Komatsuhydraulic shovels(no series)
Komatsu H185S-1(S/N G06122)
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. Production years for this series span the late 1990s through the 2000s, serving as the successor to the H185 series and preceding the H185S-2 generation. The machine is available in backhoe and loading shovel configurations, with operating weights ranging from approximately 106,700 kg to 109,500 kg depending on the specific setup and counterweight. It is engineered for heavy-duty mining environments, featuring a robust chassis and high-capacity hydraulic systems to match large dump truck fleets.
Across the H185 series generations, Komatsu refined powertrain efficiency and undercarriage durability to extend component life in abrasive mining conditions. The H185S-1 remains significant in the used and parts market because its widespread deployment created a deep ecosystem of compatible wear parts and service knowledge. Owners of this serial range often seek specific undercarriage components and cylinder rebuild kits to maintain uptime, as the machine's age necessitates proactive replacement of high-wear items to preserve resale value and operational reliability.
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 G06122) specifications
Engine
| Model | Komatsu SAA6D140E-1 |
| Emissions Tier | Tier 2 |
Weights
| Operating Weight | 106,700 - 109,500 kg (235,233 - 241,409 lb) |
Dimensions
| Transport Length | 14,600 mm (47 ft 11 in) |
| Transport Width | 3,800 mm (12 ft 6 in) |
| Transport Height | 4,400 mm (14 ft 5 in) |
| Track Gauge | 2,700 mm (8 ft 10 in) |
Performance
| Travel Speed (High/Low) | 5.5 / 3.2 km/h (3.4 / 2.0 mph) |
| Gradeability | 70% (35°) |
| Bucket Capacity (Backhoe) | 3.4 - 6.7 m³ (4.5 - 8.8 cu yd) |
| Bucket Capacity (Loading Shovel) | 6.5 m³ (8.5 cu yd) |
Service capacities (summary)
| Fuel Tank | 1,200 L (317 gal) |
| Hydraulic System | 500 L (132 gal) |
| Engine Oil | 45 L (11.9 gal) |
| Cooling System | 100 L (26.4 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu H185S-1(S/N G06122) 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 G06122) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor wear metals in the hydraulic system and engine oil. Check coolant SCA concentration levels at 500 hours to prevent scaling and corrosion in the H185S-1 cooling circuits. Monitor hydraulic oil viscosity and particle count to detect pump or valve wear early. Track fuel dilution and soot levels in the engine oil to assess combustion efficiency and filter performance. Use KOMTRAX telematics data to correlate load frequency with fluid degradation rates for optimized sampling timing.
Corrective & Common Repairs
Address hydraulic hose leaks and cracked fittings promptly to maintain system pressure in the H185S-1. Replace worn track shoe bolts and adjust track tension to prevent excessive undercarriage wear. Inspect and replace worn boom and stick cylinder seals to prevent external leaks and loss of lifting force. Check swing bearing bolts and gear teeth for pitting or wear to ensure stable rotation. Replace fuel filters and water separators regularly to protect the injection system from contamination.
Overhaul & Rebuild Points
Plan major undercarriage overhaul when track pitch elongation or roller wear exceeds factory limits. Rebuild hydraulic pumps and motors when flow rates drop below specification or internal leakage increases. Inspect final drive gears and bearings for pitting or scoring during the 1000-hour service interval. Evaluate the engine for compression loss or excessive blow-by to determine the need for a top-end overhaul. Check the swing machinery oil for metal content to decide on planetary gear rebuild.
Seasonal & Environment Servicing
In cold climates, verify coolant freeze protection and use low-temperature hydraulic fluids to ensure proper flow. Clear debris from radiator and oil cooler fins frequently to prevent overheating in dusty mining environments. Inspect air intake systems for blockages that restrict airflow to the engine. Check battery hold-downs and terminals for corrosion, especially in high-humidity or saline conditions. Adjust track tension based on ground conditions to prevent digging into soft terrain or damaging tracks on hard rock.
H185S-1(S/N G06122) 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 G06122) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or pump lines |
| CA441 | Battery voltage too low | Alternator or battery failure; voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| 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 malfunction | Change hydraulic filter and oil; check cooler fan |
| CA111 | Internal engine controller fault | ECM internal failure | Replace or reprogram the ECM |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| CA122 | Intake air pressure high voltage | Intake pressure sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA153 | Intake air temperature sensor error | Faulty IAT sensor | Replace or test the IAT sensor |
| CA428 | Fuel moisture sensor invalid voltage | Contaminated fuel supply or sensor harness fault | Ensure a clean fuel supply and check the moisture sensor harness |
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 G06122) attachments & work tools
Loading Shovel Buckets
Factory configurations for the H185S-1 series include loading shovel buckets designed for top-loading applications. Typical capacities for this class range from 6.5 m³ (8.5 cu yd) to larger volumes depending on the specific boom and stick geometry. These buckets are optimized for high-density material handling in mining environments.
Backhoe Buckets
The H185S-1 platform supports backhoe bucket configurations for general excavation and overburden removal. Standard bucket capacities for this machine class typically fall between 3.4 m³ (4.5 cu yd) and 6.7 m³ (8.8 cu yd). The selection depends on the specific stick length and boom arrangement installed on the chassis.
Coupler and Mounting Systems
The machine utilizes a fixed-pin or quick-coupler mounting interface at the end of the boom stick assembly to secure the bucket. Hydraulic lines are routed through the boom and stick to the coupler to enable auxiliary functions such as bucket tilt or side-shift if equipped. Specific coupler hardware varies by the original factory configuration of the stick end.
Hydraulic Kit Requirements
Work tools requiring auxiliary functions, such as tilt rotators or specialized grapples, require a dedicated hydraulic kit installed within the boom or stick. This kit includes control valves, pilot lines, and hydraulic hoses to route flow from the main pump to the attachment. Availability and specific kit part numbers vary by configuration and serial range.
Factory Guarding and Wear Protection
Factory options for the H185S-1 include side cutters, bottom plates, and side plates to protect the bucket structure in abrasive conditions. These wear parts are often bolt-on or weld-on assemblies designed to extend bucket life. Specific guarding configurations depend on the material being handled and the original equipment specification.
All H185S-1(S/N G06122) assemblies by section
Every catalogued assembly group for the Komatsu H185S-1(S/N G06122). 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 G06122) : * = Variations From Page :
Komatsu : H185s-1(S/N G06122) : * = 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 G06122) : * = 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 G06122) : * = Variations From Page : : Frame
| 00***98 | Test Coupling | 5 |
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 4 |
Komatsu : H185s-1(S/N G06122) : * = Variations From Page : : Grease (Molub Alloy 936, Artic-T2-Sf)
| 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 G06122) : * = Variations From Page : : Wear And Tear Parts
| 26***40 | Catch | 5 |
| 32***40 | Corner Adapter | 1 |
| 32***40 | Corner Adapter | 1 |
Air Condit. System, Heater
Komatsu : H185s-1(S/N G06122) : Air Condit. System, Heater : -Compressor
| 25***40 | Compressor, Assembly | 1 |
| 69***73 | Upstroke Valve | 1 |
| 69***73 | Valve | 1 |
Komatsu : H185s-1(S/N G06122) : Air Condit. System, Heater : -Coupling
| 32***99 | Threaded Pin | 1 |
| 33***99 | Nut | 8 |
| 49***40 | Clutch Assembly | 1 |
Komatsu : H185s-1(S/N G06122) : Air Condit. System, Heater : -H.P. Filter
| 59***40 | Hydraulic. Filter Assembly | 1 |
| 60***40 | Plug | 1 |
| 60***40 | Seal | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 |
| 30***99 | Screw | 10 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Air Condit. System, Heater : Hydr. For Air Conditioning System
| 00***98 | Union | 3 |
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Pressure Relief Valve | 1 |
Annex
Komatsu : H185s-1(S/N G06122) : Annex : Colour Basic Machine :
Komatsu : H185s-1(S/N G06122) : Annex : Electric Schematics :
Komatsu : H185s-1(S/N G06122) : Annex : Hydraulic Schematics :
Komatsu : H185s-1(S/N G06122) : Annex : Tools And Accessories
Backhoe Equipment
Komatsu : H185s-1(S/N G06122) : Backhoe Equipment : Backhoe
| 26***40 | Catch | 5 |
| 32***40 | Corner Adapter | 1 |
| 32***40 | Corner Adapter | 1 |
Komatsu : H185s-1(S/N G06122) : Backhoe Equipment : Basic Boom Cylinder
| 31***99 | Screw | 4 |
| 36***99 | O-Ring | 1 |
| 49***40 | Connector Plate | 1 |
Komatsu : H185s-1(S/N G06122) : Backhoe Equipment : Boom
| 00***98 | O-Ring | 40 |
| 30***40 | Weld On Angle | 4 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06122) : Backhoe Equipment : Bucket Cylinder
| 00***98 | Seal Ring | 1 |
| 30***99 | Bolt | 8 |
| 31***99 | Bolt (Standard) | 16 |
Komatsu : H185s-1(S/N G06122) : Backhoe Equipment : Hydr. Cylinder
| 00***98 | Grease Nipple | 3 |
| 00***98 | O-Ring | 1 |
| 22***40 | Seal Kit | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Backhoe Equipment : Stick Cylinder
| 00***98 | O-Ring | 1 |
| 30***40 | Connecting Block | 1 |
| 30***99 | Bolt | 2 |
Drive
Komatsu : H185s-1(S/N G06122) : Drive
Komatsu : H185s-1(S/N G06122) : Drive : -Air Cleaner
| 33***99 | Nut | 20 |
| 34***99 | Washer | 20 |
| 34***99 | Lock Washer | 20 |
Komatsu : H185s-1(S/N G06122) : Drive : -Coupling
| 30***99 | Bolt | 10 |
| 30***99 | Screw | 26 |
| 34***99 | Dowel Sleeve | 24 |
Komatsu : H185s-1(S/N G06122) : Drive : -Diesel Engine
| 60***40 | Diesel Engine | 1 |
| 69***73 | Seal Ring | 4 |
| 69***73 | Water Pump | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Drive : -Hydr. Pump
| 17***40 | Screw Plug | 2 |
| 17***40 | Union | 3 |
| 18***40 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Drive : -Pump Distributor Gear
| 00***98 | O-Ring | 1 |
| 08***54 | O-Ring | 2 |
| 08***21 | O-Ring | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Drive : Air Cleaning System
| 14***40 | Maintenance Switch | 2 |
| 22***40 | Accordion Hose | 1 |
| 22***40 | Accordion Hose | 2 |
Komatsu : H185s-1(S/N G06122) : Drive : Cold Start System
| 28***40 | Bracket | 1 |
| 30***99 | Screw | 4 |
| 33***99 | Nut | 4 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Drive : Engine : Cummins-Diesel
Komatsu : H185s-1(S/N G06122) : Drive : Exhaust System
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 8 |
| 30***99 | Bolt 35 Lg | 16 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Drive : Fuel Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 17***40 | Screw Plug | 1 |
Komatsu : H185s-1(S/N G06122) : Drive : Output :
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Drive : Radiator Arr.
| 00***98 | Clamp | 4 |
| 00***98 | Union | 1 |
| 08***40 | Quick Disconnect Coupling | 1 |
Komatsu : H185s-1(S/N G06122) : Drive : Serial-No. :
Komatsu : H185s-1(S/N G06122) : Drive : Series :
Komatsu : H185s-1(S/N G06122) : Drive : Type :
Electric
Komatsu : H185s-1(S/N G06122) : Electric : Batteries With Cables
| 05***40 | Rubber Grommet | 4 |
| 14***40 | Cable Shoe | 16 |
| 15***40 | Battery Switch | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : 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 G06122) : General View : General View Backhoe Equipment
Komatsu : H185s-1(S/N G06122) : General View : General View Undercarriage
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Hydraulic : --Regulating Valve
| 31***99 | Screw | 1 |
| 34***99 | Circlip | 1 |
| 34***99 | Lock Washer | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : --Throttle Check Valve
| 00***98 | O-Ring | 2 |
| 18***40 | O-Ring | 1 |
| 31***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Aeration Filter
| 33***99 | Nut | 1 |
| 44***40 | Aeration Filter, Assembly | 1 |
| 69***89 | Socket Housing | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Anticavitation Valve
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Control Block
| 16***40 | Release Valve | 3 |
| 31***99 | Eye Bolt | 2 |
| 31***99 | Bolt | 24 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Control Valve, Load Limit
| 25***40 | Control Valve, Load Limit Assembly. 30 Bar | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Filter
| 59***40 | Hydraulic. Filter, Assembly | 1 |
| 60***40 | Plug | 1 |
| 60***40 | Seal | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -H.P. Filter
| 31***99 | Screw | 4 |
| 34***99 | Lock Washer | 4 |
| 34***40 | Gasket | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Hydr. Motor
| 31***99 | Screw | 2 |
| 31***99 | Screw | 4 |
| 32***40 | Hydraulic.-Motor, Assembly | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Pressure Relief Valve
| 31***99 | Plug | 1 |
| 31***99 | Eyebolt | 2 |
| 31***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : -Pressure Valve
| 36***99 | O-Ring | 2 |
| 36***40 | Support Ring | 2 |
| 62***40 | Pressure Valve | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Return Oil Filter
| 10***65 | O-Ring | 1 |
| 33***99 | Nut | 2 |
| 33***99 | Nut | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Slew-Brake Valve
| 00***98 | O-Ring | 2 |
| 25***40 | Valve Disk | 4 |
| 25***40 | Compression Spring | 4 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Throttle Check Valve
| 18***40 | O-Ring | 1 |
| 31***99 | Bolt | 4 |
| 33***99 | Nut | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : -Valve Block
| 15***40 | Test - Screw Coupling | 1 |
| 25***40 | Screw Plug | 2 |
| 31***99 | Plug | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : Control Blocks - Manifold
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
| 31***99 | Bolt (Standard) | 96 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : Control Plate
| 00***98 | Test Coupling | 5 |
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 4 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Header (Return)
| 00***98 | Half Flange | 12 |
| 00***98 | Flange Seal | 6 |
| 17***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : Lines :
Komatsu : H185s-1(S/N G06122) : Hydraulic : Main Oil Tank
| 00***98 | O-Ring | 5 |
| 00***98 | O-Ring | 4 |
| 00***98 | Union | 2 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Manifold
| 31***99 | Socket Head Cap Screw | 64 |
| 33***99 | Nut | 28 |
| 35***40 | Flange Seal | 30 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : Oil Cooler Arr.
| 25***40 | Hv-Washer | 20 |
| 30***99 | Bolt (Standard) | 10 |
| 30***99 | Bolt | 2 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Hydraulic : Pump Control
| 00***98 | Socket | 3 |
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Pump Lubrication
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 1 |
| 31***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Pumps - Control Blocks
| 15***40 | Test - Screw Coupling | 3 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 6 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Rotary Joint
| 00***98 | Socket | 1 |
| 30***99 | Screw | 8 |
| 30***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Slew Gear
| 00***98 | Union | 1 |
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Suction Lines
| 00***98 | O-Ring | 1 |
| 00***98 | Half Flange | 2 |
| 00***98 | Flange Seal | 1 |
Komatsu : H185s-1(S/N G06122) : Hydraulic : Suction Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 30***99 | Screw | 8 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : Lubrication- And Refueling Equipment : Electr. Parts
| 04***40 | Dust Cap | 3 |
| 04***40 | Plug | 3 |
| 14***40 | Socket | 3 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : Lubrication- And Refueling Equipment : Stick - Backhoe Equipment - Lube Lines, 5 M
| 00***98 | Clamp 15/15 | 9 |
| 00***98 | Clamp 18/15 | 4 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
Operator'S Cab
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Operator'S Cab : -Operator'S Seat
| 30***99 | Bolt | 2 |
| 31***99 | Screw | 4 |
| 34***99 | Washer | 6 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : Operator'S Cab : Colour :
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : Operator'S Cab : Operator'S Cab Arr.
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Operator'S Cab : Protection Roof
| 30***99 | Screw | 8 |
| 30***99 | Bolt Standard | 4 |
| 31***99 | Washer | 4 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Slew Ring : --Brake
| 31***99 | Screw Plug | 8 |
| 34***99 | Seal Ring | 8 |
| 34***99 | Circlip | 1 |
Komatsu : H185s-1(S/N G06122) : Slew Ring : -Hydr. Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 |
Komatsu : H185s-1(S/N G06122) : Slew Ring : Slew Ring Protection
| 30***99 | Srew | 26 |
| 50***40 | Cover | 5 |
| 51***98 | Resilient Sleeve 13/25x50 | 26 |
Superstructure
Komatsu : H185s-1(S/N G06122) : Superstructure : Covering, Engine Housing
| 08***40 | Silent Block | 1 |
| 30***99 | Screw | 4 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Superstructure : Pin, Boom - Counterweight
| 26***40 | Washer | 8 |
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06122) : Superstructure : Rails And Platforms
| 27***40 | Grating 420x1650 | 1 |
| 27***40 | Grating | 1 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 G06122) : 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 |
Temperature Conditio- Ning
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : -Coolant Preheating Arr.
| 63***40 | Coolant Preheating Arr | 1 |
| 69***73 | Nipple | 2 |
| 69***73 | Hose | 1 |
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : -Switch Box
| 69***85 | Clamp 75 Amp | 3 |
| 69***86 | Clamp 25 Amp | 6 |
| 69***87 | Fuse Holder | 20 |
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : Coolant Preheating Arr.
| 26***40 | Hose Fittings | 2 |
| 26***40 | Universal Sealing Head | 1 |
| 30***99 | Screw | 2 |
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : Switch Box
| 25***40 | Junction Cabinet (Empty Box) | 1 |
| 27***40 | Cable Union Pg 21 | 1 |
| 32***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : Temperature Conditioning
| 27***40 | Cable Protection Hose Pg 21 Bulk Ware, State Length Required | 0 |
| 44***40 | Cable Protection Hose Pg 16 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06122) : Temperature Conditio- Ning : Temperature Conditioning, Oil Tank And Engine
| 05***40 | Ground Wire - Series Terminal | 10 |
| 25***40 | Flange | 5 |
| 25***40 | Housing, Empty | 1 |
Undercarriage
Komatsu : H185s-1(S/N G06122) : Undercarriage : --Brake
| 00***98 | Shaft Seal | 2 |
| 31***99 | Plug | 9 |
| 33***99 | Seal Ring | 9 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : -Gear
| 00***98 | Shaft Seal | 2 |
| 08***95 | Shaft Seal | 2 |
| 30***99 | Bolt | 12 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : -Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : Bottom Roller
| 30***99 | Bolt | 8 |
| 32***40 | Plug | 1 |
| 32***40 | Plug | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Undercarriage : Hydraulic
Komatsu : H185s-1(S/N G06122) : Undercarriage : Idler Assy.
| 30***99 | Screw | 8 |
| 31***40 | Axle Stirrup | 4 |
| 31***99 | Washer | 8 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : Rotary Joint
| 16***40 | Screw Plug | 4 |
| 20***40 | Screw Plug | 2 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : Side Frame
| 22***40 | Lifetime Seal | 4 |
| 25***40 | Hv-Washer | 80 |
| 30***99 | Bolt 200lg. (Standard) | 64 |
Komatsu : H185s-1(S/N G06122) : Undercarriage : Top Roller
| 31***99 | Plug | 1 |
| 34***99 | Dowel Pin | 2 |
| 42***40 | Pin | 1 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Undercarriage : Track Group
| 33***99 | Nut (Standard) | 184 |
| 34***99 | Washer | 368 |
| 44***40 | Bolt | 184 |
Komatsu : H185s-1(S/N G06122) : 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 G06122) : Undercarriage : Undercarriage
| 00***98 | Union | 2 |
| 30***99 | Bolt | 8 |
| 31***99 | Socket Head Cap Screw | 16 |
Komatsu : H185s-1(S/N G06122) : 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 model designation varies by production year and regional emissions configuration.
What is the operating weight of the Komatsu H185S-1?
The operating weight ranges from 106,700 kg (235,240 lb) to 109,500 kg (241,410 lb), varying by configuration and counterweight setup.
What model replaced the Komatsu H185S-1?
The Komatsu H185S-2 succeeded the H185S-1 in the hydraulic shovel lineup.
What H185S-1(S/N G06122) owners discuss
What are the typical powertrain and hydraulic behaviors for the Komatsu H185S-1 series?
The H115S-1 series is engineered for smooth operation and high fuel efficiency. A common diagnostic pattern is that if all hydraulic functions (boom, arm, bucket, swing, travel) become slow simultaneously, the issue is likely a shared cause such as low hydraulic oil level, clogged filters, or engine speed loss, rather than a single pump failure. If only one function is slow, the main pump is less likely the culprit; investigate the specific cylinder, control valve, or hose. Performance that is strong when cold but weak when hot indicates internal leakage in the pump, main control valve, or cylinders due to decreased oil viscosity at operating temperature. The hydraulic system relies on precise pressure regulation; a faulty main safety valve can cause slow heating and general system sluggishness. Note: The H185S-1 is a hydraulic shovel configuration, distinct from the PC-series excavators, and shares the Komatsu hydraulic philosophy of smooth, efficient flow control. Verify specific pressure settings for the H185S-1 series with your dealer, as they vary by configuration/series.
What undercarriage and wear patterns are typical for this machine type?
Komatsu undercarriage components, including track pads, bushings, and bearings, are subjected to significant wear and tear. Worn bushings often lead to increased noise and vibration, while worn bearings can cause premature track failure. The track tensioner and idler system requires regular inspection to prevent repeated loosening. General wear patterns indicate that components may degrade due to environmental factors like dust and moisture. Proper lubrication of moving parts is essential to reduce friction and extend lifespan. If the machine pulls to one side while traveling, check mechanical resistance, track tension, and debris packing in the undercarriage before diagnosing travel motor issues. Test the symptom in both forward and reverse to isolate hydraulic versus mechanical causes.
What are the common engine quirks and issues for the Komatsu H185S-1 series?
Engine performance issues are a primary concern. Loss of power under heavy digging load often points to airflow restriction (clogged air filter, damaged charge-air hoses) or fuel delivery problems (clogged fuel filters, water in fuel). Overheating during heavy excavation is frequently caused by debris packed between the radiator, hydraulic oil cooler, and charge-air cooler. A machine that idles normally but loses power when hydraulics are engaged may have an engine unable to produce expected power or a hydraulic system placing excessive load. Black smoke from the exhaust can indicate incomplete combustion due to fuel or air issues. Engine speed drops should be tested against the engine's output power first. Note: The specific engine model for the H185S-1(S/N G06122) is not detailed in the provided sources; verify the exact engine designation with your dealer.
What are the common electrical and sensor issues reported for Komatsu machines?
Komatsu machines 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 that machines may not start due to battery state of charge, loose terminals, or faulty grounds. If the engine cranks but does not start, check for air in the fuel supply or recent filter replacement errors. Multiple fault codes often point to battery, ground, or connector issues. The machine may derate suddenly due to engine or aftertreatment warnings. Note: Specific sensor locations and fault codes for the H185S-1(S/N G06122) are not detailed in the provided sources; verify with your dealer.
What should be checked when buying a used Komatsu H185S-1(S/N G06122)?
When evaluating a used H185S-1(S/N G06122), prioritize the following checks: 1. Hydraulic System: Test all functions cold and hot. Weakness when hot indicates internal leakage. Check for leaks in lines and cylinders. 2. Engine: Inspect for black smoke, overheating, and power loss under load. Check coolant level and radiator cleanliness. 3. Undercarriage: Measure track tension, inspect track pads, bushings, and bearings for wear. Check for pulling to one side. 4. Electrical: Verify battery health, ground connections, and dashboard functionality. Check for multiple fault codes. 5. Fluids: Check hydraulic oil condition and level. Ensure correct fluid specifications are used. 6. Serial Verification: Confirm the serial number G06122 matches the machine's data plate. Note: Specific fluid capacities and engine specs for this serial range are not documented in the provided sources — verify with your dealer.
What are the recommended hydraulic and engine fluid specifications?
Komatsu equipment requires specific fluid types for optimal performance and component life. Use Komatsu Genuine Lubricants and Coolants or equivalents meeting Komatsu specifications. For hydraulic systems, use Komatsu hydraulic oil (e.g., Komatsu EO, TO, AXO, HO series) as specified in the maintenance manual. For the engine, use Komatsu diesel engine oil meeting the appropriate viscosity and service classification. Coolant should be Komatsu Super-coolant AF-NAC or equivalent. Note: Exact fluid capacities and specific product codes for the H185S-1(S/N G06122) are not detailed in the provided sources — verify with your dealer.
What safety-critical fixes or inspections are recommended for the H185S-1 series?
Safety-critical inspections include verifying the main safety valve operation, as a faulty valve can cause system pressure issues and slow heating. Check the swing brake system to ensure the upper structure holds position and does not drift. Inspect track tension and undercarriage components to prevent track derailment. Verify all safety interlocks and neutral-start inputs function correctly. Check the cooling system for blockages to prevent overheating-related failures. Note: Have your dealer verify all safety-critical fixes and pressure settings for the H185S-1(S/N G06122), as specific values vary by configuration/series.
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 G06122). 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 G06120)H185S-1(S/N G06121)
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