Komatsu H185S-1(S/N G06128)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu H185S-1 is a large hydraulic mining shovel designed for high-production overburden removal and loading applications. The machine utilizes a Komatsu diesel engine, with specific power output reaching 485 kW (651 HP) at 1,800 rpm for larger variants in the series. Operating weights for the H185S series range from 106,700 kg to 109,500 kg depending on the specific configuration and bucket size. Production of the H185S-1 series occurred during the transition period of Komatsu's hydraulic shovel lineup, serving as a successor to earlier H-series models and preceding the modern PC-series mining excavators. Configurations offered include backhoe and loading shovel setups, with bucket capacities varying from 3.4 m³ to 6.7 m³ for backhoe operations and up to 6.5 m³ for shovel configurations.
Across the H185S series generations, Komatsu implemented significant updates to hydraulic pump and valve combinations to improve fuel efficiency and operational smoothness. The H185S-1 generation is critical in the used and parts market because it represents a mature platform where component wear patterns are well-documented, yet original equipment is becoming scarce. The machine's heavy-duty undercarriage and cylinder assemblies are frequently rebuilt by aftermarket specialists, driving demand for specific wear parts. Its relevance today stems from its continued use in mining environments where reliability is paramount, and the availability of specialized cylinder repair services and undercarriage components ensures its extended lifecycle despite the introduction of newer, larger mining excavators.
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 G06128) specifications
Engine
| Model | Not documented for this exact serial range — verify with your dealer |
| Gross/Net Power | Not documented for this exact serial range — verify with your dealer |
| Displacement | Not documented for this exact serial range — verify with your dealer |
| Cylinders | Not documented for this exact serial range — verify with your dealer |
| 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 |
| Dig Depth | 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 H185S-1(S/N G06128) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the H185S-1(S/N G06128) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals and hydraulic oil particle counts. Track hydraulic viscosity changes and water content to prevent pump cavitation. Monitor coolant pH and SCA concentration levels to protect the engine block and radiator from corrosion. Analyze final drive oil for gear wear indicators. Use KOMTRAX telematics to track load frequency and fault codes, allowing for proactive intervention before component failure occurs during high-stress mining cycles.
Corrective & Common Repairs
Address frequent hydraulic hose failures by inspecting for abrasion near the boom and stick joints. Replace worn cylinder seals on the boom, stick, and bucket to prevent external leaks and pressure loss. Repair or replace damaged track shoes and sprockets to maintain proper tension and reduce undercarriage stress. Fix intermittent electrical faults caused by corroded connectors in the ECM or sensor circuits. Replace worn swing bearing components to eliminate excessive play and noise during rotation.
Overhaul & Rebuild Points
Rebuild the main hydraulic pump and control valves when flow rates drop below specification or internal leakage increases. Overhaul the swing machinery when bearing clearance exceeds limits or gear teeth show pitting. Rebuild the final drives when oil contamination levels rise despite changes or torque output decreases. Replace the engine injectors and turbocharger components when power output falls below 485 kW (651 HP) or fuel consumption increases significantly. Rebuild the undercarriage when roller and idler wear limits are reached to prevent track derailment.
Seasonal & Environment Servicing
In cold climates, verify DEF fluid levels and ensure the heating system functions to prevent crystallization. Use low-temperature hydraulic oil to maintain pump viscosity during startup. In dusty environments, clean the air filter outer element more frequently and check the restriction indicator often. Inspect the radiator and oil cooler fins for debris buildup that restricts airflow. Protect hydraulic lines from extreme cold by ensuring proper insulation and using compatible seals. Monitor coolant glycol content to prevent freezing in the cooling system.
H185S-1(S/N G06128) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 693 587 | Fuel Filter Cartridge With Separator | Fuel system service | Check fitment → |
| 694 402 | Element, Generator Set Air Conditioning Equipment Pilot Oil Pump | Air intake service | Check fitment → |
| 692 306 | By-Pass - Oil Filter Cartridge, Diesel Engine | Lubrication service | Check fitment → |
| 988 779 | Oil Filter Cartridge, Diesel Engine | Lubrication service | Check fitment → |
| 358 601 40 | Return Oil Filter, Assembly | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
H185S-1(S/N G06128) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA441 | Battery voltage too low | Weak battery or charging system failure | Replace the battery or alternator and check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator | Replace the alternator or battery and check the voltage regulator |
| 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 |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@HANS | Hydraulic oil overheating | Contaminated oil, clogged filter, or cooler fan failure | Change hydraulic filter and oil and check the cooler fan |
| B@BCNS | Engine coolant overheating | Low coolant level, blocked radiator fins, or fan belt issue | Check radiator fins, fan belt, and coolant level |
| E10 | Engine controller power failure | ECM power connection issue, blown fuse, or ground wire fault | Inspect ECM power connections, fuses, or ground wires |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| CA111 | Internal engine controller fault | ECM internal hardware failure | Replace or reprogram the ECM |
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 G06128) attachments & work tools
Loading Shovels
The H185S-1 is a large mining hydraulic shovel designed for high-production loading. Factory configurations typically include a heavy-duty boom and stick assembly optimized for digging and loading overburden or ore into haul trucks.
Bucket / Work Tool
Standard loading shovel buckets for this class typically range from 15 to 25 cubic meters (19.6 to 32.8 cubic yards). The bucket is mounted via a proprietary Komatsu quick-coupler or pin-on system, requiring specific hydraulic lines for latch operation.
Backhoe / Digging Configurations
While primarily a shovel, the H185S-1 series supports backhoe configurations for specific mining or heavy excavation tasks. These setups utilize a different boom and stick arrangement and require a dedicated hydraulic kit for swing and stick control.
Hydraulic Kits & Couplers
Attachment compatibility relies on factory-installed hydraulic couplers and quick-connect kits. Specific hydraulic flow rates and pressure settings must match the tool requirements; variations exist by configuration/series depending on the specific boom and stick geometry.
Engine & Powertrain
The H185S-1(S/N G06128) utilizes a Komatsu diesel engine. Specific engine model and horsepower ratings vary by configuration/series and regional emissions requirements; verify the exact engine designation on the machine's data plate or in the operation and maintenance manual.
Undercarriage & Track Shoes
Komatsu hydraulic shovels of this size class use heavy-duty track shoes designed for mining environments. Boundary Equipment and other suppliers offer replacement top rollers and track shoes optimized for the H185S-1 series to improve reliability in challenging conditions.
Cylinder & Component Upgrades
Aftermarket suppliers like Bridge Machine offer improved clam, bucket, stick, and boom cylinders for Komatsu hydraulic shovels. These components are designed to resolve common failure patterns and extend service life in high-stress mining applications.
All H185S-1(S/N G06128) assemblies by section
Every catalogued assembly group for the Komatsu H185S-1(S/N G06128). 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 G06128) : * = Variations From Page :
Komatsu : H185s-1(S/N G06128) : * = Variations From Page : : Accumulator
| 00***98 | Test Socket | 2 |
| 15***40 | Test - Screw Coupling | 2 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : * = Variations From Page : : Aux. Grating For Fuel Tank
| 27***40 | Grating 420x1650 | 1 |
| 27***40 | Grating | 1 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06128) : * = Variations From Page : : Bullclam Bucket Wear Package
| 00***98 | Grease Nipple | 2 |
| 00***98 | Half Flange | 16 |
| 00***98 | Half Flange | 2 |
Komatsu : H185s-1(S/N G06128) : * = Variations From Page : : Diaphragm-Type Accumulator
| 00***98 | Test Socket | 2 |
| 15***40 | Test - Screw Coupling | 2 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : * = Variations From Page : : Generator
| 51***40 | Generator 24 V / 100 A | 1 |
| 63***40 | Diesel Engine Assembly | 1 |
| 69***73 | Seal Ring | 4 |
Air Condit. System, Heater
Komatsu : H185s-1(S/N G06128) : Air Condit. System, Heater : -Heater
| 46***40 | Heat Exchanger | 1 |
| 51***40 | Heater Consist. Of Fig-Nos: 02-08 | 1 |
| 69***73 | Tab 4-Pole | 1 |
Komatsu : H185s-1(S/N G06128) : Air Condit. System, Heater : Cab Heater Arr.
| 14***40 | Vent Valve From 06123 | 2 |
| 25***40 | Breather Up To 06 122 | 3 |
| 25***40 | Hose Fittings 90? | 1 |
Komatsu : H185s-1(S/N G06128) : Air Condit. System, Heater : Compressor Drive, Air Conditioning
| 03***99 | V-Belt - Set | 1 |
| 25***40 | Solenoid Clutch | 1 |
| 29***40 | Console | 1 |
Annex
Komatsu : H185s-1(S/N G06128) : Annex : Colour Basic Machine :
Komatsu : H185s-1(S/N G06128) : Annex : Display Schematic :
Komatsu : H185s-1(S/N G06128) : Annex : Electric Schematics :
Komatsu : H185s-1(S/N G06128) : Annex : Hydraulic Schematics :
Komatsu : H185s-1(S/N G06128) : Annex : Tools And Accessories
Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Basic Boom 5,5 M
| 00***98 | Mounting Clip | 6 |
| 00***98 | Mounting Clip | 8 |
| 00***98 | Mounting Clip | 9 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Basic Boom Cylinder
| 26***40 | Connecting Block | 1 |
| 30***99 | Cover Plate | 6 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Bucket Cylinder
| 00***98 | O-Ring | 1 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 1 |
| 26***40 | Connecting Block | 1 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Bullclam Bucket
| 00***98 | Grease Nipple | 2 |
| 00***98 | Half Flange | 16 |
| 00***98 | Half Flange | 2 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Bullclam Bucket Stick 4,3 M
| 00***98 | O-Ring | 12 |
| 30***99 | Bolt Pin Lock From S/No: 06 120 | 12 |
| 30***99 | Cover Plate | 24 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Hydr. Cylinder
| 00***98 | O-Ring | 1 |
| 00***98 | Grease Nipple | 3 |
| 20***40 | O-Ring | 1 |
Komatsu : H185s-1(S/N G06128) : Bullclam Bucket Equipment : Stick Cylinder
| 00***98 | O-Ring | 1 |
| 30***40 | Connecting Block | 1 |
| 30***99 | Cover Plate | 2 |
Drive
Komatsu : H185s-1(S/N G06128) : Drive
Komatsu : H185s-1(S/N G06128) : Drive : -Air Cleaner
| 33***99 | Nut | 20 |
| 34***99 | Washer | 20 |
| 34***99 | Lock Washer | 20 |
Komatsu : H185s-1(S/N G06128) : Drive : -Coupling
| 30***99 | Bolt | 10 |
| 30***99 | Screw | 26 |
| 34***99 | Dowel Sleeve | 24 |
Komatsu : H185s-1(S/N G06128) : Drive : -Diesel Engine
Komatsu : H185s-1(S/N G06128) : Drive : -Double Pump
| 46***40 | Double Pump Assembly | 1 |
| 69***81 | Roller Bearing | 4 |
| 69***73 | Seal Kit, Front Pump Fig-Nos: 03,05,07,08 | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : -Engine Control Unit
| 46***40 | Rubber Block Support, Engine Monitor | 4 |
| 50***98 | Nut | 8 |
| 69***53 | Hose Nw 5 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : Drive : -Hydr. Pump
| 17***40 | Screw Plug | 2 |
| 17***40 | Union | 3 |
| 18***40 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06128) : Drive : -Pump
| 18***40 | Shaft Seal No Field Repair Item | 1 |
| 31***99 | Screw | 7 |
| 31***99 | Socket Head Cap Srew | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : -Pump Distributor Gear
| 00***98 | O-Ring | 1 |
| 08***54 | O-Ring | 2 |
| 08***21 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06128) : Drive : -Radiator
| 21***99 | Radiator Hose ? 12 Bulk Ware, State Length Required | 2 |
| 21***99 | Radiator Hose ? 50 Bulk Ware, State Length Required | 10 |
| 30***99 | Bolt | 24 |
Komatsu : H185s-1(S/N G06128) : Drive : Air Cleaning System
| 14***40 | Maintenance Switch | 2 |
| 22***40 | Accordion Hose | 1 |
| 22***40 | Accordion Hose | 2 |
Komatsu : H185s-1(S/N G06128) : Drive : Cold Start System
| 28***40 | Bracket | 1 |
| 30***99 | Screw | 4 |
| 33***99 | Nut | 4 |
Komatsu : H185s-1(S/N G06128) : Drive : Engine Assy.
| 00***98 | Bolt | 16 |
| 24***40 | Rail (Cold Weather Design) | 4 |
| 26***40 | Rail (Cold Weather Design) | 2 |
Komatsu : H185s-1(S/N G06128) : Drive : Engine : Cummins-Diesel
Komatsu : H185s-1(S/N G06128) : Drive : Exhaust System
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 8 |
| 30***99 | Bolt 35 Lg | 16 |
Komatsu : H185s-1(S/N G06128) : Drive : Fan Drive
| 00***98 | Locking Plate | 1 |
| 26***40 | Washer, Up To 06 108 | 1 |
| 26***40 | Spacer Block | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : Fuel Lines
| 25***40 | Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required | 0 |
| 25***40 | Socket, From S/No: 06 085 | 1 |
| 25***40 | Screwed Fittings | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : Fuel Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 17***40 | Screw Plug | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : Generator Arr.
| 00***98 | Bolt | 1 |
| 50***98 | Bolt | 1 |
| 50***40 | Bushing | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : Output :
Komatsu : H185s-1(S/N G06128) : Drive : Pump With Pump Distributor Gear Arr.
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 30***99 | Bolt | 2 |
Komatsu : H185s-1(S/N G06128) : Drive : Radiator Arr.
| 00***98 | Clamp | 4 |
| 00***98 | Union | 1 |
| 08***40 | Quick Disconnect Coupling | 1 |
Komatsu : H185s-1(S/N G06128) : Drive : Serial-No. :
Komatsu : H185s-1(S/N G06128) : Drive : Series :
Komatsu : H185s-1(S/N G06128) : Drive : Type :
Electric
Komatsu : H185s-1(S/N G06128) : Electric
Komatsu : H185s-1(S/N G06128) : Electric : Batteries With Cables
| 05***40 | Rubber Grommet | 4 |
| 14***40 | Cable Shoe | 16 |
| 15***40 | Battery Switch | 2 |
Komatsu : H185s-1(S/N G06128) : Electric : Horn, Illumination
| 25***40 | Compressor-Single Ton-Horn Consist. Of Fig.-No: 03-05 | 1 |
| 27***40 | Compressor-Two Ton-Horn Consist. Of Fig.-No: 05-08 | 1 |
| 30***99 | Bolt 20 mm Lg | 4 |
Komatsu : H185s-1(S/N G06128) : Electric : Standard Lighting Equipment
| 00***98 | Clamp 15/15 | 100 |
| 05***40 | Plug To Fig-No: 17 | 5 |
| 05***40 | Socket 2-Polig | 3 |
General View
Komatsu : H185s-1(S/N G06128) : General View : General View Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06128) : General View : General View Undercarriage
Komatsu : H185s-1(S/N G06128) : General View : Machine-Maintenance Parts
| 26***40 | Drive Belt, Fan - Radiator | 1 |
| 50***98 | Adhesive Lubrication Spray | 0 |
| 69***08 | Flat Belt (Generator) | 1 |
Hydraulic
Komatsu : H185s-1(S/N G06128) : Hydraulic : --Pressure Relief Valve
| 10***65 | O-Ring | 1 |
| 32***40 | Pressure Relief Valve, Assembly. Without Pressure Adjustment | 1 |
| 50***98 | O-Ring | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : --Regulating Valve
| 31***99 | Screw | 1 |
| 34***99 | Circlip | 1 |
| 34***99 | Lock Washer | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : --Throttle Check Valve
| 00***98 | O-Ring | 2 |
| 18***40 | O-Ring | 1 |
| 31***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Aeration Filter
| 33***99 | Nut | 1 |
| 44***40 | Aeration Filter, Assembly | 1 |
| 69***89 | Socket Housing | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Anticavitation Valve
| 00***98 | O-Ring | 1 |
| 13***40 | O-Ring | 1 |
| 46***40 | Anticavitation Valve Assembly | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Control Block
| 16***40 | Release Valve | 3 |
| 31***99 | Eye Bolt | 2 |
| 31***99 | Bolt | 24 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Control Plate
| 00***98 | Plug | 3 |
| 26***40 | Union | 6 |
| 31***99 | Plug | 3 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Control Valve, Load Limit
| 25***40 | Control Valve, Load Limit Assembly. 30 Bar | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Filter
| 59***40 | Hydraulic. Filter, Assembly | 1 |
| 60***40 | Plug | 1 |
| 60***40 | Seal | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -H.P. Filter
| 31***99 | Screw | 4 |
| 34***99 | Lock Washer | 4 |
| 34***40 | Gasket | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Hydr. Motor
| 31***99 | Screw | 2 |
| 31***99 | Screw | 4 |
| 32***40 | Hydraulic.-Motor, Assembly | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Pressure Relief Valve
| 31***99 | Plug | 1 |
| 31***99 | Eyebolt | 2 |
| 31***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Pressure Sequence Stage
| 10***65 | O-Ring | 1 |
| 49***40 | Pressure Sequence Stage Assembly | 1 |
| 50***98 | O-Ring | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Return Oil Filter
| 10***65 | O-Ring | 1 |
| 33***99 | Nut | 2 |
| 33***99 | Nut | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Slew-Brake Valve
| 00***98 | O-Ring | 2 |
| 25***40 | Valve Disk | 4 |
| 25***40 | Compression Spring | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : -Valve Block
| 15***40 | Test - Screw Coupling | 1 |
| 25***40 | Screw Plug | 2 |
| 31***99 | Plug | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Arr. Control Blocks And Manifold (Bullclam Bucket)
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Bolt (Standard) | 6 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Control Blocks - Manifold
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
| 31***99 | Bolt (Standard) | 96 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Control Plate
| 00***98 | Test Coupling | 5 |
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Header (Return)
| 00***98 | Half Flange | 12 |
| 00***98 | Flange Seal | 6 |
| 17***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Lines And Valves For Oil Cooler
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 1 |
| 30***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Lines :
Komatsu : H185s-1(S/N G06128) : Hydraulic : Main Oil Tank
| 00***98 | O-Ring | 5 |
| 00***98 | O-Ring | 4 |
| 00***98 | Union | 2 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Manifold
| 31***99 | Socket Head Cap Screw | 64 |
| 33***99 | Nut | 28 |
| 35***40 | Flange Seal | 30 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Manifold (Bullclam Bucket)
| 00***98 | Union | 4 |
| 15***99 | Test Socket | 5 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Oil Cooler Arr.
Komatsu : H185s-1(S/N G06128) : Hydraulic : Pressure Line - Pilot Oil Pump And Load-Sensing
| 31***99 | Screw | 18 |
| 34***99 | Lock Washer | 18 |
| 37***99 | Olive | 3 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Pump Control
| 00***98 | Socket | 4 |
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Pump Lubrication
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 1 |
| 31***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Pumps - Control Blocks
| 15***40 | Test - Screw Coupling | 3 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 6 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Rotary Joint
| 00***98 | Socket | 1 |
| 30***99 | Screw | 8 |
| 30***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Slew Gear
| 00***98 | Union | 1 |
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Suction Lines
| 00***98 | O-Ring | 1 |
| 00***98 | Half Flange | 2 |
| 00***98 | Flange Seal | 1 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Suction Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 30***99 | Screw | 8 |
Komatsu : H185s-1(S/N G06128) : Hydraulic : Valves For Control Blocks
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 18 |
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
Lubrication- And Refueling Equipment
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : -Metering Valve
| 26***40 | Metering Valve, Assembly | 1 |
| 26***40 | Metering Valve, Assembly | 1 |
| 27***40 | Metering Valve, Assembly | 1 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Boom - Lube Lines Bullclam
| 00***98 | Clamp 15/15 | 40 |
| 00***98 | Union | 12 |
| 17***40 | Cable Strap | 50 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Central Lubrication-Bullclam
| 00***98 | Clamp 10/15 | 6 |
| 00***98 | Union | 6 |
| 14***40 | Clamp 20/15 | 6 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Electr. Parts
| 00***98 | Clamp 15/15 | 5 |
| 04***40 | Dust Cap | 1 |
| 04***40 | Plug | 3 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Gear Greasing By Pinion Arr.
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 30***99 | Bolt | 4 |
| 30***99 | Screw | 1 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Greases
| 27***40 | Grease T3 Hs -40/-10? C / 50 Kg | 1 |
| 32***40 | Grease T2 Hs -20/+10? C /50 Kg | 1 |
| 50***98 | Adhesive Lubrication Spray | 1 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Hand Operated Lube Arr.
| 00***98 | Grease Nipple | 34 |
| 00***98 | Union | 34 |
| 15***40 | Clamping Ring | 68 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Lube Distributor Slew Ring
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 30***99 | Bolt | 4 |
| 30***99 | Screw | 14 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Refueling Equipment
| 08***40 | Counter Part To Fig-No. 20 | 1 |
| 25***40 | Housing, Empty | 1 |
| 25***40 | Hose Nw 20x Ca. 1500 mm Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : Lubrication- And Refueling Equipment : Stick - Lube Lines Bullclam
| 00***98 | Clamp 15/15 | 12 |
| 00***98 | Clamp 18/15 | 3 |
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
Operator'S Cab
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : -Operator'S Cab
| 00***98 | Es-Pin | 2 |
| 00***98 | Es-Pin | 1 |
| 05***40 | Grommet | 2 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : -Operator'S Seat
| 30***99 | Bolt 20 mm Lg | 2 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Add. Parts Protection Roof For Air Conditioning System
| 30***99 | Bolt 25 mm Lg | 2 |
| 30***99 | Bolt | 4 |
| 31***99 | Screw M8 X 50 | 2 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Cab Support
| 25***40 | Hv-Washer | 8 |
| 26***40 | Air Cleaner, Cabin Supercharger | 3 |
| 29***40 | Gill Breather | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Cabin Supercharger
| 30***99 | Bolt | 3 |
| 32***40 | Rubber Cord 500 Lg. Bulk Ware, State Length Required | 0 |
| 32***40 | H.P. Blower | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Colour :
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Glazing
| 08***40 | Clamping Section 2800 Lg. (To Fig-Nos. 02,04) Bulk Ware, State Length Required | 0 |
| 08***40 | Filler Section 3000 Lg. Bulk Ware, State Length Required | 0 |
| 30***40 | Rear Window 803x458 | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Operation Panel
| 05***40 | Tab To Fig-No: 43 1,5 - 2,5 | 0 |
| 05***40 | Grommet | 8 |
| 05***40 | Grommet | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Operator'S Cab Arr.
| 08***40 | Mirror | 2 |
| 11***40 | Mirror Bracket, R.H | 1 |
| 16***40 | Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required | 1 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Operator'S Stand
| 05***40 | Grommet | 1 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Protection Roof
| 30***99 | Screw | 8 |
| 30***99 | Bolt Standard | 4 |
| 31***99 | Washer | 4 |
Komatsu : H185s-1(S/N G06128) : Operator'S Cab : Windscreen Washing Assy.
| 05***40 | Wiper Motor 120? | 1 |
| 19***40 | Diaphragm Pump | 1 |
| 19***40 | Water Reservoir | 1 |
Slew Ring
Komatsu : H185s-1(S/N G06128) : Slew Ring : --Brake
| 31***99 | Screw Plug | 8 |
| 34***99 | Seal Ring | 8 |
| 34***99 | Circlip | 1 |
Komatsu : H185s-1(S/N G06128) : Slew Ring : -Hydr. Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06128) : Slew Ring : -Slew Gear
| 21***99 | Precision Tubing 10x1.5 Bulk Ware, State Length Required | 0 |
| 21***99 | Precision Tubing 18x1,5, Lg 0,13 M Bulk Ware, State Length Required | 0 |
| 30***99 | Bolt | 2 |
Komatsu : H185s-1(S/N G06128) : Slew Ring : Slew Ring And Slew Gear Box
| 00***98 | Grease Nipple | 32 |
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
Komatsu : H185s-1(S/N G06128) : Slew Ring : Arr.
Superstructure
Komatsu : H185s-1(S/N G06128) : Superstructure : Aux. Catwalk
| 27***40 | Platform | 3 |
| 31***40 | Grid 40x480x540 | 4 |
| 31***40 | Wing Nut, Plastic | 50 |
Komatsu : H185s-1(S/N G06128) : Superstructure : Covering, Engine Housing
| 08***40 | Silent Block | 1 |
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Superstructure : Fire Wall
| 26***40 | Cellular Rubber 10x130x250 Bulk Ware, State Length Required | 0 |
| 30***99 | Bolt | 10 |
| 30***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06128) : Superstructure : Pin, Boom - Counterweight
| 26***40 | Washer | 8 |
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Superstructure : Rails And Platforms
| 27***40 | Grating 420x1650 | 1 |
| 27***40 | Grating | 1 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06128) : Superstructure : Telescopic Steps Arr. And Ladders
| 11***99 | Cable Clamp | 2 |
| 30***99 | Bolt | 1 |
| 30***99 | Screw | 1 |
Switch- And Junction Boxes
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Cables Control Blocks
| 32***40 | Rail 300 Lg. Bulk Ware, State Length Required | 0 |
| 32***40 | Cable Union Pg 9 | 18 |
| 35***40 | Cable Protection Hose Pg 9x***00 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Cables Control Frame
| 00***98 | Clamp 10/15 | 20 |
| 32***40 | Rubber Grommet | 3 |
| 32***40 | Thread Pin | 20 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Cables Engine, Cu, Ktta
| 00***98 | Clamp 15/15 | 20 |
| 05***40 | Rubber Grommet | 4 |
| 05***40 | Plug 3-Polig | 1 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Cables Oil Tank And Switch
| 00***98 | Clamp 15/15 | 20 |
| 05***40 | Cable Lug, Red | 15 |
| 08***40 | Pressure Switch | 1 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Electric, Cab Support
| 04***40 | Dust Cap | 1 |
| 04***40 | Plug | 1 |
| 05***40 | Flanged Socket | 1 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Engine Switch Box X4
| 05***40 | Cable Shoe, Red | 0 |
| 05***40 | Cable Lug (M6) | 0 |
| 05***40 | Ground Wire - Series Terminal | 8 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : General View
| 25***40 | Limit Switch | 2 |
| 30***99 | Bolt | 4 |
| 51***40 | Resilient Sleeve | 4 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Junction Box (Cab Support) X11
| 05***40 | Ground Wire - Series Terminal | 3 |
| 25***40 | Housing, Empty | 1 |
| 32***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Junction Box Filter Frame X5
| 25***40 | Housing, Empty | 1 |
| 32***99 | Screw | 2 |
| 32***40 | Cable Union Pg 21 | 1 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Junction Box Oil Tank X3
| 05***40 | Ground Wire - Series Terminal | 5 |
| 25***40 | Housing, Empty | 1 |
| 32***99 | Screw | 6 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Junction Box, Control Blocks X6
| 05***40 | Ground Wire - Series Terminal | 10 |
| 25***40 | Housing, Empty | 1 |
| 32***99 | Screw | 6 |
Komatsu : H185s-1(S/N G06128) : Switch- And Junction Boxes : Main Switch Box X2
| 27***40 | Sleeve Marker | 0 |
| 27***40 | Cable Channel 40x40 Ca. 1200 mm Bulk Ware, State Length Required | 0 |
| 32***99 | Cross Connection | 28 |
Undercarriage
Komatsu : H185s-1(S/N G06128) : Undercarriage
Komatsu : H185s-1(S/N G06128) : Undercarriage : --Brake
| 00***98 | Shaft Seal | 2 |
| 31***99 | Plug | 9 |
| 33***99 | Seal Ring | 9 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : -Gear
| 00***98 | Shaft Seal | 2 |
| 08***95 | Shaft Seal | 2 |
| 30***99 | Bolt | 12 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : -Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Bottom Roller
| 30***99 | Bolt | 8 |
| 32***40 | Plug | 1 |
| 32***40 | Plug | 1 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Hydr. Tensioner
| 25***40 | Test-Screw Coupling | 1 |
| 25***40 | Seal Ring | 1 |
| 32***40 | Rod Guide Ring | 7 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Hydraulic
Komatsu : H185s-1(S/N G06128) : Undercarriage : Idler Assy.
| 30***99 | Screw | 8 |
| 31***40 | Axle Stirrup | 4 |
| 31***99 | Washer | 8 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Rotary Joint
| 16***40 | Screw Plug | 4 |
| 20***40 | Screw Plug | 2 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Side Frame
| 22***40 | Lifetime Seal | 4 |
| 25***40 | Hv-Washer | 80 |
| 30***99 | Bolt 200lg. (Standard) | 64 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Top Roller
| 31***99 | Plug | 1 |
| 34***99 | Dowel Pin | 2 |
| 42***40 | Pin | 1 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Track Adjuster
| 00***98 | Test Socket | 2 |
| 15***40 | Test - Screw Coupling | 2 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Track Group
| 33***99 | Nut (Standard) | 184 |
| 34***99 | Washer | 368 |
| 44***40 | Bolt | 184 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Travelling Brake
| 21***99 | Pipe, Assembly. ? 15x60 Bulk Ware, State Length Required | 0 |
| 37***99 | Union | 1 |
| 37***99 | Pipe Connection | 2 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Undercarriage
| 30***40 | Pin (Standard) | 8 |
| 30***99 | Screw | 64 |
| 30***99 | Bolt (Standard) | 8 |
Komatsu : H185s-1(S/N G06128) : Undercarriage : Valve Block
| 00***98 | Union | 1 |
| 15***40 | Union | 2 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Frequently asked questions
What engine does the Komatsu H185S-1 use?
The Komatsu H185S-1 uses a Komatsu diesel engine. Specific power output for larger variants in the series reaches 485 kW (651 HP) at 1,800 rpm.
What is the operating weight of the Komatsu H185S-1?
Operating weights for the H185S series range from 106,700 kg to 109,500 kg, varying by configuration and bucket size.
What replaced the Komatsu H185S-1?
The H185S-1 was succeeded by newer generations of Komatsu hydraulic mining excavators, including the PC-series large excavators, as the company transitioned its product line to incorporate advanced technology and larger capacities.
What H185S-1(S/N G06128) owners discuss
What are the typical powertrain and hydraulic behaviors for the Komatsu H185S-1 series?
What undercarriage or wear patterns are typical for this machine type?
What are the known engine quirks for the Komatsu H185S-1 series?
What are common electrical or sensor issues reported by operators?
What should be checked when buying a used Komatsu H185S-1 (S/N G06128)?
What hydraulic fluid specifications are recommended for the Komatsu H185S-1?
What safety-critical fixes are associated with the main safety valve?
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 G06128). Related factory variants of the same model family:
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