Komatsuhydraulic shovels(no series)

Komatsu H185S-1(S/N G06091)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu H185S-1 is a hydraulic mining shovel engineered for high-production loading and overburden removal. The machine utilizes a diesel powertrain and operates within a weight class comparable to large mining excavators, with operating weights reaching approximately 106,700 to 109,500 kg (235,235 to 241,400 lb). Production years for this series span the era of Tier 4 interim and subsequent emissions standards. The H185S-1 lineage connects to earlier Komatsu hydraulic shovel generations and serves as a predecessor to newer mining shovel models in the Komatsu lineup. Configurations offered include backhoe and loading shovel variants, with bucket capacities ranging from 3.4 to 6.7 m³ for backhoe setups and 6.5 m³ for shovel configurations.

Across generations, Komatsu hydraulic shovels have evolved to integrate advanced telematics, improved emissions control systems, and enhanced hydraulic efficiency. The H185S-1 matters in the used and parts market because it represents a robust, heavy-duty platform with established service networks and available aftermarket support. Its design focuses on durability in challenging mining regions, making it a staple for operators requiring reliable material handling. The machine's continued presence in the secondary market is driven by its proven powertrain reliability and the availability of specialized undercarriage and cylinder components from both OEM and aftermarket suppliers.

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 H185S-1(S/N G06091) specifications

Engine

ModelNot documented for this exact serial range — verify with your dealer
Gross/Net PowerNot documented for this exact serial range — verify with your dealer
DisplacementNot documented for this exact serial range — verify with your dealer
CylindersNot documented for this exact serial range — verify with your dealer
Emissions TierNot documented for this exact serial range — verify with your dealer

Weights

Operating WeightNot documented for this exact serial range — verify with your dealer
Shipping WeightNot documented for this exact serial range — verify with your dealer
Ground PressureNot documented for this exact serial range — verify with your dealer

Dimensions

Transport LengthNot documented for this exact serial range — verify with your dealer
Transport WidthNot documented for this exact serial range — verify with your dealer
Transport HeightNot documented for this exact serial range — verify with your dealer
Track GaugeNot documented for this exact serial range — verify with your dealer
Ground ClearanceNot documented for this exact serial range — verify with your dealer

Performance

Travel SpeedNot documented for this exact serial range — verify with your dealer
Dig DepthNot documented for this exact serial range — verify with your dealer
Bucket CapacityNot documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel TankNot documented for this exact serial range — verify with your dealer
Hydraulic SystemNot documented for this exact serial range — verify with your dealer
Engine OilNot documented for this exact serial range — verify with your dealer
Cooling SystemNot 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 H185S-1(S/N G06091) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition.
  • Check hydraulic fluid level via sight glass.
  • Check coolant level and ensure cap is secure.
  • Drain water from fuel separator.
  • Check DEF level on Tier 4 machines.
  • Inspect air filter restriction indicator.
  • Check track tension and shoe/pad condition.
  • Inspect hydraulic hoses for cracks or leaks.
  • Inspect pins, bushings, and attachment points.
  • Clear debris from radiator and oil cooler fins.
  • Check for fluid leaks under the machine.
  • Verify ROPS/FOPS integrity and seat belt function.
  • Test horn, backup alarm, and lights.
  • Ensure emergency shutoff is accessible.
  • Test all controls for smooth response.
  • Check service and parking brakes.
Every 250 h
  • Change engine oil and filter.
  • Grease boom, stick, bucket, and swing bearing points.
  • Check fluid levels across all systems.
  • Inspect air cleaner element.
  • Inspect belts, hoses, and clamps.
  • Perform visual walk-around inspection.
Every 500 h
  • Replace fuel filter.
  • Replace hydraulic return filter.
  • Perform battery load test and clean terminals.
  • Test coolant SCA concentration.
  • Collect KOWA hydraulic oil sample.
  • Measure undercarriage wear.
Every 1,000 h
  • Collect hydraulic oil sample.
  • Change final drive oil on both sides.
  • Inspect turbocharger.
  • Take wear measurements on critical components.
  • Check valve adjustment.
  • Perform structural inspection of boom and stick welds.
Every 2,000 h
  • Change hydraulic system oil.
  • Flush and replace coolant.
  • Service transmission.
  • Perform comprehensive component evaluation.
  • Inspect and service KDPF system.
  • Inspect and service SCR system.

Servicing the H185S-1(S/N G06091) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize KOWA fluid analysis at every major service interval to monitor engine wear metals, hydraulic particle counts, and coolant SCA concentration. Track hydraulic viscosity changes and oxidation levels to predict pump and valve health. Monitor DEF levels and KDPF status via KOMTRAX telematics to manage emissions system uptime. Analyze final drive oil for gear wear indicators. Use these data points to schedule fluid changes and component replacements before failure occurs, ensuring optimal machine performance and longevity.

Corrective & Common Repairs

Address hydraulic hose leaks and cracked fittings promptly to prevent system contamination and pressure loss. Replace worn track shoes, sprockets, and idlers to maintain proper track tension and reduce undercarriage stress. Inspect and replace worn boom, stick, and bucket pins and bushings to restore linkage geometry. Check engine air filter restriction and replace elements to prevent turbocharger damage. Repair or replace faulty sensors and solenoid valves to resolve intermittent fault codes and restore control system responsiveness.

Overhaul & Rebuild Points

Plan major overhauls for the hydraulic pump and swing machinery based on wear measurements and oil analysis trends. Rebuild or replace final drive units when oil contamination or gear wear exceeds limits. Inspect and repair boom and stick welds during structural inspections to prevent catastrophic failure. Overhaul engine injectors and turbochargers if performance drops or fuel efficiency declines. Replace all hydraulic seals and hoses during major fluid changes to ensure system integrity and prevent cross-contamination.

Seasonal & Environment Servicing

In cold climates, verify coolant freeze protection and use appropriate grade engine oil and hydraulic fluid. Clear debris from radiator and oil cooler fins regularly to prevent overheating in dusty or hot environments. Inspect undercarriage components for wear caused by abrasive materials. Check battery health and charging system in extreme temperatures. Ensure DEF system is protected from freezing and contamination. Adjust track tension for varying ground conditions to maximize traction and minimize wear.

H185S-1(S/N G06091) common service parts

Part numberPart
692 306By-Pass - Oil Filter Cartridge, Diesel EngineCheck fitment →
358 601 40Return Oil Filter, AssemblyCheck fitment →
461 724 40Contact ElementCheck fitment →
324 376 40H.P. Filter, AssemblyCheck fitment →
202 702 40Sealing ElementCheck fitment →

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H185S-1(S/N G06091) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor failureBroken sensor, wiring issue, or connector corrosionReplace the speed sensor and verify voltage at the pin connector
CA111Internal engine controller faultECM hardware or software failureReplace or reprogram the ECM
CA451Common rail pressure sensor feedback value too highMalfunction in the rail sensor or actual overpressure conditionDiagnose the fuel rail pressure sensor or pump lines
CA441Battery voltage too lowWeak battery or charging system failureReplace the alternator or battery; check the voltage regulator
CA442Battery voltage too highAlternator overcharging or regulator failureReplace the alternator or battery; check the voltage regulator
CA122Intake air pressure high voltageSensor malfunction or wiring issueVerify the intake pressure sensor and wiring
CA123Intake air pressure low voltageSensor short or airflow restrictionCheck for a sensor short or an airflow restriction
CA153Intake air temperature sensor error (high)Sensor failureReplace or test the IAT sensor
CA154Intake air temperature sensor error (low)Sensor failureReplace or test the IAT sensor
CA234Engine overspeedThrottle calibration error, engine load cycle issue, or operator misuseVerify throttle calibration, engine load cycle, or operator misuse

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

H185S-1(S/N G06091) attachments & work tools

Standard Loading Shovel Bucket

The H185S-1 is configured as a mining hydraulic shovel, typically equipped with a large-capacity loading bucket designed for top-loading haul trucks. Factory specifications for this class indicate bucket capacities in the range of 15 to 20 cubic meters (19.6 to 26.2 cubic yards), varying by configuration and series.

Backhoe Attachment

The H185S-1 platform supports a backhoe configuration for general excavation tasks, distinct from the primary mining shovel setup. This attachment requires specific hydraulic circuitry and mounting hardware to interface with the machine's main control valves.

Coupler and Mounting System

The machine utilizes a heavy-duty pin-and-bushing or hydraulic quick-coupler system for rapid tool changes between shovel and backhoe configurations. Mounting interfaces are engineered to handle high impact loads and are specific to the H185S-1 boom geometry.

Hydraulic Kit Requirements

Switching between shovel and backhoe tools requires a dedicated hydraulic kit to redirect flow to the appropriate auxiliary circuits. These kits include necessary hoses, valves, and control modifications to ensure proper tool operation and pressure settings.

Factory Guarding and Protection

Komatsu offers factory-installed guarding options for the H185S-1, including wear plates, side cutters, and boom protection to extend component life in abrasive mining environments. These options are integrated into the machine's design to maintain structural integrity and balance.

All H185S-1(S/N G06091) assemblies by section

Every catalogued assembly group for the Komatsu H185S-1(S/N G06091). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

* = Variations From Page:
Komatsu : H185s-1(S/N G06091) : * = Variations From Page :
Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Accumulator
00***98Test Socket2
18***40Pressure Relief Valve1
21***99Pipe ? 20x75 Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Distane Plate Between Motor And Gear Box
00***98Grease Nipple32
08***40Quick Disconnect Coupling1
08***40Protection Cap1
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Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Generator
49***40Diesel Engine1
69***73Seal Ring4
69***73Water Pump1
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Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Magn. Pick-Up For Indicator
05***40Grommet8
05***40Grommet1
30***40Operation Panel, Part 2 (W/O Electric Appliances)1
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Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Measuring Transducer With Shift Outlet For Indicator
05***40Grommet8
05***40Grommet1
30***40Operation Panel, Part 2 (W/O Electric Appliances)1
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Komatsu : H185s-1(S/N G06091) : * = Variations From Page : : Revolution Meter
05***40Grommet8
05***40Grommet1
30***40Operation Panel, Part 2 (W/O Electric Appliances)1
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Air Condit. System, Heater
Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : -Compressor
25***40Compressor, Assembly1
69***73Upstroke Valve1
69***73Valve1
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Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : -Coupling
32***99Threaded Pin1
33***99Nut8
49***40Clutch Assembly1
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Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : -H.P. Filter
00***98O - Ring1
00***98O-Ring1
32***40H.P. Filter, Assembly1
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Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : Cab Heater Arr.
25***40Breather Up To 06 1222
25***40Hose Fittings, Straight2
25***40Moulding Material Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : Compressor Drive, Air Conditioning
00***98Screw Retention4
00***98Plate Ring4
18***40Connection Plate1
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Komatsu : H185s-1(S/N G06091) : Air Condit. System, Heater : Hydr. For Air Conditioning System
00***98Test Socket1
00***98Union1
18***40Pressure Relief Valve1
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Annex
Komatsu : H185s-1(S/N G06091) : Annex : Colour Basic Machine : Chrome Yellow
Komatsu : H185s-1(S/N G06091) : Annex : Electric Schematics :
Komatsu : H185s-1(S/N G06091) : Annex : Hydraulic Schematics :
Komatsu : H185s-1(S/N G06091) : Annex : Tools And Accessories
Backhoe Equipment
Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Backhoe
49***40Digging Tooth4
49***40Key4
49***40Catch4
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Basic Boom Cylinder
31***99Bolt4
38***40Quad Seal Ring1
54***40Connector Plate1
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Boom
00***98Mounting Clip6
00***98Mounting Clip3
00***98Mounting Clip4
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Bucket Cylinder
00***98Seal Ring1
30***99Cover Plate8
31***99Bolt (Standard)16
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Hydr. Cylinder
00***98Grease Nipple3
00***98O-Ring1
22***40Support Ring1
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Steering And Rod
00***98Grease Nipple5
21***40Bolt Lock6
26***40Stripper6
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Stick
00***98Mounting Clip2
00***98Mounting Clip1
00***98Clamp2
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Komatsu : H185s-1(S/N G06091) : Backhoe Equipment : Stick Cylinder
00***98O-Ring1
30***40Weld On Angle1
30***40Connecting Block1
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Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Basic Boom
00***98Mounting Clip6
00***98Mounting Clip8
00***98Mounting Clip9
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Basic Boom Cylinder
26***40Connecting Block1
30***99Cover Plate6
31***99Bolt8
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Bucket Cylinder
00***98O-Ring1
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required1
26***40Connecting Block1
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Bullclam Bucket
00***98Grease Nipple2
00***98Half Flange16
00***98Half Flanged2
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Bullclam Bucket Stick
00***98Mounting Clip10
00***40Clamp5
00***98Mounting Clip2
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Hydr. Cylinder
00***98Grease Nipple3
00***98O-Ring1
22***40Support Ring1
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Komatsu : H185s-1(S/N G06091) : Bullclam Bucket Equipment : Stick Cylinder
00***98O-Ring1
30***40Connecting Block1
30***99Cover Plate2
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Drive
Komatsu : H185s-1(S/N G06091) : Drive
Komatsu : H185s-1(S/N G06091) : Drive : -Air Cleaner
33***99Nut20
34***99Washer20
34***99Lock Washer20
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Komatsu : H185s-1(S/N G06091) : Drive : -Coupling
30***99Bolt10
30***99Screw26
34***99Dowel Sleeve24
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Komatsu : H185s-1(S/N G06091) : Drive : -Diesel Engine
49***40Diesel Engine1
69***73Seal Ring4
69***73Water Pump1
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Komatsu : H185s-1(S/N G06091) : Drive : -Double Pump
46***40Double Pump Assembly1
69***81Roller Bearing4
69***73Seal Kit, Front Pump Fig-Nos: 03,05,07,081
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Komatsu : H185s-1(S/N G06091) : Drive : -Engine Control Unit
46***40Rubber Block Support, Engine Monitor4
50***98Nut8
69***53Hose Nw 5 Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Drive : -Hydr. Pump
00***98O-Ring2
17***40Screw Plug2
17***40Union3
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Komatsu : H185s-1(S/N G06091) : Drive : -Pump
18***40Shaft Seal No Field Repair Item1
31***99Screw7
31***99Socket Head Cap Srew1
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Komatsu : H185s-1(S/N G06091) : Drive : -Pump Distributor Gear
00***98O-Ring1
08***54O-Ring2
08***21O-Ring2
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Komatsu : H185s-1(S/N G06091) : Drive : -Radiator
21***99Radiator Hose ? 12 Bulk Ware, State Length Required2
21***99Radiator Hose ? 50 Bulk Ware, State Length Required10
30***99Bolt24
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Komatsu : H185s-1(S/N G06091) : Drive : Air Cleaning System
14***40Maintenance Switch2
22***40Accordion Hose1
22***40Accordion Hose2
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Komatsu : H185s-1(S/N G06091) : Drive : Cold Start System
28***40Bracket1
30***99Screw4
33***99Nut4
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Komatsu : H185s-1(S/N G06091) : Drive : Engine Assy.
24***40Rail (Cold Weather Design)4
26***40Strip6
26***40Cover Tube For Sensor1
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Komatsu : H185s-1(S/N G06091) : Drive : Engine : Cummins-Diesel
Komatsu : H185s-1(S/N G06091) : Drive : Exhaust System
26***40Compensator L=230mm2
30***99Bolt2
30***99Bolt8
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Komatsu : H185s-1(S/N G06091) : Drive : Fan Drive
00***98Locking Plate1
26***40Washer, Up To 06 1081
26***40Spacer Block1
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Komatsu : H185s-1(S/N G06091) : Drive : Fuel Lines
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required0
25***40Socket, From S/No: 06 0851
25***40Screwed Fittings1
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Komatsu : H185s-1(S/N G06091) : Drive : Fuel Tank
08***40Quick Disconnect Coupling1
08***40Protection Cap1
16***40Screw Plug1
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Komatsu : H185s-1(S/N G06091) : Drive : Generator Arr.
50***98Nut1
50***98Bolt1
50***40Bushing1
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Komatsu : H185s-1(S/N G06091) : Drive : Output :
Komatsu : H185s-1(S/N G06091) : Drive : Pump With Pump Distributor Gear Arr.
08***40Quick Disconnect Coupling1
08***40Protection Cap1
30***99Screw7
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Komatsu : H185s-1(S/N G06091) : Drive : Radiator Arr.
00***98Clamp4
00***98Union1
08***40Quick Disconnect Coupling1
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Komatsu : H185s-1(S/N G06091) : Drive : Serial-No. :
Komatsu : H185s-1(S/N G06091) : Drive : Series :
Komatsu : H185s-1(S/N G06091) : Drive : Type :
Electric
Komatsu : H185s-1(S/N G06091) : Electric : -Head Light
00***98Bolt2
34***99Lock Washer2
35***40Headlamp, Without Lamp1
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Komatsu : H185s-1(S/N G06091) : Electric : Batteries With Cables
14***40Cable Shoe8
15***40Battery Switch2
30***99Screw4
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Komatsu : H185s-1(S/N G06091) : Electric : Horn, Illumination
25***40Compressor-Single Ton-Horn Consist. Of Fig.-No: 03-051
27***40Compressor-Two Ton-Horn Consist. Of Fig.-No: 05-081
30***99Bolt 20 mm Lg4
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Komatsu : H185s-1(S/N G06091) : Electric : Illumination On Option
00***98Clamp 15/1560
05***40Cable Protection Hose Pg 7 Bulk Ware, State Length Required0
05***40Bulb 40 W5
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Komatsu : H185s-1(S/N G06091) : Electric : Standard Lighting Equipment
00***98Clamp 15/15100
05***40Cable Protection Hose Pg 7 Bulk Ware, State Length Required0
05***40Socket 2-Polig5
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Komatsu : H185s-1(S/N G06091) : Electric : Ventilation, Switch Cabinet
26***40Air Cleaner, Cabin Supercharger1
29***40Gill Breather1
30***99Bolt4
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General View
Komatsu : H185s-1(S/N G06091) : General View : General View Backhoe Equipment
Komatsu : H185s-1(S/N G06091) : General View : General View Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06091) : General View : General View Undercarriage
Komatsu : H185s-1(S/N G06091) : General View : Machine-Maintenance Parts
26***40Drive Belt, Fan - Radiator1
50***98Adhesive Lubrication Spray0
69***08Flat Belt (Generator)1
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Hydraulic
Komatsu : H185s-1(S/N G06091) : Hydraulic : -Aeration Filter
33***99Nut1
44***40Aeration Filter, Assembly1
69***89Socket Housing1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Anticavitation Valve
00***98O-Ring1
13***40O-Ring1
46***40Anticavitation Valve Assembly1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Control Block
16***40Release Valve3
31***99Eye Bolt2
31***99Bolt24
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Control Valve, Load Limit
25***40Control Valve, Load Limit Assembly. 30 Bar1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Filter
00***98O - Ring1
00***98O-Ring1
35***40Filter, Assembly1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -H.P. Filter
31***99Screw4
34***99Lock Washer4
34***40Gasket1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Hydr. Motor
31***99Screw2
31***99Screw4
32***40Hydraulic.-Motor, Assembly1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Pressure Relief Valve
10***65O-Ring1
32***40Pressure Relief Valve, Assembly. Without Pressure Adjustment1
50***98O-Ring1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Pressure Sequence Stage
10***65O-Ring1
49***40Pressure Sequence Stage Assembly1
50***98O-Ring1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Regulating Valve
31***99Screw1
34***99Circlip1
34***99Lock Washer1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Return Oil Filter
10***65O-Ring1
33***99Nut2
33***99Nut1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Slew-Brake Valve
00***98O-Ring2
25***40Valve Disk4
25***40Compression Spring4
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Komatsu : H185s-1(S/N G06091) : Hydraulic : -Throttle Check Valve
00***98O-Ring2
18***40O-Ring1
31***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Arr. Control Blocks And Manifold
15***40Test - Screw Coupling6
30***99Bolt (Standard)6
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Arr. Control Blocks And Manifold (Backhoe)
15***40Test - Screw Coupling6
30***99Bolt (Standard)6
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Control Blocks - Manifold
31***99Bolt (Standard)96
35***40Flange Seal24
50***98Flange24
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Control Plate
00***98Test Coupling5
00***98Test Coupling1
00***98Union4
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Header (Return)
00***98Half Flange12
00***98Flange Seal6
17***40Screw Plug2
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Lines And Valves For Oil Cooler
00***98Half Flange2
00***98Union1
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Lines :
Komatsu : H185s-1(S/N G06091) : Hydraulic : Main Oil Tank
00***98O-Ring5
00***98Union2
00***98Union1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Manifold
31***99Socket Head Cap Screw64
33***99Nut28
35***40Flange Seal30
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Manifold (Backhoe)
00***98Union6
15***99Test Socket5
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Manifold (Bullclam Bucket)
00***98Half Flange2
00***98Union4
00***98Union2
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Oil Cooler Arr.
25***40Hv-Washer20
30***99Bolt (Standard)10
30***99Screw40
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Pressure Line - Pilot Oil Pump And Load-Sensing
00***98Union1
25***40Hose Nw 20x Ca. 1500 mm Bulk Ware, State Length Required0
27***40Socket2
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Pump Control
00***98Socket4
15***40Test - Screw Coupling1
18***40Screw Plug2
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Pump Lubrication
00***98Half Flange2
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required0
25***40Socket, From S/No: 06 0854
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Pumps - Control Blocks
15***40Test - Screw Coupling3
30***99Bolt2
31***99Socket Head Cap Screw48
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Rotary Joint
00***98Socket1
30***99Bolt8
31***99Socket Head Cap Screw16
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Slew Gear
00***98Union1
26***40Hose Nw 10x Ca. 8000 mm Bulk Ware, State Length Required0
27***40Socket2
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Suction Lines
00***98O-Ring1
00***98Half Flange2
00***98Flange Seal1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Suction Tank
00***98Seal Ring1
08***40Quick Disconnect Coupling1
08***40Protection Cap1
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Komatsu : H185s-1(S/N G06091) : Hydraulic : Valves For Control Blocks
00***98Test Coupling1
00***98Union7
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
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Lubrication- And Refueling Equipment
Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : -Lube Filter
41***40Lube Filter Assembly., 6-Fold1
69***32Ring6
69***33Union To The Lube Filters6
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : -Lube Pump
49***40Central Lubrication Assembly., 1-Line1
69***67Hose, Assembly. Nw 13x1520 Lg1
69***71Release Valve1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : -Metering Valve
26***40Metering Valve, Assembly1
26***40Metering Valve, Assembly1
27***40Metering Valve, Assembly1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : -Pump
69***94Valve Cap1
69***95Gasket1
69***96Valve Kit1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Boom - Backhoe Equipment - Lube Lines, 10 M
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
21***99Pipe ? 16x50 Lg. Bulk Ware, State Length Required0
30***99Screw2
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Boom - Lube Lines Bullclam
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
21***99Pipe ? 16x50 Lg. Bulk Ware, State Length Required0
28***40Reducing Socket4
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Central Lubrication-Bullclam
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
26***40Hose Ca. 3100 Lg. Bulk Ware, State Length Required0
30***99Screw16
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Drip Lube Pump Arr.
00***98Pin3
20***40Coupler Plug Nw 12.51
20***40Coupling Sleeve Nw 12.51
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Dropping Lubrication Assy.
00***98Test Union1
21***99Pipe, Assembly. ? 25 Bulk Ware, State Length Required0
21***99Pipe ? 10x1000 Lg. Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Electr. Parts
04***40Dust Cap3
04***40Plug3
14***40Socket3
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Hand Operated Lube Arr.
00***98Grease Nipple34
00***98Union34
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Hydr. For Drip Lubrication
00***98Test Coupling1
20***40Screw Plug1
25***40Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Hydr. For Lube Arr.
00***98Test Coupling1
20***40Screw Plug1
25***40Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Lube Distributor Swing Ring
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
21***99Pipe ? 10x1000 Lg. Bulk Ware, State Length Required0
26***40Hose Assembly. Nw 20x2750 mm1
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Lube Pump Arr.
00***98Pin3
20***40Coupler Plug Nw 12.51
20***40Coupling Sleeve Nw 12.51
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Refueling Equipment
08***40Counter Part To Fig-No. 201
25***40Housing, Empty1
25***40Hose Nw 20x Ca. 1500 mm Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Stick - Backhoe Equipment - Lube Lines
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
26***40Nipple3
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Lubrication- And Refueling Equipment : Stick - Lube Lines Bullclam
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
26***40Hose Ca. 3100 Lg. Bulk Ware, State Length Required0
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Operator'S Cab
Komatsu : H185s-1(S/N G06091) : Operator'S Cab : -Operator'S Cab
00***98Es-Pin2
00***98Es-Pin1
05***40Grommet2
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : -Operator'S Seat
30***99Bolt2
31***99Screw4
34***99Washer6
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : -Pilot Oil Unit
25***40Pilot Oil Unit Assembly1
30***99Screw To Valve Y11d+Y1202
31***99Screw2
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Cab Support
25***40Hv-Washer8
30***99Bolt6
30***99Bolt1
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Cabin Supercharger
26***40Air Cleaner, Cabin Supercharger1
30***99Bolt3
30***99Bolt2
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Colour :
Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Glazing
08***40Clamping Section 2800 Lg. (To Fig-Nos. 02,04) Bulk Ware, State Length Required0
08***40Filler Section 3000 Lg. Bulk Ware, State Length Required0
30***40Rear Window 803x4581
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Operation Panel
05***40Grommet8
05***40Grommet1
30***40Operation Panel, Part 2 (W/O Electric Appliances)1
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Operator'S Stand
05***40Grommet1
30***99Bolt 20 mm Lg4
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Opertaor'S Cab Arr.
08***40Mirror2
11***40Mirror Bracket, R.H1
16***40Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required1
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Protection Roof
30***99Screw8
30***99Bolt Standard4
31***99Washer4
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Komatsu : H185s-1(S/N G06091) : Operator'S Cab : Windscreen Washing Assy.
05***40Wiper Motor 120?1
19***40Diaphragm Pump1
19***40Water Reservoir1
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Superstructure
Komatsu : H185s-1(S/N G06091) : Superstructure : Covering, Engine Housing
08***40Silent Block1
30***99Bolt1
30***99Bolt3
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Komatsu : H185s-1(S/N G06091) : Superstructure : Fire Wall
26***40Cellular Rubber 10x130x250 Bulk Ware, State Length Required0
30***99Screw8
33***99Nut16
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Komatsu : H185s-1(S/N G06091) : Superstructure : Pin, Boom - Counterweight
26***40Washer8
30***99Bolt1
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Superstructure : Rails And Platforms
26***40Hose Dn 50x10000 Lg. Bulk Ware, State Length Required1
27***40Grating 420x16501
27***40Grating1
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Komatsu : H185s-1(S/N G06091) : Superstructure : Telescopic Steps Arr. And Ladders
11***99Cable Clamp2
18***40Limit Switch1
30***99Bolt1
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Swing Ring
Komatsu : H185s-1(S/N G06091) : Swing Ring : -Brake
31***99Screw Plug8
34***99Seal Ring8
34***99Circlip1
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Komatsu : H185s-1(S/N G06091) : Swing Ring : -Hydr. Motor
25***40Plug1
31***99Screw M8 X 2014
31***99Bolt8
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Komatsu : H185s-1(S/N G06091) : Swing Ring : -Slew Gear
00***98Union1
00***98Union1
21***99Precision Tubing 10x1.5 Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Swing Ring : Swing Ring And Swing Gear Box Arr.
00***98Grease Nipple32
08***40Quick Disconnect Coupling1
08***40Protection Cap1
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Switch- And Junction Boxes
Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Cables - Oil Tank And Switch
00***98Clamp 15/1520
05***40Cable Lug, Red15
05***15Cable Protection Hose Ca. 4000 mm Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Cables Control Blocks
32***40Cable Union Pg 918
35***40Cable Protection Hose Pg 9x***00 Lg. Bulk Ware, State Length Required0
35***40Cable Protection Hose Pg 13.5 Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Cables Control Frame
00***98Clamp 10/1520
32***40Emergency Push Button1
32***40Cable Union Pg 96
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Cables Engine, Cu, Ktta
00***98Clamp 15/1520
05***40Rubber Grommet4
05***40Plug 3-Polig1
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Electric, Cab Support
04***40Dust Cap1
04***40Plug1
05***40Flanged Socket1
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Engine Switch Box X4
05***40Cable Shoe, Red20
05***40Cable Lug (M6)5
05***40Ground Wire - Series Terminal4
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : General View
Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Junction Box (Cab Support) X11
05***40Ground Wire - Series Terminal3
25***40Housing, Empty1
32***99Screw2
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Junction Box Filter Frame X5
05***40Ground Wire - Series Terminal3
25***40Housing, Empty1
31***99Screw4
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Junction Box Oil Tank X3
05***40Ground Wire - Series Terminal5
25***40Housing, Empty1
32***99Screw6
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Junction Box, Control Blocks X6
05***40Ground Wire - Series Terminal10
25***40Housing, Empty1
32***99Screw6
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Komatsu : H185s-1(S/N G06091) : Switch- And Junction Boxes : Main Switch Box X2
05***40Ground Wire - Series Terminal18
08***40Double-Bit Key ? 3.20
16***40Double-Bit Key ? 5.20
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Undercarriage
Komatsu : H185s-1(S/N G06091) : Undercarriage : -Brake
00***98Shaft Seal2
31***99Plug9
33***99Seal Ring9
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Komatsu : H185s-1(S/N G06091) : Undercarriage : -Gear
00***98Shaft Seal2
08***95Shaft Seal2
30***99Bolt12
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Komatsu : H185s-1(S/N G06091) : Undercarriage : -Motor
25***40Plug1
31***99Screw M8 X 2014
31***99Bolt8
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Bottom Roller
30***99Bolt8
32***40Plug1
32***40Plug1
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Hydr. Tensioner
25***40Test-Screw Coupling1
25***40Seal Ring1
32***40Rod Guide Ring7
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Hydraulic
Komatsu : H185s-1(S/N G06091) : Undercarriage : Idler Assy.
30***99Screw8
31***40Axle Stirrup4
31***99Washer8
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Rotary Joint
16***40Screw Plug4
20***40Screw Plug2
30***99Bolt4
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Side Frame
22***40Lifetime Seal4
25***40Hv-Washer80
30***99Bolt16
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Top Roller
31***99Plug1
34***99Dowel Pin2
42***40Pin1
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Track Adjuster
00***98Test Socket2
18***40Pressure Relief Valve1
21***99Pipe ? 20x75 Bulk Ware, State Length Required0
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Track Group
34***99Washer368
42***40Track Group Incl. Fig-Nos: 11-15 800 Breit Einschl1
42***40Track Group (Cold Weather Design) Incl. Fig-Nos: 11-15 800 Breit1
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Travelling Brake
21***99Pipe, Assembly. ? 15x60 Bulk Ware, State Length Required0
37***99Union1
37***99Pipe Connection2
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Komatsu : H185s-1(S/N G06091) : Undercarriage : Undercarriage
00***98Union2
30***99Bolt8
31***99Socket Head Cap Screw16
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H185S-1(S/N G06091) serial number reference

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

PrefixIdentifies
G06091H185S-1

Frequently asked questions

What engine does the Komatsu H185S-1 use?

The Komatsu H185S-1 uses a Komatsu diesel engine. Specific engine model and tier vary by production year and regional emissions requirements.

What is the operating weight of the Komatsu H185S-1?

The operating weight ranges from 106,700 to 109,500 kg (235,235 to 241,400 lb), varying by configuration and attachment package.

What model replaced the Komatsu H185S-1?

The H185S-1 is part of the Komatsu hydraulic shovel lineage. Successor models include newer generations in the Komatsu mining shovel series, such as the PC8000 series and other advanced hydraulic mining excavators.

What H185S-1(S/N G06091) owners discuss

What are the typical powertrain and hydraulic behaviors observed in the Komatsu H185S-1 series?
The H115S-1 series is characterized by smooth hydraulic operation and high fuel efficiency. A known failure pattern involves the hydraulic pump and engine failing in close succession, which negatively impacts resale value. Operators should monitor for slow movements or reduced power, which often indicate airflow restrictions, injector wear, or failing fuel delivery components rather than immediate pump failure. If all hydraulic functions become slow simultaneously, the issue likely stems from the main hydraulic pump, engine performance, or pressure regulation rather than individual cylinders. Weak performance when hot but normal when cold suggests internal leakage in the pump, main control valve, or cylinders due to decreased oil viscosity at operating temperature. The line is generally designed to wear out complete machines simultaneously rather than individual components wearing gradually.
What undercarriage and wear patterns are typical for this machine type?
Components such as bushings, bearings, and track pads are subjected to significant wear and tear. Worn bushings lead to noise and vibration, while worn bearings cause premature track failure. The undercarriage is designed to wear out as a complete system rather than individual parts failing in isolation. Track tension should be monitored regularly, as repeated loosening indicates issues with the adjuster or undercarriage components. Mechanical resistance from mud or debris packed into the undercarriage can cause the machine to pull to one side or travel unevenly. Proper track tension and roller condition are critical to prevent uneven wear and premature failure.
What engine quirks are associated with the Komatsu H185S-1 series?
Engine performance issues are a primary concern, including loss of power under load, increased fuel consumption, and overheating. Overheating may indicate a blocked cooling package, including the radiator, hydraulic oil cooler, charge-air cooler, or air conditioning condenser. Air entering the fuel supply, clogged fuel filters, or a restricted fuel tank vent can cause starting difficulties or power loss. The engine may drop heavily in RPM when hydraulics are used if the hydraulic system places excessive load or if the engine cannot produce expected power. Intermittent starting, dashboard failure, or random shutdowns may signal electrical issues affecting the engine control system. Regular inspection of the cooling system and fuel filters is essential to prevent these issues.
What are common electrical and sensor issues reported by owners?
Komatsu excavators rely heavily on electronic control systems, meaning a single faulty sensor or unstable power supply can trigger multiple warning signals. Common electrical issues include intermittent starting, dashboard failure, and random machine shutdowns. Owners often report difficulty diagnosing these issues without access to detailed electrical and hydraulic schematics. Faulty batteries, damaged engine components, and inadequate cooling systems can also contribute to electrical system failures. Regular inspection of the power supply, sensor functionality, and control panel operation is recommended to resolve electromechanical issues.
What should be checked when buying a used H185S-1(S/N G06091)?
Verify the exact serial-prefix specification sheet and installed attachment package, as configurations vary by serial range. Check the hydraulic oil level and condition, ensuring it meets the correct specification. Inspect the undercarriage for wear, track tension, and roller condition. Test the engine for proper starting, power under load, and absence of overheating. Verify the functionality of all hydraulic functions, both cold and hot, to detect internal leakage. Check for fault codes and ensure the dashboard and electrical systems are operating correctly. Inspect the cooling package for blockages and ensure the fan operates properly. Confirm the condition of bushings, bearings, and track pads. Review maintenance records for regular fluid changes and filter replacements.
What safety-critical fixes require dealer verification?
Swing brake release system and swing hold position issues require dealer verification. Have your dealer verify the swing brake mechanism and mechanical play to ensure the upper structure holds position safely. Additionally, any issues related to the main safety valve or hydraulic system pressure regulation should be verified by your dealer to ensure safe operation.

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

Serial-range & configuration variants

This page covers the Komatsu H185S-1(S/N G06091). Related factory variants of the same model family:

H185S-1(S/N G06123)H185S-1(S/N G06081)H185S-1(S/N G06085)H185S-1(S/N G06128)H185S-1(S/N G06098)H185S-1(S/N G06120)H185S-1(S/N G06121)H185S-1(S/N G06122)

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