Komatsuengine(no series)
Komatsu SAA12V140Z-E2-80(S/N 37209742-UP)
Maintenance schedule, common problems & OEM parts breakdown
The SAA12V140Z-E2-80 is a turbocharged, air-to-air aftercooled V12 diesel. It displaces 30.5 L (1,861 cu in) on a 140 x 165 mm bore and stroke and is rated at 603 kW (808 hp) net and 636 kW (853 hp) gross at 2000 rpm, certified to EPA Tier 2 / EU Stage II emissions. The "-80" is Komatsu's factory arrangement code identifying this engine as the power unit built for the WA800-3LC-class wheel loader (the sibling "-90" code covers the equivalent WA900-3LC); that loader generation reached the market around 1998 as Komatsu's large surface and quarry wheel loader, running 101-102 tonnes (223,000-225,000 lb) operating weight with a 10-14 m3 (13-18 yd3) bucket depending on the bucket fitted. It succeeded the WA800-2/WA900-1 generation's mechanically governed SA12V140Z-1 engine, and both standard and LC (long-chassis) loader bodies were offered on this platform.
Within the SAA12V140 engine family, the electronically controlled Z-E2 sat between the earlier Z-1 and the later SAA12V140E-3, which carried the same rated output into later-production loaders of this generation (and the following E0-series update) and was also fitted to unrelated Komatsu iron like the PC2000 excavator and HD785 truck lines. The step from Z-1 to Z-E2 was mainly electronic fuel and governor control layered onto the same 30.5 L big-bore block, aimed at tighter emissions and fuel control rather than a horsepower jump. Because WA800-3-class loaders from this era are still common in mining, quarry, and bulk-material fleets long after Komatsu moved on to Tier-4 WA800-8 machines, the -80 arrangement remains a steady source of used take-out engines, rebuild cores, and wear-part demand for owners keeping this generation of loader working.
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 SAA12V140Z-E2-80(S/N 37209742-UP) specifications
Engine
| Engine model | Komatsu SAA12V140Z-E2, application code -80 for the WA800-series wheel loader platform (WA800-2LC, WA800-3LC). |
| Gross power | 636 kW (853 HP) at 2000 rpm. |
| Net power | 603 kW (808 HP) at 2000 rpm. |
| Displacement | 30.5 L (1,861 cu in). |
| Cylinder configuration | 12-cylinder, V-type, water-cooled, 4-cycle diesel. |
| Bore x stroke | 140 x 165 mm (5.51 x 6.50 in). |
| Aspiration | Turbocharged, air-to-air aftercooled. |
| Emissions | Certified to EPA Tier 2, equivalent to EU Stage II. |
| Generation note | Later production of the host loader carries the same rated output under the SAA12V140E-3 designation. Confirm the exact engine tag against the machine nameplate before ordering parts. |
Weights
| Operating weight (host loader) | Approx. 101.1-101.9 t (222,955-224,650 lb). Varies by configuration: standard vs. long-chassis/wide-track undercarriage, counterweight, and cab options. |
Dimensions
| Overall length, bucket on ground | Approx. 14.0-14.3 m (45.8-47 ft). Varies with bucket fitted. |
| Width over tires | Approx. 4.59 m (15.05-15.08 ft). |
| Height to top of cab | Approx. 5.28 m (17.31-17.33 ft). |
| Wheelbase | Approx. 5.45-5.47 m (17.89-17.93 ft). |
| Ground clearance | Approx. 0.55-0.56 m (1.81-1.83 ft). |
| Tread (tire centerline) | Approx. 3.35 m (11 ft). |
Performance
| Max travel speed, forward | 28 km/h (17.4 mph). |
| Max travel speed, reverse | 28.3 km/h (17.6 mph). |
| Bucket capacity (host loader) | 10.0-14.0 m³ (13.1-18.3 yd³), rated capacity depends on bucket fitted. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
SAA12V140Z-E2-80(S/N 37209742-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 130-132 L (34.3-34.9 US gal) | Komatsu Genuine engine oil (EO). Grade by ambient temperature per the O&M manual chart: SAE10W or 10W-30 in cold climates, 10W-30 or 15W-40 in moderate climates, SAE30 in hot climates. |
| Cooling system | 319-337 L (84.3-89 US gal) | Komatsu genuine ethylene-glycol antifreeze mixed with water per the climate chart in the O&M manual. Use Komatsu's supplemental coolant conditioner where local water or non-genuine antifreeze is used. |
| Fuel tank | 1,425-1,555 L (376.5-410.8 US gal) | ASTM D975 No. 2-D diesel for normal service; switch to No. 1-D or a winter blend in cold climates per the manual's fuel-by-temperature guidance. Keep sulfur content within the engine's emissions-certified limit. |
| Transmission / torque converter case (powertrain) | approx. 140-164 L (37-43 US gal); varies by configuration/series | Komatsu Genuine powertrain oil (TO), same single-viscosity oil family as the engine on this generation of loader (SAE10W across most of the ambient range) per the O&M chart. |
| Hydraulic system (tank/refill) | 725 L (191.5-191.6 US gal) reservoir refill | Komatsu Genuine hydraulic oil (HO), SAE10W grade on this generation of loader, same fluid family as the engine and powertrain oil. Reservoir figure is refill volume; total circuit volume with cylinders and lines charged runs higher and is not separately confirmed for this serial range. |
| Front axle (differential and planetary final drives, shared housing) | approx. 300-360 L (79-95 US gal); varies by configuration/series | Komatsu Genuine axle/gear oil (AXO), viscosity graded SAE10W up to 85W-140 by ambient temperature per the O&M manual. |
| Rear axle (differential and planetary final drives, shared housing) | approx. 300-360 L (79-95 US gal); varies by configuration/series | Komatsu Genuine axle/gear oil (AXO), viscosity graded SAE10W up to 85W-140 by ambient temperature per the O&M manual, same as front axle. |
| Grease (chassis and linkage pins) | spec only, no service-fill volume | Komatsu Genuine multipurpose lithium EP grease (G2-LI), NLGI No. 2, for general chassis and linkage pins. Molybdenum-disulfide type grease (G2-T/G2-TE) at pins calling for extra heat and seizure resistance. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu SAA12V140Z-E2-80(S/N 37209742-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 8,000 h |
|
Servicing the SAA12V140Z-E2-80(S/N 37209742-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Pull engine oil, coolant, and torque-converter oil samples on a fixed interval and trend them; the SAA12V140Z-E2's large-sump, dual-stage full-flow and bypass filtration masks early wear, so lab trending catches liner, bearing, and turbocharger degradation before it shows on the dipstick. Log boost pressure and exhaust temperature at rated rpm each shift on this V12; a slow boost drop flags turbocharger or aftercooler fouling early. Watch coolant conditioner depletion, since this loader runs hard duty cycles that stress the cooling system.
Corrective & Common Repairs
Expect aftercooler and radiator core fouling from quarry and pit dust, which chokes airflow and drives up coolant and intake-air temperature on this aftercooled V12. Turbocharger shaft wear and boost leaks at clamped piping joints are common after sustained loading in this wheel loader's load-and-carry duty cycle. On the driveline, torque converter and modulation clutch wear shows up as slipping or delayed response under full-bucket loads; Z-bar linkage pins and bushings wear quickly on machines running abrasive material and need regular greasing and clearance checks.
Overhaul & Rebuild Points
Top-end overhaul on the SAA12V140Z-E2-80 covers cylinder liner and piston wear, head reconditioning, and injector and turbocharger exchange once oil analysis or blow-by trends turn. Track main and rod bearing clearance against oil-sample metal counts before scheduling a bottom-end rebuild on this big V12. On the chassis, plan torque converter and transmission clutch-pack rebuilds alongside front and rear axle differential and wheel-end planetary overhauls, since this loader's full-floating axles and oscillating rear axle absorb heavy shock loads over a working life.
Seasonal & Environment Servicing
In cold climates, use a block heater or ether-assisted starting aid before cranking this large-displacement V12, and switch to a lower-viscosity winter-grade engine oil and coolant mix rated for the ambient range. In hot, dusty quarry and mine settings, step up radiator, oil cooler, and aftercooler core cleaning and air intake pre-cleaner servicing, since this wheel loader's open engine bay draws heavy debris in surface and pit operations. Check coolant concentration each season change to protect the aluminum aftercooler and cylinder liners from corrosion.
SAA12V140Z-E2-80(S/N 37209742-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6216-74-6120 | Head, Fuel Filter | Fuel system service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6162-53-5450 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6215-51-5690 | Grommet,Oil Filter | Lubrication service | Check fitment → |
| 6216-54-5110 | Filter, Lubricating Oil | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SAA12V140Z-E2-80(S/N 37209742-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine speed (NE) sensor and backup speed sensor signals disagree or are lost | Damaged speed sensor, corroded or loose harness connector, or sensor air gap out of spec from timing-gear wear | Inspect sensor wiring and connector for damage or corrosion, check sensor air gap against spec, replace sensor if signal stays erratic |
| CA144 | Coolant temperature sensor signal reads implausibly high, typically an open circuit | Broken sensor wire, unplugged connector, or failed sensor element | Check sensor connector and wiring for an open circuit, test sensor resistance against spec, replace sensor if out of range |
| CA145 | Coolant temperature sensor signal reads implausibly low, typically a short to ground | Chafed harness shorting to frame or engine ground, or failed sensor element | Inspect harness for chafe points and shorts, test sensor per spec, repair wiring or replace sensor |
| CA435 | Engine oil pressure sensor/switch signal abnormal | Failed sensor, damaged wiring or connector, or genuine low oil pressure tripping the switch | Confirm actual oil level and pressure first, then inspect sensor wiring and connector, replace sensor if wiring checks good |
| CA122 | Charge air (boost) pressure sensor signal reads above plausible range | Sensor fault, blocked or kinked pressure sense line, or corroded connector | Inspect the boost sense line for blockage, check the connector, replace sensor if the line is clear |
| CA123 | Charge air (boost) pressure sensor signal reads below plausible range or open circuit | Disconnected sense line, damaged harness, or failed sensor | Check sense line routing and harness continuity, replace sensor if line and wiring test good |
| CA343 | Engine controller internal fault | Internal controller failure, corrupted calibration data, or a controller power/ground supply problem | Cycle power and recheck, verify controller ground and supply voltage are within spec, replace controller if the fault returns |
| CA1117 | Engine controller lost part of its stored operating data | Battery voltage dip during cranking, loose or corroded controller ground, or a controller memory fault | Check battery condition and charging system output, clean and tighten controller ground connections, reprogram or reset controller parameters if the fault persists |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
All SAA12V140Z-E2-80(S/N 37209742-UP) assemblies by section
Every catalogued assembly group for the Komatsu SAA12V140Z-E2-80(S/N 37209742-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : After Cooler Water Plumbing
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 16 |
| 07***35 | Seal, O-Ring | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Air Intake Connection
| 01***40 | Bolt,(Shim 3-Piece) | 4 |
| 01***50 | Bolt (M10-1.50x150) | 10 |
| 62***10 | Gasket, Connection | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Air Intake Hose
| 67***10 | Hose, Hump | 8 |
| 67***20 | Clamp, Spring Hose | 32 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Air Intake Manifold
| 01***00 | Bolt (M10-1.50x100) | 19 |
| 01***60 | Bolt (M10-1.50x160) | 13 |
| 01***65 | Bolt (M10-1.50x65) | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Air Transfer Connection
| 01***00 | Bolt (M10-1.50x100) | 8 |
| 13***H1 | Clamp, T-Bolt (3 3/4 Inch) | 4 |
| 13***H1 | Hose, Plain | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Alternator - 100a 33si 400 - 24v
| 12***H1 | Bushing, Mounting Hinge | 1 |
| 12***H1 | Rotor Assembly | 1 |
| 12***H1 | Bearing, Ball | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Alternator - Ground Wire
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 12***H1 | Wire, Ground | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Alternator Drive Pulley
| 62***10 | Belt, V-Ribbed | 1 |
| 62***20 | Pulley, Alternator | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Alternator Mounting - With 100 Amp Alternator
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 62***30 | Link, Adjusting | 1 |
| 62***10 | Bolt (1/2 - 13x1 3/4 Inch) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Cam Follower
| 04***12 | Ring, Retaining | 4 |
| 61***20 | Ball | 24 |
| 62***00 | Lever, Cam Follower | 24 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Cam Follower Cover
| 62***20 | Cover,Camfollower | 12 |
| 62***31 | Gasket, Camshaft Cover | 12 |
| 67***60 | Washer, Sealing (M10) | 44 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Camshaft Amd Gear
| 01***25 | Bolt - Rear Guard Mounting | 8 |
| 01***20 | Bolt (M12-1.75x20) | 4 |
| 04***25 | Key, Plain Woodruff | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Corrosion Resistor
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***16 | Washer,(For Shipping Parts) | 2 |
| 62***40 | Decal | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Crankcase Breather
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***20 | Bolt,(Used When Towing Winch) | 1 |
| 01***16 | Washer,(For Shipping Parts) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Crankshaft
| 04***28 | Key, Plain Woodruff | 1 |
| 62***10 | Bearing, Thrust (No. 4) | 3 |
| 62***01 | Crankshaft, Engine | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Cylinder Block
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***20 | Bolt | 12 |
| 01***16 | Washer,(For Shipping Parts) | 12 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Cylinder Head
| 01***20 | Bolt (M10-1.75x120) | 12 |
| 04***20 | Pin,Dowel (Welded) | 24 |
| 07***25 | O-Ring,(For Pc1800e-6)(See Fig.A3110) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Engine Barring Drive
| 62***10 | Drive, Engine Barring | 1 |
| 62***20 | Key, Plain Woodruff | 1 |
| 62***30 | Clip | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Engine Complete And Service
| 42***00 | Engine, Complete And Service | 1 |
| 42***01 | Engine, Complete And Service | 1 |
| 42***02 | Engine, Complete And Service | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Engine Control Module
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***20 | Bolt,(Used When Towing Winch) | 5 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Exhaust Manifold
| 61***50 | Stud, Mounting | 8 |
| 62***81 | Gasket, Exhaust Manifold | 12 |
| 62***31 | Gasket, Turbocharger | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Exhaust Outlet Connection
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fan Drive
| 01***40 | Bolt,(Dust And Dirt Protection) | 8 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 1 |
| 01***60 | Bolt, Trunnion Cap | 3 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fan Pilot Spacer
| 62***80 | Spacer, Fan Pilot | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Flywheel
| 01***60 | Bolt (M20-1.50x60) | 9 |
| 61***20 | Washer, Plain (M20) | 9 |
| 62***20 | Bolt (M20-1.50x60) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Flywheel Housing
| 01***65 | Bolt (M18-2.50x65) | 14 |
| 01***45 | Washer,(Without R.O.P.S.) | 14 |
| 62***60 | Seal? Rear (K2) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Front Engine Support
| 62***10 | Fitting, Grease | 1 |
| 62***20 | Support, Front Engine | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Front Gear Cover
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***75 | Bolt,(For 75a Alternator) | 5 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Front Gear Train Accessory Drive
| 01***16 | Bolt,(For Slag Handling) | 6 |
| 01***90 | Bolt,For Reversible Fan | 1 |
| 01***00 | Bolt (M12-1.75x100) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Front Gear Train Accessory Drive Cover
| 01***20 | Bolt,(Used When Towing Winch) | 4 |
| 01***25 | Bolt - Rear Guard Mounting | 3 |
| 07***18 | O-Ring,(Fig.262-35)(Fig.262a-59) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Filter And Mounting
| 01***60 | Bolt (M10-1.50x60) | 1 |
| 01***45 | Bolt, Bracket Mounting | 2 |
| 60***10 | Separator, Fuel/Water (10 Micron) | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Filter Piping
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***40 | Bolt,(For Position Fixing) | 6 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 4 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Injection Piping
| 01***25 | Bolt (M6-1.00x25) | 24 |
| 01***95 | Bolt,(For Shipping) | 2 |
| 01***05 | Nut (Welded) | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Injector
| 07***21 | Seal, O-Ring | 2 |
| 62***10 | O-Ring,Nozzle Holder | 2 |
| 62***20 | Seal, O-Ring | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Piping
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***65 | Bolt (M10-1.50x65) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Pump
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 1 |
| 01***95 | Bolt,(For Reversible Fan) | 2 |
| 01***60 | Bolt (M10-1.50x160) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Fuel Pump Drive
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 8 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 8 |
| 01***13 | Nut, Regular Hexagon (M22-1.25) | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Gasket Sets
| 02***75 | O-Ring,(See Fig.A1310) | 4 |
| 07***40 | Seal, O-Ring | 1 |
| 07***12 | O-Ring,(F4350-59a1 -17 ) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Gear Housing
| 01***80 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***10 | Bolt, Mount Filler Tube | 4 |
| 07***16 | Plug, Expansion | 9 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Heat Shield
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 61***20 | Spacer,(Without Corrosion Resistor) | 8 |
| 62***80 | Shield, Heat | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Lifting Bracket
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 62***50 | Bracket, Lifting | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Lubricating Oil Cooler
| 01***12 | Bolt (M8-1.25x12) | 3 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Lubricating Oil Filter
| 01***60 | Bolt (M10-1.50x60) | 6 |
| 01***05 | Bolt (M10-1.50x105) | 4 |
| 01***75 | Bolt (M10-1.50x75) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Lubricating Oil Pump
| 01***20 | Bolt,(Forwarded Individually Parts) | 5 |
| 01***45 | Bolt (M12-2.00x45) | 2 |
| 01***80 | Bolt (M12-2.00x80) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Oil Cooler Water Plumbing
| 01***25 | Bolt - Rear Guard Mounting | 18 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 6 |
| 07***80 | Seal, O-Ring | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Oil Filler Port
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 07***10 | O-Ring,(F4320-67a0 -4 ) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Oil Level Gauge
| 07***12 | O-Ring,(Extreme Cold Terrain Spec.) (K2) | 1 |
| 07***27 | Nut, Tube | 1 |
| 61***11 | Clip | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Oil Pan
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Piston And Connection Rod
| 02***13 | Pin, Dowel | 4 |
| 04***20 | Ring, Retaining | 48 |
| 62***11 | Ring, Compression Ring - Top | 24 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Pre-Lubricating Starter Plumbing
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 2 |
| 62***10 | Switch, Relay | 1 |
| 62***10 | Clamp, Hose | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Refrigerant Compressor Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
| 62***20 | Bracket, Refrigerant Compressor | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Rocker Lever
| 01***85 | Bolt (M10-1.50x85) | 2 |
| 01***80 | Bolt (M12-2.00x80) | 12 |
| 01***80 | Bolt (M10-1.50x80) | 34 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Sensors
| 62***50 | Adapter, Plain | 1 |
| 62***20 | Harness, Wiring | 1 |
| 62***10 | Sensor, Engine Oil Pressure Assembly | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Shipping Bracket
| 01***60 | Bolt (M20-2.50x60) | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 12 |
| 62***20 | Support, Flywheel Housing | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Starter Mounting
| 62***40 | Cover, Starter Flange | 1 |
| 62***50 | Bolt (M16-2.00x45) | 3 |
| 62***60 | Bolt (M16-2.00x30) | 3 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Starting Aid Mounting
| 60***90 | Relay, Ribbon Heaters | 2 |
| 62***32 | Cover, Switch | 1 |
| 62***10 | Bracket, Switch | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Starting Motor - Pre-Lubricating Connections
| 62***20 | Seal, O-Ring | 1 |
| 62***50 | Union, Male | 1 |
| 62***20 | Union, Male | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Thermostat Housing
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***10 | Bolt (M10x1.50x10) | 3 |
| 01***25 | Bolt (M10x1.50x25) | 8 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Turbocharger
| 61***90 | Nut, Mounting | 8 |
| 62***31 | Gasket, Turbocharger | 2 |
| 62***30 | Gasket, Connection | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Turbocharger Piping
| 01***20 | Bolt,(Large Capacity Type) (Std) | 6 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***60 | Bolt (M10-1.50x160) | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Valve Cover
| 62***11 | Cover,Rocker Arm Housing | 10 |
| 62***20 | Gasket, Rocker Lever Housing | 12 |
| 62***70 | Shield, Heat | 2 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Vent Tube
| 01***10 | Bolt (M10x1.50x10) | 1 |
| 01***16 | Washer,(For Shipping Parts) | 1 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 26 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Vibration Damperer
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 61***20 | Bolt (M22-1.50x135) | 6 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Water Inlet Connection Cover
| 62***60 | Gasket, Connection | 1 |
| 62***20 | Bolt (M12-1.75x16) | 4 |
| 62***30 | Cover, Water Transfer | 1 |
Komatsu : Saa12v140z-E2-80(S/N 37209742-Up) : Engine : Water Pump
| 01***65 | Bolt (M12-1.75x65) | 4 |
| 06***06 | Bearing, Ball | 2 |
| 06***06 | Bearing, Ball | 2 |
SAA12V140Z-E2-80(S/N 37209742-UP) serial number reference
The engine data plate is a riveted metal tag on the block, usually on the left side (facing the flywheel end) near the valve cover or gear case — not on the machine's own chassis PIN plate. The plate reads the manufacturer name, the full model code (e.g. SAA12V140Z-E2-80), and the serial number in sequence; unlike whole-machine PINs there is no separate 3-letter regional/plant prefix ahead of the digits. The trailing two-digit suffix on the model code itself (here "-80") is Komatsu's factory arrangement number, marking which OEM application/accessory package the engine was built for, so read that suffix — not the numeric serial — to tell fitment variants apart.
| Prefix | Identifies | Notes |
|---|---|---|
| -80 | SAA12V140Z-E2-80, S/N 37209742-UP — turbocharged, aftercooled V12 industrial diesel from the second-generation (E2) SA12V140Z engine family, successor to the SA12V140Z-1 series | Carried in the Komatsu WA800-3LC and WA900-3LC wheel loader parts books as the power unit fitted at this serial break; this tie repeats across several independent parts-catalog listings. A shared-hardware parts cross-reference also names this arrangement specifically alongside HD785-5LC dump truck components, pointing to a common engine-compartment parts family across the WA800/WA900/HD785-5 platform, but that is not confirmed through a primary parts book excerpt — verify the exact host machine and build date with a dealer before ordering against this serial break. |
Frequently asked questions
What engine is the Komatsu SAA12V140Z-E2-80?
It's a turbocharged, air-to-air aftercooled V12 diesel displacing 30.5 L (1,861 cu in) on a 140 x 165 mm bore and stroke, rated at 603 kW (808 hp) net and 636 kW (853 hp) gross at 2000 rpm. The "-80" is the factory arrangement code marking this block as the power unit fitted to the WA800-3LC-class wheel loader; the sibling "-90" code covers the equivalent WA900-3LC.
What is the operating weight of the machine this engine powers?
The WA800-3LC-class wheel loader it powers runs about 101-102 tonnes (223,000-225,000 lb) operating weight, with the exact figure depending on bucket and undercarriage configuration. Check the machine nameplate for the confirmed figure on a given unit.
What replaced the SAA12V140Z-E2-80?
Later production of this WA800-3-generation loader carried the same rated output under the SAA12V140E-3 designation, which also equips the PC2000 excavator and HD785 truck lines. The Z-E2 itself succeeded the earlier, mechanically governed SA12V140Z-1 used on the prior WA800-2/WA900-1 loaders.
What SAA12V140Z-E2-80(S/N 37209742-UP) owners discuss
What machine does this SAA12V140Z-E2-80 arrangement actually power, and how does it differ from the -90 version people see in the same parts listings?
The -80 arrangement number ties this engine to the Komatsu WA800-3 / WA800-3LC wheel loader platform, one of Komatsu's largest quarry and mining-class loaders. The -90 arrangement is the same base SAA12V140Z-E2 engine calibrated for the larger WA900-3 / WA900L-3 chassis. Both share the 12-cylinder, 30.5 L V-block (140 mm bore x 165 mm stroke), turbocharged and aftercooled, but full-load power and cooling calibration differ by host machine. Gross output for the WA800-3 platform is reported anywhere from roughly 600 to 640 kW (800 to 855 hp) depending on source and rating method, so treat any single number as approximate and check the machine's own data plate. Don't cross-apply fuel pump calibration, governor settings, or overhaul specs between an -80 and a -90 unit — the block looks identical but the two are matched to different chassis.
How does this ZE-2 generation compare to the later common-rail SAA12V140E-3 engines that show up in the same searches?
The ZE-2 series predates Komatsu's move to electronically controlled common-rail injection, which arrived later on this same 12V140 block with the E-3 update. Mechanics who have worked on both generations describe the ZE-2 as simpler to diagnose, with fewer sensors and less sensitivity to marginal fuel quality, but with coarser throttle response, slower turbo spool-up under sudden load, and more visible exhaust smoke under acceleration than the common-rail engines that followed it. Fuel economy is also generally described as a step behind the later generation. None of that reflects a fault with the engine — it is the expected character of this mechanical-injection era of the 12V140 family.
What hydraulic and powertrain behavior is considered normal for this size of loader, and what should raise concern?
On a loader this size, boom and bucket cycle speed tracks hydraulic filter condition and oil temperature more than anything else — sluggish lift or tilt under load in dusty quarry duty is usually traced to a clogged filter or overheated oil rather than pump wear. A small amount of boom cylinder drift after sitting overnight is commonly tolerated; drift that worsens over weeks points to failing cylinder seals and should trigger a pressure and leak-down check. Torque converter response is generally described as strong and predictable; rough or delayed directional shifts more often trace back to contaminated or overheated transmission oil than to the converter itself. Any hydraulic relief-valve or pressure adjustment should be left to a qualified technician — have your dealer verify settings before the machine goes back into service.
What wear patterns show up first on this class of wheel loader — tires, axles, or linkage?
Tire wear and damage is the biggest recurring running cost owners bring up for this loader class. Large rock-service tires chunk and cut quickly in abrasive quarry or blasted-rock material, so tire compound and site material matter as much as engine condition. Axle, differential, and final-drive wear typically shows up first as elevated wear metal in an oil sample, well before any noise or heat becomes noticeable. The boom and bucket linkage on this generation uses sealed, long-interval-grease pins, which cuts down on daily greasing points but also means a worn pin or bushing announces itself as looseness or a clunk on direction change rather than an early squeak — don't skip scheduled linkage inspections just because the grease interval is long.
What electrical or sensor issues come up most for this engine and machine generation?
The recurring theme across this Komatsu generation is corroded connectors and chafed harness wiring causing intermittent monitor-panel warnings, hard starting, or unexpected shutdowns rather than an actual mechanical failure. Coolant temperature and boost or manifold pressure sensor circuits are named most often. Fouled or leaking injectors show up as rough idle, power loss, and dark exhaust smoke, usually linked to fuel quality lapses rather than injector defects. Turbocharger shaft play or an oil weep at the compressor housing is also mentioned periodically; left unaddressed it progresses to visible blue smoke and eventual compressor wheel damage. Machines fitted with an auto-lube grease system, common on this size of Komatsu iron, can develop grease pump or breather vent blockages after long idle periods, causing grease overflow or a fault indication. Sensor and wiring diagnosis is routine shop work, but turbocharger and fuel-system repairs should be confirmed by your dealer before returning the engine to heavy duty.
What should I check when buying a used machine fitted with this SAA12V140Z-E2-80 engine?
Confirm the engine arrangement plate and serial actually match the machine's original build sheet. This engine family is known to get swapped between WA800 and WA900 hosts during major rebuilds, and an -80 unit installed in a machine originally built with a -90 (or vice versa) means mismatched fuel and governor calibration even though the block looks correct. Pull an oil sample for wear metals, fuel dilution, and soot loading rather than trusting the hour meter alone. Check turbocharger shaft play and look for oil staining at the compressor housing. Inspect boom and bucket pin and bushing play, and check cylinder rods for scoring or chrome loss. Budget for tires early — tread depth and chunking on this size of rock-service tire is one of the largest line items in a used-equipment appraisal. Have a dealer or qualified technician run a full inspection and oil analysis before finalizing the purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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