe, L.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Tipping Cylinder Line) (1/2)
| 31***64 | Buckle | 2 |
| 31***77 | Pipe | 1 |
| 31***78 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Tipping Cylinder Line) (2/2)
| 31***65 | Pin ? 50 | 2 |
| 31***13 | Pin ? 45 | 2 |
| 36***11 | Protection | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Tipping Cylinder Line) (With Return To Dig)
| 31***07 | Protection | 1 |
| 31***06 | Support | 1 |
| 31***03 | Protection | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Tipping Cylinder) (Electric Safety Valve)
| 31***00 | Fastener | 2 |
| 31***01 | Plate | 2 |
| 31***75 | Pipe | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Shovel Tipping Cylinder) (Safety Valve)
| 31***61 | Tipping Pipe, R.H | 1 |
| 31***62 | Tipping Pipe, L.H | 1 |
| 31***63 | Tipping Pipe | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Side Digging Boom Cylinder Line)
| 39***02 | Hose | 1 |
| 39***03 | Hose | 1 |
| 50***23 | Union | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Steering Line) (1/2)
| 20***90 | Pressure Take-Up | 1 |
| 30***38 | Retainer | 1 |
| 31***54 | Hose | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Steering Line) (2/2)
| 39***25 | Hose | 1 |
| 39***01 | Hose | 2 |
| 50***46 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Suction)
| 31***74 | Suction Flange | 1 |
| 31***43 | Aspiration Oil Tube | 1 |
| 31***44 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Piping (Vertical Outrigger Cylinder Line)
| 31***66 | Tube | 1 |
| 31***67 | Tube | 1 |
| 31***68 | Tube | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Pump (1/2)
| 84***22 | Pump Assembly (Turbo Engine) | 1 |
| 84***22 | Gruppo Rotante | 1 |
| 84***23 | Unita' Di Controllo | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Pump (2/2)
| 84***17 | Pilot Valve | 1 |
| 84***18 | Pilot Valve | 1 |
| 84***30 | O-Ring | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Hydraulic Tank
| 20***59 | Indicator Oil Level | 1 |
| 20***60 | Breather Plug | 1 |
| 31***48 | Breather Oil Container | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (1/4)
| 84***30 | Shovel Control Valve,Assembly | 1 |
| 84***11 | Big Plug | 1 |
| 84***94 | Outlet Section, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (2/4)
| 84***04 | Piston Kit | 1 |
| 84***08 | Spool Return Unit | 1 |
| 84***09 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (3/4)
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
| 84***19 | Gasket Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (4/4)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (1/5)
| 84***65 | Shovel Control Valve,Assembly | 1 |
| 84***11 | Big Plug | 1 |
| 84***63 | Floating Block, Shovel Lifting, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (2/5)
| 84***04 | Piston Kit | 1 |
| 84***08 | Spool Return Unit | 1 |
| 84***09 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (3/5)
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
| 84***17 | Operating Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (4/5)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (5/5)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (For Bucket 4 In 1) (With Return To Dig)
| 84***66 | Shovel Control Valve,Assembly | 1 |
| 84***11 | Big Plug | 1 |
| 84***63 | Floating Block, Shovel Lifting, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (With Return To Dig) (1/4)
| 84***31 | Shovel Control Valve,Assembly | 1 |
| 84***11 | Big Plug | 1 |
| 84***63 | Floating Block, Shovel Lifting, Assembly | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (With Return To Dig) (2/4)
| 84***04 | Piston Kit | 1 |
| 84***08 | Spool Return Unit | 1 |
| 84***09 | Plug | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (With Return To Dig) (3/4)
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
| 84***17 | Operating Kit | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Shovel Control Valve (With Return To Dig) (4/4)
| 84***74 | Gasket Kit, Secondary Valve | 2 |
| 84***13 | Gasket Kit | 1 |
| 84***16 | Valve Kit | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Hydraulic System Work Equipment : Vertical Outrigger Cylinder
| 39***11 | Cylinder | 1 |
| 39***11 | Rod | 1 |
| 3F***06 | Piston | 1 |
Mark Plate
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Accessories For Germany (20 And 40 Km/H) (1/2)
| 31***53 | Arm For Right Mirror | 1 |
| 31***14 | Oil Tank | 1 |
| 31***15 | Gas Oil Tank | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Accessories For Germany (20 And 40 Km/H) (2/2)
| 31***55 | Arm | 1 |
| 31***57 | Frame | 1 |
| 81***05 | Tie-Rod | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Accessories For Germany (20 Km/H Version)
| 81***81 | Plate, Max. Speed 20 Km/H (Germany) | 3 |
| 88***36 | Knob Cover | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Accessories For Germany (40 Km/H Version)
| 31***01 | Front Number Plate Support | 1 |
| 31***02 | Number Plate Support | 1 |
| 31***00 | Plate, 40 Km/H Speed | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Equipment
| 31***55 | Washer | 2 |
| 31***51 | Fastener | 1 |
| 31***50 | Pin | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Equipment For Germany
| 80***82 | Bolt | 8 |
| 80***01 | Spring Washer (With Stabilizers Only) | 8 |
| 82***28 | Warning Triangle | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Stickers - Warning Plate (1/3)
| 31***01 | Plate, Lubricating Points | 1 |
| 31***23 | Plate, Raising Capacity (Standard/Telesc.) | 1 |
| 31***24 | Plate, Raising Capacity (Side Digging+Std/Telesc.) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Stickers - Warning Plate (2/3)
| 31***22 | Plate, Speed Scheme (Only For Germany) | 1 |
| 31***12 | Plate, Hydraulic Transmission Scheme | 1 |
| 31***40 | Plate, Arm Controls | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Stickers - Warning Plate (3/3)
| 31***35 | Plate, Multifunctional Control | 1 |
| 31***04 | Plate, ''Air Recycle'' | 1 |
| 35***28 | Plate, Shovel Lock (Only For Germany) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Mark Plate : Tool
| 82***43 | Filter Cartridge Wrench | 1 |
| 82***50 | Box Wrench (27 mm) | 1 |
| 82***52 | Box Wrench (32 mm) | 1 |
Work Equipment
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Arm And Bucket
| 20***90 | Pin | 2 |
| 20***69 | Tie-Rod | 1 |
| 31***52 | Corner, R.H | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Arm Cylinder
| 39***11 | Bushing | 1 |
| 39***13 | Cylinder | 1 |
| 39***11 | Rod | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Arm Cylinder (For Side Digging Boom)
| 39***11 | Bushing | 1 |
| 39***11 | Cylinder | 1 |
| 39***15 | Piston Rod | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Blade : Unit_01_of_02
| 31***50 | Blade | 1 |
| 80***13 | Bolt | 8 |
| 80***12 | Nut | 8 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Blade : Unit_02_of_02
| 31***50 | Blade | 1 |
| 80***99 | Bolt | 3 |
| 80***11 | Nut | 3 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Boom Cylinder
| 31***03 | Pipe Stopper | 1 |
| 39***07 | Plug | 1 |
| 39***14 | Bushing | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Boom Swing Cylinder
| 31***02 | Cylinder | 1 |
| 39***58 | Bushing | 1 |
| 39***12 | Cylinder, Right | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bracket And Boom (1/2)
| 31***56 | Bracket | 1 |
| 31***08 | Plate | 1 |
| 31***27 | Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bracket And Boom (2/2)
| 31***57 | Cylinder | 1 |
| 31***25 | Union | 1 |
| 31***26 | Union | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bucket - 4 In 1
| 31***54 | Tooth | 8 |
| 31***19 | Pin | 2 |
| 39***41 | Bushing | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bucket - 4 In 1 - Fast Coupling
| 31***54 | Tooth | 8 |
| 31***19 | Pin | 2 |
| 39***41 | Bushing | 4 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bucket 4 In 1 Cylinder
| 31***03 | Piston Rod | 1 |
| 31***04 | Cylinder | 1 |
| 31***74 | Bucket 4 In 1 Cylinder, Assembly | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Bucket Cylinder
| 39***12 | Cylinder | 1 |
| 39***12 | Shaft | 1 |
| 39***12 | Piston | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Fork (For Bucket 4 In 1)
| 31***50 | Rod | 2 |
| 31***51 | Fork | 2 |
| 31***09 | Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Fork (For Bucket)
| 31***51 | Bucket | 1 |
| 31***53 | Bucket With Fork, Assembly | 1 |
| 31***51 | Fork | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Hammer M50 (1/2)
| 82***31 | M50 Hammer, Assembly | 1 |
| 82***33 | Chisel Point (Optional) | 1 |
| 82***38 | Flat Point (Optional) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Hammer M50 (2/2)
| 82***54 | Fitting | 1 |
| 82***55 | Retainer | 2 |
| 82***56 | Pin | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Hammer M60 (1/2)
| 82***32 | M60 Hammer, Assembly | 1 |
| 82***34 | Chisel Point (Optional) | 1 |
| 82***45 | Flat Point (Optional) | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Hammer M60 (2/2)
| 82***54 | Fitting | 2 |
| 82***58 | Spring | 2 |
| 82***61 | Adjuster Shim | 10 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Jack (Quick Coupling For Bucket) (Optional)
| 20***19 | Cylinder | 1 |
| 50***13 | Piston | 2 |
| 50***14 | Piston Rod | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Jig Arm
| 20***02 | Lever, R.H | 1 |
| 20***03 | Lever, L.H | 1 |
| 31***00 | Pin | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Jig Arm Cylinder : Unit_02_of_02
| 31***53 | Pipe | 1 |
| 31***63 | Clamp | 1 |
| 31***68 | Pipe | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Jig Arm Cylinder : Unit_01_of_02
| 39***12 | Cylinder Head | 1 |
| 39***12 | Cylinder | 1 |
| 39***14 | Rod | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Quick Hydraulic Coupling For Bucket (Optional)
| 20***82 | Jack | 1 |
| 31***59 | Total | 1 |
| 31***47 | Closure | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Quick Hydraulic Coupling For Bucket 4 In 1 (Optional)
| 20***82 | Jack | 1 |
| 31***59 | Total | 1 |
| 31***47 | Closure | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Quick Mechanical Coupling For Bucket (Optional)
| 31***59 | Total | 1 |
| 31***61 | Lever, Assembly | 1 |
| 31***67 | Clousure | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Quick Mechanical Coupling For Bucket 4 In 1 (Optional)
| 31***59 | Total | 1 |
| 31***61 | Lever, Assembly | 1 |
| 31***67 | Clousure | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Shovel Bucket And Arm
| 31***54 | Tooth | 8 |
| 31***65 | Pin ? 50 | 2 |
| 31***52 | Arm | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Shovel Dumping Left Cylinder
| 39***13 | Bushing | 1 |
| 39***13 | Cylinder Head | 1 |
| 39***12 | Cylinder | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Shovel Dumping Right Cylinder
| 39***13 | Bushing | 1 |
| 39***13 | Cylinder Head | 1 |
| 39***13 | Cylinder | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Shovel Lifting Cylinder
| 39***13 | Bushing | 1 |
| 39***11 | Cylinder Head | 1 |
| 39***12 | Cylinder | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Side Digging Boom
| 20***79 | Pin | 1 |
| 20***30 | Articulation | 1 |
| 20***75 | Support | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Side Digging Boom Cylinder
| 20***40 | Side Digging Boom Cylinder, Assembly | 1 |
| 20***20 | Cylinder | 1 |
| 20***80 | Piston Rod | 1 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Vertical Outrigger
| 20***16 | Outrigger | 2 |
| 31***53 | Plate | 4 |
| 31***50 | Foot | 2 |
Komatsu : Wb91r-2(S/N 91f20127-Up) : Work Equipment : Vertical Outrigger (With Rubber)
| 20***16 | Outrigger | 2 |
| 20***52 | Rubber (Optional) | 2 |
| 31***53 | Plate | 4 |
WB91R-2(S/N 91F20127-Up) serial number reference
The PIN plate is riveted to 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 first four characters (e.g., 91F2) to identify the model family and serial break, then verify the numeric sequence against the machine's specific build range.
| Prefix | Identifies | Notes |
|---|---|---|
| 91F2 | WB91R-2 | Serial range 91F20127-Up. Engine: Komatsu 4D106-2SFA (61 kW). Confirmed by Operation & Maintenance Manual WEAM002304 and parts catalog variants. |
Frequently asked questions
What engine does the WB91R-2 use?
The WB91R-2 uses a Komatsu 4D106-1FA naturally aspirated diesel engine with 4 cylinders and a displacement of 4,413.0 cc (269.3 cu in).
What is the operating weight of the WB91R-2?
The operating weight varies by configuration, ranging from 7,497.9 kg (16,530 lbs) to 8,580 kg (18,916 lbs).
What model replaced the WB91R-2?
The WB91R-5 succeeded the WB91R-2 in Komatsu's backhoe loader lineup.
What WB91R-2(S/N 91F20127-Up) owners discuss
What engine powers the WB91R-2(S/N 91F20127-Up) and what are its power specifications?
The machine uses a Komatsu 4D106-2SFA diesel engine. It delivers a maximum power of 61 kW at 2200 rpm and a maximum torque of 310 Nm at 1500±100 rpm. Gross power is rated at 90.8 hp. Some sources cite a broader power range of 67.7/82.5 kW/HP for the WB91R-2 series, which varies by configuration/series and regional emissions package. The engine is robust but sensitive to contamination and extended service intervals, which can accelerate wear on fuel delivery components and injectors.
What are the common hydraulic behaviors and troubleshooting patterns for this loader?
Hydraulic performance is governed by a pump flow capacity of 43.6 gpm. A common diagnostic pattern is weak hydraulics when hot but strong when cold, indicating internal leakage in the pump, main control valve, or cylinders due to decreased oil viscosity. If all functions are slow, check hydraulic oil level, correct oil specification, filters, and engine RPM under load. If only one function is slow, investigate the specific cylinder, control valve spool, or load-holding valve. Ensure the hydraulic oil meets Komatsu specifications (e.g., Komatsu EO, TO, AXO, HO) to prevent cavitation and pump wear.
What are the typical undercarriage and wear patterns for this machine type?
As a wheel loader/backhoe combination, wear focuses on the front axle, final reduction gears, and tires rather than track undercarriage. The front axle differential and final reduction gears require oil changes every 1000 hours. Check for oil leaks at drain plugs and level indicators. The machine has a travel speed of 40 km/h. Monitor tire condition and pressure for ground pressure management. The backhoe attachment experiences high stress on pins and bushings; inspect for play during routine maintenance. The loader bucket breakout force is 13405.4 lbs, and the backhoe dig force is 7870.6 lbs, which dictates wear rates on linkage components.
What electrical or sensor issues are commonly reported for Komatsu machines of this era?
Komatsu machines of this generation rely on electronic control systems. Common issues include intermittent starting, dashboard display failures, or random shutdowns caused by faulty sensors or unstable power supply. Check battery state of charge, battery terminals, engine and chassis grounds, and the main starter cable. A battery may show acceptable voltage until the starter is loaded; perform a load and voltage-drop test if starting is sluggish. Inspect connectors for corrosion or looseness, especially in the wiring harness near the engine and transmission, as loose grounds can trigger multiple fault codes.
What is the critical maintenance interval for the hydraulic transmission oil and filter?
Change the hydraulic transmission oil and filter every 1000 hours of operation. Drain the oil at operating temperature to ensure suspended particles are removed. Use a 27 mm spanner for the drain plug. Replace the transmission filter simultaneously. Refill to the MIN. level on the dipstick with the engine idling to fill the converter and internal circuits. Once the oil reaches approximately 50°C, top up to the MAX. mark. Always use the prescribed oil type. Oils, filters, coolant, and batteries are special waste and must be disposed of according to anti-pollution regulations.
What should be checked when buying a used WB91R-2(S/N 91F20127-Up)?
Verify the exact serial number prefix to ensure the correct service manual (e.g., WEAM002304 or WEBM000404) applies, as specifications vary by serial range. Check the engine oil pressure and hydraulic system pressure against factory spec sheet values. Inspect the cooling package (radiator, hydraulic oil cooler, charge-air cooler) for packed debris between heat exchangers. Test all hydraulic functions for speed and strength, both cold and hot. Check for leaks in the front axle differential and final reduction gears. Verify the condition of the 4D106-2SFA engine, including fuel filters, air filter, and injector performance. Ensure the electrical system is stable with no intermittent fault codes.
What safety-critical checks are required before maintenance or operation?
Ensure all mechanical safety locks for the front loader and backhoe are engaged before operation or maintenance. Verify the control lever locks are functional. For maintenance, stop the engine, apply the parking brake, and use warning plates to prevent accidental starting. Deactivate electrical safety valves on the front loader via the switch if installed. When checking hydraulic transmission oil, wear insulating gloves, goggles, and safety shoes due to high oil temperature. Have your dealer verify hydraulic pressure settings and engine valve clearance adjustments, as these require special tools and precise calibration.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Komatsu WB91R-2(S/N 91F20127-Up). Related factory variants of the same model family:
WB91R-2(S/N 91F20070-Up)WB91R-2(S/N 91F20145-Up)WB91R-2(S/N 91F20001-Up)
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