Komatsuengine(no series)

Komatsu 6D95L-1AC-TR(S/N 96999-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live 6D95L-1AC-TR(S/N 96999-UP) parts

The Komatsu 6D95L-1AC-TR engine (S/N 96999-UP) is a 5.0L inline-six turbocharged diesel unit designed for heavy-duty construction applications. It powers the Komatsu PC200-6 and PC200LC-6L excavator series, which are mid-size crawler excavators with operating weights ranging from approximately 20,000 to 22,000 lb (9,100 to 10,000 kg). Production for this engine serial range corresponds to the late 1990s to early 2000s era, succeeding the 6D95L-1A series (S/N 10001-UP) and preceding the SAA6D95LE-1 series. Configurations offered include standard and tropical/sandy environment variants, with the TR suffix denoting specific regional emissions and cooling package adjustments for the PC200-6 platform.

Across the 6D95L generation, changes primarily involved emissions compliance updates and cooling system optimizations for tropical climates, distinguishing the 1AC-TR from earlier 1A and 1AA variants. The machine remains critical in the used and parts market because the PC200-6 series is a high-volume workhorse in global secondary markets. Its simple mechanical fuel injection and robust block design allow for extensive rebuildability, making the 6D95L-1AC-TR a preferred donor engine for excavators, dozers, and industrial generators where Tier 1/Stage II reliability is valued over complex electronic management.

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 6D95L-1AC-TR(S/N 96999-UP) specifications

Engine

Model	6D95L-1AC-TR
Series	95 Series
Configuration	Turbocharged, aftercooled
Displacement	4.890 L (298.4 cu in)
Cylinders	6, in-line
Bore	95 mm (3.74 in)
Stroke	115 mm (4.53 in)
Emissions Tier	Not documented for this exact serial range — verify with your dealer

Weights

Operating Weight	Not documented for this exact serial range — verify with your dealer
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	Not documented for this exact serial range — verify with your dealer
Transport Width	Not documented for this exact serial range — verify with your dealer
Transport Height	Not documented for this exact serial range — verify with your dealer
Track Gauge	Not documented for this exact serial range — verify with your dealer
Ground Clearance	Not documented for this exact serial range — verify with your dealer

Performance

Travel Speed	Not documented for this exact serial range — verify with your dealer
Gradeability	Not documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel Tank	Not documented for this exact serial range — verify with your dealer
Hydraulic System	Not documented for this exact serial range — verify with your dealer
Engine Oil	Not documented for this exact serial range — verify with your dealer
Cooling System	Not documented for this exact serial range — verify with your dealer

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

Komatsu 6D95L-1AC-TR(S/N 96999-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level and condition Check hydraulic fluid level at sight glass Check coolant level and ensure cap is secure Check fuel level and drain water from separator Check DEF level on Tier 4 machines Check air filter restriction indicator
Every 250 h	Change engine oil and filter Grease all points (boom, stick, bucket, swing bearing) Check fluid levels Check air filter element Inspect belts and hoses Perform visual walk-around inspection
Every 500 h	Replace fuel filter Replace hydraulic return filter Service battery and test terminals Test coolant SCA concentration Collect KOWA oil sample Perform detailed undercarriage inspection
Every 1,000 h	Collect hydraulic oil sample Change final drive oil Inspect turbocharger Measure component wear Check valve adjustment Inspect structural components
Every 2,000 h	Change hydraulic oil Flush and replace coolant Service transmission Perform comprehensive component evaluation Inspect KDPF (at 4,500h) Check SCR system maintenance

Servicing the 6D95L-1AC-TR(S/N 96999-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize KOWA fluid analysis at every 500-hour interval to monitor wear metals (iron, copper, lead) and contaminants (silicon, sodium) in the 6D95L-1AC-TR engine. Check hydraulic oil particle count and viscosity to protect the PC200-6 pump and valve bank. Test coolant SCA concentration every 500 hours to prevent cavitation in the inline-six cylinder block. Monitor DEF levels daily on Tier 4 variants to ensure SCR system efficiency. Track KOMTRAX telematics data for load frequency and fuel burn anomalies to predict turbocharger or injector degradation before failure occurs.

Corrective & Common Repairs

Address common 6D95L-1AC-TR issues by inspecting the mechanical fuel injection pump for leakage and verifying injector nozzle spray patterns. Check the turbocharger shaft play and housing for oil leaks, a frequent failure point in high-hour PC200-6 units. Inspect the cylinder head gasket for coolant loss or compression leakage, particularly in tropical TR configurations prone to overheating. Replace worn rocker arms and valve lifters if valve clearance exceeds factory specs. Diagnose electrical faults using Komatsu fault codes for E02 (EPC system) or E11 (engine control failure) to isolate sensor or wiring harness issues in the undercarriage-mounted control box.

Overhaul & Rebuild Points

Plan the 6D95L-1AC-TR overhaul when compression drops below specification or oil consumption exceeds 1 liter per 10 hours. Measure cylinder bore wear and crankshaft journal diameter to determine if machining or sleeving is required. Replace piston rings, liners, and main bearings during a full rebuild. Inspect the cylinder block for cracks near the coolant passages, common in older PC200-6 engines. Verify the turbocharger and fuel injection pump calibration during reassembly to restore rated power of 81 kW at 2,000 RPM. Use a complete overhaul kit to ensure proper clearances for the 102 mm bore and 110 mm stroke.

Seasonal & Environment Servicing

For the 6D95L-1AC-TR tropical configuration, inspect the radiator and oil cooler fins daily for debris buildup that restricts airflow in high-heat environments. Use Komatsu Super-coolant AF-NAC to prevent scaling and corrosion in humid conditions. Check the air cleaner pre-cleaner and outer element frequently in dusty or sandy sites to prevent premature engine wear. In cold climates, verify the battery load capacity and use appropriate grade engine oil to ensure cold-start reliability. Inspect all rubber hoses and belts for UV degradation, as tropical sun exposure accelerates aging in the PC200-6 engine compartment.

6D95L-1AC-TR(S/N 96999-UP) common service parts

Part number	Part	Notes
07281-00197	Clamp,(With Pre-Fuel Filter)	Fuel system service	Check fitment →
600-311-7440	Cartridge,Fuel Filter	Fuel system service	Check fitment →
6206-73-6200	Fuel Filter Ass'Y	Fuel system service	Check fitment →
09637-30161	Plate? Instruction,Air Cleaner (Single Element)	Air intake service	Check fitment →
07000-02135	O-Ring,Hydraulic Oil Filter	Hydraulic service	Check fitment →

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6D95L-1AC-TR(S/N 96999-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
CA451	Common rail pressure sensor feedback value too high	Malfunction in the rail sensor or actual overpressure condition	Diagnose the fuel rail pressure sensor or pump lines
CA441	Battery voltage too low	Alternator failure, battery degradation, or loose connections	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 engine load cycle
AA10NX	Air cleaner clogging	Dirty or blocked air filter element	Replace the air filter
CA122	Intake air pressure high voltage	Sensor malfunction or wiring issue	Verify the intake pressure sensor and wiring
CA123	Intake air pressure low voltage	Sensor short or airflow restriction	Check for a sensor short or an airflow restriction
CA111	Internal engine controller fault	ECM internal abnormality	Replace or reprogram the ECM
CA442	Battery voltage too high	Alternator overcharging or voltage regulator failure	Replace the alternator or battery; check the voltage regulator
CA153	Intake air temperature sensor high error	Sensor malfunction	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.

6D95L-1AC-TR(S/N 96999-UP) attachments & work tools

Excavator Attachments

The Komatsu 6D95L-1AC-TR engine (S/N 96999-UP) powers the PC200-6 and PC200LC-6L excavator classes. Typical work tools include standard digging buckets, heavy-duty rock buckets, and trenching buckets. Bucket capacities for this class generally range from 0.8 to 1.2 cubic meters (0.9 to 1.6 cubic yards), varying by configuration and series. These machines utilize a standard quick-attach coupler system for rapid tool changes. Hydraulic flow requirements for auxiliary circuits vary by configuration/series; verify specific flow rates with your dealer for high-demand tools like breakers or hammers.

Dozer Attachments

The 6D95L-1AC-TR engine is also used in the D61PX-15 and similar dozer models. Standard work tools include straight blades, angle blades, and semi-U blades. Blade widths typically range from 3.0 to 3.5 meters (10 to 12 feet), with capacities varying by configuration and series. The mounting system is a fixed drawbar or semi-universal mount depending on the specific dozer variant. Guarding options include side cutters, corner cutters, and blade edge protectors for heavy-duty applications. Hydraulic controls for blade tilt and angle are standard on most configurations.

Grader Attachments

The 6D95L-1AC-TR engine is specified for the GD511A-1 motor grader. Primary work tools include the moldboard blade, ripper, and scarifier. Blade widths for this class are approximately 3.0 to 3.3 meters (10 to 11 feet). The moldboard is mounted on a center pivot and side-shift mechanism. Ripper shanks are typically single or multi-shank configurations, with penetration depths varying by configuration and series. Guarding options include blade edge protectors and ripper shank tips. Hydraulic adjustments for blade pitch and tilt are standard.

Forklift Attachments

The 6D95L-1AC-TR engine is used in Komatsu FD35, FD40, and FD45 forklift models. Standard work tools include standard forks, side shifters, and rotators. Fork lengths typically range from 1.2 to 1.5 meters (4 to 5 feet), with capacities varying by configuration and series. The mounting system is a standard carriage mount. Guarding options include overhead guards and load backrests. Hydraulic flow requirements for rotators and side shifters vary by configuration/series; verify specific flow rates with your dealer.

All 6D95L-1AC-TR(S/N 96999-UP) assemblies by section

Every catalogued assembly group for the Komatsu 6D95L-1AC-TR(S/N 96999-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine

Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Air Cleaner(#100413-)

04***10	Ring,See Fig. K4010-65a0	1
07***09	Clamp,(With Cylinder Cover)	2
60***11	Washer,Seal (K26)	2
60***80	Valve	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Air Intake(#100413-)

01***10	Bolt (M10x1.50x10)	4
01***30	Screw	11
01***85	Bolt	1
02***04	Plug,(For Shipping)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Alternator (13a) (With Non Hardening Pulley) (Inner Parts)(#100413-)

60***60	Alternator A. (13a),(With Non Hardening Pulley)	1
KD***31	Bushing,Insulator	2
KD***80	Packing	1
KD***71	Cover	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Alternator Mounting (13a) (With Non Hardening Pulley)(#100413-)

01***50	Bolt	1
01***40	Bolt,(Shim 3-Piece)	1
01***20	Bolt,(For Japan Pc200)	2
01***45	Bolt	2

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Camshaft And Tappet

01***20	Screw	2
04***16	Fitting Wedge	1
06***06	Bearing	1
62***31	Thrust Washer	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cooling Fan

01***45	Bolt	6
01***30	Screw	6
60***20	Fan,Cooling	1
62***20	Spacer	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cooling Fan (Reversible Fan Type)

01***45	Bolt	6
01***30	Screw	6
60***10	Fan,(Reversible Type)	1
60***20	Plate,(For Reversible Fan)	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Crank Pulley (Hardening Pulley) (For 13a Alternator)

01***45	Bolt,Nylock	1
61***20	Collar,Taper	1
61***31	Plate	1
62***50	Pulley? Hardening	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Crankshaft

62***00	Main Metal Ass'Y	7
62***00	Thrust Metal Ass'Y	1
62***00	Main Metal Ass'Y	7
62***00	Thrust Metal Ass'Y	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cylinder Block

01***16	Screw	4
04***20	Pin,Dowel (Welded)	2
04***28	Pin, Dowel - Transmission Case, Pin-Dowel	2
04***08	Adapter Sleeves	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cylinder Block Gasket Kit

07***05	O-Ring,(Not Used With Emergency Str.) (K2)	2
07***35	O-Ring,Hydraulic Oil Filter	1
07***50	O-Ring,Front Cover Plate	1
07***12	Gasket,Mechanical Pump Piping	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cylinder Head

01***32	Washer, (Without Emergency Steering)	25
02***04	Plug, Pipe	1
07***08	Plug, Expansion	6
07***10	Plug, Expansion	13

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Cylinder Head Gasket Kit

08***14	Band,(For Additional Fuel Strainer)	2
08***19	Band,(Without Air Conditioner)	2
61***30	Gasket,Air Cleaner	1
61***80	Gasket,Exhaust Manifold	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Damper

01***16	Bolt,(With Alternator Cover Type)	6
62***00	Damper,(Except Japan Pc200)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Engine Mounting

01***45	Bolt,(For Power Tilt Mech Angle)	6
01***55	Bolt, Mount Tube To Switch Pump	5
01***35	Bolt, Bolt, Mount Tubes To Switch And Work Pumps	2
01***40	Bolt,(With Service Valve R.H.)	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Exhaust Manifold

01***25	Grub Screw	4
01***45	Bolt, Bracket Mounting	12
61***50	Nut	4
62***10	Manifold,Exhaust	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Flywheel

01***30	Bolt	6
06***04	Bearing,Ball	1
62***10	Washer	1
62***92	Gear,Ring	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Flywheel Housing

01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	11
07***15	Plug	1
61***32	Seal? Rear (K2)	1
62***12	Flywheel Housing A	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Front Cover

01***16	Bolt	2
01***16	Screw	3
01***65	Bolt,(For 35a? 25a Alternator)	15
01***70	Bolt,(For 50a Alternator)	2

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Front Hanger (For 13a? 25a Alternator)

01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2
62***50	Hanger,Front (With Tension Pulley)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Front Power Take Off

06***07	Bearing	1
06***08	Bearing,Ball	1
07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***12	Elbow	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Filter (For 13a? 25a Alternator)

01***85	Bolt	2
01***15	Bolt,(With Water Separator)	2
01***16	Washer,(With Water Separator)	2
07***12	Gasket,(Without Air Compressor Type) (K1)	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump (Feed Pump) (Without Stop Motor) (Inner Parts)(#100413-)

DK***20	Bolt, Joint	1
DK***00	Valve,Check	2
DK***10	Feed Pump Ass'Y,(Not Shown)	1
DK***20	Pump,Priming	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Without Stop Motor) (Inner Parts)(#100413-)

Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Without Stop Motor) (Inner Parts)(#100413-)

DK***40	Gasket,Air Compressor	2
DK***00	Nut,Cap	1
DK***20	Cover	1
DK***40	Bolt	2

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Without Stop Motor) (Inner Parts)(#100413-)

62***52	Injection Pump Ass'Y	1
DK***30	Key,Woodruff	1
DK***30	Bearing	0
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Without Stop Motor) (Inner Parts)(#100413-)

DK***40	Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040	0
DK***90	Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590	0
DK***00	Sleeve,Control	6
DK***20	Plunger Ass'Y	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump Lubricator

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
62***30	Pipe,Oil	1
62***50	Connector	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Injection Pump Mounting (Without Stop Motor)(#100413-)

01***35	Grub Screw	4
01***12	Bolt,(See Fig.0501)	1
01***16	Bolt,(With Alternator Cover Type)	1
01***20	Bolt,(For Japan Pc200)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Fuel Return (For 13a? 25a Alternator) (For 15a Alternator With Water Separator)

01***16	Bolt,(With Alternator Cover Type)	1
01***50	Bolt,(For Shipping)	1
04***10	Clip,(With Accumulator)	2
07***05	Tube	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Head Cover

01***20	Bolt,(For Japan Pc200)	1
04***50	Screw	4
07***09	Clamp,(See Fig. K0210-16a0)	2
07***80	Clamp, Drain Hose	3

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Heater Switch

01***12	Bolt	2
01***20	Bolt,(For Japan Pc200)	2
01***25	Bolt,(With Corrosion Resistor)	1
08***14	Clip,(Without Ripper Point Light)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Holder (Inner Parts)

62***10	Holder Ass'Y	6
DK***00	Shim? 0.75mm	0
DK***00	Shim? 1.200mm	0
DK***00	Shim? 0.875mm	0

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Idler Gear

01***75	Bolt - Cab To Rops	1
04***20	Ring, Snap	1
06***06	Bearing	2
61***20	Washer	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Injection Nozzle

01***35	Bolt, Mount Bracket To Floor	6
07***00	Clip	11
62***10	Carrier	6
62***30	Washer	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Injection Piping

01***25	Screw	4
61***30	Clip	1
62***00	Clip Ass'Y	4
62***20	Clamp	4

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Muffler (With Spark Arrester Catalyzer Type)(#100413-)

01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2
01***16	Screw	1
01***16	Bolt,(With Alternator Cover Type)	1
07***25	Hose	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Name Plate And Caution (English)

09***61	Plate? Instruction,Air Cleaner (Single Element)	1
60***30	Plate? Caution,Oil Filter And Bypass Filter	1
60***20	Plate? Caution,(English)(Not Shown)	1
62***10	Plate? Name,(Limited Supply) (English)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Oil Filter

60***41	Cartridge,Engine Oil Filter (D31s)	1
60***42	Cartridge,Engine Oil Filter	1
62***10	Nipple	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Oil Level Gauge(#100413-)

01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1
01***20	Screw	1
01***06	Nut	1
01***10	Washer,See Fig. K4010-12a0	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Oil Pan And Suction Tube(#100413-)

01***16	Bolt, Mount Solenoid Valve	30
01***12	Bolt,(See Fig.0501)	1
01***16	Screw	1
07***16	Gasket,(For Pc750-6) (See Fig.A2110)	2

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Oil Pump

01***16	Screw	4
01***25	Bolt,(With Corrosion Resistor)	1
62***10	Valve	1
62***30	Washer	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Piston

04***12	Ring, Snap	12
62***02	Piston Ring Ass'Y,Per Cylinder	6
62***10	Pin,Piston	6
62***01	Connecting Rod Ass'Y	6

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Rear Hanger

01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2
62***60	Hanger,Rear	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Rocker Arm

01***65	Bolt,(For Alternator Bracket Mount)	8
61***30	Circlip	2
62***20	Spring	5
62***10	Arm,Rocker	12

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Spare Parts (For 25a Alternaotr Reversible Fan Type) (For 13a Alternator)(#100413-)

04***32	V-Belt,(For Trimming Dozer)	1
04***53	V-Belt,(For Add. Air Compressor)	1
07***16	Gasket,(For Pc750-6) (See Fig.A2110)	1
60***41	Cartridge,Engine Oil Filter (D31s)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Starting Motor (5.5kw) (Inner Parts)(#100413-)

60***50	Starting Motor Ass'Y,(5.5kw)	1
KD***00	Bracket,Rear	1
KD***20	Spring,Brush	1
KD***10	Field Coil Ass'Y	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Starting Motor Mounting (5.5kw)(#100413-)

01***30	Bolt	2
07***05	O-Ring,(Not Used With Emergency Str.) (K2)	1
(6***0)	Starting Motor Ass'Y,(5.5kw) (See Fig.A6210-B0a5)	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Tension Pulley (For 13a Alternator)

01***12	Bolt	4
01***25	Bolt,(With Corrosion Resistor)	1
01***65	Bolt,(With Water Separator)	1
01***06	Nut	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Water Pump

01***16	Screw	5
01***20	Screw	2
01***75	Bolt,(For Shipping)	4
07***12	Plug,(Without Corrosion Resistor)	2

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Water Pump (For Reversible Fan)

01***16	Screw	5
01***20	Screw	2
01***75	Bolt,(For Shipping)	4
04***20	Ring, Retaining	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Water Pump Pulley (Hardening Pulley) (For Trimming Dozer) (High Altitude Spec.)(#100413-)

04***32	V-Belt,(For Trimming Dozer)	1
04***53	V-Belt,(For Add. Air Compressor)	1
62***60	Pulley? Hardening	1

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Komatsu : 6d95l-1ac-Tr(S/N 96999-Up) : Engine : Water Separator (For 13a? 25a Alternator)

6D95L-1AC-TR(S/N 96999-UP) serial number reference

The engine serial plate is riveted to the left side of the engine block, typically near the injection pump or valve cover. The prefix is the alphanumeric engine model code (e.g., 6D95L-1AC-TR) stamped on the plate, distinct from the machine chassis PIN.

Prefix	Identifies	Notes
6D95L-1AC-TR	Trimming Dozer	S/N 96999-UP. Confirmed in parts catalog listings for cylinder block and overhaul kits. Single-source confirmation required for specific trim configuration details.

Frequently asked questions

What is the engine specification for the Komatsu 6D95L-1AC-TR?

The Komatsu 6D95L-1AC-TR is a 5.0L inline-six turbocharged diesel engine with a bore of 102 mm and stroke of 110 mm. It produces approximately 81 kW (109 hp) at 2,000 RPM and is used in the PC200-6 and PC200LC-6L excavator series.

What is the operating weight of the machine powered by this engine?

The Komatsu PC200-6 and PC200LC-6L excavators powered by the 6D95L-1AC-TR engine have operating weights ranging from approximately 20,000 to 22,000 lb (9,100 to 10,000 kg), depending on the configuration, counterweight, and attachment package.

What engine replaced the 6D95L-1AC-TR?

The 6D95L-1AC-TR was succeeded by the SAA6D95LE-1 series engine, which introduced electronic fuel injection and higher emissions compliance (Tier 2/Stage II) for later model year excavators. The SAA6D95LE-1 is part of Komatsu's transition to electronically managed powertrains in the PC200-7 and subsequent generations.

What 6D95L-1AC-TR(S/N 96999-UP) owners discuss

What is the displacement and configuration of the Komatsu 6D95L-1AC-TR engine?

The engine is a 5.0 L (305 cu in) in-line 6-cylinder diesel. It is turbocharged and mechanically injected. The bore and stroke are approximately 102 mm × 110 mm (4.02 in × 4.33 in). The engine weighs approximately 600–800 kg (1,323–1,764 lb). The 6D95L-1AC-TR variant is specifically designated for trimming dozers and falls under the S/N 96999-UP range for the 6D95L-1AC series. Note that the 6D95L-1AC-TR is distinct from the 6D95L-1AC-E and 6D95L-1AC-P variants, which share the same serial prefix but differ in application and emissions configuration.

What are the known powertrain and hydraulic behaviors for machines using this engine series?

Machines equipped with the 6D95L-1AC series often exhibit hydraulic weakness when hot due to decreased oil viscosity revealing internal leakage in pumps, main control valves, or cylinders. If all hydraulic functions (boom, arm, bucket, swing, travel) become slow simultaneously, the issue typically lies in the shared hydraulic supply, pump control, or engine performance rather than individual cylinders. Engine power loss under load is frequently caused by restricted air filters, clogged fuel filters, or blocked charge-air hoses. A machine that pulls to one side during travel should first be checked for mechanical resistance, track tension, and debris packing before diagnosing travel motors or final drives.

What undercarriage or wear patterns are typical for this machine type?

Undercarriage wear patterns are heavily influenced by the machine's application, particularly for trimming dozers which often operate in tight, abrasive environments. Track tension must be monitored regularly, as tracks that repeatedly loosen indicate issues with the adjuster or component wear. Uneven track wear or pulling to one side can result from mismatched track-chain conditions, roller wear, or debris packed into the undercarriage. Ground pressure and track shoe width significantly affect wear rates in heavy production or mining applications.

What are the common engine quirks per the 6D95L-1AC series?

The 6D95L-1AC series is a Tier 1/Stage II compliant engine. A common quirk is the sensitivity of the mechanical injection system to air entering the fuel supply, which can cause hard starting or power loss. The engine relies on precise valve timing and fuel system diagnostics for optimal performance. Over- or under-torquing of cylinder head bolts, crankshaft mains, connecting rods, and rocker arms during reassembly is a frequent cause of premature failure. The cooling system is prone to clogging between stacked heat exchangers (radiator, hydraulic oil cooler, charge-air cooler), leading to overheating during heavy excavation if not cleaned regularly.

What are the common electrical/sensor issues?

Electrical issues often manifest as multiple fault codes or sudden derating. Common causes include weak batteries that show acceptable voltage until loaded, poor engine and chassis grounds, and corroded connectors. The monitor and controller wiring is susceptible to short circuits, which can damage electronic components. Fault codes related to engine derating require checking the exact warning and codes, as they may indicate aftertreatment or sensor issues. Battery load testing is critical, as voltage collapse during starting can mimic starter failure.

What fluids are recommended for the Komatsu 6D95L-1AC-TR engine and its systems?

Komatsu recommends specific fluids for optimal performance. Diesel engine oil should meet Komatsu specifications. Hydraulic oil must be the correct specification to prevent viscosity-related leakage issues. Coolant should be Komatsu Super-coolant AF-NAC. Axle oil and powertrain oil must also meet Komatsu standards. Using the correct fluid specifications is critical for maintaining engine life and hydraulic system integrity.

What to check when buying a used 6D95L-1AC-TR(S/N 96999-UP) machine?

When purchasing a used machine with this engine, verify the exact serial number to confirm it is within the 96999-UP range for the 6D95L-1AC series and not a different variant like the 6D95L-1AC-E or 6D95L-1AC-P. Check the engine for signs of overheating, such as coolant expulsion or pressurization issues. Inspect the hydraulic system for weakness when hot, which indicates internal leakage. Test the undercarriage for uneven wear and track tension issues. Verify the battery and electrical connections for corrosion or weakness. Check the cooling package for debris between heat exchangers. Ensure the fuel system is free of air leaks and that filters are in good condition. Have your dealer verify the engine's compliance with local emissions regulations and the integrity of the mechanical injection system.

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

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