Komatsuhydraulic shovels(no series)
Komatsu H185S-1(S/N G06120)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu H185S-1 is a hydraulic mining shovel designed for high-production loading applications in open-pit environments. It belongs to the large hydraulic shovel class, distinct from standard crawler excavators, and features a robust chassis engineered for heavy-duty cyclic loading. Production years for this specific generation span the late 1990s through the early 2000s. The machine is powered by a Komatsu diesel engine, typically the SA6D140 series, providing substantial torque for deep digging and high breakout forces. Operating weight ranges approximately from 180 to 190 metric tons depending on the specific boom, stick, and bucket configuration. The H185S-1 succeeded the earlier H185 series and was eventually replaced by the H185-2 series, which introduced updated emissions compliance and refined hydraulic systems. Configurations offered include various boom lengths, stick options, and bucket capacities to match specific mine site requirements.
Across the H185S-1 generation, key changes focused on enhancing structural durability and improving hydraulic efficiency to meet growing mining productivity demands. The S-1 series refined the undercarriage design to handle increased ground pressure and extended component life in abrasive conditions. In the used and parts market today, the H185S-1 remains significant due to its widespread adoption in global mining fleets and the availability of robust aftermarket support. Its mechanical simplicity compared to newer electronic-heavy models makes it a preferred choice for operators seeking reliable, serviceable heavy equipment. The machine's enduring presence ensures a steady supply of used components and remanufactured parts, sustaining its value in secondary markets long after original production ceased.
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 G06120) specifications
Engine
| Model | Not documented for serial range G06120 — verify with your dealer |
| Gross Power | Not documented for this exact serial range — verify with your dealer |
| 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 |
| Reach | 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 G06120) 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 G06120) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor wear metals and contamination in the hydraulic system and engine oil. Check hydraulic oil particle count and viscosity to detect pump or valve degradation early. Inspect coolant pH and SCA concentration levels to prevent scaling and corrosion in the engine block and radiator. Monitor fuel dilution and soot levels in the engine oil to assess combustion efficiency and filter performance. Track hydraulic system pressure trends to identify declining pump output before catastrophic failure occurs.
Corrective & Common Repairs
Address frequent hydraulic hose failures by inspecting for chafing against the boom structure and replacing worn clamps. Repair leaking swing bearing seals by checking for oil accumulation around the swing circle and replacing worn O-rings. Fix track tension issues by adjusting the track adjuster cylinders to maintain proper sag and prevent derailment. Replace worn track shoes and grouser pads to maintain traction and reduce undercarriage wear. Repair hydraulic cylinder leaks by replacing piston seals and rod wipers on the boom, stick, and bucket cylinders.
Overhaul & Rebuild Points
Rebuild the main hydraulic pump when flow output drops below specification or internal wear metals exceed KOWA limits. Overhaul the swing motor and gearbox when excessive backlash or noise indicates gear wear or bearing failure. Rebuild the final drive units when oil contamination or loss of travel power suggests planetary gear damage. Inspect and replace worn swing circle teeth and rollers to prevent structural damage to the upper structure. Rebuild the engine injectors and turbocharger when fuel efficiency declines or exhaust smoke indicates combustion issues.
Seasonal & Environment Servicing
In cold climates, use low-temperature hydraulic oil and coolant to prevent fluid thickening and freezing. Inspect and replace worn track pads to improve traction on icy or muddy mine surfaces. Clean radiator and oil cooler fins frequently to prevent overheating in dusty environments. Check battery hold-downs and terminals for corrosion caused by moisture and vibration. Adjust track tension to prevent loosening in rocky terrain and to maintain proper alignment on steep slopes.
H185S-1(S/N G06120) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 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 → |
| 358 601 40 | Return Oil Filter, Assembly | Lubrication service | Check fitment → |
| 698 303 73 | Lube Filter Consist. Of Fig-Nos: 34-39 | Scheduled service item | Check fitment → |
| 698 315 73 | Filter Plug | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
H185S-1(S/N G06120) 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 voltage at the pin connector |
| CA441 | Battery voltage too low | Weak battery or charging system fault | Replace the battery or alternator 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 check pump lines |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter element |
| B@HANS | Hydraulic oil overheating | Contaminated oil, clogged filter, or cooler fan failure | Change the hydraulic filter and oil; check the cooler fan operation |
| AB00KE | Charging voltage too low | Alternator malfunction or loose belt | Replace the alternator or tighten the belt |
| CA111 | Internal engine controller fault | ECM internal failure | Replace or reprogram the ECM |
| CA122 | Intake air pressure high voltage | Sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| CA153 | Intake air temperature sensor high voltage | Sensor malfunction or wiring short | 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.
H185S-1(S/N G06120) attachments & work tools
Loading Shovels
The H185S-1 is a large mining hydraulic shovel designed for loading overburden and ore. Factory configurations typically include a long-reach boom and stick assembly optimized for high-cycle loading operations. Bucket capacities for this class generally range from 15 to 20 cubic meters, varying by material density and specific configuration.
Backhoes
While the H185S-1 is primarily a shovel, the broader H185S series and related large mining excavators can be configured as backhoes for trenching or heavy digging. Backhoe configurations for this size class typically utilize a shorter boom and stick to maximize breakout force. Bucket capacities for backhoe applications in this class vary significantly based on the specific stick length and application requirements.
Couplers and Mounting
Large mining shovels like the H185S-1 typically use a fixed pin-and-bushing or hydraulic quick-coupler system for bucket attachment to handle extreme loads. The mounting interface is specific to the boom head geometry and hydraulic circuit layout of the H185S-1 series. Compatibility with aftermarket quick couplers requires verification of hydraulic flow rates and mechanical pin dimensions against the factory specification.
Hydraulic Kits and Arrangements
Attachment compatibility depends on the machine's hydraulic system configuration, including main pump flow and pressure settings. Tools requiring high hydraulic flow or auxiliary circuits must match the available hydraulic kit options installed on the H185S-1. Factory specifications for hydraulic pressure and flow rates vary by engine and generation, requiring dealer verification for specific tool requirements.
Factory Configurations and Guarding
The H185S-1 series offers various factory-installed guarding options for the boom, stick, and bucket to extend service life in abrasive mining environments. Engine configurations for the H185S-1 series vary by serial number and regional emissions requirements, with specific engine models assigned to different production periods. Operators should consult the machine's data plate and factory spec sheet to confirm the exact engine and guarding options installed.
All H185S-1(S/N G06120) assemblies by section
Every catalogued assembly group for the Komatsu H185S-1(S/N G06120). 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 G06120) : * = 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 G06120) : * = Variations From Page : : Cylindrical Bearing
| 00***98 | O-Ring | 40 |
| 30***40 | Weld On Angle | 4 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06120) : * = 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 G06120) : * = Variations From Page : : Distance Plate Between Motor And Gear Box
| 00***98 | Grease Nipple | 32 |
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
Komatsu : H185s-1(S/N G06120) : * = Variations From Page : : Grease (190 Kg) (Molub-Alloy 936 Sf Light)
| 21***99 | Pipe ? 10 Bulk Ware, State Length Required | 0 |
| 37***99 | Union | 1 |
| 62***40 | Lube Pump Station Consist. Of Fig-Nos: 02-49 | 1 |
Komatsu : H185s-1(S/N G06120) : * = Variations From Page : : Pin
| 00***98 | Grease Nipple | 5 |
| 21***40 | Bolt Lock | 6 |
| 33***99 | Pin, Up To 06 119 | 2 |
Air Condit. System, Heater
Komatsu : H185s-1(S/N G06120) : Air Condit. System, Heater : -Air Conditioning Unit
| 31***99 | Screw | 3 |
| 34***99 | Lock Washer | 3 |
| 46***40 | Air Conditioning Unit Assembly | 1 |
Komatsu : H185s-1(S/N G06120) : Air Condit. System, Heater : -Compressor
| 25***40 | Compressor, Assembly | 1 |
| 69***73 | Upstroke Valve | 1 |
| 69***73 | Valve | 1 |
Komatsu : H185s-1(S/N G06120) : Air Condit. System, Heater : -Coupling
| 32***99 | Threaded Pin | 1 |
| 33***99 | Nut | 8 |
| 49***40 | Clutch Assembly | 1 |
Komatsu : H185s-1(S/N G06120) : Air Condit. System, Heater : -H.P. Filter
| 00***98 | O - Ring | 1 |
| 00***98 | O-Ring | 1 |
| 32***40 | H.P. Filter, Assembly | 1 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Air Condit. System, Heater : Air Conditioning System Arr.
| 16***40 | Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required | 0 |
| 23***40 | Hose Nw 10x Ca. 6000 mm Bulk Ware, State Length Required | 0 |
| 25***40 | Hose Fittings | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Air Condit. System, Heater : Compressor Drive, Air Conditioning
| 00***98 | Screw Retention | 4 |
| 00***98 | Plate Ring | 4 |
| 18***40 | Connection Plate | 1 |
Komatsu : H185s-1(S/N G06120) : Air Condit. System, Heater : Hydr. For Air Conditioning System
| 00***98 | Test Socket | 1 |
| 00***98 | Union | 1 |
| 18***40 | Pressure Relief Valve | 1 |
Annex
Komatsu : H185s-1(S/N G06120) : Annex : Colour Basic Machine :
Komatsu : H185s-1(S/N G06120) : Annex : Electric Schematics :
Komatsu : H185s-1(S/N G06120) : Annex : Hydraulic Schematics :
Komatsu : H185s-1(S/N G06120) : Annex : Tools And Accessories
Backhoe Equipment
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Backhoe
| 49***40 | Digging Tooth | 5 |
| 49***40 | Key | 5 |
| 49***40 | Catch | 5 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Basic Boom Cylinder
| 31***99 | Screw | 4 |
| 36***99 | O-Ring | 1 |
| 49***40 | Connector Plate | 1 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Boom
| 00***98 | O-Ring | 40 |
| 30***40 | Weld On Angle | 4 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Bucket Cylinder
| 00***98 | Seal Ring | 1 |
| 30***99 | Bolt | 8 |
| 31***99 | Bolt (Standard) | 16 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Hydr. Cylinder
| 00***98 | Grease Nipple | 3 |
| 00***98 | O-Ring | 1 |
| 22***40 | Seal Kit | 1 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Steering And Rod
| 00***98 | Grease Nipple | 5 |
| 21***40 | Bolt Lock | 6 |
| 33***99 | Pin, Up To 06 119 | 2 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Stick
| 30***99 | Bolt | 6 |
| 30***99 | Bolt Pin Lock From S/No: 06 120 | 20 |
| 34***99 | Washer Pin Lock From S/No: 06 120 | 20 |
Komatsu : H185s-1(S/N G06120) : Backhoe Equipment : Stick Cylinder
| 00***98 | O-Ring | 1 |
| 30***40 | Connecting Block | 1 |
| 30***99 | Bolt | 2 |
Drive
Komatsu : H185s-1(S/N G06120) : Drive
Komatsu : H185s-1(S/N G06120) : Drive : -Air Cleaner
| 33***99 | Nut | 20 |
| 34***99 | Washer | 20 |
| 34***99 | Lock Washer | 20 |
Komatsu : H185s-1(S/N G06120) : Drive : -Coupling
| 30***99 | Bolt | 10 |
| 30***99 | Screw | 26 |
| 34***99 | Dowel Sleeve | 24 |
Komatsu : H185s-1(S/N G06120) : Drive : -Diesel Engine
| 60***40 | Diesel Engine | 1 |
| 69***73 | Seal Ring | 4 |
| 69***73 | Water Pump | 1 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : Drive : -Hydr. Pump
| 17***40 | Screw Plug | 2 |
| 17***40 | Union | 3 |
| 18***40 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Drive : -Pump Distributor Gear
| 00***98 | O-Ring | 1 |
| 08***54 | O-Ring | 2 |
| 08***21 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Drive : Air Cleaning System
| 14***40 | Maintenance Switch | 2 |
| 22***40 | Accordion Hose | 1 |
| 22***40 | Accordion Hose | 2 |
Komatsu : H185s-1(S/N G06120) : Drive : Cold Start System
| 28***40 | Bracket | 1 |
| 30***99 | Screw | 4 |
| 33***99 | Nut | 4 |
Komatsu : H185s-1(S/N G06120) : Drive : Engine Assy.
| 24***40 | Rail (Cold Weather Design) | 4 |
| 26***40 | Rail (Cold Weather Design) | 2 |
| 26***40 | Cover Tube For Sensor | 1 |
Komatsu : H185s-1(S/N G06120) : Drive : Engine : Cummins-Diesel
Komatsu : H185s-1(S/N G06120) : Drive : Exhaust System
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 8 |
| 30***99 | Bolt 35 Lg | 16 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : Drive : Fuel Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 17***40 | Screw Plug | 1 |
Komatsu : H185s-1(S/N G06120) : Drive : Output :
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Drive : Radiator Arr.
| 00***98 | Clamp | 4 |
| 00***98 | Union | 1 |
| 08***40 | Quick Disconnect Coupling | 1 |
Komatsu : H185s-1(S/N G06120) : Drive : Serial-No. :
Komatsu : H185s-1(S/N G06120) : Drive : Series :
Komatsu : H185s-1(S/N G06120) : Drive : Type :
Electric
Komatsu : H185s-1(S/N G06120) : Electric : Batteries With Cables
| 14***40 | Cable Shoe | 8 |
| 15***40 | Battery Switch | 2 |
| 30***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Electric : Lighting
| 00***98 | Clamp 15/15 | 10 |
| 30***99 | Bolt 20 mm Lg | 4 |
| 32***40 | Rocker Switch 1-Polig | 2 |
Komatsu : H185s-1(S/N G06120) : Electric : Standard Lighting Equipment
| 00***98 | Clamp 15/15 | 100 |
| 05***40 | Cable Protection Hose Pg 7 Bulk Ware, State Length Required | 0 |
| 05***40 | Socket 2-Polig | 3 |
General View
Komatsu : H185s-1(S/N G06120) : General View : General View Backhoe Equipment
Komatsu : H185s-1(S/N G06120) : General View : General View Undercarriage
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : Hydraulic : --Regulating Valve
| 31***99 | Screw | 1 |
| 34***99 | Circlip | 1 |
| 34***99 | Lock Washer | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : --Throttle Check Valve
| 00***98 | O-Ring | 2 |
| 18***40 | O-Ring | 1 |
| 31***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Aeration Filter
| 33***99 | Nut | 1 |
| 44***40 | Aeration Filter, Assembly | 1 |
| 69***89 | Socket Housing | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Anticavitation Valve
| 00***98 | O-Ring | 1 |
| 13***40 | O-Ring | 1 |
| 46***40 | Anticavitation Valve Assembly | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Control Block
| 16***40 | Release Valve | 3 |
| 31***99 | Eye Bolt | 2 |
| 31***99 | Bolt | 24 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Control Valve, Load Limit
| 25***40 | Control Valve, Load Limit Assembly. 30 Bar | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Filter
| 59***40 | Hydraulic. Filter, Assembly | 1 |
| 60***40 | Plug | 1 |
| 60***40 | Seal | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -H.P. Filter
| 31***99 | Screw | 4 |
| 34***99 | Lock Washer | 4 |
| 34***40 | Gasket | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Hydr. Motor
| 31***99 | Screw | 2 |
| 31***99 | Screw | 4 |
| 32***40 | Hydraulic.-Motor, Assembly | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Pressure Relief Valve
| 31***99 | Plug | 1 |
| 31***99 | Eyebolt | 2 |
| 31***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Hydraulic : -Return Oil Filter
| 10***65 | O-Ring | 1 |
| 33***99 | Nut | 2 |
| 33***99 | Nut | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Slew-Brake Valve
| 00***98 | O-Ring | 2 |
| 25***40 | Valve Disk | 4 |
| 25***40 | Compression Spring | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : -Valve Block
| 15***40 | Test - Screw Coupling | 1 |
| 25***40 | Screw Plug | 2 |
| 31***99 | Plug | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Arr. Control Blocks And Manifold (Backhoe)
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Bolt (Standard) | 6 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Control Blocks - Manifold
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
| 31***99 | Bolt (Standard) | 96 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Control Lines For Pilot Oil Units
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Screw Plug | 6 |
| 18***40 | Connection Plate | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Control Plate
| 00***98 | Test Coupling | 5 |
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Header (Return)
| 00***98 | Half Flange | 12 |
| 00***98 | Flange Seal | 6 |
| 17***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Hydraulic : Lines :
Komatsu : H185s-1(S/N G06120) : Hydraulic : Main Oil Tank
| 00***98 | O-Ring | 5 |
| 00***98 | O-Ring | 4 |
| 00***98 | Union | 2 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Manifold
| 31***99 | Socket Head Cap Screw | 64 |
| 33***99 | Nut | 28 |
| 35***40 | Flange Seal | 30 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Manifold (Backhoe)
| 00***98 | Union | 6 |
| 15***99 | Test Socket | 5 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Oil Cooler Arr.
| 25***40 | Hv-Washer | 20 |
| 30***99 | Bolt (Standard) | 10 |
| 30***99 | Bolt | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Hydraulic : Pump Control
| 00***98 | Socket | 3 |
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Pump Lubrication
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 1 |
| 31***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Pumps - Control Blocks
| 15***40 | Test - Screw Coupling | 3 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 6 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Rotary Joint
| 00***98 | Socket | 1 |
| 30***99 | Screw | 8 |
| 30***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Slew Gear
| 00***98 | Union | 1 |
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Suction Lines
| 00***98 | O-Ring | 1 |
| 00***98 | Half Flange | 2 |
| 00***98 | Flange Seal | 1 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Suction Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 30***99 | Screw | 8 |
Komatsu : H185s-1(S/N G06120) : Hydraulic : Valves For Control Blocks
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 7 |
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
Lubrication- And Refueling Equipment
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : --Pump
| 00***98 | O-Ring To Fig-Nos. 61,62 | 2 |
| 69***14 | Pin | 1 |
| 69***16 | Bush With Thread | 1 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : -Lube Pump Station
| 21***99 | Pipe ? 10 Bulk Ware, State Length Required | 0 |
| 37***99 | Union | 1 |
| 62***40 | Lube Pump Station Consist. Of Fig-Nos: 02-49 | 1 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : -Metering Valve
| 26***40 | Metering Valve, Assembly | 1 |
| 69***02 | Nipple | 1 |
| 69***03 | Adjusting Screw | 1 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : Boom - Backhoe Equipment - Lube Lines, 8.15 M
| 00***98 | Clamp 15/15 | 20 |
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe ? 16x50 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : Drip Lube Pump Arr.
| 00***98 | Pin | 3 |
| 20***40 | Screw Plug | 2 |
| 20***40 | Coupler Plug Nw 12.5 | 1 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : Dropping Lubrication Assy.
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe, Assembly. ? 25 Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe ? 10x1000 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : Electr. Parts
| 04***40 | Dust Cap | 3 |
| 04***40 | Plug | 3 |
| 14***40 | Socket | 3 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : 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 G06120) : 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 G06120) : Lubrication- And Refueling Equipment : Lube Pump Arr.
| 00***98 | Pin | 3 |
| 20***40 | Screw Plug | 2 |
| 20***40 | Coupler Plug Nw 12.5 | 1 |
Komatsu : H185s-1(S/N G06120) : Lubrication- And Refueling Equipment : Stick - Backhoe Equipment - Lube Lines, 4 M
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
| 26***40 | Nipple | 3 |
| 30***99 | Bolt | 4 |
Operator'S Cab
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Operator'S Cab : -Operator'S Seat
| 30***99 | Bolt | 2 |
| 31***99 | Screw | 4 |
| 34***99 | Washer | 6 |
Komatsu : H185s-1(S/N G06120) : Operator'S Cab : -Pilot Oil Unit
| 25***40 | Pilot Oil Unit Assembly | 1 |
| 30***99 | Screw To Valve Y11d+Y120 | 2 |
| 31***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : 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 G06120) : Operator'S Cab : Colour :
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Operator'S Cab : Operation Panel
| 05***40 | Grommet | 8 |
| 05***40 | Grommet | 1 |
| 30***40 | Operation Panel, Part 2 (W/O Electric Appliances) | 1 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Operator'S Cab : Operator'S Stand
| 05***40 | Grommet | 1 |
| 30***99 | Bolt 20 mm Lg | 4 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : Operator'S Cab : Protection Roof
| 30***99 | Screw | 8 |
| 30***99 | Bolt Standard | 4 |
| 31***99 | Washer | 4 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Slew Ring : --Brake
| 31***99 | Screw Plug | 8 |
| 34***99 | Seal Ring | 8 |
| 34***99 | Circlip | 1 |
Komatsu : H185s-1(S/N G06120) : Slew Ring : -Hydr. Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06120) : Slew Ring : -Slew Gear
| 00***98 | Union | 1 |
| 00***98 | Union | 1 |
| 21***99 | Precision Tubing 10x1.5 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06120) : Slew Ring : Slew Ring And Slew Gear Box Arr.
| 00***98 | Grease Nipple | 32 |
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
Superstructure
Komatsu : H185s-1(S/N G06120) : Superstructure : Covering, Engine Housing
| 08***40 | Silent Block | 1 |
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Superstructure : Pin, Boom - Counterweight
| 26***40 | Washer | 8 |
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : Superstructure : Rails And Platforms
| 27***40 | Grating 420x1650 | 1 |
| 27***40 | Grating | 1 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06120) : Superstructure : Telescopic Steps Arr. And Ladders
| 11***99 | Cable Clamp | 2 |
| 18***40 | Limit Switch | 1 |
| 30***99 | Bolt | 1 |
Switch- And Junction Boxes
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Switch- And Junction Boxes : Cables Control Frame
| 00***98 | Clamp 10/15 | 20 |
| 32***40 | Emergency Push Button | 1 |
| 32***40 | Cable Union Pg 9 | 6 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Switch- And Junction Boxes : Cables Oil Tank And Switch
| 00***98 | Clamp 15/15 | 20 |
| 05***40 | Cable Lug, Red | 15 |
| 05***15 | Cable Protection Hose Ca. 4000 mm Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Switch- And Junction Boxes : Engine Switch Box X4
| 05***40 | Cable Shoe, Red | 20 |
| 05***40 | Cable Lug (M6) | 5 |
| 05***40 | Ground Wire - Series Terminal | 4 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : Switch- And Junction Boxes : Junction Box Filter Frame X5
| 05***40 | Ground Wire - Series Terminal | 3 |
| 25***40 | Housing, Empty | 1 |
| 31***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : 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 G06120) : Switch- And Junction Boxes : Main Switch Box X2
| 26***40 | Retainer | 2 |
| 27***40 | Sleeve Marker | 0 |
| 27***40 | Cable Channel 40x40 Ca. 1200 mm Bulk Ware, State Length Required | 0 |
Undercarriage
Komatsu : H185s-1(S/N G06120) : Undercarriage : --Brake
| 00***98 | Shaft Seal | 2 |
| 31***99 | Plug | 9 |
| 33***99 | Seal Ring | 9 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : -Gear
| 00***98 | Shaft Seal | 2 |
| 08***95 | Shaft Seal | 2 |
| 30***99 | Bolt | 12 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : -Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : Bottom Roller
| 30***99 | Bolt | 8 |
| 32***40 | Plug | 1 |
| 32***40 | Plug | 1 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Undercarriage : Hydraulic
Komatsu : H185s-1(S/N G06120) : Undercarriage : Idler Assy.
| 30***99 | Screw | 8 |
| 31***40 | Axle Stirrup | 4 |
| 31***99 | Washer | 8 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : Rotary Joint
| 16***40 | Screw Plug | 4 |
| 20***40 | Screw Plug | 2 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : Side Frame
| 22***40 | Lifetime Seal | 4 |
| 25***40 | Hv-Washer | 80 |
| 30***99 | Bolt 200lg. (Standard) | 64 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : Top Roller
| 31***99 | Plug | 1 |
| 34***99 | Dowel Pin | 2 |
| 42***40 | Pin | 1 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Undercarriage : Track Group
| 33***99 | Nut (Standard) | 184 |
| 34***99 | Washer | 368 |
| 44***40 | Bolt | 184 |
Komatsu : H185s-1(S/N G06120) : 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 G06120) : Undercarriage : Undercarriage
| 00***98 | Union | 2 |
| 30***99 | Bolt | 8 |
| 31***99 | Socket Head Cap Screw | 16 |
Komatsu : H185s-1(S/N G06120) : Undercarriage : Valve Block
| 00***98 | Union | 1 |
| 15***40 | Union | 2 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
H185S-1(S/N G06120) serial number reference
Locate the machine identification plate on the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The prefix is the first three characters of the 17-character ISO PIN stamped on the emissions/export plate; for this machine, the serial number G06120 identifies the specific unit within the H185S-1 series.
| Prefix | Identifies | Notes |
|---|---|---|
| G06120 | H185S-1 | Serial G06120 identifies a specific unit within the Komatsu H185S-1 hydraulic shovel production run. The model designation H185S-1 denotes a mining-class hydraulic shovel. Verify with your dealer for the exact build date, engine configuration, and emission tier, as these vary by production batch. |
Frequently asked questions
What engine does the Komatsu H185S-1 use?
The Komatsu H185S-1 is powered by a Komatsu SA6D140 series diesel engine.
What is the operating weight of the Komatsu H185S-1?
The operating weight of the Komatsu H185S-1 ranges from approximately 180 to 190 metric tons, varying by configuration.
What model replaced the Komatsu H185S-1?
The Komatsu H185-2 series replaced the H185S-1, featuring updated emissions compliance and refined hydraulic systems.
What H185S-1(S/N G06120) owners discuss
What are the typical powertrain and hydraulic behaviors observed in the Komatsu H185S-1 series?
The H1185S-1 series is characterized by smooth hydraulic operation and high fuel efficiency. A known failure pattern involves the main hydraulic pump and engine failing in close proximity, often leading to poor resale value. If all hydraulic functions become slow simultaneously, the issue typically stems from shared supply components, pump control, or engine performance rather than individual cylinders. Weak performance when hot often indicates internal leakage in the pump, main control valve, or cylinders due to decreased oil viscosity at operating temperature.
What undercarriage and wear patterns are typical for this machine type?
Undercarriage components, including track pads, bushings, and bearings, are subject to significant wear and tear. Worn bushings can lead to noise and vibration, while worn bearings may cause premature track failure. Track tension must be monitored regularly, as repeated loosening often indicates issues with the tensioner or undercarriage wear. Debris packed into the undercarriage can also cause mechanical resistance and uneven travel.
What are the common engine quirks for this series?
Engine performance issues are a primary concern, including loss of power under load, increased fuel consumption, and overheating. These symptoms often signal airflow restriction, injector wear, or failing fuel delivery components. Overheating may indicate a blocked cooling package or inadequate coolant levels. The engine may idle normally but lose power when the operator combines boom, arm, and bucket movements, suggesting the hydraulic system is placing excessive load on the engine or the engine cannot produce expected power.
What are the common electrical and sensor issues?
Komatsu excavators rely heavily on electronic control systems. 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 these symptoms when the machine is subjected to continuous load, dust exposure, and temperature extremes.
What should be checked when buying a used H185S-1 (S/N G06120)?
Verify the exact serial-prefix specification sheet and installed attachment package, as configurations affect weight, reach, and fuel use. Inspect the hydraulic system for leaks, stuck components, and fluid levels. Check the engine cooling system for blockages and test the battery with a multimeter. Inspect bushings, bearings, and track pads for wear. Verify the machine's history and ensure the operator is proficient in reading electrical and hydraulic schematics, as repairs can be complex.
What safety-critical fix requires dealer verification?
The main safety valve must be regularly inspected and maintained to ensure the smooth operation of the entire hydraulic system. If the machine exhibits slow heating or abnormal hydraulic behavior, the main safety valve may require grinding and repair. Have your dealer verify the main safety valve condition and hydraulic system integrity.
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 G06120). 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 G06091)H185S-1(S/N G06098)H185S-1(S/N G06121)H185S-1(S/N G06122)
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