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Komatsu SAA12V140Z-E2-90(S/N 37209742-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live SAA12V140Z-E2-90(S/N 37209742-UP) parts

The Komatsu SAA12V140Z-E2-90 (S/N 37209742-UP) is a heavy-duty, water-cooled, turbocharged, and aftercooled V12 diesel engine. It powers the Komatsu 330M rigid haul truck, a mechanical-drive vehicle from the Dresser/Komatsu Haulpak lineage designed for large-scale mining and quarry operations. The machine sits in the roughly 300,000 lb (136+ metric ton) gross vehicle weight class with a payload capacity of approximately 90 US tons. It drives through a torque converter and powershift transmission to a mechanical driveline and axle final drives, riding on 27.00-49 tires. The engine features mechanical jerk-pump fuel injection and lacks an electronic engine controller. This configuration represents a single running production series with incremental factory running changes rather than distinct model generations.

Across its production run, the SAA12V140Z-E2-90 saw incremental factory running changes reflected in the progression of serial ranges and shop manual codes. The machine remains relevant in the used-truck and aftermarket parts market due to its mechanical simplicity, which allows for straightforward maintenance, diagnosis with gauges, and rebuild using conventional mechanical shop practices. Buyers value the predictable rebuild costs and parts interchangeability of this generation over the electronic diagnostics of later drive-system trucks. The broad base of engine, powertrain, and axle components shared across the SA12V140Z-1 build blocks keeps this generation active in mining, quarry, and construction fleets well beyond typical service life.

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-E2-90(S/N 37209742-UP) specifications

Engine

Model	SAA12V140Z-E2-90
Configuration	V-type 12-cylinder, water-cooled, 4-cycle, turbocharged and aftercooled
Displacement	30.5 L (1,860 in³)
Bore x Stroke	140.0 mm x 165.0 mm (5.51 in x 6.50 in)
Power Output	574–603 kW (770–808 HP) @ 2,000 rpm (varies by configuration/series)
Torque	3,350–3,730 N·m (2,471–2,752 lbf·ft) @ 1,400 rpm (varies by configuration/series)
Emissions Tier	Not documented for this exact serial range — verify with your dealer

Weights

Engine Weight	Approx. 3,200 kg (7,055 lb)
Operating Weight	Not documented for this exact engine configuration — verify with dealer or shop manual
Ground Pressure	Not published

Dimensions

Engine Length	1,715–2,000 mm (varies by configuration/series)
Engine Width	1,450–1,515 mm (varies by configuration/series)
Engine Height (excluding exhaust)	1,475–2,178 mm (varies by configuration/series)
Engine Height (including exhaust)	1,592–1,874 mm (varies by configuration/series)
Transport Dimensions	Not documented for this exact engine configuration — verify with dealer or shop manual
Track Gauge / Wheelbase	Not published
Ground Clearance	Not published

Performance

Travel Speeds	Not documented for this exact engine configuration — verify with dealer or shop manual
Drive Type	Mechanical drivetrain (for SA12V140Z-1 series context)
Gradeability	Not published

Service capacities (summary)

Engine Oil (Total System)	88–132 L (23–35 US gal) (varies by configuration/series)
Engine Oil (Drain and Refill)	80–120 L (21–32 US gal) (varies by configuration/series)
Cooling System	Not documented in available sources for this engine/truck combination - verify with your dealer or the 330M OMM for the confirmed serial range.
Fuel Tank	Not documented in available sources for this specific 330M engine grouping - varies by configuration/series. Verify against the 330M OMM for the confirmed serial range.
Hydraulic System	Not documented in available sources for this specific 330M engine grouping - varies by configuration/series. Verify against the 330M OMM for the confirmed serial range.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

Komatsu SAA12V140Z-E2-90(S/N 37209742-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level on the dipstick and top up with Komatsu EO engine oil before start-up Check coolant level in the sight glass and inspect for leaks around the SA12V140Z-1 block, radiator, and hoses Drain water and sediment from the fuel tank sumps and check the fuel/water separator Walk-around the frame, dump body hoist cylinders, and body pins looking for oil weeping or loose fasteners Check tire condition and inflation on all 27.00-49 positions and inspect rims for cracks Test service brakes, park brake, and horn/backup alarm before moving the truck
Every 250 h	Change engine oil and oil filter using the specified Komatsu EO viscosity grade for ambient conditions Grease all chassis, hoist, and articulation points with G2-LI grease per the lube chart Service the engine air cleaner and check restriction indicator Check powertrain (transmission/torque converter) oil level and top up with TO10 or TO30 as specified Inspect brake cooling oil level and wet-disc brake wear indicators Check wheel-rim nut torque and axle housing oil level
Every 500 h	Replace primary and secondary fuel filters Pull oil samples from engine, powertrain, and axle housings for fluid analysis before servicing Replace hydraulic oil filter elements and inspect the hydraulic tank breather Inspect the driveline U-joints, transmission mounts, and torque converter housing for leaks Check frame rails and dump body hinge structure for cracking, especially near the hoist mounts Torque-check dump body hoist cylinder pins and steering linkage fasteners
Every 1,000 h	Change powertrain oil (TO10/TO30) and clean the transmission/torque converter suction screen Check and adjust engine valve lash on the SA12V140Z-1 (mechanical jerk-pump engine, no electronic control) Inspect the turbocharger and aftercooler for oil seepage, boost leaks, and mounting security Check front and rear axle/differential oil level and condition, top up with AXO46 or AXO80 Replace air cleaner primary and secondary elements Inspect the injection pump drive and fuel linkage for wear and correct travel
Every 2,000 h	Change hydraulic oil (HO46-HM or HO56-HE) and clean or replace the hydraulic tank strainer Change front and rear axle/final drive oil and inspect final drive planetary sets for metal in the drain Drain, flush, and refill engine coolant with Super Coolant AF-NAC or AF-ACL per the corrosion-inhibitor schedule Inspect wet-disc brake packs, calipers, and cooling oil circuit for wear beyond service limits Check steering cylinder, drag link, and kingpin wear Inspect frame, dump body, and hoist cylinder mounts with dye penetrant or visual crack check
Every 6,000 h	Evaluate the SA12V140Z-1 for a top-end or in-frame overhaul based on oil consumption, blow-by, and compression trends Pull the torque converter and transmission for internal inspection or rebuild of clutch packs and bearings Overhaul wet-disc brake assemblies and replace brake cooling oil circuit components as needed Rebuild or replace front/rear axle housings, differentials, and final drive gearing as wear dictates Inspect and, if required, rebuild the steering system pump, cylinders, and linkage Have the frame and dump body structure inspected by a qualified welder and repaired before returning to service

Servicing the SAA12V140Z-E2-90(S/N 37209742-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

With no ECM or fault codes on the SA12V140Z-1, condition monitoring runs on oil sampling, coolant testing, and gauge trends. Pull scheduled samples from the engine, torque converter, and axle housings for fluid analysis before servicing. Monitor coolant protection with Super Coolant AF-NAC or AF-ACL ahead of winter, since the mechanical injection system is sensitive to fuel waxing and cold-start fuel quality. In hot, dusty mine environments, shorten air cleaner and radiator/aftercooler cleaning intervals and check hydraulic and powertrain oil temperatures more frequently to protect the torque converter and brake cooling circuits from heat soak.

Corrective & Common Repairs

Inspect the injection pump drive and fuel linkage for wear and correct travel during 1,000-hour services. Check the turbocharger and aftercooler for oil seepage, boost leaks, and mounting security. Inspect the driveline U-joints, transmission mounts, and torque converter housing for leaks. Torque-check dump body hoist cylinder pins and steering linkage fasteners. Inspect frame rails and dump body hinge structure for cracking, especially near the hoist mounts. Verify wheel-rim nut torque and axle housing oil level to prevent catastrophic driveline failure.

Overhaul & Rebuild Points

Evaluate the SA12V140Z-1 for a top-end or in-frame overhaul based on oil consumption, blow-by, and compression trends at 6,000-hour intervals. Pull the torque converter and transmission for internal inspection or rebuild of clutch packs and bearings. Overhaul wet-disc brake assemblies and replace brake cooling oil circuit components as needed. Rebuild or replace front/rear axle housings, differentials, and final drive gearing as wear dictates. Have the frame and dump body structure inspected by a qualified welder and repaired before returning to service.

Seasonal & Environment Servicing

In cold climates, use the correct Komatsu EO viscosity grade and verify coolant protection with Super Coolant AF-NAC or AF-ACL ahead of winter. The SA12V140Z-1 mechanical injection system is sensitive to fuel waxing and cold-start fuel quality. In hot, dusty mine environments, shorten air cleaner and radiator/aftercooler cleaning intervals. Check hydraulic and powertrain oil temperatures more frequently to protect the torque converter and brake cooling circuits from heat soak. Ensure proper tire inflation on all 27.00-49 positions and inspect rims for cracks under extreme thermal cycling.

SAA12V140Z-E2-90(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-E2-90(S/N 37209742-UP) fault codes & troubleshooting

Code	Meaning	Likely cause	What to do
CA115	Engine crankshaft speed sensor and backup speed sensor failure	Faulty speed sensor, broken wiring harness, or corroded connector at the sensor pin	Inspect the sensor wiring and connector for damage or corrosion; replace the speed sensor if voltage is absent at the pin
CA111	Internal engine controller (ECM) fault	Electronic Control Module internal failure or software corruption	Replace or reprogram the ECM
CA451	Common rail pressure sensor feedback value too high	Malfunctioning rail pressure sensor or actual overpressure condition in the fuel system	Diagnose the fuel rail pressure sensor and check pump lines for blockage
CA122	Intake air pressure sensor feedback voltage too high	Faulty intake pressure sensor or wiring issue	Verify the intake pressure sensor operation and inspect the wiring harness
CA123	Intake air pressure sensor feedback voltage too low	Sensor short circuit or severe airflow restriction	Check for a sensor short or inspect the air intake system for restrictions
CA441	Battery voltage too low	Weak battery, faulty alternator, or loose connections	Replace the battery or alternator; check the voltage regulator and connections
CA442	Battery voltage too high	Faulty voltage regulator or alternator overcharging	Replace the alternator or battery; check the voltage regulator
CA234	Engine overspeed	Throttle calibration error, engine load cycle issue, or operator misuse	Verify throttle calibration and review engine load cycles
CA153	Intake air temperature sensor feedback voltage too high	Faulty Intake Air Temperature (IAT) sensor	Replace or test the IAT sensor
CA154	Intake air temperature sensor feedback voltage too low	Faulty Intake Air Temperature (IAT) sensor or short circuit	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.

SAA12V140Z-E2-90(S/N 37209742-UP) attachments & work tools

Wheel Loader Attachments

The Komatsu WA900 series wheel loader, powered by the SAA12V140Z-E2-90 engine, utilizes standard bucket configurations with capacities ranging from 11.5 to 14.5 cubic meters. These buckets are mounted via the machine's integrated quick coupler system, which allows for rapid tool changes without leaving the cab. Hydraulic flow requirements for auxiliary circuits are managed through the loader's main hydraulic pump arrangement, supporting standard grading or rock bucket geometries.

Rigid Hauler Bodies

The Komatsu 330M rigid haul truck, equipped with the SA12V140Z-1 engine variant, features a fixed, hydraulically hoisted rear-dump body designed for a payload class of approximately 90 US tons. The body construction is sized for large-scale mining and quarry hauling, with a gross vehicle weight class exceeding 136 metric tons. Guarding options include standard side skirts and rear impact protection consistent with Dresser/Komatsu Haulpak lineage specifications.

Dozer Work Tools

Komatsu D37EX-24 and D39EX-24 dozers associated with the SAA12V140Z-E2-90 engine family utilize standard straight or semi-U blades for earthmoving operations. Optional screens and sweeps packages are available for specific environmental or operational requirements. The mounting system relies on the dozer's front frame attachment points, with hydraulic lines routed through the quick-attach mechanism for blade lift and tilt functions.

Engine Fluid Specifications

For the SAA12V140Z-E2-90 and related SA12V140Z-1 engines, Komatsu specifies EO viscosity grade diesel engine oil for cold climate operations to prevent fuel waxing issues. Coolant protection requires Super Coolant AF-NAC or AF-ACL, verified for freeze point and corrosion resistance ahead of winter seasons. Hydraulic and powertrain oils must meet Komatsu Engineering Standards, with specific ISO VG grades recommended for hydraulic and axle applications.

All SAA12V140Z-E2-90(S/N 37209742-UP) assemblies by section

Every catalogued assembly group for the Komatsu SAA12V140Z-E2-90(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-E2-90(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
62***30	Seal, O-Ring	2

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Komatsu : Saa12v140z-E2-90(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
62***1A	Connection, Air Intake	2

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Air Intake Hose

67***10	Hose, Hump	8
67***20	Clamp, Spring Hose	32

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Komatsu : Saa12v140z-E2-90(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
01***32	Washer,(With Auto Emergency Steering)	32

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Komatsu : Saa12v140z-E2-90(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
62***2A	Connection, Air Transfer	1

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Komatsu : Saa12v140z-E2-90(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
12***H1	Regulator And Resistor Assembly	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Alternator - Ground Wire

Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Alternator Drive Pulley

62***10	Belt, V-Ribbed	1
62***20	Pulley, Alternator	1

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Komatsu : Saa12v140z-E2-90(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
62***20	Bolt (1/2 - 13x1 1/2 Inch)	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Cam Follower

04***12	Ring, Retaining	4
61***20	Ball	24
62***00	Lever, Cam Follower	24
62***40	Roller, Cam Follower	1

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Komatsu : Saa12v140z-E2-90(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
67***40	Bolt (M10x1.50x20)	54

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Komatsu : Saa12v140z-E2-90(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
62***20	Gear, Camshaft (Left Hand)	1

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Komatsu : Saa12v140z-E2-90(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
62***10	Seal, O-Ring	2

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Komatsu : Saa12v140z-E2-90(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
07***60	O-Ring,(Hd325?Hm400?Pc750?800)(A2041)	2

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Crankshaft

04***28	Key, Plain Woodruff	1
62***10	Bearing, Thrust (No. 4)	3
62***01	Crankshaft, Engine	1
62***40	Gear, Crankshaft	1

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Komatsu : Saa12v140z-E2-90(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
01***60	Washer,(Without Rops Guard? Canopy)	14

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Komatsu : Saa12v140z-E2-90(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
07***10	Plug, Expansion	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Engine Barring Drive

62***10	Drive, Engine Barring	1
62***20	Key, Plain Woodruff	1
62***30	Clip	1
62***40	Ring, Retaining	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Engine Complete And Service(#37211193-)

42***00	Engine, Complete And Service	1
42***01	Engine, Complete And Service	1
42***02	Engine, Complete And Service	1

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Komatsu : Saa12v140z-E2-90(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
01***00	Bolt (M10-1.50x100)	5

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Exhaust Manifold

61***50	Stud, Mounting	8
62***81	Gasket, Exhaust Manifold	12
62***31	Gasket, Turbocharger	2
62***10	Manifold,Exhaust? Front? R.H	2

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Komatsu : Saa12v140z-E2-90(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
01***08	Nut, Regular Hexagon (M10-1.50)	1

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Komatsu : Saa12v140z-E2-90(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
01***45	Bolt, Fuel Tank Mounting - Front Right	2

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Fan Pilot Spacer

62***80

Spacer, Fan Pilot

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Komatsu : Saa12v140z-E2-90(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
62***40	Gear, Flywheel Ring	1

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Komatsu : Saa12v140z-E2-90(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
62***10	Gasket, Flywheel Housing	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Front Engine Support

62***10	Fitting, Grease	1
62***20	Support, Front Engine	1

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Komatsu : Saa12v140z-E2-90(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
01***90	Bolt,For Reversible Fan	3

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Komatsu : Saa12v140z-E2-90(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
07***16	O-Ring,(F4310-54a0 -30 )	1

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Komatsu : Saa12v140z-E2-90(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
07***00	O-Ring,(For Dual Water Pump)	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Fuel Filter And Mounting(#37211193-)

01***60	Bolt (M10-1.50x60)	1
01***45	Bolt, Bracket Mounting	2
60***10	Separator, Fuel/Water (10 Micron)	2
62***5A	Bracket, Muffler	1

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Komatsu : Saa12v140z-E2-90(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
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	2

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Komatsu : Saa12v140z-E2-90(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
61***20	Spacer,(Without Corrosion Resistor)	2

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Komatsu : Saa12v140z-E2-90(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
62***40	Washer, Injector Clamping	12

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Fuel Piping(#37211193-)

01***20	Bolt,(Large Capacity Type) (Std)	2
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	8
01***65	Bolt (M10-1.50x65)	1
01***80	Bolt (M10-1.50x80)	1

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Komatsu : Saa12v140z-E2-90(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
01***00	Bolt (M10-1.50x100)	4

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Komatsu : Saa12v140z-E2-90(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
01***32	Washer,(Not Used With Emergency Str.)	8

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Komatsu : Saa12v140z-E2-90(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
07***16	O-Ring,(F4310-54a0 -30 )	1

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Komatsu : Saa12v140z-E2-90(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
61***60	Pin, Dowel	2

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Komatsu : Saa12v140z-E2-90(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
62***6A	Shield, Heat	1

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Lifting Bracket

01***40	Bolt,(Dust And Dirt Protection)	4
62***50	Bracket, Lifting	1

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Komatsu : Saa12v140z-E2-90(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
01***90	Bolt (M10-1.50x90)	4

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Lubricating Oil Filter(#37211193-)

01***60	Bolt (M10-1.50x60)	6
01***05	Bolt (M10-1.50x105)	4
01***75	Bolt (M10-1.50x75)	1
01***85	Bolt,(For Reversible Fan)	1

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Komatsu : Saa12v140z-E2-90(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
07***50	Seal, O-Ring	1

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Komatsu : Saa12v140z-E2-90(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
07***90	Seal, O-Ring	1

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Komatsu : Saa12v140z-E2-90(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
07***38	Seal, O-Ring	1

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Komatsu : Saa12v140z-E2-90(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
62***90	Bushing	1

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Komatsu : Saa12v140z-E2-90(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
07***80	O-Ring,Oil Pump	1

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Komatsu : Saa12v140z-E2-90(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
62***22	Ring, Compression Ring - 2nd	24

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Komatsu : Saa12v140z-E2-90(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
62***20	Clamp, Hose	1

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Komatsu : Saa12v140z-E2-90(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
62***20	Bracket, Refrigerant Compressor	1

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Komatsu : Saa12v140z-E2-90(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
01***20	Bolt (M12-1.75x120)	24

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Sensors

62***50	Adapter, Plain	1
62***20	Harness, Wiring	1
62***10	Sensor, Engine Oil Pressure Assembly	1
62***40	Sensor, Coolant Temperature Assembly	1

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Komatsu : Saa12v140z-E2-90(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
62***30	Bolt (M20-2.50x60)	4

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Komatsu : Saa12v140z-E2-90(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
62***90	Washer, Lock (9/16 Inch)	3

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Starting Aid Mounting

60***90	Relay, Ribbon Heaters	2
62***32	Cover, Switch	1
62***10	Bracket, Switch	1
62***20	Bolt (M10-1.50x16)	1

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Komatsu : Saa12v140z-E2-90(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
62***60	Primer, Engine Lubricating (See Fig.A6112-A7a4)	1

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Komatsu : Saa12v140z-E2-90(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
01***20	Bolt (M12x1.75x20)	12

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Turbocharger

61***90	Nut, Mounting	8
62***31	Gasket, Turbocharger	2
62***30	Gasket, Connection	2
62***40	Seal, O-Ring	1

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Komatsu : Saa12v140z-E2-90(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
01***08	Nut, Regular Hexagon (M10-1.50)	4

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Komatsu : Saa12v140z-E2-90(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
62***10	Cover, Rocker Lever	2

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Komatsu : Saa12v140z-E2-90(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
07***10	Screw, Banjo Connector (M10-1.25x20)	10

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Komatsu : Saa12v140z-E2-90(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
62***00	Damper, Vibration	1

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Komatsu : Saa12v140z-E2-90(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

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Komatsu : Saa12v140z-E2-90(S/N 37209742-Up) : Engine : Water Pump

01***65	Bolt (M12-1.75x65)	4
06***06	Bearing, Ball	2
06***06	Bearing, Ball	2
07***60	O-Ring,(F4350-59a0 -6 )	2

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SAA12V140Z-E2-90(S/N 37209742-UP) serial number reference

The PIN plate is typically riveted to the right-hand side of the cab on the lower frame, just behind the front idler or beneath the operator's window. The prefix is the first three characters of the 17-character ISO PIN found on the emissions/export plate, identifying the manufacturer and model family.

Prefix	Identifies	Notes
SAA12V140Z-E2-90	Engine Model	Komatsu SAA12V140Z-E2-90 engine. Serial range 37209742-UP. Verified by published references catalog listing for this specific engine and serial range. No other prefixes are documented for this exact engine/serial combination in the provided sources; other prefixes in the source text refer to different machine families or unrelated engine codes.

Frequently asked questions

What is the engine model for the Komatsu 330M?

The Komatsu 330M is powered by the Komatsu SAA12V140Z-E2-90 (S/N 37209742-UP), a water-cooled, turbocharged, and aftercooled V12 diesel engine with mechanical jerk-pump fuel injection.

What is the operating weight class of the Komatsu 330M?

The Komatsu 330M is built for large-scale mining and quarry hauling in the roughly 300,000 lb (136+ metric ton) gross vehicle weight class.

What replaced the Komatsu 330M?

Not documented in available public sources for this exact configuration — verify with dealer or shop manual.

What SAA12V140Z-E2-90(S/N 37209742-UP) owners discuss

What is the primary powertrain and hydraulic behavior characteristic of the Komatsu SAA12V140Z-E2-90 engine series?

The SAA12V140Z-E2-90 engine is a water-cooled, turbocharged and aftercooled V12 diesel. It utilizes a mechanical jerk-pump fuel injection system with no electronic engine controller (ECM). Power is transmitted through a torque converter and powershift transmission to a mechanical driveline and axle final drives. Hydraulic systems on machines equipped with this engine series rely on shared supply lines; if all functions (boom, arm, bucket, swing, travel) become slow simultaneously, the issue typically stems from the main hydraulic pump, engine speed, or hydraulic oil condition rather than individual cylinders or valves. Weak performance when hot but normal when cold indicates internal leakage in pumps, motors, or cylinders due to viscosity loss, not necessarily pump failure.

What are the typical undercarriage and wear patterns for machines powered by this engine series?

Machines using this engine series, such as rigid haul trucks, operate in high-dust and heavy-load environments. Undercarriage wear is accelerated by mud or debris packed into track assemblies and improper track tension. Final drives and travel motors are common wear points; grinding noises from travel motors or oil leaks from final drive seals indicate internal gear or bearing wear. Track chains and rollers require frequent inspection for elongation and binding. In cold climates, thermal cycling causes stress on frame rails and dump body hinge structures, leading to cracking near hoist mounts. Regular grease application with Komatsu Genuine G2-LI multipurpose lithium EP grease is critical for pins and bushings to prevent premature wear.

What are the known engine quirks and maintenance requirements for the SAA12V140Z-E2-90 series?

The mechanical injection system is sensitive to fuel quality and waxing in cold climates. Owners must verify coolant protection with Komatsu Super Coolant (AF-NAC or AF-ACL) ahead of winter and switch to arctic-grade engine oil (Komatsu Genuine EO) and fuel. Engine oil capacity varies by configuration/series, typically ranging from 88 to 132 liters (23-35 US gal) total, with drain-and-refill volumes of 80-120 liters (21-32 US gal). Coolant system capacity is not documented for this exact engine/truck combination in available sources; verify with the dealer or operation and maintenance manual. Fuel filters must be changed every 500 hours to protect the mechanical injection pump. Valve lash checks are required every 1,000 hours. Oil sampling is the primary diagnostic tool for predicting injector, bearing, or gear wear, as there are no fault codes.

What are the common electrical or sensor issues associated with this engine series?

The SAA12V140Z-E2-90 engine series is mechanically governed and lacks an electronic engine controller (ECM), fault-code diagnostics, or a sensor network for engine management. Therefore, it does not suffer from ECM failures or sensor-related shutdowns common in later electronic engines. Electrical issues are limited to the machine's chassis systems, such as battery state of charge, starter relay circuits, and ground connections. Intermittent starting or random shutdowns in the host machine are typically caused by unstable power supplies, corroded battery terminals, or faulty dashboard displays, not engine sensors. Condition monitoring relies entirely on oil sampling, coolant testing, and gauge trends (oil pressure, coolant temperature, torque converter oil temperature).

What specific items should be checked when buying a used machine with the SAA12V140Z-E2-90 engine?

Verify the exact serial-prefix specification sheet to confirm the installed fuel injection system (Zexel PS7S mechanical governor, Komatsu high-pressure electrohydraulic control, or Bosch full-authority electronic control), as this varies by build/serial range. Check the condition of the corrosion resistor cartridge in the coolant system, as neglect leads to internal block and head pitting. Inspect the turbocharger and aftercooler for oil seepage and boost leaks. Test the mechanical governor and injection pump linkage for wear. Check frame rails and dump body hinge structures for cracking, especially near hoist mounts. Verify the condition of the torque converter and transmission by inspecting for clutch pack wear and metal in the drain. Ensure the cooling package (radiator, hydraulic oil cooler, charge-air cooler) is free of packed debris between heat exchangers. Confirm the engine oil pressure and coolant temperature gauges are accurate and responsive.

What are the recommended fluid specifications for the SAA12V140Z-E2-90 engine and associated systems?

Engine crankcase: Komatsu Genuine EO diesel engine oil. Use EO10W30-LA or EO15W40-LA for emissions-controlled builds, or EO10W30-DH or EO15W40-DH for earlier builds. Grade selection depends on ambient temperature. Cooling system: Komatsu Super Coolant (AF-NAC or AF-ACL type), pre-mixed ethylene-glycol coolant with corrosion inhibitors, rated for protection to approximately -36°C (-33°F). Concentration must be adjusted by climate. Fuel: Ultra-low-sulfur diesel fuel meeting the engine's specification; use winter-grade blend in cold climates. Powertrain oil: Komatsu Genuine TO powertrain oil. Use TO10 (SAE 10W, API CD) for cold climates or TO30 (SAE 30W, API CD) for standard/warm climates. Hydraulic oil: Komatsu Genuine HO hydraulic oil. Use HO46-HM (ISO VG46) for standard/warm climates or HO56-HE (ISO VG56) for cold climates. Axle/Final Drive oil: Komatsu Genuine AXO axle/final-drive oil (AXO46 or AXO80, SAE 80W, API GL-4), selected by ambient temperature.

What safety-critical fixes or inspections are mandatory for this engine series?

Inspect frame, dump body, and hoist cylinder mounts with dye penetrant or visual crack check every 2,000 hours. Have the frame and dump body structure inspected by a qualified welder and repaired before returning to service if cracks are found. Verify the integrity of the cooling system under pressure to prevent catastrophic overheating. Ensure the torque converter and transmission are inspected for internal wear every 6,000 hours to prevent sudden power loss. Check the steering system pump, cylinders, and linkage for wear to maintain directional control. Have your dealer verify the exact serial range specifications and fluid capacities before performing major service or repairs.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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