Komatsuhydraulic shovels(no series)
Komatsu H185S-1(S/N G06081)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu H185S-1 (S/N G06081) is a roughly 216-tonne (476,200 lb) class hydraulic mining shovel, originally engineered by Mannesmann Demag and carried into the Komatsu line after Komatsu's 1996 joint venture with Demag and its full 1999 takeover of the business. Factory-standard configuration is a face/front shovel with a heaped bucket capacity around 14 m3 (18.3 yd3), and this unit runs a Cummins KTTA38-C1350 V12 diesel rated roughly 840 kW (1,125 hp) at 1800 rpm, a mechanical PT-fuel-system engine that predates electronic engine control. The model followed the earlier H185 (introduced 1983, roughly 190 t / 11 m3 bucket) as a stronger, higher-capacity development within the same Demag H-series shovel line, which also spanned the larger H285S, H485, and H655/H685SP shovels. Units of this type were built into the early 1990s, and beyond the standard face-shovel arrangement, the line was also offered as a factory backhoe (pull-shovel) conversion for below-grade digging.
What set the H185S apart from earlier Demag shovels in this weight class is its electronic-over-hydraulic pilot control: joystick commands for boom, stick, and swing pass through an electronic control loop to the pump rather than through straight hydraulic pilot lines, a departure from the hydraulic-over-hydraulic control used on most large shovels of its era. Komatsu phased the Demag-heritage H-series name out of new production through the 2000s as its own PC-series mining shovels expanded, with the PC3000 standing as the closest size-equivalent in Komatsu's current mining excavator range, though no source documents a single named model as this shovel's direct successor. In the used and parts market today, surviving H185S-1 units are valued as durable, still-working production shovels, with operators reporting examples still loading haul trucks well over a decade after new. Factory parts support for this Demag-heritage line has wound down in favor of newer Komatsu-badged shovels, so fleets running these machines long-term tend to buy up spare hydraulic and drive components proactively rather than wait on long lead times.
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 G06081) specifications
Engine
| Engine model | Cummins KTTA38-C1350, a mechanical V12 diesel with a PT fuel system, per the machine's parts and technical documentation. It predates electronic engine control. |
| Gross/net power | Approximately 840 kW (1,125 hp) at 1800 rpm, per the machine's parts and technical documentation. |
| Displacement | Not documented in available sources. |
| Cylinders | 12 (V12 configuration). |
| Emissions tier | Not applicable / not documented. This is a mechanical, pre-electronic-control engine of early-1990s design, predating modern off-highway emissions tier regulation. |
Weights
| Operating weight | Approximately 216 t (476,200 lb) in face-shovel configuration. This figure is reported for the H185S model line generally, not confirmed as specific to S/N G06081. |
| Operating weight (backhoe configuration) | Not documented. The H185S line was also built as a backhoe/mass-excavation configuration, but a separate weight figure for that configuration was not found. |
| Shipping weight | Not documented in available sources. |
| Ground pressure | Not published for this model in available sources. |
Dimensions
| Transport length/width/height | Not documented for this model/serial in available sources — verify with dealer or OEM spec sheet. |
| Track gauge | Not documented in available sources. |
| Ground clearance | Not documented in available sources. |
| Other class-relevant dimensions | Not documented in available sources. |
Performance
| Bucket capacity | Approximately 14 m3 (18.3 yd3) in face-shovel configuration, reported for the H185S model line generally at its market introduction. Not confirmed as specific to S/N G06081. |
| Travel speed | Not documented in available sources. |
| Gradeability | Not published for this model in available sources. |
| Dig/dump performance (reach, height, depth) | Not documented for this model/serial in available sources. |
Service capacities (summary)
| Fuel tank | Not documented in available sources. |
| Hydraulic system | Not documented in available sources. |
| Engine oil | Not documented in available sources. |
| Cooling system | Not documented in available sources. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
H185S-1(S/N G06081) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) - Cummins KTTA38-C1350 diesel, rated 840 kW at 1800 rpm | Not documented in public sources for this exact serial range (S/N G06081). The KTTA38-series V12 is a large mining-class engine; comparable KTA38/KTTA38 applications commonly run in the 150-230 L (39.6-60.8 US gal) band for a full system fill including filters, but this is a general range, not a confirmed H185S-1 figure - varies by oil pan and cooler configuration. Verify against the dipstick marks or dealer OMM for S/N G06081. | Komatsu Genuine diesel engine oil (EO series) or an oil meeting Cummins' own heavy-duty diesel spec, graded by ambient temperature per the standard chart - SAE10W in cold climates, SAE30 or SAE10W-30 in temperate climates, SAE40 or SAE15W-40 in hot climates. Use an oil meeting at minimum API CI-4. |
| Cooling system (radiator and engine block) - Cummins KTTA38-C1350 | Not documented in public sources for this exact serial range. Not reliably inferable from generic KTA38 data since radiator/aftercooler circuit size on a mining shovel differs from truck or genset packaging - varies by configuration/series. Confirm against the radiator fill mark or dealer OMM for S/N G06081. | Komatsu Supercoolant AF-NAC (or an equivalent long-life ethylene-glycol antifreeze/corrosion inhibitor package), mixed with clean water per the label ratio for year-round freeze and corrosion protection. |
| Fuel tank | Not documented in public sources for this exact serial range. Confirm the tank capacity from the machine nameplate or dealer OMM for S/N G06081. | No. 2 diesel fuel meeting the engine manufacturer's fuel specification; use low-sulfur diesel matched to local emissions requirements. Avoid mixing with used oil or gasoline. |
| Swing gear and travel/drive gearbox lubrication | Not documented in public sources for this exact serial range. The parts documentation for this machine describes a centralized lubrication distribution system with metering valves feeding swing and travel gear points, but no refill volume is published in available sources. | Gear oil per the OMM lubrication chart, graded by ambient temperature. Confirm exact grade and viscosity with the dealer OMM for S/N G06081 before service. |
| Final drives / travel gearboxes (each side) | Not documented in public sources for this exact serial range. | Gear oil per the OMM lubrication chart. Confirm grade and fill volume with the dealer OMM for S/N G06081. |
| Hydraulic system and main oil tank | Not documented in public sources for this exact serial range. This is a large mining-class hydraulic shovel (roughly 216-tonne class per published weight figures), so the main tank and system total are large, but no verified liter figure could be confirmed - varies by configuration/series. Verify against the tank sight gauge or dealer OMM for S/N G06081. | Komatsu Genuine hydraulic oil (HO series) or an equivalent ISO VG hydraulic fluid graded by ambient temperature per the OMM chart. Confirm exact grade with the dealer OMM for S/N G06081. |
| Grease points (swing bearing, boom/arm pins, bucket linkage) - spec only | Spec only - no refill volume is published for this unit. The machine's centralized lubrication system references multiple grease grades keyed to ambient-temperature zones, but the exact product names and drop sizes are not confirmed in available sources. | Komatsu Genuine or equivalent multipurpose EP grease (NLGI No. 2 for general points), with a lower-consistency cold-weather grade substituted for sub-zero climates per the OMM lubrication chart. Confirm exact grade per temperature zone with the dealer OMM for S/N G06081. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu H185S-1(S/N G06081) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 8,000 h |
|
Servicing the H185S-1(S/N G06081) beyond the schedule
Predictive Maintenance & Fluid Analysis
With a mechanical PT-fuel Cummins KTTA38-C1350 and no engine ECM, fluid sampling is the primary early-warning tool on this shovel. Pull engine oil, hydraulic oil, and swing/final-drive gear oil samples on a fixed schedule and track wear-metal trends rather than waiting for a visible leak. Because pump and function control runs through an electronic-over-hydraulic loop, cycle every function under load at each inspection and log any sluggish or uneven response as an early flag on the control unit or harness, not just the pump.
Corrective & Common Repairs
Expect face-shovel duty-cycle wear at bucket teeth, adapters, and lip shrouds, plus boom and stick pin/bushing wear from constant dig-swing-dump motion. Swing gear and slew ring play accelerates with this cycle, so listen for chatter during rotation. On the electronic-over-hydraulic control loop, a corroded connector or chafed harness shows up as sluggish or uneven function response rather than a dead function - check wiring and the control unit before condemning a pump. The KTTA38-C1350's PT fuel pump is sensitive to field-refueling contamination.
Overhaul & Rebuild Points
Major rebuild candidates are the undercarriage - track shoes, rollers, idlers, and sprockets worn by abrasive mining ground - the slew ring once gear-tooth or bolt-hole wear reach limits, and the main hydraulic pumps and swing/travel motors. The KTTA38-C1350 is a rebuildable mechanical engine; base inframe or major overhaul timing on oil-analysis trends rather than a fixed hour figure. Inspect boom, stick, and bucket weldments for fatigue cracking at every major service, and check the front-end conversion pins and bushings if this unit runs the factory backhoe arrangement.
Seasonal & Environment Servicing
Pit dust loads accelerate air filter and cooler-core service on this class of shovel; check and clean radiator and oil cooler fins more often in dry, dusty operation to protect the KTTA38-C1350 from overheating. In cold climates, plan on block heaters and starting aids since this mechanical PT-fuel engine has no electronic cold-start assist. Shorten auto-lube system checks and grease-point service on boom, stick, bucket, and swing-bearing pins in temperature extremes, and drain fuel/water separators more often in wet-season operation.
H185S-1(S/N G06081) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 692 306 | By-Pass - Oil Filter Cartridge, Diesel Engine | Lubrication service | Check fitment → |
| 358 601 40 | Return Oil Filter, Assembly | Lubrication service | Check fitment → |
| 256 911 40 | Sealing Element | Scheduled service item | Check fitment → |
| 440 479 40 | Aeration Filter, Assembly | Scheduled service item | Check fitment → |
| 358 254 40 | Filter, Assembly | 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 G06081) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine oil pressure lamp (red pictograph + buzzer, no numeric code) | Engine lube oil pressure has dropped below the safe minimum | Low oil level, clogged oil filter, worn oil pump, or a failed pressure sender | Stop the engine immediately, check oil level and filter condition before restarting |
| Coolant temperature lamp (red pictograph + buzzer, no numeric code) | Engine coolant temperature has exceeded the safe operating range | Low coolant level, blocked radiator core, slipping fan belt, or thermostat failure | Idle down, let the machine cool, then check coolant level and radiator condition |
| Alternator/charge lamp (red pictograph, no numeric code) | Charging circuit is not supplying the battery system | Broken or slipping alternator belt, faulty alternator, or a wiring/connector fault | Check belt tension first, then test alternator output and wiring |
| Hydraulic oil temperature lamp (red pictograph + buzzer, no numeric code) | Main hydraulic oil temperature has exceeded the safe operating range | Low oil level, blocked oil cooler, failing cooling fan, or sustained high-load digging in hot ambient conditions | Reduce workload or idle down, check oil level and cooler fins/core once safe to inspect |
| Hydraulic filter restriction indicator (mechanical pop-up button or lamp, no numeric code) | Return-line or pilot hydraulic filter is loading up and restricting flow | Filter element reaching its service interval or contaminated hydraulic oil | Replace the affected filter element and check oil cleanliness |
| Air cleaner restriction indicator (mechanical vacuum gauge or lamp, no numeric code) | Engine air filter is loading up and restricting intake airflow | Dirty or clogged primary air filter element | Inspect and clean or replace the air filter element |
| Fuel level low warning (gauge/lamp, no numeric code) | Fuel tank level has dropped to reserve | Normal consumption approaching an empty tank | Refuel; if the lamp stays lit with a full tank, check the sender unit and wiring |
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 G06081) attachments & work tools
Face shovel bucket
The H185S-1 leaves the factory fitted as a face/front shovel, and the bucket is its primary and effectively only interchangeable work tool. Heaped bucket capacity for this class runs roughly 11-14 m3 depending on generation and bucket profile ordered, sized to load large rigid-frame haul trucks in a handful of passes rather than for finish grading.
Backhoe conversion
A factory conversion arrangement is documented for this model line, allowing the front-shovel boom/stick/bucket linkage to be swapped to a backhoe (pull-shovel) configuration for below-grade digging. Backhoe bucket capacity is not separately published for this exact serial range; expect a bucket sized to the same duty class as the shovel bucket, chosen at conversion time to suit the dig geometry.
Bucket mounting and coupler system
Buckets pin and bolt directly to the stick/linkage lugs; no hydraulic quick-coupler is offered or expected at this weight class. Swapping between shovel and backhoe buckets, or between digging profiles, is a shop task done with pins and fasteners, not a field quick-attach change.
GET and bucket wear system
The shovel bucket lip uses a mining-duty ground-engaging-tool (GET) wear system: teeth, adapters, lip shrouds/protectors, and wear buttons or bars sized for high-abrasion digging. Reported tooth hardness for this bucket class runs in the roughly 480-520 HB range; these are wear items replaced on a running basis, not a factory option list.
Hydraulic arrangement notes
The main pumps and boom/stick/bucket circuits are dedicated to the digging and loading linkage of the shovel/backhoe front end. No auxiliary hydraulic circuit for hammer-, shear-, or grapple-type tools is documented for this class; the machine's role is bulk loading, not multi-tool utility work.
Factory and dealer configuration options
Documented configuration options for this class include an enclosed, climate-controlled operator cab (air conditioning and heater), a centralized automatic lubrication (auto-lube) system, and an engine-bay fire-suppression system. Undercarriage triple-grouser track shoes are offered in a range of widths to suit ground conditions, with roughly 80 cm (31.5 in) shoes reported on units of this class.
All H185S-1(S/N G06081) assemblies by section
Every catalogued assembly group for the Komatsu H185S-1(S/N G06081). 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 G06081) : * = Variations From Page :
Komatsu : H185s-1(S/N G06081) : * = Variations From Page : : Accumulator
| 00***98 | Test Socket | 2 |
| 18***40 | Pressure Relief Valve | 1 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06081) : * = 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 G06081) : * = Variations From Page : : Generator
| 49***40 | Diesel Engine | 1 |
| 69***73 | Seal Ring | 4 |
| 69***73 | Water Pump | 1 |
Komatsu : H185s-1(S/N G06081) : * = Variations From Page : : Pump, Modification Works
| 18***40 | Shaft Seal No Field Repair Item | 1 |
| 31***99 | Screw | 7 |
| 31***99 | Socket Head Cap Srew | 1 |
Air Condit. System, Heater
Komatsu : H185s-1(S/N G06081) : Air Condit. System, Heater : Cab Heater Arr.
| 25***40 | Breather Up To 06 122 | 2 |
| 25***40 | Hose Fittings, Straight | 2 |
| 25***40 | Moulding Material Bulk Ware, State Length Required | 0 |
Annex
Komatsu : H185s-1(S/N G06081) : Annex : Colour Basic Machine : Yellow
Komatsu : H185s-1(S/N G06081) : Annex : Electric Schematics :
Komatsu : H185s-1(S/N G06081) : Annex : Hydraulic Schematics :
Komatsu : H185s-1(S/N G06081) : Annex : Tools And Accessories
Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06081) : Bullclam Bucket Equipment : Basic Boom
| 00***98 | Mounting Clip | 6 |
| 00***98 | Mounting Clip | 8 |
| 00***98 | Mounting Clip | 9 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : Bullclam Bucket Equipment : Bullclam Bucket
| 00***98 | Grease Nipple | 2 |
| 00***98 | Half Flange | 16 |
| 00***98 | Half Flanged | 2 |
Komatsu : H185s-1(S/N G06081) : Bullclam Bucket Equipment : Bullclam Bucket Stick
| 00***98 | Mounting Clip | 10 |
| 00***40 | Clamp | 5 |
| 00***98 | Mounting Clip | 2 |
Komatsu : H185s-1(S/N G06081) : Bullclam Bucket Equipment : Hydr. Cylinder
| 00***98 | Grease Nipple | 2 |
| 00***98 | O-Ring | 1 |
| 22***40 | Support Ring | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Drive
Komatsu : H185s-1(S/N G06081) : Drive : -Air Cleaner
| 33***99 | Nut | 20 |
| 34***99 | Washer | 20 |
| 34***99 | Lock Washer | 20 |
Komatsu : H185s-1(S/N G06081) : Drive : -Coupling
| 30***99 | Bolt | 10 |
| 30***99 | Screw | 26 |
| 34***99 | Dowel Sleeve | 24 |
Komatsu : H185s-1(S/N G06081) : Drive : -Diesel Engine
| 49***40 | Diesel Engine | 1 |
| 69***73 | Seal Ring | 4 |
| 69***73 | Water Pump | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Drive : -Engine Saver 550
| 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 G06081) : Drive : -Hydr. Pump
| 00***98 | O-Ring | 2 |
| 17***40 | Screw Plug | 2 |
| 17***40 | Union | 3 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Drive : -Pump Distributor Gear
| 49***40 | Distributor Gear Assembly | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Drive : Air Cleaning System
| 14***40 | Maintenance Switch | 2 |
| 22***40 | Accordion Hose | 1 |
| 22***40 | Accordion Hose | 2 |
Komatsu : H185s-1(S/N G06081) : Drive : Cold Start System
| 28***40 | Bracket | 1 |
| 30***99 | Screw | 4 |
| 33***99 | Nut | 4 |
Komatsu : H185s-1(S/N G06081) : Drive : Engine Assy.
| 24***40 | Rail (Cold Weather Design) | 4 |
| 26***40 | Strip | 6 |
| 26***40 | Cover Tube For Sensor | 1 |
Komatsu : H185s-1(S/N G06081) : Drive : Engine : Cummins-Diesel
Komatsu : H185s-1(S/N G06081) : Drive : Exhaust System
| 26***40 | Compensator L=230mm | 2 |
| 30***99 | Bolt | 2 |
| 30***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : Drive : Fuel Tank
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
| 16***40 | Screw Plug | 1 |
Komatsu : H185s-1(S/N G06081) : Drive : Generator Arr.
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 1 |
| 31***99 | Washer | 2 |
Komatsu : H185s-1(S/N G06081) : Drive : Output :
Komatsu : H185s-1(S/N G06081) : Drive : Pump With Pump Distributor Gear Arr.
| 30***99 | Screw | 7 |
| 30***99 | Bolt | 4 |
| 30***99 | Bolt (Standard) | 24 |
Komatsu : H185s-1(S/N G06081) : Drive : Radiator Arr.
| 00***98 | Clamp | 4 |
| 00***98 | Union | 1 |
| 08***40 | Quick Disconnect Coupling | 1 |
Komatsu : H185s-1(S/N G06081) : Drive : Serial-No. :
Komatsu : H185s-1(S/N G06081) : Drive : Series :
Komatsu : H185s-1(S/N G06081) : Drive : Type :
Electric
Komatsu : H185s-1(S/N G06081) : Electric : -Head Lamp
| 00***98 | Bolt | 2 |
| 34***99 | Lock Washer | 2 |
| 35***40 | Headlamp, Without Lamp | 1 |
Komatsu : H185s-1(S/N G06081) : Electric : Batteries With Cables
| 14***40 | Cable Shoe | 8 |
| 15***40 | Battery Switch | 2 |
| 30***99 | Screw | 4 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Electric : Illumination On Option
| 00***98 | Clamp 15/15 | 60 |
| 05***40 | Cable Protection Hose Pg 7 Bulk Ware, State Length Required | 0 |
| 05***40 | Bulb 40 W | 5 |
Komatsu : H185s-1(S/N G06081) : 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 | 5 |
General View
Komatsu : H185s-1(S/N G06081) : General View : General View Bullclam Bucket Equipment
Komatsu : H185s-1(S/N G06081) : General View : General View Undercarriage
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : Hydraulic : --Pressure Relief Valve
| 10***65 | O-Ring | 1 |
| 46***40 | Valve, Assembly. (W/O Pressure Adjustment) | 1 |
| 50***98 | O-Ring | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : --Regulating Valve
| 31***99 | Screw | 1 |
| 34***99 | Circlip | 1 |
| 34***99 | Lock Washer | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : --Throttle Check Valve
| 00***98 | O-Ring | 2 |
| 18***40 | O-Ring | 1 |
| 31***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Aeration Filter
| 33***99 | Nut | 1 |
| 44***40 | Aeration Filter, Assembly | 1 |
| 69***89 | Socket Housing | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Anticavitation Valve
| 00***98 | O-Ring | 1 |
| 13***40 | O-Ring | 1 |
| 46***40 | Anticavitation Valve Assembly | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Control Block
| 16***40 | Release Valve | 3 |
| 31***99 | Eye Bolt | 2 |
| 31***99 | Bolt | 24 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Control Plate
| 00***98 | Plug | 3 |
| 26***40 | Union | 6 |
| 31***99 | Plug | 3 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Control Valve, Load Limit
| 25***40 | Control Valve, Load Limit Assembly. 30 Bar | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Filter
| 00***98 | O - Ring | 1 |
| 00***98 | O-Ring | 1 |
| 35***40 | Filter, Assembly | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -H.P. Filter
| 31***99 | Screw | 4 |
| 34***99 | Lock Washer | 4 |
| 34***40 | Gasket | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Hydr. Motor
| 31***99 | Screw | 2 |
| 31***99 | Screw | 4 |
| 32***40 | Hydraulic.-Motor, Assembly | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Hydraulic : -Return Oil Filter
| 10***65 | O-Ring | 1 |
| 33***99 | Nut | 2 |
| 33***99 | Nut | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : -Slew-Brake Valve
| 00***98 | O-Ring | 2 |
| 25***40 | Valve Disk | 4 |
| 25***40 | Compression Spring | 4 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Arr. Control Blocks And Manifold
| 15***40 | Test - Screw Coupling | 6 |
| 30***99 | Bolt (Standard) | 6 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Control Blocks - Manifold
| 31***99 | Bolt (Standard) | 96 |
| 35***40 | Flange Seal | 24 |
| 50***98 | Flange | 24 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Control Plate
| 00***98 | Test Coupling | 5 |
| 00***98 | Test Coupling | 1 |
| 00***98 | Union | 4 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Header (Return)
| 00***98 | Half Flange | 12 |
| 00***98 | Flange Seal | 6 |
| 17***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Lines And Valves For Oil Cooler
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 1 |
| 25***40 | Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Lines :
Komatsu : H185s-1(S/N G06081) : Hydraulic : Main Oil Tank
| 00***98 | O-Ring | 5 |
| 00***98 | Union | 2 |
| 00***98 | Union | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Manifold
| 00***98 | Half Flange | 2 |
| 00***98 | Union | 4 |
| 00***98 | Union | 2 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Oil Cooler Arr.
| 25***40 | Hv-Washer | 20 |
| 30***99 | Bolt (Standard) | 10 |
| 30***99 | Screw | 32 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Pressure Line - Pilot Oil Pump And Load-Sensing
| 00***98 | Union | 1 |
| 25***40 | Hose Nw 20x Ca. 1500 mm Bulk Ware, State Length Required | 0 |
| 27***40 | Socket | 2 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Pump Control
| 00***98 | Socket | 4 |
| 15***40 | Test - Screw Coupling | 1 |
| 18***40 | Screw Plug | 2 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Pump Lubrication
| 00***98 | Half Flange | 2 |
| 25***40 | Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required | 0 |
| 25***40 | Socket, From S/No: 06 085 | 4 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Pumps - Control Blocks
| 15***40 | Test - Screw Coupling | 3 |
| 30***99 | Bolt | 2 |
| 31***99 | Socket Head Cap Screw | 48 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Rotary Joint
| 00***98 | Socket | 1 |
| 30***99 | Bolt | 8 |
| 31***99 | Socket Head Cap Screw | 16 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Slew Gear
| 00***98 | Union | 1 |
| 26***40 | Hose Nw 10x Ca. 8000 mm Bulk Ware, State Length Required | 0 |
| 27***40 | Socket | 2 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Suction Lines
| 00***98 | O-Ring | 1 |
| 00***98 | Half Flange | 2 |
| 00***98 | Flange Seal | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Suction Tank
| 00***98 | Seal Ring | 1 |
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
Komatsu : H185s-1(S/N G06081) : Hydraulic : Valves For Control Blocks
| 00***98 | Union | 19 |
| 25***40 | Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required | 0 |
| 25***40 | Socket, From S/No: 06 085 | 2 |
Lubrication- And Refueling Equipment
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : --Pump
| 69***94 | Valve Cap | 1 |
| 69***95 | Gasket | 1 |
| 69***96 | Valve Kit | 1 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : -Lube Filter
| 41***40 | Lube Filter Assembly., 6-Fold | 1 |
| 69***32 | Ring | 6 |
| 69***33 | Union To The Lube Filters | 6 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : -Lube Pump
| 49***40 | Central Lubrication Assembly., 1-Line | 1 |
| 69***67 | Hose, Assembly. Nw 13x1520 Lg | 1 |
| 69***71 | Release Valve | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Lubrication- And Refueling Equipment : Boom - Lube Lines
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe ? 16x50 Lg. Bulk Ware, State Length Required | 0 |
| 28***40 | Reducing Socket | 4 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Central Lubrication-Bullclam
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
| 26***40 | Hose Ca. 3100 Lg. Bulk Ware, State Length Required | 0 |
| 30***99 | Screw | 16 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Drip Lube Pump Arr.
| 00***98 | Pin | 3 |
| 20***40 | Coupler Plug Nw 12.5 | 1 |
| 20***40 | Coupling Sleeve Nw 12.5 | 1 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Dropping Lubrication Assy.
| 00***98 | Test Union | 1 |
| 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 G06081) : Lubrication- And Refueling Equipment : Electr. Parts
| 04***40 | Dust Cap | 3 |
| 04***40 | Plug | 3 |
| 14***40 | Socket | 3 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Grease Barrel Crane
| 30***99 | Bolt (Standard) | 3 |
| 30***99 | Bolt | 4 |
| 30***99 | Bolt (Standard) | 6 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Hand Operated Lube Arr.
| 00***98 | Grease Nipple | 34 |
| 00***98 | Union | 34 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Hydr. For Drip Lubrication
| 00***98 | Test Coupling | 1 |
| 20***40 | Screw Plug | 1 |
| 25***40 | Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe | 1 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Hydr. For Lube Arr.
| 00***98 | Test Coupling | 1 |
| 20***40 | Screw Plug | 1 |
| 25***40 | Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe | 1 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Lube Distributor Swing Ring
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe ? 10x1000 Lg. Bulk Ware, State Length Required | 0 |
| 26***40 | Hose Assembly. Nw 20x2750 mm | 1 |
Komatsu : H185s-1(S/N G06081) : Lubrication- And Refueling Equipment : Lube Pump Arr.
| 00***98 | Pin | 3 |
| 20***40 | Coupler Plug Nw 12.5 | 1 |
| 20***40 | Coupling Sleeve Nw 12.5 | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Lubrication- And Refueling Equipment : Stick - Lube Lines
| 21***99 | Pipe ? 12 Ca 300mm Bulk Ware, State Length Required | 0 |
| 21***99 | Pipe ? 10x270 Lg. Bulk Ware, State Length Required | 0 |
| 26***40 | Hose Ca. 3100 Lg. Bulk Ware, State Length Required | 0 |
Operator'S Cab
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : Operator'S Cab : Cab Support
| 25***40 | Hv-Washer | 8 |
| 30***99 | Bolt | 6 |
| 30***99 | Bolt | 1 |
Komatsu : H185s-1(S/N G06081) : Operator'S Cab : Cabin Supercharger
Komatsu : H185s-1(S/N G06081) : Operator'S Cab : Colour : Light Grey
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : 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 G06081) : Operator'S Cab : Opertaor'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 G06081) : Operator'S Cab : Protection Roof
| 30***99 | Screw | 8 |
| 30***99 | Bolt Standard | 4 |
| 31***99 | Washer | 4 |
Komatsu : H185s-1(S/N G06081) : Operator'S Cab : Windscreen Washing Assy.
| 05***40 | Wiper Motor 120? | 1 |
| 19***40 | Diaphragm Pump | 1 |
| 19***40 | Water Reservoir | 1 |
Superstructure
Komatsu : H185s-1(S/N G06081) : Superstructure : Covering, Engine Housing
| 08***40 | Silent Block | 1 |
| 30***99 | Screw | 46 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06081) : Superstructure : Fire Wall
| 26***40 | Cellular Rubber 10x130x250 Bulk Ware, State Length Required | 0 |
| 30***99 | Bolt | 8 |
| 33***99 | Bolt | 16 |
Komatsu : H185s-1(S/N G06081) : Superstructure : Pin, Boom - Counterweight
| 26***40 | Washer | 8 |
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06081) : Superstructure : Rails And Platforms
| 27***40 | Grating | 1 |
| 30***99 | Screw | 16 |
| 30***99 | Screw | 0 |
Komatsu : H185s-1(S/N G06081) : Superstructure : Telescopic Steps Arr. And Ladders
| 11***99 | Cable Clamp | 2 |
| 18***40 | Limit Switch | 1 |
| 30***99 | Bolt | 1 |
Swing Ring
Komatsu : H185s-1(S/N G06081) : Swing Ring : --Brake
| 31***99 | Screw Plug | 8 |
| 34***99 | Seal Ring | 8 |
| 34***99 | Circlip | 1 |
Komatsu : H185s-1(S/N G06081) : Swing Ring : -Hydr. Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06081) : Swing 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 G06081) : Swing Ring : Swing Ring And Swing Gear Box Arr.
| 00***98 | Grease Nipple | 32 |
| 08***40 | Quick Disconnect Coupling | 1 |
| 08***40 | Protection Cap | 1 |
Switch- And Junction Boxes
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Switch- And Junction Boxes : Cables - Engine, Cu
| 00***98 | Clamp 15/15 | 20 |
| 05***40 | Rubber Grommet | 4 |
| 05***40 | Plug 3-Polig | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : 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 | 3 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : 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 G06081) : 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 G06081) : Switch- And Junction Boxes : Main Switch Box X2
Undercarriage
Komatsu : H185s-1(S/N G06081) : Undercarriage : --Brake
| 00***98 | Shaft Seal | 2 |
| 31***99 | Plug | 9 |
| 33***99 | Seal Ring | 9 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : -Gear
| 00***98 | Shaft Seal | 2 |
| 08***95 | Shaft Seal | 2 |
| 30***99 | Bolt | 12 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : -Motor
| 25***40 | Plug | 1 |
| 31***99 | Screw M8 X 20 | 14 |
| 31***99 | Bolt | 8 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Bottom Roller
| 30***99 | Bolt | 8 |
| 32***40 | Plug | 1 |
| 32***40 | Plug | 1 |
Komatsu : H185s-1(S/N G06081) : 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 G06081) : Undercarriage : Hydraulic
Komatsu : H185s-1(S/N G06081) : Undercarriage : Idler Assy.
| 30***99 | Screw | 8 |
| 31***40 | Axle Stirrup | 4 |
| 31***99 | Washer | 8 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Parking Brake
| 21***99 | Pipe, Assembly. ? 15x60 Bulk Ware, State Length Required | 0 |
| 25***40 | Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required | 0 |
| 25***40 | Socket, From S/No: 06 085 | 2 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Rotary Joint
| 16***40 | Screw Plug | 4 |
| 20***40 | Screw Plug | 2 |
| 30***99 | Bolt | 4 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Side Frame
| 22***40 | Lifetime Seal | 4 |
| 25***40 | Hv-Washer | 80 |
| 30***99 | Bolt | 16 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Top Roller
| 31***99 | Plug | 1 |
| 34***99 | Dowel Pin | 2 |
| 42***40 | Pin | 1 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Track Adjuster
| 00***98 | Test Socket | 2 |
| 18***40 | Pressure Relief Valve | 1 |
| 21***99 | Pipe ? 20x75 Bulk Ware, State Length Required | 0 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Track Group
| 34***99 | Washer | 368 |
| 42***40 | Track Group Incl. Fig-Nos: 11-15 800 Breit Einschl | 1 |
| 42***40 | Track Group (Cold Weather Design) Incl. Fig-Nos: 11-15 800 Breit | 1 |
Komatsu : H185s-1(S/N G06081) : Undercarriage : Undercarriage
| 30***40 | Pin (Standard) | 8 |
| 30***99 | Screw | 80 |
| 30***99 | Bolt | 12 |
Frequently asked questions
What engine powers the Komatsu H185S-1 (S/N G06081)?
A Cummins KTTA38-C1350, a mechanical V12 diesel with a PT fuel system, rated roughly 840 kW (1,125 hp) at 1800 rpm. It predates electronic engine control, so it is monitored through gauges and warning lamps rather than diagnostic fault codes.
What is the operating weight of the Komatsu H185S-1 (S/N G06081)?
Approximately 216,000 kg (about 476,200 lb) in standard face-shovel configuration. Exact weight varies by bucket size and whether the machine is set up as a face shovel or backhoe conversion.
What replaced the Komatsu H185S-1?
Sources do not document a single named direct successor for this exact model. Komatsu phased the Demag-heritage H-series shovel range out of new production through the 2000s as its PC-series mining shovels expanded, with the PC3000 standing as the closest size-equivalent in Komatsu's current mining excavator lineup - check with a Komatsu dealer for the current recommended equivalent.
What H185S-1(S/N G06081) owners discuss
What do operators say about the engine and overall powertrain on the H185S-1?
This shovel carries a large-displacement diesel in the roughly 839 kW (1,125 hp) class, sized to the machine's 216 t (476,300 lb) operating weight and 14 m³ shovel bucket. Owners and mechanics who have run these units describe the powertrain as heavy-duty and long-lived when serviced on schedule, with examples still doing production work well over a decade after new. Confirm the engine model off the dataplate before ordering filters, injectors, or overhaul kits rather than assuming it matches another serial in the same production run.
How does the hydraulic control system behave, and is it trustworthy?
The H185S line runs electronic-over-hydraulic control rather than the straight hydraulic-over-hydraulic pilot system used on most large shovels of its era, and that is the design trait operators call out most when comparing it to older shovels in the same family. Community consensus is favorable: crews describe examples still doing production loading work decades after new, calling them consistently good, hard-working machines. The tradeoff is that the electronic control loop sits between joystick input and pump response, so if response goes soft or inconsistent, check the pump control electronics and harness first rather than assuming a worn pump.
What undercarriage and wear patterns show up on this class of shovel?
As a face-shovel configured machine working full shifts loading haul trucks, the undercarriage and bucket linkage take the brunt of duty-cycle wear. Track pads, rollers, idlers and sprockets show uneven wear proportional to hours and ground conditions, consistent with any large excavator carrying this tonnage. Machines in this class are commonly fitted with an auto-lube system for chassis grease points. Where that system has been neglected, expect accelerated pin and bushing wear at the boom and stick linkage before the undercarriage itself shows the worst of it.
Is factory parts and dealer support still solid for this machine?
This is the recurring complaint among owners of legacy Demag-badged shovels now under Komatsu ownership. Owners report that sourcing major hydraulic components has gotten harder over time, with factory support for the older Demag-era models winding down in favor of newer Komatsu-badged shovels. Fleets running these units long-term describe buying up spare hydraulic and drive components proactively rather than waiting for a breakdown, since lead times on factory-sourced replacements for this line can run long.
What electrical or sensor issues come up with the control system?
Because pump and function control runs through an electronic control loop rather than direct hydraulic pilot lines, a joystick command that does not reach the control unit cleanly, whether from a corroded connector, chafed harness, or weak signal, shows up as sluggish or uneven function response rather than a dead function. This is a general characteristic of electronic-over-hydraulic pump control on machines of this design, not a documented fault-code list specific to this serial. Have your dealer or a technician familiar with this control system check the wiring harness and control unit before condemning a pump.
What should a buyer check before purchasing a used H185S-1(S/N G06081)?
Start with the dataplate to confirm serial-specific configuration. Engine rating and hydraulic component fitment can vary within the H185S production run, so do not assume this exact serial matches a listing for a different unit. Cycle every hydraulic function under load and watch for sluggish or uneven response, the tell for control-unit or harness issues on this electronic-over-hydraulic system. Inspect track pads, rollers, idlers and sprockets for uneven wear, and confirm the auto-lube system is intact and actually cycling grease to the boom and stick pins. Ask for engine and pump hour history and any record of major hydraulic component replacement, since parts lead times on this legacy line run long and a machine with recent pump or cylinder work is worth a premium. Given the tonnage and hydraulic pressures involved, have your dealer or a qualified mining-shovel technician inspect the machine in person before money changes hands.
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 G06081). Related factory variants of the same model family:
H185S-1(S/N G06123)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)H185S-1(S/N G06122)
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